Pay attention to the suitability of choosing ppe

The timing of the replacement of engine oil by the Ito generator makes it very easy for customers who use the generator set to purchase a permanent generator that can be used to their full potential and value for money. How does the performance of Ito generator group be differentiated? 1. The durability index refers to the limit time during which the main parts of the diesel engine wear out during operation and cannot continue to work normally. Usually measured by the length of life of the diesel engine.

The service life of a diesel engine, that is, the overhaul period of a diesel engine, refers to the cumulative operating time of the diesel engine from the start of use to the first overhaul. The service life of the diesel engine for generator set is generally 6000-8000h2. The reliability index refers to the index of the normal continuous operation capability of the diesel engine under the specified use conditions. Generally, the number of non-stop failures, the number of shutdown failures, and the replacement of main components are included in the warranty period. Not represented by the main part. The fault-free guarantee period for generator sets and diesel engines is generally 500 to 2000 hours.

Product Features: High-voltage Ito generator components are diesel and heavy oil dual-purpose, with high voltage regulation accuracy, dynamic performance, small voltage waveform distortion, high efficiency, compact structure, easy maintenance, reliable work, long service life, good economic performance, etc. Features.

Requirements and conditions for parallel operation: The entire process of putting Ito power generators into parallel operation is called parallel operation. One generator set will be run first, and the voltage will be sent to the busbar. After the other generator set starts, it will generate power with 100 billion sets. The units are juxtaposed. At the instant of closing, the generator set should not have harmful inrush current and the shaft should not be subject to sudden impact. After closing, the transfer should be able to be pulled into synchronization very quickly, so the generator must be in line with the following conditions:

1. The rms voltage and waveform of the genset must be the same;

2. The phase of the two generator voltages is the same;

3. The frequency of the two generator sets must be the same;

4. The phase sequence of the two generator sets is the same.

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Masغير مجاز مي باشدe Bar,Masغير مجاز مي باشدe Oil Bar,Masغير مجاز مي باشدe Bar For Sore Muscles,Therapy Masغير مجاز مي باشدe Bar

nantong pinli fitness co.,ltd , https://www.cnpinlifitness.com

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-- About Withair® --
   
Withair® is a global provider of technical products and services for sustainability and resource management, specialize in heating & cooling system, air quality system, Eco Solvent Printer and UV Flatbed Printer and clean energy technology development and utilization,now it has three factories,manufacturing different kinds of products,and committed to providing the first-class products & system solutions for clients.

At Withair®, our aim is to support the growth, profit, and sustainability goals of our clients by delivering innovative solutions with n x value.we gain a deep understanding of our client's needs and business objectives first and foremost by gaining and leveraging our technical knowledge, innovative thinking, and vast equipment resources. from heating & cooling solutions and air quality management,to energy performance and efficiency determination,Withair® delivers the results.

Withair® products & solutions combine utmost efficiency with minimum energy consumption and strict respect of the environment, the idea proved to be a winning one in just a few years, Withair® became the leader in the sector !

Withair® has highly effective professional team to service customers

Known for their professionalism and personal integrity, Withair's highly skilled engineers, technicians, electricians, stable manufacturing workers, strict quality controller, and quick-reaction & professional after-service staff utilize their multi-disciplinary expertise in the creation and production of every solution.

Close cooperation among Withair's design, production and service teams - who are located under one roof and linked by advanced computerized systems - enables the Company to supply the widest possible range of products - from single units to very large quantities - while assuring rapid delivery and competitive pricing.


-- Product Description --

Withair® is a professional manufacturer of UV flatbed printer, universal UV inkjet flatbed printer and printing machines and combine development, production and marketing together. Printers use advanced production technology, be popular in domestic and abroad.

The mainly products are: UV flatbed printer, universal inkjet flatbed printer. The application of our UV flatbed printers is without any material restrictions, can be widely printed on Glass, Ceramics, Plank or wood, Crystal, PVC, ABS, Acrylic, Metal, Plastic, Stone, Leather and others.  Whether a simple block color pattern,  full-color pattern or color pattern with transition, all can be complete by once printing. No need plate-making, no need plate burning and repeated chromatography. UV printers are with low غير مجاز مي باشدts, but they are widely used in glass artwork and technology, glass sliding door, screen printing, gift processing, ads & signs marking, decoration and other various fields.

In the future, we will continue to blaze new trails, We would like to express our thanks to our new and old customers at home and abroad for their constant trust. We are willing to cooperate with you common development.


-- The Key Advantages Include --

* Fast speed super-high precision.

* Technical indicators meet customer demand in industry.

* 7PL variable droplet technology, high accuracy printing.

* Full steel structure, long life and corrosion resistance.

* Imported environment friendly LED-UV curing systems.

* Intelligent ink alarm system.

* The lowest غير مجاز مي باشدt, super high return.

* Meet your printing requirements in industrial-type
No.1 Collocate with 2~4  high accuracy Ricoh printheads, ink dripping variable technique, steel structure;
No.2 With CISS(continuous ink-supply system) and high-speed printing in continuous and stable state.
No.3 Using high quality import spare parts, such as Leadshine servo motor, HIWIN guide rail, Siemens and Schneider, etc.
No.4 With double 4 color, CMYK color, white color, spot color and etc. Over 10 kinds of combination;
No.5 With advanced Ultraprint, MainTop and etc. Color management software;
No.6 Intelligent servo driving of Y-axis control program, it can make the stepping precision get to0.03mm;
No.7 Hi-power, life long and environmental friendly LED-UV curing system

*  Humanized protection safety design
No.1 Intelligent accidentally hit designing, protect printhead from damage;
No.2 With anti-static protection, reduce print misting;
No.3 With light leak device, cut down damages and improve efficiency.

* Humanized automatic control design
No.1 High efficiency Y-axis double null printing;
No.2 Be with convenient adsorbed control function and make material not warping;
No.3 Independent switches control every circuit;
No.4 Automatic head protection device when shut down.

* With 10 kinds printing technologies for your choice
No.1 Two kinds embossed printing technologies: color+white, white+white...+color;
No.2 Four kinds white printing technologies: white background, spot colour white, fill color white, reverse white;
No.3 Four kinds printing modes: single color, dual-color, single while, double white.

*  Import UV ink with different functions
Import UV inks, nano ink particle do not plug, nice and fastness color, much more stability, meet you various requirement in printing.

* Printing table with all the advantages of flatbed printing equipment

*  High precision servo motor
Adopt high accuracy double servo and screw of Y-axis driving method, it can make the media stepping precision get to 0.03mm;

* Printing stability
Use the original internal heating printhead, fast heating, high precision of temperature control, to make sure the inks visغير مجاز مي باشدity stable when in high-speed printing, reduce the defective rate.

* High speed printing with 2 Epson printheads, the printing speed can up to 25m²/h/4pass.

*  Colors combination
With double CMYK color, white, special colour and others over 0 kinds printing combination.

*  Embossed printing
Software controls print-head flexible, with color+white, white+white...+color stereo embossed performance.

*  White printing
Make the printing of white background, spot colour white, fill color white, reverse white come true by image RIP technology, special inkjet printing effect can be showed on transparent and color material flexible.

*  Four kinds printing modes
Single color, dual-color, single while, double white, all with full automatic controlling.

*  Double null printing
Double null printing function in Y front and back direction, save energy and high efficient.

*  Height adjustment
Use the computer adjusts the height according to material thickness.

*  Close printhead automatically when printer stops
Electric ink stack, with printhead protection device when close machine.

*  Optional separate-chamber adsorption
Optional separate-chamber adsorption tablet, to make sure thin material not warping.

*  Anti-static designing
Eliminate the static of printing materials, avoid ink misting.

*  Prevent collisions design
Prevent print-head from accidental damages.

*  Prevent light-leaking
The designing with leaky protection device, reduce light loss and improve efficiency.

* Cleaning system
Automatic cleaning, anti-clogging flash function & capping system.

*  Adopting Ricoh print head
Ricoh print head has higher print speed and performance with its internal heating function compared to other types of printheads. It is durable and suitable for all kinds of ink. Its variable drop printing(7pl-35pl) delivers more delicate and higher resolution print results.

* Printing on roll and rigid media
This printing machine has two printing function: rolling printing and flat bed printing. In addition to printing roll-to-roll, you can also print rigid materials with the maximum size of 3200mm as normal flatbed printer do.

*  Anti-collision function
The cartridge stop working automatically when it collides with medias, protect the cartridge and printheads from damage.

*  UV LED lamps for UV curing
Our UV printers employ UV LED lamps for UV curing, which is power-saving and efficient.  No heat produced, it has a huge advantages on printing  thermal sensitive substrate. Besides, UV LED lamps is long-life and zero-pollution.

*  4-7 color printing
Hybrid printer allows 4-7 color printing, including CMYK, Lc, Lm and white ink, with which can produce special image effects such as relief and 3D, to get your unique prints.

*  Automatic materials thickness measurement
Automatically measure the thickness of substrates, precise, time-saving and labor saving.

*  Negative pressure system for ink supply
Printers use negative pressure system to make ink supply smoother and get more vivid images. With pressure display, the pressure is easy to be seen and adjusted.

*  ECO-friendly
No VOC UV curable ink and no pollution UV LED lamps are used.

*  Rigid materials
Glass, acrylic, leather, wood, metal plate, pvc board, waved plate, corrugated sheet, reflective film etc.

*  Flexible materials
Wallpaper, advertising paper, car sticker etc.


-- Technical Data --

-- Withair® Certificates and Awards --

-- Payment terms --

-- Delivery & Packaging --

*  100% test before deliverying products.
*  Products catalogue, installation & operation manual will be sent together.
*  Tracking number will be sent to customer as soon as we ship the products.
*  Item shipped in 25 working days against payment depends on the quantity.
*  Four steps of pakacges, plastic film, foam, carton and plywood for stable transporation.
*  Ocean shipping, railway shipment and air transportation are acceptable according to customer demand.

-- FAQ --

Q1. Can I have a sample order for Withair' products ?
A: Yes, we welcome sample order to test and check quality. Mixed samples are acceptable.

Q2. What about the delivery time ?
A: Sample needs 15 days, mass production time needs 2-3 weeks for order quantity more than one container

Q3. Do you have any MOQ limit for Withair' products ?
A: Low MOQ, 1pc for sample checking is available

Q4. What is Withair® certification ?
A:  The certificate we have include: CE, RoHs,SGS, CE, UL, ISO9001. ISO18001, ISO14001, national Lab inspecton report, technology patents and so on.

Q5. Where are Withair' products installed till now ?
A: Currently Withair' products has been installed China, Europe, Africa, Middle-East, U.S.A, South American and so on.

Q6. Withair® Agent's & Distributor's Benefits ?
A: *  Favorable prices & high quality products.
    *  New business opportunities & profits.
    *  Free of charge for brochures & technical data.
    *  Training for products of technical & marketing.
    *  Customer resources sharing in the territory.
  &nb
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At present, domestic computer users cannot access foreign websites. Although there are many methods of cracking or غير مجاز مي باشدing on the Internet, it is either not stable or the operation is too complicated or it can not be used or the price is too high. The ordinary people cannot bear it. Due to the increasing number of foreign trade businesses or the need for foreign exchanges, many people want a simple, convenient, stable, smooth, and غير مجاز مي باشدt-effective way to visit foreign websites. The recent launch of the PC global communications model has made people's eyes brighter. It not only satisfies the need for people to freely access news, transactions, communications, and video websites in foreign countries, but also provides affordable prices that are acceptable to the average family, especially stable and smooth. The convenient mode that can be used with one click to install the APP is welcomed by even the middle-aged and elderly people.

Using PC GSM to access foreign websites is as simple as domestic users logging into domestic websites.

Data search, news browsing and download. Domestic users are accustomed to using Baidu, Sogou, 360 and other search, while visiting foreign websites can use google or YouTube and other search engines to search for any information they want. Accessing information, browsing international news, downloading information, downloading software, etc. are quick and easy. Don't worry about language barriers, because Google Chrome has a translation feature that translates to your favorite text in one click.

Video on demand, live TV, rebroadcast. Domestic customers are accustomed to surfing the Internet to visit Youku, bizarre, potatoes and other video sites to enjoy various audio and video programs such as large-scale episodes. Using PC GSM to log on to foreign video websites can be the same as accessing domestic websites and enjoying the latest foreign film shows. The world famous music, exotic scenery, strange people, adventure exploration, exotic animals, raptors, desert canyons, and foreign styles, etc., can enjoy watching and downloading various types of videos that cannot be enjoyed in the country. In China, you can use computer search to watch live domestic synchronous TV broadcasts. You can use PC Globalcom to search and watch foreign TV broadcast channels and rebroadcast programs that are not visible in China, including Hong Kong, Taiwan, Macau, Japan, Korea, Europe, and the United States. It is hereby reminded that low-level vulgarities and violations of national laws and regulations must be viewed with less attention, and they must not be transmitted. Otherwise, the consequences are your own!

Make friends abroad and communicate with foreign friends. With PC Communicator, just register a Facebook (Facebook) or Twitter account, you can chat with foreign friends like QQ, WeChat. You can even post and promote your latest product information and sell your products around the world. There are translation functions on these exchanges.

Shopping outside the domain. With PC Global, it is more convenient to buy things on foreign shopping sites. Without PC global communications, it is impossible to access overseas shopping sites.

Being able to land on foreign websites will greatly broaden their horizons, increase information and exchanges, and play an important role in enhancing business performance, understanding foreign dynamics, promoting international exchanges, and changing the quality of life.

The use of PC WorldCom is very simple. Log in to jiasu123.net website and register members successfully in the purchase package. One day experience, quarterly package, half-year package, and one-year package, you can choose freely, average less than one yuan per day, high bandwidth, large flow, you can Meet the needs of the average guest on the internet. After purchasing the package, you can see the parameters of the products you purchased in the member user center. After downloading the app from the website, simply enter several parameters into it and you're done. Go to Google, YouTube, and other foreign websites. Do whatever you like, follow your lead. And in order to!

Maybe some computer beginners think that I only understand fur on computers and won't they get it? No need to worry, the website has detailed tutorials, will teach you step by step how to register, how to download, how to edit the APP client, as well as online QQ can consult at any time, as well as customer service phone, answer your inquiry at any time!

Quietly tell you a good news, Android version of the 'mobile global search client' is also available, with Android phone, Android network set-top box can also easily landed on foreign websites!

For more information, please search "Chunyuan Liying" login and online customer service inquiry.

Prefilled Syringes

Pharmaceutical prefilled Syringes, we are the specialist of prefilled Syringes, prefilled Syringes With Needle, wholesale high-quality products of Glass Prefilled Syringe R & D from China.Finished prefilled syringes can meet the FDA`s authorised 14-day sterility test and bagging with ETO Sterilization.We have the perfect after-sales service and technical support.

Prefillable Syringes,Preloaded Syringes,Prefilled Syringes

China Lemon Trading Co.,Ltd , https://www.sterilevial.nl

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Christopher Nolan is undoubtedly one of the best-selling Hollywood directors. In the foreign IMDB website (Internet movie database, similar to watercress), lists all brain-stretching films and explosive action films taken by Christopher Nolan. . (Management: 17173VR_Magic Cookie)

Everyone is familiar with the "Batman Dark Knight Trilogy", "Pirates of Dream Space", "Memory Fragments", "Interstellar", "Deadly Magic" and other familiar classic movies are from the hands of Christopher Nolan. Recently, it was reported that Christopher Nolan will launch a VR experience of Dun******k, a brand new movie based on the theme of the Second World War.

However, using VR to promote movies is now a general trend. Dun******k will release a short VR video before the release of the movie. It is reported that the VR propaganda film titled “Save Every Breath” will show viewers the terror and cruelty of the Second World War. The general publicity video is completely different from the VR video. The VR video will show more exciting moments and action war scenes in the movie.

Interestingly, although the fascinating pop culture is related to movies and games, content based on the Second World War is rarely presented in the form of virtual reality. Coincidentally, after the Dun******k movie was released, the new war games "Call of Duty: World War II" and "German Command: The Giant on the Horizon" are also on the up line. Both fans and game lovers can Nazi history has a deeper understanding.

"Dun******k" VR propaganda film is scheduled to be officially released on July 7, the YouTube 360, Facebook 360 and other mainstream platforms (release date of the film is July 21st).

                   

AGV Battery Charger And Discharger

The main control unit of the equipment is PLC and the HMI (Human Machine Interface) is 7" LCD colorful touch screen. The equipment has varieties of operating modes, and can automatically record and save working status.The complete set of equipment is easy to operate, reliable in working, complete in protection and high in automation. 

It has the features of high reliability, high pulse symmetry, strong anti-interference ability, quick reaction, as well as the advantages of no heat-generating, constant current, energy-saving which is compared with the discharge with the electrical resistance. 

Battery Charger Discharger,Charging And Discharging Of Battery,Intelligent Battery Charger And Discharger,Agv Battery Charger And Discharger

Xinxiang Taihang Jiaxin Electric Tech Co., Ltd , https://www.chargers.be

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1. GPS Synchronous Clock and Output 1.1 GPS Synchronous Clock The Global Positioning System (GPS) consists of a set of satellites launched by the US Department of Defense in 1978 and has a total of 24 satellites operating in 6 geocentric orbital planes. Internally, the number of satellites visible on Earth has varied from 4 to 11 depending on time and place.

The GPS synchronization clock is a receiving device that receives a low-power radio signal transmitted by a GPS satellite and calculates the GPS time by calculation. In order to obtain accurate GPS time, the GPS synchronization clock must first receive signals from at least four GPS satellites and calculate its own three-dimensional position. After the specific position has been obtained, the GPS synchronization clock can ensure the accuracy of the clock travel time as long as it receives one GPS satellite signal.

As the standard clock of thermal power plants, our basic requirements for GPS synchronous clocks are: At least 8 satellites can be tracked at the same time, with the shortest possible cold and warm start-up time, backup battery, high-accuracy and flexible configuration clocks. output signal.

1.2 GPS synchronous clock signal output At present, the GPS synchronous clock output signal used by the power plant mainly has the following three types:

1.2.11 PPS/1PPM Output This format outputs one pulse per second or per minute. Obviously, the clock pulse output does not contain specific time information.

1.2.2 IRIG-B output IRIG (the Inter-Range Instrumentation Group of the United States) has several coding standards A, B, D, E, G, and H (IRIG Standard 200-98). Among them, IRIG-B coding is most used in clock synchronization applications, and there are bc level shift (DC code), 1 kHz sinusoidal carrier amplitude modulation (AC code) and other formats. IRIG-B signal output one frame per second (1fps), each frame is one second long. One frame has a total of 100 symbols (100pps), each symbol is 10ms wide, and the binary 0, 1 and position flag bits (P) are represented by symbols of different positive pulse widths, as shown in Figure 1.2.2-1.

The seconds, minutes, hours, and days (days since January 1 of the current year) are represented by BCD codes, and the Control Functions (CF) and the Straight Binary Seconds Time of Day (SBS) are Serial binary "0" padding (CF and SBS optional, not used in this example).

1.2.3 RS-232/RS-422/RS-485 Output This clock output sends a series of date and time mesغير مجاز مي باشدes expressed in ASCII code through the EIA standard serial interface and is output once per second. Parity check, clock status, and diagnostic information can be inserted in the time mesغير مجاز مي باشدe. This output currently has no standard format. The following figure shows an example of sending a standard time with 17 bytes:

1.3 Application of GPS Synchronous Clock in Power Automation System There are numerous systems or devices in the power automation system that need to synchronize with the GPS synchronous clock, such as DCS, PLC, NCS, SIS, MIS, RTU, fault recorder, and microcomputer protection device. When determining the GPS synchronization clock, the following points should be noted: (1) These systems belong to the thermal control, electrical, and system disciplines. If it is decided that the GPS synchronization clock provided by the DCS manufacturer achieves time synchronization (currently common practice), then the DCS contract Before negotiations, cooperation between professionals should be carried out to determine the requirements of the clock signal interface. (GPS synchronization clock can generally be configured with different number and type of output modules. If the relevant requirements cannot be determined in advance, the corresponding contract clauses should leave room for adjustment.)

(2) Whether each system shares a set of GPS synchronization clock devices should be based on comprehensive consideration of the difficulty of system clock interface coordination and the geographical location of the system. If each major has a large difference in the type or accuracy requirements of the interface of the GPS synchronous clock signal, the GPS synchronization clock can be configured separately. This can reduce mutual restraint between professionals, and secondly, the system clock synchronization scheme can be more easily realized. In addition, when the systems are far away from each other (for example, the water treatment plant and the desulphurization plant are far away from the centralized control building), in order to reduce the electromagnetic interference when the clock signal is transmitted over a long distance, a GPS synchronization clock may also be set up locally. Separate GPS synchronization clock also helps to reduce the impact of clock failures.

(3) IRIG-B code has high reliability and interface specification. If the clock synchronization interface is optional, it can be used preferentially. However, it should be noted that IRIG-B is only a generic term for Class B coding, and it is divided into multiple types (such as IRIG-B000, etc.) according to whether the coding is modulated or not, whether there is CF or SBS, etc. Therefore, the corresponding decoder card should be configured on the clock receiving side. , otherwise it is impossible to achieve accurate clock synchronization.

(4) 1PPS/1PPM pulse does not transmit TOD information, but its synchronization accuracy is high, so it is often used for clock synchronization of SOE modules. Although the RS-232 time output is used more often, but because there is no standard format, the design should pay special attention to confirm whether the clock signal is authorized and whether the format of the two clock mesغير مجاز مي باشدes can be agreed.

(5) Although the control and information systems in the thermal power plant are interconnected, the clock synchronization protocol of each system may not be the same, so it is still necessary to separately access the GPS synchronous clock signal. Even if the bridge DCS and public DCS are connected via a bridge, if the clock synchronization signal has a large delay in the network, synchronization with the GPS synchronization clock should be considered separately.

Second, the new DNTS clock synchronization method

The new DNF4533 series of time and frequency products manufactured by China Shinsei Co., Ltd. using advanced algorithms and highly reliable devices can meet current and future demand for time and frequency.

DNF4533 uses a high-precision timing GPS receiver and a low-phase noise, low-drift dual thermostat high stability crystal oscillator, patented frequency measurement and control technology, precision measurement and calibration of the crystal oscillator output frequency, so that the GPS Tamed crystal output frequency Precise synchronization The DNF4533 is used as a reference clock source (PRS) on a GPS system. It provides highly stable primary clock synchronization signals that provide self-monitoring. Outputs 2048kb/s, 2048kHz, 1PPS, and IRIG-B signals. A Class 1 reference clock source that meets the requirements of ITU-T G.811.

Used as a retime device. The retiming function combines the device's tracking GPS (or terrestrial reference) good timing reference signal with the service code stream signal so that the service code stream can pass the timing reference signal well if the device itself degrades or powers down. , The device automatically starts through mode.

As a CDMA clock source. It can provide clock source for CDMA base stations. It can provide 19.6608Mhz square wave signal, PP2S signal, 10M sine signal or square wave signal. Customizable signals: 16.384MHz, 14.4MHz. (for digital cluster applications)

DNF4533GPS synchronous clock source products have been widely used in telecommunications, mobile communications, power and transportation, networking, digital broadcasting, metrology testing, astronomical observations, aerospace monitoring and control, defense and military and other departments.

It can be seen from the above-mentioned TXP clock synchronization mode and clock precision that the various clocks in the TXP system adopt the master-slave hierarchical synchronization mode, that is, the lower-level clock is synchronized with the upper-level clock, and the higher the precision of the upper-level clock.

Third, the clock and clock synchronization error 3.1 clock error As we all know, the computer's clock is generally used quartz crystal oscillator. The crystal oscillator continuously generates clock pulses of a certain frequency, and the counter accumulates these pulses to obtain the time value. Since the clock oscillator's pulse is affected by various instability factors such as ambient temperature, load capacitance, excitation level, and crystal aging, the clock itself is inevitably subject to errors. For example, for a clock with an accuracy of ±20ppm, the hourly error is: (1 × 60 × 60 × 1000ms) × (20/10.6) = 72ms, and the cumulative error for a day can reach 1.73s; if it is working at ambient temperature Changing from the rated 25°C to 45°C will also increase the additional error of ±25ppm. It can be seen that if the clock in the DCS is not regularly calibrated, the error after free running for a period of time can be unacceptable to the system application.

With the development of crystal manufacturing technology, there are various high-stability crystal oscillators available for applications requiring high-accuracy clocks, such as TCXO (temperature-compensated crystal), VCXO (voltage-controlled crystal), and OCXO (temperature-controlled crystal) )Wait.

3.2 Clock synchronization error If you analyze the clock synchronization method similar to TXP, it is not difficult to find that the absolute time error of the DCS generated by the clock in the top-down synchronization process can be composed of the following three parts:

3.2.1 GPS Synchronization Clock and UTC (Coordinated Universal Time) Errors Transmitted by Satellite This part of the error is determined by the accuracy of the GPS synchronization clock. For the 1PPS output, with the leading edge of the pulse as a punctual edge, the accuracy is generally between tens of nanoseconds and 1μs. For the IRIG-B code and RS-232 serial output, for example, the product of the time clock of the National Time Service Center of the Chinese Academy of Sciences synchronizes the time. Accuracy is measured by the deviation of the leading edge or start of the reference symbol relative to the 1PPS front, which is 0.3 μs and 0.2 ms, respectively.

3.2.2 Synchronization Error between DCS Master Clock and GPS Synchronization Clock The master clock on the DCS network and the GPS synchronization clock are synchronized through the "hardwired" method. The standard time code and hardware of the GPS synchronous clock output are generally accepted by a clock synchronization card in a DCS site. For example, if the receiving end compensates for the transmission delay of the ASCII code byte output from the RS-232, or decodes the card with the symbol carrier cycle count or the high frequency pin for the IRIG-B encoding, the master clock and the GPS synchronization clock The accuracy of synchronization can reach very high precision.

3.2.3 Synchronization Errors of Master-Slave Clocks at DCS Sites The master clock of the DCS synchronizes with the slave clocks of the stations through the network. There are transmission delays, propagation delays, and processing delays of clock mesغير مجاز مي باشدes. The performance is as follows: (1) When the master clock generates and sends a time mesغير مجاز مي باشدe, the kernel protocol processing, the overhead of the operating system to invoke the synchronization request, the time to send the time mesغير مجاز مي باشدe to the network communication interface, etc.; (2) at the time Before surfing the Internet, it is necessary to wait for the network to be idle (for Ethernet) and retransmit in case of collision. (3) After the time packet is online, it takes some time to transfer from the master clock end to the child clock end through the DCS network medium (electromagnetic waves are The propagation speed in the optical fiber is 2/3 of the speed of light. For DCS LANs, the propagation delay is several hundred ns, which is negligible; (4) After the network communication interface from the clock side confirms that it is a time mesغير مجاز مي باشدe, it accepts the mesغير مجاز مي باشدe. It also takes time to record the arrival time of the mesغير مجاز مي باشدe, issue an interrupt request, calculate and correct the slave clock, and so on. These delays cause more or less time synchronization errors between the master and slave clocks of the DCS and slave clocks.

Of course, different network types of DCS, different clock communication protocols and synchronization algorithms can make network synchronization accuracy different from each other. The above analysis is based on general principles. In fact, with the unremitting research on network clock synchronization technology, a variety of complex but efficient and accurate clock synchronization protocols and algorithms have emerged and have been applied in practice. For example, Network Time Protocol (NTP), which is widely used on the Internet, can provide ±1 ms time accuracy on a DCS LAN (such as GE's ICS decentralized control system), and the IEEE1588-based standard precision time protocol (Standard Precision). Time Protocol (PTP) enables real-time control of master and slave clocks on Ethernet for submicrosecond synchronization.

Fourth, the normal digital scanning rate clock accuracy SOE design

While DCS reached 1ms, but ≤1ms SOE resolution to meet the requirements of a long period of time, people are always follows the same design The method, that is, place all the SOE points under one controller, and the event triggering the switch signal to hardwire the SOE module, the reason is that there are some errors in the clocks of different controllers. In this regard, Siemens described in the practical situation of its FUPN module distributed configuration of the TXP system, due to the clock can not be synchronized and can not achieve 1msSOE resolution, even more because of the clock difference of nearly 100ms, resulting in SOE event recording sequence Reversed.

Then, how to meet the requirements of the SOE decentralized design of the project (for example, if the utility DCS is set, the unit SOE and utility SOE should be separated, or the trip signals of the MFT and ETS that want to enter the controller do not need to be output and return to the SOE module. Can be used for SOE, etc., but not too much to reduce the SOE resolution? Through the analysis of DCS products is not difficult to find, the commonly used method is to synchronize the controller or SOE module clock directly with the external GPS synchronization clock signal . For example, in ABB Symphony, the punctual master module (INTKM01) of the SOE ServerNode (generally located on the public DCS network) receives the IRIG-B time code and links the generated RS-485 clock synchronization signal to each controller (HCU). The SOE time synchronization module (LPD250A), its onboard hardware timer clock can be connected with 1PPM synchronization pulse and cleared automatically once per minute; for example, the MAX1000+PLUS's distributed processing unit (DPU4E) can be synchronized with IRIG-B, making The DPU's DI point can be used as SOE at the same time. Due to the use of 1PPM or RS-485, IRIG-B hard-wired clock "out-of-sync" to avoid the problem that the current DCS clock synchronization via the network is still less accurate, so that each control The deviation between the clocks is kept within a small range, so the SOE point decentralized design is feasible.

It can be seen that the design of SOE should be determined in the engineering design with the characteristics of DCS adopted. It is not possible to equate a 1 ms switching rate or 1 ms controller (or SOE module) clock relative error with a 1 ms SOE resolution, thereby simply spreading the SOE points throughout the system. At the same time, it should also be noted that SOE points are “dispersed” compared to “centralized”, although the resolution is reduced, but as long as the relative error of the clock is small (such as an order of magnitude with 1ms), it can fully meet the actual needs of power plant accident analysis. of

Single Drum Flavoring Machine

Single Drum Flavoring Machine,Food Seasoning Machine,Snacks Seasoning Machine,Nuts Chips Flavor Coater

Shandong Light M&E Co., Ltd , https://www.chinafoodmachinery.com

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Beauty Island underwear is cheap, stylish, comfortable, the quality of the endorsement, the company pursued the perfect combination of low prices and high quality, refused to low-غير مجاز مي باشدt low-quality speculative management, business objectives and purpose is to establish a unified, orderly, stable and healthy development National chain store, and plans in 3-5 years, "join the beauty island, join hands in creating a win-win" principle, in the country to develop direct sales stores, franchise stores and franchising chain of more than 1000, to achieve leapfrog development Expected goals.

Looking to the future, the Beauty Island underwear will continue to "parity, fashion, comfort, quality," the concept of continuous introduction of new products and continuously enhance the core competitiveness of the brand, for Chinese women to bring more both high-end quality and taste of elegant parity of health Underwear, so that more fashion beauty beauty women to share beauty Island life.

Beauty Island 19 yuan fashion underwear concept store, is the flagship 19 yuan fashion underwear and other high-end home products hot chain model. With more than 1,000 models 19 yuan fashion boutique underwear, is the history of the most styles, the lowest price, the largest national underwear chain brand.
Beauty Island first 19 yuan parity underwear chain mode, set off a wave of cheap underwear in the country, the price of 19 yuan but enjoy the quality of thirty or forty yuan. At the same time, the store's innovative and fashionable decoration style and competitive price are the advantages of the Beauty Island model that attracts franchisees and thousands of fashionable women in the country.

Suede

Suede Fabric,Faux Suede Fabric,Faux Suede Fabric Sofa,Faux Suede Knit Fabric

SHAOXING CITY TIANHONG TRADE CO., LTD , https://www.sxtianhongfabric.com

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The “Heyi hotel event” shocked the country. The hotel’s video surveillance recorded the entire process of a woman’s atrocity. However, even in front of the real surveillance screen, there are still many netizens shouting “Do not believe” and anticipating the anti turn.

Now let's imagine. If you and the hotel’s cameras have integrated audio systems, if you have audio systems in the hotel’s security system, then under the double evidence of screen and sound, the questioning voice will be less, and whether we are closer to the truth or not. ?

Audio monitoring is very promising in smart security

Audio monitoring is an important part of the smart security construction system. It is a comprehensive system with strong prevention capabilities. It is intuitive, accurate, timely, and informative. It is an outstanding feature.

For integrated monitoring of audio and video, the camera is equivalent to the eye, and the pickup is equivalent to the ear. The images seen by the eyes and the sounds heard by the ears are transmitted to the storage server through the nervous system such as optical fiber and network to form a complete audio and video surveillance system, providing high-quality and complete basic data for smart security or smart cities.

Traditional video surveillance systems have no sound. Like early silent movies, people can only see silent images. However, many smart security systems now require increased audio collection. For example, in areas such as safe cities, public security law cases, financial institutions, public transportation, education invigilation, administrative services, law enforcement and evidence collection, more and more quality projects require high-resolution, High-fidelity audio and video synchronization monitoring system has highlighted the importance of audio monitoring in high-quality security projects, and has become a new bright spot for safe cities and smart government affairs.

Audio monitoring system and its role

a complete audio monitoring system includes voice pickup and noise reduction equipment, network audio intercom systems, intelligent audio analysis system.

Pickup: The pickup is the core of the audio monitoring system. It is mainly used to collect the sound of the scene through the vibration of the sound. Pickups are generally classified into digital pickups and analog pickups. Digital pickups are sound sensing devices that convert analog audio signals into digital signals and perform corresponding digital signal processing through a digital signal processing system. The analog pickups only use the general analog circuit to amplify the sound collected by the microphone head.

Network recording intercom system: It mainly includes remote recording system and intercom system. Once the sound is collected, the recording function is automatically activated, and the real-time monitoring function is realized mainly through a voice card and a speaker.

Audio Intelligence Analysis System: Audio Intelligence Analysis is similar to intelligent analysis in video surveillance systems. Through the collection and comparison of voiceprints, the specific characteristics of the voice are analyzed, and the application scenarios at the time can be analyzed.

Intelligent audio system can do what

audio monitoring after years of development, the technology is maturing.

Through the identification of voiceprints can identify the identity of individuals. The generation of human language is a complex physiological and physical process between the body's language center and the vocal organ. The vocal organs (tongues, teeth, throat, lungs, and nasal cavities) used by people in speech vary widely in size and shape, so each Individual voiceprint patterns are unique, with both relative stability and some variation. However, in spite of this, since each person's vocal organs are not the same, it is generally possible to distinguish different people's voices or determine whether they are the same person's voice through an audio system.

Through the audio monitoring scene analysis to determine the abnormal behavior under the scene. This technique is based on the characteristics of various types of abnormal sounds in the time domain and frequency domain, combined with pattern classification methods to alert abnormal events.

In fact, some manufacturers' technology can now be used to identify the speaker's emotions, the environment they live in, and other issues through the recognition of sounds.

Promotion difficulty audio monitoring

said before, traditional monitoring systems rarely have a collection of audio systems. Only in the characteristic project, according to the project demand, will add the audio system in the original monitoring system. The following aspects restrict the application of audio monitoring in the security industry.

1, the غير مجاز مي باشدt problem. Whether it is building a complete audio system or integrating audio products in the original monitoring system or alarm system, it will increase the غير مجاز مي باشدt, which has become an important reason for the promotion of audio monitoring. At the same time, the audio system is not indispensable in some industries such as elimination*, banking, etc. Therefore, considering the issue of غير مجاز مي باشدt, the audio system can be eliminated.

2, technical difficulties. It is not difficult to collect audio systems in the original security system. Basic technical difficulties can be solved. However, there are some special industries that have very high audio requirements. In the open and noisy environment, the audio system is required to have strong anti-interference ability and strong noise removal technology. In a particularly quiet environment, it is required to hear very subtle sounds. For example, the supervision of the interrogation and firearms room, the slightest sound can be collected at the first time. The sensitivity of the pickup must be very high, and the original sound must be achieved. effect. In short, in different areas of the environment, the requirements for audio monitoring equipment are also very different. This is also an important reason why audio monitoring technology standards have not been uniformly standardized.

3, privacy issues. Audio monitoring provides convenience and security, and it may also bring privacy issues. Some people worry that voiceprints can identify speakers without their consent and violate their privacy and freedom of speech. Once these technologies are mature, it will certainly generate many privacy issues, which is very easy to understand. The question of how to obtain voiceprints and when to obtain voiceprints is a very vague question.

With the advancement of the safe city and the acceleration of the anti-terrorism process, the requirements for the construction of the security system are also increasing. People have begun to pay attention to audio monitoring, and more and more industries and scenes are increasingly demanding video and audio synchronization monitoring. No matter whether it is a public security inspection agency, or an airport, railway, bank or other key unit, more and more high-quality security projects urgently require clear and realistic video and audio synchronization monitoring systems.

PET Bottle Recycling Machine

PET Bottle Recycling Machine is beglong to Plastic Recycling Machine , it is applied in PET waste bottle or sheet recycling field. Through crushing, washing and dry process, the waste bottle or sheet will become to be bottle flakes. The flakes are widely used in plastic industry, like sheet, and profile production. The clean flakes can be used to produce the polyester staple fiber, PET strap band, granules, PET transparent film and sheets, etc. The top class flakes can be used to blow bottles again.recycling machine can be designed on the basis of how dirty the flakes are, and make sure of the quality of the final products are very clean.recycling machine output we can supply is from 300kg/h to 2000kg/h.

Pet Bottle Recycling Machine,Plastic Bottle Recycling Machine,waste plastic recycling machine,plastic recycling plant

zhangjiagang sevenstars machinery co.,ltd , https://www.sevenstarsmachinery.com

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Blank Flange RTJ

Blank Flange with Ring Type Joint sealing face, Blank Flange RTJ for high rating class of ANSI B16.5 or ANSI B16.47 standard Class 600 900 1500 2500, usually the pressure from 600lbs have RTJ for blank (blind), very often using in blank of 600lbs 900lbs 1500lbs 2500lbs, Blank RTJ is different to Blank Raised Face

blank flange rtj, blank ring type joint, blind rtj, ansi asme b16.5 blind blank rtj, b16.47 blank rtj

Jinan Hyupshin Flanges Co., Ltd , https://www.iflange.com

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Bearing And Bush

Ceramic bearing under [FLK" trademark, adopts advanced ceramic

processing technology and can provide ceramic bearings in various

materials, which are widely used in mechanical facilities like sealess pumps,

multistage pumps, submersible pump, chemical pumps, centrifuges and

valves etc.

We can develop various bearings of high-parameter, high-precision & highperformance

in different ceramic materials and carbon as specified by

customers.

Sealmann bearing products has the following excellent characters :

High resistance to wear

Resistance to corrosion in aggressive media

High thermal conductivity

Low distortion under thermal loads

Thermal shock resistance

Bearing And Bush,Ssic Bush,Sic Bearing,Sisic Sleeve

Ningbo FLK Technology Co., Ltd. , https://www.flk-global.com

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# Original Innovator # # Desktop Story #

Although the date of the event is approaching, I still cannot get time to code this text. It seems that this time we must catch the last bus.

Supplement map, desktop

Computer articles

First of all, I felt distressed for a minute first. In the face of Asus, who had just left me, she finally retired in glory. She bought it when I first went to college. She was not pursuing performance at the time. There is no value for money when it comes to replacing hardware.) So quietly accompany me through the four years of university time and the period after graduation. Now the Siren have gone, but I still squeezed her last trace of value, the memory has been out, the hard drive was removed and I was a mobile hard drive, gave me the router used...

Orrick 2.5-inch mobile hard disk box, put in the shopping cart for a long time, this time taking advantage of the old Liu family quickly won

ORICO AD29U3 mobile hard disk box usb3.0 external read 2.5-inch notebook solid state drive hard disk box 38 yuan translucent matte, Yan value is still very good Oh Jingdong to buy

The activities of 199-100 that day, and then put together something to eat gray, this is more worthwhile, after preparing to re-enter a support 3.5 market.

On the other hand, when he was a senior, he felt that Assos was a little cheaper and old enough to feel good about rice. In addition, when I was soft out of the surface pro (RT this cargo is really a pit) my heart has been planted grass, but unfortunately was not looking for a good job at the time, plus the price can be set up a very good desktop performance, so also Shelved. Later, all kinds of visiting the forum to see it, and finally found her, ASUS TF810 C this configuration of the goods you do not Tucao, basically you can use win and weak to express, but relatively speaking, I focus on such as metal hard base, handwriting Pen, TF expansion these he has, performance is enough to meet the daily office is almost enough, and the combination of Lumia + Windows10 is simply perfect match.

2. Mobile phone exchanged in recent years

The earliest Dafas, or Sony Ericssons, had no characteristics, and the back cover of the film was still good at the time. Now it's a slimy feeling and abandoned it. Just entered the university, was forced to run the operator's mobile phone (must be bought before the phone to the Internet ah), 512 + 4G since then no love for Android.

Nokia Lumia 820 was the first flagship of the first generation of WP8.1, and it was also the first time to get a scholarship. Compared to 920, there was less optical image stabilization. The screen was A screen, but the expandable memory was still very important to me. of. (Say, this year, the so-called fruit 8, the so-called OLED, and the unknown NFC charging, I've been using it six years ago ...) Green is Lumia 535, was engaged in activities to send, mainly Still to experience WM10.

Keeping them is also a matter of thinking about yourself. After all, it was once brilliant. Now the main thing is the fruit 6S. When I first bought it, I originally wanted to add money to 6Sp, but I felt it was a bit difficult to hold 5 or 5 hands.

3. A mess of small objects

A. The Blue Devils' small speaker, when sent to me when I bought the Win10 tablet, can be Bluetooth, TF card, audio cable, high scalability, high value, nine recommended.

B. USB HUB

Originally still want to buy Orics, but unfortunately that section is out of stock, can only be the second best. The only drawback is the interface is 2.0, it is estimated that it is to charge the mobile phone it ... ... RGB light pollution sometimes really can not tolerate ah

Green Giant (llano) USB splitter USB hub laptop USB expansion multi-port COMBO HUB one with six card reader function HUB hub shine 29.9 yuan Jingdong to buy

C. Ethernet cable to USB

ORICO UTJ-U3 USB Splitter to RJ45 Gigabit Cable Adapter Converter External Network Hub Support Laptop/Tablet Computer Black 79 Yuan Jingdong To Buy

USB3.0 Gigabit Ethernet port, the solution is to solve the problem of small wireless transmission instability, test the chart below (speed limit 100M)

D. USB OTG card reader

SSK Biao Wang TF / micro usb flash memory card mobile computer tablet three with OTG multi-function card reader S60015.9 yuan cat to buy

This is mainly for me, because it feels more straightforward and convenient for him to feel the direct TF card transfer or OTG than the line transfer.

E. Philips' line plug, with sub-control, solid workmanship. High security (in fact, this is also a piece of paper)

Philips (PHILIPS) 4 Hole 1.8 Meter Strip Patch Panel Connection Board Energy-saving Fireproof Socket Children's Protection Door Socket Sub-control socket 37.9元 Jingdong To Buy

F. Mobile power at home is always available (previously several, but they are all similar)

Millet (MI) 20000 mAh Mobile Power 2/Bulk Charger Po Dual USB Output Bi-directional Fast Charge Polymer for Flat/Cell Phone etc. 149 yuan Jingdong to buy

G. Anti-radiation glasses, it will be really comfortable after you wear it. Students who are facing the computer all year round can try it.

BOMBARDIER Bombardier Challenger Neutral Black Frame Yellow Lens Goggles BR201603199 Yuan Jingdong To Buy

H, data retention

Western Digital (WD) Elements New Elements Series 2.5-inch USB3.0 Hard Drive 2TB (WDBU6Y0020BBK) 609 yuan Jingdong to buy

I will tell everyone that all of you living in neon are big sisters.~~~~

Millet (MI) sports Bluetooth headset black in-ear earbuds hanging ear wireless headset phone universal 149 yuan Jingdong to buy

I. Night party must-haves, ear-mounted type, even when I am strenuously exercising, I can guarantee not to fall off, but the battery is turned off at 30 percent. Therefore, if I use it heavily, it is recommended to charge one day.

Logitech K480 Multifunction Bluetooth Keyboard Black 199 yuan Jingdong to buy

J. Logitech's Bluetooth keyboard, also saw someone drying out before, but after all, can not be compared with the cable, the delay is still a little bit, about half a second. When I remember that I bought two and get one, I got one salted fish, one for my own use, one for my classmates and changed the speaker... I feel it's normal, but Bluetooth can connect three devices or it's fine, and the groove at the top can also put some mobile phones. , Tablet or something. , portability is still good, is too thick.

K. This one should all be familiar with it, (in fact, it is mainly to prevent the bear children from telling me that I am not going to come back and tell me anymore)

Finally, I finished my desktop, although my grandma's family's grandma can not be compared, but I think Sri Lanka is a bedroom but my dear ~ ~ ~ the final last, to everyone to see a thing of faith, do not know How many people guess it?

                   

Various of Puffs Disposable E-cigarette

Various of Puffs Disposable E-cigarette 

 

Zgar disposable electronic cigarette uses high-tech temperature control, food grade disposable pod device and high-quality material. A new design of gradient our disposable vape is impressive.

 

Our products include disposable e-cigarettes, rechargeable e-cigarettes,  rechargreable disposable vape pen, and various of flavors of cigarette cartridges.We have our own professional team and competitive quotations for any OEM or ODM works.  

  We supply OEM rechargeable disposable vape pen,OEM disposable electronic cigarette,ODM disposable vape pen,ODM disposable electronic cigarette,OEM/ODM vape pen e-cigarette,OEM/ODM atomizer device. 

 

Disposable E-cigarette, ODM disposable electronic cigarette vape pen atomizer device e-cig,OEM disposable electronic cigarette

Shenzhen WeiKa Technology Co.,Ltd. , https://www.zgarvape.com

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