Taiwan Announced a Ban on the Sale of Semiconductor Equipment to Jinhua

Taiwan semiconductor equipment can no longer be sold to Jinhua

Regarding the US Department of Commerce's "adding Fujian Jinhua integrated circuit Co., Ltd. to the entity list", Shen Rongjin, the "economic minister" of the Taiwan authorities, said yesterday (31) afternoon that at present, Jinhua cooperates with liandian to provide some equipment, which is produced in Taiwan. Since the US Department of Commerce has issued a ban, "it can't go out".

Fujian Jinhua, a DRAM plant in mainland China, has been listed as an export control entity by the U.S. Department of Commerce, so that Taiwan liandian, which works closely with Jinhua, also bears the brunt. Liandian pointed out on the 31st that it would suspend providing R & D assistance to Fujian Jinhua!

China's Ministry of Commerce's response to Fujian jinhuaai sanctions

On October 30, a spokesman for the Chinese Ministry of Commerce issued a statement on the 30th urging the United States to immediately stop its erroneous practices in response to the United States' inclusion of Fujian Jinhua integrated circuit Co., Ltd. in the "entity list" of export control.

The spokesman said that China opposes the United States' generalization of the concept of national security, the abuse of export control measures, the implementation of unilateral sanctions by the United States and the interference of enterprises in normal international trade and cooperation.

The spokesman said that China urges the United States to take measures to immediately stop wrong practices, facilitate and promote normal trade and cooperation between enterprises of both sides, and safeguard the legitimate rights and interests of enterprises of both sides.

Taiwan Announced a Ban on the Sale of Semiconductor Equipment to Jinhua 1

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Worried About the Low Efficiency of Video Conversion, Come and Try This Super Fast Batch Conversion
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Accelerate Equipment Development and Debugging by Using the Capturevu Function of Wfm7100
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Murphy's law tells us that "if something can go wrong, it will go wrong". In the process of testing or production of video equipment, problems are often the last time we think of problems and the most inconvenient time to solve them. Among them, video problems in digital domain often occur randomly, so it is the most difficult to judge and isolate. Therefore, when solving such problems, video monitoring and measuring equipment that can detect the error state in video signal is essential. The latest waveform monitor of Tektronix with capturevu function can capture a complete video frame in case of video signal error and save it to the internal memory of the instrument.Users can manually capture video data through menu options, or let the instrument automatically capture a video frame when any video error listed in Table 1 is found. 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Google Services Are Largely Paralyzed, and Smart Home Devices Are Not Immune
Google Services Are Largely Paralyzed, and Smart Home Devices Are Not Immune
On the evening of December 14, Google services were largely paralyzed. Almost all Google services, including Gmail email, Google maps and video website youtube, were paralyzed, and this state lasted at least more than an hour.Google home, a smart home device launched by Google, was not spared.It is understood that the Google service paralysis affects China, the United States, Europe, Canada, India, Australia and other countries or regions. Due to the huge scope of Google's services, the nearly one hour service interruption has had a great impact on people all over the world.Among them, for those users who used Google home, a Google smart home device, the paralysis of Google services last night made them spend 45 minutes with a dark room without lights. Because these users can't even give a simple command to Google home to "turn on the light".A user from the UK complained on social media that connecting all the lights in his home to Google home devices seemed like a fatal mistake. Coincidentally, an Australian user also said, "thanks to Google, I can't even turn on the bedroom light now".It is reported that during this period, Google smart home services, including Google home smart speakers, nest thermostats, smoke alarms and surveillance cameras, can only operate in a safe mode under failure, and users cannot access services or change settings through applications.Google home intelligent voice assistantIn fact, this is the third outage of Google this year. On September 25, Google staged a global outage. Further ahead, on June 2 US Eastern time, many Google services based on Google Cloud Architecture Services also suffered large-scale outages around the world, with downtime of nearly 4 hours.In addition to Google, other technology giants have had similar situations many times. Last month, Amazon's cloud service suffered several hours of failure, leading to the collapse of some websites and service systems; Microsoft cloud service has also experienced a wide range of global downtime events.What is the cost of paralysis? Perhaps no one knows the exact answer. But for the current momentum of the smart home, there is no doubt that it is covered with a cloud.In fact, the smart home technology developed by Google, Amazon and other technology companies has always caused a lot of controversy in recent years.It was previously reported that these smart home devices sometimes make a sudden sound and operate automatically at night, which makes users afraid. Moreover, people are also worried that these smart devices will automatically record conversations at home and send such private information to others.After experiencing the paralysis of Google services last night, a considerable number of users around the world are strongly aware that they are now highly dependent on online services, so that once they leave these services or technologies, it is difficult for them to live normally.
Purchasing Skills of Video Booth in Multimedia Classroom
Purchasing Skills of Video Booth in Multimedia Classroom
Purchasing skills of video booth in Multimedia ClassroomVideo booth, also known as physical exhibition booth, is one of the indispensable teaching equipment in multimedia classroom. It is a new type of image acquisition equipment. The video booth is connected with the projector. Teachers can use it to clearly and realistically display various slides, models, transparencies, manuscripts and other objects on the projection screen through the video camera, so as to optimize the teaching process, increase the classroom capacity, improve the classroom teaching efficiency and improve the teaching effect.For the purchase of video booth, we can start from the following three aspects:1. Choose your own video boothThe product performance requirements are determined according to the user's own use environment and procurement budget. If you want to pursue high-quality projection demonstration effect, the double side lamp desktop video booth should be an ideal choice. If you want to make the working position of the video booth not fixed, you can choose the bottom plate separated video booth. This type of product is due to the separation of the bottom plate, It can enhance the portability of the video display desk. It is very suitable for small-scale mobile. If users want to use the video display desk on business, they should choose portable products. Of course, the price of this product is very expensive.2. Determine key technical indicatorsWhen purchasing a video booth, in addition to the resolution of CCD (charge coupled device), we should also refer to some other functions and indicators, such as positive and negative film inversion, black-and-white color inversion, the quantity and quality of auxiliary light source, the number of input and output ports, whether it has RS-232C serial port, whether it has infrared remote control function, etc., and refer to the opinions of other users, Focus on selecting several products for the actual comparative test of product performance in the next stage. 3. Comprehensive comparisonThe work at this stage is particularly important, which can effectively compare the actual performance of the product, so as to determine the final product selection. 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In fact, the performance indicators of the video booth are not many. As long as you grasp several important links and follow the pre planning, you can be smart when purchasing the video booth.Devices we should pay attention to before purchasing:◇ CCD cameraCCD camera is the core component of video booth, which determines the quality of imaging; At present, more than 90% of CCDs in the world are produced by large companies: Samsung, Sony, Panasonic and JVC; Most of the CCD products from other countries and domestic video booths are also imported or assembled from Japan. CCD with poor quality will have color deviation and uneven imaging or focusing.◇ digital processing circuit: ensure signal clarity, color detail restoration and image stabilityAfter the image signal is collected by CCD and output to other external equipment, there is still a lot of signal processing, which also plays a very important role in the final imaging quality. Because this part of the circuit is invisible from the outside, many low-quality booths save costs from this part, resulting in serious image jitter and flicker and poor color restoration; The circuit of imported products such as JVC is complex, and high-grade components are selected to ensure the signal clarity, excellent color detail restoration and image stability.◇ mold process: determine the reliability and longer service life of the boothHigh quality mold technology brings high reliability and longer service life to the booth. For example, due to mass production of JVC products, the mold technology level is extremely excellent; Many inferior booths are similar to small workshops, and the mold process level is low, which seriously affects the service life of products.◇ control panel design: it gives users great convenienceFor example, the control panel of JVC is designed through the questionnaire survey of global users, which is in line with users' usage habits and ergonomics to the greatest extent. Touch button, waterproof and dustproof, suitable for all kinds of harsh use environment.Suggestions on general procurement process of video booth:1. Clarify requirementsAccording to the user's own use environment and purchase budget, first consider using analog products or digital products. At present, almost all digital products are imported products in the market, and the price is basically more than 20000 yuan; The products with relatively good simulation products are mostly imported products, with a selling price of more than 10000 yuan2. Price positioningFormulate the price range according to the previous demand; According to the above price range, products are widely selected for performance and parameter comparison.3. Equipment selectionOn the basis of the above equipment selection and referring to some literature and the opinions of other users, several products are selected to carry out the actual comparative test of product performance in the next stage4. Comprehensive comparisonThe work at this stage is particularly important, which can effectively compare the actual performance of the product, so as to determine the final product selection. In this stage of comparison, we should focus on the detailed comparison and evaluation of the product's true restoration of color, the uniformity of lens focus (whether the center and edge are consistent), the accuracy of automatic focus, lens contour correction and pillow distortion; It is recommended to use professional test cards at this stage.For the reliability and stability of product quality, we should refer to the opinions of other users, experienced engineers and technicians, product price and other factors as much as possible. After all, every penny is worth every penny in product sales.For the above processes, users can also cross cycle to select the final products that meet the use needs and use stable and reliable products.
Storage System and RAID Level Application of Video Surveillance
Storage System and RAID Level Application of Video Surveillance
Over the years, with the gradual transition from analog content to digital content, a new video surveillance application mode came into being. The enterprise security team and information technology team need to continuously strengthen cooperation to jointly design solutions that can meet more complex requirements. For example, although about 95% of video surveillance I / O operations are write operations, most enterprise storage systems are designed to speed up the read speed, and the write speed is often restricted by data protection factors.Writing applications are different from traditional read / write systems in terms of specifications. First, the degree of risk associated with video loss is the most important determinant that customers of such storage applications need to consider. Other factors of concern include storage capacity, resolution and data protection.The choice of RAID level depends largely on the final priority of the above factors. In order to get the best storage solution, we need a comprehensive and in-depth understanding of the customer's level and the available budget size.Source: PELCO technical white paper: improving the reliability of video surveillance storage system while reducing costsHigh end applicationsHigh end applications need to run around the clock. The risk caused by the loss of video clips is very high. Institutions using high-end applications (airports, prisons, etc.) often need to meet strict specification requirements to ensure that the data is intact. Large storage capacity requirements are critical because petabytes rather than gigabytes of data often need to be stored for a long time. The number of video streams is also high. For example, a system with 100 cameras can generate more than 30 TB of data per week. High end applications usually require the highest possible resolution, so the bit rate is also high. In addition, since content is difficult to copy once lost, protecting hard disk data is crucial regardless of the cost. Another factor to consider in such an environment is that the storage system must be able to save video streams in any array situation, which also includes ensuring a minimum performance level in degraded mode or during reconstruction.Raid 6 is the best choice to ensure 24x7 operation. Its dual parity protection can cope with dual drive failures, and allows administrators to have enough time to replace failed drives before data is damaged.Mid tier applicationsFor organizations adopting mid tier applications (enterprises, schools, etc.), the risk of video stream capture failure is relatively low, but there is still a high capacity demand to meet the requirements of on-demand archiving and reference video clips. The requirements for data quality may vary, some may require higher resolution, while others only need to meet lower video quality. It is still very important to avoid data protection and drive failure, but the difference from high-end applications is that middle-end applications can accept a small amount of frame loss when rebuilding the array. Of course, this phenomenon should be avoided as much as possible.If the archiving requirements need to support high data availability, raid 6 will be the best choice for customers. If the customer has enough it personnel on site to replace the drive, or does not necessarily have to ensure long-term 24x7 operation, RAID 5 is more applicable, which helps to obtain higher net storage capacity than raid 6.Low end applicationLow end products mainly consider the cost. Even if the frame is lost, there is no great risk, and it can be rewritten every day. Therefore, the capacity requirement is low. Organizations using this low-end application (retailers, small offices, etc.) can use images with low resolution, and do not need to care about data protection in case of drive failure.RAID 0 is the lowest cost RAID level, which can achieve the highest performance with the least number of drives and provide the maximum net storage capacity for the system. However, if one of your drives fails, using RAID 0 will result in data loss. If the customer needs data protection function but the budget is tight, other levels such as RAID 10 or 5 can be considered.Select the appropriate RAID levelAccording to the above analysis, we can see that high-end applications need to ensure 24x7 operation, and raid 6 is the best RAID technology that can meet the high availability requirements. Midrange applications have different specification requirements, so RAID 5 is usually a good choice. For most cost sensitive low-end applications, RAID 0 is an appropriate choice worth considering, especially when daily rewriting is allowed. If you need data protection technology, you can choose RAID 5 and 10.LSI 6GB / s SATA SAS configuration and test resultsIn order to help users select the components of the customer's video surveillance application, LSI has configured and conducted some tests to show how to obtain the ideal performance level, which can be used as a reference for users when considering storage solutions.system configuration• ultramicro x8dtl-6f server• dual Xeon CPUs• 2x2GB DRAM• Microsoft Windows Server 2003 Enterprise EdiTIon、Service Pack 2• LSI 3ware 9750-8e (driver version 5.01.00.016, firmware version fh9x 5.12.00.006)• LSI 620j connects to two X4 multi wire cables with 6GB extender backplane• 24 Seagate 6GB SAS drives (model: st973352ss)Test configuration• the queue depth of each worker using iometer is 1• 256 KB stripe• 100% sequential write• write cache supports best results for each raid type (wt / WB)• RAID 0、RAID 5、RAID 6• running time 2 minutes• ramp rise time 30 seconds
What Are the Common Preheating Methods of Wave Soldering Equipment?
What Are the Common Preheating Methods of Wave Soldering Equipment?
Nowadays, SMT chip manufacturers use wave soldering equipment widely, but many people still don't understand the use process of wave soldering equipment. What preheating methods are there?After the PCB circuit board enters the wave soldering machine through the conveyor belt, it will pass through some form of flux coating device, where the flux is spread to the circuit by wave crest, foaming or spraying. Because most flux must reach and maintain an activation temperature during welding to ensure the complete infiltration of solder joints, Therefore, the circuit board must pass through a preheating zone before entering the wave crest groove.At present, the wave soldering machine is basically preheated by thermal radiation. The most commonly used wave soldering preheating methods include forced hot air convection, electric heating plate convection, electric heating rod heating and infrared heating. Among these methods, forced heat convection is generally considered to be the most effective heat transfer method of wave soldering machine in most processes. After preheating, the circuit board uses a single wave( λ Wave) or double wave (turbulence wave and λ Wave) welding. For perforated components, a single wave is enough. When the circuit board enters the wave ridge, the direction of solder flow is opposite to that of the board, which can generate eddy currents around the component pins. This is like a washing play, removing all the residues of flux and oxide film on it, and forming wetting when the solder joint reaches the wetting temperature.Preheating after flux coating can gradually increase the temperature of PCB and activate flux, which can also reduce the thermal shock when the small assembly enters the pollution peak. It can also be used to evaporate all the moisture that may be absorbed or the carrier solvent that dilutes the flux. If these things are not removed, they will boil when passing the wave peak and cause tin sputtering, or form steam to stay in the solder to form hollow solder joints or sand holes. In addition, due to the large heat capacity of double-sided panels and multi-layer panels, they need higher preheating temperature than single panels.For mixed technology assemblies, generally λ The wavefront also uses a disturbing wave. This wave is relatively narrow and has a high vertical pressure when disturbed, which can make the solder penetrate well between the tightly placed pin and the surface mount element (SMD) pad, and then λ The wave completes the forming of the solder joint. Before any qualification of future equipment and suppliers, all technical specifications of plates welded with wave crest need to be determined, because these can determine the performance of the required machine.Recommended reading: http://m.elecfans.com/article/720040.html
What Audio and Video Codec Technologies Will Be Used in the Development of Video App
What Audio and Video Codec Technologies Will Be Used in the Development of Video App
(source: clouded leopard live broadcasting system)If you want to develop a video app for live broadcasting, as a developer, you must first understand its technical architecture. A complete live broadcasting technology architecture includes: audio and video acquisition, preprocessing, encoding and decoding, multimedia processing, streaming media protocol, system architecture of video app, CDN technology and interaction technology, etc. From today on, Xiaobian will break down the live broadcast technology architecture and explain the projects involved one by one. It can also be regarded as providing some simple knowledge support to developers who are new to the industry.First of all, let's talk about the audio and video codec technologies used in the development of video app?Video codec technology is the initial development condition of IPTV. Only efficient video coding can ensure the provision of high-quality video services in the Internet environment (such as live broadcast we like to see). The essence of video coding is to reduce image redundancy, and the premise of reducing redundancy is to compress the video. The amount of data of uncompressed digital video is huge, which is difficult to transmit or store. Therefore, selecting the appropriate video coding can greatly improve the video transmission efficiency.The principle of audio codec and video codec is similar, and it is transmitted by compressing audio. There are three common implementation schemes for audio codec. The first is to use a special audio chip to collect and process speech signals, such as MP3 codec chip, speech synthesis analysis chip and so on. The second scheme is to use a / D acquisition card and computer to form a hardware platform, and the audio codec algorithm is realized by the software on the computer. The third is to use high-precision and high-speed A / D acquisition chip to complete the acquisition of voice signals. Considering the above three schemes, the third scheme is recommended as the first choice.In the development process of video app, whether audio or video, there are two ways to encode and decode it, one is software coding, the other is hardware coding, both of which have their own advantages and disadvantages. Software coding is basically introduced in the article. Its advantage is that it is more flexible and can be customized according to needs, but its disadvantage is that the speed is relatively slow. If the API provided by the hardware chip manufacturer is used for encoding and decoding, these encoding and decoding have been integrated into the bottom of the hardware. The advantage is fast, but the disadvantage is that the hardware is related to the platform and is not flexible enough.In fact, this one mainly involves the issue of digital copyright. Now many live broadcasting platforms have added video caching function, and some videos can only be viewed after paying. Therefore, in order to prevent users from transmitting after downloading video, audio and video should be encrypted. The commonly used encryption algorithms are des encryption, or exclusive or operation on only a few bytes in the transport stream and their subscripts.
Think Green Collection: Editors Choice  10 Best Images
Think Green Collection: Editors Choice 10 Best Images
Today weve chosen Pixabay 10 best green color images. Enjoy the green choice of our team.Green is the color of nature. It is associated with growth, harmony, freshness, and fertility. Green has strong emotional correspondence with safety. Dark green is also commonly associated with money.There lots of shades of green, natural and man-made. Check them all in our collection!Image by ju1959jjjGreen is the prime color of the world, and that from which its loveliness arises. Pedro Calderon de la Barca Image by SkitterphotoI just need green. I need to wake up and see grass and squirrels. I dont want to see skyscrapers. Andre Leon Talley Image by cegohI always say that candy is the perfect studio food it keeps your energy going. Nick Cannon Image by jeonsangoI believe a leaf of grass is no less than the journey-work of the stars. Walt Whitman Image by Free-PhotosIf there is a future, it will be Green. Petra Kelly Image by cocoparisienneDont be a fish; be a frog. Swim in the water and jump when you hit ground. Kim Young-ha Image by ulleoColorless green ideas sleep furiously. Noam Chomsky Image by jplenioFor in the true nature of things, if we rightly consider, every green tree is far more glorious than if it were made of gold and silver. Martin Luther Image by NietjuhWhen youre green, your growing. Ray Kroc Image by SkitterphotoNo object is mysterious. The mystery is your eye. Elizabeth Bowen All images and videos on Pixabay are released free of copyrights under Creative Commons CC0. You may download, modify, distribute, and use them royalty free for anything you like, even in commercial applications. Attribution is not required·RELATED QUESTIONI painted my bedroom a dark teal color and need some suggestions on color of bed set or accent colors?Turquoise or white would look great with teal
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