This article describes how to lay copper in pads.
Step 1: determine the area where copper is to be laid. Click "copper pour" and Right-click the drawing tool to select the drawing mode. The mode can be a rectangle, circle, path, etc. Note that the pre-lay copper area must be closed.
Step 2: Set
The world's copper market is expected to see the largest supply and demand gap in seven years, Morgan Stanley quoted icsg in a report on Monday.The supply and demand gap in the world's copper market from 1 to 5 months is 466,000 tons, while in the same period of 2013, the supply surplus was 250,000 tons.Copper is expected to have a supply and demand gap of 90,000 tons this year.According to data released by
The UTP and unshielded FTP for category 5 and Category 6 copper cables have already reached a consensus in the industry. After the promulgation of the 10GBase-T standard, the battle for shielding and unblocking 10g copper cables is now in front of us. When more and more 10g copper cable products are available and more mature, are they shielded or unshielded?
Deba
1. photoelectric signal conversion method
For a long time, people have been using copper wires to transmit sound and information. However, more and more fiber cables have been used recently. Due to cost problems, we cannot replace all copper wires with optical fiber cables at once. However, to convert some cables into optical signals, the most important thing is to convert the electrical signals into optic
The data structure is probably like this {code ...} the sorting rule is: First compare to the gold medal, the gold medal is consistent than the silver medal, the silver medal is consistent than the bronze medal, the bronze medal is consistent than the id, the id is the initial array number score three numbers represent the gold, respectively, the number of silver and copper requires less built-in functions. it is best to use php... the data structure
First priority rules:
The Inpolygon, Second object = AllSecond priority rule:The ' object = All ', Second object = All
Enter the design-> Rules-> clearance project. Select the matching criteria for the first object. None of the existing conditions were Polygon, and enteredQuery Builder. Found that there is an Object Kind is in the matching criteria, and there is a Poly in the right-hand list. Click OK after this setting to generate full QueryThe content is Ispolygon. So the spacing between the
The structure of the data is probably like this
$arr = [ ['name'=>'国家一','score'=>[10,7,5]], ['name'=>'国家二','score'=>[10,9,5]], ['name'=>'国家三','score'=>[11,7,5]], ['name'=>'国家四','score'=>[10,7,9]], ];
The rule of sorting is that the first is better than the gold medal, the gold medal is more consistent than the bronze, the bronze is consistent than the Id,id is the initial array ordinal
The three numbers in the score represent gold, silver, and
At the plenary meeting of the Institute of Electrical and Electronics Engineers (IEEE) 802.3, IEEE approved a new generation of BASE-T interest solicitation request (CFI ).
The next generation of BASE-T will enter the stage of the standard development research team, the future direction of research and development is to balance the twisted pair copper cabling to reach at least 40g or even G Ethernet speed (GbE ), this approval is the first important m
1. photoelectric signal conversion method
For a long time, people have been using copper wires to transmit sound and information. However, more and more fiber cables have been used recently. Due to cost problems, we cannot replace all copper wires with optical fiber cables at once. However, to convert some cables into optical signals, the most important thing is to convert the electrical signals into optic
1. photoelectric signal conversion methodFor a long time, people have been using copper wires to transmit sound and information. However, more and more fiber cables have been used recently. Due to cost problems, we cannot replace all copper wires with optical fiber cables at once. However, to convert some cables into optical signals, the most important thing is to convert the electrical signals into optical
Transferred from: https://lvwenhan.com/%E6%93%8D%E4%BD%9C%E7%B3%BB%E7%BB%9F/485.html?hmsr=toutiao.ioutm_medium= Toutiao.ioutm_source=toutiao.ioWriting goalsThis article is intended for many "application software engineers" in the Chinese Internet, specifically, for Web back-end engineers (Java, PHP), Web front-end engineers, Mobile development Engineers (IOS, Android). This article will start from the copper wire, all the way to the HTTP, for everyone
1, Photoelectric signal conversion method
For a long time, people have been using copper wire for the transmission of sound and information. However, more and more recently, fiber-optic cabling has begun to be used. Because of the cost, it is not possible to switch all copper wire into optical fiber all of a sudden. But if you want to convert some of the cables into light signals, the most important thing i
Regardless of the final minimum copper platform, the complexity of the encoding system is a major obstacle for source equipment manufacturers. For cable and connector personnel and physical layer equipment installers, the question is more about what restrictions will this bring to the cabling facilities and what installation and test parameters will be required.
The Working Group has made a lot of discussions to solve the problem of external crosstalk
Recently, the same-quality carbon nano-optical fiber can carry more current than copper cables, according to the latest research from the US site University. The current transfer capability of individual nanotubes is 1000 times that of copper. However, the ability to merge nanotubes into optical fibers using other technologies cannot be achieved.
However, a series of experiments show that the carbon nanotu
Use Photoshop to depict the detailed steps of a copper-etched text. The steps are simple, but the results are great. You'll use Photoshop's bevel and embossed layer effects, layer overlays, and a combination of many different techniques to make text and background seamless.
The finished effect is as follows.
Copper is a great metal. It's tough but highly malleable. In addition,
A young man grabbed a mouse and sold it to the drug store. He got a copper coin.He walked over the garden and heard the Flowers say that he was thirsty, and he had another idea. He bought a little syrup with the copper coin and gave it to the flowers. When the flowers drank water, one of them gave him a bunch of flowers. He sold the flowers at the market and got eight c
Nano-optical cables that can replace computer copper wires will be available
Following the invention of the optical fiber technology that revolutionizes data transmission speed and capacity, the University of Alberta's electronic engineers broke another obstacle and recently successfully designed nano-optical cables that can replace copper wires in computer chips, it can significantly increase the comput
In the morning in the Usaco month of the copper, t1t2 is used to kill, but T3 card a morning, the following to the topic:Test instructions is probably the input of a n*n matrix, the matrix element only 0 and 12 states, each operation with the top left corner of a matrix in the upper left vertex of a matrix, the matrix of all elements of the state change (that is, 0 to 1, 1 to 0), the matrix of the elements all become 0 the minimum number of times.The
The system's default normal spacing is the system's clearance (10MIL), but the default common out of the word spacing is too small, so you can create a common rule, but pay attention to your established copper-laying rules priority is always before the default priority (such as your polygon The clearance priority is 1, so the default clearance priority is 2, as is the case when other rules are established. There are other
between each pair cannot be too large (less than 0.1 ohm). Otherwise, it indicates poor contact and the connection point must be checked.
6. transmission Delay Propagation Delay) and Delay deviation Delay Skew)
The appendix to the TIA/EIA568A-1 added in 1997 contains the specification for transmission latency and latency deviation. According to various IEEE network transmission standards, the maximum latency for network transmission cannot exceed 570ns, this requires that the test of the Integr
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