First, create a new transparent layer, using the elliptical marquee tool to draw the following image (with the ALT key, draw the circle)
When drawing a circle, I suggest that you set the border style to a fixed value
Stroke after: Ellipse,
I configured the ACL Access Control List on routers and switches to prevent viruses and hacker attacks. After the configuration, network devices effectively prevent the shock wave attacks when many hosts do not have the corresponding
Texture skin color is not a step can be adjusted out, need to gradually strengthen the contrast of skin color, the dark and high light to strengthen, color pressure dark. When processing can use layer overlay or channel calculation to enhance
The production of the time as long as the attention of the high light part of the rendering, the local contrast to large. The more obvious the texture is.
This teaching introduces the method of making objects with stronger texture. The production of
and a founding member of Openpowerfoundation, so it is reasonable to use the BlueLink specification. TPU2 Panel Connection
The two connectors at the center of the front panel look like QSFP interfaces, with copper twisted-pair, not fiber. This supports two network configurations, 10Gbps Ethernet and 100Gbps Intel OPA connections respectively. Two 100Gbps Opa links can be merged to provide two-way 25gb/s ba
meet high-speed bandwidth needs, such as 10 GB Ethernet and 16 GB optical fiber channels.
The industry is upgrading the OM3 and OM4 light green optical fiber cables to 50 micron for long-distance connections. OM4 is ideal for horizontal cabling and inter-IDC cabling, whether for Ethernet or fiber channel.
"If you are using multimode optical fiber, you should purchase OM4," Martin said. "The reason why OM4 is recommended is that it can be used for both 40g and G Ethernet, but also for high-spe
), the minimum clearance is 4mil (0.10mm ). Buried holes, as the name suggests, are buried in the middle of the Plate Layer. They are only used for guidance purposes. blind holes, one exposed on the outside and one hidden on the inside, are usually used for guidance purposes only. Laser (laser) drilling, penetration thickness is less than or equal to 4.5mil, but is made out of a circular table hole. So don't try to use the laser drilling (laser) process to get through the pad. Via can barely be
. "Soil-type" twisted-pair wire connection, only applicable to the double stranded wire distance of not more than 70 meters, if the twisted pair is too long, you can use another twisted-pair repair method, the author will be described in detail below.
First, repair tools
The repair tool is naturally very simple due to the use of the most Earth method to repair twisted-pair wires. A mesh clamp, a roll of waterproof tape, a knife.
The traditional connection method of power cord
Description: Be
high energy density, the wavelength of the CO2 laser cannot be absorbed by copper, which severely limits its use range.In contrast, the output wavelength of an ultraviolet laser is less than 0.4 microns, which is suitable for processing polymer materials. Unlike infrared processing, the UV microprocessing process is not essentially a "hot" processing process. Most materials are easier to absorb ultraviolet light than infrared light. High-energy ultra
Differential line impedance models are similar to single-ended lines, with the biggest difference being that the differential line impedance model has one more parameter S1, the distance between the differential impedance lines (note the distance between the center points of the line).1.edge-coupled Surface microstrip 1 bScope of application:
The
differential impedance calculation of the outer barrier welding (pre-weld). This model is more commonly used than the following model, which
can we determine which combination?The more difficult the method is, the following are the general principles.(1) The signal layer should be adjacent to an inner electrical layer (internal power supply/formation), and the large copper film of the inner electrical layer should be used to shield the signal layer.(2) The internal power supply layer should be closely coupled with the formation, that is, the thickness of the medium between the internal po
Original Title: problems encountered in powerpcb
Reprinted from: http://www.emsym.com/blog/
Emsym angxin Technology
1. Questions about the virtual outer frame of the passing hole:
As shown in:
The outer frame refers to the gap between the via and other devices. The size can be set in design rule. The size of the isolation ring between the copper skin and the hole is the distance between the hole and the
The value of optical fiber networks is under review
With the popularization and application of high-definition TV, 4G technology, and high-speed transmission network information, the traditional Integrated Wiring technology environment has been overturned. In addition, in the context of high bandwidth acceleration, telecom operators began to gradually push forward copper to the FTTH optical fiber access mode. But at the same time, operators are also
ArticleDirectory
10 C
20 C
30 C
Copper
Trace width
Maximum current amps
Inch
Mm
Relationship between PCB width and current Reprinted from: http://www.dianyuan.com/article/207334, calculation method is as follows:
First, calculate the cross-sectional area of the track. The thickness of most PCB copper foil is 35um (if you are not sure, you can ask the PCB manufactu
Recently, the CCTV's economy and law exposed Baidu Phoenix nest auction false site flooding, the more money will be able to rank the more forward. Dongguan Tidal SEO Studios do not want to comment here. Only a small section of the show, a Beijing copper door and window company received a phone call Baidu company, said advertising costs 2000 yuan a day was the point of the end of this section caused by tidal SEO attention. Because their main product is
Cabling planning for the tobacco industry
2.3.1 Core layer CD, Convergence layer BD weak device planning
The core CD room needs to be terminated from the aggregation room, operator access network and tobacco system in the introduction of various types of optical fiber, optical fiber core number, in the CD room should be based on the specific number of optical fiber and cabinet installation space, select suitable for the project needs of the fiber-optic fusion wiring rack products, such
, there will be uncertainty in future promotion, however, the point-to-point passive network structure is not suitable for high-density residential area applications in China. Moreover, EPON and GPON related devices require at least five years of standardization and maturity, in the next five years, it will be difficult to compete with the current cost and popularity of Ethernet P2P devices. At present, optoelectronic devices are far from meeting the requirements of low-cost PON systems. It can
or GPON will inevitably bring huge technical risks. In the access network, replacement of optical fiber cables with copper cables is an inevitable trend. However, overnight replacement of optical fiber cables with copper cables is impossible for all businesses to access through optical fiber cables. The progress and application of any technology are gradual, and FTTH is no exception. Therefore, in the earl
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