逍遥右脑 2018-09-20 12:32
18. The used microstrip interconnects have the following characteristics: various characteristic impedance, length, dielectric thickness and relative dielectric permittivity. The used other kinds of transmission lines are chosen to achieve the comparison: grounded co-planar waveguides, striplines, coated-microstriplines. The analysis is mainly based on experiment measures which incorporated 3D full-wave EM simulation in frequency and time domain. Then the differential microstrip line and stripline will be analyzed on signal integrity by used mixed-mode S-parameters based on 3D EM simulation in frequency domain.3. Various discontinuities in high-speed interconnects will be analyzed on signal integrity.
主要基于实验研究，并结合三维全波电磁仿真软件在频域和时域对高速互连中常见的不同特性阻抗、长度、PCB板厚度、PCB板介电常数的微带互连线以及不同类型的传输线，如：接地共面波导、带状线和嵌入式微带线的信号完整性性能进行分析，并对接地共面波导的谐振现象和传输特性进行了详细的理论分析；然后采用混合模S参数的理论对高速互连中常用的差分微带线和差分带状线的信号完整性性能进行频域的仿真分析。3。
19. In order to reduce the expend of the development of TV guidance bomb, it refits the servo actuators of some missile for the servo actuators of the pitching loop and the yawing loop, and then, it tests the characteristic of the actuators and makes the actuators satisfy the basic requests; for the tumbling loop, the servo actuator adopts three-position relay control fashion to make the loop be stable by using the relay control circuit, the three-position and five-passage valve and the gas amplification device.
为了降低电视制导炸弹的成本，对于俯仰、偏航稳定回路，采用某型号导弹的舵机进行改装，并对改装后的舵机的特性进行测试，使舵回路达到一定要求；对于滚转稳定回路，采用三位置继电控制舵，通过继电放大器、三位五通阀和气动放大器来控制舵面的偏转，以此来实现滚转稳定。
20. This copper aluminum tube welding process process and the characteristic, the welding process process decomposition will be 6 movements, contains the movement is the translation, according to the copper aluminum tube welding machine's practical work demand, analyzes electric circuit's principle of work, designs the PLC peripheral circuit, based on this, designs the complete control procedure, and carries on the simulation debugging.
本铜铝管焊接工艺过程及其特点，将焊接工艺过程分解为6个动作，其中包含的运动均为直线运动，根据铜铝管焊机的实际工作需求，分析电路的工作原理，设计PLC外围电路，在此基础上，设计完整的控制程序，并进行模拟调试。
1. be characteristic of的解释
1. The civilization of a nation can be seen in all areas, each bearing the unique characteristic of the nation.
2. But instead of arrows, visitors will be bombarded with my favorite " Chinese characteristic ".
3. Since the end of March, 13 characteristic streets started to be constructed.
4. These characteristic performances are likely to be held in 37 venues to ensure that most of the audiences can have a chance to watch.