No C结构规模巨大,内部电路互连非常复杂,No C内部串扰严重影响了片上系统的信号完整性。基于改进HT模型提出一种串扰测试的方法,实验结果表明,在改进的HT模型来中,N根传输线传统串扰测试方法需要测试6N次,而此方法只需要18次,从而有效...No C结构规模巨大,内部电路互连非常复杂,No C内部串扰严重影响了片上系统的信号完整性。基于改进HT模型提出一种串扰测试的方法,实验结果表明,在改进的HT模型来中,N根传输线传统串扰测试方法需要测试6N次,而此方法只需要18次,从而有效地减小了开销。基于改进的HT故障种类模型设计了一套基于改进HT模型的测试代码,根据测试代码利用Pspice仿真软件设计了一种测试代码电路,该测试电路是利用16位数据选择器和16进制计数器构成,并对测试电路进行仿真测试,测试结果表明该电路能够满足测试要求并且具有可移植的优点。展开更多
The influence of air pressure on mechanical effect of laser plasma shock wave in a vacuum chamber produced by a Nd：YAG laser has been studied. The laser pulses with pulse width of 10ns and pulse energy of about 320mJ...The influence of air pressure on mechanical effect of laser plasma shock wave in a vacuum chamber produced by a Nd：YAG laser has been studied. The laser pulses with pulse width of 10ns and pulse energy of about 320mJ at 1.06μm wavelength is focused on the aluminium target mounted on a ballistic pendulum, and the air pressure in the chamber changes from 2.8 × 10^ 3 to 1.01 × 10^5pa. The experimental results show that the impulse coupling coefficient changes as the air pressure and the distance of the target from focus change. The mechanical effects of the plasma shock wave on the target are analysed at different distances from focus and the air pressure.展开更多
基金Project supported by the National Natural Science Foundation of China （Grant No 60578015）.
文摘The influence of air pressure on mechanical effect of laser plasma shock wave in a vacuum chamber produced by a Nd：YAG laser has been studied. The laser pulses with pulse width of 10ns and pulse energy of about 320mJ at 1.06μm wavelength is focused on the aluminium target mounted on a ballistic pendulum, and the air pressure in the chamber changes from 2.8 × 10^ 3 to 1.01 × 10^5pa. The experimental results show that the impulse coupling coefficient changes as the air pressure and the distance of the target from focus change. The mechanical effects of the plasma shock wave on the target are analysed at different distances from focus and the air pressure.
