Analyses and researches the 2 channel voltage source ' s functional and characteristic requirements of the experiment system of the acoustic current transport model in the quasi - 1d electron channel . 2 . designed and realized the hardware circuit of the 2 channel voltage source 两路高精度高稳定度馈源在进行准一维电子通道量子化声电流输运实验的中得到了很好的使用效果,在国内首次观察到了在甚低温下准一维电子通道的电导量子化现象。
It is a cost effective solution for voip trunk gateway as well as high quality , reliable and full functions to meet customer requirements . the idac system a premise - based pop provides cost - effective high - performance access to clients in concentrated locations such as office buildings , apartment houses and hotels 提供了高品质的voip网关功能，其符合itut h . 323 v3标准，并提供了web远程管理snmp网管及cdr等功能，为一完整且高稳定度之局用界接设备。
Now studying satellite attitude control subsystem with high precision and high . stability is the key technology of modern small satellite , which has received increased domestic and overseas attention , and it is also the promise and basis on which all kinds of space exploration , space exploitation and other space missions can be realized 高精度高稳定度的卫星姿态控制系统作为现代小卫星的关键技术，业已受到国内外的广泛关注，它也是实现卫星所担负的各种探测、开发和空间任务的重要保证。
