1) time service simulator
授时模拟源
1.
The carrier wave produced by AD9852 simplifies the design of BPM time service simulator and satisfies with the demands of BPM time service simulator.
基于直接数字频率合成(DDS)技术的美国AD公司生产的高集成度频率合成器AD9852在频率综合、时钟产生、测试与测量设备和射频激励器方面有着广泛的应用,采用ad9852产生的BPM载频产生简化了授时模拟源设计,并很好地满足了短波授时模拟源对载频的性能要求。
2) passive timing
无源授时
1.
Algorithm of GEO satellite ephemeris in Beidou passive timing user receiver;
北斗无源授时用户接收机中GEO卫星星历求解算法
3) GPS timing module
GPS授时模块
4) sound source modeling
声源模拟
1.
A sound source modeling method is provided to set point source spaces and total distance during noise prediction of running trains, so to resolve an important technical problem of noise prediction in environmental impact assessment.
根据声学基本理论分析了采用3种指向特性的系列点声源,模拟铁路噪声线声源的误差问题,论证了点源模拟误差和长度模拟误差与各种影响参数的定量关系,给出声源模拟法预测铁路列车运行噪声中确定系列点声源的点源间距和总长的方法,解决了铁路建设项目环境影响评价中铁路噪声预测的一个重要技术问题。
5) homology modeling
同源模拟
1.
Homology modeling was completed at Internet using SWISS MODEL and the structure was viewed with SwissPDBviewer programs.
应用SWISS MODEL软件对该蛋白进行了同源模
6) Simulation source
模拟源
1.
This paper introduces a concreted design scheme of pulse simulation source which is completed by 80C196KB single chip to control 8254 counter and CPLD to realize channel choice and set frequency and counter value arbitrarily,the principle of alterable pulse number and frequency which are generated by 8254 concatenation is expounded emphatically.
首先介绍由80C196KB单片机控制8254计数器和CPLD进行通道选择、频率和计数值任意设定的脉冲模拟源的具体设计方案,重点介绍由8254计数器级联产生可变脉冲个数与频率的原理,并对通道的控制选择与脉宽的调制做简单说明。
补充资料：授时
1.谓记录天时以告民。后以称颁行历书。语本《书．尧典》:"历象日月星辰，敬授人时。"孔传:"敬记天时以授人也。"
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条