1) Prevention of sexual HIV transmission
性传播预防
2) prevention of the germs spread
病菌传播预防
5) Preventive Cyclic Retransmission PCR
预防性循环重传
6) propagation prediction
传播预测
1.
Accurate and fast propagation prediction method for urban microcellular systems;
城市微蜂窝的快捷精确传播预测方法
2.
Ray tracing is a useful tool for propagation prediction By using features of reflection and refraction by objects of building,a patched model combined with ray tracing technique is presented The accuracy of prediction has been improved The software that can give the path loss of any site inside the building has also been developed Results of calculation agree well with measuremen
本文在介绍了电波传播预测的射线跟踪法 ,根据建筑物体对电波的反射和透射的特点 ,结合射线跟踪法 ,提出了一种室内物体的分块模型 ,设计了射线跟踪的递归算法 ,根据这一方法可以计算出当发射点在室外而接收点在室内时室内各处电波传播的路径损耗。
3.
Conventional method in radio propagation prediction is based on the fading channel models,with the aid of computer,mass of data were analyzed to make the propagation model localization.
常用的电波传播预测方法,一般是以路径损耗为预测模型,结合大量的测试数据,利用计算机进行辅助分析,实现传播模型本地化。
补充资料：不合格品预防措施(见预防措施)
不合格品预防措施(见预防措施)
preventive actions for nonconforming product: see preventive actions
buh6g6Pi阅YUfong cuoshi不合格品预防措施Co刊rorrni鳍p耐uet)(preventive actions fornon-见预防措施。
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