叙述了山区超短波无线电通信电路设计的有关技术问题, 给出了山峰绕射模式的传输损耗计算方法、绕射位置判断的方法及计算程序流程图, 最后通过实例说明此方法的计算精度。-Describes a mountainous area VHF radio communication circuit design technology, gives the peak diffraction patterns of transmission loss calculation method, diffraction

BP神经网络客流量预测算法的研究，用于基于matlab平台对铁路、公路的客流量进行预测-BP neural network traffic prediction algorithm, based on the the matlab platform on the railway, highway traffic forecast