Affected by higher Rayleigh wave modes in the surface wave field, the effective phase velocity obtained by spectral analysis of surface waves SASW.
由分层介质表面两不同点响应互谱分析(SASW)得到的有效相速度并不对应于面波基阶模态相速度，它与波场中高阶模态能量分配比例有关。
The results indicate that influenced by higher modes and the source, the effective phase velocity is related to frequency as well as the distance from the source.
结果显示在高模态及振源影响下表面波有效相速度不仅与频率有关，而且与传播距离有关。
The optical-electrical measurement is an effective and feasible way to measure solid particle concentration and velocity in gas-solid two phase flow.
应用光一电检测方法测量气一固两相流中固体微粒浓度、速度，是一种十分有效和可行的方法。
The improvement of motor's combustion velocity to shorten the action time and reduce the height of boost phase is an effective method for anti boost phase interception.
采用速燃发动机降低助推段高度、缩短助推时间是反助推段拦截的有效手段。
The improvement of motor's combustion velocity to shorten the action time and reduce the height of boost phase is an effective method for anti boost phase interception.
采用速燃发动机降低助推段高度、缩短助推时间是反助推段拦截的有效手段。
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