Effects of a covering layer in a circular - arc canyon on incident plane sv waves 转换波转换点坐标的唯一解析解
The discrete wavelet transform ( dwt ) technique has been widely used in signal processing and image processing 离散小波转换的技术,已被广泛的应用于讯号分析与影像处理的问题上。
Since the dwt coefficients have the property of energy conservation in the low frequency part , it is suitable for data compression 由于小波转换后的系数呈现能量集中低频的特性,非常适合影像资料压缩的前处理。
The signal generating source is simplified after the theoretical analyse of the system , and the cumbersome transformer is replaced too . in addition , the carbon fiber cathode substituted for the stainless steel cathode on the tomachan experimental device 在二极管阴极方面,为提高虚阴极振荡器束波转换的效率,利用碳纤维阴极替换原来的不锈钢阴极来改善电子束质量。
Since the flexural waves in the plate would produce scattered waves when they propagated through the flaw of a plate , the measured signals of a strain gauge contented the direct waves propagated from the impact source and the scattered waves propagated from the flaw 藉由小波转换进行讯号的时频分析,进而求得弯曲波由冲击点至各应变规的波程时间,并计算出弯曲波在各频率中的波群速度。