This paper presents systematic theoretical calculations and the experimental investigations of the doubling frequency character of the crystal KN grown in China.
本文首次对我国生长的铌酸钾晶体的光学倍频特性进行了系统的理论计算和实验研究。
The buried pipe transfer equation, the frequency character and the attenuation equation of the leak signal are studied.
研究了埋地管道泄漏信号波的传播方程，泄漏信号频率特性以及衰减方程。
The Results indicate that the horizontal response of pile to Rayleigh wave is affected by frequency, character of soil medium, pile-soil rigidity ratio.
结果表明，饱和土介质中桩对瑞利波的横向响应受波的频率、土介质性质、桩—土刚度比等因素的影响。
Objective To investigate the influence of word frequency, spatial frequency, character strokes and myopia status in identifying Chinese characters.
目的探讨字频、空间频率、笔画数和近视程度对汉字图片辨认正确率的影响。
Objective To investigate the influence of word frequency, spatial frequency, character strokes and myopia status in identifying Chinese characters.
目的探讨字频、空间频率、笔画数和近视程度对汉字图片辨认正确率的影响。
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