A new experimental scheme of measuring lens focal length has been put forward on the basis of the improved laser plate shearing interference method.
本文在改进的激光平板剪切干涉法基础上，提出了测量透镜焦距的一种新的实验方案。
After analyzing the automatic fingerprint recognition based on structural features, we improved it and put forward a step by step structural matching method. The recognition is grouped two step.
分析了基于结构匹配的指纹自动识别方法，并对其作出了改进，提出了一种分阶段的结构匹配识别方法，把识别分为两步进行。
Aimed at the ultrasonic signal polluted by noises, which is low in SNR, a method of the ultrasonic signal denoising in wavelet domain based on an improved threshold function was put forward.
针对超声无损检测中超声信号受噪声污染、信噪比不高的情况，提出了一种新的基于改进阈值函数的小波域超声信号去噪方法。
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