Inter-ridge distance is an important characteristic of fingerprint and is often used in fingerprint enhancement and ridge extraction procedures.

纹路间距是指纹的重要特征，经常用于指纹增强、纹路提取等过程中。

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Based on transmission line theory and extraction method of active impedance of waveguide slot, a simplified computation method for the leaky-wall ridge waveguide filter is presented in this paper.

基于传输线理论和波导裂缝有源阻抗提取方法，提出了一种脊波导漏壁式滤波器的简化算法。

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Thus it is an important topic of minimizing the degree of ridge resorption after tooth extraction to meet the future appearance and functional needs of denture production.

因此减少拔牙后齿槽脊的吸收，帮助日后制作的假牙满足功能和美观上的需求是临床上一个重要的课题。

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