The spatial spectra of net rift for image processing have been mathematically analysed by means of 2d Fourier transform. Its directional property has been found.

本文利用二维付里叶变换对图象中网络构造的频谱作了数学分析，并指出了它的方向特点。

It has characteristics of hydraulic setting, bi-directional slip anchoring, and fishing property of matching releasing tool, so it's an ideal tool for water shutoff and separate zone production.

它具有液压坐封、双向卡瓦锚定、配套丢手打捞工具打捞等基本特点，是油田卡堵水、分层采油的理想配套工具。

The SH numerical example shows that this new artificial boundary element has a multi-directional transmitting property.

SH波数值分析表明本文有限元模型具有多向波动透射能力。

This paper introduces the study on omni - directional vision system calibration method using central catadioptric projection property of space line.

利用空间直线的中心折反射投影的特性对全维视觉系统的标定方法进行了研究。

The directional and a certain distance control blasting removal nearby was introduced, the pipeline of chemical property.

结合实例，介绍了在易燃易爆的化工物料管线附近的六层厂楼的定向、定距控爆拆除。