Azimuth/elevation direction finding using uniform circular array;

To answer a few commonly raised questions about the theory,based on basic concepts of optics,an easy access was proposed to the essentials of Chen s theory,such as its innovative "spinning plus elevation" rotations for tracking,its "row plus column" slave mirrors driving system for focusing as well as a few variants of different degrees of precision.

Based on the DTM(Digital Terrain Models) and combined with the feature of guided missile,this paper analyzes the impact of terrain undulating on the precision guided weapon from two aspects,including elevation parameter that faces to the slope of attack and relative position that the target is to the mountain s veil.

Effects of the blade elevation angle of rotating-stream-tray scrubber on the wet calcium FGD process;

decreased the elevation angle of the drum of the secondary blender and increased the rotating speed of the drum,which decreased the mixing time of materials and enhanced ball making efficiency of the mixing materials.

A GPS satellite coverage area is mainly discussed in this article including having elevation angles or not.

It is made an analysis of three layouts of steel cables for the normally placed pyramid grids,by considering the change of structural internal force and deformation,an optical layout of steel cables is provided.