The paper introduces the fundamental principle of direction finding with amplitude comparison and analyses two ways of forming cross beam.

This thesis contain: some classical array configuration’s characteristics are listed and analyzed; the sparse spatial array’s synthesis method is studied under multiple restrictions; spatial power combination realized by cross beam method is studied; and the law of electric strength distribution in target area is investigated, too.

In this paper, compensation techniques of seismic simulation system are introduced primarily, including geometric cross coupling compensation, overturning movement compensation, off center load compensation and force balance compensation.

Quick Solution to Geometric Constraint Based on Genetic Algorithm;

Design and realization of a unified geometric constraint engine;

Research on the strategy of geometric constraint satisfaction problem;

An approach of a general geometry constraint engine: constraint broadcasting automation;

Wavelet diffusion filter considering scale correlation and geometry constraint;

In order to solve the problem of B-spline curve modeling based on physically deforming with geometry constraints,a method of freedom degree transformation is presented.