本文提出一种求解优化数学模型，属于非线性整数规划问题的方法——逐次近似法。
In this paper, an optimal mathematical model solving method, the successive approximation method, of the nature of nonlinear integral programming problem is suggested.
本文阐明无约束和有约束非线性问题的基本解法，并说明非线性规划的线性近似方法。
This article deals with the basic methods for solving unconstrained and constrained nonlinear problems. It describes also the linear approximation methods of nonlinear programming.
本文研究地面数字HDTV的频率规划，提出HDTV服务面积的一种近似计算方法。
This paper studies frequency planning of terrestrial digital HDTV and presents an approximate calculating method of HDTV service area.
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