基于单辅助源的阵列幅相误差校正方法

研究了一种基于辅助信源的阵列校正算法。当阵列存在不依赖方位的幅相误差时,用本文的方法对阵列进行校正,校正后的各个阵列各个通道的增益和相位均达到一致,对修正后的阵列采用MUSIC算法得到了准确的波达方向估计值,仿真试验验证了该方法的有效性和可行性。

对影响电大教学质量因素的分析

电大教学是一种多层次教学,是由信源、辅助信源和信宿构成的复杂的教学信息传播系统。主讲教师不能及时得到信息反馈,要改变这种状况,就要建立及时的信息反馈系统,正确处理主讲教师与辅导教师的关系。电大教学又是一种多媒体教学,但各种教学媒体又有其自身的缺陷,为了更好地发挥各种媒体的作用,要处理好各种媒体的关系,即以文字教材为主,音像教材只讲授重点、难点,讲授方法和思路,启发学生思考。

Information on a New Field of Knowledge： Metallurgical Econology

A new branch of science called econology is being defined and shortly characterized as studying the economics-ecology-energy associations （3E or E3 associations）. In the future, this must be transformed into tehnology （T）-economy-energy-ecology, so that the symbol of the econology shall be TE3. Being a new field, it becomes necessary to define and characterize the specific methodological tools. That＇s why the paper examines the following indices： （1） specific consumption of primary carbon; （2） specific consumption of primary negentropy; （3） reintegration rate of secondary materials and energy. Also, the following issues are presented： （1） the indirect pollution mechanism in metallurgy; （2） analysis of pollution issues by principle ＂think globally, act locally＂.