An open course selecting system based on credit system is given.

给出了一个基于学分制的开放式选课系统的设计和实现。

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As the implement of credit system in colleges and universities, the network based course arrangement and course selecting system become more and more important.

随着学分制的实施，高校的计算机排、选课系统对学分制体制的辅助实现起着愈加重要的作用。

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The important factors which affect the gear abrasion are the design of machine tool's spiale system and the selecting of main process parameters in the course of the gear abrasion.

研齿过程中机床主轴系统的设计以及主要工艺参数的选择是影响研齿效果的重要因素。通过主轴系统的动态分析，可以解决电机与主轴间连接刚度的选择以及飞轮尺寸的选择问题。

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