运用模糊相关和多因素定量分析，对速度练习方法优化选择。
Blurred interrelation and multifactor quantitative analysis are employed to optimize the method of speed training.
介绍了排种器的基本结构和工作过程，对其工作速度和结构参数的优化设计进行了分析探讨。
Introduced basic construction and work process of seed discharger, analysed and discussed optimization design of its work speed and construction parameters.
本文通过分析数据库应用系统中常见的几种运算，提出了如何构建SQL语句，才能达到运算的优化，提高系统运行速度。
Based on the analysis to several usual operations in data base application system, the optimized strategy on how to construct SQL sentence to improve operation speed is studied in this paper.
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