This paper describes the operation principle of a simple phase sequence relay, its parameter calculating method, and the correlative relationship and optimization problem on element parameters.

本文阐述了一种简单的相序保护器的工作原理及其参数计算原则，讨论了元件参数之间的相对关系和优化问题。

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Using homology method, mutant ricin toxin A-chain(MRTA) deleting part of amino acid sequence was modeled by molecular mechanics optimization and molecular dynamics simulated annealing.

利用同源模建的方法，借助分子力学优化、分子动力学模拟退火设计构建了删除部分氨基酸序列的蓖麻毒素A链突变体（MRTA）。

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The optimization of query sentences is to select operation sequence with minimal costs in terms of given query so as to make query a time-saving and space-saving process.

查询语句的优化就是对于给定的查询，选择代价最小的操作序列，使查询过程既节省时间，又节省空间。

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