The conventional retrieval algorithm used directly the arithmetic expressions ig nores its retrieval operation features and has the low searching efficiency.
传统检索运算算法照搬算术表达式的算法，未考虑到检索运算的特点，因而其效率是不高的。
Research on how to optimize the buildup of the formation and how to make ships move efficiently is meaningful for improving the efficiency of submarine-searching operation.
研究舰艇编队的优化配置方法和兵力机动方法对于提高水面舰艇编队对潜搜索效率有着重要的意义。
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