Meanwhile the paper analyzes the deficiency of current transmission coding and describes a new data transformation method, base91 coding with high encoding efficiency but low data extension.
论文同时分析了现有的电子邮件系统传输编码存在的缺陷，提出了一种利用编码效率高、数据扩展率低的数字数据变换方法：基数- 91编码来提高编码效率。
This paper not only introduces the theory of extension method and matter-element, but demonstrates trade-off analysis between efficiency and cost by means of extension theory.
介绍可拓学及物元理论，提出用可拓工程方法对武器装备效能-费用进行权衡分析。
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