【摘要】 在分析实时数据库中应用的旋转门压缩算法和基于斜率比较的旋转门压缩算法原理的基础上,提出了比例压缩算法和改进的基于斜率比较旋转门压缩算法。改进的算法通过改变构造斜率区间的时间点和角度,通过斜率最大点和斜率最小点来构造符合条件的斜率区间范围,以完成数据的压缩。给出了改进压缩算法的应用实例、性能的整体测试和分析,与旋转门压缩性能进行了对比分析。测试实验证明,该算法可以满足采集点不同分布情况下的数据压缩需求。更多还原

【Abstract】 After analyzing the rationale of compression algorithms of revolving door applied in real-time database and based on slope comparison respectively,in this paper it brings forward the proportion compressing algorithm and an improved data compression algorithm based on slope comparison.The ameliorated algorithms are to build a slope interzone scope satisfying formation conditions through the modification of time point and angle in constituted slope interzone and through the maximum point and minimum point of slope so as to compress the data.In this paper it introduces the applied examples of the improved compression algorithms,the overall tests and analysis of their functions.Finally it makes the comparative analyzes on their compression functions with that of the existing revolving door.The testing experiment proves that the algorithms will satisfy the requirements of data compression whose gathering points are in different distributing zones.更多还原