Captured CPU time is the CPU busy time that the operating system can reliably attribute to a given address space.
捕获的 CPU 时间是操作系统能可靠地用于一个特定的地址空间的 CPU 被占时间。
The time complexity and space complexity of the traditional attribute reduction algorithm using discernible matrix are quite big.
传统的利用区分矩阵进行属性约简算法,其时间复杂度和空间复杂度很大。
First, the attribute of studies, theoretical research is different from applied study: the former requires data to be continuous in time and entire in space, but the latter demand the data to be new.
一是研究的属性问题,即理论研究和应用研究在资料利用方面的不同:理论研究要求数据资料的时间连续性和空间完整性,但对数据的现势性没有特别要求;
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