After analyses system requirements, detailed design was given, including system architecture, system parameters, database design and genetic operator design. 并在系统需求分析的基础上给出了系统的详细设计,包括系统结构、系统参数确定、数据库设计以及遗传算子设计,并给出了遗传算法算法组卷的代码。
Exploring Distributed Spatial Database Engine Independent on Operator System Platform 平台无关的分布式空间数据引擎技术初探
The advantage of algorithm lies in that, employing matrix method, only scanning the database once and reducing candidate test time by using the Boolean AND operator. 该算法的优势在于引入矩阵的思想,只扫描数据库一次,并利用布尔与运算降低了测试候选项目集的时间开销。
No matter the diversification of the source of the data, will enter the database in this container finally, in order to let the front operator dispatch. 不论数据来源的多样化,最终必将进入数据库这一容器中,以待前端操作人员的调度。
The join is an important operator in data processing which has been studied a lot in traditional database. Because of the map / reduce framework itself, it can not support join operator perfectly. 连接操作作为数据处理中一种十分重要的操作,在传统数据库中已经得到了很多的研究,由于map/reduce自身框架的原因,它并不能很好地支持连接操作。