The emergence of data mining provides strong technical support for the urgent need.
数据挖掘的出现为这一需要提供了有力的技术支持。
But, if we need recalculate rules from all data to mine knowledge after updating the database, it will consume massive resources, which causes the urgent demand of the incremental mining algorithm.
但是，如果在数据库更新之后要对全部数据重新进行挖掘，需要消耗大量的资源，这导致对增量挖掘算法的迫切需求。
The urgent affairs in a coal mining enterprise is to improve the level of the machinery and electricity equipments stocking.
提高煤矿企业机电设备采购管理工作水平是煤矿企业的当务之急，设计机电设备管理信息系统非常重要；
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