Usually media failure is caused by either the complete loss of a data file or a system change number ( SCN ) time stamp being out of sync with the rest of the database. 通常媒体故障是由于数据文件完全丢失或系统更改编号(SCN)(SystemChangeNumber,SCN)时间戳与数据库的其余部分不同步造成的。
Prof Lu believes the system should change : [ The number of ] MBAs should be determined in the market. 陆雄文教授认为这一制度应该改变:MBA(的数量)应由市场决定。
Along with large scale popularization of motor vehicles, mankind has entered the motor vehicles society. The traffic system has undergone a qualitative change, but at the same time it derived a large number of traffic accidents, and thus it leads to compensation for damage. 随着机动车的大规模普及,人类进入了机动车社会,交通状况发生了质的飞跃,但同时电衍生了大量的交通事故,从而引发损害赔偿。
Secondly, according to the RFID system range electronic tag number of change, use method to estimate the probability to the number of identification tag, and it use appropriate frame length and complete information transmission of reader label. 其次,根据RFID系统范围内电子标签数量的变化,用概率估算方法估算待识别标签的数量,从而采用合适的帧长完成阅读器和标签的信息传递。
In recent years, along with the depth and quality of education in the basic education reform forward, the entire basic education system for teachers needs to focus on improving the quality of type change from the traditional number of need-based. 特别是近年来,伴随着基础教育的改革深入和素质教育的推进,整个基础教育系统对师资的需求已经从传统的数量需求型向质量型注重提高转变。