An efficient optimization algorithm for distributed query;

Distributed query techniques for college and university enrollment information;

Conjunction data distribution tree applied in distributed query;

In the distributed database system, distributed inquiry process becomes difficult and complex because of the physical distribution and redundancy of data.

On the background of construction of the onecard system on campus, according to campus which has multiareas, it introduces the application of distributed database in the onecard system on campus in detail, and brief to introduce distributed inquiry about goal that optimize, tactics and the base .

As one of the most important fault-tolerant techniques,coordinated checkpoint based rollback-recovery has been adopted in large scale parallel computer systems.

This study was purposed to investigate the significance of mitosis checkpoint gene chfr expression in acute leukemia (AL).