The paper discusses the features and fonn mechanisms of small and medium mould strike-slip faults in coal mines,analyses their fracturing effect,highlights mathematical moulds of trend stratum separation distance, which have great applied value for locating lost ledge.

Research and simulation of dynamic distance vector QoS routing algorithm;

Second, the classifier creates rule vector according to each groups of keywords and weights, which includes weight vector and distance vector.

With simple implementation and lower requirewment, the DV (distance vector)-based localization algorithms meet the requirement of WSN.

After analyzing several methods of query expansion based on mutual information, this paper introduces the vector distance between terms in documents space to the improvement of mutual information and brings forward a query expansion method based on vector distance in documents space.

Since word order similarity is the main factor to the ranking results,an algorithm based on vector distance is devised to compute word order similarity in this paper.

This paper aims at the characteristic that the IRQ interrupt vector addresses of ARM7 microcontroller are assigned on the interrupt vector registers dynamic,introduces the idea that roots the interrupt vectors into ROM,establishes the IRQ interrupt recovery system.

In this article,the hardware cascade structrue,port address,the system defination of interrupt vector and the system initiation of middle,and supper microcomputer s maskable interrupt system are analyzed,and it gives out the points for attention in application and takes Fangzheng MMX 166 to a concrete example.