For the problem of multi-constrained QoS routing with the inaccurate state information of networks,a critical point model is constructed,and an algorithm based on the depth of the distance vector,MCPSA,is proposed for the problem.

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.

Based on the analyses, a new approximate reasoning method using distance measures is proposed which can be used to solve the problems in CRI and AARS.

To protect the digital library,an intrusion detection system model for network database based on data mining algorithm with the notion of distance measure is proposed after introducing the technology of intrusion detection for database.