This paper conducts a comprehensive research on how to solve parallel control in the actural application of DB, which leads to three main methods: comparative update, lock update and updated-word comparison.

Variable period updating algorithm of multiradar and ADS data fusion;

At present, there are all kinds of updating algorithm, but the choose value of every parame-ter in algorithm is usually on the basis of experience.

In this paper, an updating algorithm is proposed for matrix inversion in decorrelating and MMSE algorithm with randomly-accessing users in DS/CDMA system.

This paper considers the data mining of association rules on condition that transaction database D unchanged and itemsets I changed,presents two updating algorithms for the maintenance of association rules.