In this paper,the efficiency problems of two sparse techniques,namely,storage of array and storage of linking list,in Newton power flow calculation have been studied.

Binary Linked Storage Representation and Algorithm Design of Generalized List;

It discusses the relation-element and matter-elelment\' s storage in computer by orthogonal list storage based on graphs.

This paper presented the directed itemsets graph to store the information of frequent itemsets of transaction databases,and put forward the trifurcate linked list storage structure of directed itemsets graph,and provided the mining algorithm of maximal frequent itemsets based on directed itemsets graph.

This paper presents the directed itemsets graph to store the information of frequent itemsets of transaction databases,and puts forward the trifurcate linked list storage structure of directed itemsets graph,and provides the mining algorithm of frequent closed itemsets based on directed itemsets graph.

According to the insufficiency in data storage of the multi-rigid-body system,the research on relation between the structure of multi-rigid-body system and the directed graph in graph theory is done,and a new linked storage model based on orthogonal list is proposed.

This thesis started from basic idea if inserting element and deleting element from linked storage of linear list,differently giving the algorithm idea for implementation of the operation.