This thesis applies and extends coritivity theory to a kind of system,sets up direct connective bipartite system,provides core and coritivity theory with new definition for this system,and offers coritivity algorithem for the system.

Makinguseofthetheoryofcoreandcoritivityofasystem ,weinvestigatedthemeasuringindexofnet works—reliabilityintelecommunicationnetworksresourcedisposal Weobtainnotonlyanewmethodmeasuringreli abilitybutalsoanalgorithmcomputingcoritivity Comparedwithtraditionalmethod ,thenewmethodhasveryappar entadvantage Ithasanimportantsignificationinnetworkprogrammin

The coritivity of G-S ,denoted by h(G) ,is defined as h(G)= max {ω(G-S)-｜S｜;S∈C(G)} ,where ω(G-S) denotes the number of components of G-S,C(G) denotes the collection of vertex cut sets in G.

In order to perfect the theories of the dynamic core and its application in the traffic management system,the methods of calculating the core and coritivity of the directional connected network system are proposed.

Based on the core and coritivity of the non-directional connected network system,this paper proposes the method of calculating the core and coritivity of the directional connected network system,and applies it in calculating the dynamic core and coritivity of the dynamic flow network system.

Study on the method of intensity checking of shafts with FEA;

Based on its static,dynamic analysis and dynamic intensity checking,stress and displacement distribution as well as dynamic response of the whole system and its important components are obtained.

This paper analyzes the characteristic of non standard hydraulic cylinders, discourses upon the general scheme of the CAD of non standard hydraulic cylinders, and emphasizes on discussing the implementing method of the dimension driving module and intensity checking module.

The diamond nucleation density is remarkably improved on WC-Co substrate by Copper/Titanium intermediate layer.

The nucleation density is more than 107cm-2 on Al2O3 and YG8 at 700~900℃, while less than 106 cm-2 on steel T10 with chromizing layer.

The results show that the nucleation density drastically increases when the carbon concentration is between 2% and 3%,while the nucleation density is quite low as carbon concentration is lower than 2%.

The nucleation temperature and crystallization temperature of the glass-ceramics were investigated.

The flexural strength of the glass-ceramics at different nucleation temperature was measured.

Study on strength checking data model for pump parts;

The Date-base system of pipe flange achieve the inquiring and strength checking of date about national standard pipe flange,and optimize the flange s dimensions if satisfied strength, and achieve the batch strength checking of FEA in Date-bas

Strength calculation and checking of key pumps parts have great effects on performance and lifespan of complete machines, conventional methods of strength checking could hardly meet the demands in design precision and efficiency.