The demonstration principles,procedures and methods for reliability index of launching system are put forward and the reliability indexes for each phase of development of launching system are given by using trade-off method and considering development cost,support cost and overall life cost in this paper.

Consider that it has to take cost to promote survivability,a synthetic tradeoff model of the survivability of networking air defense missile systems and combat cost .

Considering that it has to take cost to promote aircraft survivability, a synthetic tradeoff model of aircraft survivability and life circle cost is built.

A brand new method named Comprehensive Balancing of rotor balancing for vertical hydraulic power sets is approached in this paper.

Meanwhile,the synthetic weighted method is used to deal with distribution of the weight of indexes and includes both subjective and objective favoritisms.

This paper discusses the economic features of intellectual poverty,and advances the value evaluation model for intellectual poverty,the synthetic weighted method.

In order to avoid the appearance of the problem that the system collectivity function is affected by the serious flaw of single value, the synthetic method of variable weight is combined with the Expanded Weight of Arithmetic Average(EWAA)and the Language Hybrid Aggregate(LHA)arithmetic operators.