Research on coupling risk in evaluation of combat capability of armament systems;

The coupling risk of weapons equipment capability was studied by tolerance analysis.

In the fluid environment,the vibration of the structure can induce the ambient fluid to move along with it,which successively produce so-called added mass,and this is also an important part of the model of coupled wind-induced vibration theory for the long-span flexible structures in structural engineering.

A complete theoretical model with the wind feedback mechanism for steady state saltation is derived based on a simplified process of grainsurface impact.

This paper firstly defined construction contract risk and the foreseeable risk principle on the basis of the risk s meaning.

According to main manifestation of engineering contract risk, risk prevention in contract management and rational order of risk distribution,the author analyzes risk management of engineering contract,and proposes the methods to avoid and distribute risks in concrete project contract management from the angle of applicability,in order to promote well development of construction enterprise.

The main works of contract risk analysis are identification of these risks, effective reduction and avoidance of contract risk by way of effective countermeasures with appraisal of contract on contractor organization.