The analysis and the discussion are put forward for the application of the ventilation technique which is used widely.

Taking the ventilation in the construction of the inclined shaft in Wuqiaoling extra-long tunnel as an example, this paper expounds the tunnel construction ventilation technique from aspects of the construction environment, the calculation of the input air, the type selection of the fan, and the control of the wind direction and the wind pressure, etc.

The indoor air quality has drawn more and more attention．A good air environment is an important performance require- ment of healthy residence．This article introduces the applications of several types of ventilation techniques to residential buildings in Hangzhou are introduced,as well as some technical problems which should be taken into account during application

Management of technical risk in the development of complex products;

Appraisement model of technical risk for weapon system development;

A comprehensive means for evaluating technical risk in the simulation-based acquisition model for weapon systems;

Study on ventilation technology for the construction of Huangmaoshan tunnel;

The ventilation technology research for large space with a moving-heat source on sea;

Research on the model establishment of technological risk evaluation and its application in engineering projects;

The technological risk is a kind of technological alienation.