Analysis of 122 occupational accident cases in confined space;

This paper chosed special representative confined spaces as study objects, summarized the total character of indoor air pollutants and its influence factors, provided reference for controlling and management of pollutants.

In this paper,a theoretical study on active control of within enclosed space surrounded by flexiblestructure is accomplished.

Based on the basic theory of ANC within the enclosed space,this paper models the enclosed space with the COMSOL software,and presents the simulation and analysis effects of noise reduction which is derived from the numbers and location of the secondary noise resources.

A study is made of the effect of different acidizing conditions such as concentration,temperature and time on humidity-controlling properties of sepiolites in closed space at constant temperature.

Research on coupling loss of leaky coaxial cable in blind zone;

Owing to the advantages of uniform coverage on the radiated field, strong adaptability and little electromagnetic pollution on the environment, LCX is recently widely used in communication systems in the blind zone such as mines, tunnels, subways and so on and it has already extended to the indoor communication systems.

Based on the principle of the absence of natural convection in a rectangular airtight space under certain conditions the engineering application of radiation screen method for thermal insulation has finally been made possible through theoretical calculations,simulation tests and intermediary experiments.