The intrinsically safe degree conception of axial fan performance is set up in this paper.

Application of BP neural network in the field of evaluation on intrinsical safety degree in mine

Point to the explosion protection about the wireless control system for the fast-aid repair equipment used in controlling pipeline s spillage,the fundament of intrinsically safety explosion protection and constituent of the control system are proposed.

There are two types of explosion-proof instruments,safety type and flame-proof type,which constitute intrinsic safety control system and flame-proof control system respectively.

There are two types of explosionproof instrument,they are safety type and explosionproof type,and they consist of intrinsic safety control system and explosionproof control system.

In this article we make a survey on financial security degree of capital movement in China,which rests on Probability Analytic Method in the economic security research and carries on several capital movement index commonly used in foreign.