According to the standard for identification of major hazard installations(GB18218-2000) in China,and based on the definition and the classification of major hazards,an equivalent method is put forward in consideration of the inherent energy and educed energy of materials.

A method of calculating condensate equivalent gas volume is shown in this paper.

In order to analyse the calendar life of the aircraft from qualitatively to quantitatively,the technical key is the equivalence relation between the atmospheric environment exposed and tested, using the corrosion electric current I c as a scale of the corrosion environment of the metal structures.

Investigation of sedimentation fluxes, TEQ and sources of PCDD/Fs in Qingdao coastal sea.;

In present work,concentration of Ah-receptor agonists in soil organic extract was measured by an ethoxyresorfin O-deethylase(EROD) bioassay,which was calibrated and expressed by the 2,3,7,8-tetrachlorodibenzo-p-dioxin(2,3,7,8-TCDD) toxic equivalent(TEQ_bio).

The synthesis process of lignin-based epoxy resin was introduced, and studies were conducted on the effect of epichlorohydrindosage and reaction time on epoxy equivalent and lignin content.