Based on carbon isotope analysis of the calcium carbonate cements in Jurassic sandstone, it is believed that gas dissipation was related with 20% of the calcium carbonate cements and the formation of tight sand seal, and the preferential dissipation and consumption of methane resulted in the wet-prone gas.

Losing the Essence of Womanhood——On research of womanhood problems in Zhang Ai-ling s Novels;

Investigating geochemistrical characteristics of losing gas is of importance in natur.

Based on the analysis of development and distribution characteristics of biogas sourcerock in Binbei region,Heilongjiang Province,this paper establishes a method for estimating biogas diffusion loss amount through establishing the geological and mathematical model of biogas diffusion loss amount and determining main calculation parameters.

Aimed at the influence of bore heat loss on projectile muzzle velocity, the mathematical model of bore heat loss was built up, and its quantitative analysis and numerical caculation were accomplished.

The results show that the error between corrected whole heat loss and theoretical whole heat loss is less than 10%,and the burning rate pressure index of SF-3 propellant obtained is close to the expected value.

A study on dissipation rates of ester flavors in cigarettes;

Firstly, two major categories of modes and route of oil and gas losses have been presented in this paper, namely, the hydrocarbon loss through migration and after formation of reservoirs, and then different modes of hydrocarbon losses are discussed respectively.

Firstly, two major categories of modes and approaches of oil and gas losses have been presented in this paper, namely, the hydrocarbon loss through migration and after formation of reservoirs, and then different modes of hydrocarbon losses were discussed respectively.