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The flux of N in broad-leaved Korean pine forest land, Changbai Mountain, Northeast China was studied with thein situ sequential coring technique. The results showed that, in the growing season of 1994 (May to September), net rate of mineralization was 47.96 kg/hm2, plant uptake 28.37 kg/hm2 and leaching losses 20.47 kg/hm2. Net N mineralization rate exceeded plant uptake requirements. On the basis...
This paper studied fuzzy comprehensive evaluation for fracturing in depth and pointed out the drawbacks of Max-product Composition. And then, based on Einstein operator, this paper established the model of fuzzy comprehensive evaluation for fracturing effect which can be used to analyze and optimize various parameters such as fracture length, conductivity, height, etc.. Finally, it is proved that...
The relaxation search algorithm to identify the parameters of hydraulic fractured gas wells is developed in this paper based on the inductive matrix. According to the optimization theory and parallel computation method, the parameters to be identified are divided into 2 parts and a set of software for hydraulic fracturing simulation is designed, which is suitable to run on parallel computers. The...
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