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According to need of drawing standard and practical application, mine ventilation network graphics CAD has been developed for solving safety management for coal mine. It introduces key solution of mine ventilation network graphics CAD, such as drawing node and branch geometry, drawing ventilation facilities and other aspects. Firstly it gives functional need of ventilation system management to ventilation...
A formal model of a knowledge base system consisting of a domain knowledge base and a user knowledge base in intelligent tutoring systems is presented in this paper. The domain knowledge base is represented by 3-level structure: subject level, knowledge concept level and learning material level; and ontologies are introduced in order to improve the sharing and reusing of multimedia teaching materials...
The information from Internet and the acceptance of offers are uncertainty in e-commerce, so this work presents a model using fuzzy logic to support bilateral agent negotiation. In the model, a negotiation can be made only if there exits a zone of agreement between the retentive offers of participants. We assigned approximate weight to different issues of an offer based on their importance degrees...
Information resources management is the basis of supply chain, and plays a vital role in enterprises competition. It will inevitably shift to the information resources management of supply chains. Information resources can produce values and are the most important source of competitive advantage on a supply chain. Based on the basic theories on information resources of a supply chain, this article...
The software of chemkin 4.0 has been used to simulate the reburning process of micronized coal, which contains the organic acid salt used as the accelerant. Intermediate products, especially the hydrocarbon, the sulfur compound and the nitrogen-containing material, have been analyzed, thus we have more profound understanding of the reaction mechanism. To some extent, it also has significance guiding...
Based on the 400t/h tangential boiler, the software of FLUENT was used to simulate the temperature field, the distribution of each species concentration field and NOx concentration distribution when co-firing coal and biomass (wheat straw, maize straw and wood dust) which was under the different ratios. The results of calculation and numerical simulation showed that the emission of CO2, SO2, NOx and...
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