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This article seriously analyzed the work procedure of the workflow engine, proposed the overall structure and design model of the workflow engine based on the relational data model, carefully discussed the design plan of the data and process control parts of the workflow engine, and realized the flow control from the data base trigger.
Life Cycle Assessment (LCA) is considered as an important potential sustainable development tool in 21 century. China is the biggest coal consume country in the whole world, and the coal-fired power generation is the biggest customer. Assesses environment in it with the CLA, it will improve ecological environment and the whole global macroclimate. Software design of LCA for coal-fired power generation...
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