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Thin-walled parts are widely used in aerospace, ships and automotive fields. However, due to the characteristics of multi-process and multi-procedure manufacturing technology, the production efficiency and machining precision of those parts are greatly limited. In this paper, a unified geometric modeling method for precision machining of thin-walled parts is presented. The unified model is established...
According to the idea of existing quantity flexibility contract, aiming at the particularity of buyers' market's timeliness product, through introducing buyback contract method, a optimization model of supply chain flexibility contract is put forward which can incent dealer and make up the deficiency of single flexibility contract. An example is given to calculate the contented factors of wholesale...
The objective management system for oil production plant is built first; Then an energy evaluation system on base of energy technical efficiency, economic efficiency of energy and energy efficiency is constructed in multiple levels; Finally, a AHP-fuzzy comprehensive evaluation model is setup to evaluate the situation of energy-saving for oil production plant qualitatively.
In order to adapt high-speed, high performance (high power, low fuel consumption, low noise, low vibration, low pollution) as well as long-life development, this paper, on the basis for discussing shortage of present valve cam molded lines, introduces a deformed hyperbolical function cam molded-lines equation whose features are that the independent variable is the main structure parameter and operating...
The distribution problem in supply chain is studied in this article. To minimize the logistics cost in upstream and downstream enterprises in supply chain, Bi-level Programming Method is innovatively used in this article to establish the optimization model of the supply chain network distribution. Solving methods for this model are discussed and then an efficient arithmetic combined with layered iterative...
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