共查询到11条相似文献,搜索用时 31 毫秒
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我国科学和技术事业发展到了一个新的台阶,我们的社会、管理部门(甚至学术界本身)过去往往将科学和技术几乎完全融为一体.文章试图在三重螺旋模式下探讨科学与技术的关系,以期政府能制定合理恰当的政策以促进本国科学技术的发展. 相似文献
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Luis A. Moncayo-Martínez 《International Journal of Production Economics》2011,131(1):407-420
This paper proposes a new approach to determining the Supply Chain (SC) design for a family of products comprising complex hierarchies of subassemblies and components. For a supply chain, there may be multiple suppliers that could supply the same components as well as optional manufacturing plants that could assemble the subassemblies and the products. Each of these options is differentiated by a lead-time and cost. Given all the possible options, the supply chain design problem is to select the options that minimise the total supply chain cost while keeping the total lead-times within required delivery due dates. This work proposes an algorithm based on Pareto Ant Colony Optimisation as an effective meta-heuristic method for solving multi-objective supply chain design problems. An experimental example and a number of variations of the example are used to test the algorithm and the results reported using a number of comparative metrics. Parameters affecting the performance of the algorithm are investigated. 相似文献
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通过一种蓄热技术使发酵过程中的余热得到了很好地利用。经过实际检测,一台100m3发酵罐,实消降温时产生了高温冷却水,通过相变蓄热将高温冷却水中的热量予以储存,存储热量可达117×105 kJ。 相似文献