2015年,新加坡教育部推出第四个教育信息化发展规划——Master Plan 4,它对教育信息化愿景、目标和实施策略的描述既与前三个教育信息化规划一脉相承,同时又有很大的改进。文章梳理了Master Plan 4提出的背景,并从愿景、目标和实施策略...2015年,新加坡教育部推出第四个教育信息化发展规划——Master Plan 4,它对教育信息化愿景、目标和实施策略的描述既与前三个教育信息化规划一脉相承,同时又有很大的改进。文章梳理了Master Plan 4提出的背景,并从愿景、目标和实施策略等三个方面分析了其具体内容,最后提出了促进我国教育信息化发展的相关建议,以期对我国教育信息化的发展有所启示。展开更多
Process planning for large complicated stampings is more complicated, illegible and multiform than that for common stampings. In this paper, an intelligent master model of computer aided process planning （CAPP） for ...Process planning for large complicated stampings is more complicated, illegible and multiform than that for common stampings. In this paper, an intelligent master model of computer aided process planning （CAPP） for large complicated stampings has been developed based on knowledge based engineering （KBE） and feature technology. This innovative model consists of knowledge base （KB）, process control structure （PCS）, process information model （PIM）, multidisciplinary design optimization （MDO）, model link environment （MLE） and simulation engine （SE）, to realize process planning, optimization, simulation and management integrated to complete intelligent CAPP system. In this model, KBE provides knowledge base, open architecture and knowledge reuse ability to deal with the multi-domain and multi-expression of process knowledge, and forms an integrated environment. With PIM, all the knowledge consisting of objects, constraints, cxtmricncc and decision-makings is carried by object-oriented method dynamically for knowledge-reasoning. PCS makes dynamical knowledge modified and updated timely and accordingly. MLE provides scv. cral methods to make CAPP sysmm associated and integrated. SE provides a programmable mechanism to interpret simulation course and result. Meanwhile, collaborative optimization, one method of MDO, is imported to deal with the optimization distributed for multiple purposes. All these make CAPP sysmm integrated and open to other systems, such as dic design and manufacturing system.展开更多
文摘2015年,新加坡教育部推出第四个教育信息化发展规划——Master Plan 4,它对教育信息化愿景、目标和实施策略的描述既与前三个教育信息化规划一脉相承,同时又有很大的改进。文章梳理了Master Plan 4提出的背景,并从愿景、目标和实施策略等三个方面分析了其具体内容,最后提出了促进我国教育信息化发展的相关建议,以期对我国教育信息化的发展有所启示。
文摘Process planning for large complicated stampings is more complicated, illegible and multiform than that for common stampings. In this paper, an intelligent master model of computer aided process planning （CAPP） for large complicated stampings has been developed based on knowledge based engineering （KBE） and feature technology. This innovative model consists of knowledge base （KB）, process control structure （PCS）, process information model （PIM）, multidisciplinary design optimization （MDO）, model link environment （MLE） and simulation engine （SE）, to realize process planning, optimization, simulation and management integrated to complete intelligent CAPP system. In this model, KBE provides knowledge base, open architecture and knowledge reuse ability to deal with the multi-domain and multi-expression of process knowledge, and forms an integrated environment. With PIM, all the knowledge consisting of objects, constraints, cxtmricncc and decision-makings is carried by object-oriented method dynamically for knowledge-reasoning. PCS makes dynamical knowledge modified and updated timely and accordingly. MLE provides scv. cral methods to make CAPP sysmm associated and integrated. SE provides a programmable mechanism to interpret simulation course and result. Meanwhile, collaborative optimization, one method of MDO, is imported to deal with the optimization distributed for multiple purposes. All these make CAPP sysmm integrated and open to other systems, such as dic design and manufacturing system.
文摘为了促进区域配电网新能源电力的就地消纳、解决传统储能形式难以满足由新能源间断性发电带来的长时存储需求,考虑氢储能的多能联产联储特性,提出计及共享交易机制的多类型微网共享氢储能系统容量规划方法.考虑异质性微网的多种调节需求,设计由微电网群运营商配置氢储能的多微网能源交易基本框架.考虑氢储能在共享运营时与多微网间复杂的利益交互关系,计及微网内部的电热需求响应,提出基于主从博弈的共享氢储能交易定价机制,以保证共享模式的可持续发展.对共享氢储能的容量规划进行研究,降低微电网群运营商的投资成本,保证微电网群运营商的共享收益.算例分析结果表明,利用所提的容量规划方法,能够缩短微电网群运营商的氢储能投资回收年限2.36 a.
