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基于超效率SBM的中国省级煤炭产业生态效率评价研究 被引量:1
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作者 张丹丹 杨力 《四川理工学院学报(自然科学版)》 CAS 2019年第5期87-93,共7页
为促进矿产资源开发与环境保护的协调发展,实现社会生态文明建设,基于超效率SBM模型和ML指数模型以非期望产出为切入测算我国2013-2017年间各省区煤炭产业静态环境生态效率并对其进行动态环境分析.结果表明:相较于传统DEA模型,超效率SB... 为促进矿产资源开发与环境保护的协调发展,实现社会生态文明建设,基于超效率SBM模型和ML指数模型以非期望产出为切入测算我国2013-2017年间各省区煤炭产业静态环境生态效率并对其进行动态环境分析.结果表明:相较于传统DEA模型,超效率SBM模型能更好地解决非期望产出和存在多个有效决策单元的问题;2013-2017年间中国煤炭产业静态生态效率有逐年变好趋势但仍表现为非DEA有效,地区分布上北部沿海地区生态效率值明显高于其他地区,黄河中游、西北和西南煤炭产业的生态效率值排名相对靠后;环境技术效率提高是带动煤炭产业动态生态效率提升的主要原因.最后根据分析结果为煤炭产业生态效率的提高提出了有针对性的对策建议. 展开更多
关键词 煤炭产业生态效率 效率SBM模型 静态生态效率 动态生态效率
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Self-Optimizing Flexible Assembly Systems
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作者 Robert Schmitt Peter Loosen +6 位作者 Christian Brecher Alberto Pavim Max Funck Valentin Morasch Alexander Gatej Nicolas Pyschny Sebastian Haag 《Computer Technology and Application》 2011年第5期333-343,共11页
Today's production systems are demanded to exhibit an increased flexibility and mutability in order to deal with dynamically changing conditions, objectives and an increasing number of product variants within industr... Today's production systems are demanded to exhibit an increased flexibility and mutability in order to deal with dynamically changing conditions, objectives and an increasing number of product variants within industrial turbulent environments. Flexible automated systems are requested in order to improve dynamic production efficiency, e.g. robot-based hardware and PC-based controllers, but these usually induce a significantly higher production complexity, whereby the efforts for planning and programming, but also setups and reconfiguration, expand. In this paper a definition and some concepts of self-optimizing assembly systems are presented to describe possible ways to reduce the planning efforts in complex production systems. The concept of self-optimization in assembly systems will be derived from a theoretical approach and will be transferred to a specific application scenario---the automated assembly of a miniaturized solid state laser--where the challenges of unpredictable influences from e.g. component tolerances can be overcome by the help of self-optimization. 展开更多
关键词 Flexible assembly systems SELF-OPTIMIZATION multi agent systems COGNITION tolerance matching sensor data fusion.
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