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东北地区经济发展的阶段划分及趋势 被引量:6
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作者 戴永安 陈才 张峁 《未来与发展》 2010年第2期102-105,113,共5页
本文针对东北地区经济发展阶段,从总量水平、经济社会结构、制度水平、创新水平和可持续发展水平五个方面构建指标体系,考察东北地区改革开放以来不同时期的发展度水平,同时借助Fisher最优分割法进行系统分析后认为,改革开放30年,东北... 本文针对东北地区经济发展阶段,从总量水平、经济社会结构、制度水平、创新水平和可持续发展水平五个方面构建指标体系,考察东北地区改革开放以来不同时期的发展度水平,同时借助Fisher最优分割法进行系统分析后认为,改革开放30年,东北地区经历了五个发展阶段,现在处在第五个阶段。 展开更多
关键词 发展阶段 经济发展度 最化分割法
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Global optimization design method for maximizing the capacity of V-belt drive 被引量:5
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作者 ZHANG ShaoJun WAN Zhong LIUGuangLian 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第1期140-147,共8页
An optimization model is constructed to formulate the maximization problem on the capacity of V-belt drive. The concavity,the monotonicity and the global optimality condition are studied for the objective function,and... An optimization model is constructed to formulate the maximization problem on the capacity of V-belt drive. The concavity,the monotonicity and the global optimality condition are studied for the objective function,and it is proved that the feasible region of the model is bounded,closed and convex under some design conditions. Then,a solution method,called an optimal segment algorithm,is developed to find the global maximizer of the model. Under four different design conditions,solution methods are presented respectively. Some real case studies are employed to demonstrate that the model and the algorithm in this paper are promising. 展开更多
关键词 V.belt global optimization capacity of drive optimal segment algorithm
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