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“对数”定义难学的心理分析 被引量:22
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作者 赵思林 《数学教育学报》 北大核心 2012年第6期77-81,共5页
从数学学习心理学和脑科学等角度,分析“对数”定义难学的一些原因如下:(1)学生对数学概念和符号的学习有畏惧心理,甚至产生学习焦虑;(2)“对数”定义的学习不能以最经济的同化学习方式进行;(3)“对数”定义的学习受到工作... 从数学学习心理学和脑科学等角度,分析“对数”定义难学的一些原因如下:(1)学生对数学概念和符号的学习有畏惧心理,甚至产生学习焦虑;(2)“对数”定义的学习不能以最经济的同化学习方式进行;(3)“对数”定义的学习受到工作记忆容量的限制:(4)“对数”定义中隐含了大量演绎推理,会增加学习难度.因此,教学中应注意:(1)激活非认知情意系统,抑制畏惧心理;(2)运用先行组织者策略,呈现几个引导性材料;(3)尽力减少工作记忆加工的组块;(4)适当增加教学课时. 展开更多
关键词 “对数”定义 心理分析 工作记忆 教学建议
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Research on the Definition and Influence of New Production of Ship Industry Index of Energy Efficiency on the Ship Design Process
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作者 Wang Ya Tao Wu Fei 《International Journal of Technology Management》 2015年第9期102-104,共3页
In this paper, we conduct research on the definition and influence of new production of ship industry index of energy efficiency on the ship design process. Ship energy saving is the key to energy saving ship form opt... In this paper, we conduct research on the definition and influence of new production of ship industry index of energy efficiency on the ship design process. Ship energy saving is the key to energy saving ship form optimization design. In the ship under the conditions of use, and to optimize the design of the hull lines with boat, minimize the ship resistance, with the final choice of ship host fuel-sipping. Our research combine the characteristics of the energy efficiency with the shipbuilding industry with the novel and innovative design pattern which will be meaningful. 展开更多
关键词 Energy Efficiency Ship Industry Ship Design Process Definition and Influence.
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Research on the Definition and Influence of New Production of Ship Industry Index of Energy Efficiency on the Ship Design Process
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作者 Wang Ya Tao Wu Fei 《International Journal of Technology Management》 2015年第11期7-9,共3页
In this paper, we conduct research on the definition and influence of new production of ship industry index of energy efficiency on the ship design process. Ship energy saving is the key to energy saving ship form opt... In this paper, we conduct research on the definition and influence of new production of ship industry index of energy efficiency on the ship design process. Ship energy saving is the key to energy saving ship form optimization design. In the ship under the conditions of use, and to optimize the design of the hull lines with boat, minimize the ship resistance, with the final choice of ship host fuel-sipping. Our research combine the characteristics of the energy efficiency with the shipbuilding industry with the novel and innovative design pattern which will be meaningful. 展开更多
关键词 Energy Efficiency Ship Industry Ship Design Process Definition and Influence.
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HIGHER-ORDER DUALITY FOR A CLASS OF NONDIFFERENTIABLE MULTIOBJECTIVE PROGRAMMING PROBLEMS INVOLVING GENERALIZED TYPE I AND RELATED FUNCTIONS 被引量:2
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作者 S. K. MISHRA Shouyang WANG Kin Keung LAI 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2011年第5期883-891,共9页
This paper extends the class of generalized type I functions introduced by Aghezzaf and Hachimi(2000) to the context of higher-order case and formulate a number of higher-order duals to a non-differentiable multi-ob... This paper extends the class of generalized type I functions introduced by Aghezzaf and Hachimi(2000) to the context of higher-order case and formulate a number of higher-order duals to a non-differentiable multi-objective programming problem and establishes higher-order duality results under the higher-order generalized type I functions introduced in the present paper, A special case that appears repeatedly in the literature is that the support function is the square root of a positive semi-definite quadratic form. This and other special cases can be readily generated from these results. 展开更多
关键词 Generalized convexity higher order duality non-differentiable nonlinear programming support function.
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Prescribing Curvature Problems on the Bakry-Emery Ricci Tensor of a Compact Manifold with Boundary
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作者 Weimin SHENG Lixia YUAN 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2014年第1期139-160,共22页
t The authors consider the problem of conformally deforming a metric such that the k-curvature defined by an elementary symmetric function of the eigenvalues of the Bakry-Emery Ricci tensor on a compact manifold with ... t The authors consider the problem of conformally deforming a metric such that the k-curvature defined by an elementary symmetric function of the eigenvalues of the Bakry-Emery Ricci tensor on a compact manifold with boundary to a prescribed function. A consequence of our main result is that there exists a complete metric such that the Monge-Amp^re type equation with respect to its Bakry-Emery Ricci tensor is solvable, provided that the initial Bakry-Emery Ricci tensor belongs to a negative convex cone. 展开更多
关键词 k-Curvature Bakry-Emery Ricci tensor Complete metric Dirichletproblem
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DUALITY FOR A CLASS OF NONS MOOTH MULTIOBJECTIVE PROGRAMMING PROBLEMS
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作者 PENGJianwen YANGXinmin 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2005年第1期74-85,共12页
In this paper, two new dual models of nonsmooth multiobjective programmingare constructed and two duality results are derived.
关键词 locally lipschitz function multiobjective programming generalizedconvexity duality theorems
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