多准则决策分析已广泛用于卫生决策领域。通过分类方法测量属性(measuring attractiveness by a categorical based evaluation technique,MACBETH)是一种多准则决策分析方法,该方法与其他价值测量方法的关键区别在于MACBETH使用了对吸...多准则决策分析已广泛用于卫生决策领域。通过分类方法测量属性(measuring attractiveness by a categorical based evaluation technique,MACBETH)是一种多准则决策分析方法,该方法与其他价值测量方法的关键区别在于MACBETH使用了对吸引力差异的定性判断,以为选项生成价值分数。M-MACBETH软件可实现MACBETH分析过程,包括价值树的结构化、建立价值函数、对备选方案的各准则评分、对准则赋权、一致性检验及敏感性分析等。本文主要介绍了MACBETH的基本原理及如何使用M-MACBETH软件实现多准则决策分析。展开更多
C^1 natural element method （C^1 NEM） is applied to strain gradient linear elasticity, and size effects on mi crostructures are analyzed. The shape functions in C^1 NEM are built upon the natural neighbor interpolati...C^1 natural element method （C^1 NEM） is applied to strain gradient linear elasticity, and size effects on mi crostructures are analyzed. The shape functions in C^1 NEM are built upon the natural neighbor interpolation （NNI）, with interpolation realized to nodal function and nodal gradient values, so that the essential boundary conditions （EBCs） can be imposed directly in a Galerkin scheme for partial differential equations （PDEs）. In the present paper, C^1 NEM for strain gradient linear elasticity is constructed, and sev- eral typical examples which have analytical solutions are presented to illustrate the effectiveness of the constructed method. In its application to microstructures, the size effects of bending stiffness and stress concentration factor （SCF） are studied for microspeciem and microgripper, respectively. It is observed that the size effects become rather strong when the width of spring for microgripper, the radius of circular perforation and the long axis of elliptical perforation for microspeciem come close to the material characteristic length scales. For the U-shaped notch, the size effects decline obviously with increasing notch radius, and decline mildly with increasing length of notch.展开更多
文摘多准则决策分析已广泛用于卫生决策领域。通过分类方法测量属性(measuring attractiveness by a categorical based evaluation technique,MACBETH)是一种多准则决策分析方法,该方法与其他价值测量方法的关键区别在于MACBETH使用了对吸引力差异的定性判断,以为选项生成价值分数。M-MACBETH软件可实现MACBETH分析过程,包括价值树的结构化、建立价值函数、对备选方案的各准则评分、对准则赋权、一致性检验及敏感性分析等。本文主要介绍了MACBETH的基本原理及如何使用M-MACBETH软件实现多准则决策分析。
基金supported by the SDUST Spring Bud (2009AZZ021)Taian Science and Technology Development (20112001)
文摘C^1 natural element method （C^1 NEM） is applied to strain gradient linear elasticity, and size effects on mi crostructures are analyzed. The shape functions in C^1 NEM are built upon the natural neighbor interpolation （NNI）, with interpolation realized to nodal function and nodal gradient values, so that the essential boundary conditions （EBCs） can be imposed directly in a Galerkin scheme for partial differential equations （PDEs）. In the present paper, C^1 NEM for strain gradient linear elasticity is constructed, and sev- eral typical examples which have analytical solutions are presented to illustrate the effectiveness of the constructed method. In its application to microstructures, the size effects of bending stiffness and stress concentration factor （SCF） are studied for microspeciem and microgripper, respectively. It is observed that the size effects become rather strong when the width of spring for microgripper, the radius of circular perforation and the long axis of elliptical perforation for microspeciem come close to the material characteristic length scales. For the U-shaped notch, the size effects decline obviously with increasing notch radius, and decline mildly with increasing length of notch.
