浔江大湟江口水文站资料单值化分析探讨

通过对大湟江口站 2 0 0 0年汛期洪水分析 ,探讨该站资料整编单值化分析方法。     

具有虚约束的平行四边形机构的受力分析

鉴于现有机构受力分析方法不能完全解决具有虚约束机构的受力状况,文中提出了将具有静力确定性机构的力分析法与超静定结构的力分析法相结合的求解方法,对具有虚约束的平行四边形机构进行了受力分析和求解。其步骤是,先应用刚体力学方法求出机构的部分受力,然后引入一垂直于原连架杆的假想刚性连架杆,将机构转化为受力,变形等效的结构,再应用结构力学中的力法进行求解。该方法简便易行,实用性强,其解题思路还可为其他具有虚约束的连杆机构的受力分析提供参考。图3表2参2。     

Three-dimensional linear elastic distributions of stress and strain energy density ahead of V-shaped notches in plates of arbitrary thickness

This paper presents an analytical solution, substantiated by extensive finite element calculations, for the stress field at a notch root in a plate of arbitrary thickness. The present approach builds on two recently developed analysis methods for the in-plane stresses at notch root under plane-stress or plane strain conditions, and the out-of-plane stresses at a three-dimensional notch root. The former solution (Filippi et al., 2002) considered the plane problem and gave the in-plane stress distributions in the vicinity of a V-shaped notch with a circular tip. The latter solution by Kotousov and Wang (2002a), which extended the generalized plane-strain theory by Kane and Mindlin to notches, provided an expression for the out-of-plane constraint factor based on some modified Bessel functions. By combining these two solutions, both valid under linear elastic conditions, closed form expressions are obtained for stresses and strain energy density in the neighborhood of the V-notch tip. To demonstrate the accuracy of the newly developed solutions, a significant number of fully three-dimensional finite element analyses have been performed to determine the influences of plate thickness, notch tip radius, and opening angle on the variability of stress distributions, out-of-plane stress constraint factor and strain energy density. The results of the comprehensive finite element calculations confirmed that the in-plane stress concentration factor has only a very weak variability with plate thickness, and that the present analytical solutions provide very satisfactory correlation for the out-of-plane stress concentration factor and the strain constraint factor.     

道路约束在Kalman滤波中的应用

研究把道路约束引入Kalman滤波的新方法,分析了道路对过程噪声和目标速度的约束,给出了道路约束条件下目标的运动方程以及过程噪声方差调整的方法;将道路对目标速度的约束以伪测量的形式引入测量方程并给出了对应的滤波方程。两个不同场景的蒙特卡罗仿真结果验证了上述新算法带来的性能改善。     

波浪绕射非线性数学模型

本文用波数矢量无旋波能守恒方程和非线性弥散关系一起建立了一个浅水波浪绕射的非线性数学模型。在此模型中以非线性弥散关系（经验非线性弥散关系和理论非线性弥散关系）引入浅水波浪绕射理论，组成浅水波浪非线性数学模型。并且在波能守恒方程中考虑了底摩擦的影响。模型中通过对一个斜坡浅滩水域的波浪绕射现象。对使用经验非线性弥散关系和理论非线性弥散关系以及线性弥散关系的计算结果进行了比较。结果表明；使用非线性弥散关系比使用线性弥散关系的计算结果与试验结果现加吻合；水波在浅水传播时使用经验非线性弥散关系和使用理论非线性弥散关系两者相关甚微，但采用经验弥散关系近似波浪在浅水传播时的非线性的计算量远小于理论非线性弥散关系的计算量。所以在实际应用时采用经验非线性弥散关系是较为简单合理的和完全可行的。     

测井约束地震反演解决地质问题能力的探讨

本文首先从地震勘探的基本原理出发，分析地震反演解决地质问题的本质；然后从基础资料的品质、测井约束地震反演方法及反演参数的选择，地层格架模型建立和外推控制三个方面，分析、探讨测井约束地震反演解决地质问题的能力；最后认为，测井约束地震反演解决地质问题的能力是有限的，并提出了提高测井约束地震反演解决地质问题能力应重视的几个因素。     

纺织品图案设计的整体感

纺织品图案设计的整体感是保证设计质量的主要内容，也是检验设计作品成败的关键之一。文章从内在联系、主旋律、主色调、系列化四个方面作了相应的阐述，强调纺织品图案设计的整体性是建立在具有多种变化因素基础上的整体设计。     

商品住宅设计中应处理好的几个关系问题

商品住宅的设计要达到好的效果,必须在设计的建设过程中处理好几方面的关系。建筑师既要与开发商做好前期沟通工作,获得共同的价值取向,又要与各种的工程师通力合作,在技术价值观上获得统一,这样才能在住宅设计过程中求精创新,设计出好的作品。     

Therapeutic alliance: Theme and variations.

The therapeutic alliance is often misconceived, misunderstood, or ignored in conceptualizing the therapeutic process and the therapeutic relation in analysis and other forms of therapy. Conversely, I will argue that the alliance is indispensable in all forms of therapy. After briefly outlining the nature of the alliance, I discuss some of the empirical findings regarding its utility in various therapeutic contexts. I then consider its role and function in various therapeutic settings other than adult analysis and psychotherapy, including child analysis, treating various forms of psychopathology, and related contexts like supervision, forensic psychiatry, and hospital and medical treatment. The alliance plays a definite but analogous role in all of these, with differences according to context. (PsycINFO Database Record (c) 2010 APA, all rights reserved)