Reciprocal relations between rumination and bulimic, substance abuse, and depressive symptoms in female adolescents.

The authors examined the reciprocal relations between rumination and symptoms of depression, bulimia, and substance abuse with longitudinal data from 496 female adolescents. Rumination predicted future increases in bulimic and substance abuse symptoms, as well as onset of major depression, binge eating, and substance abuse. Depressive and bulimic, but not substance abuse, symptoms predicted increases in rumination. Rumination did not predict increases in externalizing symptoms, providing evidence for the specificity of effects of rumination, although externalizing symptoms predicted future increases in rumination. Results suggest rumination may contribute to the etiology of depressive, bulimic, and substance abuse pathology and that the former two disturbances may foster increased rumination. Results imply that it might be beneficial for prevention programs to target this cognitive vulnerability. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Review of Contributions toward evidence-based psychocardiology: A systematic review of the literature.

Reviews the book, Contributions toward evidence-based psychocardiology: A systematic review of the literature by Jochen Jordan, Benjamin Bardé, and Andreas-Michael Zeiher (see record 2006-13513-000). Reflecting a strong trend in the field towards evidence-based behavioural medicine, 10 systematic reviews of broad areas in psychocardiology are presented. Unfortunately, although the copyright date is 2007, the reviews focus largely on research published more than five years earlier, ignoring what are arguably the largest and most influential clinical trials and observational studies in behavioural medicine to date. The first chapter provides a comprehensive overview of the sociological aspects of the development and course of coronary heart disease (CHD). The final chapter is an examination of cardiac rehabilitation from a health systems analysis perspective. In between, the authors cover various psychological, psychosocial and medical aspects of CHD. The reviewers commend the editors for compiling an ambitious book on an important topic, but lament that its inconsistent approach is unlikely to completely satisfy physicians, behavioral medicine researchers or graduate students. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

共线界面裂纹问题的一个边界无单元法

借助于边界积分方程方法提出了一个适用于界面裂纹问题的无单元法.通过对不同情况界面共线裂纹问题的数值模拟,分析了界面裂纹之间的影响,算例证明该方法有效,且精度较高.     

低液限粉土的压实性能研究

结合子洲至靖边高速公路4个合同段的低液限粉土,采用试验和理论分析的方法,对该地区广泛存在的低液限粉土的压实性能进行了系统研究.首先,对该地区的低液限粉土进行了物理、力学性质试验,取得了基本的研究参数.其次,研究了低液限粉土的静力压实的机理和影响因素;基于长期稳定性的考虑,测定分析了CBR值,提出了考虑CBR值的低液限粉土的压实标准.     

大专学生心理健康状况的调查研究

关注大专学生的心理发展,加强心理健康教育,真正把他们培养成为德才兼备、情智并重、身心健康的社会主义建设者是高等教育面临的新课题。用Scl-90(症状自评量表)测试,对378名专科学生进行了心理健康状况的调查,目的是要了解和掌握大专学生的心理健康水平,分析影响大专学生心理健康的因素,寻找大专学生心理健康教育的主要途径。     

涂层中裂纹应力强度因子的计算及裂纹扩展

在涂层工作过程中，由于喷涂材料硬度高、抗裂性能差、喷涂工件刚性大工件表面产生应力集中，涂层很容易产生裂纹．对于含初始裂纹的喷涂材料，在拉伸载荷作用下裂纹的扩展与裂尖应力强度因子有很大的关系，根据断裂力学的基本原理，提出了利用数值模拟的方法来计算裂纹尖端的应力强度因子．并讨论了裂纹前沿网格划分对应力强度因子的影响，预测了裂纹扩展时形状的变化．     

Transient dynamic fracture analysis using scaled boundary finite element method: a frequency-domain approach

In the scaled boundary finite element method (SBFEM), the analytical nature of the solution in the radial direction allows accurate stress intensity factors (SIFs) to be determined directly from the definition, and hence no special crack-tip treatment, such as refining the crack-tip mesh or using singular elements (needed in the traditional finite element and boundary element methods), is necessary. In addition, anisotropic material behaviour may be handled with ease. These advantages are used in this study, in which a newly-developed Frobenius solution procedure in the frequency domain for solving the governing differential equations of the SBFEM, is applied to model transient dynamic fracture problems. The complex frequency-response functions are first computed using the Frobenius solution procedure. The dynamic stress intensity factors (DSIFs) are then extracted directly from the response functions. This is followed by a fast Fourier transform (FFT) of the transient load and a subsequent inverse FFT to obtain the time history of DSIFs. Benchmark problems with isotropic and anisotropic material behaviour are modelled using the developed frequency-domain approach. Excellent agreement is observed between the results of this study and those in published literature. The effects of the mesh density, the material internal damping coefficient, the maximum frequency and the frequency interval determining the frequency-response functions on the resultant accuracy and the computational cost are also discussed.     

The Maximum Levitation Force of High-T c Superconductors

In this paper we present the dependence of the maximum levitation force (F _z ^max) of a high-T _c superconductor (HTS) on the structural factors of high-T _c superconducting systems based on the Bean critical state model and Ampère’s law. A transition point of the surface magnetic field (B _s ) of a permanent magnet (PM) is found at which the relation between F _z ^max and B _s changes: while the surface magnetic field is less than the transition value the dependence is subject to a nonlinear function, otherwise it is a linear one. The two different relations are estimated to correspond to partial penetration of the shielding currents inside the superconductor below the transition point and complete penetration above it respectively. The influence of geometric properties of superconductors on the dependence is also investigated. In addition, the relation between F _z ^max and the critical current density (J _c ) of the HTS is discussed. The maximum levitation force saturates at high J _c . An optimum function of the J _c and the B _s is presented in order to achieve large F _z ^max.      

基于双因素理论的精神薪酬体系设计

激励在人力资源管理中有着极为重要的作用,双因素理论作为内容型激励理论的一种,对现代人力资源管理有着重要的指导意义,文章依据双因素理论,结合当前企业员工激励的实际情况,针对保健因素和激励因素的作用机理介绍了一系列企业员工激励的具体方式.     

ACS algorithm-based adaptive fuzzy PID controller and its application to CIP-Ⅰ intelligent leg

Based on the ant colony system(ACS)algorithm and fuzzy logic control,a new design method for optimal fuzzy PID controller was proposed.In this method,the ACS algorithm was used to optimize the input/output scaling factors of fuzzy PID controller to generate the optimal fuzzy control rules and optimal real-time control action on a given controlled object.The designed controller,called the Fuzzy-ACS PID controller,was used to control the CIP-I intelligent leg.The simulation experiments demonstrate that this controller has good control performance.Compared with other three optimal PID controllers designed respectively by using the differential evolution algorithm,the real-coded genetic algorithm,and the simulated annealing,it was verified that the Fuzzy-ACS PID controller has better control performance.Furthermore,the simulation results also verify that the proposed ACS algorithm has quick convergence speed,small solution variation,good dynamic convergence behavior,and high computation efficiency in searching for the optimal input/output scaling factors.