基于工作过程以项目团队模式完成高校工程毕业设计的改革实践

根据前期对本科毕业设计新模式的构想,结合笔者指导的2013年教学研究项目的实践,建立工程项目团队形式,通过各专业学生组建设计小组,并实施了校内外双导师制,通过以项目团队模式完成设计过程,学生受益匪浅。使学生意识到工作过程的团队精神,最终完成一份较为完整系统的工程设计书以及施工图纸。旨在为以后更好地实施教学项目和进行教学改革提供参考。     

基于刚‒柔耦合的反铲液压挖掘机工作装置多体动力学分析与仿真

以某型挖掘机为研究对象，建立其工作装置及挖掘阻力数学模型。针对土方、石方挖掘工况，采用压力传感器、位移传感器测得挖掘过程中各油缸的压力及位移，采用电阻应变片测出动臂与斗杆上各测点的应力。基于所获得的各油缸位移及压力，通过动力学分析计算载荷。使用有限元分析软件和动力学仿真软件建立挖掘机刚?柔耦合模型，并以各油缸位移曲线为驱动，得到动臂及斗杆上各点应力。仿真计算与应力测试的对比结果表明，对应测点的应力变化趋势基本一致，误差在15%以内。     

Equivalent nonlinear beam model for the 3-D analysis of shear-type buildings: Application to aeroelastic instability

Tower buildings can be very sensitive to dynamic actions and their dynamic analysis is usually carried out numerically through sophisticated finite element models. In this paper, an equivalent nonlinear one-dimensional shear–shear–torsional beam model immersed in a three-dimensional space is introduced to reproduce, in an approximate way, the dynamic behavior of tower buildings. It represents an extension of a linear beam model recently introduced by the authors, accounting for nonlinearities generated by the stretching of the columns. The constitutive law of the beam is identified from a discrete model of a 3D-frame, via a homogenization process, which accounts for the rotation of the floors around the tower axis. The macroscopic shear strain in the equivalent beam is produced by the bending of columns, accompanied by negligible rotation of the floors. A coupled nonlinear shear–torsional mechanical model is thus obtained. The coupling between shear and torsion is related to a non-symmetric layout of the columns, while mechanical nonlinearities are proportional to the slenderness of the columns. The model can be used for the analysis of the response of tower buildings to any kind of dynamic and static excitation. A first application is here presented to investigate the effect of mechanical and aerodynamic coupling on the critical galloping conditions and on the postcritical behavior of tower buildings, based on a quasi-steady model of aerodynamic forces.     

培养服务与教育引导: 当代高校辅导员工作新模式简

在高校学生服务与管理工作中，辅导员应该根据现代大学生新的特点来调整工作定位，创新工作方式，积极采取“培养＋服务”“教育＋引导”的渐进模式，把当代大学生培养成为人格健全、身心健康的社会主义建设者和接班人。     

Split least‐squares finite element methods for non‐Fickian flow in porous media

In this article, we introduce two least‐squares finite element procedures for parabolic integro‐differential equations arising in the modeling of non‐Fickian flow in porous media. By selecting the least‐squares functional properly the presented procedure can be split into two independent subprocedures, one subprocedure is for the primitive unknown and the other is for the flux. The optimal order convergence analysis is established. Numerical examples are given to show the efficiency of the introduced schemes. © 2012 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq, 2013     

Improved solution for inventory model with defective goods

This paper is a consequence for a paper of Lin et al. [S.W. Lin, Y.W. Wou, P. Julian, Note on minimax distribution free procedure for integrated inventory model with defective goods and stochastic lead time demand, Appl. Math. Model. 35 (2011) 2087–2093]. We simplified their complicated solution procedure and then presented a revision to patch their negligence for the boundary minimums. Numerical examples are provided to demonstrate our findings.     

能量转换量子系统的热力学特性及其研究进展

量子物理是理解微观粒子运动规律的现代物理学理论.它与信息、生命以及化学等学科相互联系日益紧密,引发了许多新技术革命,深刻影响着人类的生活,已成为社会经济发展的原动力之一.当前,量子物理和能源科学结合,正在产生新的学科生长点.本文主要概述多种类型能量转换量子系统的发展;结合国内外的研究现状,系统地阐明如何应用热力学理论研究量子体系的能量操控以及微观器件的优化设计;总结量子热力学循环、能量选择量子电子器件、量子点热管理器件等在理论和实验方面研究的代表性成果和进展;展望量子物理与能源科学交叉领域发展的新方向.     

90后大学生思想政治教育工作的新方法探析

阐述了90后大学生的思想特征,探讨了我国思想政治教育工作在方式方法上存在的问题,提出了90后大学生思想政治教育工作的新方法。