高职学校教师职业压力分析

本文通过对山东省9所有代表性的高职院校388名教师进行的问卷调查,发现高职学校教师的职业压力在年龄、教龄、平均周课时、学历、任教科目、是否担任实训课、是否担任班主任等方面存在显著差异.本文结合调查结果,从社会、学校、教师自身三个方面对减缓高职教师职业压力提出相应对策.     

基于弹性大挠度理论的幕墙玻璃设计

根据弹性薄板大挠度理论,运用加权残值法分析计算幕墙玻璃的挠度和应力,并与幕墙玻璃规范设计进行比较,结果表明,基于非线性理论的设计计算是可行的.     

基于FDTD的由粗到细网格逐步逼近计算电磁场

提出一种基于FDTD的由粗到细网格逐步逼近计算电磁场的方法,并应用于内置带裂缝的金属谐振腔的电磁场的计算。结果表明:该方法与标准FDTD方法计算电磁场的精确度一致,但计算时间则明显少于后者。     

褶皱变形应力场对断裂控制作用的有限元模拟

有限元法作为一种求解连体力学问题的有效方法,已经广泛应用于地质领域,本文对软硬夹层的紧闭褶皱的变形应力场进行了二维有限元数值模拟。数值模拟结果表明,在本文的模拟条件下,裂隙的发育位置受破裂指标Fn大于3．0的高值点控制．高值点的密度决定了断裂发育的多少：裂隙的延伸方向与模拟的剪切应力方向一致：裂隙的前端具有代表应力集中的Fn指标值的高值点,断裂沿此生长;当断裂延伸至褶皱核部发生分又与合并时,应力梯度下降,应力对断裂的控制能力减弱。研究结果对于有限元法应用于实际地质问题具有重要意义。     

空心圆柱仪(HCA)性能指标分析及同类产品比较

从量程控制、频率匹配、传感器种类和精度的选择等三个方面分析了甄选HCA仪的主要要素。同时对目前国际上具有代表性的一些空心圆柱仪在试样尺寸、加载能力和测量精度以及工作频率等方面的性能进行了比较,并着重强调了其在研究主应力轴旋转问题中的工作能力,这些分析对比工作对研究者根据自身的试验要求来选购和开发同类仪器具有参考价值。     

Networks of Passing: Experiences of Undocumented Latin American Immigrants’ Identity Negotiation

Undocumented Latin American immigrants are one of the fastest-growing populations in the United States, and they are one of the most vulnerable. Due to constant fear of deportation, these immigrants have to communicatively “pass” for documented in a variety of situations, and they might be likely to use informal network ties (social capital) to do so. Through eight diverse focus group interviews of undocumented immigrants, this study explores how this population passes. Undocumented immigrants used talk, the body, or documents to pass either individually or through network members. Implications for both theory and practice are discussed.     

社交舞学习动机与情绪和工作压力的关系

摘要：探讨人们学习社交舞的动机,以及学习社交舞对情绪和工作压力的影响。439名SALSA舞爱好者参加了本研究。通过探索性因素分析和验证性因素分析,发现社交舞学习动机问卷有展现自我魅力、改善社交能力、提升自我修养和快速入门学习4个因素。问卷具有良好的信度和效度,4个因素与跳舞频率、跳舞热情、舞龄和情绪呈现了不同的相关。通过横向研究发现,无论舞龄长短,跳舞组都比做其他体育运动组报告了更高的正性情绪。通过纵向研究发现,长期（3.5周）和短期（1.5 h）学习社交舞均显著提高了正性情绪和降低负性情绪,但工作压力只在长期跳舞后才有显著降低。本研究对于如何吸引人们参与体育运动有重要的科学参考价值。     

IT业知识型员工工作压力研究

采用抽样调查和样本分析的方法,从IT业知识型员工现实的身心疲劳状况入手,通过对工作压力源、员工人格特质和反应方式的分析,深入探讨了IT业知识型员工工作压力的成因,提出了对知识型员工工作压力的管理策略。     

桩-网复合地基桩土应力比试验研究

桩-网复合地基是近年来兴起的一种软弱地基处理方法,它能够充分发挥桩、网、土的各自作用,有效地控制工后沉降.针对目前设计中缺乏相关数据的现状,按桩体种类设计了两个试验区对桩-网复合地基的桩土应力比变化规律展开研究,得到一些有益的结论.试验结果为桩网复合地基理论研究和优化设计提供了依据.     

Strain in perovskite solar cells: origins,impacts and regulation

Metal halide perovskite solar cells (PSCs) have seen an extremely rapid rise in power conversion efficiencies in the past few years. However, the commercialization of this class of emerging materials still faces serious challenges, one of which is the instability against external stimuli such as moisture, heat and irradiation. Much focus has deservedly been placed on understanding the different origins of intrinsic instability and thereby enhancing their stability. Among these, tensile strain in perovskite films is an important source of instability that cannot be overcome using conventionally extrinsic stabilization approaches such as encapsulation. Here we review recent progress in the understanding of the origin of strain in perovskites as well as its corresponding characterization methods, and their impacts on the physical properties of perovskites and the performance of PSCs including efficiency and stability. We then summarize the latest advances in strain-regulation strategies that improve the intrinsic stability of perovskites and photovoltaic devices. Finally, we provide a perspective on how to make further progress in stable and high-efficiency PSCs via strain engineering.