广义KdV系统的形变映射解

在文[1]中，我们利用变形映射法，构造了Boussinesq方程与三次非线性Klein-Gordon(NKG)方程一类特殊类型解的代数变换关系，得到丰富的精确解。将上述方法进一步推广到广义的KdV系统。获得了该系统丰富的精确行波解，包括孤波解、周期波解和奇异解。     

模具热处理中失效变形的原因及其对策

模具热处理技术是确保模具质量、延长使用寿命的关键所在，本文试就模具热处理过程中常遇到的失效变形等问题进行分析并作出相应对策。     

Simple shear endochronic eqiations for finite plastic deformation

The endochronic equations proposed by Valanis (1980) were extended to a finite deformation range. Jaumann's rate,Fu's rate and Wu's rate were incorporated into the endochronic equations to analyze simple shear finite deformation. Incremental equations and numerical solutions are deduced for three endochronic objective models. The results show that an oscillatory shear stress response to a monotonically increasing shear strain occurs when the Jaumann's rate objective model is employed for endochronic materials. The oscillatory response is dependent on the adopted objective rate. Compared with the Jaumann's rate, the Fu's rate and the Wu's rate satisfy the restrictions to elastic-plastic constitutive relations and are in agreement with the experimental results.     

多孔超弹性矩形板中微孔的增长

The analyses of finite deformation and stress for a hyperelastic rectangular plate with some voids under an uniaxial extension were conducted. The governing differential equations were given from the incompressibility condition of the material. The solution was approximately obtained from the minimum potential energy principle. The growth of voids was discussed. One can see that an initial central circular-cylinder void becomes an elliptic-cylinder void, but an initial non-centeral circular-cylinder void becomes an elliptic-like cylinder void and the center of void has a shift. The stress distributions along the edges of voids were given and the phenomenon of stress concentration was observed. The influences of the distribution manner and size of voids, as well as the distance between them on the growth of voids were analyzed.     

大面积地面堆载下露天栈桥结构变形形态分析与设计策略

对大面积地面堆载条件下，露天栈桥的地基变形及其对基础和上部结构的影响进行分析和讨论，并结合工程实例，根据栈桥结构的变形形态，分析应采取的设计策略和预防措施。     

碳纤维片材加固技术在某工程框架梁抗剪加固中的应用

粘贴碳纤维片材加固技术是一项新的应用外粘高性能复合材料加固结构的技术．碳纤维片材重量轻、高强度、高弹性、高耐久性，易于施工，现已开始应用于各类混凝土结构的加固处理．本文根据工程实际情况，简要介绍了碳纤维片材加固技术在混凝土框架梁抗剪加固工程中的应用．     

高烈度区多层住宅短肢剪力墙结构设计

针对目前高烈度区多层砌体结构住宅存在的问题和粘土砖被淘汰,采用混凝土结构形式建造多层住宅成为住宅产业的发展方向。通过对各种混凝土结构形式的比较,得出短肢剪力墙结构是建造多层住宅的首选结构形式．并对短肢剪力墙结构设计中存在的一些问题进行了探讨,最后通过实例对多层短肢剪力墙进行了设计和计算．为在高烈度地区建造此类结构提供了设计参考。     

计算机模拟H钢冷却过程中温度场的变化规律

应用有限元软件SUPERFORM2002对经热轧后的H型钢在冷却过程中温度的变化进行了计算机模拟，得到了H型钢在冷却过程中温度场的变化规律。分析了相变对温度场计算的影响，并把计算值与实测值进行了对比，其结果表明：计算值与实验值吻合得较好。     

Writing centre tutoring sessions: addressing students’ concerns

The guiding principle behind university writing centres is to focus on the process of writing rather than the finished product, prioritising higher order concerns related to organisation and argumentation of texts rather than lower order concerns of grammar and punctuation. Using survey-based data, this paper examines students’ concerns regarding written texts in English and analyses whether there is a correlation between students’ and peer-tutors’ perceptions of help received/provided in the writing centre at Nanyang Technological University. The aggregate findings show that there is a significant correlation between their perceptions but a further sub-analysis that pairs individual student and peer-tutor responses reveals that there are discrepancies between their perceptions of the type of help received and provided. These findings not only reveal the type of feedback students prefer, whether global or local, but also whether there is a good fit between student needs and tutoring approach based on students’ nationality and English proficiency.     

岩石变形的基本理论--分析岩石有限测定及其地质意义

根据弹性力学研究在应力下物体内一点的应力状态.推理岩石在应力下发生应变,其有限变测量可研究地质构造的性质及形成机制、岩石变形前的状态、岩石圈区域性的系统应变测量.