基于AFM的微结构加工实验研究

本文建立了微动工作台和原子力显微镜相结合的微加工系统，在该系统上采用金刚石针尖进行微加工实验，与SPI系统本身的刻划软件刻划出的图形进行了比较分析，得出这个系统适合微结构的加工；并给出了采用该方法加工的1111面及多边形面微结构；还分析了金刚石针尖几何角度及SPM和工作台的相关参数对加工的影响。     

A Relational Model of Workplace Victimization: Social Roles and Patterns of Victimization in Dyadic Relationships.

This article proposes a model of the ways in which dyadic interactions between employees who occupy 1 of 4 archetypal social roles in organizations can lead to either episodic or institutionalized patterns of victimization. The model shows how the occurrence of victimization involving these 4 role types is influenced by organizational variables such as power differences, culture, and access to social capital. The model integrates behavioral and social structural antecedents of victimization to develop a relational perspective on the dynamics of harmful behavior in the workplace. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Grenzen der Anwendbarkeit der Theorie der analytischen Signale

Zusammenfassung Bei der praktischen Anwendung der analytischen Signale ist es erforderlich, die Ermittlung der Hilbert-Transformation numerisch durchzuführen. Dazu wurden u.a. Verfahren von H.W. Schü?ler, R. Unbehauen und G. Wunsch vorgeschlagen. In der Arbeit werden allgemeine Ergebnisse zur numerischen Umsetzung der Hilbert-Transformation dargestellt. Es wird gezeigt, da? alle praktisch realisierbaren Verfahren für bestimmte Signale divergieren. Damit ist es m?glich, die in der Experimentalphysik schon l?nger bekannten Schwierigkeiten bei der Umsetzung der Hilbert-Transformation zu erkl?ren.     

Transient elastic waves in a half-space: comparison of the DBIE-method with the method of generalized ray

Summary The two-dimensional problem of wave propagation in an elastic half-space is studied by the DBIEM (Direct Boundary Integral Equation Method) combined with the finite difference procedure applied to the time variable. The present hybrid formulation employs the fundamental solution depending neither on the frequency nor on the time variable. Time records of surface responses of the half-space are computed and compared with those obtained by the numerical evaluation of exact analytical solutions to this problem.     

Vibration of doubly-curved shallow shells

Summary This paper presents the free vibration of thin doubly-curved shallow shells of rectangular planform. The study covers wide combinations of free, simply supported and clamped boundary conditions. Both positive and negative Gaussian curvatures (spherical and hyperbolic paraboloidal shells resepectively) are considered. Thepb-2 Ritz energy based approach, along with the in-plane and transverse deflections assumed in the form of a product of mathematically complete two-dimensional orthogonal polynomials and a basic function, is employed to model the vibratory characteristic of these shells. Numerical results have been established through convergence study and comparison with published data from the open literature. Extensive sets of new results for various ranges of aspect ratio, curvature ratio andx- andy-shallowness ratios have been presented for future reference.     

水力喷射径向水平井生产管的工艺评定与检验

在URRS系统施工过程中 ,生产管处于多种变化复杂的应力和变形状态下 ,若出现失稳、渗漏、刺穿和断裂等事故 ,将造成巨大经济损失。为此 ,开展了水力喷射径向水平井用生产管的焊接方法、焊接设备、焊接工艺过程和焊接接头力学性能评定方法的试验研究。通过研究和试验 ,管材基本上实现了国产化 ,与之相匹配的焊接材料、焊接工艺以及质量检测技术已基本配套和规范化 ,形成了一套稳定的、可靠性较高且能完全满足现场工况的施工体系和质量保证体系     

移动通信系统中有效的身份认证方案和支付协议

文中给出了一个基于公钥密码的有效的身份认证和密钥交换协议，该协议可以实现通信双方的相互认证，产生的会话密钥对通信双方是公正的，且会话密钥的产生不需要其他第三方的参与，协议的结构简单，执行效率高：在此协议基础上设计了一个适用于移动通信系统的小额支付协议。     

柳钢2800mm中板轧机液压自动厚度控制系统

介绍了柳钢2800mm中板轧机液压自动厚度控制（HAGC0系统工艺参数与系统的结构、特点和功能。系统还包括平面形状控制、动态规程自动和控制轧制技术，构成一个较完善的控制系统。