Nonlocalized Fatigue Damage of Metals and Alloys. Part 2. Interrelation between Fatigue and Inelasticity

The paper considers interrelation between the regularities in the fatigue fracture and inelastic deformation taking into account the material properties, stress gradient and concentration, specimen size, load cycle asymmetry, complex stress state, temperature, loading frequency and conditions, scatter of the test results. Analysis of the data from the literature and results of original investigations has shown that the characteristics of inelasticity, which define nonlocalized fatigue damage, can be used in studies of general regularities of the high-cycle fatigue fracture. Specific results of such analysis are presented. __________ Translated from Problemy Prochnosti, No. 5, pp. 5 – 29, September – October, 2005.     

参数自调整PID模糊控制器及在数字随动系统中的应用

结合传统PID的控制原理，介绍一种参数自调整的PID模糊控制器。开发了一套能在线调整PID参数的模糊控制方法的软件，并分别将它和传统的PID控制器作用到数字随动系统中。对二者的控制结果进行了比较。实验结果表明，参数自调整PID模糊控制器使系统稳态性能优良，并能提高控制精度。     

Electronic Commerce Customer Relationship Management: A Research Agenda

In this paper, we approach electronic commerce Customer Relationship Management (e-CRM) from the perspective of five research areas. Our purpose is to define a conceptual framework to examine the relationships among and between these five research areas within e-CRM and to propose how they might be integrated to further research this area. We begin with a discussion of each of the research areas through brief reviews of relevant literature for each and a discussion of the theoretical and strategic implications associated with some CRM technologies and research areas. Next we present our framework, which focuses on e-CRM from the five research perspectives. We then present a theoretical framework for e-CRM in terms of the five research areas and how they affect one another, as well as e-CRM processes and both performance and non-performance outcomes.     

一种新型智能模糊控制器的研究

从模糊控制器量化因子入手，对其进行了深入的分析，提出了一种智能型的模糊控制器结构。其中，智能调节器使量化因子随控制不同阶段而动态变化。文中对智能调节器的设计过程作了介绍，并对两个被控对象分别用基本模糊控制器和基于智能调节器的模糊控制器的控制效果进行了分析比较。仿真例子证明了智能模糊控制器的有效性。     

纤维缠绕外压容器稳定性最佳铺层分析

在纤维缠绕压力容器设计中，纤维缠绕的方向及各方向纤维用量配比是关键问题。过去的研究中，这一问题一直没能得到很好地解决，特别是各方向纤维用量问题。本文在文献［１～４］的基础上，以加权因子和铺设角为参量给出了对称多层正交各向异性外压容器筒体失稳的最佳铺层理论值。得出了加权因子ｓ取最佳值的范围为０＜ｓ＜０．２５的结论。文中算例表明，按最佳取值给出的临界压力较其它情况有较大幅度的提高。     

Stress intensity factors for an interfacial crack between an orthotropic half-plane bonded to a dissimilar orthotropic layer with a punch

The plane strain problem of determining Stress Intensity Factors (SIF) for a moving interfacial Griffith crack between an elastic orthotropic half-plane and a dissimilar orthotropic layer with a moving punch situated along the boundary of the layer have been considered. The problem is reduced to the solution of three simultaneous singular integral equations with Cauchy-type singularities. Expressions for SIF for the case of a general loading are obtained. Numerical results for some particular cases are also presented graphically.     

煤焦油质量的影响因素及对策

通过对涟钢煤焦油质量变差的原因分析，认为其关键因素是焦炉装煤不满．炉顶空间过大和温度过高，造成荒煤气中游离碳含量太高。据此。逐步采取了相应的措施，使焦油质量得到有效改善。     

CaO基粉剂铁水脱硫影响因素研究

在实验室条件下对不同配比的CaO基粉剂进行铁水脱硫实验，结果表明，适宜的CaO基铁水脱硫剂组分为：m(CaCO3)／m(CaO)=0．20～0．40，w(CaF2)=6％～10％及叫w(C)≤10％。在宝钢的铁水脱硫实际中，铁水温度、铁水初始硫含量、喷粉速度等都会影响脱硫率。     

钛酸锶压敏陶瓷及其性能影响因素

为了提高SrTi03压敏陶瓷的性能，对其影响性能的因素进行了论述，指出主要影响因素是配方体系及制造工艺中的绕结工艺，并指出改善SrTi03综合性能的途径是进一步提高瓷料配方的适应能力并完善制造工艺。