材料脆化对汽轮机组启动预热和超速试验温度的影响

分析了长期服役汽轮机转子产生的材料脆化现象，提出了老机组的启动预热温度和超速试验温度应以转子的脆性转变温度变化量△FATT为依据进行制定，才能预防转子的脆性破坏，确保老机组的安全可靠运行。     

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。     

Polarization Phase-Based Method For Material Classification In Computer Vision

A robust and accurate polarization phase-based technique for material classification is presented. The novelty of this technique is three-fold in (i) its theoretical development, (ii) application, and, (iii) experimental implementation. The concept of phase of polarization of a light wave is introduced to computer vision for discrimination between materials according to their intrinsic electrical conductivity, such as distinguishing conducting metals, and poorly conducting dielectrics. Previous work has used intensity, color and polarization component ratios. This new method is based on the physical principle that metals retard orthogonal components of light upon reflection while dielectrics do not. This method has significant complementary advantages with respect to existing techniques, is computationally efficient, and can be easily implemented with existing imaging technology. Experiments for real circuit board inspection, nonconductive and conductive glass, and, outdoor object recognition have been performed to demonstrate its accuracy and potential capabilities.     

花鼓式发电机用铁氧体磁体之探讨与展望

介绍了自行车上使用的花鼓式发电机的演变过程，分析了所用磁石，即铁氧体或钕铁硼的性能优劣，并进行了市场前景展望。     

电缆材料绿色化的两大指标——毒性和有害元素的检测和分析

采用了电缆材料绿色化的两大指标———毒性和有害元素含量的两种检测方法,即细胞毒性试验和电感耦合等离子体发射光谱仪法,认为这两种方法具有简便、精确、快速和省钱等优点,文中也提供了某电缆阻水膏和某种电缆护套料分别进行毒性试验和有害元素检测和分析。     

A fuzzy constraint satisfaction approach for electronic shopping assistance

The Internet and World Wide Web offer an additional channel for consumers to find, select, and buy products. However, unlike shopping in the traditional store, consumers have no direct contact with human clerks to get the required information in the electronic store. The objective of this paper is to propose a fuzzy constraint satisfaction approach to help buyers find fully satisfactory or replacement products in electronic shopping. For the buyer who can give precise product requirements, the proposed approach can generate product-ranking lists based on the satisfaction degrees of each product to the given requirements. For the buyer who may not input accurate requirements, a similarity analysis approach is proposed to assess buyer requirements automatically during his browsing process. The proposed approach could help buyers find the preferred products on the top of the ranking list without further searching the remaining pages. The experimental results show the applicability of the proposed approach for electronic shopping assistance.     

几种常用保温材料的应用比较

就空调工程中常用的几种保温材料的有关性能、用途及优缺点进行了应用比较.     

镁合金及镁基复合材料阻尼性能研究进展

简要介绍了纯镁、镁合金及镁基复合材料的位错型阻尼机理,叙述了温度、合金成分、组织结构和微观缺陷(包括晶界相界)以及热处理等因素对镁合金阻尼性能的影响.镁基复合材料较镁合金有较高的阻尼性能,是由于增加了多种阻尼机制的结果,其中最重要的是塑性区阻尼、位错密度的增大、界面滑移阻尼等.     

有机溶剂分离膜结构和膜材料设计理论研究

综述现存有机溶剂分离膜的不同结构特点，分析膜结构对溶剂渗透性能的影响．围绕溶剂渗透过程的溶解-扩散机理模型，重点阐述预测溶解性的溶液热力学理论和计算扩散系数的自由体积理论，强调化工热力学理论对新型溶剂分离膜开发的指导作用．在此基础上，提出膜材料和膜结构相互协调，利用物性推算法进行有机溶剂分离膜材料设计的思想．     

基于WEB方式的企业物料管理软件

企业物料管理软件系统采用了WEB浏览方式，用户界面友好、操作方便、查询功能强大、查询速度迅速，并支持模糊查询，可移植性较强，对客户端的软件、硬件平台无限制，只需装有浏览器即可。