天铁炼钢厂板坯漏钢原因分析及预防

针对天铁板坯连铸机一年多来发生的漏钢事故，分析了产生的原因，提出了预防改进的措施，对今后的生产有很好的指导意义。     

绿色环保型水-乙二醇抗燃液

介绍了环保型水一乙二醇液压液的发展状况及性能特点，对比了环保型水－乙二醇液压液与其它润滑材料的生物降解性，表明这类水－乙二醇液压液是极具发展的环境友好型的抗燃液介质。     

Urban growth and environmental degradation: The case of Cairo, Egypt

The immense growth of cities, especially in developing countries, is resulting in the urbanization of both poverty and environmental degradation to a greater degree than ever before. This paper examines the processes of growth and degradation in the Greater Cairo Metropolitan Region (GCMR), currently the world’s tenth largest mega-city. It reviews the region’s growth and selected environmental issues as well as impacts of current efforts on managing the region. The assertion of this paper is that current management policies and bodies lack a comprehensive view of urban governance for the region, which does not bode well for the future environmental and economic sustainability of the region.     

软体排在长江江新洲堤岸加固工程中的应用

介绍了长江江新洲堤段应用软体排护岸新型技术的情况，结合长江江新洲护岸工程对软体排施工、工艺、设备作简要叙述。     

液控式修井井下开关的研制

为实现采油井的无污染作业 ,研制了液控式修井井下开关。这种开关除具备自控式井下开关的所有功能外 ,又增加了液控功能。当油井进行检泵作业时 ,在地层压力较大的情况下井下开关能自动关闭 ,作业完毕关井稳压 ,当阀体上下压力达到平衡时 ,阀体下落 ,开关可自动打开 ;当地层压力较小时 ,井下开关不能自动关闭 ,作业过程中井口会产生溢流 ,这时可通过地面加液压将开关关闭 ,作业完毕再向井内加液压可将开关打开 ,油井即可恢复正常生产。该工具的推广应用不仅降低了采油成本 ,而且对防止油层污染 ,保护环境均具有重大意义。     

JSL系列电子计长仪及其在纺织设备上的应用

介绍了JSL系列电子计长仪的原理，特点以及在纺织行业多种设备计长控制方面的应用，可替代原已失效的机械式计长装置，运行可靠，计长准确，投资少，效率高。     

WC对铜基和镍基喷焊覆层材料耐气蚀性能的影响

在CuNiSiB,NiCrSiB自熔合金粉末中添加WC陶瓷颗粒，利用氧乙炔焰粉末喷焊工艺制备覆层材料，用超声波振动气蚀仪对覆层材料进行耐气蚀性能研究，用扫描电子显微镜对覆层材料表面气蚀破坏形貌进行观察，结果表明：复合覆层材料的耐气蚀能力比基体强；提高CuNiSiB覆层材料耐气蚀能力的途径是强化晶界，还探讨了覆层材料的气蚀破坏机理。     

Hiding iris data for authentication of digital images using wavelet theory

This paper introduces an efficient approach to protect the ownership by hiding an iris data into digital image for an authentication purpose. It is based on the theory of wavelets. The idea is to secretly embed biometric data (iris print) in the content of the image identifying the owner. The system is based on an empirical analysis of biometric and watermarking technologies, and it is split into several processes. The first process is based on iris image analysis, which aids the generation of the iris code (watermark); the second and the third processes deal with embedding and detecting a watermark; and the last process deals with the authentication. A new metric that measures the objective quality of the image based on the detected watermark bit is introduced, which does not require the original unmarked image for watermark detection. Simulation results show the effectiveness and efficiency of the proposed approach. The text was submitted by the author in English.     

水文自动测报系统防雷的探讨

水文自动测报系统若配备有线／无线（GSM，GPRS）双通道，可提高系统的可靠性，保证系统的畅通。然而，有线组网方式最致命弱点是防雷能力差，针对防雷问题，在实践中探讨其有效途径，论述接地装置的设计、安装中应注意的几个问题，并介绍在实践中电话线防雷从一级防护发展到三级防护，提高防雷的效果，有待在实践中，再认识，再提高。     

ODS技改项目的实施与环境保护

实施 ODS技术改造项目 ,是履行《蒙特利尔议定书》的重要举措。本文论述了如何利用国际 ML F多边基金组织的赠款做好工商制冷设备的制冷剂替代和设备改造的技术工作 ,阐明了 ODS技改项目的实施对环境保护和企业发展的深远影响