EPON技术在用户宽带接入网中的应用

本文介绍了EPON技术的系统组成及原理,分析EPON技术的优势,探讨了EPON技术在宽带上网中应用的几种方式,总结了EPON技术将成为未来宽带接入网的发展方向。     

论企业核心竞争力的培育

核心竞争力是当今企业经营管理理论的前沿和实践的热点之一，企业只有拥有核心竞争力，才能在激烈竞争的市场中取得竞争优势，加入WTO后的国内企业临着严峻的生存压力，当务之急是培育核心竞争力，迎接全球经济一体化的挑战。     

Barriers and benefits of the implementation of food safety management systems among the Turkish dairy industry: A case study

The aim of this research was to determine the barriers and advantages of the Hazards Analysis and Critical Control Points (HACCP) and food safety programs (FSPS) employed by the dairy industry in Ayd?n, Turkey. By conducting face-to-face interviews and using questionnaires, the structure of Ayd?n dairy plants’ food safety management systems was characterized. The questionnaires elicited information about the applications of food safety systems, dairy plant managers’ opinions about any inspection systems, and their expectations for government and local legal authorities in food safety systems. Twenty-eight operating dairy plants in Ayd?n with a production licence from the Ministry of Food, Agriculture and Livestock show activity in the sector for more than 10 years (53.5%) with joint-stock or limited company status (60.7%). These plants produce white cheese, fermented milk products and butter. Implementing a clear and efficient food safety management system can improve legal issues (85.7%) and increase client trust (64.3%). This is positively correlated with the ages of dairy plant managers in the dairy industry in Ayd?n (p < 0.05 and p < 0.01). All the same, not understanding the HACCP was specified as one of the main barriers to its utilization. Almost half of managers (46.5%) reported not really knowing what HACCP was, while 35.8% reported that it was too expensive to employ. On the other hand, the main difficulties with prerequisite program (PRP) applications in Ayd?n dairy plants was determined to be a result of insufficient physical conditions (35.7%) and cost (46.4%).A lack of knowledge relating to and the cost of HACCP and other food safety programs were the main barriers to implementation in the Ayd?n dairy industry. Providing periodical training and consultation services for FSMS applications in the dairy industry by the government and also providing financial support must be provided.     

简易洁净工作台的实际应用

分析国内洁净工作台的使用现状，讨论简易、组合式洁净工作台的优势及具体运行效果。     

直接加热式热风炉和新型换热器的研究与开发

文章介绍了由炉膛与换热器组成的直接加热式热风炉(空气加热装置)以及由内螺纹外肋片铸铁管组成的新型换热器的优越性与完整设计方法。     

南京市湖南路商业中心发展研究

通过对南京市湖南路商业中心发展回顾和现状特征总结,指出湖南路商业中心发展存在的问题,在分析湖南路商业中心发展优势和潜力的基础上,认为湖南路商业中心应当重视功能协同,重点发展湖南路东部地区,进行用地置换,完善商业中心空间结构和综合交通体系,以促进商业中心的进一步发展     

既有建筑结构隔震加固原理与应用现状

隔震技术的发展为既有建筑物的抗震加固开辟了新途径。本文深入分析了隔震加固技术的基本原理 ,总结了隔震加固技术在国内外的研究和应用现状 ,并据此指出了隔震加固技术的优越性 ,提出了隔震加固技术今后应加强研究的若干问题。最后 ,对这一技术在我国的应用前景作了预测。     

双层皮玻璃幕墙技术分析

本文对欧洲应用较为广泛的双层皮玻璃幕墙技术的定义和发展过程做了概要介绍,就双层皮玻璃幕墙的分类和优缺点进行了总结,同时结合5例运用双层皮玻璃幕墙技术的欧洲设计实践进行了实例分析。     

湿式离合制动器在热模锻压力机上的应用现状分析

热模锻压力机上广泛应用的湿式离合制动器按离合器与制动器的布置形式可以分为分体式离合制动器和组合式离合制动器。湿式离合制动器以液压油作为工作介质,整个离合器、摩擦器腔内充满了液压油,主动轴和被动轴间的扭矩传递通过油膜间的抗剪力实现。本文着重介绍当前热模锻压力机上应用的湿式离合制动器的结构类型及相关产品,并对其关键零部件摩擦片的研究现状进行了归纳分析。