ANN valuation model of material LCIA profile

Weighting model is the only valuation model of life cycle impact assessment(LCIA) profile now. It simplifies evaluation function into linear function, and makes the determination of weighting factor complicated. Therefore the valuation of LCIA profile is the most critical and controversial step in life cycle assessment(LCA). Development on valuation models, which are understood easily and accepted widely, is urgently needed in the field of LCA.The modeling approaches for the linear evaluation function were summed up. The modeling approaches for the nonlinear evaluation function were set up by function approximation theory, which include choosing preference products, forming preference data, establishing artificial neural network(ANN) and training ANN by preference data.By selecting 7 material products as preference product, experience was done with modeling approaches of the nonlinear evaluation function. The results show that the modeling approaches and valuation model of the nonlinear evaluation function are more practical than the weighting model.     

面向网络化定制的产品族复合建模技术

在分析了网络化定制关键技术的基础上，针对性地对信息映射方法和产品族建进行了研究。提出了多层结构信息映射模型，以及综合类元件和参数化特征建模的双层复合产品族模型。结合本方法和以往网络化制造领域中所取得的成果，实现了较完整的基于Web的个性化定制过程。     

铜在雨水中的腐蚀行为电化学研究

采用电化学动电位扫描和交流阻抗研究了铜在模拟斯 德哥尔摩雨水中的腐蚀行为.铜表面存在少量腐蚀产物时，铜在雨水中的腐蚀主要由电化学 机制控制；随着腐蚀产物在铜表面的大量生成和沉积，存在腐蚀产物的区域和不存在腐蚀产 物的区域，形成了电偶腐蚀电池，腐蚀产物区为阴极.     

A Multi-layer Information Integration Platform for Chemical Process Operation Systems

In the process industry, automation and process control systems are widely implemented, information integration is however far away from satisfactory. It remains a hard job for senior managers to make decisions based on the plant-wide real-time integrated information. This paper proposes a multi-layer information integration platform. In the data integration level, the standard for the exchange of product (STEP) and the extensible markup language (XML) are used to unify these data of the chemical process. In the model integration level, the models are integrated by using the neutral model repository and CAPE-OPEN. In the integration of process task, the common object request broker architecture (CORBA) is used as the communication mediator. The XML is taken as the data standard. A uniform information platform is thus constructed and realized. The proposed information integration platform is satisfactorily implemented to solve the Tennessee Eastman (TE) problem.     

提高磷酸二铵产品质量方法浅析

针对磷酸二铵(DAP)产品养分波动大、含水量偏高、易结块、颜色变化大等缺点,在生产过程中采取了相应的解决措施,如配矿、联产、设备改造、工艺指标调整等,使DAP装置不仅保持了原有的优点,而且产品质量问题也得到了有效解决。养分基本保持在64.0%~64.6%,水分下降到2.1%~2.2%,结块现象较少,颜色也比较统一。     

2002年中国汽车工业动态

本简要描述了中国汽车工业的发展过程及发展前景、产品结构变化、产销量以及中国汽车生产企业状况等。     

快速发展的婴幼儿护理品市场

论述了美国婴幼儿护理品市场的现状，对目前美国市场上婴幼儿护理品品牌状况进行了分析。指出，婴幼儿护理品销售取决于特定年份的出生率。婴幼儿护理品市场有很大的发展空间，那些新型功能性的产品，以及环保、安全和对皮肤温和的天然产品仍然是婴幼儿护理品未来发展的主要趋势。     

新型CDCM催化剂在两段提升管催化裂化装置上的应用

CDCM催化剂在800 kt·a^－1两段提升管重油催化裂化装置（TSRFCC）上的应用结果表明,该催化剂具有活性高、目的产品选择性好、重油裂解能力强和抗重金属污染能力强的特点。能显著改善产品分布和提高产品质量，在操作条件基本不变的情况下，液态烃收率和总液收分别可提高2.80和0.60个百分点，同时汽油辛烷值和诱导期提高，液态烃中丙烯含量增加。     

以淀粉为原料的化工制品

综述了以淀粉为原料而得到的多种化学品的性质和应用。淀粉来自可更新资源，具有良好的可获得性，而且价格低廉，因此某些以淀粉为原料所得到的化学品与来自其他资源的化学品(例如石油化学品等)相比，具有较多的优越性。重点介绍的这类化学品有：表面活性剂、超强吸水剂、可生物降解塑料、絮凝剂和粘结剂等。     

加入WTO我国成品油行业的对策及措施

分析了我国成品油行业现状和加入WTO带来的影响，以有国内该行业的竞争力水平。为应对加和WTO以后的新形势，研究了我国成品油行业在生产和销售领域需要采取的措施，并向政府提出了在加强宏观管理、营造公平合理的竞争环境方面的几点建议。