关于和式极限的探求

介绍了利用极限定义、Stolz公式两种求和式极限的方法,着重分析了利用等价代换求和式极限及其存在的误区,较好地解决了一类特殊"和式"的极限问题.     

基于代入法的约束线性模型的参数估计

本文利用代入法研究带约束条件的一般线性模型的参数估计问题，当线性模型中固定效应参数β附带线性约束条件时，在不同的协差阵和设计阵结构下，提出了可估函数c′β的约束估计，并给出其优良性质。     

一类二阶常微分方程组求解的简便方法

采用变量代换、降阶和欧拉方法,给出了一类含未知函数一阶导数项的二阶常系数非齐次线性微分方程组的通解,并通过算例验证了通解公式的正确性。     

试析对外经贸对区域经济发展的促进作用

根据发展经济学和国际贸易理论 ,系统阐述对外经贸对区域经济发展的促进作用     

我国古代对外贸易中的进口替代

列举了我国古代对外贸易中一些自发的“进口替代”现象，分析了进口替代发展战略在一些国家经济发展史上所起的作用，并指出，我国目前应该实行进口替代战略，以此来发展和壮大我国的装备工业。     

新型面粉增筋剂的研究

采用复因素和三因素二次回归正交实验对新型面粉增筋剂进行了研究。结果表明 ,取代度为 0 .36 84,添加量为 5 %的玉米淀粉磷酸酯和 0 .3 %的明矾结合作为面粉增筋剂效果最好 ,加入后可使面粉湿面筋含量由 2 3 .6 85 %提高到 2 9.874%。     

比喻喻体的模糊性及翻译对策--《红楼梦》比喻译谭

中国古典名著《红楼梦》中使用了丰富多彩的比喻手段，它们通常具有强烈的民族色彩和独特的文化意义，本文作者从比喻喻体的模糊性着手。详细探讨了它们的翻译方法，作者认为应充分考虑英汉两个民族的文化差异，在“信”和“达”的前提下。结合语境采用对等沿用，迁移变换，取神舍形等多种方法灵活翻译。     

Technical Note ：SINGLE-PERIOD TWO-PRODUCT INVENTORY MODEL WITH SUBSTITUTION： SOLUTION AND PROPERTIES

In this paper, we study a single-period two-product inventory model with stochastic demands and downward substitution. The optimal order quantities are presented and some properties are provided. Comparing with newsboy model, we prove that both the profit and the fill rate can be improved by using the substitution policy. This work was supported partly by NSFC/RGC Joint Research Program under grant 79910161987 and the National Science Foundation of China (79825102, 70231010, 70321001). Lianqiao CAI is lecturer of School of International Business, Beijing Foreign Studies University. He received his B.S. and M.S. from School of Economics and Management, Tsinghua University, in 1995 and 1998, and Ph.D of Management Science from Tsinghua University in 2002. His research areas include supply chain management, optimization techniques. Jian Chen is Professor and Chairman of the Management Science Department and co-director of the Research Center for Contemporary Management, Tsinghua University. He has over 80 papers published in some leading international journals and first class Chinese journals, and has been a principal investigator for over 20 grants or research contracts with National Science Foundation of China, governmental organizations, and companies. His main research interests include supply chain management, E-commerce, modeling and control for complex systems, decision support systems and information systems, and forecast and optimization techniques. He serves as associate editor of the “IEEE Transactions on Systems, Man and Cybernetics: Part A” and “IEEE Transactions on Systems, Man and Cybernetics: Part C”, and on the Editorial Board of “The International Journal of Electronic Business” and “System Research and Behavioral Science”. He is the recipient of the Outstanding Contribution Award of IEEE Systems, Man, and Cybernetics Society in 1996, and the Young Scientist Award of China in 1992. He was Secretary General of the 1996 IEEE International Conference on Systems, Man, and Cybernetics in Beijing, Co-chair of the IPC of 1998 International Conference on Systems Science and Systems Engineering, Chair of the First Asian eBiz Workshop in 2001, Co-chair of the Asian eBiz Workshop in 2002 and 2003, and Co-chair of the international conference on Global Supply Chain Management in 2002. Houmin Yan received his B.S. and M.S. from the Department of Automation, Tsinghua University, in 1982 and 1985, respectively, and his Ph.D. from the Faculty of Management, University of Toronto in 1993. From Jan. 1994, he is with the Department of Systems Engineering and Engineering Management, the Chinese University of Hong Kong as an Assistance, Associate and Full Professor. He was a tenured Associate Professor at School of Management, the Univ. of Texas at Dallas. His main research areas are operations management, stochastic models, simulations, and supply chain management. He has published in journals such as Operations Research, Manufacturing and Service Operations Management, Production and Operations Management, Journal of Optimization: Theory and Applications, IIE Transactions and IEEE Transactions. He consults several high-tech companies, such as Motorola, C&K Systems, and Oriental Power, on issues spanning from production planning and scheduling, supply chain management to business process re-engineering. He is a member of INFORMS.     

酉几何上Cartesian认证码的构造

利用有限域上的酉几何构造一个Cartesian认证码，计算了认证码的参数，并假定按照等概念分布选择编码规则，计算了成功模仿攻击概率PI和成功替换攻击概率Ps，它们都达到了最优或接近最优，这一结果为实现一些好的实用认证技术在理论上提供了可靠的基础，也给出了在有限域上构造Cartesian认证码的技巧。     

对化学浆氯化过程的认识

论述了纸浆的氯化过程以及改进措施，给出了有效氯加入量和漂白废液有机物产生量的计算方法。表明采用较高的二氧化氯取代率氯化、１００％二氧化氯氯化以及高剪切中浓混合器的应用，是减少废液污染的有效手段。