关于线性规划问题解的讨论

用矩阵的奇异值分解和广义逆讨论标准线性规划问题解的存在性和唯一性问题。     

S2Cl2异构体最大硬度原理的密度泛函理论研究

在LDA／NL水平研究了最大硬度原理(MHP)在S2C12分子旋转异构化过程中的真实性。报告了S2C12分子在键的旋转异构化过程形成的各种异构体分子的硬度、化学势和总能量的计算值，并由此得出重要结论：①在分子旋转异构化过程中，硬度最大的分子能量最小，而硬度最小的分子能量最大，用计算的硬度表征S2Cl2异构体的稳定性与计算的总能量表征S2C12异构体的稳定性相当吻合，从而使最大硬度原理被进一步证实。②虽然化学势不宜表征异构体的稳定性，但是恒定的化学势是最大硬度原理成立的重要条件。     

电话会议系统中电话事件状态及状态转移设计

以一个电话会议汇接系统的设计开发为例，针对电话会议汇接系统的实时性、多任务的特点，运用有限状态机模型，从状态和状态转移的设计入手，结合面向对象程序语言编程，探讨此类系统的软件设计的思路和方法。     

菠菜色素的提取及性能测试

本文研究了菠菜色素的提取工艺,以及色素对光、热、酸、碱的稳定性,为天然色素的提取和应用提供了科学依据。     

A complete sequence and comparative analysis of a SARS-associated virus(Isolate BJ01)

Severe Acute Respiratory Syndrome (SARS) is a newly identified infectious disease[1—5]. The global outbreak of SARS has been threatening the health of people worldwide and has killed 353 people and infected more than 5462 in 27 countries, as reported by WHO on April 29, 2003 (http://www.who.int/csr/sarscountry/en). Although it has been recognized that a variant of virus from the family of coronavirus might be the candidate pathogen of SARS[1—5], its identity as the unique pathogen sti…     

Advances in identification and application of tumor antigen inducing anti-cancer responses

Tumor antigen is one of the important bases of tumor immunotherapy . With the discovery of novel tumor antigens, interest in specific immunotherapy for treatment of malignancies has increased substantially. Nowadays more and more scientists paid close attention to various tumor antigens with their roles or/and applications in anti-cancer immune responses, immune tolerance, tumor markers,     

三河湿地自然保护区水禽资源初步调查

2 0 0 1-2 0 0 3年对三河湿地自然保护区水禽资源进行了调查 ,结果表明 ,本区共有鸟类 7目 13科 5 6种 ,其中古北界鸟类 43种 (76.79% ) ,东洋界鸟类 7种 (12 .5 0 % ) ,广布型鸟类 6种 (10 .71% ) ,湿地水鸟组成呈现南北交错 ,以古北界为主的特征 .繁殖水鸟 10种 ,占 17.86% ,非繁殖鸟 46种 ,占 82 .14 % .在繁殖鸟中 ,古北界有 2种 ,东洋界 4种 ,广布种 4种 .     

一种基于轮廓特征的图像拼接算法设计与实现

提出了一种新的基于轮廓特征的图像拼接算法。在特征提取阶段 ,对卷积图进行增强 ,并用区域增长方法进行辅助校正 ,能改善轮廓提取效果 ;在特征表示方面 ,用形状签名代替链码来描述轮廓 ,从而提高了计算速度 ,降低了由噪声干扰和镜头形变造成的影响。实验结果表明 ,该算法在速度上优于基于链码的配准算法 ,准确率高 ,并且可以适用于未经过几何形变校正的图像的配准与拼接。     

新课程下的数学教师培训

师资培训工作是课程改革实验工作的关键。其中，观念的转变是教师培训的核心内容，为了适应新课程，数学教师的数学观、数学学习观、数学教学观、数学评价观都需要做很大的调整。同时，数学教师的知识面和能力也需要拓广，促使教师改变的培训方式是多样的，案例加反思是具有代表性的一种方式。     

A UDDI Based Shared Resources Management Mechanism in Virtual Enetrprises .

Service and information resources are two kinds of major shared resources in virtual enterprises, where, service resources include third party‘s service resources and enterprise‘s legacy service resources, and information resources include database resources and file resources. Since service and information resources have distributed, autonomic, remotely bound as well as some other similar characteristics, an implementation mechanism on managing shared resources based on UDDI are presented. XML instances are used to describe resources authorization information, WSDLbased special XML instance represents information resource metadata, and these XML instancesare referenced by tModel for realizing the purpose of managing shared resources metadata based on UDDI.