异或开关函数的一种新综合方法

研究了异或开关函数的综合,以收缩b_j矩阵及分解b_j矩阵为工具,通过矩阵的最小秩和计算,提出一种不受固定极性限制的SSOP最小化算法,并通过实例比较,显示了该方法的优越性.     

On robust stabilization of uncertain stochastic time-delay systems—an LMI-based approach

In this paper, we first deal with the robust stability of uncertain linear stochastic differential delay systems. The parameter uncertainties are time-varying and unknown but are norm-bounded via two types of uncertainties, and the delays are time invariant. We then extend the proposed theory to discuss the robust stabilization of uncertain stochastic differential delay systems. These results are given in terms of linear matrix inequalities. Two examples are presented to illustrate the effectiveness.     

非负定方差阵下的证券组合投资决策模型研究

在用于度量投资风险的方差阵为非负定时，本文建立并研究了允许卖空与不允许卖空情形下证券组合投资决策模型，同时给出了计算最优投资比例系数的方法。     

分块广义幂等矩阵的广义Schur补的一些性质

给出了分块广义幂等矩阵的广义Schur补的一些性质,从而改进和推广了已有结果。     

一种改进的空域图像信息隐藏算法

基于可逆矩阵乘法,提出了一种基于LSB的空域图像信息隐藏算法。与基于Arnold置乱的算法相比,本文算法的时间和空间复杂度较低,且有较强的抗攻击能力。     

正定矩阵的性质及其应用

对正定矩阵的一些性质进行了整合,给出了正定矩阵的几个应用,并对这些应用中结论的证明作了进一步的补充.     

基于业务流程的电子资源引进与管理

简要叙述了电子资源引进与管理的基本情况。扼要论述流程管理基本原理、所具备的优点以及实施流程管理所需要的基本步骤和所要注意的基本原则,阐述了电子资源引进与管理的流程识别与分级方法,各流程的流程描述、责任/角色矩阵,以及落实到工作人员的责任/角色图,并提出电子资源建设流程的优化。     

基于扩展模糊概念网的信息检索结果个性化的研究

电子文档和用户的增长导致了信息检索结果个性化模式的创新,从而更好地为用户偏好服务.个性化的内容检索旨在改善检索过程中考虑个别用户的特殊兴趣.本文提出了一种基于扩展模糊概念网的信息检索结果的个性化的新方法.在这种方法中,网页和用户偏好都将以扩展模糊概念网形式表示.扩展模糊概念网可看作是关系矩阵和关联矩阵模型,关系矩阵中的元素代表模糊概念间的关系,关联矩阵中的元素表明概念间的关联度.这种方法的好处是能找到用户查询的绝大多数文档并且更灵活、更好地显示给用户.     

Role of Plasma MMP 9 levels in the Pathogenesis of Chronic Pancreatitis

Pancreatic fibrosis is a key pathological feature in the etiology of chronic pancreatitis that leads to obliteration of exocrine and endocrine pancreatic tissues and its replacement by fibrous tissue resulting in clinical manifestations. Matrix metalloproteinase 9 is a member of the MMP family that is also known as gelatinase B, degrades type IV collagen of extracellular matrix and basal membrane. The present study is aimed at evaluating the clinical significance of plasma concentration of MMP-9 in chronic pancreatitis. The samples were obtained from 112 chronic pancreatitis patients and an equal number of age and sex matched healthy controls. MMP-9 levels were quantitatively measured by ELISA assay. Statistical analysis was applied to test the significance of results. The present study revealed a significant increase of plasma MMP 9 levels in chronic pancreatitis patients compared to control subjects. Elevated levels were also observed in all the patient groups compared to control subjects with regard to sex, age, addictions etc. MMP-9 degrades the type IV collagens in normal basement membrane, which in turn activates the pancreatic stellate cells which promote the development of pancreatitic fibrosis. Thus, elevated plasma levels of MMP-9 may act as a susceptibility factor for the development of chronic pancreatitis.     

ICT领域跨学科关联度的块段模型分析——基于我国校企合作申请的专利

校企合作申请的发明专利能很好地反映高校科研成果供应与企业核心技术需求的对接。尝试以这类专利的主、次分类号为切入点,借助2009年OECD有关ICT领域的展望和政策,首次采用块段模型,分析该领域四大技术主题内部及其与非ICT领域间跨学科的技术关联,区别四大主题的技术路径依赖,挖掘技术平台,预测研发重点。助于我国ICT核心技术的把握和研发战略的布局,助于企业开展竞争情报分析,也为跨学科研究及其产业化提供了借鉴。