基于消息队列的分布式系统数据一致性方法研究

为在分布式环境下保持数据的一致性,结合一个实际的容灾系统,对维护分布式数据库数据一致性问题进行了分析.根据对当前数据一致性维护技术的研究和比较,提出一种基于消息队列技术的一种实现数据一致性的方法.该方法通过对数据同步的研究,保证了实际容灾系统在一定条件下的数据一致性.     

AHP中群组决策下综合判断矩阵的一致判定

定义了两种矩阵运算，说明了其性质，给出了如下结果：当各判断矩阵关于同一个一致性矩阵具有满意一致性，通过定义的两种矩阵运算得到的综合判断矩阵仍具有满意的一致性。     

AHP中群组决策下综合判断矩阵的一致性判定

定义了两种矩阵运算,说明了其性质,并给出了如下结果:当各判断矩阵关于同一个一致性矩阵具有满意一致性时,通过定义的两种矩阵运算得到的综合判断矩阵仍具有满意的一致性。     

不确定型AHP中几种新的排序方法及比较

研究了拟一致性矩及区间数一致性矩阵的性质，对不确定型ＡＨＰ给出了三种新的排序方法，证明了在判断矩阵为区间数一致性矩阵的条件下，这三种方法排序结果相同。     

改进AHP中判断矩阵一致性的一种新方法

提出了一种新的改进判断矩阵一致性的方法,即通过逐步修改原判断矩阵中的一对元素,并利用通用的一致性检验方法,使其一致性得到不断改进,最终达到一致性.并通过实验说明该算法简便、实用     

调整判断矩阵不一致性的一种新方法

利用一致性判断矩阵的特点和矩阵的初等变换思想,对于不满足一致性的判断矩阵,给出了一种一致性调整的新方法,并给出了具体的数值例子。     

基于模糊一致矩阵性质的正互反矩阵一致性调整方法

讨论正互反判断矩阵与模糊互补矩阵,正互反一致性矩阵与模糊一致性矩阵的关系,并对正互反判断矩阵的一致性提出了一种基于模糊一致性矩阵性质的调整方法.算例表明用该方法对判断矩阵的一致性进行调整工作量小且行之有效.     

基于Petri网的知识库检验方法

讨论了基于petri网的知识库一致性检验方法的实现;给出了知识库的一致性定义和Petri网建立知识库模型及一致性检验方法,为知识库的检验提供了一种有效方法.     

FAHP中的一致性与标度

检验模糊互补判断矩阵的一致性是FAHP应用的关键步骤,使用不同的标度系统构造矩阵,其满足的一致性也有所不同.FAHP中的一致性与其采用的标度之间的关系仍不清楚,故探讨了FAHP中模糊互补判断矩阵的加性一致性和乘性一致性的内在关系,给出了分别适应于这两种一致性的标度,为FAHP的正确使用提供了依据.     

一种新的群体一致性算法及平台实现

在分析已有两种主要群体一致性算法所存在问题的基础上,给出了一种新的群体一致性算法,该算法是用方差的大小来衡量群体一致性程度,有利于设定统一的阈值,并具体实现了新的群体一致性算法,运用该算法平台对某轿车厂家的一款新车型进行了快速、科学地决策,从新车型的市场反馈来看,该算法是有效的。     

不同粒度语言信息的群体一致性判别和改进方法

针对群决策中基于不同粒度语言判断矩阵形式偏好信息的群体一致性判断和改进问题,提出了一种新的分析方法.首先,根据专家给出的不同粒度语言判断矩阵,采用LOWA集结算子确定个体方案排序的序关系值向量;然后,以群体与专家个体意见偏差最小为目标建立目标规划模型,通过求解该模型得到群体方案排序的序关系值向量;进一步地,通过定义专家个体与群体意见的贴近度指标,给出了专家群体一致性的判别改进方法;最后,通过算例说明方法的可行性和有效性.     

Using new fusion operations to improve trust expressiveness of subjective logic

Subjective logic provides a means to describe the trust relationship of the real world.However,existing fusion operations it offers treat fused opinions equally,which makes it impossible to deal with the weighted opinions effectively.A.Jφsang presents a solution,which combines the discounting operator and the fusion operator to produce the consensus to the problem.In this paper,we prove that this approach is unsuitable to deal with the weighted opinions because it increases the uncertainty of the consensus.To address the problem,we propose two novel fusion operators that are capable of fusing opinions according to the weight of opinion in a fair way,and one of the strengths of them is improving the trust expressiveness of subjective logic.Furthermore,we present the justification on their definitions with the mapping between the evidence space and the opinion space.Comparisons between existing operators and the ones we proposed show the effectiveness of our new fusion operations.     

Method to Identify Similarity and Dissimilarity between Systems Engineering and Neighboring Disciplines

1IntroductionSystems Engineering(SE)has been widelyused in many fields worldwide since WWII.Despite beingin use for nearly70years,there islittle consensus onthe definitionandscope of SE,and it is very difficult to answer the question“What is SE?”exactly…     

Communication effect of passengers on information diffusion in metro emergency

Information diffusion is significant for emergency management as it can decide the severity of accidents. In this paper, we set up a communication model of passengers for the metro emergency. In the model, four categories of passengers are defined as unknown passengers, supportive passengers, neutral passengers and opposed passengers. Three passengers’ characteristics are taken into account, such as spreading desire, the trustworthiness and the passengers’ uncertainty about their opinions. From the simulation results, we can see that the passengers’ uncertainty about their opinions has a positive correlation with the time of passengers’ opinions reaching consensus, while other two factors both have a negative correlation. The result is useful for metro officials to guide and control emergency information.     

基于理性推理的观点演化模型

针对现实生活中个体观点形成中的理性推理过程,提出了一种基于DS(Dempster-Shafer)证据理论的观点更新规则,并在连续观点离散决策的框架下,对个体如何利用其他个体的意见和相关知识来形成自身意见的过程进行建模.实验仿真结果表明,群体中能够出现观点一致、分散等常见的舆论现象,观点演化过程中伴随着知识由确定性个体向不确定性个体的扩散,同时发现在规则网络中,意见领袖的观点的影响力在扩散过程中是逐渐减弱的,其影响范围与个体对知识不确定性的接受程度密切相关.     

Cook-Seiford函数的若干推广

用例子指出Cook-seiford函数所得的群排序的不唯一性，并利用计算机模拟实验说明这种情况出现的几率较大，提出Cook-Seiford函数的两种推广：加权的Cook-Seiford函数和基于Minkowski距离的Cook-Seiford函数；解决了Cook-Seiford函数结果不唯一的问题．推广的Cook-Seiford函数还可以用来进行多属性决策．     

关于加强领队与运动员的沟通能力的探讨

沟通的重要性越来越多地体现出来并逐渐应用于竞技体育领域,本文从理论的角度阐述沟通的重要性和技巧性,解决竞技体育工作者如何与运动员进行沟通的问题,使互通者在观点和看法上寻求共识,消除隔阂,谋求一致,达到相互理解和尊重。     

图书馆学研究对象综述

列举了关于图书馆学研究对象的几种代表性的观点,对各观点的成因进行了分析,探讨了图书馆学研究对象的确立原则和确立意义,希望早日形成一个能广泛达成共识的图书馆学研究对象。     

A novel endorectal RF coil for high resolution MRI and spectroscopy of the prostate

The diagnosis of prostate diseases by magnetic resonance imaging (MRI) in vivo is sometimes difficult for the lower signal to noise ratio (SNR). To increase the SNR of the prostate image, we designed a RF coil that can be inserted into rectum and was named endorectal coil. The properties of RF coil were evaluated using a network analyzer. Moreover the images and spectroscopy of a special phantom were acquired and the results were compared to those of the commercial TORSO coil (G.E. Medical Systems, USA). Our coil gave a significantly higher SNR at the region of interest (ROI). The achieved high local SNR and resulting high spatial resolution would add more anatomic and biochemical information to the diagnosis of prostate diseases.     

A novel endorectal RF coil for high resolution MRI and spectroscopy of the prostate

MRI is a non invasive powerful imaging tool andhas been used in the diagnosis of various prostate dis eases. The excellent soft tissue contrast provided byMRI allows improved visualization of the prostateanatomy, surrounding critical structures (such as theneurovascular bundles and periurethral zone), and theextent of tumor spread. This improved contrast reso lution presents a distinct advantage over otherprostate imaging modalities such as transrectal ultra sound and comp…