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1.
工作流模型中多粒度时间约束描述及其分析   总被引:9,自引:0,他引:9       下载免费PDF全文
杜栓柱  谭建荣  陆国栋 《软件学报》2003,14(11):1834-1840
流程的分布性要求工作流模型中时间约束可以采用不同的时间粒度来度量.为此,定义了工作流模型MG-TWF.通过多粒度相对时间约束、多粒度绝对时间约束及多粒度时间约束工作流网概念,从MG-TWF模型的静态建立阶段、动态运行阶段及模型的网结构方面描述其多粒度时间约束.并在此基础上建立了MG-TWF模型的多粒度时间约束工作流网、多粒度相对时间和多粒度绝对时间约束一致性问题的一般分析方法.最后给出一个具体MG-TWF模型的一致性分析实例.  相似文献
2.
基于多粒度权限的访问控制   总被引:6,自引:0,他引:6       下载免费PDF全文
基于角色的访问控制在权限管理中得到广泛的应用。在实际系统中,通过对系统权限的多粒度划分,实现对系统权限的有效管理。对相关概念和操作进行了形式化定义,在此基础上描述了权限互斥和角色互斥关系。给出了重要过程的流程图和主要表之间的关系。  相似文献
3.
一种基于多粒度语言偏好矩阵的多属性群决策方法   总被引:5,自引:0,他引:5  
针对决策专家以多粒度语言偏好矩阵形式给出偏好信息的多属性群决策问题,提出一种基于二元语义一致化的多属性群决策方法.首先,构建一个基本语言偏好集作为多粒度语言一致化的参考集合;然后,采用基于二元语义的一致化处理方法将不同粒度的语言偏好信息均统一转化为相同粒度的二元语义形式,再通过二元语义的相关集结算子,对各决策专家给出的偏好信息进行集结并进行方案优选,得到满意结果;最后,通过算例说明了该方法的有效性.  相似文献
4.
This paper proposes a method to solve the group decision making (GDM) problems with multi-granularity linguistic assessment information. In the method, the multi-granularity linguistic information provided by experts is firstly expressed in the form of fuzzy numbers. In order to make the collective opinion close to each expert’s opinion, a linear goal programming model is constructed to integrate the fuzzy assessment information and to directly compute the collective ranking values of alternatives without the need of information transformation. Then, a fuzzy preference relation on the pairwise comparisons of the collective ranking values of alternatives is constructed using the dominance possibility degree of the comparison between the fuzzy numbers. By applying a non-dominance choice degree to this fuzzy preference relation, the ranking of alternatives is determined and the most desirable alternative(s) is selected. An example is used to illustrate the applicability of the proposed method and its advantages.  相似文献
5.
模糊质量功能配置中多粒度多语义语言信息的处理   总被引:1,自引:0,他引:1  
模糊集理论能够对本质上定性、主观和不确定的信息进行定量化描述,因而被用于质 量功能配置中,从而形成了模糊质量功能配置.但在所讨论的模糊质量功能配置中,通常考 虑的是同一粒度和语义的语言术语,本文讨论了模糊质量功能配置中的多粒度多语义的情况 ,并对该情况下的定性信息定量化处理进行了研究.  相似文献
6.
Web资源的多粒度语义标注及其应用技术研究   总被引:1,自引:0,他引:1       下载免费PDF全文
当前的Web搜索引擎获得的搜索结果都是基于关键字标注的Web文档、页面或链接,不支持对文档内部信息的检索。为支持Wcb资源内部信息的检索,研究多粒度语义标注,即按树根结点、分支结点、叶子结点及资源信息元为粒度单位对Web资源进行组织管理,并在此基础上探讨基于本体的搜索技术。初步的分析和实验表明,这样可以提高从形式多样的海量Web资源中获取所需信息的效率。  相似文献
7.
Reaching a high level of consensus among experts is critical in group decision making problems. Usually, it is the moderator task to assure that the consensus process is carried out properly and, if possible, to offer recommendations to the expert in order to change their opinions and narrow their differences.In this paper we present an implemented web based consensus support system that is able to help, or even replace, the moderator in a consensus process where experts are allowed to provide their preferences using one of many types (fuzzy, linguistic and multi-granular linguistic) of incomplete preference relations.This system is based on both consistency and consensus measures and it has been designed to provide advice to the experts to increase group consensus level while maintaining the individual consistency of each expert. The consistency measures are characterized by and computed using uninorm operators. When appropriate, the system also helps experts to reduce the incompleteness of their preference relations. The web interface allows to carry out distributed consensus processes and thus, experts do not necessarily need to physically meet together.  相似文献
8.
基于视频感知哈希的视频篡改检测与多粒度定位   总被引:1,自引:0,他引:1  
为了对被篡改过的视频进行准确快速的篡改检测与定位,引入人类视觉可计算模型,提出一种多层次、多粒度的视频篡改快速检测与定位算法.采用随机分块采样技术,提取视频结构感知特征及视频图像时域感知特征,利用哈希理论的单向摘要特性量化感知特征,获取视频摘要哈希.通过应用相似度矩阵进行多粒度、多层次篡改部位检测与定位.实验结果表明,相似度拟合图能够体现视频篡改攻击强度和攻击部位,算法表现出更好的篡改检测准确率与定位精确度.  相似文献
9.
多粒度光网络中动态路由与波长分配算法   总被引:1,自引:0,他引:1  
通过分析多粒度光网络路由与波长分配的特点,针对WAPG算法的波长碎片问题,通过定义5种不同的逻辑链路权重,修改了WAPG算法的波长权重标注方法,达到减少波长碎片的目的。仿真结果表明,提出的修正算法有效地减少了多粒度光网络中的波长转换数,降低网络的阻塞概率,同时节省网络资源。  相似文献
10.
With the development of IP networks and intelligent optical switch networks, the backbone network tends to be a multi-granularity transport one. In a multi-granularity transport network (MTN), due to the rapid growth of various applications, the scale and complexity of network devices are significantly enhanced. Meanwhile, to deal with bursty IP traffic, the network devices need to provide continuous services along with excessive power consumption. It has attracted wide attention from both academic and industrial communities to build a power-efficient MTN. In this paper, we design an effective node structure for MTN. Considering the power savings on both IP and optical transport layers, we propose a mathematical model to achieve a cross-layer optimization objective for power-efficient MTN. Since this optimization problem is NP-hard (Hasan et al. (2010)  [11]) and heuristic or intelligent optimization algorithms have been successfully applied to solve such kinds of problems in many engineering domains (Huang et al. (2011)  [13], Li et al. (2011)  [17] and Dong et al. (2011)  [5]), a G  reen integrated RRouting and Grooming algorithm based on Biogeography-Based Optimization (Simon (2008)  [23]) (GRG_BBO) is also presented. The simulation results demonstrate that, compared with the other BBO based and state-of-the-art power saving approaches, GRG_BBO improves the power savings at a rate between 2%–15% whilst the high-level multi-user QoS (Quality of Services) satisfaction degree (MQSD) is guaranteed. GRG_BBO is therefore an effective technique to build a power-efficient MTN.  相似文献
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