基于QoS的Web服务可信性研究

发布时间：2018-03-26 01:43

本文选题：Web服务　切入点：QoS　出处：《浙江理工大学》2014年硕士论文

【摘要】：在20世纪70年代，自从可信性的理念在互联网研究范围内被Marsh提出以来，一直得到许多学术界和工商业人士的关注。随着使用Web服务的用户逐渐增加，越来越多的人开始提供Web服务，其中也不缺乏有很多投机取巧之人，这使得Web服务的质量参差不齐，如何使得Web服务更可信已经成了大家所关注的要点。当今社会Web服务越来越受到大家的关注，Web服务的QoS研究也越来越被研究者所关注。可信度是用户的主观的感受，所以用户对可信度的影响是不可以忽视的。本文主要是考虑基于服务的QoS来对服务的可信度问题，研究的对象具有模糊程度高，影响因素大的特点，因此用模糊综合评价算法来实现是非常合适的，但是又有一些不足之处，比如对恶意评价的抵抗力低等特点。同时传统的Web可信服务模型对于实际情况相比也有很多缺陷，传统的Web可信服务模型的QoS信息都是有服务提供者所提供的，其可信性不能保证。针对以上问题，本人在前人研究的基础之上，进行了以下几方面的工作：（1）针对目前模糊综合评价方法在对恶意评价方面的不足之处，本文经过一定的研究，在标准的模糊综合评价方法上进行改进，对数据进行一定的处理和筛选，使该算法对恶意评价等故意破坏行为有一定的抵抗能力。（2）在研究相似用户匹配的算法之中，针对数据量过大的情况，本文提出了对数据按照种类进行分类的方法，使得用户相似度计算得到的结果更加准确，同时在一定程度上减少了算法的执行实际。（3）为了使得Web服务的QoS信息更加具有可信度，本文在传统的Web可信服务模型上增加了QoS更新，数据处理和可信模块，具体内容在第四章内进行了描述。同时考虑了用户评价的因素，使得Web服务的QoS值不仅仅取决于服务提供者提供的信息，更重要的是根据用户进行调整，使得其值与传统方法相比更加具有可信性。最后本文结合改进的算法以及模型，对电子商务网站服务的可信性进行了评价，，给出了最终结果。
[Abstract]:In the 1970s, since the idea of credibility was put forward by Marsh in the context of Internet research, it has been the focus of many academics and business people. More and more people begin to provide Web services, and there is no shortage of speculators, which makes the quality of Web services uneven. How to make Web services more credible has become the focus of attention. Nowadays, more and more attention has been paid to the QoS research of Web services. The credibility of web services is the subjective feeling of users. Therefore, the impact of users on the reliability can not be ignored. This paper mainly considers the reliability of service based on QoS, the research object has the characteristics of high degree of ambiguity and great influence factors. So it is very suitable to use fuzzy comprehensive evaluation algorithm, but there are some shortcomings, such as low resistance to malicious evaluation, etc. At the same time, the traditional Web trusted service model has a lot of defects compared with the actual situation. The QoS information of traditional Web trusted service model is provided by service provider, and its credibility can not be guaranteed. In view of the above problems, on the basis of previous studies, I have carried out the following work:. 1) in view of the deficiency of the present fuzzy comprehensive evaluation method in the aspect of malicious evaluation, this paper, through certain research, improves on the standard fuzzy comprehensive evaluation method, and processes and screens the data to a certain extent. The algorithm has a certain resistance to malicious evaluation and other vandalism. 2) in the research of similar user matching algorithm, this paper proposes a method of classifying the data according to the kind of data, which makes the results of user similarity calculation more accurate. At the same time, the implementation of the algorithm is reduced to a certain extent. In order to make the QoS information of Web service more reliable, this paper adds QoS update, data processing and trusted module to the traditional Web trusted service model. The content is described in Chapter 4, and the factors of user evaluation are taken into account, which makes the QoS value of Web service not only depend on the information provided by the service provider, but also be adjusted according to the user. It makes the value more credible than the traditional method. Finally, this paper evaluates the credibility of e-commerce website service with the improved algorithm and model, and gives the final results.
【学位授予单位】：浙江理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.09

【参考文献】