系统症结辨识的模糊分析与应用

本文基于模糊因果网络分析,提出了系统症结辨识的一种新思路,实例研究了吉林省轻工业发展现状的主要症结所在．     

Who Cares About Your Big Day? Impact of Life Events on Dynamics of Social Networks

With online social networking having revolutionized the way in which individuals communicate and interact with each other, there is heightened research interest in the dynamics of social networks. This article seeks to contribute to this stream of research by addressing the key question of the impact of major life events, such as getting married or graduating from college, on social network evolution. Consistent with prior studies on the evolution of individuals’ social networks, we specifically focus on two key attributes of an individual's network: indegree of ties and relational embeddedness. By longitudinally analyzing the network activities of a large‐scale online social network, we find that the indegree of ties increased significantly following a major life event, and that this impact was stronger for more active users in the network. Interestingly, we also find that the broadcast of major life events served to revive dormant ties as reflected by a decrease in embeddedness following a life event. We also found that one‐time life events such as weddings had a greater impact than recurring life events such as birthdays on the evolution of a user's social network. From a research perspective, our study contributes to existing research by focusing on a user's communication network as opposed to friendship network and by emphasizing how exogenous life events add a different dimension to user communication patterns. The importance of life events on social network evolution has important implications for practice as well by providing insights to advertisers as well as to social networking sites.     

Adaptive sampling without replacement of clusters

In a common form of adaptive cluster sampling, an initial sample of units is selected by random sampling without replacement and, whenever the observed value of the unit is sufficiently high, its neighboring units are added to the sample, with the process of adding neighbors repeated if any of the added units are also high valued. In this way, an initial selection of a high-valued unit results in the addition of the entire network of surrounding high-valued units and some low-valued “edge” units where sampling stops. Repeat selections can occur when more than one initially selected unit is in the same network or when an edge unit is shared by more than one added network. Adaptive sampling without replacement of networks avoids some of this repeat selection by sequentially selecting initial sample units only from the part of the population not already in any selected network. The design proposed in this paper carries this step further by selecting initial units only from the population, exclusive of any previously selected networks or edge units.     

增强高校网络思想教育实效性的思考

电脑互联网络风靡全球，网络对大学生成长提供有利条件的同时，也对他们的成长造成诸多不利影响，提高网络思想教育的实效性成为高校思想教育工作的重要课题。改进网络思想教育的方式、理念、机制，提高学校思想教育工作者开展网络思想教育能力，是当前增强网络思想教育时效性的重要着眼点。     

Mixing patterns between age groups in social networks

We present a method for estimating transmission matrices that describe the mixing and the probability of infection between age groups. Transmission matrices can be used to estimate age-dependent forces of infection in age-structured, compartmental models for the study of infectious diseases. We analyze the social network generated by the synthetic population of Portland and extract mixing patterns. Our results show that the mixing within the population consists of two groups, children and adults. Children interact most frequently with other children close to their own age, while adults interact with a wider range of age groups and the durations of typical adult contacts are shorter than typical contacts between children. Furthermore, the transmission matrix shows that children are more likely to acquire infection than adults.     

基于移动代理的网络入侵预警模型研究

通过向网络入侵预警模型引入移动代理技术,采用贝叶斯网推理模型实现规划识别的预警模型,预测下一步的入侵事件和可能入侵攻击,提高网络入侵预警监测的效率,同时,通过移动代理降低了网络通信量和系统负载量。     

基于网络环境下馆员服务观念要深化和拓展

从高校图书馆的信息优势和资源优势出发,对文献资源的开发利用和共享问题进行了探讨。     

《传播净化法案》:美国对色情网站的控制模式

以美国1996年颁布的《传播净化法案》(Communication Decency Act,简称CDA)为分析对象,评介其缘起、内容,以及所引起的违宪争议,可以了解美国政府通过法律途径限制网络色情所遭遇到的困境。但美国网络色情的控制模式对我国的网络传播净化仍具有一定的借鉴意义。这种模式可以总结为以技术手段为主导、网络素养教育为基础、政府立法为保障、积极寻求国际合作的“综合管理”模式。     

网络文学与传统文学

多媒体文学是网络文学发展的主流形态.本文探讨了网络文学创作的多媒体特性给创作活动带来无限生机和隐患,及它对传统文学的影响.     

关于网络发展的一些思考

随着网络时代的来临,网络对社会发展表现出不可估量的影响。在网络经济发展势头迅猛的情况下,对网络价值的研究具有重要的意义。网络时代的价值取向具有一些新的特点。网络也是一把双刃剑,对其发展需做出合理的价值判断。对网络发展进行规范和约束,使其按良好秩序运行具有重要意义。