具有边权特性的社会网络重要成员识别

根据成员间关系的强弱给社会网络中各边赋予权重,将二元网络扩展到边权网络,提出一种新的度量指标。该指标通过累加一个成员在网络中成为关键点的次数来度量其删除后给整个网络带来的损害程度,从而判断该成员对维护网络运行绩效的重要性。通过组织沟通网络的实例分析,说明新指标可以从维护网络安全的视角,有效辨识那些虽然结构位置不显著,但对网络安全具有重大隐患的重要成员。     

SPECIAL ISSUE： REGIONAL CONVERGENCE AND COORDINATED URBAN GROWTH Externalities, Transport Networks and the Economic Growth of Urban Clusters

利用网络分析工具和新经济地理理论对新古典区域经济增长模型进行修正，通过对交易费用的细分构建外部性和运输网络下的城市群经济增长模型，并利用1990-2008年中国部分城市数据和向量自回归模型（VAR）进行实证检验，得出以下结论。在运输网络影响下，中心城市依靠要素集聚获得增长，非中心城市快速接近中心城市。运输网络的改善，将加速中心城市的要素集聚。同时，在保留部分新增要素的情况下，增加节点集聚系数、降低非中心城市问的运输成本，利于非中心城市对外部性的应用，加速其经济增长，促进与中心城市的协同增长。因此，在建设交通运输基础设施时，不仅要重视非中心城市与中心城市的互联互通，更要重视非中心城市间的相互联结。     

试论网络文学的美学原则

与传统文学相区别,网络文学有着独特的美学原则,具体表现为自由本色、开放精神、民间视野、多元取向、变革魅力、审美升华等。正是在这些原则下,网络文学显示出勃勃生机,成为一种无法忽视的文学景象。     

Impact of methods for reducing respondent burden on personal network structural measures

We examine methods for reducing respondent burden in evaluating alter–alter ties on a set of network structural measures. The data consist of two sets, each containing 45 alters from respondent free lists: the first contains 447 personal networks, and the second 554. Respondents evaluated the communication between 990 alter pairs. The methods were (1) dropping alters from the end of the free-list, (2) randomly dropping alters, (3) randomly dropping links, and (4) predicting ties based on transitivity. For some measures network structure is captured with samples of less than 20 alters; other measures are less consistent. Researchers should be aware of the need to sample a minimum number of alters to capture structural variation.     

一种用于Ad hoc网络的优化拥塞控制算法

从分析Adhoc网络的信息流竞争特点出发,引入了链路干扰集的概念,构建了一个基于链路干扰集的价格框架。在此框架中,某链路的拥塞信息被表示为此链路干扰集的总价格。并提出了相应的分布式平行算法-价格协同法PCA来求解在小时间段内网络状态不变的拥塞控制问题。同时,分析了PCA对网络状态变化的自适应性能。仿真结果表明,PCA能快速收敛到全局优化解,对网络状态的变化有较好的自适应能力,所获得的网络性能比TCP-Reno要优越得多。     

Bringing the owners back in: An analysis of a 3-mode interlock network

This paper examines the association between ownership and director interlocks in Swedish big business during the period 1990–2005. By analyses of the 3-mode network of owners, firms, and directors, multiple director assignments are shown to be highly dependent on owner interlocks. The findings provide a new understanding of the mechanisms behind the formation of director interlocks. Furthermore, the association between the interlock types suggests that the ownership network may potentially (co-)produce some of the phenomena that have been attributed to the director network. Future analyses of director interlocks have to bring the owners back in.     

Predicting Teen Motherhood and Teen Fatherhood: Individual Characteristics and Peer Affiliations

In a longitudinal investigation of the antecedents and pathways of teen parenthood, 475 participants (248 females and 227 males) were followed from Grade 7 through early adulthood. In the first year of the investigation, homogeneous subgroups were identified by clustering participants on five characteristics (i.e., aggression, popularity, academic competence, age, and socioeconomic status). At the same time, peer social networks were identified by the Social Cognitive Map procedure. For each participant, the configuration of peer characteristics was also identified. A high correspondence was found between the individual characteristics and the characteristics of closely affiliated peers. Both teen fatherhood and teen motherhood were predicted by individual configurations and peer configurations (e.g., a combination of high aggression, low academic competence, low popularity, and low family SES). Peer characteristics, race, and family socioeconomic status assumed unique roles in predicting teen motherhood. Growth curve analyses showed that teen-mothers differed from non-mothers in their starting points and developmental trajectories. This study demonstrated that a simultaneous examination of both the individual and his/her peer context yielded important information on teen parenthood.     

主动网络的安全技术探讨

介绍了主动网和网络安全的概念，引入了安全主动网环境的模型，对主动网的安全问题进行了分析和讨论。通过对主动网安全环境的阐述，以及对目前主动网安全方面的研究情况的介绍，论证了安全性在主动网系统中的重要性。说明了对主动网安全性问题的研究及解决，是主动网技术进入大规模实用化的一个先决条件。     

基于线性矩阵不等式的牵制控制策略分析

研究复杂动力学网络的同步牵制控制问题.通过引入牵制控制,对具有大规模节点网络中的小部分节点实施线性反馈控制策略,使得整个网络的所有节点均达到同步.针对一类一致连结的耦合复杂网络模型,采用线性矩阵不等式的方法给出了实施牵制控制达到同步的充分条件.该条件表明,选择牵制异质网络中度较大的节点可能更容易使得网络实现同步.特别地,对于特定的内部耦合矩阵和足够大的耦合强度,只要对网络中任一节点实施牵制控制就可以保证整个网络同步的实现.数值仿真验证了上述结论的有效性.