均匀分布的优良特性及其应用

研究了均匀分布的优良特性,用均匀随机数生成其它随机数,在取先验分布为共轭分布的条件下,用贝叶斯统计方法给出均匀分布参数的最短可信区间。     

积极引导新社会阶层有序参政议政的思考

改革开放30年来中国社会结构发生的最大变化是新社会阶层的形成。随着社会主义市场经济体制的初步建立,新社会阶层的队伍不断壮大,使中国经济、社会的影响力也越来越大,并在政治舞台上渐渐有了一席之地。人们参政愿望的强烈、自身素质的提高以及参政过程中存在的不同程度的问题,为新社会阶层有序参政提供了可能性和必要性,而执政党的积极引导则成为新社会阶层有序参政议政的领路航标。     

Relay selection with feedback beamforming information through designed sector sweep report frame for mmWave WPANs

This paper proposes a novel relay selection strategy based on the feedback beamforming （BF） information through designed sector sweep （SSW） report frame for millimeter-wave （mmWave） wireless personal networks （WPANs）. First, an SSW report frame compatible with IEEE 802.11ad standard is designed. Second, an approach collecting instantaneous channel state information （CSI） overheard during BF is devised. Third, with the aim of minimizing the outage probability and maximizing the overall network throughput capacity, the optimal relay selection issue for non-line-of-sight （NLoS） links is formulated as a bipartite graph, and Kuhn Munkres （KM） algorithm is provided to resolve it. Both theoretical analysis and simulation results show, with CSI considering NLoS conditions and selected relays according to the overall network throughput capacity maximization principle, the improvements achieved over opportunistic relay selection strategy in terms of overall network throughput capacity and outage probability with minimal modifications to IEEE 802.1lad.     

基于因子分析的钢铁板块上市公司综合评价

运用多元统计法中的因子分析法,对2011年我国30家比较典型的钢铁板块上市公司,进行综合财务状况的研究分析。首先选取能反映钢铁上市公司经营状况的12项财务指标数据,对其进行标准化,再通过因子分析法提取5个公共因子计算出各个上市公司的因子得分,根据因子得分排序,对结果进行综合评价,给公司管理层提出建议,给投资者提出最佳的投资决策。     

基于线性学习模型的社会媒体流排名算法

在社会媒体中,对用户推荐适合的状态更新不仅降低了用户搜索信息的时间,也可以增加用户对服务的粘性。针对社会媒体中状态更新而推荐的准确性低的不足,提出了一种基于线性学习模型的状态更新排名算法。首先,根据社会媒体的性质定义了相应的偏好属性,并提出了一种基于线性模型的潜在偏好模型;其次,根据状态更新以及接收者的特征定义了相应的线性特征模型;最后,将潜在偏好模型和特征模型相结合,提出了一种引入时间效应的线性模型。通过实验验证表明,提出的算法与其它相关算法相比,算法的预测准确性更高,执行效率更快。     

Interacting Socially with the Internet of Things (IoT): Effects of Source Attribution and Specialization in Human–IoT Interaction

This study investigates the theoretical mechanisms by which the variations in source attribution (multiple sources vs. single source) and specialization (multifunctionality vs. single functionality) of Internet of Things (IoT) devices influence the quality of human–IoT interaction. Results from a between‐subjects experiment (N = 100) indicate that IoT devices that elicit the sense of multiple agencies and are specialized in a single function induce greater social presence and perceived expertise, which, in turn, lead individuals to show a more positive attitude toward the devices and to ascribe greater quality to the information transmitted by them. The results also reveal that the effect of multiple source attribution is more pronounced for individuals for whom the content of the information has low personal relevance.     

Being a Serial Transnational Activist

Transnational activism endures as a political practice turning a mirror onto the world's powerbrokers. We analyse a variety of transnational activism best characterized as serial by virtue of an observed systematic time and border‐spanning commitment to protest communication. Following statistical disambiguation of a dataset of 2.5 million unique Twitter users, we identified a subset of exceptionally prolific communicators and interviewed 21 of them. We show that a noted prominence in networked communication of otherwise unremarkable Twitter users may be an upshot of purposive strategies intended to publicize, support or help orchestrate collective action. Accordingly, we propose the term “engagement compass” to address the relationship between activists' life‐patterns and their personal investment in protest over time.     

Urban Social Media Demographics: An Exploration of Twitter Use in Major American Cities

This article explores intersections between place, race/ethnicity, and gender amongst American Twitter users and makes an argument that studying the intensity of tweets provides insights into how and why particular groups tweet. Given recent events in American political life such as the shooting in Ferguson, Missouri and the reactions by young, urban African Americans on Twitter, understanding the role of race, place, gender, and age is important. We observed the time between tweets of urban American Twitter users and explored whether the medium may be providing traditionally marginalized groups, such as young Black men, with potential avenues for mobilizing communication and access to resources.     

Who creates Trends in Online Social Media: The Crowd or Opinion Leaders?

Internet slang words can very quickly become ubiquitous because of social memes and viral online content. Weibo, a Twitter‐like service in China, demonstrates that the adoption of popular Internet slang undergoes 2 distinct peaks in its temporal evolution, in which the former is relatively much lower than the latter. An in‐depth comparison of the diffusion of these different peaks suggests that popular attention in the early stage of propagation results in large‐scale coverage, while the participation of opinion leaders at the early stage only leads to minor popularity. Our empirical results question the conventional influentials hypothesis and provide some insights for marketing practice and influence maximization in social networks.     

Media Niche of Electronic Communication Channels in Friendship: A Meta‐Analysis

The current landscape of communication technologies is characterized by a wide variety of choices. As each medium provides different affordances, each may occupy a different niche and be used in different relationships. Drawing on the theory of the niche, we did a meta‐analysis involving 27 effect sizes from 22 independent samples to test the correlation between media selection/use and friendship closeness. Results showed that the 5 communication channels filled 2 different friendship closeness niches. Mobile phone calls and texting had stronger positive correlations with friendship closeness than instant messaging, social network sites, and online gaming. Culture, but not gender, moderated some of these correlations: Friendship closeness had a stronger positive association with SNS use and online gaming in collectivist cultures.