ASYMPTOTIC EFFICIENCY OF THE BLEST‐TYPE TESTS FOR INDEPENDENCE

Blest (2000, Aust. N. Z. J. Stat. 42 , 101–111) proposed a new measure of rank correlation that is sensitive to discrepancies in the small ranks. This paper investigates the efficiency properties of non‐parametric tests for independence based on Blest's correlation coefficient and its modifications. Pitman efficiency comparisons are made with analogous tests existing in the literature. Conditions for Pitman optimality of the Blest‐type tests are established.     

Serial dependence and regression of Poisson INARMA models

Time series of counts occur in many fields of practice, with the Poisson distribution as a popular choice for the marginal process distribution. A great variety of serial dependence structures of stationary count processes can be modelled by the INARMA family. In this article, we propose a new approach to the INMA(q) family in general, including previously known results as special cases. In the particular case of Poisson marginals, we will derive new results concerning regression properties and the serial dependence structure of INAR(1) and INMA(q) models. Finally, we present explicit expressions for the distribution of jumps in such processes.     

网络依赖行为研究及其干预模型的理论构建

通过对西安交通大学3557名大学生网络依赖行为的研究,从情绪、情感因素、心理应激与心理压力、社会性分离等层面,分析大学生网络依赖行为及其心理成因,探讨网络依赖行为的理论解释及综合心理干预因素,并就网络依赖行为的心理干预模型构建,提出心理-社会-家庭-学校多维系统的干预模型理论.     

Bayesian System Reliability Prediction

In system reliability studies a common problem is the coherent assessment of system reliability, based on generic database information from components and on failure data from a system and its components in a common, but unknown, environment. A solution to this problem is given.     

浅谈“照相手机时代”摄影记者的生存之道

照相手机的发展使新闻图片采集过程平民化,新闻摄影空前的大众参与使新闻摄影领域的格局发生了根本性改变,这让专业摄影记者产生了极强烈的危机感.为此,专业摄影记者应积极面对激烈的竞争,提高理论文化素质,建立广泛通畅的信息网络,站牢日常报道的阵地,拼抢突发新闻的报道,多出精品,为受众提供更丰富、更优质的新闻照片.     

移动机器人系统多传感器信息融合研究

多传感器信息融合是目前移动机器人领域的主要研究热点。全面讨论了多传感器信息融合技术的主要研究进展及其在移动机器人系统中的典型应用情况；简要介绍了多传感器信息融合的基本实现方法；系统分析了移动机器人系统中多传感器信息融合的主要研究目标与研究内容；在此基础上，提出一种基于多传感器信息融合的足球机器人定位与导航系统的设计实现方案。     

The ‘digital glimpse’ as imagining home

This paper proposes the concept of the ‘digital glimpse’, which develops the existing framing of imaginative travel. Here it articulates the experiences of mobile workers digitally connecting into family life and everyday rituals when physically absent with work. The recent embedding of digital communication technologies into personal relationships and family life is reconfiguring how absence is experienced and practiced by workers on the move, and through this, new digital paradigms for life on-the-move are emerging. This paper explores how such social relationships are maintained at-a-distance through digital technology – using evidence from qualitative interviews with mobile workers and their families. Digital technology now enables expressive forms of ‘virtual travel’, including video calling, picture sharing, and instant messaging. This has implications for the ways in which families can manage the social and relational pressures of being apart. Experiences of imaginative travel created through novel media can enrich the experience and give a greater sense of connection for both those who are at home and those who are away. While technology is limited in its ability to replicate a sense of co-presence, ‘digital glimpses’ are an emergent set of sociotechnical practices that can reduce the negative impact of absence on family relationships.     

低轨卫星移动通信系统馈电链路切换方案

研究了无星际链路低轨卫星移动通信系统中的馈电链路的切换问题,提出了两种馈电切换方案-最短馈电链路切换方案和最长可视时间切换方案。结合两种已有的用户链路切换准则,在构造的非均匀分布全国话务密度模型上进行了系统仿真。仿真结果表明馈电链路切换方案对系统开销影响较大,选择最长可视时间馈电链路切换方案,可以减少切换带来的信令开销,提高服务质量,具有较高的参考和实用价值。     

截短RS/混合Ⅱ型ARQ在衰落信道上的性能分析

分析了截短ＲＳ／混合Ⅱ型ＡＲＱ在无线衰落信道上的分组错误率、通过效率、传输时延等特性，给出了数值仿真结果。研究发现，由于ＲＳ码具有很强的纠错能力，通过有限次的重传就可达到很低的分组错误率，同时减小了固重传而引起的传输时延。     

手机电视面临的机遇、挑战及对策

随着3G牌照发放日期的日益临近，手机电视也成为业界关注的焦点。在分析手机电视发展历程的基础上，探讨了手机电视面临的机遇和挑战，并进一步阐述了手机电视应采取的发展对策。