远程联网控制技术在防务特种空调设备上的应用

目前,联网控制技术飞速发展。针对防务特种空调设备的高可靠性和保密性的特点,比较几种远程控制技术的特性,并以军需物资库房空调控制系统为例,提出基于CAN总线的远程联网控制技术在防务特种空调设备上的应用,将多座军需仓库的空调设备连接起来形成局域网,中心控制室可对网络内的各台空调设备进行遥控遥测。此项目的研究和推广可以大大节省人力、物力和财力,显著提高我军后勤自动化管理水平。     

能源计量联网管理系统与远传水表在企业中的应用

本文介绍了能源计量联网管理系统(ENMS)的构成,远传水表的选用与安装及ENMS与远传水表在工厂的应用实践效果。     

独立式火灾探测报警器联网系统可靠性要点分析

独立式火灾探测报警器联网系统,可在其保护区域内获取火灾信息,并及时为面临火灾威胁的人员疏散提供保障,为物业及消防救援机构对该类消防安全产品的使用提供有效的监管手段,为消防救援人员在第一时间确定火灾发生部位及灾后火因鉴定提供相关信息支持。随着物联网的发展,近年来此类系统应用较多,但在使用中也存在许多问题,影响了系统的可靠性。本文介绍了保证独立式火灾探测报警器联网系统稳定可靠的关键技术要求与系统平台的相关要求,为独立式火灾探测报警器联网系统的推广、应用提供指导。     

McTorrent: Using multiple communication channels for efficient bulk data dissemination in wireless sensor networks

This paper presents McTorrent, a reliable bulk data dissemination protocol for sensor networks. The protocol is designed to take advantage of multiple radio channels to reduce packet collisions and improve the latency of large object dissemination. We evaluated the performance of McTorrent via detailed simulations and experiments based upon an implementation on the TinyOS platform. Our results show that in comparison to Deluge, the de facto network reprogramming protocol for TinyOS, McTorrent significantly reduces the number of packet transmissions and the amount of time required to propagate a large data object through a sensor network.     

现代办公空间的社交场所——双流交投空港大厦项目设计有感

本项目设计打破了传统写字楼的单纯关注使用空间与立面效果的手法。更多的关注点是打造一个更舒适、绿色、丰富多变、有情趣的社交空间,提供一个改变其工作方式的机会,一个释放工作压力的途径和可能,一个无缝交流的空间、展示自我的平台。     

Understanding social networking sites adoption in China: A comparison of pre-adoption and post-adoption

Prior experience is an important determinant factor of individual behavior. This paper developed a theoretical model to predict the adoption intention of pre-adopters and post-adopters on social networking sites based on the theory of planned behavior. Using data from online surveys of netizens in China, the proposed model was tested in the context of pre-adoption and post-adoption by using the Partial Least Squares (PLS) technique. Then, multi-groups analysis was explored to compare the difference between the two groups. The results show that attitude, subjective norm and perceived behavior control have significant effect on the adoption intention of pre-adopters and post-adopters, and there is no significant difference between the two groups. In addition, information, meeting new people, and conformity motivations have the same significant effect on both groups. However, entertainment motivation has a significant effect on pre-adopters but connecting with old friends has none; in contrast, connecting with old friends has significant effect on post-adopters while entertainment motivation has no significant effect.     

Cooperative strategies of wireless access technologies: A game-theoretic analysis

The wireless Internet has to overcome the problem of spectrum scarcity as the number of mobile equipments could increase even by an order of magnitude in the next decade; the cooperation of mobile devices is foreseeable as a feasible solution to the problems. There exists a large body of literature on opportunistic ad hoc networking including Pelusi et al. (2006) [25], Chen et al. (2006) [26], Hui et al. (2005) [27]; however, the impact of the location of the devices on their access method selection is not yet appropriately dealt with. In this paper, we address this issue based on game-theoretic analyses. The key contribution of our work is threefold. First, we model the access method selection of mobile devices by extending the classical forwarding game with position, mobility, and availability of the devices. Second, we apply the model in game-theoretic analyses to better understand the optimal cooperation strategies in the presence of heterogeneous wireless technologies. We further extend our framework to include uncertainty. Finally, we present the applicability of the model in a cognitive radio scenario where complex structures of parameters are included.     

物联传感网噪声过滤的自适应线性权值算法

针对物联传感网络由于数据类型不一致造成散粒噪声.提出一种物联传感网络散粒噪声过滤的自适应线性权值算法.提取物联传感网络散粒噪声特征参数,对上述参数进行线性变换,获取噪声关联特征参数自适应线性权值,完成物联传感网络散粒噪声过滤.实验表明,该算法能够有效过滤物联传感网络中的散粒噪声,取得了令人满意的结果.     

用于准二维移动容迟容断网络的实时资源分配策略

资源分配是移动容迟容断网络的核心问题之一,影响着容迟容断网络路由甚至整个系统的效率.然而目前移动容迟容断网络的资源分配策略大多基于神经网络和遗传算法的混合算法,计算量大,不利于实时应用.为此根据移动网络可预测环境,提出了接入路由器消息矩阵及准二维接入带宽的约束条件,在此基础上建立了基于效用函数的资源分配策略,以满足实时要求.算法具有O(n)的算法复杂度,仿真结果显示切换掉话率和新呼叫阻塞率仅比最优化算法升高约1/4,计算用时则只有其36.99％.说明其在保证实时性的前提下仍能提供较好的QoS.算法可以进一步推广到二维移动场景中.     

大学生使用微信“摇一摇”现状及意义分析

分析了大学生使用微信“摇一摇”的现状，阐述了微信“摇一摇”对大学生的有利影响和不利影响，针对如何引导大学生正确合理使用微信“摇一摇”提出了相定的应对策略。