泛在网络架构的研究

结合国际主要标准组织——ITU-T的最新标准化情况,韩国、日本的一些产业化情况以及欧盟的一些研究项目,介绍了泛在网络的一些发展趋势和情况,提出了泛在网络的架构和其可能包含的内容。     

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.     

基于CPN的情报组网系统作战过程建模仿真研究

为更好地研究情报组网系统作战过程这一离散型事件,运用CPN语言和DoDAF框架标准,建立了情报组网系统作战过程的CPN-Tools模型,并假定来袭目标和情报组网系统结构进行了仿真.仿真得出的情报组网系统的探测时间和融合发现概率与实际情况相符,表明运用CPN语言分析情报组网系统的可行性.     

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。     

The influence of depression and personality on social networking

Established literature supports the notion that depressed individuals tend to be socially maladjusted and behave differently from those who aren't depressed. Yet, previous studies seem to overlook the influence of personality on behavior. Particularly, neuroticism may moderate the effect of depression on the way people behave. As one of the Big-Five factors of personality, neuroticism refers to a trait of one's capability to control emotional distress. Based on behavioral data from 393 Facebook users, current research demonstrates the interaction between depression and personality. Users engaged in activities at different levels of activities corresponding to their depression levels. Further, the effect of depression on social networking was regulated by personality: once neuroticism exceeded certain points, an increase in depression led to a decrease in social networking activities.     

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.     

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.     

程控交换机与生产调度机组网改造设计

介绍了程控交换机与生产调度机组网改造设计的方案,从物理组网与中继管理数据配置两个方面论述了改造方案实施的方式,指出采用数字中继组网后,提高了系统的安全可靠性,达到了预期的改造目标。     

对现阶段工程监理实践中存在问题的探索和几点建议

我国引进监理行业迄今的二十多年来,在不同行业的工程施工监理工作都卓有成效,监督管理程序都已逐渐发展成熟,监理行业已经是确保工程建设顺利实施不可或缺的一方。但近几年监理行业发展明显停滞,这逐渐暴露出行业行为规范存在的明显不足,并已经严重制约监理行业的正常发展,必须尽快彻底找出解决方法,这已是刻不容缓。