Security of Ad Hoc Network

An Ad hoc network is composed of wireless mobile nodes.Because there is no other wired infrastructure such as base stations,the ad hoc network,unlike other wireless networks such as Wireless Local Area Network(WLAN),has to face attacks from both the control plane and the data plane.Ad hoc should ensure the routing security on the control plane,and the secure forwarding of packets on the data plane.The distributed network protocol should operate safely,and peer-to-peer nodes should have trusting relations for each other.For this purpose,a complete security solution should include three parts:security on the control plane,security on the data plane,and security of key management.

Working Together To Meet Public Health Security Challenges And Build The Health Silk Road Silk Road Think Tank Association Thematic Cloud Forum

A Silk Road Think Tank Association Thematic Cloud Forum hosted by Silk Road Think Tank Association and co-organized by China Center for Contemporary World Studies(CCCWS)of International Department,CPC Central Committee and Chongyang Institute of Financial Studies,Renmin University of China was held in Beijing on April 24,2020.

Chinese Citizens' Right To Work and Social Security Effectively Protected——An interview with Zheng Silin, minister of labor and social security

Following is an interview by staff reporters of the Human Rights magazine with Zheng Silin, Chinese minister of labor and social security. The interview was meant in part to celebrate the tenth anniversary of the implementation of the Labor Law of the People's Republic of China that falls on January 1,2005. We are publishing this transcript with a view to providing our readers with information about how China has worked persistently to protect citizens' right to work and social security and the achievements it has made in this regard. We need to remind our readers of the fact that back in March 2004, the National People's Congress, China's highest legislature, approved a recommendation for revision of China's Constitution. In accordance with the recommendation, the Constitution had one more clause added: The state shall establish and improve a social security system commensurate to the level of the economic and social development.

Security Framew ork of Mobile Internet

The article describes the layered model of physical network and information security, and the establishment of the mobile Internet’s security framework based on its network architecture. The mobile Internet has three parts, i.e. terminal, network and service system, each of which can be studied in four layers of the network and information security, namely, the equipment/environment security layer, the service and application security layer, the information security layer and the information content security layer.

Security for Industrial Communication Systems

B. Network Architectures This section describes the main types of industrial and utility communication network topologies and protocols, in preparation for the discussion of specific security issues in the later sections. Communication networks for industrial automation are typically built in hierarchi-

Lon Works技术在智能小区安防系统中的应用

介绍了一种基于Lon Works技术的智能小区安防系统的主要功能、硬件组成及软件编程,实践证明,该系统具有适应性强、组态灵活、报警准确的特点。

基于LonWorks的安防监控系统的设计

本文介绍了基于LonWorks技术的安防监控系统在校园安防系统中的应用,给出了安防系统中的核心模块智能控制器的硬件及软件实现原理、与上位机的通信协议,及上位机通信软件的实现方法。本设计对于安防监控系统在校园中的广泛推广有重要的指导意义。

基于Solid Works的模型权限管理系统研究

通过Solid Works的二次开发接口,以VS2005为开发工具,把权限管理策略和加解密技术集成到Solid Works中,实现产品三维模型数据全生命周期的安全保护控制。对身份验证技术、DES加密算法的实现过程进行阐述;介绍Solid Works消息拦截流程;提出限制Solid Works功能的思路与方法。

基于Klocwork的C/C++软件静态检查

为了保证基于Linux与Vx Works操作系统的C/C++软件代码的质量,需要对软件源代码进行Klocwork检查。分别以SVN与Clear Case作为配置管理工具,将Klocwork工具分别在不同的操作系统下完成安装与配置之后,对C/C++源代码进行Klocwork检查。介绍了Linux环境下配置管理工具SVN客户端安装、SVN版本库的代码更新、Klocwork工具的安装与配置、Clear Case版本库的代码更新、以及Klocwork分别在Linux与Vx Works操作系统下进行Klocwork检查的步骤。给出了Klocwork检查分别在Linux与Vx Works操作系统中的详细检查步骤与检查脚本,以及对已经被检查出来的缺陷的处理。典型案例表明,Klocwork检查有助于及时发现并解决C/C++软件源代码的各种缺陷,从而提高软件质量和安全性。

基于Lon Works总线的智能小区安防系统设计

本文介绍了智能小区安防系统的结构,对各子系统功能做了简要说明,分析了Lon Works技术在智能小区中应用的优势,对基于该技术的小区安防系统的智能节点软硬件进行研究,综合利用计算机、网络通信、自动控制等技术为小区提供更加可靠的安全防范系统。

Topology control of tactical wireless sensor networks using energy efficient zone routing

The US Department of Defense （DoD） routinely uses wireless sensor networks （WSNs） for military tactical communications. Sensor node die-out has a significant impact on the topology of a tactical WSN. This is problematic for military applications where situational data is critical to tactical decision making. To increase the amount of time all sensor nodes remain active within the network and to control the network topology tactically, energy efficient routing mechanisms must be employed. In this paper, we aim to provide realistic insights on the practical advantages and disadvantages of using established routing techniques for tactical WSNs. We investigate the following established routing algorithms： direct routing, minimum transmission energy （MTE）, Low Energy Adaptive Cluster Head routing （LEACH）, and zone clustering. Based on the node die out statistics observed with these algorithms and the topological impact the node die outs have on the network, we develop a novel, energy efficient zone clustering algorithm called EZone. Via extensive simulations using MATLAB, we analyze the effectiveness of these algorithms on network performance for single and multiple gateway scenarios and show that the EZone algorithm tactically controls the topology of the network, thereby maintaining significant service area coverage when compared to the other routing algorithms.

IUKF neural network modeling for FOG temperature drift

A novel neural network based on iterated unscented Kalman filter （IUKF） algorithm is established to model and com- pensate for the fiber optic gyro （FOG） bias drift caused by temperature. In the network, FOG temperature and its gradient are set as input and the FOG bias drift is set as the expected output. A 2-5-1 network trained with IUKF algorithm is established. The IUKF algorithm is developed on the basis of the unscented Kalman filter （UKF）. The weight and bias vectors of the hidden layer are set as the state of the UKF and its process and measurement equations are deduced according to the network architecture. To solve the unavoidable estimation deviation of the mean and covariance of the states in the UKF algorithm, iterative computation is introduced into the UKF after the measurement update. While the measure- ment noise R is extended into the state vectors before iteration in order to meet the statistic orthogonality of estimate and mea- surement noise. The IUKF algorithm can provide the optimized estimation for the neural network because of its state expansion and iteration. Temperature rise （-20-20℃） and drop （70-20℃） tests for FOG are carried out in an attemperator. The temperature drift model is built with neural network, and it is trained respectively with BP, UKF and IUKF algorithms. The results prove that the proposed model has higher precision compared with the back- propagation （BP） and UKF network models.

Optimization of Laser Ablation Technology for PDPhSM Matrix Nanocomposite Thin Film by Artificial Neural Networks-particle Swarm Algorithm

A new thermal ring-opening polymerization technique for 1, 1, 3, 3-tetra-ph enyl-1, 3-disilacyclobutane （TPDC） based on the use of metal nanoparticles produced by pulsed laser ablation was investigated. This method facilitates the synthesis of polydiphenysilylenemethyle （PDPhSM） thin film, which is difficult to make by conventional methods because of its insolubility and high melting point. TPDC was first evaporated on silicon substrates and then exposed to metal nanoparticles deposition by pulsed laser ablation prior to heat treatment.The TPDC films with metal nanoparticles were heated in an electric furnace in air atmosphere to induce ring-opening polymerization of TPDC. The film thicknesses before and after polymerization were measured by a stylus profilometer. Since the polymerization process competes with re-evaporation of TPDC during the heating, the thickness ratio of the polymer to the monomer was defined as the polymerization efficiency, which depends greatly on the technology conditions. Therefore, a well trained radial base function neural network model was constructed to approach the complex nonlinear relationship. Moreover, a particle swarm algorithm was firstly introduced to search for an optimum technology directly from RBF neural network model. This ensures that the fabrication of thin film with appropriate properties using pulsed laser ablation requires no in-depth understanding of the entire behavior of the technology conditions.

基于SolidWorks的实木电火箱取暖器设计

在我国高寒山区以及长江湿冷地区的人们,冬天有使用实木电火箱取暖器取暖的习惯。传统的实木电火箱取暖器存在温度可控性差、易引发火灾、耗能高、体积庞大的缺点。为解决上述问题,文中利用Solid Works设计了一款温度可控、功率可调且可拼装组合的新型实木电火箱取暖器。该取暖器利用温度传感器和恒温控制电路对温度进行监控调节,以达到安全节能的目的。利用机械结构实现取暖器的拼装组合以满足不同用户的需求。

Network selection based on available lin bandwidth in multi-access networks

One of the important aspects of seamless communication for ubiquitous computing is the dynamic selection of the best access network for a multimodal device in a heterogeneous wireless environment. In this paper, we consider available bandwidth as a dynamic parameter to select the network in heterogeneous environments. A bootstrap approximation based technique is firstly utilized to estimate the available bandwidth and compare it with hidden Markov model based estimation to check its accuracy. It is then used for the selection of the best suitable network in the heterogeneous environment consisting of 2G and 3G standards based wireless networks. The proposed algorithm is implemented in temporal and spatial domains to check its robustness. The numerical results show that the proposed algorithm gives improved performance in terms of estimation error （less than 15%）, overhead （varies from 0.45% to 72.91%） and reliability （approx. 99%）as compared to the existing algorithm.

数智技术赋能统战工作发展透视

数智技术与统战工作在价值理念和政治定位等层面具有高度契合性,前者可以满足后者信息化、智能化、精准化、动态化等发展需求,为后者高质量发展提供持续动能。数智技术能有效支撑和服务于统战工作、开拓统战工作数据应用新空间、激发统战工作新活力。当前我国数智统战工作取得了一些进展,但也面临数字化平台和工具应用不足、数据共享和协同体系不完善以及数智化人才短缺和统战干部理念更新不足等问题。因此,未来数智统战应综合运用数智技术,通过构建面向统战对象的大数据智能分析平台、开发数智化统战工作工具、丰富宣传内容和形式,推动统战工作凝聚人心、汇聚力量;通过制定统一的数智统战顶层设计和规划、构建统一开放的统战云平台、完善数智安全保障体系,赋能大统战工作格局的构建;通过推进协商数智化体系构建、建立政协系统数智人才培训与考核机制、加大新技术在协商业务流程中的应用,深化协商民主。

新质公安战斗力的生成逻辑、科学内涵与实践路径

新质公安战斗力的概念是顺应新质生产力的概念而提出的。新质生产力发展带来社会新发展格局,也同时带来社会治安新常态,公安机关为适应这一社会治安新常态需要努力构建新安全格局,并从加快形成和提升新质公安战斗力方面着手进行实践。加快形成和提升新质公安战斗力需要从关注其生成逻辑作为起点,从马克思主义生产力理论来把握其理论逻辑,从公安工作的历史发展经验来分析其历史逻辑,从支撑与服务中国式现代化的必然要求来认识其现实逻辑。新质公安战斗力的科学内涵需系统辩证地认识到“新”是工作起点,“质”是目标追求,“以新促质”是核心要义,而“战斗力”则是关键落脚点。新质公安战斗力的实践路径需要从思想政治、社会治理、队伍建设、创新发展等重要能力维度出发,为奋力推进公安工作现代化提供动力,从而支撑与服务中国式现代化。

新质公安战斗力的现实背景、理论解构与质态提升

新质公安战斗力是中国特色公安学学术话语体系的新范畴,它的提出是在推进中国式现代化过程中,立足国际国内两个大局,统筹实现高质量发展和高水平安全良性互动,将公安队伍建设置于党和国家发展大局中思考谋划而提出的重要概念,意味着公安核心战斗力质的变化和跃迁,具有动态发展的性质。新质公安战斗力科学客观地体现了公安工作现代化面对的政治方向之新、形势任务之新、构建理念之新、内涵要义之新、核心要素以及使命愿景之新。加快形成和提升新质公安战斗力,要高站位强化政治建设,宽视野运用系统观念,大力度推进改革创新,深层次提升科技赋能,全方位抓好人才队伍。