Papers by Keyword: Deployment

Abstract: Smart Grid (SG) systems involves large Information Communication Technology (ICT) infrastructure integrated with the power grid system to allow bidirectional flows of information, for effectiveness and to provide economic and sustainable processes that facilitates constant electricity supplies. As a result of open IoT used in smart grid infrastructure, electricity generation and distribution information are getting more vulnerable to online threats. The need to find effective and mitigating measures to the vulnerability and threats in the systems. As broadband network moves from 4G to 5G networks with its attendant advantages, smart grid interoperability will require a well-structured security strategy to avert cyber-attacks and ensure grid security. Cyber-attack issues are critical factors that need to be understood and mitigating techniques developed to ensure the smooth running of smart grid systems. Research has shown that severe vulnerabilities in the implementation of the smart meter pose a threat to grid infrastructure, as such, it is only when these issues are resolved that we can have a sustainable and realistic smart grid technology. This study addressed these concerns by developing a conceptual model for the mitigation of security vulnerabilities in IoT-based smart grid electric energy distribution systems.

Abstract: An optimal design method for the qusai-static folding and deployment of opposite tape-spring flexure (OTSF) hinges is presented based on the response surface method. The full factorial method is employed to design of experiments, and the qusai-static folding and deployment nonlinear analysis is obtained by ABAQUS/Explicit slover. The surrogate models of the OTSF flexure hinge are derived by the response surface method. Considering lightweight and high stability, the peak moment of quasi-static folding and deployment, and maximum Mises stress in complete folding configuration as well as mass are set as the objectives to get the optimal performances. The modified NSGA-II is used to seek for an optimal design. The relative errors of the objectives between the optimal design and the FE analysis results are less than 3.5%.

Abstract: Parameter study for the qusai-static folding and deployment of opposite tape-spring flexure (OTSF) hinges is presented. The full factorial method is employed to design of experiments, and the qusai-static folding and deployment nonlinear analysis is obtained by ABAQUS/Explicit solver. Parametric studies show that both the section radius and the central angle have significant effects to the peak moment of quasi-static folding and deployment of the OTSF hinges. However, the maximum Mises stress in complete folding configuration is more sensitive to the central angle than the section radius.

Abstract: The paper deals with software Enterprise Resource Planning type application concerning the RMT (Release Management Tool). The application consists of a release deployment and transport management, inside in a large Oil and Gas Company. The software application has been developed using ABAP (Advanced Business Application Programming) a high level programming language integrated in SAP (System and Applications, Products) environment ABAP (Advanced Business Application Programming). Details regarding the analysis, implementation and testing of the software application are presented.

Abstract: IPv6 is intended to replace IPv4 in the Internet. Domain Name System (DNS) is an essential component of functionality of Internet. This paper presents new IPv6 characteristics, IPv6 DNS hierarchy, working process of IPv6 DNS, IPv6 address types, representation formats of IPv6 address, forward (reverse) resolver of IPv6 DNS, and the DNS transition from IPv4 to IPv6, combined with the practice to build the IPv6 experimental network of Peking University. We give corresponding solutions for the problems encountered in the IPv6 DNS deployment. This paper is of important reference value for IPv6 network researchers and engineers to build IPv6 DNS service in the IPv6 network.

Abstract: A new thin-walled tube flexible hinge with six slots is proposed. The slot geometry is parameterized in terms of slot width, length and distance between two adjacent slots. The experiment for tension test of the thin-walled tube hinge with six-slots is conducted by INSTRON and the tensile stress-strain curve is measured. Finite element analysis to investigate the quasi-static folding and deployment of the new hinges by ABAQUS/Explicit solver are employed to perform a series of parameter studies for the slots longitude length l₀, the slot width w and the distance d between two adjacent slots.

Abstract: IPv6 is a core protocol of next-generation Internet. The current IPv4 is turning to IPv6, and it is imperative. Colleges are ahead ofthe curve of the research and application of IPv6 Internet. And they put forward several ways of deployment of IPv6 in Campus Network, and provide specific IPv6 configuration technical proposal.

Abstract: Aiming at the cloud computing virtual machine deployment problem of low utilization rate of physical servers, this paper proposes several methods, using quantitative method considering the physical server CPU and memory to deploy the virtual machine, and consider the virtual machines and the physical servers CPU weights, comparing the virtual machines CPU weights with physical servers CPU weights, choose the physical server that the CPU weights is closest as a deployment target. The simulation results show that: these methods can effectively improve server utilization, reduce the number of physical servers.

Abstract: Wireless sensor networks have the advantages of low cost installation and flexibility, which make them an excellent mechanism for capturing environmental data and interacting with the physical environment for the application of building automation. However, radio propagation suffers from multi-path, shadowing and other radio interference problems in building environments. Therefore, deployment of sensor nodes in a dynamic in-building environment is a complex operation that requires expert knowledge and experience. In this paper, we present a deployment planning tool that can provide a set of useful tools for deploying a wireless sensor network in the building environment. The proposed deployment planning tool provides design tools that can assist users to develop a network infrastructure in order to support reliable communication. In addition, a network evaluation tool is provided to measure the index of network quality in order to ensure a reliable network quality. In order to evaluate the effectiveness of this tool, we designed a sensor network and simulated the network quality using this tool. The simulation results matched the experimental results of realistic deployment very well.

Abstract: Deployable structures, as an important kind of structure, have been widely used in a variety of satellite antennas and space reflectors. The research of deployable structures usually faces a series of theoretical and technical challenges because the size and mass are not only the limitations of deployable structure but also the key issues in the design process. Nevertheless, the appearance of bionic provides a new concept to develop the deployable structures. Inspired by the eclosion and development of butterfly wings, a bionic inflatable deployment structure has been presented in this paper. The whole system of emulate model is established and has a simulation analyzed with the help of dynamic analysis software. This simulation is aimed at emulating the deploying process, and calculating the stress distribution of the structure. Then some relative curve fitting is conducted on the deploying trajectory. A prototype has been fabricated and tested to be able to deploy smoothly and steadily.