The Experts below are selected from a list of 21288 Experts worldwide ranked by ideXlab platform
Wu Ling - One of the best experts on this subject based on the ideXlab platform.
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Analysis of the Effects of the Potential Target Distribution Area on the Anti-Jamming Capability of the Missile Seeker
2020Co-Authors: Wu LingAbstract:The long-range intelligent anti-ship missile(ASM) can search and attack target in a large zone at its terminal phase of trajectory,but the shape and size of the target Distribution Area will have influence on the anti-jamming capability of the missile seeker.Based on the analysis of the characteristics of the potential target Distribution Area,it is pointed out that the Area affects the start-up time of the missile radar,and consequently affects the anti-jamming capability of the missile seeker.The calculation model of the effects of the Area on the anti-jamming capability of the seeker is presented.The simulations on the operational use of the ASM under jamming validate the proposed model in evaluating the ASM effectiveness with the deteriorated anti-jamming capability.
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Simulation Models on the Influence of the Target Distribution Area on the Target-Choosing Probability of Anti-ship Missile
Mathematics in Practice and Theory, 2020Co-Authors: Wu LingAbstract:When anti-ship missile approaching the potential Distribution Area of the target, the search radar of the missile starts to search target.Based on the geometric or energy reflection characteristics of target,the missile employs some algorithm to choose one target for attack among all the detected targets,including the deployed decoys.The influence of the shape and size of the target Distribution Area on the probability of the missile choosing the true target has not been well investigated.In the paper,the influence function of the Area on the target-choosing probability is deduced.Based on the model of the timely decoys deployed by the goal ship,it presents in the paper seven target-choosing algorithms and the according simulation models.From the simulation results on the models it shows that the target Distribution Area will significantly influence the starting time of the missile radar, therefore influence the probability of true target choosing and the anti-jamming capability of the missile seeker.
Zhengjia Li - One of the best experts on this subject based on the ideXlab platform.
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Schematic Design of Comprehensive Economic Operation and Optimization Analysis System for Low-voltage Smart Distribution Area
DEStech Transactions on Environment Energy and Earth Science, 2017Co-Authors: Lefeng Cheng, Xin Wang, Zhengjia LiAbstract:Aimed at the problems that are generally existed in 10kV Distribution network Area, such as low automation and inaccessible remote monitoring, etc. An advanced Distribution economic operation and optimization analysis system was developed based on smart Area, which included smart Distribution Area, IDTT Distribution terminal, communication network and main station construction. In aspect of smart Distribution Area construction, the original Distribution Area was updated and rebuilt, and based on which, the basic monitoring and analysis function of Distribution Area was achieved, moreover, a new type of smart Distribution Area based on ZJP-II-type of Distribution terminal was designed. Its design principle and the main station construction scheme were discussed in details, and its main functions were summarized. Based on realtime monitoring, the whole system can make analysis on the Area load rate, reliability rate, balance rate, and load increase trend, etc. as well as make timely response to the faults occurred in Area, thus can achieve intelligent and refinement management on Distribution Area and provide guidance of the Distribution Area updating and rebuilding for the operation management units.
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Research on Construction of New-type Low Voltage Distribution Area based on Smart Distribution Transformer Terminal
Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015, 2015Co-Authors: Lefeng Cheng, Xueli Yang, Zhengjia LiAbstract:In Distribution automation systems, transformer terminal unit (TTU) which, as a basic unit was Distribution measurement and control equipment and was installed in branched Distribution box of power basement and communicated with power main station through the communication network. Its performance determined and had a direct impact on whether the whole Distribution automation system could work effectively. A new type of wall mounted intelligent Distribution terminal equipment was designed for Distribution network's operation and management, and which integrated Distribution transformer monitoring, power quality monitoring, temperature and humidity measurement, and low voltage switching communication. It also had high degree of integration, and advanced technique, and was powerful, and could support GPRS/GSM wireless communication mode and remote control, remote communication and remote software upgrade, so as to realize the upgrading of Distribution Area, with low investment and high cost performance.
Xiaohong Wang - One of the best experts on this subject based on the ideXlab platform.
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Power Transfer and Multi-Control Mode of a Distribution Network Based on a Flexible Interconnected Device
IEEE Access, 2019Co-Authors: Tonghua Wu, Yuping Zheng, Hongbin Wu, Hao Dong, Xiaohong WangAbstract:With large-scale access to distributed power sources in medium and low-voltage Distribution networks, the problem of insufficient local consumption capacity and source-charge mismatch in medium- and low-voltage Distribution stations has become increasingly prominent. Power transfer and control strategies based on a flexible interconnection device (FID) for a Distribution Area near a particular geographical location are studied in this paper. A two-terminal Distribution network model with tidal current complementarity is built based on a back-to-back (B2B) FID. A multi-mode operation method is proposed for power conversion under normal operation and power recovery under failure of one side, and a smooth switching strategy based on multiple control modes is also presented. Using this smooth switching method, an inverter controller is designed to form an integrated control unit. Finally, a simulation model of the Distribution Area with FID is built, and simulations of power transfer and mode switching under different working conditions are carried out. The correctness and effectiveness of the proposed method are verified.
Qin Luo - One of the best experts on this subject based on the ideXlab platform.
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A Remote Phase Change System for Low-Voltage Power Distribution Area
Advances in Intelligent Interactive Systems and Applications, 2018Co-Authors: Jiafeng Ding, Xinmei Li, Fei Gong, Zhifeng Li, Jing Liu, Xiao Liang, Qin LuoAbstract:Aiming at solving the problem of three-phase imbalance in three-phase four-wire low-voltage Distribution network, a remote phase change system based on bus ZigBee network for low-voltage power Distribution Area has been designed. The system consists of a master control terminal and multiple intelligent phase change switches and the bus ZigBee communication network is constructed with ARM microprocessor and CC2630 as core: The master control terminal implements the download of the phase change command and the upload of the load status by the ZigBee coordinator technology; Intelligent phase change switch can swap phase sequence within 20 ms without power interruption by zero-cross switching technology based on permanent magnet relay. Compared with traditional compensation and other methods, this design provides a fast and safe way to controls three-phase balance from the load management and has better application prospects. Experimental tests showed that the system could run well and meet the power system requirements.
Chiara Urbinati - One of the best experts on this subject based on the ideXlab platform.
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Contrasting tree-ring growth to climate responses of Abies alba toward the southern limit of its Distribution Area
Oikos, 2010Co-Authors: Marco Carrer, Paola Nola, Renzo Motta, Chiara UrbinatiAbstract:Silver fir Abies alba is an indigenous tree species present in many southern European mountain forests. Its Distribution Area and its adaptive capacity to climate variability, expressed in tree-ring growth series, make it a very suitable target species for studying responses to climate particularly in a complex Area like the Mediterranean basin where significant changes are expected. We used a set of 52 site chronologies (784 trees) in the Italian Alps and Apennines (38.1 degrees-46.6 degrees N and 6.7 degrees-16.3 degrees E) and temperature and precipitation monthly data for the period 1900-1995. Principal component analyses of the tree-ring site network was applied to extract common modes of variability in annual radial growth among the chronologies. Climate/growth relationships and their stationarity and consistency over time were computed by means of correlation and moving correlation functions. Tree-ring chronologies show a clear distinction between the Alpine and the Mediterranean sites and a further separation of the Alpine region in western and eastern sectors. Accordingly, we found different transient and contrasting regional responses in time with the trends found in the Mediterranean sites marking a relaxation of some of the major climate limiting factors recorded prior to the last decades. Species' sensitivity to global change may result in distinct spatial responses reflecting the complexity of the Mediterranean climate, with large differences between various Areas of the basin. It is still unclear if these contrasting tree-ring growth to climate responses of Abies alba are due to the corresponding separation between the Alpine and Mediterranean climate modes, the atmospheric CO2 fertilization effect, the environmentally most fitted genetic pools of the southern fir ecotypes or a combination of all factors. Climate-growth analysis based on a wide site network and on long-term weather records confirmed to be excellent tools to detect spatial and temporal variability of species' responses to climate.
