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《Power System Technology》 2006-13
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A Self-Adaptive Genetic Algorithm for Multi-Objective Reactive Power Optimization

XIA Ke-qing1,ZHAO Ming-qi2,LI Yang1 (1.Department of Electrical Engineering,Southeast University,Nanjing 210096,Jiangsu Province,China; 2.Yangzhou Power Supply Company,Yangzhou 225009,Jiangsu Province,China)  
Based on the factor of self-adaptive weight sum and self-adaptive penalty function, a self-adaptive genetic algorithm is proposed and applied to solve multi-objective reactive power optimization. By use of the proposed method the multidirectional property of searching can be ensured and the defect of fuzzy membership algorithm, namely the overlong computing time, can be avoided. During searching process the self-adaptive penalty function can effectively utilize the available information in infeasible solution and appropriately punish the infeasible solution. Results of IEEE 14-bus testing system show that the proposed algorithm is an effective method for multi-objective reactive power optimization.
【CateGory Index】: TM744
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【References】
Chinese Journal Full-text Database 10 Hits
1 WU Shi-sheng,QIN Gui-fang(Chongzuo Power Supply Bureau,qinzhou,Guangxi,China);Reactive Power Optimization Research on the Main Power Network Considered the Generation,Transmission and Distribution[J];Electric Switchgear;2011-03
2 LI Bang-feng,ZHANG Yong-jun,LI Yong,REN Zhen ( College of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong Province,China);A Survey on Modeling Approach of Optimized Dynamic Reactive Power Compensation in Receiving Systems[J];Power System Technology;2007-15
3 LOU Su-hua,WU Yao-wu,XIONG Xin-yin (Electric Power Security and High Efficiency Laboratory (Huazhong University of Science and Technology), Wuhan 430074,Hubei Province,China);Application of Multi-Objective Particle Swarm Optimization Algorithm in Power System Reactive Power Optimization Based on Evaluation of Distance in Fitness Space[J];Power System Technology;2007-19
4 WU Fang-jie,ZHANG Cheng-xue,DUAN Zhi-yuan(School of Electrical Engineering,Wuhan University,Wuhan 430072,Hubei Province,China);Application of Modified Particle Swarm Optimization in Reactive Power Optimization[J];Power System Technology;2007-24
5 FU Yang1,XU Zi-li1,CAO Jia-lin2 (1.School of Mechanical & Electronic Engineering and Automation,Shanghai University,Zhabei District,Shanghai 200072, China;2.Department of Electrical Engineering,Shanghai University of Electric Power,Yangpu District,Shanghai 200090,China);Application of Heuristic Particle Swarm Optimization Method in Power Network Planning[J];Power System Technology;2008-15
6 SU Peng,LIU Tian-qi,ZHAO Guo-bo,ZHANG Jiong (School of Electrical Engineering and Information,Sichuan University,Chengdu 610065,Sichuan Province,China);An Improved Particle Swarm Optimization Based Multi-Objective Load Dispatch Under Energy Conservation Dispatching[J];Power System Technology;2009-05
7 QIU Xiao-yan,ZHANG Zi-jian,LI Xing-yuan(School of Electrical Engineering and Information,Sichuan University,Chengdu 610065,Sichuan Province,China);Multi-Objective Reactive Power Optimization Based on Improved Genetic-Interior Point Algorithm[J];Power System Technology;2009-13
8 YANG Li-jun, LU Zhi-gang, WEN Ying (Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province (Institute of Electrical Engineering, Yanshan University), Qinhuangdao 066004, Hebei Province, China);Fault Recovery of Distribution Network Containing Asynchronous Wind Power Generation Units[J];Power System Technology;2010-02
9 LIN Guang-ming,OUYANG Sen,ZENG Jiang,JIANG Jin-liang (College of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong Province,China);Application of Improved Catastrophic Genetic Algorithms in Optimal Reactive Power Planning[J];Power System Technology;2010-04
10 SONG Ren-dong,WEN Bu-ying;Model for Optimal Reactive Power Flow of Electric Power System and Its Resolving:Optimization for Power Flow Based on Modified Particle Swarm Optimization Algorithm[J];Fujian Electric Power and Electrical Engineering;2007-03
【Citations】
Chinese Journal Full-text Database 10 Hits
1 Wang Qin, Fang Gefei(Zhejiang University, 310027, Hangzhou, China);MULTI-OBJECTIVE REACTIVE POWER OPTIMIZATION CONSIDERING VOLTAGE STABILITY[J];AUTOMATION OF ELECTRIC POWER SYSTEMS;1999-03
2 SONG Jun ying, LIU Di chen, CHEN Yun ping (Dept.of Electrical Engineering,Wuhan University, Wuhan 430072, Hubei Province,China);A FUZZY MODEL AND APPROACH FOR POWER SYSTEM REACTIVE POWER OPTIMIZATION[J];Power System Technology;2001-03
3 DAI Wen xia, WU Jie (Electrical Institute, South China University of Technology, Guangzhou 510641, Guangdong Province, China);A MODIFIED GENETIC ALGORITHM WITH ANNEALING SELECTION FOR REACTIVE POWER OPTIMIZATION[J];Power System Technology;2001-11
4 YUAN Hui,XU Gui-guang,ZHOU Jing-yang (China Electric Power Research Institute,Beijing 100085,China);A REACTIVE POWER/VOLTAGE OPTIMIZATION BASED ON FUZZY LINEAR PROGRAMMING[J];Power System Technology;2003-12
5 GENG Guang-fei, YANG Ren-gang (School of Information & Electric Engineering, China Agriculture University. Beijing 100083, China);REACTIVE POWER OPTIMIZATION OF REGIONAL POWER NETWORK BY DIRECTED MUTATION BASED GENETIC ALGORITHM[J];Power System Technology;2004-10
6 TAN Tao-liang;ZHANG Yao Electric Power Institute, South China University of Technology, Guangzhou 510640 Guangdong Province, China;REACTIVE POWER OPTIMIZATION BASED ON GENETIC/TABU SEARCH HYBRID ALGORITHM[J];Power System Technology;2004-11
7 ZHANG Wu-jun;YE Jian-feng;LIANG Wei-jie;FANG Ge-fei School of Electrical Engineerng, Zhejiang University, Hangzhou 310027, Zhejiang Province, China;MULTIPLE-OBJECTIVE REACTIVE POWER OPTIMIZATION BASED ON IMPROVED GENETIC ALGORITHM[J];Power System Technology;2004-11
8 ZHANG Yong-jun, YUYue, REN Zhen, LI Bang-feng ( Electrical Power College, South China University of Technology, Guangzhou 510640, Guangdong Province, China; Hainan Electric Power Dispatching Centre, Haikou 570203, Hainan Province, China);RESEARCH ON DYNAMIC MODELING FOR REACTIVE POWER OPTIMIZATION UNDER REAL-TIME CIRCUMSTANCE[J];Power System Technology;2004-12
9 XU Jin-dong,DING Xiao-qun,QIN Zhen-cheng,LI Chen (School of Electrical Engineering,Hohai University,Nanjing 210098,Jiangsu Province,China);A NONLINEAR PREDICTOR-CORRECTOR INTERIOR POINT METHOD FOR REACTIVE POWER OPTIMIZATION IN POWER SYSTEM[J];Power System Technology;2005-09
10 Gu Danzhen Shanghai Power Institute Shanghai, 200090 ChinaXu RuideZhejiang UniversityHangzhou, 310027 China;A NEW APPROACH FOR MULTIPLE OBJECTIVE REACTIVE POWER OPTIMIZATION——IMPROVED SIMULATED ANNEALING[J];POWER SYSTEM TECHNOLOGY;1998-01
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 ;Application of Reactive Power Optimization Based on Particle Swarm Optimization Algorithm with Tabu Search in Power System[J];Anhui Electric Power;2011-02
2 HAN Shi-fen (Department of Computer Science, University of Ezhou, Ezhou, Hubei 436000);Application of Fuzzy Adaptive Genetic Algorithm in Reactive Power Compensation Optimization of Countryside Power Station[J];Journal of Anhui Agricultural Sciences;2008-08
3 JIN Yi-gui(Anqing Hua Liang Ting Hydropower Station,Anqing 246412,China);Tidal Current Equation Solution of Power System By MATLAB[J];Journal of Anqing Teachers College(Natural Science Edition);2011-04
4 ZHANG Lin-jia,LIU Chen-qi(Department of Computer,Anshan Normal University,Anshan Liaoning 114007,China);Research and Application of Pareto Genetic Algorithm for Multi-objective Optimization[J];Journal of Anshan Normal University;2008-04
5 WEI Jian-jun1,KONG Yong-jian2,GUAN Yan-bin1 (1.Heilongjiang Institute of Engineering,Heilongjiang 150050,China;2.School of Civil Engineering and Architecture,Beijing Jiaotong University, Beijing 100044,China);Multiobjective Optimization in Pavement Maintenance and Rehabilitation Programming[J];Journal of Beijing Jiaotong University;2007-01
6 ZHANG Kai, ZHAO Guo-rong, JIANG Jing (Dept. of Control Engineering, Naval Aeronautical & Astronautical University, Yantai 264001, China);Application of PSO in Weapon Equipment Safeguard Resource Optimization[J];Ordnance Industry Automation;2010-01
7 ZONG Shi-zeng,QIAN Lin-fang,XU Ya-dong (School of Mechanical Engineering,Nanjing University of Science and Technology, Nanjing 210094,Jiangsu,China);Dynamic Coupling Analysis and Optimization of Gun Recoil Mechanism[J];Acta Armamentarii;2007-03
8 WANG Zhong-min1,DAI Yi1,ZHAO Hui2 (1.School of Mechanical Engineering,Tianjin University of Technology and Education,Tianjin 300222,China;2.Taiyuan Institute of China Coal Research Institute,Taiyuan 030006,Shanxi,China);Chaos Genetic Hybrid Algorithm and Its Application to Shear Stress Verifying of Spring[J];Acta Armamentarii;2009-08
9 Li Changlong Cheng Peng(School of Automation Science and Electrical Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100083,China)Chen Xiaobo Chai Xudong(Beijing Simulation Center,Beijing 100854,China);Parallel multi-objective genetic algorithm by adding area penalty[J];Journal of Beijing University of Aeronautics and Astronautics;2005-11
10 Li Huili Lang Lihui Jiao Wei Su Huaizhong (School of Mechanical Engineering and Automation,Beijing University of Aeronautics and Astronautics,Beijing 100191,China);Technology of light-weight design for wire-winding prestressed cylinder structure[J];Journal of Beijing University of Aeronautics and Astronautics;2009-07
China Proceedings of conference Full-text Database 10 Hits
1 LIU Zhixiong 1,2,3,YANG Guangxiang 4 1.College of Machinery and Automation,Wuhan University of Science and Technology,Wuhan 430081,P.R.China 2.Postdoctoral Programme,Tianjin Port(Group)Co.LTD,Tianjin 300461,P.R.China3.Engineering Research Center of Transportation Safety(Ministry of Education),Wuhan University of Technology,Wuhan 430063,P.R.China4.School of Computer Science and Information Engineering,Chongqing Technology and Business University,Chongqing,400067,P.R.China;Parallel Machine Scheduling Optimization Based On Roulette Probability Assignment Encoding[A];[C];2010
2 LI Huijun,YE Bin School of Information and Electrical Engineering,China University of Mining and Technology,Xuzhou 221116,P.R.China;A Multi-Step Model Predictive Control Method Based on Recurrent BP Neural Network[A];[C];2010
3 Zhang Qi-yi~1 Chang Shu-chun~1 Zhang Yong-li~2 1 Automobile management Institute of PLA,Bengbu,Anhui,233011 2 Engineering Institute of Engineering Corps,PLA Univ.of Science and Technology,Nanjing 210007,China;Application of improved genetic algorithm to road transportation equipment's rush-repair in battlefield[A];[C];2008
4 Zhang Qi-yi Tang Xiao-ping Li Zhen-dong Automobile Management Institute of PLA,Bengbu,233011,China;Research on military logistics transportation guarantee of combined service force for theater of operations based on improved genetic algorithm[A];[C];2008
5 Feng-Min Lu~1 Jian-Lin Jiang~1 Jin-Peng Xu~1 1 College of Science,Nanjing University of Aeronautics and Astronautics,Nanjing 211100;Partheno-genetic simulated annealing hybrid algorithm for multi-objective anti p-center problem[A];[C];2010
6 ;Studies on JSSP based on Parallel ACO[A];[C];2009
7 WEI Qian ZHANG Qiang (School of Management and Economics,Beijing Institute of Technology Beijing 100081);Research on Model and Algorithm for Uncertain Multi-level Warehouse Layout[A];[C];2009
8 Li Zheng-wen Wang Xiu-li Hu Ze-chun (Department of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,Shanxi Province.China);A Time-Based Control Strategy for Volt/Var Optimizatin in Distribution Systems[A];[C];2005
9 Yunzhi Mu Gengui Zhou Zhejiang University of Technology,College of Business Administration;A Two-Stage Genetic Algorithm for Solving the Degree-Constrained Minimum Spanning Tree Problem[A];[C];2007
10 ZHUO Xin~1,LOU Dao-an~2,WU Jian-ting~2,QI Yu~2 (1.Zhejiang University,Hangzhou,Zhejiang 310027,China; 2.Zhejiang Zhancheng Construction Group(Stock) Co.,Ltd.,Hangzhou,Zhejiang 310005,China);Research and Development on Construction Optimization Design Software Based on Artificial Intelligence Technology[A];[C];2007
【Co-references】
Chinese Journal Full-text Database 10 Hits
1 Zheng Qionglin Lu Guofeng Hao Rongtai (College of Mechanical and Electrical Engineering, Northern Jiaotong University,Beijing 100044);A Probe in Shunt Hybrid Compensator Topology with Reduced APF′s Rating and Terminal Voltage[J];JOURNAL OF NORTHERN JIAOTONG UNIVERSITY;1999-02
2 XIONG Qing-hui 1,ZHANG You-tong1,WANG Ding-biao2,ZHANG Xiao-kun3,LIU Yong-feng4,DING Xiao-liang1(1.School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;2.School of Chemical Engineering,Zhengzhou University,Zhengzhou,Henan 450002,China;3.CDAJ-China Co.,Ltd,Shanghai 200122,China;4.School of Mechanical and Electronic and Automobile Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China);Optimization Design of a Common Rail Injector Based on NSGA-Ⅱ Algorithm[J];Transactions of Beijing Institute of Technology;2010-10
3 Hou Chaoyong Zhuang Tong;Interconnection System to Connect Distributed Generation to Grid[J];The World of Inverters;2010-05
4 HE Zhi-jian1,LI Bao-shu1,LI Geng-yi2(1.North China Electric Power University,Baoding 071003,China;2.Hebei Electric Power Company,Shijiazhuang 050021,China);Loss Analysis of Economic Load Range in Transformer[J];Transformer;2011-01
5 Li Wenping Large Power Transformer Company, Baoding Tianwei Group Co.Ltd., Baoding 071056;Calculation for Zero-Sequence Impedance of Transformers[J];TRANSFORMER;1998-11
6 QI Hui,ZHOU Shumin,XIONG Ying(School of Sciences,Wuhan University of Technology, Wuhan 430070,China);A Particle Swarm Optimization with Step-accelerating Mutation Operator[J];Journal of Chengdu University(Natural Science Edition);2006-04
7 Zhou Yuying,Song Jingyu (System Engineering Research Institute of China State Shipbuilding Corporation,Beijing 100036,China);Static Var Compensator System Based on TCR[J];Marine Electric & Electronic Engineering;2009-02
8 MA Guoxi, LI Zhengguo, LUO An, YANG Yong (College of Information Science and Technology,Central South University,Changsha 410083,China);Multi-objective Optimization Design of IGBT Snubber Circuit Parameters for High Power STATCOM[J];Journal of Changsha University of Electric Power(Natural Science);2003-03
9 MA Yong-fei~1,ZHOU Ren-jun~1,WANG Xian-min~2,DENG Xue-hua~1 (1.College of Electrical and Information Engineeing,Changsha University of Science and Technology,Changsha 410076,China;2.Yemazhai Power Plant,Liupanshui 553011,China);Reactive Power Optimization Based on Global Sequential Quadratic Programming Algorithm[J];Journal of Changsha University of Electric Power(Natural Science);2006-03
10 ZHANG Jie-tan1,CHENG Hao-zhong1,YAO Liang-zhong2,HUANG Wei3,ZHU Da-kang3(1.Department of Electrical Engineering,Shanghai Jiaotong University,Shanghai 200240,China;2.AREVA T&D Technology Centre,Stafford,ST17 4LX,United Kingdom;3.Shanghai Municipal Electric Power Company,Shanghai 200122,China);Application of active management to distribution network with distributed generation[J];Journal of Electric Power Science and Technology;2008-01
【Secondary References】
Chinese Journal Full-text Database 10 Hits
1 WU Jia-xin1,LI Yan-liu2,ZHOU Heng-jun2,GUO Chuang-xin2(1.Xinxiang Power Supply Company,Hennan Xinxiang 453000,China;2.College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China);DNSGA_Ⅱ based multi-objective reactive power optimization considering compensation allocation[J];Journal of Electric Power Science and Technology;2010-04
2 WANG Xiu-yun,YANG Yan-liang,WANG Bin,YANG Dong-mei,LIU Li-wei(Electrical Engineering College,Northeast Dianli University,Jinlin Jinlin 132012);Application of optimization algorithm on simulating the fisher fishing in optimal reactive power[J];Journal of Northeast Dianli University;2011-02
3 Yu Tao1 Liu Jing1 Hu Xibing2(1.South China University of Technology Guangzhou 510640 China 2.Anqing Power Supply Corporation Anqing 246003 China);Optimal Power Flow for Complex Power Grid Using Distributed Multi-Step Backtrack Q(λ) Learning[J];Transactions of China Electrotechnical Society;2012-04
4 Tan Zhongfu Dong Litong Liu Wenyan Yu Chao Song Yihang(North China Electric Power University Beijing 102206 China);A Cooperation Game Optimization Model for Energy Generating Interchange between Power Generation Units with Environmental Emission Constraints[J];Transactions of China Electrotechnical Society;2012-05
5 SUN Jian-peng,HAN Wen-hua,ZHU Chang-dong(School of Electric Power and Automation Engineering,Shanghai University of Electric Power,Shanghai 200090,China);Research of Reactive Power Optimization Models and Algorithms[J];Power Capacitor & Reactive Power Compensation;2011-06
6 FU Yang1, MENG Ling-he2, LUO Ping-ping1, CAO Jia-lin1 (1. Shanghai Electric Power College , Shanghai 200090, China; 2. School of Electromechanical Engineering and Automation, Shanghai University, Shanghai 200072, China);Application of Particle Swarm Optimization Algorithm Based on Predatory Search Strategy in Transmission Power Grid Expansion Planning[J];Electric Power Construction;2009-03
7 ZHANG Yongjun, LI Yong, CAI Guanglin, REN Zhen(South China University of Technology, Guangzhou 510640, China);Modeling of Dynamic Voltage Support Optimization for Receiving Networks in Guangdong[J];Automation of Electric Power Systems;2007-24
8 LI Xiaoming,YANG Fan,SHU Xin,ZHOU Dongxu,SHEN Qing(Wuhan University,Wuhan 430072,China);Method of Reactive Power Control Optimization for Anti-icing in Transmission Networks with Controllable Line Losses[J];Automation of Electric Power Systems;2009-24
9 LI Zhikeng1,WANG Gang2,CHEN Zhigang1,ZHANG Yao2,ZHANG Lei1 (1.Guangdong Electric Power Design Institute,Guangzhou 510663,China;2.South China University of Technology,Guangzhou 510640,China);An Interval Load Flow Based Algorithm for Service Restoration in Distribution Network with Distributed Generations[J];Automation of Electric Power Systems;2011-24
10 WANG Kang1,LIU Chongru1,HAN Minxiao1,CAI Heng2 (1.State Key Lab of New Energy Power System,North China Electric Power University,Beijing 102206,China;2.Jiangxi Electric Power Research Institute,Nanchang 330096,China);A Method of Selecting DC Links Termination at AC Locations Considering Stability and Economy at Once[J];Automation of Electric Power Systems;2011-24
【Secondary Citations】
Chinese Journal Full-text Database 10 Hits
1 Win Jinyu', Jiang Zhenhua', Jiang Xial, Cheng Shine', Yang Wen-clang', Huang Jinming'(l. Huazhong University of Science and Technology, Wuhan 430074, China)(2. Ezhou Electrical Power Bureau, Ezhou 436000, China);GENETIC ALGORITHM BASED REACTIVE POWER OPTIMIZATIONAND ITS APPLICATION IN EZHOU CITY POWER SYSTEM[J];AUTOMATION OF ELECTRIC POWER SYSTEMS;2000-02
2 Liu Yutian, Ma Li(Shandong University of Technology, Ji'nan 250061, China);REACTIVE POWER OPTIMIZATION BASED ON TABU SEARCH APPROACH[J];AUTOMATION OF ELECTRIC POWER SYSTEMS;2000-02
3 Li Naihu,Ding Qia,Wang Xiaodong Southeast University,Nanjing2 10 0 96 ,China;PRIMAL-DUAL INTERIOR POINT METHOD BASED REAL-TIME VOLTAGE/REACTIVE POWER CONTROL ALGORITHM[J];AUTOMATION OF ELECTRIC POWER SYSTEMS;2000-05
4 Huang Hua, Xiong Xinying, Wu Yaowu. Huang Yijun(l. Huazhong University of Science and Technology, Wuhan 430074, China)(2. Hengyang Power Supply Bureau. Hengyang 421000, China);OPTIMIZATION OF REACTIVE POWER ALLOCATION BASED ON BOX ALGORITHM[J];AUTOMATION OF ELECTRIC POWER SYSTEMS;2000-20
5 Ni Wei,Shan Yuanda Southeast University,Nanjing2 1 0 0 96,China;A REFINED GENETIC ALGORITHM WITH OPTIMAL SEARCHING PATH USED IN POWER SYSTEM REACTIVE POWER OPTIMIZATION[J];AUTOMATION OF ELECTRIC POWER SYSTEMS;2000-21
6 Liu Mingbo1 ,Cheng Ying2 ,L in Shenghong1 1.South China U niversity of Technology,Guangzhou 5 10 6 40 ,China 2 .Suzhou Power Supply Bureau,Suzhou2 15 0 0 4,China;COMPARATIVE STUDIESOF INTERIOR-POINT LINEAR AND NONLINEAR PROGRAMMING ALGORITHMSFOR REACTIVE POWER OPTIMIZATION[J];Automation of Electric Power Systems;2002-01
7 Hu Zechun,Wang Xifan Xi'an Jiaotong U niversity,Xi'an710 0 4 9,China;TIME-INTERVAL BASED CONTROL STRATEGY OF REACTIVE POWER OPTIMIZATION IN DISTRIBUTION NETWORKS[J];Automation of Electric Power Systems;2002-06
8 Zhang Yongjun 1, Ren Zhen 1, Zhong Hongmei 1, Tang Zhuoyao 2, Shang Chun 2 (1. South China University of Technology, Guangzhou 510640, China)(2. Foshan Electric Power Bureau, Foshan 518000, China);CATACLYSMIC GENETIC ALGORITHMS BASED OPTIMAL REACTIVE POWER PLANNING[J];Automation of Electric Power Systems;2002-23
9 Wang Qin, Fang Gefei(Zhejiang University, 310027, Hangzhou, China);MULTI-OBJECTIVE REACTIVE POWER OPTIMIZATION CONSIDERING VOLTAGE STABILITY[J];AUTOMATION OF ELECTRIC POWER SYSTEMS;1999-03
10 SONG Jun ying, LIU Di chen, CHEN Yun ping (Dept.of Electrical Engineering,Wuhan University, Wuhan 430072, Hubei Province,China);A FUZZY MODEL AND APPROACH FOR POWER SYSTEM REACTIVE POWER OPTIMIZATION[J];Power System Technology;2001-03
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