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Lin Bingnan,Zhou Jianjun
Strategic Study of CAE 2004, Volume 6, Issue 4, Pages 30-33
In this preliminary study, it is shown that for a reservoir on a river of rich runoff, such as the Yangtze, elaborate scheme of sediment management may be devised to substantially reduce reservoir deposition. The mathematical model applied in this investigation has been fairly well verified with long - term field data of sediment transport by unsteady flow in the Lower Yellow River. In view of the importance of TGP, however, further investigation with physical models and mathematical model of other versions is planned. Great financial benefits are involved.
Keywords： sediment management reservoir suspended load deposition flood stage
Study of Stability of Production Scheduling
Li Qiqiang,Shi Kaiquan
Strategic Study of CAE 2001, Volume 3, Issue 3, Pages 75-79
A production scheduling solution involves a great deal of constrains, which determine the feasibility of the solution. So the study of the stability orientated to constrains is the focus of this paper. The definitions of the satisfaction degree of hard constrains and soft constrains are presented, and a concept of stable degree of production scheduling is proposed. A simulation result demonstrates the significance of the stability degree of scheduling in practical production processes.
Keywords： production scheduling constrains satisfaction degree scheduling stability
Operation and regulation of Three Gorges Reservoir
Zhang Shuguang,Zhou Man
Strategic Study of CAE 2011, Volume 13, Issue 7, Pages 61-65
Since the impoundment of Three Gorges Reservoir in 2003, the construction schedule, resettlement and geological hazard treatment were ahead of those in the preliminary design. The sedimentation conditions were obviously better than expected, and the goal of stage-by-stage impoundment was achieved in advance. Simultaneously, with the changes in operating conditions, optimum operations such as floating control of flood limit water level, medium and small flood regulation and impounding in advance were carried out, which produced enormous comprehensive benefits in flood control, drought relief, navigation, water supply and ecology. Especially during the flood season in 2010, the flood retention and storage capacity reached totaled 26.6 billion m3 through medium and small sized flood regulation, and the flood resources were fully utilized. In the end of the flood season, the flood resources were fully utilized and the water lever reached 175 m first with the joint operation of flood control and water storage. Then the project began to give full play to its comprehensive benefits during the normal operation period.
Keywords： operation and regulation Three Gorges Project
The flood control and regulation of Three Gorges Project
Cai Qihua
Strategic Study of CAE 2011, Volume 13, Issue 7, Pages 15-19
The important role of TGP in the flood control of the Yangtze River Basin is summarized and the "Optimum Regulation Schemes of the Three Gorge Reservoir" is briefly described. In combination with practical flood regulation and operation, the flood regulation effect of TGP is analyzed; several problems related to reservoir flood regulation are discussed and suggestions are put forward for the future work.
Keywords： Three Gorges Project flood control regulation
The Optimal Control Model of Reservoir Operations andSolving With Maximum Principle
Fang Qiang,Wang Xianjia, Fang Debin
Strategic Study of CAE 2007, Volume 9, Issue 4, Pages 55-59
This paper tries to describe the continuous transformation characteristic of reservoir operations with optimal control theory. After constructing the optimal control model of reservoir o perations, the paper presents the necessary condition of optimal control of reservoir operations using maximum principle and analyzes the characteristic and concrete expression of optimal control strategy of reservoir operations in different conditions and environment. At last, an analysis of a numerical example is presented and the results indicate the approach is valid.
Keywords： water conservancy management optimal control model maximum principle reservoiroperations
Variable-separating-based Space Decomposition Algorithm of Production Scheduling
Gao Yongchao,Li Qiqiang,Ding Ran,Guo Qingqiang
Strategic Study of CAE 2006, Volume 8, Issue 9, Pages 61-64
Most static production scheduling problems are formulated in MILP ( mixed integer linear programming) or MINLP(mixed integer non-linear programming) . It is difficult to find solutions of scheduling because of its large scale and combinatorial characters. According to the features of MIP (mixed integer programming), integral variables and continuous variables are separated and the searching space is decomposed naturally into many continuous subspaces of less scale. Taking a typical batch production scheduling as a case, the analysis shows that variable-separating strategy decreases the scale of continuous searching problem greatly and makes it easy to solve, which can improve the speed and efficiency of optimization.
Keywords： production scheduling space decomposition sub-definite method
Multiobjective Decision Making Theory and Model for Floodcontrol Operation
Chen Shouyu
Strategic Study of CAE 2000, Volume 2, Issue 2, Pages 47-52
Analyzing the status of floodcontrol operation in china, this paper sumarized decision making problems of floodcontrol and proposed multiobjective decision making theory, model and methods. These include some new achievements such as multiobjective fuzzy optimum seeking theory and model for multilayer system ,definition of objective weight etc. some of the theory and model were applied to reservoirs floodcontrol operations and satisfactory results were achieved.
Keywords： Floodcontrol operation decision making multiobjective objective weight
Dai Jianyong,Yang Shijiao,Gu Desheng
Strategic Study of CAE 2006, Volume 8, Issue 8, Pages 77-80
According to complexity and non-lineer character of transportation scheduling system in surface mine, the real time transportation scheduling system model is set up for the transportation scheduling system subject to many factors such as mining craft, yield, quality, etc., with all arithmetic operators of genetic algorithms such as selection, crossover, mutation, interpotation, and migration. The model has been adopted by production transportation scheduling system of raw material quarry in Shaofeng Cement Group, which not only reduced transportation cost, but also harmonized relations among mining craft, yield, quality, and got better effect. In the meantime, it will be of benefit to information construction of quarry enterprises and others materials circulation enterprises.
Keywords： genetic algorithms transportation scheduling system transportation cost
Fuzzy Modeling Theory on Production Scheduling： A Survey
Zhang Hong,Li qiqiang,Guo qingqiang,Zhang Peng,Gao Yuan
Strategic Study of CAE 2005, Volume 7, Issue 12, Pages 92-102
A brief survey on classical modeling theory of production scheduling is presented in this paper. With the combination of fuzzy mathematical theory and classical modeling or intelligent methods, a brief survey on fuzzy modeling theory is also presented. Some perspective viewpoints are pointed out in the last section of the paper.
Keywords： production scheduling fuzzy mathematics fuzzy modeling
The Improvement of Genetic Algorithm and Its Application in the Optimal Operation of Reservoirs
Zhong Denghua,Xiong Kaizhi,Cheng Liqin
Strategic Study of CAE 2003, Volume 5, Issue 9, Pages 22-26
Genetic algorithms search for the optimal solution by continually improving the individual of the population. Because of the difficulty in convergence and solving of individual fitness, standard genetic algorithm (SGA) is not used widely. Based on the improvement of SGA, especially the improvement of the selection operator in SGA, a new genetic algorithm(AGA) is proposed to solve the problems about the optimal operation of reservoirs. A new coding method is presented which is based on the subscript sequence of reservoir capacity array other than the water level sequence. An engineering example illustrates that AGA is much more efficient than SGA, and also the new coding method predigests the course of genetic algorithm in the optimal operation of reservoirs.
Keywords： genetic algorithm improvement reservoir optimal operation
Fuzzy Programming Based Modeling of Production Scheduling of Batch Processes
Zhang Hong,Li Chiqiang
Strategic Study of CAE 2004, Volume 6, Issue 10, Pages 65-70
By analyzing certain fuzzy models for production scheduling, the author proposes a general novel fuzzification method based on fuzzy programming for batching production processes and offers a modeling method with fuzzy coefficients. Two fuzzy algorithms based on genetic algorithm, i. e. , fuzzy simulation and SFA algorithm, are adopted to solve the fuzzy model. The selection of membership function is flexible, and a proper expression of fuzziness is adopted. Finally, a numerical example demonstrates that the modeling method is valid.
Keywords： production scheduling fuzzy programming batching production processes membership function
Li Hongbin,Zhang Chenghui,Song Jun
Strategic Study of CAE 2001, Volume 3, Issue 9, Pages 52-57
The paper analyzes common methods for the optimal scheduling modeling problem of variable-pressure variable-flow operation of inverter-drive pumps connected in parallel and compares the merits and defects of them. In the common method, the objective function is the shaft horsepower of the pumps and the constrained conditions are water supply target and high-efficiency area of pumps. In another method, the objective function is the square of the difference between the actual and needed flow when satisfying the lift target and the constrained conditions are high-efficiency areas of pumps. The paper proposes a new modeling method, which is compatible with the actual operation and has higher precision and satisfies the engineering requirement on lower switching frequency. Simulation results have proved its validity.
Keywords： optimal scheduling nonlinear bounded programming speed regulation of pumps
Resource scheduling techniques in cloud from a view of coordination: a holistic survey Review
Yuzhao WANG, Junqing YU, Zhibin YU,yuzhao_w@hust.edu.cn,yjqing@hust.edu.cn,zb.yu@siat.ac.cn
Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 1, Pages 1-40 doi: 10.1631/FITEE.2100298
Keywords： Coordination Co-location Heterogeneous computing Microservice Resource scheduling techniques
Minimum Reserved Traffic Rate Based Fair Scheduling Algorithm in IEEE 802.16e
Shi Juncai,Hu Aiqun,Guan Yanfeng
Strategic Study of CAE 2008, Volume 10, Issue 2, Pages 54-59
According to the characteristics of IEEE 802.16-2005, a minimum reserve d traffic rate based fair scheduling algorithm in IEEE 802.16-2005 is proposed in this paper. It can support multiple service types and guarantee every service´s minimum reserved traffic rate. A compensation strategy is introduced to ensure m inimum reserved traffic rate of service which is in bad channel condition. At th e same time, services which have higher priority and are in good channel conditi on are granted more bandwidth to ensure the QoS (quality of service) and maximiz e the throughput performance. The simulation study shows that the algorithm can guar antee the minimum reserved traffic rate and distinguish the services in differen t levels. Furthermore, the algorithm has advantages in both fairness and through p ut performance compared with PF (proportional fair) algorithm. The algorithm pro posed in this paper is in accordance with IEEE 802-16-2005 and has gre at value.
Keywords： IEEE 802-16-2005 scheduling algorithm QoS fairness
A Study on Resource Fairness Scheduling Algorithms forthe OFDMA Systems
Zhang Dongmei,Chen Youyun,Cai Yueming
Strategic Study of CAE 2007, Volume 9, Issue 6, Pages 77-81
The paper studied the radio resource fairness scheduling for Orthogonal Frequency Division Multiplexing Multiple Access (OFDMA) systems which was supporting several different services. After deeply analyzing a classical resource scheduling algorithm, which maximize the worst user's capacity, an improved algorithm which can evidently enhance the fairness performance was proposed. Simulation results show that the improved algorithm can keep a better fairness performance under different application environment, and can more strictly guarantee the required data rate for different service.
Keywords： OFDMA radio resource scheduling sub-carrier allocation power allocation
Title Author Date Type Operation
The Optimal Control Model of Reservoir Operations andSolving With Maximum Principle
Fang Qiang,Wang Xianjia, Fang Debin
Journal Article
Variable-separating-based Space Decomposition Algorithm of Production Scheduling
Gao Yongchao,Li Qiqiang,Ding Ran,Guo Qingqiang
Journal Article
Multiobjective Decision Making Theory and Model for Floodcontrol Operation
Chen Shouyu
Journal Article
The Real Time Optimization Research and Application for Transportation Scheduling System About Material Quarry of Cement With Genetic and Evolutionary Algorithm
Dai Jianyong,Yang Shijiao,Gu Desheng
Journal Article
Fuzzy Modeling Theory on Production Scheduling： A Survey
Zhang Hong,Li qiqiang,Guo qingqiang,Zhang Peng,Gao Yuan
Journal Article
The Improvement of Genetic Algorithm and Its Application in the Optimal Operation of Reservoirs
Zhong Denghua,Xiong Kaizhi,Cheng Liqin
Journal Article
Fuzzy Programming Based Modeling of Production Scheduling of Batch Processes
Zhang Hong,Li Chiqiang
Journal Article
Optimal Scheduling of Variable-pressure Variable-flow Operation of Inverter-drive Pumps Connected in Parallel
Li Hongbin,Zhang Chenghui,Song Jun
Journal Article
Resource scheduling techniques in cloud from a view of coordination: a holistic survey
Yuzhao WANG, Junqing YU, Zhibin YU,yuzhao_w@hust.edu.cn,yjqing@hust.edu.cn,zb.yu@siat.ac.cn
Journal Article
Minimum Reserved Traffic Rate Based Fair Scheduling Algorithm in IEEE 802.16e
Shi Juncai,Hu Aiqun,Guan Yanfeng
Journal Article
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