Entity

Time filter

Source Type


Wang C.,Huazhong University of Science and Technology | Wang X.,Huazhong University of Science and Technology | Zhou J.,Hubei Key Laboratory of Digital Valley Science and Technology | Zhang C.,Huazhong University of Science and Technology
Proceedings - 2015 International Conference on Control, Automation and Robotics, ICCAR 2015 | Year: 2015

This paper focus on the ecological optimization operation problem of the Three Gorges reservoir in flood recession. In this season, the primary goal of the reservoir is impounding to get the maximum economic benefit. As people increasing concern about their environment, impact of the reservoir operation to the aquatic habitat at the downstream area becomes an increasing important factor. The conflict between economic benefit and habitat conservation makes the dispatch a multi-objective problem. In this paper, stored energy at the end of dispatch period is proposed to be the economic objective and the weighted usable area (WUA) of the habitat is used to represent the environmental demand. The multi-objective differential evolution (MODE) and a particular constraint handling strategy proposed in this paper are used to solve this problem. Simulation results show that the proposed constraint handling strategy improves the performance of MODE in solving this problem. More importantly, the Pareto optimal front of different operating condition shows that the conflict between economic benefit and environmental benefit is sharp, especially in low flow years. The degree of conflict relates to the value of average inflow. So it is necessary to consider the habitat conservation while operating. And this work provides a support to aquatic organism protection and ecological operation of the Three Gorges reservoir. © 2015 IEEE.


Zhou J.,Huazhong University of Science and Technology | Zhou J.,Hubei Key Laboratory of Digital Valley Science and Technology | Pan L.,Huazhong University of Science and Technology | Pan L.,Hubei Key Laboratory of Digital Valley Science and Technology | Ge M.,Sias International University
2013 3rd International Conference on Consumer Electronics, Communications and Networks, CECNet 2013 - Proceedings | Year: 2013

With the development and wide application of virtual reality in various industries, three-dimensional virtual visual simulation technique has become an important presentation manner in water conservancy project information management. After the relevant support technologies such as GIS, Remote sense, computer graphics and water rendering are deeply researched, this paper presents a development framework about three-dimensional virtual visual simulation system (3D VVSS) of large-scale urban lakes. Combining with the large-scale ecological water network scheduling project of Dong Lake in Wuhan city of Hubei province and OpenSceneGraph platform, a 3D VVSS of urban lakes is constructed, which can provide virtual roaming, information query, real time monitor information of water quality displaying, etc. Finally, some optimized measures are discussed to improve running speed and efficiency of the VVSS. © 2013 IEEE.


Wang X.-M.,Huazhong University of Science and Technology | Zhou J.-Z.,Huazhong University of Science and Technology | Zhou J.-Z.,Hubei Key Laboratory of Digital Valley Science and Technology | Ou Yang S.,Huazhong University of Science and Technology | And 2 more authors.
Shuili Xuebao/Journal of Hydraulic Engineering | Year: 2013

The optimal ecological flow of Yichang station is determined as ecological benefit evaluation standard based on monthly frequency computation method and ecology elements of the Yangtze River. An eco-friendly generation multi-objective optimal dispatch model of cascade reservoir is proposed according to the major ecology problems and the specific engineering practice in the Three Gorges Cascade (TGC). A dual-subpopulation multi-objective differential evolution algorithm with external archive, elitist selection and chaotic migration is presented to solve the optimal dispatch model. The results reveales that a lot of non-dominated and uniformly dispatch schemes for decision-making can be generated in short time.


Xue X.M.,Huazhong University of Science and Technology | Zhou J.Z.,Huazhong University of Science and Technology | Zhou J.Z.,Hubei Key Laboratory of Digital Valley Science and Technology | Zhang Y.C.,Huazhong University of Science and Technology | And 3 more authors.
Applied Mechanics and Materials | Year: 2013

The end effects is a serious problem in the applications of the empirical mode decomposition (EMD) method. To deal with this problem, an extrema extension method based on the support vector regression (SVR) is proposed in this paper. In each iterating process of the EMD method, the SVR method is employed to predict one maximum and a minimum point respectively at the both ends of the original data series to form the relatively true upper and lower envelope, thus the end effects can be restrained effectively. The prediction of an extrema point includes two parts, the forecast of the extreme value and location. In contrast with other traditional extrema extension methods, such as the extrema mirror extension and linear fitting extension method, the decomposed results from the simulation and actual signals demonstrated that this proposed method has a better performance in eliminating the end effects related to the empirical mode decomposition. © (2013) Trans Tech Publications, Switzerland.


Bi S.,Huazhong University of Science and Technology | Bi S.,Hubei Key Laboratory of Digital Valley Science and Technology | Zhou J.,Huazhong University of Science and Technology | Zhou J.,Hubei Key Laboratory of Digital Valley Science and Technology | And 7 more authors.
Shuikexue Jinzhan/Advances in Water Science | Year: 2013

Numerical solution of flow-transport equations usually has to handle complex surface topography, numerical damping effect and numerical oscillation. In order to solve these problems, a high-performance Godunov-type finite volume model is proposed. An approximate Harten-Lax-van Leer-Contact (HLLC) Riemann solver for the integration of transport convection terms is used in the model development to calculate the mass fluxes and transport fluxes. The model can capture shock waves, reduce the numerical damping effect and overcome the numerical oscillation problems. A weighted surface-depth gradient method and the Minmod limiter are used for water depth's reconstruction to improve the model accuracy. Moreover, the Hancock predictor-corrector method is adopted for time stepping. Numerical results show that the proposed model is highly accurate and stable, and can significantly reduce the numerical damping effect. Thus, the model is suitable for simulating the transport problems in complex water flow and has a wide range of application potentials.

Discover hidden collaborations