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A hybrid method of Solving the Electromagnetic Inverse Scattering Problem in Lossy Medium

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Chinese Physics Letters 2010年第5期27卷 113-116页

作者：杨曦张宇苟铭江史庆藩孙刚 School of Information and Electronics Beijing Institute of Technology Beijing 100081 School of Science Beijing Institute of Technology Beijing 100081 Beijing Nationa/Laboratory for Condensed Matter Physics and Key Laboratory of Soft Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190

A hybrid method of solving the electromagnetic inverse scattering problem in a lossy medium is proposed. The gradient search method is first used to determine the spatial distribution of the target, then the Monte Carlo method is selected to calculate the conductivity and permittivity of the scatterer. The results of numerical experiments verify that the hybrid method of combining the two ways is high-precision, efficient, and suited to global optimization.

关键词： hybrid method hybrid method

A NEW hybrid method TO OBTAIN VISCOELASTIC PRINCIPAL STRESS

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Acta Mechanica Sinica 1993年第2期9卷 185-192页

作者：陈瑜海 Department of Water Resource and Harbour Engineering Tianjin UniversityTianjin 300072China

The basic relations in linear isotropic photoviscoelasticity have been theoretically discussed in de- tails.A new routine has been found to obtain the time-dependent principal stress without the measurement of *** a t... 详细信息

关键词： photoviscoelasticity Laplace transformation boundary element method hybrid method

Short-term wind power forecasting using hybrid method based on enhanced boosting algorithm

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Journal of Modern Power Systems and Clean Energy 2017年第1期5卷 126-133页

作者： Yu JIANG Xingying CHEN Kun YU Yingchen LIAO College of Energy and Electrical Engineering Hohai UniversityNanjing 210098China

Day-ahead wind power forecasting plays an essential role in the safe and economic use of wind energy,the comprehending-intrinsic complexity of the behavior of wind is considered as the main challenge faced in improving forecasting *** improve forecasting accuracy,this paper focuses on two aspects:①proposing a novel hybrid method using Boosting algorithm and a multistep forecast approach to improve the forecasting capacity of traditional ARMA model;②calculating the existing error bounds of the proposed *** validate the effectiveness of the novel hybrid method,one-year period of real data are used for test,which were collected from three operating wind farms in the east coast of Jiangsu Province,*** conventional ARMA model and persistence model are both used as benchmarks with which the proposed method is *** results show that the proposed method achieves a more accurate forecast.

关键词： hybrid method Multi-step-ahead prediction Wind power forecast Boosting algorithm Time series model

Predicting the Endpoint Phosphorus Content of Molten Steel in BOF by Two-stage hybrid method

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Journal of Iron and Steel Research(International) 2014年第S1期21卷 65-69页

作者： Hong-bing WANG Jun CAI Kai FENG School of Computer and Communication Engineering University of Science and Technology Beijing Beijing Key Laboratory of Knowledge Engineering for Materials Science School of Metallurgical and Ecological Engineering University of Science and Technology Beijing

A two-stage hybrid method is proposed to predict the phosphorus content of molten steel at the endpoint of steelmaking in BOF(Basic Oxygen Furnace). At the first clustering stage, the weighted K-means is performed to produce clusters with homogeneous data. At the second predicting stage, each fuzzy neural network is carried out on each cluster and the results from all fuzzy neural networks are combined to be the final result of the hybrid method. The hybrid method and single fuzzy neural network are compared and the results show that the hybrid method outperforms single fuzzy neural network.

关键词： K-means clustering fuzzy neural network hybrid method predicting endpoint phosphorus content

Boosted hybrid method for Solving Chemical Reaction Systems with Multiple Scales in Time and Population Size

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Communications in Computational Physics 2012年第9期12卷 981-1005页

作者： Yucheng Hu Assyr Abdulle Tiejun Li Laboratory of Mathematics and Applied Mathematics and School of Mathematical Sciences Peking UniversityBeijing 100871China Mathematics Section Ecole Polytechnique Federale de LausanneCH-1015 LausanneSwitzerland

A new algorithm,called boosted hybrid method,is proposed for the simulation of chemical reaction systems with scale-separation in time and disparity in species *** such stiff systems,the algorithm can automatically identify scale-separation in time and slow down the fast reactions while maintaining a good approximation to the original effective *** technique is called *** disparity in species population may still exist in the boosted system,we propose a hybrid strategy based on coarse-graining methods,such as the tau-leaping method,to accelerate the reactions among large population *** combination of the boosting strategy and the hybrid method allow for an efficient and adaptive simulation of complex chemical *** new method does not need a priori knowledge of the system and can also be used for systems with hierarchical multiple time *** experiments illustrate the versatility and efficiency of the method.

关键词： Chemical reaction multiscale boosting hybrid method

hybrid method: Review, Modularization and Application

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Systems Science and Systems Engineering 1999年第4期9卷 2-8页

作者： XU Yi\|ping,\ CHEN Xi\|kang,\ LU Yan Institute of Systems Science, Academia Sinica, Beijing 100080,China

The objective of this approach is to introduce the idea of modular design into the construction of hybrid model, thus, each step has it own unique function, the entries of superior data decrease and the directions of data flow are more clear. Although the approach itself cannot guarantee the accuracy of the target table which depends on the accuracy of the survey data, experience of experts and assumption in deriving, it does can help constructors to arrange their thoughts, thereby subjective errors could be brought down significantly. As an example, a case analysis is employed to show the effectiveness of the method in detail.

关键词： hybrid method coefficient updating method input\|output model

A hybrid method FOR SOLVING VARIATIONAL INEQUALITY PROBLEMS

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Applied Mathematics(A Journal of Chinese Universities) 2000年第4期15卷 470-482页

作者： LiangXiming LiFei XuChengxian CollegeofInformationScienceandEngineering CentralSouthUniv.Changsha410083. SchoolofScience Xi＇anJiaotongUniv.Xi＇an710049

By using Fukushima's differentiable merit function,Taji,Fukushima and Ibaraki have given a globally convergent modified Newton method for the strongly monotone variational inequality problem and proved their method to be quadratically convergent under certain assumptions in *** this paper a hybrid method for the variational inequality problem under the assumptions that the mapping F is continuously differentiable and its Jacobian matrix Δ F(x) is positive definite for all x∈S rather than strongly monotone and that the set S is nonempty,polyhedral,closed and convex is *** type line search and trust region strategies as well as Fukushima's differentiable merit function are incorporated into the *** is then shown that the method is well defined and globally convergent and that,under the same assumptions as those of Taji et al.,the method reduces to the basic Newton method and hence the rate of convergence is *** experiences show the efficiency of the proposed method.

关键词： Variational inequality problem line search trust region strategy hybrid method global convergence quadratic convergence.

TWO DIMENSIONAL FLOW QUANTITATIVE VISUALIZATION BY THE hybrid method OF FLOW BIREFRINGENCE AND BOUNDARY INTEGRATION

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Acta Mechanica Sinica 1992年第1期8卷 88-92页

作者：陈瑜海贾有权 Department of Water Resource and Harbour Engineering Department of Mechanics. Tianjin University Tianjin China 300072

Flow birefringent method and its data processing was reviewed and a new hybrid method of flow birefringence and boundary integration was introduced. The basic equations and boundary conditions suitable to the hybrid method were derived, and a comparison of the hybrid and other classical methods was given. Finally as an example, the flow in a step converging tube was analyzed by the given method.

关键词： flow birefringence hybrid method boundary integration

USING MOIRE INTERFEROMETRY AND BOUNDARY INTEGRAL hybrid method TO DETERMINE MIXED-MODE STRESS INTENSITY FACTOR

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Acta Mechanica Sinica 1988年第4期4卷 319-326页

作者： Jia Youquan Xie Jinan Wang Yinyan (Department of Mechanics,Tianjin University) Department of Mechanics Tianjin University Tianjin China

The paper describes a hybrid experimental and numerical method of Moiré Interferometryand the boundary-integral-element *** interference patterns used for the evaluation of thedisplacement vector are obtained by Moiré *** boundary displacements obtainedexperimentally are conveniently used for the calculation of the stress intensity factor in the body by *** examples bear witness to the effectiveness and accuracy of the hybridtechnique.

关键词： Moiré interferometry method boundary integral element method hybrid method stress intensity factor