Chaos gray-coded genetic algorithm and its application for pollution source identifications in convection–diffusion equation

Yang, Xiaohua; Zhang, Yang; Yin, Xinwei; Li, Jianqiang

doi:10.1016/j.cnsns.2007.03.003

Cited by 38 publications

(31 citation statements)

References 17 publications

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“…N, Global Allen et al (2007aAllen et al ( , 2007b, Haupt (2005), Haupt et al (2006Haupt et al ( , 2009Khlaifi, Ionescu, and Candau (2009);Yang, Yang, Yin, and Li (2008) For the continuous release, the Gaussian plume model (Daniel & Joseph, 2002) was employed. The relevant formulation is…”

Section: Y Localmentioning

confidence: 99%

Inverse calculation approaches for source determination in hazardous chemical releases

Zheng

Chen

2011

Journal of Loss Prevention in the Process Industries

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Section: Y Localmentioning

confidence: 99%

Inverse calculation approaches for source determination in hazardous chemical releases

Zheng

Chen

2011

Journal of Loss Prevention in the Process Industries

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“…River flow plays an important role in the development and management of water resources (Yang et al, 2008;Li et al, 2013), but the distribution of streamflow is highly uneven on the temporal scale (Miao and Ni, 2009). Recently, a considerable number of researchers have undertaken investigations into the topics in this field, such as streamflow circulation, riverflow oscillation and discharge prediction, etc.…”

Section: Introductionmentioning

confidence: 99%

Multi-scale analysis of streamflow using the Hilbert-Huang Transform

Yang

Zhang

et al. 2014

International Journal of Numerical Methods for Heat &Amp; Fluid Flow

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Purpose -The purpose of this paper is to simulate and analyze accurately the multi-scale characteristics, variation periods and trends of the annual streamflow series in the Haihe River Basin (HRB) using the Hilbert-Huang Transform (HHT). Design/methodology/approach -The Empirical Mode Decomposition (EMD) approach is adopted to decompose the original signal into intrinsic mode functions (IMFs) in multi-scales. The Hilbert spectrum is applied to each IMF component and the localized time-frequency-energy distribution. The monotonic residues obtained by EMD can be treated as the trend of the original sequence. Findings -The authors apply HHT to 14 hydrological stations in the HRB. The annual streamflow series are decomposed into four IMFs and a residual component, which exhibits the multi-scale characteristics. After the Hilbert transform, the instantaneous frequency, center frequency and mean period of the IMFs are obtained. Common multi-scale periods of the 14 series exist, e.g. 3.3a, 4B7a, 8B10a, 11-14a, 24B25a and 43B45a. The residues indicate that the annual streamflow series has exhibited a decreasing trend over the past 50 years.Research limitations/implications -The HHT method is still in its early stages of application in hydrology and needs to be further tested. Practical implications -It is helpful for the study of the complex features of streamflow. Social implications -This paper will contribute to the sustainable utilization of water resources. Originality/value -This study represents the first use of the HHT method to analyze the multi-scale characteristics of the streamflow series in the HRB. This paper provides an important theoretical support for water resources management.

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“…Chaos can be considered as the movement with a limited range occurred in a deterministic nonlinear dynamic system [5][6][7][8][9]. Such a movement is very similar to a random process.…”

Section: Introductionmentioning

confidence: 99%

Rainfall-runoff simulation using improved evolution algorithm based on pattern search

Yang

2012

2012 8th International Conference on Natural Computation

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Rainfall-runoff simulation is very important in practical environmental planning. To improve the computational accuracy for rainfall-runoff simulation, an improved evolution algorithm based on pattern search (IEAPS) is proposed, in which initial population are generated by chaos mapping and searching range is automatically renewed with the excellent individuals by pattern search. Its efficiency is verified by application of rainfallrunoff simulation for five rainfall events. Compared with standard binary-encoded genetic algorithm (SGA), pattern search algorithm (PSA), IEAPS has higher precision and rapider convergent speed. It is good for the global optimization in the practical rainfall-runoff simulation.

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Chaos gray-coded genetic algorithm and its application for pollution source identifications in convection–diffusion equation

Cited by 38 publications

References 17 publications

Inverse calculation approaches for source determination in hazardous chemical releases

Inverse calculation approaches for source determination in hazardous chemical releases

Multi-scale analysis of streamflow using the Hilbert-Huang Transform

Rainfall-runoff simulation using improved evolution algorithm based on pattern search

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