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Optimization design of anti-seismic engineering measures for intake tower based on non-dominated sorting genetic algorithm-II

Frontiers of Structural and Civil Engineering   Pages 1428-1441 doi: 10.1007/s11709-023-0998-2

Abstract: northwest China was considered the research object, and its natural vibration characteristics and dynamic responsewere first analyzed using the mode decomposition response spectrum method based on a three-dimensionaladopted to optimize the anti-seismic scheme combination by comprehensively considering the dynamic tower responseThe method adopted in this study may provide significant references for designing anti-seismic measures

Keywords： intake tower     NSGA-II     mode decomposition response spectrum method     anti-seismic engineering measures    

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Relative vibration identification of cutter and workpiece based on improved bidimensional empirical modedecomposition

Jiasheng LI, Xingzhan LI, Wei WEI, Pinkuan LIU

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 227-239 doi: 10.1007/s11465-020-0587-1

Abstract: In this study, the bidimensional empirical mode decomposition (BEMD) method is used to identify suchThe decomposition examples show that the improved BEMD can effectively solve the problem of boundaryIn addition, the spatial spectrum analysis of the extracted profile is carried out.effect on the shape of the contour can be accurately identified through contour extraction and spatial spectrumThe decomposition results of simulation and experimental surface morphology demonstrate the validity

Keywords： bidimensional empirical mode decomposition     spatial spectrum analysis     boundary effect     vibration identification    

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Identification of system mode parameters using response measurement only

Huo Bingyong and Yi Weijian

Strategic Study of CAE 2015, Volume 17, Issue 1,   Pages 151-160

Abstract:

With the broadest application and development of modal analysis method， the demands such as less restrictiveThis paper presents a new modal analysis method without input data and any analytical models.Harmonic parameters of a point response can be extracted by spectrum analysis using the measurementsdiscrete deconvolution techniques are further modified by the frequency domain space curve fitting method

Keywords： output-only response； identification of system mode parameters； space curve fitting； spectrum overlapping    

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Development of a seismic design method based on response spectra for building structures

ZHOU Xiyuan, YU Ruifang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2,   Pages 129-141 doi: 10.1007/s11709-007-0014-2

Abstract: The assumption and problem of the mode-superposition response spectrum method in seismic design codeThe progresses on the mode superposition response spectrum theory are discussed.This includes: 1) the complex mode superposition method (in real form) for the non-classically dampedexcitations and deducing corresponding method; 4) the approach for calculation of seismic response ofthe non-classically damped system with overcritical damping and the calculation method of seismic response

Keywords： generalization     classical damping     mode-superposition response     calculation formula     damping theory    

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Variational mode decomposition based modal parameter identification in civil engineering

Mingjie ZHANG, Fuyou XU

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 5,   Pages 1082-1094 doi: 10.1007/s11709-019-0537-3

Abstract: An out-put only modal parameter identification method based on variational mode decomposition (VMD) isThe recently developed VMD technique is utilized to decompose the free decay response (FDR) of a structureThe proposed identification method can straightforwardly extract the mode shape vectors using the modalThe results of the present method are compared with those of the empirical mode decomposition-based method, and the superiorities of the present method are verified.

Keywords： modal parameter identification     variational mode decomposition     civil structure     nonlinear system     closely    

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Mass loss and nutrient dynamics during litter decomposition in response to warming and nitrogen addition

Haiyan REN, Jie QIN, Baolong YAN, Alata, Baoyinhexige, Guodong HAN

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 1,   Pages 64-70 doi: 10.15302/J-FASE-2017194

Abstract: Plant litter decomposition has been studied extensively in the context of both warming and increasedHowever, the temporal patterns of mass loss and nutrient release in response to warming and nitrogenA 2-year decomposition experiment aimed to examine the effects of warming and nitrogen addition on decompositionThe effects of warming and nitrogen addition on decomposition of litter of , a dominant species in aaddition on mass loss, nitrogen and phosphorus concentrations of litter were also found during the decomposition

Keywords： climate warming     grassland     litter decomposition     nitrogen deposition     nutrient release    

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The Constructions of Cryptographic Functions

Teng Jihong,Zhang Wenying,Liu Wenfen,Li Shiqu

Strategic Study of CAE 2003, Volume 5, Issue 7,   Pages 47-52

Abstract:

This paper investigates a decomposition formula of Walsh spectrum for a class of Boolean functions

Keywords： Walsh spectrum     decomposition formula of Walsh spectrum     Bent function     resilient function     strict avalanche    

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A novel light fluctuation spectrum method for in-line particle sizing

Shouxuan QIN, Xiaoshu CAI, Li MA

Frontiers in Energy 2012, Volume 6, Issue 1,   Pages 89-97 doi: 10.1007/s11708-012-0176-z

Abstract: This paper discusses two problems in in-line particle sizing when using light fluctuation method.Secondly, by combining spectrum analysis with Gregory’s theory, a multi-sub-size zone model is proposed

Keywords： in-line measurement     particle size distribution (PSD)     incident light intensity     particle concentration     light fluctuation    

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3D mode discrete element method with the elastoplastic model

Wei HU, Feng JIN, Chong ZHANG, Jinting WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1,   Pages 57-68 doi: 10.1007/s11709-012-0139-9

Abstract: The three-dimensional mode-deformable discrete element method (3MDEM) is an extended distinct element

Keywords： mode discrete element method     elastoplastic     numerical method     discontinuum     contact    

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Exponential response electrical pole-changing method for a five-phase induction machine with a currentsliding mode control strategy Article

Jia-qiang YANG, Rong-sen YIN, Xiao-jun ZHANG, Jin HUANG

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 8,   Pages 1151-1166 doi: 10.1631/FITEE.1601728

Abstract: To reduce the torque ripple and speed fluctuation of the machine, we investigate an exponential responseelectrical pole-changing method for five-phase IM with a current sliding-mode control strategy.Current sliding-mode controllers are applied instead of conventional proportional integral (PI) controllersto adjust the current vectors, and exponential current response achieves a smooth transition betweenCompared with the step response pole-changing with PI control method, the proposed pole-changing method

Keywords： Five-phase induction machine     Pole-change     Sliding-mode control     Exponential response     Torque ripple    

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Variation characteristics of atmospheric methane and carbon dioxide in summertime at a coastal site in the South China Sea

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 11, doi: 10.1007/s11783-022-1574-z

Abstract:

● Diurnal patterns of CH4 and CO2 are clearly extracted using EEMD.

Keywords： Methane     Carbon dioxide     Diurnal pattern     Ensemble empirical mode decomposition     South China Sea     Sea    

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Evaluation of site response characteristic using nonlinear method (Case study: Babol, Iran)

Asskar Janalizadeh CHOOBBASTI, Sadegh REZAEI, Farzad FARROKHZAD, Pedram Haidarzaeh AZAR

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 1,   Pages 69-82 doi: 10.1007/s11709-014-0231-4

Abstract: Finally the obtained response spectra from fully nonlinear method were compared with site response spectra

Keywords： fully nonlinear method     site effect     dynamic analysis     response spectra    

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A novel hybrid model for water quality prediction based on VMD and IGOA optimized for LSTM

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 7, doi: 10.1007/s11783-023-1688-y

Abstract:

● A novel VMD-IGOA-LSTM model has proposed for the prediction of water quality.

Keywords： Water quality prediction     Grasshopper optimization algorithm     Variational mode decomposition     Long short-term    

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End-of-pipe or process-integrated: evidence from LMDI decomposition of China’s SO

Pingdan ZHANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 6,   Pages 867-874 doi: 10.1007/s11783-013-0541-0

Abstract: source prevention, process control and end-of-pipe treatment, using the Logarithmic Mean Divisia Index method

Keywords： end-of-pipe     process-integrated     Logarithmic Mean Divisia Index method (LMDI)     environmental regulation    

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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

Abstract:

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    

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Title Author Date Type Operation

Optimization design of anti-seismic engineering measures for intake tower based on non-dominated sorting genetic algorithm-II

Journal Article

Relative vibration identification of cutter and workpiece based on improved bidimensional empirical modedecomposition

Jiasheng LI, Xingzhan LI, Wei WEI, Pinkuan LIU

Journal Article

Identification of system mode parameters using response measurement only

Huo Bingyong and Yi Weijian

Journal Article

Development of a seismic design method based on response spectra for building structures

ZHOU Xiyuan, YU Ruifang

Journal Article

Variational mode decomposition based modal parameter identification in civil engineering

Mingjie ZHANG, Fuyou XU

Journal Article

Mass loss and nutrient dynamics during litter decomposition in response to warming and nitrogen addition

Haiyan REN, Jie QIN, Baolong YAN, Alata, Baoyinhexige, Guodong HAN

Journal Article

The Constructions of Cryptographic Functions

Teng Jihong,Zhang Wenying,Liu Wenfen,Li Shiqu

Journal Article

A novel light fluctuation spectrum method for in-line particle sizing

Shouxuan QIN, Xiaoshu CAI, Li MA

Journal Article

3D mode discrete element method with the elastoplastic model

Wei HU, Feng JIN, Chong ZHANG, Jinting WANG

Journal Article

Exponential response electrical pole-changing method for a five-phase induction machine with a currentsliding mode control strategy

Jia-qiang YANG, Rong-sen YIN, Xiao-jun ZHANG, Jin HUANG

Journal Article

Variation characteristics of atmospheric methane and carbon dioxide in summertime at a coastal site in the South China Sea

Journal Article

Evaluation of site response characteristic using nonlinear method (Case study: Babol, Iran)

Asskar Janalizadeh CHOOBBASTI, Sadegh REZAEI, Farzad FARROKHZAD, Pedram Haidarzaeh AZAR

Journal Article

A novel hybrid model for water quality prediction based on VMD and IGOA optimized for LSTM

Journal Article

End-of-pipe or process-integrated: evidence from LMDI decomposition of China’s SO

Pingdan ZHANG

Journal Article

Variable-separating-based Space Decomposition Algorithm of Production Scheduling

Gao Yongchao,Li Qiqiang,Ding Ran,Guo Qingqiang

Journal Article