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Improved parameter identification algorithm for ship model based on nonlinear innovation decorated by sigmoid function

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Transportation Safety and Environment 2021年第2期3卷 114-122页

作者： Xianku Zhang baigang Zhao Guoqing Zhang Navigation College Dalian Maritime UniversityDalian 116026China

This paper investigates the problem of parameter identification for ship nonlinear Nomoto model with small test data,a nonlinear innovation-based identification algorithm is presented by embedding sigmoid function in the stochastic gradient *** demonstrate the validity of the algorithm,an identification test is carried out on the ship‘SWAN’with only 26 sets of test ***,the identification effects of the least squares algorithm,original stochastic gradient algorithm and the improved stochastic gradient algorithm based on nonlinear innovation are ***,the stochastic gradient algorithm is not suitable for the condition of small test *** simulation results indicate that the improved stochastic gradient algorithm with sigmoid function greatly increases its accuracy of parameter identification and has 14.2%up compared with the least squares *** the effectiveness of the algorithm is verified by another identification test on the ship‘Galaxy’,the accuracy of parameter identification can reach more than 95%which can be used in ship motion simulation and controller *** proposed algorithm has advantages of the small test data,fast speed and high accuracy of identification,which can be extended to other parameter identification systems with less sample data.

关键词： ship model parameter identification nonlinear innovation sigmoid function stochastic gradient

Experiment of gas plasma plume deflection by magnetic control

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航空动力学报 2020年第3期35卷 581-588页

作者： ZHAO Kai HU Jianbo LU Yongji LI Feng MING Ming SUN baigang School of Energy and Power Engineering Beijing University of Aeronautics and AstronauticsBeijing 100191China School of Aviation Operations and Services Aviation University of Air ForceChangchun Jilin 130022China Department of Contract Tactics Air Force Command CollegeBeijing 100097China

To investigate the deflection effect of gas plasma plume controlled by magnetic field,a novel experimental scheme was *** Cs2CO3 catalytic ionization seeds were injected into the combustion chamber to obtain gas plasma on a high temperature magneto hydrodynamic(MHD)experiment *** plasma jet was deflected under the action of an external magnetic field,resulting in a thrust-vector *** image velocimetry(PIV)collected two-dimensional images of jet flow *** image processing and velocity vector analysis,the jet deflection angle can be obtained *** 1800-2500 K,the jet deflection was verified experimentally under the condition of 0.45 T magnetic field *** results indicate that the jet deflection angle increases gradually with the increase of gas temperature,and above 2200 K,the jet deflection angle increase *** the process of gas plasma jet,it is feasible to realize the jet deflection controlled by MHD by adding an external magnetic field.

关键词： gas plasma plume deflection magnetic fluid thrust vector particle image velocimetry

Destruction of 4-phenolsulfonic acid in water by anodic contact glow discharge electrolysis

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Journal of Environmental Sciences 2013年第6期25卷 1063-1070页

作者： Haiming Yang baigang An Shaoyan Wang Lixiang Li Wenjie Jin Lihua Li School of Chemical Engineering University of Science and Technology Liaoning

Destruction of 4-phenolsulfonic acid （4-PSA） in water was carded out using anodic contact glow discharge electrolysis. Accompanying the decay of 4-PSA, the amount of total organic carbon （TOC） in water correspondingly decreased, while the sulfonate group of 4- PSA was released as sulfate ion. Oxalate and formate were obtained as minor by-products. Additionally, phenol, 1,4-hydroquinone, hydroxyquinol and 1,4-benzoquinone were detected as primary intermediates in the initial stages of decomposition of 4-PSA. A reaction pathway involving successive attacks of hydroxyl and hydrogen radicals was assumed on the basis of the observed products and kinetics. It was revealed that the decay of both 4-PSA and TOC obeyed a first-order rate law. The effects of different Fe ions and initial concentrations of 4-PSA on the degradation rate were investigated. It was found that the presence of Fe ions could increase the degradation rate of 4-PSA, while initial concentrations lower than 80 mmol/L had no significant effect on kinetic behaviour. The disappearance rate of 4-PSA was significantly affected by pH.

关键词： 4-phenolsulfonic acid destruction contact glow discharge electrolysis first-order rate law Fenton reaction

Development of performance and combustion system of Atkinson cycle internal combustion engine

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Science China(Technological Sciences) 2014年第3期57卷 471-479页

作者： LIU FuShui SUN baigang ZHU HuaRong HU TieGang DU Wei LI XiangRong ZHANG Zheng School of Mechanical Engineering Beijing Institute of Technology Chang'an Auto Co. Ltd

The application of hybrid vehicle is a practical technical solution to the energy shortage and the environmental *** internal combustion engine(ICE)plays a key role in the development of the hybrid *** on the requirements of the hybrid vehicle and the characteristic of Atkinson cycle,a set of designing methods for the Atkinson cycle gasoline engine is presented through the analysis of the optimized matching for the compression ratio,valve timing and the combustion *** designing method has been verified by the bench test and the results show that the fuel consumption can be improved by12%–15%with the reduction of the low speed torque by 10%,and the low fuel consumption region in the fuel map extends significantly with the rated power almost keeping *** may be of great reference for the development of hybrid vehicle technology in China.

关键词： hybrid vehicle Atkinson cycle compression ratio valve timing combustion chamber

Synthesis of an ordered porous carbon with the dual nitrogen-doped interfaces and its ORR catalysis performance

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Chinese Chemical Letters 2021年第1期32卷 140-145页

作者： Hongwei Zhao Yanqiu Zhang Li Lixiang Xin Geng Haiming Yang Weimin Zhou Chengguo Sun baigang An School of Chemical Engineering University of Science and Technology LiaoningAnshan 114051China Key Laboratory of Energy Materials and Electrochemistry Research Liaoning Province Anshan 114051China

Both nitrogen-doping feature and pore structure are critical factors for developing nitrogen-doped carbons based catalysts with a high performance toward oxygen reduction reaction(ORR).Herein,a simple one-step CVD of acetylene and acetonitrile vapor method using silanized SBA-15 as a template has been developed to synthesize an ordered porous carbon(OPC) with dual nitrogen-doped *** optimized sample as prepared with the CVD of 4 h at 750℃ contains two types of ordered mesopores that one type is the ordered cylindrical pores inheriting from the pores of SBA-15 and has a pore width of4.0~5.0 nm,the other type is the ordered quasi-hexagonal pores with a width of 3.0~4.0 nm produced by etching the pore walls of *** two types of pores whose pore walls are built by the nitrogen doped carbon layers resulted by the CVD and thus it actually makes the dual nitrogen-doped interfaced OPC(DN-OPC).Meanwhile,DN-OPC contains a few of micropores and a large SSA of 1430 m~2/*** dualordered pores and dual nitrogen-doped interfaces cannot only facilitate mass transport but also utilize the active sites of DN-OPC for ***,as metal-free ORR catalyst,DN-OPC exhibits a good activity close to commercial Pt/C catalyst,and an excellent durability and methanol tolerance.

关键词： Silanized SBA-15 Nitrogen-doped Dual-ordered pores CVD of acetonitrile Oxygen reduction reaction

Production scheduling optimization method for textile machinery manufacturing enterprise based on improved bee algorithm 36

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Production scheduling optimization method for textile machin...

A strategy based on water soluble coal tar pitches to construct MnO_(2)@C composite materials with high electrochemical performance

第36届中国控制会议

作者： LI Xixing Du baigang GUO Shunsheng XU Renhe School of Mechanical Engineering Hubei University of Technology School of Mechanical and Electronic Engineering Wuhan University of Technology

ISBN: (纸本)9781538629185

Production scheduling is the key one of the basic means of production management, and the production scheduling optimization is one of the core technologies of modern management technology. According to the characteristics of quick response and order driven of production in textile machinery manufacturing enterprise, an optimal production scheduling mode is proposed which is based on improved bee algorithm. It enhances the diversity of the initial population by improving the quality of initial population and introducing the "cataclysm" operator which can avoid the precocious problem of algorithm. For some dynamic events in the actual production management of textile machinery manufacturing enterprise, a case study has been carried out, and the results show that the proposed approach is more preferably in solving the problem of workshop scheduling by comparing with the traditional bee algorithm.

关键词： Improved bee algorithm production scheduling optimization textile machinery manufacturing

来源： cnki会议评论

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Science China(Technological Sciences) 2024年第1期67卷 311-320页

作者： LIU Bo WANG Kun GUO ZhaoQi HAN BeiBei XU GuiYing JU DongYing an baigang LI YongCheng NI ZhenYong ZHOU WeiMin Key Laboratory of Energy Materials and Electrochemistry Research Liaoning Province University of Science and Technology LiaoningAnshan 114051China Advanced Science Research Laboratory Saitama Institute of TechnologyFusaiji 1690Japan Liaoning Starry Sky Sodium Battery Co. Ltd.Anshan 114051China Sinosteel Anshan Research Institute of Thermo-Energy Co. Ltd.Anshan 114051China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine ChemistrySchool of Chemical Engineering and TechnologyHainan UniversityHaikou 570228China Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China

The water soluble coal tar pitches(WS-CTPs)were successfully prepared and used to construct the MnO_(2)@C composite materials by a hydrothermal *** is interestingly observed that the structures and morphologies of MnO_(2)@C materials can be controlled by controlling the dosages of WS-CTPs and ***,it is aware that MnO_(2)exists in the MnO_(2)@C materials in an amorphous *** with MnO_(2),MnO_(2)@C materials output a remarkable improvement in electrochemical *** instance,MnO_(2)@C-0.3 shows the storage capacity at 965.7 mA h g^(−1)after 300 cycles at a current density of 0.1 A g^(−1).In addition,after 600 cycles at a current density of 1.0 A g^(−1),the storage capacity of MnO_(2)@C-0.3 still keeps 450.3 mA h g^(−1),indicating that MnO_(2)@C-0.3 owns tremendous cycle stability at a high current *** view of the fact that the coal tar pitches possess great cost advantages,the strategy of using WS-CTPs as a carbon source to cover the metal oxides is a competitive way to expand the application of metal oxides in the fabrication of electrodes of LIBs.

关键词： water soluble coal tar pitches MnO_(2) composite materials lithium ion batteries(LIBs) energy storage systems(ESSs) coal tar pitches

Numerical and experimental investigation of plasma plume deflection with MHD flow control

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Plasma Science and Technology 2018年第6期20卷 152-160页

作者： Kai ZHAO Feng LI baigang SUN Hongyu YANG Tao ZHOU Ruizhi SUN School of Energy and Power Engineering Beihang University Beijing 100191 People's Republic of China School of Aviation Operations and Services Aviation University of Air Force Changchun 130022 People's Republic of China Air Force Command College Beijing 100191 People's Republic of China

This paper presents a composite magneto hydrodynamics（MHD） method to control the lowtemperature micro-ionized plasma flow generated by injecting alkali salt into the combustion gas to realize the thrust vector of an *** principle of plasma flow with MHD control is *** feasibility of plasma jet deflection is investigated using numerical simulation with MHD control by loading the User-Defined Function model.A test rig with plasma flow controlled by MHD is *** alkali salt compound with a low ionization energy is injected into combustion gas to obtain the low-temperature plasma ***,plasma plume deflection is obtained in different working *** results demonstrate that plasma plume deflection with MHD control can be realized via numerical simulation.A low-temperature plasma flow can be obtained by injecting an alkali metal salt compound with low ionization energy into a combustion gas at 1800–2500 *** vector angle of plasma plume deflection increases with the increase of gas temperature and the magnetic field *** is feasible to realize the aim of the thrust vector of aeroengine by using MHD to control plasma flow deflection.

关键词： MHD plasma ionization degree thrust vector aero engine

Is sodium percarbonate a good deltamethrin choice in situ remediation of pollution？

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Frontiers of Environmental Science & Engineering 2017年第3期11卷 45-52页

作者： Xu Zhang baigang Ren Shangge Li Xiaodi Qu Huanhuan Yang Shiguo Xu Zongming Ren Qiang Kong Cheng Wang 1 Institute of Environment and Ecology Shandong Normal University Jinan 250014 China School of Environmental Science and Engineering Shandong University Jinan 250100 China School of Life Science Shandong University Jinan 250100 China Management College Ocean University of China Qingdao 266100 China

In this research, the toxic effects of deltamethrin （DM） on the behavior responses of Zebra fish （Damo rerio） in the characteristic of behavior strength were investigated followed by an assessment of an in situ remediation of the DM pollution using sodium percarbonate. Behavior strength ofDanio rerio was approximately 0.83 in the control group and was slightly higher than 0.83 in the sublethal treatment （0.1 TU （toxic unit））, which suggested that sublethal DM exposure could induce a stimulation effect in 48 h of exposure. In lower DM concentration treatments （0.5 and 1.0 TU）, behavior strength could be inhibited significantly. Behavior responses of Danio rerio showed a gradually increased tendency when they were exposed to higher concentration of DM, and the declining amplitudes of behavior strength changed with the increase of DM concentrations. These results suggested that DM had evident acute toxicity effects on the behavior responses of Danio rerio with a good dose-effect relationship. The in situ remediation of the DM pollution using sodium percarhonate showed that the toxic effect of DM on behavior responses ofDanio rerio could be eliminated even in the highest concentration of DM （5.0 TU）. Meanwhile, the behavior response of Danio rerio in the treatment of sodium percarbonate was the same as in the control, which indicated that sodium percarbonate had no evident toxic effects on the behavior of Daniu rerio in the current concentration. This study suggested that adding sodium percarbonate in situ might be a good way to eliminate the DM toxic effects.

关键词： Behavior strength Sublethal treatment Detoxification Accidental pollution