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A Variable-Parameter-Model-Based Feedforward Compensation Method for Tracking Control

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IEEE/CAA Journal of Automatica Sinica 2020年第3期7卷 693-701页

作者： Dailin Zhang zining Wang Masayoshi Tomizuka School of Mechanical Science and Engineering State Key Laboratory of Digital Manufacturing Equipment and TechnologyHuazhong University of Science and TechnologyWuhan 430074China Department of Mechanical Engineering University of California at BerkeleyBerkeley CA 94720 USA IEEE

Base on the accurate inverse of a system, the feedforward compensation method can compensate the tracking error of a linear system dramatically. However, many control systems have complex dynamics and their accurate inverses are difficult to obtain. In the paper, a variable parameter model is proposed to describe a system and a multi-step adaptive seeking approach is used to obtain its parameters in real time. Based on the proposed model, a variable-parameter-model-based feedforward compensation method is proposed, and a disturbance observer is used to overcome the influence of the model uncertainty. Theoretical analysis and simulation results show that the variable-parametermodel-based feedforward compensation method can obtain better performance than the traditional feedforward compensation.

关键词： Disturbance observer feedforward compensation iterative learning control parameter identification system model

Engineering the grain boundary:a promising strategy to configure NiCoP_(4)O_(12)/NiCoP nanowire arrays for ultra-stable supercapacitor

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Frontiers of Chemical Science and Engineering 2022年第8期16卷 1259-1267页

作者： Mengqi Cui zining Wang Yuanye Jiang Hui Wang State Key Laboratory Base for Eco-Chemical Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China Guangdong Provincial Key Laboratory for Electronic Functional Materials and Devices Huizhou UniversityHuizhou 516001China

NiCoP_(4)O_(12)/NiCoP nanorod-like arrays with tunable grain boundary density and pores were synthesized by the processes composed of hydrothermal and pyrolysis,in which,the electron structure of Ni and Co atoms characterized by X-ray photoelectron spectroscopy was contemporaneous inverse *** optimized NiCoP_(4)O_(12)/NiCoP arrays have a high specific capacitance of 507.8μAh∙cm^(–2)at 1 mA∙cm^(–2),and good rate ability of 64.7%retention at 30-folds increased current ***,an ultra-stable ability,88.5%of retention after 10000 cycles,was achieved in an asymmetric cell assembled of the NiCoP_(4)O_(12)/NiCoP arrays with activated *** addition,the energy and power densities of an asymmetric cell were higher than those of other work,demonstrating as-prepared NiCoP_(4)O_(12)/NiCoP arrays are promising electrodes for supercapacitors.

关键词： NiCo array electrode grain boundary stability supercapacitor

Numerical simulation of solitary and random wave propagation through vegetation based on VOF method

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Acta Oceanologica Sinica 2013年第7期32卷 38-46页

作者： ZHANG Mingliang HAO zining ZHANG Yunpeng WU Weiming School of Ocean and Environment Engineering Dalian Ocean University National Center for Computational Hydroscience and Engineering University of MississippiUniversity

A vertical two-dimensional numerical model has been applied to solving the Reynolds Averaged Navier- Stokes （RANS} equations in the simulation of current and wave propagation through vegetated and non- vegetated waters. The k-e model is used for turbulence closure of RANS equations. The effect of vegeta- tion is simulated by adding the drag force of vegetation in the flow momentum equations and turbulence model. To solve the modified N-S equations, the finite difference method is used with the staggered grid system to solver equations. The Youngs＇ fractional volume of fluid （VOF） is applied tracking the free sur- face with second-order accuracy. The model has been tested by simulating dam break wave, pure current with vegetation, solitary wave runup on vegetated and non-vegetated channel, regular and random waves over a vegetated field. The model reasonably well reproduces these experimental observations, the model- ing approach presented herein should be useful in simulating nearshore processes in coastal domains with vegetation effects.

关键词： VOF method vegetation solitary regular and random waves wave height attenuation k-emodel

Multi-objective robust secure beamforming for cognitive satellite and UAV networks

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Journal of Systems Engineering and Electronics 2021年第4期32卷 789-798页

作者： WANG zining LIN Min TANG Xiaogang GUO Kefeng HUANG Shuo CHENG Ming School of Telecommunications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China School of Space Information Space Engineering UniversityBeijing 101407China Shanghai Aerospace Electronic Technology Institute Shanghai 201109China

A multi-objective optimization based robust beamforming(BF)scheme is proposed to realize secure transmission in a cognitive satellite and unmanned aerial vehicle(UAV)*** the satellite network coexists with the UAV network,we first consider both achievable secrecy rate maximization and total transmit power minimization,and formulate a multi-objective optimization problem(MOOP)using the weighted Tchebycheff ***,by supposing that only imperfect channel state information based on the angular information is available,we propose a method combining angular discretization with Taylor approximation to transform the non-convex objective function and constraints to the convex ***,we adopt semi-definite programming together with randomization technology to solve the original MOOP and obtain the BF weight ***,simulation results illustrate that the Pareto optimal trade-off can be achieved,and the superiority of our proposed scheme is confirmed by comparing with the existing BF schemes.

关键词： cognitive satellite and unmanned aerial vehicle network(CSUN) multi-objective optimization robust secure beamforming(BF) weighted Tchebycheff approach

Recent advances and trends of heterogeneous electro-Fenton process for wastewater treatment-review

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Chinese Chemical Letters 2022年第2期33卷 653-662页

作者： zining Wang Mingyue Liu Fan Xiao Georgeta Postole Hongying Zhao Guohua Zhao School of Chemical Science and Engineering and Shanghai Key lab of Chemical Assessment and SustainabilityTongji UniversityShanghai 200092China Univ Lyon UniversitéClaude Bernard Lyon 1CNRSIRCELYONF-69626 VilleurbanneFrance

Electrochemical advanced oxidation processes (EAOPs) are effective and environmentally friendly for the treatment of refractory organic *** EAOPs,heterogeneous electro-Fenton (EF) process with in-situ formation of hydrogen peroxide (H_(2)O_(2)) is an eco-friendly,cost-effective and easy-operable technology to generate hydroxyl radicals (;OH) with high redox *** generation of;OH is determined by the synergistic H_(2)O_(2)formation and *** surface catalytic mechanisms for H_(2)O_(2)activation in the heterogeneous EF process were *** required features such as heteroatom doping and oxygen groups for H_(2)O_(2)formation via selective two-electron oxygen reduction reaction (ORR) with carbonaceous electrode are *** solid Fenton catalysts and integrated functional cathodes that widely used in heterogeneous EF for wastewater treatment are grouped into few *** the brief discussion on catalytic activity and stability of materials over different experimental conditions are *** addition,the application of heterogeneous EF process on the remediation of emerging contaminants is *** challenges and future prospects of the heterogeneous EF processes about catalytic fall-off and multi-step/complex techniques for water purification are emphasized.

关键词： Heterogeneous electro-Fenton Oxygen reduction reaction Hydrogen peroxide Cathodic materials Refractory organic pollutants

Robust beamforming for IRS-aided SWIPT in cognitive radio networks

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Digital Communications and Networks 2023年第3期9卷 645-654页

作者： zining Wang Min Lin Shupei Huang Ming Cheng Wei-Ping Zhu Yan Guo College of Telecommunications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing210003China Department of Electrical and Computer Engineering Concordia UniversityMontrealQCH3G 1M8Canada

Intelligent reflecting surface(IRS)is widely recognized as a promising technique to enhance the system perfor-mance,and thus is a hot research topic in future wireless *** this context,this paper proposes a robust BF scheme to improve the spectrum and energy harvesting efficiencies for the IRS-aided simultaneous wireless information and power transfer(SWIPT)in a cognitive radio network(CRN).Here,the base station(BS)utilizes spectrum assigned to the primary users(PUs)to simultaneously serve multiple energy receivers(ERs)and information receivers(IRs)through IRS-aided multicast *** particular,by assuming that only the imperfect channel state information(CSI)is available,we first formulate a constrained problem to maximize the minimal achievable rate of IRs,while satisfying the harvesting energy threshold of ERs,the quality-of-service requirement of IRs,the interference threshold of PUs and transmit power budget of *** address the non-convex problem,we then adopt triangle inequality to deal with the channel uncertainty,and propose a low-complexity algorithm combining alternating direction method of multipliers(ADMM)with alternating optimi-zation(AO)to jointly optimize the active and passive beamformers for the BS and IRS,***,our simulation results confirm the effectiveness of the proposed BF scheme and also provide useful insights into the importance of introducing IRS into the CRN with SWIPT.

关键词： Cognitive radio networks Intelligent reflecting surface Simultaneous wireless information and power transfer Robust beamforming

Exploring the mechanism of hirudin in the treatment of diabetic kidney disease using network pharmacology combined with molecular docking verification

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Journal of Traditional Chinese Medicine 2022年第4期42卷 586-594页

作者： PANG Xinxin ZHU Qing PENG zining ZHANG Yage SHI Xiujie HAN Jiarui Department of Nephropathy Henan Provincial Hospital of Traditional Chinese MedicineZhengzhou 450002China

OBJECTIVE:To explore the mechanism of hirudin in the treatment of diabetic kidney disease(DKD).METHOD:Cytoscape software was used to analyze the network between hirudin targets and active components in the treatment of *** biological function and mechanism of effective targets of hirudin for DKD treatment were analyzed by the Database for Annotation,Visualization and Integrated Discovery(DAVID)*** docking technology was used to simulate the docking of key targets,and the DKD rat model was used to verify the first 4 key targets with high"Hydrogen number"among the top 10 targets verified by molecular ***:Total of 12334 DKD targets were screened in Gene Cards,OMIM and other databases,Hirudin and DKD had 247 common target genes,and the protein interaction network got 2115 *** DAVID database was used for the Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analysis,confirming that hirudin in treatment of DKD involves multiple signaling pathways such as the forkhead box O signaling pathway,the phosphatidylinositol 3-kinase-protein kinase B signaling pathway,the vascular endothelial-derived growth factor signaling pathway and other signaling *** top ten key targets of hirudin in treatment of DKD were verified by molecular *** experiments showed that hirudin could decrease the expression of caspase-3 in renal tissue of DKD rats,and increase the expression of RAC-alpha serine/threonineprotein kinase,Catalase,and Heat shock protein HSP 90-alpha in renal tissue of DKD ***:This study preliminarily reveals that hirudin treats DKD through multiple targets and pathways,and molecular docking and animal experiments indicates the feasibility of this *** may be directly or indirectly involved in the regulation of cell metabolism,oxidative stress and other mechanisms in the treatment of DKD,which will lay the foundation for future molecular biological experiments of hirudin in the treatme

关键词： hirudins diabetic kidney disease network pharmacology molecular docking simulation

Simulation and experimental research of digital valve control servo system based on CMAC-PID control method

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High Technology Letters 2017年第3期23卷 306-314页

作者：赵劲松 Zhao zining Wang Zhipeng Zhang Chuanbi Yao Jing Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Qinhuangdao 066004 P. R. China Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University) Ministry of Education of China Qinhuangdao 066004 P. R. China School of Mechanical Engineering Yanshan University Qinhuangdao 066004 P. R. China

Digital valve control servo system is studied in this paper. In order to solve the system problems of poor control precision and slow response time,a CMAC-PID( cerebellar model articulation controller-PID) compound control method is proposed. This compound controller consists of two components: one is a traditional PID for the feedback control to guarantee stability of the system; the other is the CMAC control algorithm to form a feed-forward control for achieving high control precision and short response time of the controlled plant. Then the CMAC-PID compound control method is used in the digital valve control servo system to improve its control performance. Through simulation and experiment,the proposed CMAC-PID compound control method is superior to the traditional PID control for enhancing stability and robustness,and thus this compound control can be used as a new control strategy for the digital valve control servo system.

关键词： electro-servo system digital hydraulic digital valve CMAC-PID compound control rapid control prototyping technology

Influence on physical properties and digestive characters of fermented coconut milk with different loading proportion of skimmed coconut drink using Lactiplantibacillus plantarum MWLp-4 from human milk mixing with commercial bacteria

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Food Bioscience 2023年第3期53卷 1147-1158页

作者： Qing Zhao zining Wang Zengxin Yu Zhongyang Gao Guangqing Mu Xiaomeng Wu School of Food Science and Technology Dalian Polytechnic UniversityLiaoning116000China

Coconut drink as a milk substitute has been paid attention to as plant-based raw material on offering *** content could affect on properties of fermented *** study was to investigate the influence of different fat content of fermented coconut milk(coconut drink mixing with skimmed milk power)on textural and digestive ***,we selected the strain of Lactiplantibacillus plantarum MWLp-4 from human milk mixing with commercial bacteria to obtain a fermented coconut milk with great ***,fermented coconut milk produced with the proportion of skimmed and full fat coconut drink of 3:2 displayed a better viscosity,but with the ratio of 2:3 showed high values on textural ***,the fermented coconut milk with MWLp-4 addition obtained a better textural and digestive properties than coconut milk fermented only using commercial ***,this study concluded that more acceptable fermented coconut milk could be produced from the proportion of skimmed and full fat coconut drink of 3:2 or 2:3,and the MWLp-4 strain will be a potential probiotic to reduce the content of gelling agents,thickeners or stabilizers addition.

关键词： Fermented coconut milk Digestive properties Lactiplantibacillus plantarum