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Effects of Electron Donor and Different Solvents on Polarizability and Second Hyperpolarizability of Diradical Complex Involving X(X=B,Al,Ga)

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Chemical Research in Chinese Universities 2012年第2期28卷 308-312页

作者： liu Hai-bo QIU Yong-qing YANG Guo-chun liu chun-guang SUN Shi-ling Institute of Functional Material Chemistry Faculty of ChemistryNortheast Normal UniversityChangchun 130024P.R.China

The polarizability（α） and second hyperpolarizability（γ） were systemically investigated for singlet diradical complex involving X（X=B,Al,Ga） *** results show that both the α and γ can be effectively tuned by varying the distance R（between compound A and a water molecule） and acceptor atom *** lone pair of electrons from the O atom of the water molecule entered into the vacant p orbital of atom X,which increased the diradical character and led to the increase of the α and γ ***,the polarizable continuum model（PCM） was used to test the effects of H2O and CCl4 solvents on the α and γ *** the α and γ values of the studied diradical complex 1a（1b,1c） in H2O and CCl4 were uniformly *** the solvent effects of H2O on either α or γ were larger than those of CCl4.

关键词： Polarizability Second hyperpolarizability Diradical character Polarizable continuum model(PCM)

Multiobjective Imperialist Competitive Algorithm for Solving Nonlinear Constrained Optimization Problems

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Journal of Systems Science and Information 2019年第6期10卷 532-549页

作者： chun-an liu Huamin JIA School of Mathematics and Information Science Baoji University of Arts and Sciences Baoji 721013China School of Engineering Cranfield University England MK43 0AL UK

Nonlinear constrained optimization problem(NCOP) has been arisen in a diverse range of sciences such as portfolio, economic management, airspace engineering and intelligence system *** this paper, a new multiobjective imperialist competitive algorithm for solving NCOP is ***, we review some existing excellent algorithms for solving NOCP;then, the nonlinear constrained optimization problem is transformed into a biobjective optimization problem. Second, in order to improve the diversity of evolution country swarm, and help the evolution country swarm to approach or land into the feasible region of the search space, three kinds of different methods of colony moving toward their relevant imperialist are given. Thirdly, the new operator for exchanging position of the imperialist and colony is given similar as a recombination operator in genetic algorithm to enrich the exploration and exploitation abilities of the proposed algorithm. Fourth, a local search method is also presented in order to accelerate the convergence speed. At last, the new approach is tested on thirteen well-known NP-hard nonlinear constrained optimization functions, and the experiment evidences suggest that the proposed method is robust, efficient, and generic when solving nonlinear constrained optimization problem. Compared with some other state-of-the-art algorithms, the proposed algorithm has remarkable advantages in terms of the best, mean, and worst objective function value and the standard deviations.

关键词： multiobjective optimization imperialist competitive algorithm constrained optimization local search

Electroplating titanium film on 316L stainless steel in LiCl–KCl–Ti^x+(2

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Nuclear Science and Techniques 2020年第5期31卷 18-26页

作者： Jun-Xia liu Jing-chun liu De-Wu Long Ke Zhan School of Material Science and Engineering University of Shanghai for Science and TechnologyShanghai 200093China Department of Molten Salt Chemistry and Engineering Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Interfacial Physics and Technology Chinese Academy of SciencesShanghai 201800China

To improve the anti-corrosion properties of 316 L stainless steel,titanium(Ti)metal films were electroplated on it using Li Cl–KCl molten salts as the electrolyte,and low-valence Tix+(2 详细信息

To improve the anti-corrosion properties of 316 L stainless steel,titanium(Ti)metal films were electroplated on it using Li Cl–KCl molten salts as the electrolyte,and low-valence Tix+(2

关键词： Molten salts Electro-plating Ti coating Anti-corrosion

Environmental effect of vegetation restoration on degraded ecosystem in low subtropical China

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Journal of Environmental Sciences 2003年第4期15卷 514-519页

作者： PENG Shao-lin YANG liu-chun LU Hong-fang South China Institute of Botany Chinese Academy of SciencesGuangzhou 510650China.

The environmental effect of degraded ecosystem's vegetation restoration in low subtropical China was studied. Results indicated that the vegetation recovery on degraded lands significantly ameliorates surrounding environment, increases species diversity, improves soil structure, raises soil fertility, enhances productivity, and promotes regional agricultural production and social economic development dramatically. Through the combining engineering and biological measures, the restoration of degraded ecosystem in low subtropical area is possible and economical. The restoration experience in Xiaoliang, Wuhua and other sites are valuable for other degraded subtropical area was introduced.

关键词： vegetation restoration degraded ecosystem low subtropical zone environment impact

Enhanced atrazine removal using membrane bioreactor bioaugmented with genetically engineered microorganism

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Frontiers of Environmental Science & Engineering 2008年第4期2卷 452-460页

作者： chun liu Xia HUANG State Key Joint Laboratory of Environmental Simulation and Pollution Control Department of Environmental Science and EngineeringTsinghua UniversityBeijing 100084China School of Environmental Science and Engineering Hebei University of Science and TechnologyShijiazhuang 050018China

Bioaugmentation with genetically engineered microorganisms(GEMs)in a membrane bioreactor(MBR)for enhanced removal of recalcitrant pollutants was *** atrazine-degrading genetically engineered microorganism(GEM)with green fluorescent protein was inoculated into an MBR and the effects of such a bioaugmentation strategy on atrazine removal were *** results show that atrazine removal was improved greatly in the bioaugmented MBR compared with a control *** a start-up period of 6 days,average 94.7%of atrazine was removed in bioaugmentedMBRwhen atrazine concentration of influent was 14.5 mg/*** volumetric removal rates increased linearly followed by atrazine loading increase and the maximum was 65.5 mg/(L?d).No negative effects were found on COD removal although carbon oxidation activity of bioaugmented sludge was lower than that of common *** inoculation,adsorption to sludge flocs was favorable for GEM *** GEM population size initially decreased shortly and then was kept constant at about 104–105 CFU/*** of micro-organisms played an important role in the decay of the GEM *** leakage from MBR was less than 102 CFU/mL initially and was then *** contrast,in a conventionally activated sludge bioreactor(CAS),sludge bulking occurred possibly due to atrazine exposure,resulting in bioaugmentation failure and serious GEM *** MBR was superior to CAS in atrazine bioaugmentation treatment using GEM.

关键词： genetically-engineered microorganism(GEM) membrane bioreactor(MBR) atrazine

Effects of different drying methods on quality,bacterial viability and storage stability of probiotic enriched apple snacks

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Journal of Integrative Agriculture 2018年第1期17卷 247-255页

作者： CUI Li NIU Li-ying LI Da-jing liu chun-quan liu Ying-ping liu chun-ju SONG Jiang-feng Institute of Farm Product Processing Jiangsu Academy of Agricultural Sciences College of Food Science and Engineering Yangzhou University

Effects of four different drying methods on the colour, texture, sensory quality, microstructure, bacterial viability and storage stability of probiotic-enriched apple snacks were assessed. The drying methods were air drying （AD）, freeze drying （FD）, freeze drying followed by microwave vacuum drying （FD＋MVD） and air drying followed by explosion puffing drying （AD＋EPD）. Overall, FD＋MVD can be used as a suitable drying method for the development of probiotic enriched apple snacks in consideration of colour, texture, sensory quality, bacterial viability and storage stability. Probiotic bacteria in FD＋MVD-dried samples remained above 1×106 CFU g 1 for 120 days at 25℃C. Interestingly, bacterial viability in FD＋MVD-dried samples turned out to be significantly higher than FD-dried samples during storage for 120 days.

关键词： drying apple snacks probiotic viability microwave vacuum

Distributed Fault-Tolerant Consensus Tracking of Multi-Agent Systems Under Cyber-Attacks

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IEEE/CAA Journal of Automatica Sinica 2022年第6期9卷 1037-1048页

作者： chun liu Bin Jiang Xiaofan Wang Huiliao Yang Shaorong Xie School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200444 School of Artificial Intelligence Shanghai UniversityShanghai 200444China IEEE College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China College of Energy and Electrical Engineering Hohai UniversityNanjing 210016China School of Computer Engineering and Science Shanghai UniversityShanghai 200444China

This paper investigates the distributed fault-tolerant consensus tracking problem of nonlinear multi-agent systems with general incipient and abrupt time-varying actuator faults under ***,a decentralized unknown input observer is established to estimate relative states and actuator ***,the estimated and output neighboring information is combined with distributed fault-tolerant consensus tracking *** of reaching leader-following exponential consensus tracking of multi-agent systems under both connectivity-maintained and connectivity-mixed attacks are derived with average dwelling time,attack frequency,and attack activation rate technique,*** example verifies the effectiveness of the fault-tolerant consensus tracking algorithm.

关键词： Cyberattacks fault-tolerant consensus tracking incipient and abrupt actuator faults nonlinear multi-agent systems unknown input observer

An Improved Virtual Inertia Algorithm of Virtual Synchronous Generator

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Journal of Modern Power Systems and Clean Energy 2020年第2期8卷 377-386页

作者： Haizhen Xu Changzhou Yu chun liu Qinglong Wang Xing Zhang the Department of Electronic Information and Electrical Engineering Hefei UniversityHefeiChina Anhui Provincial Engineering Laboratory of Renewable Energy and Industrial Energy Conservation Hefei University of TechnologyHefeiChina

Virtual synchronous generator(VSG)simulates the first-order motion equation of a synchronous generator(SG)with the *** can improve the system voltage and frequency support capabilities of a microgrid or a weak *** is now widely applied at a high penetration level of distributed generation(DG)***,because there is a contradiction between active power steady-state deviation of VSG and dynamic impact regulation,the VSG running in grid-connected mode with existing strategies cannot meet the steady and dynamic control ***,an improved virtual inertial control strategy of VSG is proposed in this *** active power impact is reduced effectively under the circumstance of damping coefficient Dωequal to 0 and a large inertia,thus the dynamic characteristic of active power is improved and its steady-state characteristic is ***,based on the analysis of the damping coefficient effect on the system dynamic process,two forms of improved virtual inertia algorithms are put forward by cascading a differential link into different positions of the first-order virtual inertia forward ***,by comparing the characteristics of the system with the two improved algorithms,the improved virtual inertial strategy based on differential compensation is proven to be better,and the design of its parameters is ***,simulation and experimental results verify the effectiveness of the proposed algorithm.

关键词： Virtual synchronous generator(VSG) virtual inertia microgrid distributed generation(DG)

Gas Exchange by Bubbles in Waves

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Chinese Physics Letters 1998年第3期15卷 198-199页

作者： ZHOU Xian-chu liu chun-rong LNM Laboratory Institute of MechanicsChinese Academy of SciencesBeijing 100080

A simple and feasible model for the calculation of the gas transfer by bubble clouds is proposed in this article.N_(2),O_(2),and CO_(2) transfered by bubble clouds are *** wind speed of 10m/s,the calculated supersatur... 详细信息

关键词： measurement bubble dissolved