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Molecular simulation study of the microstructures and properties of pyridinium ionic liquid[HPy][BF_(4)]mixed with acetonitrile

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原子与分子物理学报 2025年第4期42卷 27-32页

作者： XU Jian-Qiang MA Zhao-Peng CHENG Si liu zhi-Cong ZHU Guang-Lai Department of Physics School of Physics and Electronic InformationAnhui Normal UniversityWuhu 241002China

The microstructures and thermodynamic properties of mixed systems comprising pyridinium ionic liquid[HPy][BF_(4)]and acetonitrile at different mole fractions were studied using molecular dynamics simulation in this *** following properties were determined:density,self-diffusion coefficient,excess molar volume,and radial distribution *** results show that with an increase in the mole fraction of[HPy][BF_(4)],the self-diffusion coefficient ***,the excess molar volume initially decreases,reaches a minimum,and then *** rules of radial distribution functions(RDFs)of characteristic atoms are *** increasing the mole fraction of[HPy][BF_(4)],the first peak of the RDFs of HA1-F decreases,while that of CT6-CT6 rises at first and then *** indicates that the solvent molecules affect the polar and non-polar regions of[HPy][BF_(4)]differently.

关键词： Pyridinium ionic liquids Thermodynamic properties Molecular dynamics simulation Radial distribution functions

Biomimetic Cilia Based on MEMS Technology

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Journal of Bionic Engineering 2008年第4期5卷 358-365页

作者： zhi-guo Zhou zhi-wen liu Department of Electronic Engineering Beijing Institute of Technology Beijing 100081 P. R. China

A review on the research of Micro Electromechanical Systems （MEMS） technology based biomimetic cilia is presented. Biomimetic cilia, enabled by the advancement of MEMS technology, have been under dynamic development for the past decade. After a brief description of the background of cilia and MEMS technology, different biomimetic cilia applications are reviewed. Biomimetic cilia micro-actuators, including micromachined polyimide bimorph biomimetic cilia micro-actuator, electro-statically actuated polymer biomimetic cilia micro-actuator, and magnetically actuated nanorod array biomimetic cilia micro-actuator, are presented. Subsequently micromachined underwater flow biomimetic cilia micro-sensor is studied, followed by acoustic flow micro-sensor. The fabrication of these MEMS-based biomimetic cilia devices, characterization of their physical properties, and the results of their application experiments are discussed.

关键词： biomimetic cilia MEMS micro-actuator micro-sensor

Size focusing of colloidal quantum dots under high monomer concentration

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Nano Research 2022年第8期15卷 7622-7630页

作者： Huiyan liu zhi liu Chaodan Pu School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

The diffusion-controlled growth mode is widely used to narrow the size distribution of colloidal quantum ***,this growth mode always suffers from size broadening at the later growth *** monitoring the growth process of CdS colloidal quantum dots,we show the size broadening is a result of different growth rates of CdS colloidal quantum dots(CQDs)with different *** concentration-dependent growth experiments demonstrate the different growth rates are caused by the different ligand permeabilities of CdS *** cubic ones have lower ligand permeability but higher saturated surface reaction rate than the noncubic ones,leading to unexpected narrower size distribution under higher monomer *** efficient narrowing can be obtained by the addition of chloride ions,which can increase the ligand permeability of all CdS CQDs,as well as the opposite discrepancies in ligand permeability and surface reaction between cubic and noncubic CdS *** photoluminescence(PL)full width at half maximum(FWHM)of CdS CQDs can be narrowed down to below 80 meV for PL peaks from 430 to 500 *** the inevitable usage of the ligands in the solution synthesis of colloidal nanocrystals,the influence of morphology difference on growth rate should be *** results can provide an alternative solution to realize size focusing for the synthesis of colloidal nanocrystals.

关键词： CdS quantum dots surface reaction monomer diffusion ligand permeability

A Multiple q-translation Formula and Its Implications

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Acta Mathematica Sinica,English Series 2023年第12期39卷 2338-2363页

作者： zhi Guo liu School of Mathematical Sciences Key Laboratory of MEA(Ministry of Education)&Shanghai Key Laboratory of PMMPEast China Normal UniversityShanghai 200241P.R.China

Using Hartogs'fundamental theorem for analytic functions in several complex variables,we establish a multiple q-exponential differential operational identity for the analytic functions in several variables,which can be regarded as a multiple q-translation *** multiple q-translation formula is a fundamental result and play a pivotal role in *** this q-translation formula,we can easily recover many classical conclusions in q-mathematics and derive some new *** work reveals some profound connections between the theory of complex functions in several variables and q-mathematics.

关键词： q-series q-beta integral q-exponential differential operator q-translation Rogers-Szego polynomials

Temperature Responsive 3D Structure of Rod-like Bionanoparticles Induced by Depletion Interaction

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Chinese Journal of Polymer Science 2014年第10期32卷 1271-1271,1272-1275页

作者： zhi liu 牛忠伟 National Research Centre of Engineering Plastics Technical Institute of Physics and ChemistryChinese Academy of Sciences University of Chinese Academy of Sciences

Herein, we show that rod-like tobacco mosaic virus （TMV） can self-assemble into 3D bundled structures in aqueous solution using azobenzene modified Pluronics F127 block copolymers （Azo-F127） to induce depletion. The structures are characterized by both transmission electron microscopy and dynamic light scattering. The self-assembly process can be controlled reversibly by temperature. The formation of Azo-F127 hard spheres during the self-assembly is the main cause of this phenomenon.

关键词： Tobacco mosaic virus Pluronics Depletion interaction Self-assembly.

Fuzzy adaptive tracking control within the full envelope for an unmanned aerial vehicle

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Chinese Journal of Aeronautics 2014年第5期27卷 1273-1287页

作者： liu zhi Wang Yong Department of Automation Science and Electrical Engineering Beihang University

Motivated by the autopilot of an unmanned aerial vehicle（UAV） with a wide flight envelope span experiencing large parametric variations in the presence of uncertainties, a fuzzy adaptive tracking controller（FATC） is proposed. The controller consists of a fuzzy baseline controller and an adaptive increment, and the main highlight is that the fuzzy baseline controller and adaptation laws are both based on the fuzzy multiple Lyapunov function approach, which helps to reduce the conservatism for the large envelope and guarantees satisfactory tracking performances with strong robustness simultaneously within the whole envelope. The constraint condition of the fuzzy baseline controller is provided in the form of linear matrix inequality（LMI）, and it specifies the satisfactory tracking performances in the absence of uncertainties. The adaptive increment ensures the uniformly ultimately bounded（UUB） predication errors to recover satisfactory responses in the presence of uncertainties. Simulation results show that the proposed controller helps to achieve high-accuracy tracking of airspeed and altitude desirable commands with strong robustness to uncertainties throughout the entire flight envelope.

关键词： Flight control systems Full flight envelope Fuzzy adaptive tracking control Fuzzy multiple Lyapunov function Fuzzy T–S model Single hidden layer neural network

Co-oxidation of arsenic(Ⅲ) and iron(Ⅱ) ions by pressurized oxygen in acidic solutions

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International Journal of Minerals,Metallurgy and Materials 2020年第2期27卷 181-189页

作者： Ke-zhou Song Ping-chao Ke zhi-yong liu zhi-hong liu School of Metallurgy and Environment Central South University

The co-oxidation of As(Ⅲ) and Fe(Ⅱ) in acidic solutions by pressured oxygen was studied under an oxygen pressure between 0.5 and 2.0 MPa at a temperature of 150℃. It was confirmed that without Fe(Ⅱ) ions, As(Ⅲ) ions in the solutions are virtually non-oxidizable by pressured oxygen even at a temperature as high as 200℃ and an oxygen pressure up to 2.0 MPa. Fe(Ⅱ) ions in the solutions did have a catalysis effect on the oxidation of As(Ⅲ), possibly attributable to the production of such strong oxidants as hydroxyl free radicals (OH ) and Fe(Ⅳ) in the oxidation process of Fe(Ⅱ). The effects of such factors as the initial molar ratio of Fe(Ⅱ)/As(Ⅲ), initial pH value of the solution, oxygen pressure, and the addition of radical scavengers on the oxidation efficiencies of As(Ⅲ) and Fe(Ⅱ) were studied. It was found that the oxidation of As(Ⅲ) was limited in the co-oxidation process due to the accumulation of the As(Ⅲ) oxidation product, As(Ⅴ), in the solutions.

关键词： co-oxidation As As(Ⅲ)oxidation Fe(Ⅱ) pressured oxygen radical scavenger

Late-model Ionic Clusters of KNO_3 and Their Configurations

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Chemical Research in Chinese Universities 2005年第5期21卷 587-591页

作者： SHI Lei YANG zhi liu zhi-qiang liu Shu-ying School of Public Health Jilin University Changchun 130021 P. R. China Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China

Late-model ionic clusters of KNO3 were formed under the conditions of electrospray ionization. A series of peaks of the ionic clusters could be observed in the electrospray ionization mass spectra（ESIMS）. The general formulae of the ionic clusters were deduced to be K^ ＋（ KNO3 ） m and NO3^-（ KNO3 ）m. By referring to the crystal structure of KNOs , the possible configurations of these new typical ionic clusters were speculated based on the calculated data by means of the Gaussian-94^x computer program.

关键词： Cluster KNO3 Configuration Gaussian-94^* computer program

Universal and General Quantum Simultaneous Secret Distribution with Dense Coding by Using One-Dimensional High-Level Cluster States

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Journal of Computer Science & Technology 2021年第1期36卷 221-230页

作者： zhi-Hao liu Han-Wu Chen School of Computer Science and Engineering Southeast UniversityNanjing 211189China Key Laboratory of Computer Network and Information Integration(Southeast University) Ministry of Education Nanjing 211189China

A universal and general quantum simultaneous secret distribution(QSSD)protocol is put forward based on the properties of the one-dimensional high-level cluster states,in which one sender dispatches different high-level classical secret messages to many users at the same *** to the idea of quantum dense coding,the sender can send different two-dit classical messages(two d-level classical numbers)to different receivers simultaneously by using a one-dimensional d-level cluster state,which means that the information capacity is up to the *** estimate the security of quantum channels,a new eavesdropping check strategy is put ***,a new attack model,the general individual attack is proposed and *** is shown that the new eavesdropping check strategy can effectively prevent the traditional attacks including the general individual *** addition,multiparty quantum secret report(MQSR,the same as quantum simultaneous secret submission(QSSS))in which different users submit their different messages to one user simultaneously can be gotten if the QSSD protocol is changed a little.

关键词： quantum simultaneous secret distribution(QSSD) multiparty quantum secret report(MQSR) quantum simultaneous secret submission(QSSS) quantum secret sharing quantum broadcast communication