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Journal of Environmental Sciences 2018年第3期30卷 236-245页

作者： Xueqin Bao zhen qin Tianshu Zhou Jingjing Deng School of Ecological and Environmental Sciences East China Normal University

In this work,the gold nanoparticles（Au-NPs）were in-situ generated on the surface of MnO2nanosheets to form MnO2/Au-NPs nanocomposite in a simple and cost-effective *** experiments were carried out to optimize the oxidation of basic dye（Methylene Blue（MB））,including the molar ratio of MnO2to chloroauric acid（HAu Cl4）,the p H of the solution and the effect of initial *** the optimal condition,the highest degradation efficiency for MB achieved to 98.9%within 60 min,which was obviously better than commercial MnO2powders（4.3%）and MnO2nanosheets（74.2%）.The enhanced oxidative degradation might attribute to the in-situ generation of ultra-small and highly-dispersed Au-NPs which enlarged the synergistic effect and/or interfacial effect between MnO2nanosheets and Au-NPs and facilitated the uptake of electrons by MnO2from MB during the oxidation,thus validating the application of MnO2/Au-NPs nanocomposite for direct removal of organic dyes from wastewater in a simple and convenient fashion.

关键词： MnO2/Au-NPs nanocomposite In-situ generation Dye degradation Synergistic effect and inteffacial effect Enhanced oxidative degradation

Covalent organic framework-based solid-state electrolytes for advanced batteries

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Science China Chemistry 2024年第12期67卷 4037-4062页

作者： Desheng Feng zhen qin Yumei Ren Yuxi Xu School of Materials Science and Engineering Zhengzhou University of AeronauticsZhengzhou 450046China School of Engineering Westlake UniversityHangzhou 310024China

The emergence of solid-state batteries(SSBs)has generated significant interest in the field of energy storage,primarily due to their advantages such as high safety,high energy density and long *** state electrolytes(SSEs)play a crucial role in SSBs,which not only affects the ion transport efficiency,but also relates to the overall performance and stability of the *** recent years,SSEs based on covalent organic frameworks(COFs)have become a research focus in the battery field because of their unique structural characteristics and excellent *** review aims to provide an overview of the application and latest progress of COF-based SSEs in the field of advanced ***,the structural features of COFs and their advantages as SSEs are briefly introduced,followed by a summary of the types of COF-based SSEs(including neutral COF-based SSEs and ionic COF-based SSEs).The latest research progress in lithium ion batteries(LIBs),lithium metal batteries(LMBs),proton exchange membrane fuel cells(PEMFCs)and other advanced batteries recently is also ***,we summarize and outlook the current research status,the challenges faced in practical application,the future research directions and application prospects of COF-based SSEs.

关键词： covalent organic framework solid-state electrolytes advanced batteries

Diverge from the norm

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National Science Review 2014年第1期1卷 22-24页

作者： zhen Li Anjun qin Department of Chemistry Wuhan University Department of Polymer Science and Engineering Zhejiang University Guangdong Innovative Research Team State Key Laboratory of Luminescent Materials and DevicesSouth China University of Technology

It has been a general belief that luminophore aggregation normally quenches light *** conceptualization of‘aggregation-induced emission’(AIE)breaks this‘common law’and provides a new stage for the exploration of practically useful light-emiting *** booming development in this emerging area of research has recently been showcased at the First International Symposium on Aggregation-Induced Emission(ISAIE)held in Wuhan,China.

关键词： AIE Diverge from the norm

Analytical solutions of the Rayleigh-Plesset equation for N-dimensional spherical bubbles

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Science China(Physics,Mechanics & Astronomy) 2017年第10期60卷 71-74页

作者： zhen Wang YuPeng qin Li Zou School of Mathematical Sciences Dalian University of Technology Dalian 116024 China School of Naval Architecture State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian 116024 China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration Shanghai 200240 China

The behaviors and dynamics of bubbles, usually described by the Rayleigh-Plesset （RP） equation and its generalizations, have been an interesting area in fluid dynamics. Owing to their simplicity and sufficient accuracy, the RP equation for bubble dynamics and its enhanced models remains widely used in science and engineering, see refs. [1-3]. In this paper, we consider the RP equation for N-dimensions spherical bubbles in an incompressible, inviscid, infinite liquid with uniform far-field pressure [4]

关键词： set方程气泡动力学 n维解析解球面流体动力学增强模型参考文献

Random Group Recommendation Model Based on Fuzzy Clustering

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Journal of Electronic Science and Technology 2020年第2期18卷 169-178页

作者： Zhe Ding zhen qin Qi-Xu Wang Zhi-Guang qin School of Information and Software Engineering University of Electronic Science and Technology of ChinaChengdu 610054

The group recommendation system is a viral requirement for the Internet service provider to provide recommendation services for all the users in a group. Due to the shared or different interests among users in the group, it is difficult for traditional personal recommendation algorithms to predict items that can meet the requirements of all the users in the group. In this paper, a random group recommendation model is proposed to recommend the top K most appealing items for all the users in a random group. By analyzing item ratings of all the users in the group, the recommendation model can abstract the group as a virtual user. Then a personal recommendation algorithm is applied to suggest the top K most appealing items for the virtual user. And the preference score and fuzzy clustering algorithm based on multiclass are applied to optimize the recommendation result of the group recommendation model. Finally, the Movie Lens-100 K dataset is applied to verify the efficiency of the recommendation model. The experimental results show that the items recommended by the proposed group recommendation model are more popular for all the users in the group than the items recommended by traditional group recommendation algorithms.

关键词： services app service

Parametric Research of Experiments on a Carangiform Robotic Fish

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Journal of Bionic Engineering 2008年第2期5卷 95-101页

作者： qin Yan zhen Han Shi-wu Zhang Jie Yang Department of Precision Machinery and Precision Instrumentation University of Science and Technology of China Hefei 230026 P R. China

In this paper, a carangiform robotic fish with 4-DoF （degree of freedom） tail has been developed. The robotic fish has capability of swimming under two modes that are radio control and autonomous swimming. Experiments were conducted to investigate the influences of characteristic parameters including the frequency, the amplitude, the wave length, the phase difference and the coefficient on forward velocity. The experimental results shown that the swimming performance of the robotic fish is affected mostly by the characteristic parameters observed.

关键词： biomimetic robotic fish experimental parameter matrix undulation equation body length velocity

Modeling and H_∞ Robust Control of a Smart Structure with Rate-dependent Hysteresis Nonlinearity

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International Journal of Automation and computing 2014年第1期11卷 51-58页

作者： Ping Liu zhen-Yan Wang zhen Zhang Jian-qin Mao Ke-Min Zhou School of Automation Science and Electrical Engineering Beijing University of Aeronautics & Astronautics School of Electrical Engineering Southwest Jiaotong University School of Electrical Engineering and Computer Science Louisiana State University

The performance of smart structures in trajectory tracking under sub-micron level is hindered by the rate-dependent hysteresis *** this paper,a Hammerstein-like model based on the support vector machines(SVM)is proposed to capture the rate-dependent hysteresis *** show that it is possible to construct a unique dynamic model in a given frequency range for a rate-dependent hysteresis system using the sinusoidal scanning signals as the training set of signals for the linear dynamic subsystem of the Hammerstein-like ***,a two-degree-of-freedom(2DOF)H∞robust control scheme for the ratedependent hysteresis nonlinearity is implemented on a smart structure with a piezoelectric actuator(PEA)for real-time precision trajectory *** and experiments on the structure verify both the efectiveness and the practicality of the proposed modeling and control methods.

关键词： Rate-dependent hysteresis Hammerstein-like model support vector machines(SVM) H∞ robust control piezoelectric actuator

Enhancing the compatibility of the amyloid-dye hybrid nanostructure for improved photo-biocatalysis

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Journal of Energy Chemistry 2023年第3期78卷 430-437,I0012页

作者： zhen Dong Yanying Wang qin Yang Dan Li Peng Wu College of Chemistry Sichuan UniversityChengdu 610064SichuanChina Analytical&Testing Centre State Key Laboratory of Hydraulics and Mountain River EngineeringSichuan UniversityChengdu 610064SichuanChina College of Biomass Science and Engineering Sichuan UniversityChengdu 610064SichuanChina School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007HenanChina

Artificial photosynthesis is significant for renewable energy generation,sustainable development,and environmental ***-protein hybrids are promising for developing photosynthesis mimics(e.g.,photo-biocatalysis),but their performances are far lower than the plant photosystems,partially because of the incompatibility between dye and the protein matrix that limits excited state electron transfer of the included ***,using ThT-insulin amyloid assembly as a model system,we proposed that increasing the dye-protein compatibility could lead to the improved photo-biocatalytic performance.A ThT derivative,ThTPD,was designed with the same electron acceptor but extended π-conjugated donor *** integrated into the insulin amyloid,the extended π-conjugated donor structure allowed increased binding affinity and energy with the amyloid matrix,thus better electron transport to the mediator to drive the photocatalytic ***,compared with ThT, ThTPD exhibited improved light absorption and longer excited state *** photo-biocatalytic performance of ThTPD-insulin amyloid was greatly improved as compared with that of ThT in reduced nicotinamide adenine dinucleotide(NADH) *** integrating with NADH-dependent L-glutamate reductase,the efficiency of the ThTPD-insulin amyloid hybrid was 2.8-fold higher than that of ThT in glutamate generation,showing promising feature in biocatalytic solar-to-chemical conversion.

关键词： Photo-biocatalysis Dye-protein assembly Insulin amyloid ThT Compatibility

Moving object detection based on optical flow and neural network fusion

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International Journal of Intelligent Computing and Cybernetics 2016年第4期9卷 325-335页

作者： Haiqun qin Ziyang zhen Kun Ma College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjingChina

Purpose-The purpose of this paper is to meet the large demand for the new-generation intelligence monitoring systems that are used to detect targets within a dynamic ***/methodology/approach-A dynamic target detection method based on the fusion of optical flow and neural network is ***-Simulation results verify the accuracy of the moving object detection based on optical flow andneural network *** eliminates the influence caused bythe movement of thecamera to detect the target and has the ability to extract a complete moving *** implications-It provides a powerful safeguard for target detection and targets the tracking ***/value-The proposed method represents the fusion of optical flow and neural network to detect the moving object,and it can be used in new-generation intelligent monitoring systems.

关键词： Neural network Fusion Moving object detection Optical flow

Numerical Resolution Near t=0 of Nonlinear Evolution Equations in the Presence of Corner Singularities in Space Dimension 1

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Communications in Computational Physics 2011年第3期9卷 568-586页

作者： qingshan Chen zhen qin Roger Temam Department of Scientific Computing Florida State UniversityTallahasseeFL 32306USA Institute for Scientific Computing and Applied Mathematics Indiana UniversityBloomingtonIN 47405USA

The incompatibilities between the initial and boundary data will cause singularities at the time-space corners,which in turn adversely affect the accuracy of the numerical schemes used to compute the *** study the corner singularity issue for nonlinear evolution equations in 1D,and propose two remedy procedures that effectively recover much of the accuracy of the numerical scheme in *** of the remedy procedures to the 1D viscous Burgers equation,and to the 1D nonlinear reaction-diffusion equation are *** remedy procedures are applicable to other nonlinear diffusion equations as well.

关键词： Compatibility conditions corner singularities viscous Burgers equation nonlinear convection diffusion equation finite element methods