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CO2 Electroreduction in Ionic Liquids： A Review

Chinese Journal of Chemistry 2018年第10期36卷 961-970页

作者： Jianpeng Feng Shaojuan Zeng Jiaqi Feng Haifeng Dong Xiangping Zhang Beijing Key Laboratory of Ionic Liquids Clean Process Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China College of Chemical and Engineering University of Chinese Academy of Sciences Beijing 100049 China

The increasing emission of carbon dioxide （CO2） caused by the unrestrained consumption of fossil fuels in recent hundreds of years, has caused global environmental and social problems. Meanwhile, CO2 is a cheap, abundant and renewable Cl-feedstock, which can be converted into alco- hols, ethers, acids and other value-added chemicals. Compared with the thermal reactions, electrochemical reduction of CO2 is more attractive because of its advantages by using the seasonal, geographical and intermittent energy （tide, wind and solar） under mild conditions. In recent years, taking ionic liquids （ILs） as electrolytes in the CO2 electrochemical reduction reaction has been paid much more attention due to the advantages of lowering the overpotential of CO2 electroreduction and improving the Faradaic efficiency. In this paper, we summarized the recent progresses of electrochemical re- duction of CO2 in ILs electrolytes, and analyzed the reaction mechanism of CO2 reaction in the electrode-electrolyte interface region by experimental and simulation methods. Finally, the research which needs to be highlighted in this area was proposed.

关键词： ionic liquids CO2 reduction charge transfer electric double layer mechanism

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A Memetic Algorithm Based Feature Weighting for Metabolomics Data Classification

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Chinese Journal of Electronics 2014年第4期23卷 706-711页

作者： ZHOU Jiarui ZHU Zexuan JI Zhen College of Biomedical Engineering and Instrument Science Zhejiang University Shenzhen City Key Laboratory of Embedded System Design College of Computer Science and Software EngineeringShenzhen University

A metaheuristic chain based memetic algorithm namely MCMA is proposed for the classification of metabolomics data. MCMA regards both global evolution and local search as equivalent elemental metaheuristics,and searches with a chain of metaheuristics performed alternatively on the target problem. A hidden Markov model based scheduling mechanism is employed in MCMA for the selection of metaheuristics. By using MCMA for optimizing the linkage weight vector, a feature weighting algorithm for metabolomics data is formed to identify relevant metabolite features and reveal their exact relationships with the given physiological states. An extreme learning machine based classifier is utilized in predicting the physiological states according to the weighted metabolite features. Experimental results on real metabolomics data of clinical liver transplantation demonstrate that the proposed feature weighting and classification method obtains better performance than the other compared algorithms.

关键词： Metabolomics Feature weighting Memetic algorithm

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Hydrothermal Synthesis of β-FeOOH with Different Morphologies Using NaH_2PO_4 as Structural Modifier

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Journal of Wuhan University of Technology(Materials Science) 2012年第4期27卷 662-664页

作者：柴林玉陈运法 State Key Laboratory of Multi-Phase Complex System Institute of Process Engineering Chinese Academy of Sciences Graduate School of the Chinese Academy of Sciences

Different morphologies of β-FeOOH were prepared by hydrothermal synthesis using NaH2PO4 as structural modifier. The rod-shaped, straw-like and flower-like products could be controllably obtained. The as-obtained products were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and Ultraviolet-visible （UV-Vis） absorption spectroscopy. The experimental results show that the morphology manipulation could be achieved by adding different amounts of NaH2PO4. XRD pattern indicates that the as-prepared sample is the pure tetragonal phase of β-FeOOH. UV-Vis absorption spectra of the products are affected by their morphologies, which shows that both the rod-shaped and straw-like β-FeOOH have outstanding absorption ability on the whole UV area （200-400 nm）, which will have vast application prospects in UV protection.

关键词： β-FeOOH hydrothermal NaH2PO4 UV absorption

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Parameter Estimation of Multiple Mono-Pulse Radar Signals Intercepted by Nyquist Folding Receiver Using Periodic Chirp Local Oscillator Based on Periodic Fractional Autocorrelation

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Chinese Journal of Electronics 2022年第1期31卷 181-189页

作者： QIU Zhaoyang LI Tingpeng WANG Yiming State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System (CEMEE) School of Communication Engineering Hangzhou Dianzi University School of Rail Transportation Soochow University

The frequency space of modern radar system has been extended to a wide range. To intercept the modern radar signals with high interception probability, the wideband receiving is of significance to the radar reconnaissance receiver. The Nyquist folding receiver(NYFR) is a novel ultra-wideband receiving architecture,which requires a small amount of equipment. Because the mono-pulse radar signal is widely used in radar systems,the multiple mono-pulse radar signals will be intercepted by the NYFR. The parameter estimation of multiple simultaneous arrival mono-pulse radar signals intercepted by the NYFR using periodic chirp local oscillator is considered. The definition of periodic fractional autocorrelation(PFA) is proposed. Based on the PFA, a novel fast parameter estimation method is given. The proposed estimation approach can estimate the multiple NYFR outputs under frequency aliasing condition and has low computational complexity. Simulation results show the effectiveness of the proposed method.

关键词： modern radar signals computational complexity modern radar system probability Nyquist folding receiver multiple NYFR ultra wideband communication novel fast parameter estimation method radar systems multiple mono-pulse radar signals radio receivers periodic chirp local oscillator periodic fractional autocorrelation high interception probability novel ultra-wideband receiving architecture radar signal processing signal detection radar receivers radar reconnaissance receiver parameter estimation receivers mono-pulse radar signal multiple simultaneous arrival mono-pulse radar signals

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Accelerating degradation rate of pure iron by zinc ion implantation

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Regenerative Biomaterials 2016年第4期3卷 205-215页

作者： Tao Huang Yufeng Zheng Yong Han State Key Laboratory for Turbulence and Complex System and Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China State Key Laboratory for Mechanical Behavior of Materials Xian Jiaotong UniversityXian 710049China

Pure iron has been considered as a promising candidate for biodegradable implant ***,a faster degradation rate of pure iron is needed to meet the clinical *** this work,metal vapor vacuum arc technology was adopted to implant zinc ions into the surface of pure *** showed that the implantation depth of zinc ions was about 60 *** degradation rate of pure iron was found to be accelerated after zinc ion *** cytotoxicity tests revealed that the implanted zinc ions brought a slight increase on cytotoxicity of the tested *** terms of hemocompatibility,the hemolysis of zinc ion implanted pure iron was lower than 2%.However,zinc ions might induce more adhered and activated platelets on the surface of pure ***,zinc ion implantation can be a feasible way to accelerate the degradation rate of pure iron for biodegradable applications.

关键词： biodegradable metals iron zinc ion implantation biocompatibility

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Condition Monitoring for Railway Point Machines Based on Sound Analysis and Support Vector Machine

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Chinese Journal of Electronics 2020年第4期29卷 786-792页

作者： SUN Yongkui CAO Yuan XIE Guo WEN Tao School of Electronic and Information Engineering Beijing Jiaotong University National Engineering Research Center of Rail Transportation Operation and Control System Beijing Jiaotong University Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing Xi'an University of Technology

Railway point machines(RPMS) are one of the key equipments in the railway system to switch different routes for the *** monitoring for RPMs is a vital measure to keep train operation safe and *** convenience and low cost into consideration, a novel intelligent condition monitoring method for RPMs based on sound analysis is ***-domain and frequency-domain features are obtained,and normalized using z-score standardization method to eliminate the influences of different *** particle swarm optimization(BPSO) is utilized to select the most significant discrimination feature *** effects of the selected optimal features are verified using Support vector machine(SVM), 1-Nearest neighbor(1 NN), Random forest(RF), and Naive Bayes(NB).Experiment results indicate SVM performs best on identification accuracy and computing cost compared with the other three *** identification accuracies on normal switching and reverse switching processes reach100% and 99.67%, respectively, indicating the feasibility of the proposed method.

关键词： Condition monitoring Sound analysis Railway point machines(RPMs) Binary particle swarm optimization(BPSO) Support vector machine(SVM)

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Diameter-dependent in vitro performance of biodegradable pure zinc wires for suture application

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Journal of Materials Science & Technology 2019年第8期35卷 1662-1670页

作者： H. Guo R.H. Cao Y.F. Zheng J. Bai F. Xue C.L. Chu State Key Laboratory for Turbulence and Complex System and Department of Materials Science and Engineering College of Engineering Peking University Beijing 100871 China School of Materials Science and Engineering Southeast University Nanjing 211189 China Key Laboratory for Advanced Metallic Materials Southeast University Nanjing 211189 China

In this study, biodegradable pure zinc wires with 3.0 mm and 0.3 mm in diameter were prepared via hot-extrusion and subsequent cold-drawing process respectively. The microstructure, mechanical performance, corrosion behavior, in vitro cytocompatibility and antibacterial effect were comparatively *** cold-drawing, the mechanical property, especially the elongation of the ф0.3 mm pure Zn wire was improved significantly compared with the ф3.0 mm pure Zn wire. The in vitro corrosion study including immersion and electrochemical test showed acceptable corrosion resistance of these two materials in Hank's solution. The in vitro Human Umbilical Vein Endothelial Cells(HUVECs) viability assay showed obviously different results, in which the ф0.3 mm pure Zn wire demonstrated favorable cytocompatibility, while the ф3.0 mm wire exhibited severe cytotoxic effect with 100% extract concentration. Both of them exhibited partly antibacterial effect on S. aureus. These results demonstrated the feasibility of the prepared 0.3 mm pure Zn wire as the potential suture material with good absorbability.

关键词： Pure zinc Wire Biodegradable metal Suture

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Pinning consensus analysis of multi-agent networks with arbitrary topology

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Chinese Physics B 2013年第9期22卷 183-189页

作者：纪良浩廖晓峰陈欣 State Key Laboratory of Power Transmission Equipment & System Security and New Technology College of Computer ScienceChongqing University Chongqing key Laboratory of Computational Intelligence (Chongqing University of Posts and Telecommunications) School of Software Engineering Chongqing University

In this paper the pinning consensus of multi-agent networks with arbitrary topology is investigated. Based on the properties of M-matrix, some criteria of pinning consensus are established for the continuous multi-agent network and the results show that the pinning consensus of the dynamical system depends on the smallest real part of the eigenvalue of the matrix which is composed of the Laplacian matrix of the multi-agent network and the pinning control gains. Meanwhile, the relevant work for the discrete-time system is studied and the corresponding criterion is also obtained. Particularly, the fundamental problem of pinning consensus, that is, what kind of node should be pinned, is investigated and the positive answers to this question are presented. Finally, the correctness of our theoretical findings is demonstrated by some numerical simulated examples.

关键词： multi-agent pinning control consensus synchronization

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Development and Control of Underwater Gliding Robots:A Review

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IEEE/CAA Journal of Automatica Sinica 2022年第9期9卷 1543-1560页

作者： Jian Wang Zhengxing Wu Huijie Dong Min Tan Junzhi Yu the State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190 the School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China the State Key Laboratory for Turbulence and Complex System Department of Mechanics and Engineering ScienceBIC-ESATCollege of EngineeringPeking UniversityBeijing 100871China

As one of the most effective vehicles for ocean development and exploration,underwater gliding robots(UGRs)have the unique characteristics of low energy consumption and strong ***,by borrowing the motion principles of current underwater robots,a variety of novel UGRs have emerged with improving their maneuverability,concealment,and environmental friendliness,which significantly broadens the ocean *** this paper,we provide a comprehensive review of underwater gliding robots,including prototype design and their key *** the perspective of motion characteristics,we categorize the underwater gliding robots in terms of traditional underwater gliders(UGs),hybrid-driven UGs,bio-inspired UGs,thermal UGs,and ***,their buoyancy driven system,dynamic and energy model,and motion control are concluded with detailed ***,we have discussed the current critical issues and future *** review offers valuable insight into the development of next-generation underwater robots well-suited for various oceanic applications,and aims to gain more attention of researchers and engineers to this growing field.

关键词： Buoyancy driven motion control oceanic applications system development underwater gliding robots

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Two-fluid modeling of Geldart A particles in gas-solid micro-fluidized beds

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Particuology 2015年第4期13卷 118-127页

作者： Xiaoxing Liu Chuanqiang Zhu Shujun Geng Meiqin Yao Jinhui Zhan Guangwen Xu State Key Laboratory of Multi-phase Complex System Institute of Process Engineering Chinese Academy of Science Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

The fiuidization behavior of Geldart A particles in a gas-solid micro-fluidized bed was investigated by Eulerian-Eulerian numerical simulation. The commonly used Gidaspow drag model was tested first. The simulation showed that the predicted minimum bubbling velocities were significantly lower than the experimental data even when an extremely fine grid size （of approximately one particle diameter） was used. The modified Gibilaro drag model was therefore tested next. The predicted minimum bubbling velocity and bed voidage were in reasonable agreement with the experimental data available in literature. The experimentally observed regime transition phenomena from bubbling to slugging were also reproduced successfully in the simulations. Parametric studies indicated that the solid-wall boundary conditions had a significant impact on the predicted gas and solid flow behavior.

关键词： Micro-fluidized bed Geldart A particle Two-fluid model Boundary condition Drag model

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