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| 1 | Design and Optimization of Wheel-legged Robot:Rolling-Wolf显示文摘Though the studies of wheel-legged robots have achieved great success, the existing ones still have defects in load distribution, structure stability and carrying capacity. For overcoming these shortcomings, a new kind of wheel-legged robot(Rolling-Wolf) is designed. It is actuated by means of ball screws and sliders, and each leg forms two stable triangle structures at any moment, which is simple but has high structure stability. The positional posture model and statics model are built and used to analyze the kinematic and mechanical properties of Rolling-Wolf. Based on these two models, important indexes for evaluating its motion performance are analyzed. According to the models and indexes, all of the structure parameters which influence the motion performance of Rolling-Wolf are optimized by the method of Archive-based Micro Genetic Algorithm(AMGA) by using Isight and Matlab software. Compared to the initial values, the maximum rotation angle of the thigh is improved by 4.17%, the maximum lifting height of the wheel is improved by 65.53%, and the maximum driving forces of the thigh and calf are decreased by 25.5% and 12.58%, respectively. The conspicuous optimization results indicate that Rolling-Wolf is much more excellent. The novel wheel-leg structure of Rolling-Wolf is efficient in promoting the load distribution, structure stability and carrying capacity of wheel-legged robot and the proposed optimization method provides a new approach for structure optimization. | LUO Yang LI Qimin LIU Zhangxing | 2014 | Chinese Journal of Mechanical Engineering2014，27，6： | 12 |
| 2 | Comparison of machine learning methods for estimating permeability and porosity of oil reservoirs via petro-physical logs显示文摘This paper deals with the comparison of models for predicting porosity and permeability of oil reservoirs by coupling a machine learning concept and petrophysical logs.Different machine learning methods including conventional artificial neural network,genetic algorithm,fuzzy decision tree,the imperialist competitive algorithm(ICA),particle swarm optimization(PSO),and a hybrid of those ones are employed to have a comprehensive comparison.The machine learning approach was constructed and tested via data samples recorded from northern Persian Gulf oil reservoirs.The results gained from the machine learning models used in this paper are compared to the relevant real petrophysical data and the outputs achieved by other methods employed in our previous studies.The average relative absolute deviation between the approach estimations and the relevant actual data is found to be less than 1%for the hybridized approaches.The results reported in this paper indicate that implication of hybridized machine learning methods in porosity and permeability estimations can lead to the construction of more reliable static reservoir models in simulation plans. | Mohammad Ali Ahmadi Zhangxing Chen | 2019 | Petroleum2019，5，3： | 6 |
| 3 | Preparation of chemical manganese dioxide from manganese sulfate显示文摘Chemical Manganese Dioxide (CMD) was prepared by an alkali-oxidation method. There are several virtues to this environmental friendly and clean process, including the nontoxic and harmless reagents and products, easy operations, no pollutants, easily obtained raw materials and moderate reaction conditions. The synthesized manganese dioxide was characterized by XRD and SEM. The particles were small, consisting primarily of α-MnO2 and γ-MnO2. Experimental results showed that the optimum conditions were: MnSO4?H2O to NaOH ratio, 1.0:2.4; catalyst concentration (catalyst TF-2), 6% of the MnSO4; initial solution pH, 11; reaction time and temperature, 20 min and 80 °C; air flow, 0.20 m3/h; and, agitation rate, 700 r/min. The conversion of MnSO4 can exceed 80% under these optimum conditions. | FU Jiangang, HE Zhangxing, WANG Hui, LIANG Wei, GUO Chao College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China | 2010 | Mining Science and Technology2010，20，6： | 5 |
| 4 | Recent advances and perspectives on vanadium-and manganese-based cathode materials for aqueous zinc ion batteries显示文摘The growing demand for energy storage has inspired researchers’exploration of advanced batteries.Aqueous zinc ion batteries(ZIBs)are promising secondary chemical battery system that can be selected and pursued.Rechargeable ZIBs possess merits of high security,low cost,environmental friendliness,and competitive performance,and they are received a lot of attention.However,the development of suitable zinc ion intercalation-type cathode materials is still a big challenge,resulting in failing to meet the commercial needs of ZIBs.Both vanadium-based and manganese-based compounds are representative of the most advanced and most widely used rechargeable ZIBs electrodes.The valence state of vanadium is+2~+5,which can realize multi-electron transfer in the redox reaction and has a high specific capacity.Most of the manganese-based compounds have tunnel structure or three-dimensional space frame,with enough space to accommodate zinc ions.In order to understand the energy storage mechanism and electrochemical performance of these two materials,a specialized review focusing on state-of-the-art developments is needed.This review offers access for researchers to keep abreast of the research progress of cathode materials for ZIBs.The latest advanced researches in vanadium-based and manganese-based cathode materials applied in aqueous ZIBs are highlighted.This article will provide useful guidance for future studies on cathode materials and aqueous ZIBs. | Na Liu Bin Li Zhangxing He Lei Dai Haiyan Wang Ling Wang | 2021 | Journal of Energy Chemistry2021，30，8： | 5 |
| 5 | KHCO_3 activated carbon microsphere as excellent electrocatalyst for VO^(2+)/VO_2^+ redox couple for vanadium redox flow battery显示文摘In this paper,carbon microsphere prepared by hydrothermal treatment was activated by KHCO_3 at high temperature,and employed as the catalyst for VO^(2+)/VO_2^+redox reaction for vanadium redox flow battery(VRFB).Carbon microsphere can be etched by KHCO_3 due to the reaction between the pyrolysis products of KHCO_3 and carbon atoms.Moreover,KHCO_3 activation can bring many oxygen functional groups on carbon microsphere,further improving the wettability of catalyst and increasing the active sites.The electrocatalytic properties of carbon microsphere from hydrothermal treatment are improved by high temperature carbonization,and can further be enhanced by KHCO_3 activation.Among carbon microsphere samples,the VO^(2+)/VO_2^+redox reaction exhibits the highest electrochemical kinetics on KHCO_3 activated sample.The cell using KHCO_3 activated carbon microsphere as the positive catalyst demonstrates higher energy efficiency and larger discharge capacity,especially at high current density.The results reveal that KHCO_3 activated carbon microsphere is an efficient,low-cost carbon-based catalyst for VO^(2+)/VO_2^+redox reaction for VRFB system. | Chen Zhao Yuehua Li Zhangxing He Yingqiao Jiang Lu Li Fengyun Jiang Huizhu Zhou Jing Zhu Wei Meng Ling Wang Lei Dai | 2019 | Journal of Energy Chemistry2019，28，2： | 5 |
| 6 | Metal-Organic Frameworks Functionalized Separators for Robust Aqueous Zinc-Ion Batteries显示文摘Aqueous zinc-ion batteries(AZIBs)are one of the promising energy storage systems,which consist of electrode materials,electrolyte,and separator.The first two have been significantly received ample development,while the prominent role of the separators in manipulating the stability of the electrode has not attracted sufficient attention.In this work,a separator(UiO-66-GF)modified by Zr-based metal organic framework for robust AZIBs is proposed.UiO-66-GF effectively enhances the transport ability of charge carriers and demonstrates preferential orientation of(002)crystal plane,which is favorable for corrosion resistance and dendrite-free zinc deposition.Consequently,Zn|UiO-66-GF-2.2|Zn cells exhibit highly reversible plating/stripping behavior with long cycle life over 1650 h at 2.0 mA cm^(−2),and Zn|UiO-66-GF-2.2|MnO_(2) cells show excellent long-term stability with capacity retention of 85%after 1000 cycles.The reasonable design and application of multifunctional metal organic frameworks modified separators provide useful guidance for constructing durable AZIBs. | Yang Song Pengchao Ruan Caiwang Mao Yuxin Chang Ling Wang Lei Dai Peng Zhou Bingan Lu Jiang Zhou Zhangxing He | 2022 | Nano-Micro Letters2022，14，12： | 5 |
| 7 | Stearic Acid/Copper Foam as Composite Phase Change Materials for Thermal Energy Storage显示文摘The application of stearic acid in the latent thermal energy storage(LTES) systems is hindered due to its lower heat transfer rate. Stearic acid(SA) was blended with copper foam(CF) of pore numbers per inch(PPI) of 5, 20, and 40 to prepare composite phase change materials via a molten impregnation method. The thermal physical properties including latent heat, phase change temperature, and thermal energy storage density of composites were characterized. The thermogravimetric analysis indicated that the loadages of SA of SA/CF(5 PPI), SA/CF(20 PPI), and SA/CF(40 PPI) were 74.69%, 71.03%, and 63.54%, respectively;The latent heat of SA/CF(5 PPI), SA/CF(20 PPI), and SA/CF(40 PPI) were determined to 139.9 J·g^-1, 132.7 J·g^-1, and 117.8 J·g^-1, respectively. Meanwhile, the infrared thermal images of SA and SA/CF composites were provided to demonstrate the thermal energy storage and dissipation capability intuitively by the temperature response and surface temperature distribution. The infrared thermal images indicated the addition of CF also reduced the fluidity of liquid SA, and the SA/CF(40 PPI) had better internal heat transfer uniformity and thermal diffusion performance than SA/CF(5 PPI) and SA/CF(20 PPI). All these thermal properties suggested SA/CF(40 PPI) has the potential application in the latent thermal energy storage. | LI Chuanchang ZHAO Xinbo ZHANG Bo XIE Baoshan HE Zhangxing CHEN Jian HE Jianjun | 2020 | Journal of Thermal Science2020，29，2： | 5 |
| 8 | Modified carbon cloth as positive electrode with high electrochemical performance for vanadium redox flow batteries显示文摘Carbon cloth modified by hydrothermal treatment in ammonia water is developed as the positive electrode with high electrochemical performance for vanadium redox flow batteries.The SEM shows that the treatment has no obvious influence on the morphology of carbon cloth.XPS measurements indicate that the nitrogenous functional groups can be introduced on the surface of carbon cloth successfully.The electrochemical performance of V(IV)/V(V) redox couple on the prepared electrode is evaluated with cyclic voltammetry and linear sweep voltammetry measurements.The N-doped carbon cloth exhibits outstanding electrochemical activity and reversibility toward V(IV)/V(V) redox couple.The rate constant of V(IV)/V(V) redox reaction on carbon cloth can increase to 2.27 × 10^(-4)cm/s from 1.47 × 10^(-4)cm/s after nitrogen doping.The cell using N-doped carbon cloth as positive electrode has larger discharge capacity and higher energy efficiency compared with the cell using pristine carbon cloth.The average energy efficiency of the cell using N-doped carbon cloth for 50 cycles at 30 m A/cm^2 is 87.8%,4.3% larger than that of the cell using pristine carbon cloth.It indicates that the N-doped carbon cloth has a promise application prospect in vanadium redox flow batteries. | Zhangxing He Zhongsheng Chen Wei Meng Yingqiao Jiang Gang Cheng Lei Dai Ling Wang | 2016 | Journal of Energy Chemistry2016，25，4： | 3 |
| 9 | Nanostructured N-doped carbon materials derived from expandable biomass with superior electrocatalytic performance towards V^(2+)/V^(3+) redox reaction for vanadium redox flow battery显示文摘Vanadium redox flow battery(VRFB)is one of the most promising large-scale energy storage systems,which ranges from kilowatt to megawatt.Nevertheless,poor electrochemical activity of electrode for two redox couples still restricts the extensive applications of VRFB.Compared with V^(2+)/V^(3+)redox reaction,V^(2+)/V^(3+)reaction plays a more significant role in voltage loss of VRFB owing to slow heterogeneous electron transfer rate.Herein,N-doped carbon materials derived from scaphium scaphigerum have been developed as negative electrocatalyst by hydrothermal carbonization and high-temperature nitridation treatments.The undoped carbon material hardly has electrocatalytic ability for V^(2+)/V^(3+)reaction.Based on this,N-doped carbon materials with urea as nitrogen source exhibit excellent electrocatalytic properties.And the material nitrided at 850°C(SSC/N-850)exhibits the best performance among those from700 to 1000℃.SSC/N-850 can accelerate the electrode process including V^(2+)/V^(3+)reaction and mass transfer of active ions due to the large reaction place,more active sites,and good hydrophilicity.The effect of catalyst on comprehensive performance of cell was evaluated.SSC/N-850 can improve the charge-discharge performance greatly.Utilization of SSC/N-850 can lessen the electrochemical polarization of cell,further resulting in increased discharge capacity and energy efficiency.Discharge capacity and energy efficiency increase by 81.5%and 9.8%by using SSC/N-850 as negative catalyst at 150 m A cm^(-2),respectively.Our study reveals that the developed biomass-derived carbon materials are the low-cost and efficient negative electrocatalyst for VRFB system. | Yingqiao Jiang Mengchen Du Gang Cheng Peng Gao Tingting Dong Jing Zhou Xiaojian Feng Zhangxing He Yuehua Li Lei Dai Wei Meng Ling Wang | 2021 | Journal of Energy Chemistry2021，30，8： | 3 |
| 10 | Interfacial Engineering Strategy for High-Performance Zn Metal Anodes显示文摘Due to their high safety and low cost,rechargeable aqueous Zn-ion batteries(RAZIBs)have been receiving increased attention and are expected to be the next generation of energy storage systems.However,metal Zn anodes exhibit a limited-service life and inferior reversibility owing to the issues of Zn dendrites and side reactions,which severely hinder the further development of RAZIBs.Researchers have attempted to design high-performance Zn anodes by interfacial engineering,including surface modification and the addition of electrolyte additives,to stabilize Zn anodes.The purpose is to achieve uniform Zn nucleation and flat Zn deposition by regulating the deposition behavior of Zn ions,which effectively improves the cycling stability of the Zn anode.This review comprehensively summarizes the reaction mechanisms of interfacial modification for inhibiting the growth of Zn dendrites and the occurrence of side reactions.In addition,the research progress of interfacial engineering strategies for RAZIBs is summarized and classified.Finally,prospects and suggestions are provided for the design of highly reversible Zn anodes. | Bin Li Xiaotan Zhang Tingting Wang Zhangxing He Bingan Lu Shuquan Liang Jiang Zhou | 2022 | Nano-Micro Letters2022，14，1： | 3 |
| 11 | Observation on rapid transient explosive boiling under pulsed-laser heating显示文摘Using various kinds of liquids (pure acetone, binary mixtures in various volume fractions of ethanol and acetone) as working liquids, the experiments of rapid transient explosive boiling induced by pulsed-laser irradiation are carried out. The temperature field on a microsecond scale is measured, and the behavior of bubbles is observed and captured by a microscopic camera system. The extreme characteristics that differ from those in normal boiling are clearly revealed. The influence of working liquid species, volume fraction of the mixture, nanoparticles added in the working liquid, and the laser irradiation parameters on the boiling behavior are also studied. | HUAIXiulan DONGZhaoyi LIUDengying ZHANGXing | 2003 | Progress in Natural Science:Materials International2003，13，5： | 2 |
| 12 | Single optical microfiber enabled tactile sensor for simultaneous temperature and pressure measurement显示文摘The ability to sense heat and touch is essential for healthcare,robotics,and human–machine interfaces.By taking advantage of the engineerable waveguiding properties,we design and fabricate a flexible optical microfiber sensor for simultaneous temperature and pressure measurement based on theoretical calculation.The sensor exhibits a high temperature sensitivity of 1.2 nm/℃ by measuring the shift of a high-order mode cutoff wavelength in the short-wavelength range.In the case of pressure sensing,the sensor shows a sensitivity of 4.5%per kilopascal with a fast temporal frequency response of 1000 Hz owing to the strong evanescent wave guided outside the microfiber.The cross talk is negligible because the temperature and pressure signals are measured at different wavelengths based on different mechanisms.The properties of fast temporal response,high temperature,and pressure sensitivity enable the sensor for real-time skin temperature and wrist pulse measurements,which is critical to the accurate analysis of pulse waveforms.We believe the sensor will have great potential in wearable optical devices ranging from healthcare to humanoid robots. | NI YAO XIAOYU WANG SHUQI MA XINGDA SONG SHAN WANG ZHANGXING SHI JING PAN SHIPENG WANG JIANLIANG XIAO HAITAO LIU LONGTENG YU YAO TANG ZHANG ZHANG XIONG LI WEI FANG LEI ZHANG LIMIN TONG | 2022 | Photonics Research2022，10，9： | 2 |
| 13 | Nanometric cutting of single crystal silicon surfaces modified by ion implantation显示文摘 | FANGFZ CHEN Y H ZHANGX D | 2011 | CIRPAnn-ManufTechn2011，60，1： | 1 |
| 14 | TheelectromagneticwaveabsorbingpropertiesoftheferromagneticNinanopGarticles显示文摘 | ZhangX F Wang W N LiZ N | 2005 | NanoScienceandTechnology2005，，5： | 1 |
| 15 | Study of the In hibition Mechanism of Imidazoline Amide on CO2 Corrosion of Armcoiron 显示文摘 | ZHANGX WANGF HE Y etal | 2011 | Corr Sci2011，43，8： | 1 |
| 16 | Relationofbloodpressurecomponentsandcategoriesandallcause,strokeandcoronaryheartdiseasemortalityinurbanChinesewomen:Apopulation-basedprospectivestudy显示文摘 | DorjgochooT ShuXO ZhangX etal | 2009 | JHypertension2009，27，3： | 1 |
| 17 | Artificial-noise-aidedSecure Multi-antenna Transmission with Limited Feedback显示文摘 | ZHANGX MCKAY M R ZHOU X | 2015 | WirelessCommunications IEEE Transactions on2015，14，5： | 1 |
| 18 | Anovelicesiurry producing system: Producing ice by utilizing inner waste heat 显示文摘 | LiXW ZhangXS CaoRQ FuXZ | 2009 | Energy Conversion and Management2009，50，： | 1 |
| 19 | Prevalenceofprehypertension,hypertensionand,associatedriskfactorsinMongolianandHanChinesepopulationsinNortheastChina显示文摘 | SunZ ZhengL XuC LiJ ZhangX LiuS etal | 2008 | IntJCardiol2008，128，25： | 1 |
| 20 | Facile fabrication of stablesuperhydrophobic Si02/polystyrene coating and separation of liquids withdifferent surface tension显示文摘 | ZhangX Geng T Guo Y G | 2013 | Chemical Engineering Journal2013，231，9： | 1 |
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