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Particuology 2010年第3期8卷 257-261页

作者： Donghong Li jianxin zhou Xiangqian Shen Wei Liu School of Materials Science and Engineering Jiangsu University Zhenjiang 212013 Chinab Zhengzhou Research Institute of Chalco Zhengzhou 450041 China Zhengzhou Research Institute o f Chalco Zhengzhou 450041 China

Precursors with NiCO3-2Ni（OH）2.2H2O- and ***20-coated alumina, graphite and cenosphere were synthesized by precipitation using ferrous sulfate, nickel sulfate, ammonium bicarbonate, alumina, graphite and cenosphere as the main starting materials. Magnetic γ-FeNi-coated alumina, graphite and cenosphere core-shell structural microspheres were subsequently prepared by thermal reduction of the as-prepared precursors at 600℃ for 2 h. Precipitation parameters, e.g. concentration of ceramic micropowders （lOg/L）, sulfate solution （0.2mol/L）, rate of adding reactants （3 mL/min） and pH value were optimized by a trial-and-error method. Powders of the precursors and the resulting coating of γ-FeNi with grain size below 40 nm on alumina, graphite and cenosphere microspheres were characterized by scanning electron microscopy （SEM）, energy dispersive spectroscopy （EDS） and X-ray diffraction （XRD）. The magnetic properties of the nanosize γ-FeNi-coated alumina, graphite and cenosphere microspheres were measured by vibrating sample magnetometer （VSM）. The results show that the core-shell structural γ-FeNi-coated ceramic microspheres exhibited higher coercivity than pure γ-FeNi powders, indicating that these materials can be used for high-Derformance functional materials and devices.

关键词： Heterogeneous precipitation Core-shell structure γ-FeNi-coated Magnetic property

Synthesis and electrochemical performances of spherical LiFePO_4 cathode materials for Li-ion batteries

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Rare Metals 2006年第z1期25卷 19-24页

作者： zhou jianxin SHEN Xiangqian JING Maoxiang ZHAN Yun School of Materials Science and Engineering Jiangsu University Zhenjiang 212013 China School of Materials Science and Engineering Jiangsu University Zhenjiang 212013 China School of Materials Science and Engineering Jiangsu University Zhenjiang 212013 China School of Materials Science and Engineering Jiangsu University Zhenjiang 212013 China

Spherical LiFePO4 and LiFePO4/C composite powders for lithium ion batteries were synthesized by a novel processing route of co-precipitation and subsequent calcinations in a nitrogen and hydrogen atmosphere. The precursors of LiFePO4, LiFePO4/C composite and the resultant products were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and the electrochemical performances were investigated by galvanostatic charge and discharge tests. The precursors composed of amorphous Fe3(PO4)2·xH2O and crystalline Li3PO4 obtained in the co-precipitation processing have a sphere-like morphology. The spherical LiFePO4 derived from the calcinations of the precursor at 700 ℃ for 10 h in a reduction atmosphere shows a discharge capacity of 119 mAh·g-1 at the C/10 rate, while the LiFePO4/C composite with 10wt.% carbon addition exhibits a discharge capacity of 140 mAh·g-1. The electrochemical performances indicate that the LiFePO4/C composite has a higher specific capacity and a more stable cycling performance than the bare olivine LiFePO4 due to the carbon addition enhancing the electronic conductivity.

关键词： spherical LiFePO4 LiFePO4/C composite co-precipitation cathode material Li-ion battery

Aligned Ni nanowires towards highly stretchable electrode

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Science China(Technological Sciences) 2020年第10期63卷 2131-2136页

作者： LI JiDong NIU JiYuan LI XueMei zhou jianxin HU ZhiLi GUO WanLin State Key Laboratory of Mechanics and Control of Mechanical Structures The Key Laboratory of Intelligent Nano Materials and Devices of DoEInstitute of Nano Science of Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Easy fabrication of super-stretchable electrodes can pave the way for smart and wearable *** drop casting unidirectional nickel nanowires with polyurethane matrix,we fabricated a super-stretchable film with high electric *** as-fabricated film can withstand a 300%tensile strain in the direction perpendicular to nanowires,owing to the transformation of percolating nanowire network from 2D to *** contrast to the decreased film conductivities under large tension in most stretchable electrodes,which usually associate with fractures and irreversible deformations,our film conductivity can increase with the applied *** probably benefits from the enhanced electrical contacts between twisted nanowires under *** developed super-stretchable film with unprecedented behavior in this work sheds light on the facile fabrication of super-stretchable electrodes with durable performance.

关键词： nickel nanowire stretchable electrode polyurethane matrix three-dimensional network alignment

Hepatorenal syndrome in acute-on-chronic liver failure with acute kidney injury:more questions requiring discussion

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Gastroenterology Report 2021年第6期9卷 505-520页

作者： Songtao Liu Qinghua Meng Yuan Xu jianxin zhou Department of Critical Care Medicine Beijing Tiantan HospitalCapital Medical UniversityBeijingP.R.China Department of Severe Liver Disease Beijing You’an HospitalCapital Medical UniversityBeijingP.R.China Department of Critical Care Medicine Beijing Tsinghua Chang Gung HospitalBeijingP.R.China

In cirrhosis with ascites,hepatorenal syndrome(HRS)is a specific prerenal dysfunction unresponsive to fluid volume ***-on-chronic liver failure(ACLF)comprises a group of clinical syndromes with multiple organ failure and early high *** are differences in the characterization of ACLF between the Eastern and Western medical *** with ACLF and acute kidney injury(AKI)have more structural injuries,contributing to confusion in diagnosing *** this review,we discuss progress in the pathogenesis,diagnosis,and management of HRS-AKI,especially in patients with *** regarding HRS-AKI in ACLF and acute liver failure,hepatic carcinoma,shock,sepsis,and chronic kidney disease is also *** on the treatment of HRS-AKI with ACLF needs to be more actively pursued to improve disease prognosis.

关键词： hepatorenal syndrome acute-on-chronic liver failure acute kidney injury review

Downward continuation of aeromagnetic data to the marine surface

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Acta Oceanologica Sinica 2008年第1期27卷 54-60页

作者： XU Shizhe WANG Rui zhou jianxin XIAO Pengfei CHEN Shengchang Department of Earth Sciences Zhejiang University Hangzhou 310027 China Department of Navigation Guarantee Navy Headquarters Chinese People＇s Libration Army Tianjing 300042 China China Aero-geophysieal Survey and Remote Sensing Center for Land and Natural Resource Beijing 100083 China School of Geophysics and Information Technology China University of Geosciences Beijing 100083 China

The existing methods of downward continuation of potential field cannot be used to continue the aeromagnetic data to the marine surface because of the limited continuation distance. An iteration method for the downward continuation of potential field with a much larger continuation distance has been developed, which can continue the aeromagnetic data to the marine surface and get the marine - magnetic chart with the same scale as the aeromagnetic data. This downward continuation method will greatly raise the ef- ficiency of marine - magnetic investigation. The principle of the iteration method is presented. The method is demonstrated on synthetic models and real aeromagnetic data. Also, the error brought by continuation is discussed. The efficiency of the iteration method for the downward continuation of potential field is compared with the fast fourier transform （FFT） method, the former is much better than the latter.

关键词： aeromagnetic marine-magnetic downward continuation of potential field iteration method fast fourier transform

Study of Residual Basin and Tectonolayering Based on Airborne Gravity and Magnetic Data

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Acta Geologica Sinica(English Edition) 2013年第4期87卷 1137-1153页

作者： LI Wenyong zhou jianxin XIONG Shengqing LIU Yanxu XU Jianchun China Aero Geophysical Survey and Remote Sensing Center for Land and Resources

This paper takes the South Yellow Sea as an example to show a new method for comprehensive geological-geophysical research such as residual basin and tectonolayering using airborne gravity and magnetic data in China. Based on airborne gravity and magnetic data, by measuring and analyzing stratigraphic density and susceptibility, the depths to the pre-Sinian magnetic basement top, the pre-Jurassic top and the Cenozoic bottom, are obtained by forward and inverse methods constrained by seismic and drilling data; and furthermore, the residual thicknesses of the Sinian-Triassic, the Jurassic-Cretaceous and the Cenozoic are calculated. Based on airborne gravity and magnetic anomalies, the faults in the pre-Sinian magnetic basement, the Jurassic-Cretaceous and the Cenozoic are respectively interpreted by the qualitative and quantitative methods. On the basis of the above study, and combining regional important tectonic events, four tectonolayers are divided in the vertical succession in South Yellow Sea, namely the pre-Sinian magnetic basement, the Sinian-Triassic, the Jurassic-Cretaceous and the Cenozoic. The result shows that there are thick Cenozoic and Jurassic-Cretaceous strata and thin residual Sinian-Triassic strata in the Suzhong-Huangnan depression area, but there are thin or only sporadic Mesozoic-Cenozoic terrestrial strata and thick Sinian-Triassic marine strata reserved in Subei-Huangzhong uplift area and Sunan-Wunansha uplift area. The four tectonolayers are very different in structures as well as distributions in plane.

关键词： airborne gravity and magnetics comprehensive interpretation residual basin,tectonolayering South Yellow Sea

Kinetic Study of SiO_2/S Coating Deposition by APCVD

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Journal of Materials Science & Technology 2007年第4期23卷 535-540页

作者： jianxin zhou Hong XU Li ZHANG Jinglei LIU Xuegui QI Bo PENG State Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai 200237 China

To alleviate catalytic coking on the inner surface of radiant tube for ethylene production in petrochemical plants,SiO2/S coatings were deposited on HP40 alloy specimens using dimethyldisulfide （DMDS） and tetraethoxysilane （TEOS） by atmospheric pressure chemical vapor deposition （APCVD）. A two-dimension mathematical model was made to predict the growth rate of SiO2/S coating and to study the effects of deposition parameters on the deposition rate. The results show that the predicted deposition rate is in good agreement with the experimental one. The deposition rate mainly depends on the concentrations of precursors in the total gas flow, concentrations of intermediates on the deposition surface, total gas flow rate and deposition temperature. The weight of SiO2/S coating linearly increases with the deposition time. When the gas flow rate is below 0.3 m/s, the rate-limiting step of SiO2/S coating deposition is the diffusions of ***, the surface reactions of intermediates will be the rate-limiting step after the gas flow rate is above 0.3 m/s. When the deposition temperature is below 780℃, the rate-limiting step of SiO2/S coating deposition mainly depends on the surface reactions of intermediates. When the deposition temperature is above 780℃,the rate-limiting step depends on the diffusions of intermediates. The deposition rate increases with increasing the concentrations of the intermediates. However, when the partial pressures of the intermediates reach 8 Pa,the deposition rate keeps constant.

关键词： APCVD SiO2/S coating Mathematical model HP40 steel Kinetics

A study on fast post-processing massive data of casting numerical simulation on personal computers

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China Foundry 2013年第5期10卷 321-324页

作者： Chen Tao Liao Dunming Pang Shenyong zhou jianxin State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science and Technology

When castings become complicated and the demands for precision of numerical simulation become higher,the numerical data of casting numerical simulation become more *** a general personal computer,these massive numerical data may probably exceed the capacity of available memory,resulting in failure of *** on the out-of-core technique,this paper proposes a method to effectively utilize external storage and reduce memory usage dramatically,so as to solve the problem of insufficient memory for massive data rendering on general personal *** on this method,a new postprocessor is *** is capable to illustrate filling and solidification processes of casting,as well as thermal *** new post-processor also provides fast interaction to simulation *** analysis as well as several practical examples prove that the memory usage and loading time of the post-processor are independent of the size of the relevant files,but the proportion of the number of cells on ***,the speed of rendering and fetching of value from the mouse is appreciable,and the demands of real-time and interaction are satisfied.

关键词： casting numerical simulation massive data fast post-processing

Development of 2D casting process CAD system based on PDF/image files

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China Foundry 2014年第5期11卷 440-446页

作者： Tang Hongtao zhou jianxin Wang Lin Liao Dunming Tao Qing School of Mechanical and Electronic Engineering Wuhan University of Technology State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science & Technology

A casting process CAD is put forward to design and draw casting process. The 2D casting process CAD, most of the current systems are developed based on one certain version of the AutoCAD system. However the application of these 2D casting process CAD systems in foundry enterprises are restricted because they have several deficiencies, such as being overly dependent on the AutoCAD system, and some part files based on PDF format can not be opened directly. To overcome these deficiencies, for the first time an innovative 2D casting process CAD system based on PDF and image format file has been proposed, which breaks through the traditional research and application notion of the 2D casting process CAD system based on AutoCAD. Several key technologies of this system such as coordinate transformation, CAD interactive drawing, file storage, PDF and image format files display, and image recognition technologies were described in detail. A practical 2D CAD casting process system named HZCAD2D（PDF） was developed, which is capable of designing and drawing the casting process on the part drawing based on the PDF format directly, without spending time on drawing the part produced by AutoCAD system. Final y, taking two actual castings as examples, the casting processes were drawn using this system, demonstrating that this system can significantly shorten the cycle of casting process designing.

关键词： 2D casting process CAD casting process PDF format development of 2D CAD storage of file

Cellulose membranes as moisture-driven actuators with predetermined deformations and high load uptake

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International Journal of Smart and Nano Materials 2021年第2期12卷 146-156页

作者： Xiaofeng Jiang Bingkun Tian Xiaoyu Xuan Wanqi zhou jianxin zhou Yaqing Chen Yang Lu Zhuhua Zhang Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education State Key Laboratory of Mechanics and Control of Mechanical Structuresand Institute of NanoscienceNanjing University of Aeronautics and AstronauticsNanjingJiangsuChina Department of Mechanical Engineering City University of Hong KongKowloonHong KongSAR 999077China

We report the synthesis of cellulose membranes from balsa wood with an exceptionally high responsivity to humidity change by chemical processing and mechanical *** varying the ambient humidity,the produced cellulose membranes can provide a variety of predetermined deformations,such as curve,s-like deformation and *** high humidity responsivity is originated from a self-maintained moisture gradient induced by an asymmetrical design of membrane surfaces,aided by the hygroscopic swelling of the *** moisture-driven actuators are then demonstrated as a three-finger gripper that can grab,hold and release objects 40 times the weight of its *** combination of natural wood and stimuli-responsive behavior open a way to designing smart structures,actuators and soft robots with environmentally friendly,recyclable and biocompatible materials.

关键词： Cellulose membrane actuator wood relative humidity energy conversion