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| 1 | New quantum matters:Build up versus high pressure tuning显示文摘In this article we briefly review new quantum functional compounds primarily based on our recent works.We will highlight the effects of pressures on both materials synthesis and quantum tuning.The contents include(I)'111'-type iron based superconducting system,(II)pressure induced superconductivity in topological insulators and(III)the new diluted magnetic semiconductors with decoupled spin charge doping. | JIN ChangQing WANG XianCheng LIU QingQing ZHANG SiJia FENG ShaoMin DENG Zheng YU RiCheng ZHU JingLong | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，12： | 11 |
| 2 | Bacterial Community and Function of Biological Activated Carbon Filter in Drinking Water Treatment显示文摘Objective It aims to investigate the changes in composition and structure of bacterial communities de-veloping on biological activated carbon (BAC) particles, and the bacterial functions. Method A pilot plant had been in service for 180 days, aiming to develop bacterial communities on acti-vated carbon naturally. After 180 days of operation, the bacterial communities were determined by dena-turing gradient gel electrophoresis (DGGE) analyses of PCR-amplified 16S rRNA genes. The study on community composition and the phylogenetic relationships of the organisms was complemented by a se-quence analysis of cloned PCR products from 16S rRNA genes. Gas chromatorgaphy-mass (GC-MS) mea-surement was used to determine organic chemical composition of inflow and outflow water on the 300th day. TOC and NH 4 + -N were also tested in this experiment. Results It showed that the stable bacterial structure did not develop on BAC particles until the 9th month during running time of the BAC filter. The communities were finally dominated by Pseudomonas sp., Ba-cillus sp., Nitrospira sp., and an uncultured bacterium. Stable bacterial communities played an important role in removal of NH 4 + -N and total organic carbon (TOC). Results from gas chromatorgaphy-mass (GC-MS) showed that 36 kinds of chemicals in feed water were eliminated, and concentrations of 5 kinds of chemicals decreased. These chemicals served as nutrients for the dominant bacteria. Conclusion The findings from the study suggested that the stability of microbial structure was beneficial for improving NH 4 + -N and TOC removal efficiencies. The dominant bacteria had the advantage of biode-grading a wide range of organic chemicals and NH 4 + -N. | ZHANG DuoYing LI WeiGuang ZHANG ShuMei LIU Miao ZHAO XiaoYu ZHANG XianCheng | 2011 | Biomedical and Environmental Sciences2011，24，2： | 8 |
| 3 | Diluted ferromagnetic semiconductor(LaCa)(ZnMn)SbO isostructural to “1111” type iron pnictide superconductors显示文摘We report discovery of ferromagnetism in(LaCa)(ZnMn)SbO isostructural to the well-studied iron-based superconductor LaFeAs(O1 xFx).Spin is induced by partial substitution of Mn2+for Zn2+,while charge is induced by substitution of Ca2+for La3+within the parent compound LaZnSbO.Ferromagnetism with Curie temperature(TC)is observed up to 40 K at the spin doping 0.15 by introducing Mn2+into the Zn2+sites for(La0.95Ca0.05)(Zn1 xMnx)SbO.The Hall coefficient measurement indicates p-type carrier for(La0.95Ca0.05)(Zn0.9Mn0.1)SbO with concentration of n^1020cm 3showing anomalous Hall effect below TC. | HAN Wei ZHAO Kan WANG XianCheng LIU QingQing NING FanLong DENG Zheng LIU Ying ZHU JinLong DING Cui MAN HuiYuan JIN ChangQing | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，11： | 8 |
| 4 | Design of aircraft structures against threat of bird strikes显示文摘In this paper, a method to design bird-strike-resistant aircraft structures is presented and illustrated through examples. The focus is on bird strike experiments and simulations. The explicit finite element software PAM-CRASH is employed to conduct bird strike simulations, and a coupled Smooth Particles Hydrodynamic(SPH) and Finite Element(FE) method is used to simulate the interaction between a bird and a target structure. The SPH method is explained, and an SPH bird model is established. Constitutive models for various structural materials, such as aluminum alloys, composite materials, honeycomb, and foam materials that are used in aircraft structures,are presented, and model parameters are identified by conducting various material tests. Good agreements between simulation results and experimental data suggest that the numerical model is capable of predicting the dynamic responses of various aircraft structures under a bird strike,and numerical simulation can be used as a tool to design bird-strike-resistant aircraft structures. | Jun LIU Yulong LI Xiancheng YU Xiaosheng GAO Zongxing LIU | 2018 | Chinese Journal of Aeronautics2018，31，7： | 8 |
| 5 | Effect of Laser Power on the Microstructure and Mechanical Properties of TiN/Ti_3Al Composite Coatings on Ti6Al4V显示文摘Laser nitriding is one of the effective techniques to improve the surface properties of titanium alloys and has potential application in the life extension of last-stage steam turbine blades. However, cracking of surface coating is a common problem due to heat concentration in laser nitriding process. Conventionally, the cracks can be avoided through heat treatment, which may have an important influence on the mechanical properties of coating. Crack-free TiN/Ti3Al IMC coatings on Ti6Al4V are prepared by plasma spraying and laser nitriding. The microstructures, phase constitutes and compositions of the coating are observed and analyzed with scanning electron microscopy(SEM), X-ray diffraction(XRD) and X-ray energy-dispersive spectroscopy(EDS). Microhardness, elastic modulus, fracture toughness of the coating are measured. The results show that the crackand pore-free IMC coatings can be made through the proposed method; with increasing laser power, the amount and density of TiN phase in the coating first increased and then decreased, leading to the similar trend of microhardness and elastic modulus and the reverse trend of fracture toughness of the coating. Both the average microhardness and elastic modulus of the coating increase three times higher than those of the substrate. The volume fraction of the TiN reinforced phase in composite can be controlled by varying the laser power and the cracking problem in laser nitriding process is successfully solved. | LIU Zhengdao ZHANG Xiancheng XUAN Fuzhen WANG Zhengdong TU Shandong | 2013 | Chinese Journal of Mechanical Engineering2013，26，4： | 6 |
| 6 | An Airfoil Parameterization Method for the Representation and Optimization of Wind Turbine Special Airfoil显示文摘A new airfoil shape parameterization method is developed, which extended the Bezier curve to the generalized form with adjustable shape parameters. The local control parameters at airfoil leading and trailing edge regions are enhanced, where have significant effect on the aerodynamic performance of wind turbine. The results show this improved parameterization method has advantages in the fitting characteristics of geometry shape and aerodynamic performance comparing with other three common airfoil parameterization methods. The new parameterization method is then applied to airfoil shape optimization for wind turbine using Genetic Algorithm(GA), and the wind turbine special airfoil, DU93-W-210, is optimized to achieve the favorable Cl/Cd at specified flow conditions. The aerodynamic characteristic of the optimum airfoil is obtained by solving the RANS equations in computational fluid dynamics(CFD) method, and the optimization convergence curves show that the new parameterization method has good convergence rate in less number of generations comparing with other methods. It is concluded that the new method not only has well controllability and completeness in airfoil shape representation and provides more flexibility in expressing the airfoil geometry shape, but also is capable to find efficient and optimal wind turbine airfoil. Additionally, it is shown that a suitable parameterization method is helpful for improving the convergence rate of the optimization algorithm. | LIU Yixiong YANG Ce SONG Xiancheng | 2015 | Journal of Thermal Science2015，24，2： | 6 |
| 7 | A numerical model for bird strike on sidewall structure of an aircraft nose显示文摘In order to examine the potential of using the coupled smooth particles hydrodynamic(SPH) and finite element(FE) method to predict the dynamic responses of aircraft structures in bird strike events, bird-strike tests on the sidewall structure of an aircraft nose are carried out and numerically simulated. The bird is modeled with SPH and described by the Murnaghan equation of state, while the structure is modeled with finite elements. A coupled SPH–FE method is developed to simulate the bird-strike tests and a numerical model is established using a commercial software PAM-CRASH. The bird model shows no signs of instability and correctly modeled the break-up of the bird into particles. Finally the dynamic response such as strains in the skin is simulated and compared with test results, and the simulated deformation and fracture process of the sidewall structure is compared with images recorded by a high speed camera. Good agreement between the simulation results and test data indicates that the coupled SPH–FE method can provide a very powerful tool in predicting the dynamic responses of aircraft structures in events of bird strike. | Liu Jun Li Yulong Gao Xiaosheng Yu Xiancheng | 2014 | Chinese Journal of Aeronautics2014，27，3： | 5 |
| 8 | Post-riser Regeneration Technology in FCC Unit显示文摘In our present work, a post-riser regeneration technology (PRRT) for fluid catalytic cracking (FCC) units was developed to deal with increasingly heavier feedstock and hereby the larger amount of coke deposited on the catalyst particles during reaction. This technology can make full use of the advantages of riser regenerator, such as high coke-burning efficiency and low residual carbon, and at the same time overcome its disadvantages, such as difficulty in starting combustion. The average particles concentration on the cross section of the system was studied on a large scale cold model experimental set-up. Also a necessary software was developed by combining the hydrodynamics research results in our work with the coke-burning kinetics model and the heat and mass transfer model developed by previous researchers. The simulation results showed that the PRRT could increase regeneration capability by 16.28%-26.24% over the conventional turbulent fluidized bed regenerator under the similar operation conditions, and that the residual carbon could be kept below 0.1 wt %. | Liu Xiancheng Lu Chunxi Shi Mingxian | 2007 | Petroleum Science2007，4，2： | 3 |
| 9 | Fast and dynamic generation of linear octrees for geological bodies under hardware acceleration显示文摘In the application of 3D Geoscience Modeling,we often need to generate the volumetric representations of geological bodies from their surface representations.Linear octree,as an efficient and easily operated volumetric model,is widely used in 3D Geoscience Modeling.This paper proposes an algorithm for fast and dynamic generation of linear octrees of geological bodies from their surface models under hardware acceleration.The Z-buffers are used to determine the attributes of octants and voxels in a fast way,and a divide-and-conquer strategy is adopted.A stack structure is exploited to record the subdivision,which allows generating linear octrees dynamically.The algorithm avoids large-scale sorting process and bypasses the compression in linear octrees generation.Experimental results indicate its high efficiency in generating linear octrees for large-scale geologic bodies. | DENG Hao ZHANG LiQiang MAO XianCheng MA JingTao KANG ZhiZhong PENG JunHuan RUI XiaoPing LIU Liu | 2010 | Science China Earth Sciences2010，53，1： | 2 |
| 10 | Gravitational effects on global hemodynamics in different postures:A closed-loop multiscale mathematical analysis显示文摘We present a novel methodology and strategy to predict pressures and flow rates in the global cardiovascular network in different postures varying from supine to upright. A closed-loop, multiscale mathematical model of the entire cardiovascular system(CVS) is developed through an integration of one-dimensional(1D) modeling of the large systemic arteries and veins, and zero-dimensional(0D) lumped-parameter modeling of the heart, the cardiacpulmonary circulation, the cardiac and venous valves, as well as the microcirculation. A versatile junction model is proposed and incorporated into the 1D model to cope with splitting and/or merging flows across a multibranched junction, which is validated to be capable of estimating both subcritical and supercritical flows while ensuring the mass conservation and total pressure continuity. To model gravitational effects on global hemodynamics during postural change, a robust venous valve model is further established for the 1D venous flows and distributed throughout the entire venous network with consideration of its anatomically realistic numbers and locations. The present integrated model is proven to enable reasonable prediction of pressure and flow rate waveforms associated with cardiopulmonary circulation, systemic circulation in arteries and veins, as well as microcirculation within normal physiological ranges, partic-ularly in mean venous pressures, which well match the in vivo measurements. Applications of the cardiovascular model at different postures demonstrate that gravity exerts remarkable influence on arterial and venous pressures, venous returns and cardiac outputs whereas venous pressures below the heart level show a specific correlation between central venous and hydrostatic pressures in right atrium and veins. | Xiancheng Zhang Shigeho Noda Ryutaro Himeno Hao Liu | 2017 | Acta Mechanica Sinica2017，33，3： | 2 |
| 11 | Active and passive compliant force control of ultrasonic surface rolling process on a curved surface显示文摘Ultrasonic surface rolling process(USRP)is one of the effective mechanical surface enhancement techniques.During the USRP,unstable static force will easily do harm to the surface quality.In order to achieve a higher surface quality on the part with a curved surface,an active and passive compliant USRP system has been developed.The compliant USRP tool can produce the natural obedience deformation along the part surface.Force control based on the fuzzy Proportional-integral-derivative(PID)method is then designed to maintain the static force during the USRP.Experiments have been performed on a real aero-engine blade with curved surface.It is proved that the deigned active and passive compliant USRP system can significantly reduce the force variation from 42.2 N to 4.2 N,and achieve a uniform surface quality after processing. | Kaiming ZHANG Ji WANG Yixin LIU Shuang LIU Xiancheng ZHANG | 2022 | Chinese Journal of Aeronautics2022，35，7： | 1 |
| 12 | Induced seismicity at wujiangdu reservoir, China: a case induced in the karst area显示文摘 | Hu Yuliang Liu Zuyuan Yang Oingyuan Chen Xiancheng Hu Ping Ma Wentao Lei Jun | 1996 | Pure and Applied Geophysics PAGEOPH1996，，2： | 1 |
| 13 | Two-sided ultrasonic surface rolling process of aeroengine blades based on on-machine noncontact measurement显示文摘As crucial parts of an aeroengine,blades are vulnerable to damage from long-term operation in harsh environments.The ultrasonic surface rolling process(USRP)is a novel surface treatment technique that can highly improve the mechanical behavior of blades.During secondary machining,the nominal blade model cannot be used for secondary machining path generation due to the deviation between the actual and nominal blades.The clamping error of the blade also affects the precision of secondary machining.This study presents a two-sided USRP(TS-USRP)machining for aeroengine blades on the basis of on-machine noncontact measurement.First,a TS-USRP machining system for blade is developed.Second,a 3D scanning system is used to obtain the point cloud of the blade,and a series of point cloud processing steps is performed.A local point cloud automatic extraction algorithm is introduced to extract the point cloud of the strengthened region of the blade.Then,the tool path is designed on the basis of the extracted point cloud.Finally,an experiment is conducted on an actual blade,with results showing that the proposed method is effective and efficient. | Shulei YAO Xian CAO Shuang LIU Congyang GONG Kaiming ZHANG Chengcheng ZHANG Xiancheng ZHANG | 2020 | Frontiers of Mechanical Engineering2020，15，2： | 1 |
| 14 | Integration of interlayer surface enhancement technologies into metal additive manufacturing:A review显示文摘Additive manufacturing(AM)has the advantages of rapid prototyping,high design freedom,and flexible manufacturing,while the mechanical properties of additively manufactured products are not uniform due to inherent defects and residual stresses.Integration of interlayer surface enhancement(SE)technologies into AM is a potential solution to improve the microstructure,close defects,residual stress state,mechanical properties,and chemical properties of formed materials.This paper reviews the current literature on hybrid AM process through the combination of SE and AM,and proves the possibility of integrating SE technologies into AM from the technical level.Then the improvement effects of SE processes on AM parts are introduced in terms of microstructure,defects,residual stress,mechanical properties,and chemical properties.Finally,considering the commonly used directed energy deposition(DED)process and ultrasonic impact treatment(UIT),a closed-loop quality control framework for integration of interlayer UIT into the DED process is proposed.Future research directions to the hybrid AM and interlayer SE are pointed out. | Yufei Chen Xiancheng Zhang Donghong Ding Xiaowei Wang Kaiming Zhang Yixin Liu Tiwen Lu Shantung Tu | 2023 | Journal of Materials Science & Technology2023，，34： | 0 |
| 15 | Optimization of Protective Agent Formulation for Soybean Rhizobium Strain HW-05 by Response Surface Methodology显示文摘[Objective] T his study aimed to investigate the protective effects of proteins,salts,sugars and trace elements on soybean rhizobium strain HW-05 by response surface methodology. [Method]Different types,combinations,ratios and concentrations of protective agents were designed. Under simulated conditions,the optimal protective agent formulation was screened for improving the survival rate and survival time of soybean rhizobium strain HW-05. The optimal combination of significant factors was determined by Box-Behnken central composite design. [Result] T hree significant factors affecting effective number of viable cells were screened,including peptone,xanthan gum and Na Cl. The final concentration of each compound was optimized: 0. 13% peptone,0. 011% xanthan gum,0. 30%Na Cl. [Conclusion] After addition of protective agent and preservation at room temperature for six months,effective number of viable cells of soybean rhizobium strain HW-05 reached 3.185 × 10~8 CFU / ml. The survival rate of HW-05 cells was improved by more than 25% compared with the control group(2.458×10~8 CFU / ml). | Tao ZHEN Wei CHEN Changqing SHA Xiancheng ZHANG Xinjie LIU Deshui YU | 2016 | Agricultural Biotechnology2016，5，4： | 0 |
| 16 | Circumventing chemo-mechanical failure of Sn foil battery anode by grain refinement and elaborate porosity design显示文摘Tin (Sn) metal foil is a promising anode for next-generation high-energy–density lithium-ion batteries (LIBs) due to its high capacity and easy processibility. However, the pristine Sn foil anode suffers nonuniform alloying/dealloying reaction with lithium (Li) and huge volume variation, leading to electrode pulverization and inferior electrochemical performance. Herein, we proposed that reduced grain size and elaborate porosity design of Sn foil can circumvent the nonuniform alloy reaction and buffer the volume change during the lithiation/delithiation cycling. Experimentally, we designed a three-dimensional interconnected porous Sn (3DIP-Sn) foil by a facile chemical alloying/dealloying approach, which showed improved electrochemical performance. The enhanced structure stability of the as-fabricated 3DIP-Sn foil was verified by chemo-mechanical simulations and experimental investigation. As expected, the 3DIP-Sn foil anode revealed a long cycle lifespan of 4400 h at 0.5 mA cm^(−2) and 1 mAh cm^(−2) in Sn||Li half cells. A 3DIP-Sn||LiFePO_(4) full cell with LiFePO_(4) loading of 7.1 mg cm^(−2) exhibited stable cycling for 500 cycles with 80% capacity retention at 70 mA g^(−1). Pairing with high-loading commercial LiNi0.6Co0.2Mn0.2O_(2) (NCM622, 18.4 mg cm^(−2)) cathode, a 3DIP-Sn||NCM622 full cell delivered a high reversible capacity of 3.2 mAh cm^(−2). These results demonstrated the important role of regulating the uniform alloying/dealloying reaction and circumventing the localized strain/stress in improving the electrochemical performance of Sn foil anodes for advanced LIBs. | Shuibin Tu Xin Ai Xiancheng Wang Siwei Gui Zhao Cai Renming Zhan Yuchen Tan Weiwei Liu Hui Yang Chenhui Li Yongming Sun | 2021 | Journal of Energy Chemistry2021，30，11： | 0 |
| 17 | Ding Family Mansion: A Masterpiece of Hakka Architecture显示文摘The Hakka are a subgroup of the Han Chinese people. Their ancestors are said to have migrated from central China due to famines and wars and settled in Fujian, Jiangxi and Canton in southern China. Several hundred years ago, Hakka settlers in southern China again migrated overseas to various continents around the globe. | liu Xiancheng | 2008 | China & The World Cultural Exchange2008，74，6： | 0 |
| 18 | Gas-solids separation model of a novel FCC riser terminator device: super short quick separator (SSQS)显示文摘The gas flow field and the separation efficiency of a novel fluid catalytic cracking (FCC) riser terminal device, named as Super Short Quick Separator (SSQS), were studied. On the basis of above investigations, a section-lateral-mixing separation model was proposed, which included both the effect of inertia and structure of gas outlet on particles capture. After final modification, the results predicted with this model could be in good agreement with the cold experimental data. According to this model, the separation efficiency of SSQS is mainly influenced by the difference between the arc radius and the center pipe radius as well as the magnitude of particle tangential velocity. | Chunxi LU Ruxin LI Xiancheng LIU Mingxian SHI | 2008 | Frontiers of Chemical Science and Engineering2008，2，4： | 0 |
| 19 | In situ magnetometry study on the origin of anomalously capacity in transition metal sulfides显示文摘Cobalt sulfides are considered as promising candidates for lithium-ion battery(LIB)anode materials with high energy densities.Their energy storage mechanism is widely understood to involve the traditional intercalation and conversion reaction.However,these conventional mechanisms are unable to explain the storage capacities of certain materials which exceed the theoretical limit.Here,utilizing advanced in situ magnetometry to detect the magnetization evolution of Co_(1-x) S LIBs in real time,it is demonstrated that the Co-catalytic lithium storage process and interfacial space charge storage mechanism are strongly related to the additional capacity of cobalt sulfides.During discharge,a Co/Li_(2) S interface is formed,wherein the Co nanoparticles and Li_(2) S could store a large amount of polarized electrons Li^(+),respectively.Subsequently,the electrons stored in Co are transferred to the polymeric film,forming radical anions and contributing extra capacity.These findings reveal the charge storage mechanisms of transition metal sulfides and highlight the critical role of magnetic testing in the investigation of energy storage mechanisms. | Yan Liu Yuanyuan Han Shuxuan Liao Fangchao Gu Hengjun Liu Xixiang Xu Zhiqiang Zhao Xiancheng Sang Qinghao Li Weijin Kong Qiang Li | 2023 | ChemPhysMater2023，2，3： | 0 |
| 20 | Superconducting properties of “111” type LiFeAs iron arsenide single crystals显示文摘LiFeAs single crystal has been grown with superconducting transition temperature Tc comparable to that of polycrystals.A magnetic transition is found at about 160 K,which suggests the correlation of superconductivity with spin wave density. | XianCheng Wang QingQing Liu YuXi Lv Zheng Deng Kan Zhao RiCheng Yu JinLong Zhu ChangQing Jin | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，7： | 0 |
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