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| 1 | Control strategy of a novel electric power steering system integrated with active front steering function显示文摘A novel electric power steering system(EPS) integrated with active front steering(AFS) is developed.It has functions of both AFS system and EPS system with two actuator units:the AFS actuator unit and the EPS actuator unit.The AFS actuator unit controls the displacement transfer behavior of the steering system,and improves the handling stability under adverse road conditions by varying the steering ratio directly related to the speed and road conditions.The EPS actuator unit controls the force transfer behavior of the steering system,and improves the steering portability and road feel of the vehicle.Based on a dynamic model,the mixed H2/H∞ control strategy of the EPS actuator and the active steering intervention control strategy of the AFS actuator are designed.The simulation indicates that the novel EPS system with the designed control strategies has obvious advantages in vehicle handling stability and the driver's road feel over the traditional EPS system,and extends the vehicle's steering performance. | ZHAO WanZhong LIN Yi WEI JianWei SHI GuoBiao | 2011 | Science China(Technological Sciences)2011，54，6： | 25 |
| 2 | Discovery of Paleogene marine stratum along the southern side of Yarlung-Zangbo suture zone and its implications in tectonics显示文摘The Jiachala Formatiom is a new lithostratigraphic unit set up in this paper. This is the first report on the Paleogene marine sequences and microfaunas in Gyangze to the southern side of the Yarlung-Zangbo suture zone. On the basis of fossil abundance, species diversity, dominant species and first and last occurrences of key species, three dinoflagellate assemblages and three polynological assemblages were recognized in the Jiachala Formatiom. They are in ascending order as follows: Apectodinium quinquelatum-Apectodinium hyperacanthum, Cannin- gia chinensis-Palaeoperidinium pyrophorum and Cymatiosphaera reticulosa-Samlandia chla- mydophora dinoflagellate assemblages, and Arliaceoipollenites baculatus-Anacolosidites sub- trudens, Aglaoreidia cyclops-Pinuspollenites microinsigis, and Elaeangnacites asper-Ilexpol- lenites iliacus polynological Assemblages. According to the assemblages, the age of the Jiachala Formation is referred to Paleocene-early Eocene. The preliminary study on the Jiachala Forma- tion shows that this group of Paleogene deposits accumulated in an underfilled peripheral fore- land basin which was in response to the load of the crust thickening resulted from the Asia-India collision. The stratigraphic evidences provided by the evolution of foreland basin indicate that the India-Asia initional collision should occure near the Cretaceous/Paleogene boundary. The de- velopment and evolution of the southern Tibet foreland basin was under the control of the stress field from the subduct-collision between India and Asia and the structure pattern of the basement. The withering of Tethys Sea might occur after early Eocene in the Gyangze basin and should be after Priabonian of late Eocene in southern Tibet. | LI Guobiao 1 , WAN Xiaoqiao 1 , LIU Wencan 1 , LIANG Dingyi 1 & Hyesu Yun 2 1. China University of Geosciences, Beijing 100083, China 2. Chungnam National University, Daejon, 305-350, Korea | 2005 | Science China Earth Sciences2005，48，5： | 21 |
| 3 | Planktic Foraminiferal Biostratigraphy of the Cretaceous Oceanic Red Beds in Kangmar,Southern Tibet,China显示文摘Chuangde 形成的 planktic 有孔虫类(上面的白垩纪海洋的红床, CORB ) 是在 Tianbadong 节暴露了, Kangmar,南部的西藏第一被学习了为一为详细 biostratigraphy 详尽阐述详细说明了。一个富有、保存得很好的 planktic 有孔虫类从 Tianbadong 节和 Globotruncanita 的 Chuangde 形成被恢复 elevata, Globotruncana ventricosa, Radotruncana calcarata, Globotruncanella havanensis, Globotruncana aegyptiaca, Gansserina gansseri 和 Abathomphalus mayaroensis 地区被认出了。到到 Maastrichitian 的早 Campanian 的有孔虫目的集合点为东方北方 Tethyan 喜玛拉雅的亚带的 CORB 变老的 planktic,它也提供印度板的变的进步的更好的理解给北方和 Neotethyan 海洋的进化。Tianbadong 节的 Chuangde 形成的岩石层位学包括在登上继任观察的二个 lithological 序列:一个更低的单位(页岩成员) 主要紫色创作了(樱桃红,紫红) 有 interbedded siltstones 的页岩和硅质的岩石;并且上面的联合起来(石灰石成员) 使成杂色的石灰石。在 Tianbadong 节的 Chuangde 形成的阶层类似于在亚洲的北 Tethyan Himalaya 区域的另外的部分的 CORB (Gyangze, Sa'gya, Sangdanlin,北 Zanskar,等等) 。在学习的节(CORB ) 的 Chuangde 形成的石块内容北 Tethyan 喜玛拉雅的亚带和南部的 Tethyan 喜玛拉雅的亚带的上面的白垩纪为那些提供与带状配列计划的关联的一个工具。为迟了的白垩纪的 Paleogeographic 重建显示上面的白垩纪 Chuangde 形成(CORB ) 和在北 Zanskar 的 correlatable 阶层到 basinal 存款的斜坡是代表性的,它位于北 Tethyan 带。在 Spiti 和位于在对比的南部的 Tethyan 带的 Gamba 的 Correlatable 白垩纪阶层沿着 Tethyan 喜玛拉雅的被动边缘在架环境被扔。CORB 被 Fe (II )-enriched, 的氧化很可能形成分开了 oxic 的 chemocline 附近的缺氧的深海洋水海洋的表面从缺氧。 | LI Guobiao WAN Xiaoqiao PAN Mao | 2011 | Acta Geologica Sinica(English Edition)2011，85，6： | 12 |
| 4 | Numerical analysis of fuel regression rate distribution characteristics in hybrid rocket motors with different fuel types显示文摘This paper presents three-dimensional numerical simulations of the hybrid rocket motor with hydrogen peroxide (HP) and hy-droxyl terminated polybutadiene (HTPB) propellant combination and investigates the fuel regression rate distribution charac-teristics of different fuel types. The numerical models are established to couple the Navier-Stokes equations with turbulence,chemical reactions, solid fuel pyrolysis and solid-gas interfacial boundary conditions. Simulation results including the temper-ature contours and fuel regression rate distributions are presented for the tube, star and wagon wheel grains. The results demonstrate that the changing trends of the regression rate along the axis are similar for all kinds of fuel types, which decrease sharply near the leading edges of the fuels and then gradually increase with increasing axial locations. The regression rates of the star and wagon wheel grains show apparent three-dimensional characteristics, and they are higher in the regions of fuel surfaces near the central core oxidizer flow. The average regression rates increase as the oxidizer mass fluxes rise for all of the fuel types. However, under same oxidizer mass flux, the average regression rates of the star and wagon wheel grains are much larger than that of the tube grain due to their lower hydraulic diameters. | LI XinTian TIAN Hui CAI GuoBiao | 2013 | Science China(Technological Sciences)2013，56，7： | 11 |
| 5 | Large-scale Vacuum Vessel Design and Finite Element Analysis显示文摘The vacuum plume effects experimental system (PES) is the first experimental system designed to study the effects of vacuum plume in China. The main equipment, a vacuum chamber of 5.5 m in diameter and 12.8 m in length, and structure design of hinged door are described. The finite element method (FEM) is adopted to analyze the static strength and stability of the PES vacuum chamber. It is demonstrated that the static strength and stability are qualified. For the 5.5 m diameter vacuum chamber door, three design schemes are put forward. After comparisons are made, the single-axis-double-pin hinged door is selected. The FEM is applied to checking its static strength as well as distortions. The results show that the door's distortion and displacement change mainly due to the gravity of the door which leads to its sinking. The calculated displacement is less than 7.8 mm, while the actual measurement is 5 mm. The single-axis-double-pin hinged door mechanism completely satisfies the design requirements. This innovative structure can be introduced as a reference for the design of large-scale hinged doors. | WANG Wenlong CAI Guobiao ZHOU Jianping | 2012 | Chinese Journal of Aeronautics2012，25，2： | 10 |
| 6 | Tracking Performance of Electric Power Steering System Based on the Mixed H_2/H_∞ Strategy显示文摘The tracking performance of motor current is an important factor that affects the assistance torque of electric power steering (EPS) system. Bad tracking performance will cause assistant torque delay, and make road feeling bad, and is influenced by the input steering torque and system measuring noise. However the existing methods have some shortages on system's robust dynamic performance and robust stability. The mixed H2/H∞ strategy for recirculating ball-type EPS system in a pure electric bus is proposed, and vehicle dynamic model of the system is established. Due to the existence of system model uncertainty, disturbance signals, sensor noises and the demand of system dynamic performance, the indexes of robust performance and road feeling for drivers are defined as the appraisal control objectives. The H∞ method is introduced to design the H∞ controller, and the H2 method is applied to optimize the H∞ controller, thus the mixed H2/H∞ controller is designed. The response of EPS system to the motor current command with amplitude of 20 A, the road disturbance with amplitude of 500 N and the sensor random noise with the amplitude of 1 A is simulated. The simulation results show that the recirculating ball-type EPS system with the mixed H2/H∞ controller can attenuate the random noises and disturbances and track the boost curve well, so the mixed H2/H∞ controller can improve the system's robust performance and dynamic performance. For the purpose of verifying the performance of the designed control strategy, the motor current tracking performance ground tests are conducted with step response input of the steering wheel, double-lane steering test and lemniscate steering test, respectively. The tests show that the mixed H2/H∞ controller for the recirculating ball-type EPS system of pure electric bus is feasible. The designed controller can solve the robust performance and robust stability of the system, thus improve the tracking performance of the EPS system and provide satisfied road feeling for the drivers. | ZHAO Wanzhong SHI Guobiao LIN Yi NIE Hong | 2011 | Chinese Journal of Mechanical Engineering2011，24，4： | 10 |
| 7 | Plume aerodynamic effects of cushion engine in lunar landing显示文摘During the second period of China 'Tanyue' Project, the explorer will softland on the moon. The cushion engines are used to decelerate the explorer and reduce the impact on the lunar ground. It is necessary to study its plume effects on the explorer component. The self-developed PWS (Plume WorkStation) software based on direct simulation Monte Carlo (DSMC) method is used to simulate the plume effects of two 150 N engines. Due to the complex structure of the explorer, PWS uses a decoupling method to treat the boundary mesh, which mainly interacts with simulation particles, and has no relation with the computational grids. After the analytical expressions of plane surfaces and curved surfaces of each boundary block are given, the particle position within or without the boundary blocks can be easily determined. Finally the 3D plume field of two 150 N engines is simulated. The pressure, temperature and velocity distributions of plume field are clearly presented by three characteristic slices. The aerodynamic effects on the explorer bottom, the landfall legs and antenna are separately shown. The compression influence on the plume flow of four landfall legs can be observed. | He Bijiao He Xiaoying Zhang Mingxing Cai Guobiao | 2013 | Chinese Journal of Aeronautics2013，26，2： | 9 |
| 8 | Numerical and experimental investigation on the effects of aft mixing chamber diaphragm in hybrid rocket motor显示文摘This paper focuses on the investigation of an aft mixing chamber diaphragm in a hybrid rocket motor.Both numerical and experimental researches are carried out to study its effects on the motor performances.The hybrid rocket motor with star fuel grain is utilized.The 90%hydrogen peroxide(HP)oxidizer and hydroxyl terminated polybutadiene(HTPB)based fuel are adopted as propellants.The diaphragm configuration settled in the aft mixing chamber includes four circular-holes with a uniform circumferential distribution.For both motors with and without the diaphragm,three-dimensional numerical simulations with gaseous combustions considered are carried out to study the flow field characteristics and motor performances.The comparison results show that the diaphragm can improve the mixing of the oxidizer and fuel.It has evident effect on increasing the motor efficiencies.Two firing experiments are conducted with full scale motors to investigate the effects of the diaphragm.The diaphragm used in the test is composed of a central steel framework and a closed thermal insulation layer.With the diaphragm employed,the combustion efficiency increases from 93.9%to 97.34%and the specific impulse efficiency increases from 80.77%to 87.28%,which verifies the positive effect of the diaphragm.Both numerical and experimental studies indicate that the scheme of the aft mixing chamber diaphragm proposed in the paper can improve the efficiencies of the hybrid rocket motor obviously. | TIAN Hui LI XinTian YU NanJia CAI GuoBiao | 2013 | Science China(Technological Sciences)2013，56，11： | 9 |
| 9 | Early Eocene Radiolarian Fauna from the Sangdanlin, Southern Tibet: Constraints on the Timing of Initial India-Asia Collision显示文摘This is a new report on the early Eocene radiolarian fauna from the Sangdanlin section in the Gyirong region, along the southern margin of the Yarlung Zangbo Suture Zone. The Sangdanlin section measured in this study is divided into three lithostratigraphic units from bottom to top: the Zongzhuo, Sangdanlin, and Zheya formations. Abundant radiolarian fossils were obtained from the Sangdanlin section and 54 species of 30 genera were identified and assigned as follows: Cryptamphorella conara-C. macropora the late Cretaceous Zone and Amphisphaera coronate, Buryella tetradica-Bekoma campechensis, and B.bidartensis-B. divaricata the Paleocene-early Eocene Interval Zones. The Paleocene–early Eocene radiolarian zones are comparable to the radiolarian zones RP4-RP8 in New Zealand. Based on the data of radiolaria and lithofacies, it is suggested that the Zongzhuo Formation should be deposited along the base of the north-facing, continental slope of the Greater Indian continental margin, and the Sangdanlin Formation should be a deep marine, sedimentary sequence located in a foreland basin. The early Eocene radiolarian fauna in the Sangdanlin Formation constrains the initial age of the India-Asia collision to no later than 53.6 Ma. | WANG Tianyang LI Guobiao LI Xinfa NIU Xiaolu | 2017 | Acta Geologica Sinica(English Edition)2017，91，6： | 9 |
| 10 | Design and optimization of variable thrust hybrid rocket motors for sounding rockets显示文摘Besides safety and low-cost,the start/shutdown/restarting and throttling ability are the other two significant advantages of hy-brid rocket motors(HRMs) compared with liquid and solid ones.In this study,a two-stage variable thrust and non-toxic 98%HP/HTPB hybrid rocket motor(VTHRM) is designed and applied in a sounding rocket,and the design parameters of the motor are analyzed and optimized.A computational program is developed to design the motor system structure,to predict the interior ballistics and the ballistic trajectory.A star grain and a wheel grain are compared.The design of experiment(DOE),variance analysis and the main effect analysis are employed to investigate the influence of the main design parameters on mo-tor performance.The multidiscipline feasible(MDF) approach is applied to establish the optimization procedure after analyz-ing the system design structure matrix.A modified differential evolution algorithm is employed to maximize the load mass.The results indicate that the wheel grain could obtain a larger load mass and a lower length to diameter ratio,and that throttling markedly meliorates the motor and rocket performance.The conclusions drawn from the analysis and optimization could pro-vide instructive guide and theoretical basis for engineering designs. | RAO DaLin CAI GuoBiao ZHU Hao TIAN Hui | 2012 | Science China(Technological Sciences)2012，55，1： | 9 |
| 11 | Design and integrated simulation of a pressurized feed system of the dual-thrust hybrid rocket motor显示文摘A new pressurized feed system of the dual-thrust hybrid rocket motor for flight is presented in this paper.The feed system supplies 90% hydrogen peroxide (90%H 2 O 2) with two different flows of 4.5 and 2 kg s 1.The oxidizer flow is changed through regulating the mass flow of the high-pressure gas and switching the performance modes of the unique oxidizer flow control valve simultaneously.The models of the gas storage container,pressure regulator valve,control orifice,propellant tank,oxidizer flow control valve and cavitating venturi are generated and used to compute the instantaneous pressure,temperature and mass flow rate.There is a good agreement between the simulated and experimental results.Parameter sensitivity analysis is also conducted.It is found that the throat diameter of the cavitating venturi in feed line 1 is the main factor affecting the mass flow in both boost and sustaining phase.Other parameters have limited effects on the mass flow rate and the transition time of the system. | LI JunHai YU NanJia ZENG Peng CAI GuoBiao | 2013 | Science China(Technological Sciences)2013，56，4： | 9 |
| 12 | Research on vacuum plume and its effects显示文摘In vacuum environment, the exhaust flow of attitude control thrusters would expand freely and produce the plume, which possibly causes undesirable contamination, aerodynamic force and heating effects to the spacecraft. Plume work station (PWS) is developed by Beihang University (BUAA) for numerically simulating the vacuum plume and its effects. An approach which combines the direct simulation Monte Carlo (DSMC) method and difference solution of Navier-Stokes (N-S) equations is applied. The internal flows in nozzles are simulated by solving the NS equations. The flow parameters at nozzle exit are used as the inlet boundary condition for the DSMC calculation. Experimental studies are carried out in a supersonic low density wind tunnel which could simulate the 60-80 km altitude environment to investigate the plume and its effects. To demonstrate the capability of PWS, numerical simulations are performed for the vacuum plume of several typical attitude control thrusters. The research results are of great help for the engineering design. | He Bijiao Zhang Jianhua Cai Guobiao | 2013 | Chinese Journal of Aeronautics2013，26，1： | 6 |
| 13 | Discovery of Radiolaria from the Zongzhuo Formation in Tianba,Kangmar,Tibet and its Age Implication显示文摘有一组使成杂色的海洋的存款,包括在 Tianba 的区域普遍的红床, Kangmar,南部的西藏,以前的工作它由石版印刷逻辑协会贡献了白垩纪 Zongzhuo 形成仅仅,但是与穷人一起石块证据。由于标明日期石块的年龄的缺席,红床年龄是阴暗的。丰富的白垩纪 radiolaria 在现在的学习从 Zongzhuo 形成被发现。尽管有重新使结晶的一些放散虫类的各类动物标本的差的一般保藏在屑的石英,从 radiolaria 的 46 个类的 58 种类,在 Kangmar 从燧石和 Zongzhuo 形成的 silicous 石灰石提取了,根据他们的形状和装饰被识别。基于 radiolaria,这个区域的 Zongzhuo 形成的年龄被叫作迟了白垩纪。从 Tianba 区域的 Zongzhuo 形成的新放散虫类的各类动物数据提供一个本地基础相关有 Tethyan Himalaya 的另外的区域的这些存款。 | LI Guobiao XIE Dan WAN Xiaoqiao HAN Hongdou CHEN Puli | 2009 | Acta Geologica Sinica(English Edition)2009，83，5： | 6 |
| 14 | Multi-disciplinary design optimization with fuzzy uncertainties and its application in hybrid rocket motor powered launch vehicle显示文摘In this paper,an Uncertainty-based Multi-disciplinary Design Optimization (UMDO)method combining with fuzzy theory and Multi-Discipline Feasible (MDF) method is developed for the conceptual design of a Hybrid Rocket Motor (HRM) powered Launch Vehicle (LV).In the method proposed,membership functions are used to represent the uncertain factors,the fuzzy statistical experiment is introduced to analyze the propagation of uncertainties,and means,standard deviations and credibility measures are used to delineate uncertain responses.A geometric programming problem is solved to verify the feasibility of the Fuzzy-based Multi-Discipline Feasible(F-MDF) method.A multi-disciplinary analysis of a three-stage HRM powered LV involving the disciplines of propulsion,structure,aerodynamics and trajectory is implemented,and the mathematical models corresponding to the F-MDF method and the MDF method are established.A two-phase optimization method is proposed for multi-disciplinary design optimization of the LV,including the orbital capacity optimization phase based on the Ziolkowski formula,and the scheme trajectory verification phase based on the 3-degree-of-freedom point trajectory simulation.The correlation coefficients and the quadratic Response Surface Method (RSM) based on Latin Hypercube Sampling (LHS) are adopted for sensitive analysis of uncertain factors,and the Multi-Island Genetic Algorithm (MIGA) is adopted as the optimization algorithm.The results show that the F-MDF method is applicable in LV conceptual design,and the design with the F-MDF method is more reliable and robust than that with the MDF method. | Pengcheng WANG Hui TIAN Hao ZHU Guobiao CAI | 2020 | Chinese Journal of Aeronautics2020，33，5： | 6 |
| 15 | Late Cretaceous Foraminiferal Faunas from the Saiqu“mélange”in Southern Tibet显示文摘As one of the mélanges in the southern side of the Yarlung-Zangbo suture zone,the Saiqu mélange in southern Tibet is important for understanding the evolution of the Neo-Tethys ocean.The age of the Saiqu mélange,however,has been debated due to the lack of reliable fossil evidence in matrix strata.Based on lithological similarities with platform strata in southern Tibet and limited fossils from exotic blocks,previous studies variously ascribed the Saiqu mélange to be Triassic in general,Late Triassic,or Late Cretaceous.Here we reported planktonic foraminiferal faunas from the matrix strata of the Saiqu mélange.The new fossils yield a Late Cretaceous age,which is so far the best age constraint for the mélange.Regional stratigraphic correlation indicates that the Cretaceous Oceanic Red Beds (CORBs)in Saiqu may be time equivalent to the CORBs of the Zongzhuo Formation in neighboring regions.Thus the Saiqu mélange should be correlated to the Upper Cretaceous Zongzhuo Formation rather than the Triassic Xiukang Group,as previously suggested. | LI Guobiao WAN Xiaoqiao JIANG Ganqing HU Xiumian GOUDEMAND Nicolas HAN Hongdou CHEN Xi | 2007 | Acta Geologica Sinica(English Edition)2007，81，6： | 5 |
| 16 | Inversion of particle size distribution from light-scattering data using a modified regularization algorithm显示文摘A modified regularization algorithm with a more proper operator was proposed for the inversion of particle size distribution(PSD) from light-scattering data in a laser particle sizer based on the Mie scattering principle.The Generalized Cross-Validation(GCV) method and the L-curve method were used for determining the regularization parameter.The Successive Over-Relaxation(SOR) iterative method was used to increase the exactness and stability of the converged result.The simulated results based on the modified algorithm are in a good agreement with the experimental data measured for nine standard particulate samples,their mixtures as well as three natural particulate materials with irregular shapes,indicating that this modified regularization method is not only feasible but also effective for the simulation of PSD from corresponding light-scattering data. | Yanmin Wang Guobiao Liang Zhidong Pan | 2010 | Particuology2010，8，4： | 5 |
| 17 | Analysis of precipitation in a Cu-Cr-Zr alloy显示文摘Precipites in Cu-0.42%Cr-0.21%Zr alloy were analyzed by using scanning electron microscope(SEM),energy dispersive X-ray spectroscopy(EDXS)and transmission electron microscope(TEM).After the solid solution was performed at 980oC for 2 h,water-quenched and aged at 450oC for 20 h,the precipite had a bimodal distribution of precipitate size.The coarse precipitates are pure Cr and Cu5Zr,the dispersed fine precipitate is CrCu2(Zr,Mg)and pure Cr ranging from 1 to 50 nm.The coarse phases formed during solidification and were left undissolved during solid solution.The fine precipitates are the hardening precipitates that form due to decomposition of the supersaturated solid solution during aging. | Zhao Mei Lin Guobiao wang Zidong Zhang Maokui | 2008 | China Foundry2008，5，4： | 5 |
| 18 | Uncertainty analysis and probabilistic design optimization of hybrid rocket motors for manned lunar landing显示文摘To obtain a conceptual design for a hybrid rocket motor(HRM)to be used as the Ascent Propulsion System in the Apollo lunar module,the deterministic design optimization(DDO)method is applied to the HRM design.Based on the results of an uncertainty analysis of HRMs,an uncertainty-based design optimization(UDO)method is also adopted to improve the design reliability.The HRM design process,which is a multidisciplinary system,is analyzed,and a mathematical model for the system design is established to compute the motor performance from the input parameters,including the input variables and model parameters.The input parameter uncertainties are quantified,and a sensitivity analysis of the model parameter uncertainties is conducted to identify the most important model parameter uncertainties for HRMs.The DDO and probabilistic UDO methods are applied to conceptual designs for an HRM to be used as a substitute for the liquid rocket motor(LRM)of the Ascent Propulsion System.The conceptual design results show that HRMs have several advantages as an alternative to the LRM of the Ascent Propulsion System,including nontoxic propellant combination,small motor volume,and comparable functions,such as restarting and throating.Comparisons of the DDO and UDO results indicate that the UDO method achieves more robust and reliable optimal designs than the DDO method.The probabilistic UDO method can be used to develop better conceptual designs for HRMs. | ZHU Hao TIAN Hui CAI GuoBiao BAO WeiMin | 2015 | Science China(Technological Sciences)2015，58，7： | 4 |
| 19 | Design of double-layer anti-sputtering targets for plume effects experimental system显示文摘在一个真空房间使用的一个电的推进器的劈啪作响背的效果在推进器,真空房间和试验性的设备上有不利效果。一个劈啪作响反的目标(著名计算机生产厂商) 能由减少劈啪作响背的免职效果扩大真空房间的操作生活。在国际设备使用的真空房间成功地合并了著名计算机生产厂商。改进著名计算机生产厂商表演,一个双层结构著名计算机生产厂商基于羽毛效果,试验性的系统(足) 被设计。结构 AST 主要结束当第二等的结束作为一个快门被设计解决象服务生活,劈啪作响的材料的背流动率,经济和系统安全那样的因素时,作为一座公寓被设计。验证双层著名计算机生产厂商的效果, AST 有或没有的劈啪作响的效果第二等结束被一个 DSMC 照片算法评估。另外,赤裸的房间的试验性的确认和目标被执行。结果显示第二等的结束石墨表能减少背流动收益约 50% 。双层著名计算机生产厂商的设计能为一个劈啪作响反的目标的设计作为一本参考书被介绍。 | SHANG ShengFei CAI GuoBiao ZHU DingQiang HE BiJiao | 2016 | Science China(Technological Sciences)2016，59，8： | 4 |
| 20 | Theoretical development for DSMC local time stepping technique显示文摘The direct simulation Monte Carlo(DSMC) method is the most mature and wildly used approach for nonequilibrium gas flow simulation.The phenomenological nature of this method brings flexibility to the computation algorithms.In this study,the theoretical foundations to decouple the molecular motion and collision within a time step are discussed in detail,which can be treated as criterions for the DSMC algorithms.Based on the theoretical developments,an improved local time stepping scheme is proposed,which specifies the movement time attribute and the collision time attribute for each representative particle.A free flow about a sphere body is considered as an example,which is compared with the calculations using the published local time stepping technique.The results show that the improved local time scheme is valid and is promising in realizing flow structures with strong variations. | CAI GuoBiao SU Wei HOU FengLong | 2012 | Science China(Technological Sciences)2012，55，10： | 4 |
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