|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Lessons from Rotor 37显示文摘NASA rotor 37 was used as a ’blind’ test case for turbomachinery CFD by the Turbimachinery Com-mittee of the IGTI. The rotor is a transonic compressor with a tip speed of 454 m/s (15OO ft/s) anda relatively high pressure ratio of 2.1. It was tested in isolation with a circumferentially uniform inletflow so that the flow through it should be steady apart from any effects of passage to passage geometry variation and mechanical vibration. As such it represents the simplest possible type of test forthree-dimensional turbomachinery flow solvers. However, the rotor still presents a real challenge to3D viscous flow solvers because the shock wave-boundary layer interaction is strong and the effects ofviscosity are dominant in determining the flow deviation and hence the pressure ratio. Eleven ’blind’solutions were submitted and in addition a ’non-blind’ solution was used to prepare for the exercise-This paper reviews the fiow in the test case and the comparisons of the CFD solutions with the testdata. Lessons for both the Flow Physics in transonic has and for the application of CFD to suchmachines are pointed out. | J.D. Denton(Whittle Laboratory Cambridge University Engineering Dept., Cambridge, England) | 1997 | Journal of Thermal Science1997，6，1： | 29 |
| 2 | AerMet100——极好综合性能的超高强度钢显示文摘介绍了综合性能优良并有广泛应用前景的新型超高强度钢Aer-Met100.与其它超高强度钢相比,它具有更突出的综合性能:高强度、高硬度、高断裂韧性和延展性。 | Wan Xiaoru (Beijing University of Aeronautics and Astronautics,Dept. of Materials Science Engineering) | 1996 | 北京航空航天大学学报1996，22，6： | 27 |
| 3 | DEVELOPMENT OF POLYMER MINERAL COMPOSITE AND ITS DAMPING PROPERTY显示文摘The principle of production of polymer mineral composite was analyzed. Property parameters and the procedure for producing PMC components were also given. Damping property and principle of vibration absorption of polymer mineral composite were also investigated. Reduced experiment was conducted for two jigs which are similar in structure only different in material that one made of PMC the other made of casting iron to test their dynamic characteristic. | J.Sun 1) ,J.F.Li 2) ,B.J.Lu 1) ,J.F.Zhong 3) and X.P. Huang 1) 1) Dept. of Agri. Eng., Laiyang Agriculture College, Laiyang 265200,China 2) Dep. of Mech. Eng., Shandong University of Technology, Jinan 250061,China 3) Agruculture S | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，5： | 23 |
| 4 | A Study on Solid/Melt Interfaces and the Formation of<100> Texture in Solidified FCC Metals显示文摘The (100) texture of solidified fcc metals, caused by the preferential (100) dendrite growth, could be closeIy related to solid/melt interfaces which behave differently along different crystallographic orientation. The stability and roughness of {111} and {100} solid/melt interfaces of fcc metals were investigated using a modified Temkin multi-layer model. It is demonstrated that {100}crystal/melt interface is more unstable and rougher than {111} interface. The effect of the stability of crystal/melt interface on the (100) texture formation in solidified fcc metals has been analysed and discussed. | D.Y.Li(Dept. of Mater. Sci & Eng., The Pennsylvania State University, University Park, PA 16802, USA )B.Debray and J.A.Szpunar(Dept. of Metall. Eng., McGill University, 3450 Uuiversity Street, Molitreal, PQ, Canada H3A 2A7) | 1997 | Journal of Materials Science & Technology1997，13，6： | 20 |
| 5 | GENERALIZED NEKRASOV MATRICES AND APPLICATIONS显示文摘In this paper,the concpet of generalized Nekrasov matrices in introduced,some prop-erties of these matrices are discussed,obtained equivalent representation of generalized diagonally dominant matrices. | Mingxian Pang Zhuxiang Li (Dept. of Math, of Normal college, Beihua University, Ji Lin 132013, China) | 2003 | Journal of Computational Mathematics2003，21，2： | 19 |
| 6 | WATER POLLUTION IN THE RIVER MOUTHS AROUND BOHAI BAY显示文摘Twelve water samples were collected and analyzed. The samples were taken from the river mouths around Bohai Bay including the Jiyun, New Yongding, Haihe, Dagu, Duliujian, Qingjinghuang, Qikou, Dakou, and Yellow Rivers, and tested for concentrations of heavy metals, arsenic, total nitrogen (TN) and total phosphorus (TP). The results show that the river mouths are polluted and the water quality exceeds Class V of the Environmental Quality Standard for Surface Water (EQSSW). The main pollutants are Hg, nitrogen (N) and phosphorus (P). The concentrations of the other pollutants are within Class Ⅱ of the Standard. The Hg content in the Haihe River mouth is now 10 times higher than it was 20 years ago, indicating that the accelerating water pollution has reached an alarming level. The high concentrations of N and P cause eutrophication of the waters.Analysis indicates that the terrestrial pollutants and nutrients are the main cause of frequently occurring red tides in the Bohai Sea. | Cheng LIU, Zhao-Yin WANG and Yun HE Dr., Asso. Prof., International Research and Training Center on Erosion and Sedimentation, Beijing 100044.China,Prof.. Dept. of Hydraulic Engineering, Tsinghua University & International Research and Training Center onErosion and Sedimentation, Beijing, 100084, China.China Institute of Water Resources and Hydropower Research. Beijing 100084, China, | 2003 | International Journal of Sediment Research2003，18，4： | 18 |
| 7 | MICROSTRUCTURE AND MECHANICAL PROPERTIES OF SiC_W/BAS (BaAl_2Si _2O_8) GLASS-CERAMIC COMPOSITE显示文摘BAS (BaAl 2Si 2O 8) glass ceramic was prepared by a sol gel process and the SiC W/BAS composites were fabricated by hot pressing. The transformation from hexacelsian to celsian, the microstructure and mechanical properties of the composites was investigated. The results show that the transformation promoted by adding celsian seeds is retarded in the composite by the presence of SiC whisker. SiC whisker has a good effect of improving the mechanical properties of BAS glass ceramic matrix. The toughening mechanisms are crack deflection and whisker fracture. The strengthening mechanism is loading transition. The amorphous phase at SiC W/BAS matrix interface damages the fracture toughness and high temperature strength of the composites. | J.M.Yang,J.C.Lei,J.P.Li and P.Cheng Dept. Mater.Sci.and Eng. Xi’an Institute of Technology, Xi’an 710032,China | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，5： | 14 |
| 8 | Lattice-Valued Proposition Logic(Ⅱ)显示文摘Lattice-ValuedPropositionLogic(Ⅱ)QinKeyun;XuYang(Dept.ofAppl.Mathematics,SouthwestJiaotongUniversity)Chengdu610031,ChinaLatti... | Qin Keyun Xu Yang( Dept. of Appl. Mathematics, Southwest Jiaotong University)Chengdu 610031,China | 1994 | Journal of Modern Transportation1994，11，1： | 13 |
| 9 | A New Modified GM (1,1) Model: Grey Optimization Model显示文摘Based on the optimization method, a new modified GM (1,1) model is presented, which is characterized by more accuracy prediction for the grey modeling. | Xiao Xinping College of Scienced, Wuhan University of Technologyl 430063, P R. China Deng Julong Dept. of Control, Huazhong University of Science and Technology, Wuhan 430074,P. R. China | 2001 | Journal of Systems Engineering and Electronics2001，12，2： | 12 |
| 10 | STABILITY OF BIDIRECTIONAL ASSOCIATIVE MEMORY NEURAL NETWORKS WITH DELAYS显示文摘In this paper the globally asymptotic stability of more general two-layer nonlinear feedback associative memory neural networks with time delays is examined. The sufficient conditions of existence, uniqueness and globally asymptotic stability of the equilibrum position are given. Finally, two interesting examples to illustrate the theory are given. | Liao Xiaoxin(Dept. of Auto. Control. Huazhong Univ. of Science & Technology, Wuhan 430074)Liao Yang(Dept. of Computer Science, Nanjing University, Nanjing 210093)Liao Yu (Wuhan Soundy Science & Commerce Company, Wuhan 430070) | 1998 | Journal of Electronics(China)1998，15，4： | 11 |
| 11 | New adaptive quasi-sliding mode control for nonlinear discrete-time systems显示文摘A new adaptive quasi-sliding mode control algorithm is developed for a class of nonlinear discrete-time systems, which is especially useful for nonlinear systems with vaguely known dynamics. This design is model-free, and is based directly on pseudo-partial-derivatives derived on-line from the input and output information of the system using an improved recursive projection type of identification algorithm. The theoretical analysis and simulation results show that the adaptive quasi-sliding mode control system is stable and convergent. | Wang Weihong1,2 & Hou Zhongsheng3 1. School of Tra?c and Transportation, Beijing Jiaotong Univ., Beijing 100044, P. R. China 2. Dept. of Automation, Taiyuan Univ. of Science & Technology, Taiyuan 030024, P. R. China 3. Advanced Control Systems Lab, School of Electronics and Information Engineering, Beijing Jiaotong Univ., Beijing 100044, P. R. China | 2008 | Journal of Systems Engineering and Electronics2008，19，1： | 11 |
| 12 | Sedimentary cycles of trace elements in Salawusu River Valley since 150 ka BP显示文摘The paper makes some analyses on 11 trace elements in the Milanggouwan stratigraphical section in the Salawusu River valley, which is regarded as a prototype geology-palaeoclimate record since 150 ka BP. The results show that the content and variation of trace elements has experienced remarkably regular changes in the pace with coarse and fine sedimentary cycles of palaeo-aeolian sands to its overlying fluvio-lacustrine facies or/and palaeosols. The trace elements with chemical properties of relatively active (V, Sr, Cu, Ni, As) and relatively stable (P, Pb, Rb, Mn, Nb, Zr) are a manifestation of the corresponding 27 changeable cycles between peak and valley values, appearing a multi-fluctuational process line of relative gathering and migration since then. The low numerical value distribution of these two types of trace elements in the aeolian sand facies represents erosion and accumulation under wind force during the cold-dry climate. Whereas their enrichments in both fluvio-lacustrine facies and palaeosols are related to the valley抯 special low-lying physiognomic position between the Ordos Plateau and the Loess Plateau under the warm and humid climate conditions. The above relatively migrated and gathered change of the trace elements is the result of 27 climatic cycles of cold-dry and warm-humid, which is probably caused by repeated alternations of winter monsoon and summer monsoon in the Mu Us Sandy Land influenced by the climate vicissitudes in northern hemisphere during glacial and interglacial periods since 150 ka BP. | YAO Chun-xia1,2, LI Bao-sheng1,2, JIN He-ling3, David Dian Zhang4, YAN Man-cun5, ZHU Yi-zhi2, LI Hou-xin1, ZHANG Yu-hong1, Luo Kai-li1 (1. Dept. of Geography, South China Normal University, Guangzhou 510631, China 2. State Key Laboratory of Loess | 2002 | Journal of Geographical Sciences2002，12，1： | 10 |
| 13 | Estimation of net primary productivity in China using remote sensing data显示文摘It is significant to estimate terrestrial net primary productivity (NPP) accurately not only for global change research, but also for natural resources management to achieve sustainable development. Remote sensing data can describe spatial distribution of plant resources better. So, in this paper an NPP model based on remote sensing data and climate data is developed. And 1km resolution AVHRR NDVI data are used to estimate the spatial distribution and seasonal change of NPP in China. The results show that NPP estimated using remote sensing data are more close to truth. Total annual NPP in China is 2.645109 tC. The spatial distribution of NPP in China is mainly affected by precipitation and has the trend of decreasing from southeast to northwest. | SUN Rui, ZHU Qi-jiang (Dept. of Resources and Environment Sciences, Beijing Normal University, Beijing 100875, China) | 2001 | Journal of Geographical Sciences2001，11，1： | 10 |
| 14 | The corridor effect of metropolitan spatialextension and optimization of landscape structure—the case of Beijing显示文摘Because of the existence of gradient field of the urban center and the corridor effect. underthe drive of going merely after economic benefit, the city intrinsically has the trend of massive growth, and this will seriously destroy the urban reasonable landscape structure and the ecological equilibrium.By applying the theory of corridor effect. this paper studies the interactive process between artificialcorridors and natural corridors. At the same time, by studying the Beijing’s spatial extension pattern in central urban area during different periods. this paper analyses the corridors extension volume.extension velocity and variant tendency of urban landscape on & directions. Moreover. this paperbrings forward the idea of incorporating the systen of natural corridors into the Beijing’smetropolitan planning, namely to form a star-shaped scattering-group pattern in which artificialcorridors and natural corridors are alternately distributed in order to effectively prevent built-up areafrom massive growth . | ZONG Yue-guang, TANG Yan-bing, CHEN Hong-chun, GUO Rui-hua(Dept. of Resources & Environment, Beijing Normal University, Beijing 100875, China) | 1999 | Journal of Geographical Sciences1999，9，4： | 10 |
| 15 | A MATHEMATICAL MODEL FOR RESERVOIR SEDIMENTATION AND FLUVIAL PROCESSES显示文摘This paper consists of two parts: mechanism of non-equilibrium transport of non-uniform sediment and its application in the mathematical model. Based on a statistic approach of sediment transport proposed by the authors, a 1 - D equation of non-e- quilibrium transport for various size group of sediment particles is developed. Then equations to predict change of sediment concentration and the corresponding changes in size distribution of suspended load and bed material are also derived. The conception that changes in size distribution are interrelated to sediment-carrying capacity is expounded. These results reveal the essence of sediment transport of non-uniform sediment particles. In the second part a mathematical model incorporating the mentioned equations to compute deposition and scouring in reservoirs as well as the fluvial processes of river channels has been developed. Verification of the model agrees well with field data. | Han Qiwei and He Mingmin (Senior Research Engineers, Dept. of Sedimentation Eng. Inst. of Water Conservancy and Hydroelectric Power Research.) (The English text is abridged, altered and edited by Ding Lianzhen) | 1990 | International Journal of Sediment Research1990，5，2： | 10 |
| 16 | SOME DIAGNOSTICS IN NONLINEAR REPRODUCTIVE DISPERSION MODELS显示文摘This article discusses the problem of the detection of influential cases in nonlinear reproductive dispersion models (NRDM). A diagnostic based on case\|deletion approach in estimating equations is proposed. The relationships between the generalized leverage defined by Wei et al. in 1998, statistical curvature, and the local influence of the response vector perturbations are investigated in NRDM. Two numerical examples are given to illustrate the results. | Tang Niansheng 1,2 \ Wei Bocheng 1\ Wang Xueren 21 Dept. ofAppl.Math., SoutheastUniv.,Nanjing 210096.2 Adult Education College,Yunnan Univ.,Kunm ing 650091. | 2000 | Applied Mathematics(A Journal of Chinese Universities)2000，15，1： | 9 |
| 17 | Alkaloids from Isatis indigotica显示文摘Isaindigotone 1 and 3-(2’-hydroxyphenyl)-4(3H)-quinazolinone 2 were isolated from the roots of Isatis indigotica. Compound 1 was elucidated as a new alkaloid.Compound 2 was discovered for the first time from a natural | Ke Min DENG Xiao Yun WU Gen Jin YANG and Guo Wei QIN (Shanghai Institute of Materia Medica, Chinese Academy of Sciences. Shanghai 200031) (School of Pharmacy, Second Military Medical University, Shanghai 200433) ( Visiting scholar from Dept. of Chemistr | 1997 | Chinese Chemical Letters1997，8，3： | 9 |
| 18 | Static Theory for Planar Ferromagnets and Antiferromagnets | Feng Bo HANG Fang Hua LIN Courant Institute, 251 Mercer Street. New York. NY 10012, USA Dept. of Math, Princeton University, Fine Hall. Washington Road, Princeton, NJ 08544 USA. | 2001 | Acta Mathematica Sinica,English Series2001，17，4： | 8 |
| 19 | EXPERIMENTAL STUDY ON INCIPIENT MOTION OF SEDIMENT PARTICLES ON GENERALIZED SLOPING FLUVIAL BEDS显示文摘This paper presents an experimental investigation on incipient motion of non-cohesive uniform sediment under a steady-uniform stream flow on generalized sloping fluvial beds (combined lateral and stream-wise slope). The characteristic parameters affecting the incipient motion of sediment particles, identified based on the physical reasoning and dimensional analysis, are the threshold shear stress ratio (ratio of threshold shear stress for sloping bed to that for horizontal bed), lateral slope, stream-wise slope and angle of repose of sediment particles. Experiments were carried out in two ducts (closed-conduit flow) having section of semicircular invert with three types of sediments. In an open channel flow (laboratory flume study), the uniform flow is a difficult, if not impossible, proposition for a steeply sloping channel and is impossible to obtain in an adversely sloping channel. To avoid this problem, the tests were conducted with a closed-conduit flow. Equation of critical bed shear stress for the initial movement of sediment particles on generalized sloping beds was obtained using the experimental data. | Subhasish DEY Asst. Prof., Dept. of Civil Engrg., Indian Inst. of Tech., Kharagpur 721302, West Bengal, India. Fax: +91 3222 82254 | 2001 | International Journal of Sediment Research2001，16，3： | 8 |
| 20 | Pitting Corrosion Behaviour of Monel-400 Alloy in Chloride Solutions显示文摘Pitting corrosion behaviour of Monel-400 alloy in 3.5 wt pct NaCl sodium chloride solution has been investigated using the cyclic potentiodynamic anodic polarization technique. The effect of chloride ion concentration, pH values and difFerent temperatures on the pitting parameters were determined. The morphology of the pits produced after anodic polarization treatments was inspected by scanning electron microscope (SEM). The results indicated that, the increase in chloride ion concentration shifts Epit and Eprot of the alloy toward negative values and the pitting potential is much more dependent on pH value in the basic region. The breakdown of passivity with increasing temperature may be due to kinetic changes of passivating films and dissolution rate of the alloy in its passive | V.K.Gouda I.Z.Selim A.A.Khedr and A.M.Fathi(Physical Chemistry Dept., National Research Centre, Dokki, Cairo, Egypt) | 1999 | Journal of Materials Science & Technology1999，15，3： | 8 |
您所在的机构暂未开通此部分的功能，请联系管理员