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| 1 | 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 |
| 2 | 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 |
| 3 | Reliability-Based Design for Jacket Platform Under Extreme Loads显示文摘In this paper, reliability analysis for the offshore jacket platform with the interaction of structure- pile- soil under extreme environmental loads is carried out. The inherent uncertainties of the environmental load, foundation soil, platform itself, and calculating models are evaluated. The action of extreme loads on the offshore platform is modeled as a function of extreme wave height. The system capacity of the whole platform is determined by nonlinear pushover analysis, and the relevant probability property is obtained by the simulation method. The reliability model for the whole jacket platform is described as the relationship between the load and resistance based on the offshore design codes. The reliability of whole platform is calculated by the analytical method and the importance sampling method on the basis of a case study for a tripod jacket platform. | Jin Weiliang Associate Professor, Dr. -Eng., Zhejiang University, Hangzhou 310027 | 1996 | China Ocean Engineering1996，11，2： | 17 |
| 4 | 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 |
| 5 | 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 |
| 6 | COMPOSITE SOFT SWITCHING CONFIGURATION FOR INVERTERS USING BRIDGE LEG MODULES显示文摘The use of either lossless snubbers or resonant zero voltage switching (ZVS) and zero current switching (ZCS) techniques can increase efficiency and reduce electromagnetic inter ference (EMI) and noise of industrial power equipment at high switching frequencies. This paper presents an adaptive composite soft switching configuration which combines snubber functions and resonant ZCS circuits for switches in inverters using power bridge leg modules. Simulation and experimental results are included. | He Xiangning Yang Yuwen (Dept of Electrical Eng., Zhejiang University, Hangzhou 310027)Kuang Sheng(Department of Engineering, University of Cambridge, Cambridge, U.K.)Barry W. Williams Stephen J. Finney(Dept. of Computing & Electrical Eng., Heriot-Watt University, Edinburgh EH14 4AS, U.K.) | 2001 | Journal of Electronics(China)2001，18，1： | 7 |
| 7 | CROSS LAYER COORDINATED ENERGY SAVING STRATEGY IN MANET显示文摘Mobile Ad hoc NETwork (MANET) consists of a set of mobile hosts which can operate independently without infrastructure base stations. Energy saving is a critical issue for MANET since most mobile hosts will operate on battery powers. A cross layer coordinated framework for energy saving is proposed in this letter. On-demand power management, physical layer and medium access control layer dialogue based multi-packet reception, mobile agent based topology discovery and topology control based transmit power-aware and battery power-aware dynamic source routing are some of new ideas in this framework. | Xu Li Zheng Baoyu(Dept. of Info. Eng., Nanjing University of Post and Telecommunication, Nanjing 210003) (Dept. of Computer Science, Fujian Normal University, Fuzhou 350007) | 2003 | Journal of Electronics(China)2003，20，6： | 7 |
| 8 | A THIRD-ORDER BOUSSINESQ MODEL APPLIED TO NONLINEAR EVOLUTION OF SHALLOW-WATER WAVES显示文摘The conventional Boussinesq model is extended to the third order in dispersion and nonlinearity. The new equations are shown to possess better linear dispersion characteristics. For the evolution of periodic waves over a constant depth, the computed wave envelops are spatially aperiodic and skew. The model is then applied to the study of wave focusing by a topographical lens and the results are compared with Whalin′s (1971) experimental data as well as some previous results from the conventional Boussinesq model. Encouragingly, improved agreement with Whalin′s experimental data is found. [WT5”HZ] | Zhang Ying long CCM MINDEF, Department of Mech. and Prod. Eng., National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260 Zhu Song ping Department of Mathematics, the University of Wollongong, Wollongong, NSW 2522, Australia | 2000 | Journal of Hydrodynamics2000，12，2： | 7 |
| 9 | EXPERIMENTS AND SIMULATIONS OF A NEW DEVELOPED FORMING TECHNOLOGY-SHEAR-EXTRUSION PROCESS OF COMPONENTS WITH BRANCHES显示文摘Shear-extrusion process and its forming parumeters are proposed, whilst its laborsav- ing characteristic is utilized to forge large-size shutoff valve body on middle-due press. This new process is intended for the manufacture of large-size forged tubular components with branches on middle-due press. Experiments are carried out and processing parameters are obtained regarding the shear-extrusion process of a large-size shutoff valve body. Daformation and metal flow in the shear-extrusion process are inves- tigated. In orber to verify the laborsaving characteristic of this new process some contrastive experiments of extrusion force are performed between shear-extrusion and upsetting-extrusion for forming tubular components with branches. Based on rigid plastic FEM a plane-stain model is established to analyze shear-extrusion process of tubular components with branches. The analysis results by 2-dimensions PEM are comparatively quite well consistent with those of experiments. Both simulated and experimental results show that this new forming process is feasible for forging large-size tubular components with branches on middle-due press. | H.L. Yang, D.C. Kang, Z.L. Zhang, X.H. Piao and Z.D. Shi (National Die and Mold CAD Engineering Research Center, Shanghai Jiaotong University, Shanghai 200030, China) (School of Materials Sci. & Eng., Harbin Institute of Technology, Harbin 150001, China) | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，3： | 6 |
| 10 | MEASURING STRUCTURE COMPLEXITY OF UML CLASS DIAGRAMS显示文摘To provide system designer a valid measure to evaluate the structure complexityof class diagrams objectively, this letter first proposes a method to transform a class diagramsinto a weighted class dependence graph, then presents a structure complexity measure for classdiagrams based on entropy distance. | Zhou Yuming Xu Baowen (Dept. of Computer Science & Eng., Southeast Univ., Nanjing 210096) (State Key Laboratory of Software Engineering, Wuhan University, Wuhan 430072) (Jiangsu Key Lab. of Computer Info. Proc. Tech., Soochow Univ., Suzhou 215006) | 2003 | Journal of Electronics(China)2003，20，3： | 6 |
| 11 | Effects of Hydrogen on Behaviour of Low Cycle Fatigue of 2.25Cr-1Mo Steel显示文摘The effects of hydrogen atoms on behaviour of low cycle fatigue of 2.25Cr-1Mo steel have been investigated in present work. The results indicate that the cyclic softening rate and low cycle fatigue life are respectively increased and reduced remarkably by hydrogen atoms. In addition, hydrogen atoms make the original stress amplitude of low cycle fatigue increase, which is because of the drag effect of hydrogen atoms on the moving dislocations. Analyses using electron microscopy show that hydrogen atoms accelerate crack initiation of low cycle fatigue from inclusion and transfer the source of low cycle fatigue crack from the surface of specimen to the inclusion, which results in the marked decrease of low cycle fatigue life. The increase of cyclic softening rate for hydrogen charged specimen is due to hydrogen atoms accelerating the initiating and growing of microvoids from the secondary phase particles in the steel. The reducing of the drag effect of hydrogen atoms on moving dislocations is also helpful to the increase of the cyclic softening rate. | Guangwei HAN and Di FENG (Central Iron & Steel Research Institute, Beijing, 100081, China)(To whom correspondence should be addressed)Yujiu SONG(Dept. of Mater. Sci. & Eng., Xi’an Jiaotong University, Xi’an 710049, China) | 1995 | Journal of Materials Science & Technology1995，11，5： | 5 |
| 12 | APPROXIMATION ANALYSES FOR FUZZY VALUED FUNCTIONS IN L_1(μ)-NORM BY REGULAR FUZZY NEURAL NETWORKS显示文摘By defining fuzzy valued simple functions and giving L1(μ) approximations of fuzzy valued integrably bounded functions by such simple functions, the paper analyses by L1(μ)-norm the approximation capability of four-layer feedforward regular fuzzy neural networks to the fuzzy valued integrably bounded function F : Rn → FcO(R). That is, if the transfer functionσ: R→R is non-polynomial and integrable function on each finite interval, F may be innorm approximated by fuzzy valued functions defined as to anydegree of accuracy. Finally some real examples demonstrate the conclusions. | Liu Puyin (Dept. of System Eng. and Math., National Univ. of Defence Tech., Changsha 410073) | 2000 | Journal of Electronics(China)2000，17，2： | 4 |
| 13 | Behavior selection strategy for soccer robots显示文摘The soccer robot system and the effective multi agents cooperation strategy applied to the MASKARO team composed of a set of action controllers, a set of behavior module and a behavior selector are introduced. The action is the primitive low level component of the robot control system necessary to move the robots on the playground. Each action controller determines the linear and angular velocity commands of the robots corresponding to its own purpose. The behavior is the high level component of the robot control system composed of necessary action sequences. Each behavior module determines the desired action sequences and action commands corresponding to its own objective. The behavior selector considering the information that comes from the vision system selects the behavior of each robot every sampling time. Thus, the behavior of each robot is changed dynamically. The presented strategy is successfully applied to the MASKARO team and the team is ranked in the first place in the 2000 FIRA Korea Cup K League. | Dong M. Shin ( Dept. of Electrical Eng., Pohang University of Science and Technology, Nam Gu, Pohang, South Korea) | 2001 | Journal of Harbin Institute of Technology(New Series)2001，8，3： | 4 |
| 14 | A Physical Modeling Case Study on Sediment Disasters of Waterpower Stations in Mountain Rivers显示文摘A physical modeling case study on flood and sediment disaster of waterpower stations in mountain rivers was conducted.Field observations and laboratory experiments show that the reasons induced disasters of Boluo Waterpower Station are those main characteristics of mountain rivers in South-Western China.High speed flows with velocities between 10 to 20 m/s are provided with strong sediment canting capacity in flood season.Steep banks with thick loose surfaces are rich in sediment supply by landslides and... | LIU Xingnian CAO Shuyou HUANG Er (State Key Lab.of Hydraulics and Mountain River Eng.,Sichuan Univ.,Chengdu 610065,China) | 2005 | 四川大学学报(工程科学版)2005，37，S1： | 4 |
| 15 | Groupiness of Sea Waves and Their Characteristic Parameters显示文摘Three methods for studying wave groups and their main parameters for describing wave groupiness are reviewed in this paper. Then they are analyzed and compared combined with field data from both aspects of group height and group length. A method and two parameters that can describe wave groupiness are suggested. The groupiness parameters of sea waves at three field stations are given. The effects of groupiness on both distributions of the wave height and the phase of component waves are investigated. The effects of datum length on the calculated value of grouping parameters are also discussed. | Yu Yuxiu Gui Manhai Professor, Dept. of Civil Eng. Dalian University of Technology, Dalian 116024 Master, Dept. of Civil Eng. Dalian University of Technology, Dalian 116024 | 1996 | China Ocean Engineering1996，11，1： | 3 |
| 16 | Fabrication of Meander and Spiral Type Micro Inductors显示文摘TO obtain microstructure of magnetic devices, the thin film inductors were fabricated by the process such as thin film manufacturing, photolithography and wet etching. The frequency characteristics of these devices are measured at high frequency range. When the inductor sizes of the spiral and the meander type are same, the inductance and the quality factor of the spiral type inductor are larger than those of the meander type inductor, but the driving frequency of the spiral type inductor is lower than that of the meander typejinductor. | T.S. Yoont, W.S. Cio and C. O.Kim (Division of Material Eng., Chungnam Nail. Unly., Taejon 305-764, Korea) H. w. hag (Dept. of Electronic Communication, Juseong College, Chungbuk 363-794, Korea) Y.H.Kim (Dept. of Electrical Eng., Pukyong Nail. Unly., Pusan, 608-737, Korea) | 2000 | Journal of Materials Science & Technology2000，16，2： | 3 |
| 17 | Optical and Electrical Properties of Sensitized Polyaniline by Electrochemical Polymerization显示文摘To sensitize polyaniline with dyes by electrochemical polymerization, HClO 4 is employed as the dopant and oxidant, and the polyaniline with different sensitive properties is synthesized. The effect of sensitized emeraldine salt on the absorption spectrum is discussed in details. The maximum conductivity of sensitized films reaches 1.22 S/cm, and investigation on dye sensitizing of the polymer reveals that C.I. Direct Blue 71, C.I. Direct Blue 84, C.I. Direct Black 19 and CuPc-(COOH) 4 may enhance the photoconductivity of polyaniline greatly. | WANG Hui,ZHENG Jian-bang,FENG Wei,WU Hong-cai (School of Electr. & Inform. Eng., Xi’an Jiaotong University, Xi’an 710049,CHN) | 1999 | Semiconductor Photonics and Technology1999，5，3： | 3 |
| 18 | A NUMERICAL MODEL OF FAR-FIELD COD CONCENTRATION DISTRIBUTION FOR NATURAL RIVER显示文摘A far field numerical model is developed to simulate jet pollution into natural rivers. Its character is to compute the velocity and pollution concentration separately. The velocity is computed by SIMPLEC algorithm in boundary fitted coordinate systems. The pollution concentration distribution is computed by developed QUAL IIm and QAIIL 2D program. The present model was applied to the Xiantao section of the Hanjiang River a tributary of Yangtze River, and Xiangjiang River. The flow field and COD distribution are in good agreement with field data. | Hou Guo xiang, Li Qi, Shi Zhong kun, Chen Cai kan Faculty of Traffic Sci. & Eng., Huazhong University of Science and Technology, Wuhan 430074, P.R.China Ye Ming, Deng Lian mu Yangtze Water Resources Protection Institute, Wuhan 430051, P.R.China | 2000 | Journal of Hydrodynamics2000，12，1： | 3 |
| 19 | EFFECT OF COARSENING OF SURFACE BED MATERIAL ONNON-EQUILIBRIUM SEDIMENT TRANSPORT PROCESSDURING RIVER DEGRADATION显示文摘Previous investigations of non-equilibrium and equilibrium sediment transport are analyzed and a two dimensional (longitudinal profile) mathematical model of non-equilibrium sediment transport in river channels with non-uniform bed material is presented in this paper The concept of exchange rate of bed material is introduced, and a very short time step is used in the calculation. The distance for sediment recovering equilibrium for the non-uniform bed material is far longer than that for uniform bed material and the mechanism of the phenomenon is discussed. Because the size of bed material is coarsened, the scouring of sand is far less than that for the initial state and the distance of non-equilibrium sediment transport becomes much longer. A slower exchange rate of bed material then leads to a longer distance of non-equilibrium sediment transport. | LIU Jinmei WANG Guangqian WANG Shiqiang (1,2,3 Dept. of hydraulic Eng., Tsinghua University, Beijing 100084, China) | 1999 | International Journal of Sediment Research1999，14，2： | 3 |
| 20 | A SKELETONIZATION ALGORITHM BASED ON EUCLIDEAN DISTANCE MAPS AND MORPHOLOGICAL OPERATORS显示文摘In this letter a new skeletonization algorithm is proposed. It combines techniques of fast construction of Euclidean Distance Maps(EDMs), ridge extraction, Hit-or-Miss Transformation(HMT) of structuring elements and the set operators. It first produces the EDM image with no more than 4 passes through an image of any kinds, and then the ridge image is extracted by applying a turn-on scheme and performing a rain-fall elimination to accelerate the processing. The one-pixel wide skeleton is finally acquired by carrying out the HMTs of two structure elements and the SUBTRACT and OR operations. Experimental results obtained by practical applications are also presented. | Ma Lihong Yu Yinglin(Dept. of Electron. Eng. and Comm., South China Univ. of Tech. Guangzhou, 510641)Zhang Yu(Research Inst. of Computer Application, South China Univ. of Tech. Guangzhou, 510641) | 2001 | Journal of Electronics(China)2001，18，3： | 3 |
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