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| 1 | OXIDATION OF A TWO-PHASE Cu-75Cr ALLOY IN AIRAT 700-900℃显示文摘The cormsion in air of a two-phase Cu-75Cr alloy was studied at 700-900℃. Thealloy cormded nearly parabolically at 700-800℃, but at 900℃ its instantaneousparabolic mte constant decreased with time. The scales were complex and consistedof an outermost layer of copper oxide generally followed bg a layer of the double ox-ide Cu2 Cr2 O4 sometimes containing particles of unoxidized chromium surmunded bya chromia layer. An innermost layer of chromia was also observed in some cases.Finally metallic copper was al8o frequently mixed with chromia particles. No Cr de-pletion was observed in the alloy close to the inteffoce with the scale. In any case,this alloy was not able to form an exclusive continuous protective chromia layer. Thespecial cormsion behavior Of this alloy is typical of two-phase binary systems with alange solubility gaP in which the outwaof dthesion fiux of the most-reactive componentin the alloy is strongly reduced and may be inswncient to fOrm a protective externallayer of the cormsponding oxide. In paTticular, the presence of particles of Cr withina double oxide layer is very unusual and is allowed only for the kinetic reason. | F. Gesmundo Y Niu F. Vianiand D.L. Douglass(Universita di Genova, Fiera del Mare, Pad. D,16129 Genova, Italy)(State Key Lab. for Corrosion and Protection, Institute of Corrosion and Protection of Metals, theChinese Academy of Sciences, Shenyang 110015, Ch | 1997 | Acta Metallurgica Sinica(English Letters)1997，10，4： | 21 |
| 2 | 7~Be: A Geochemical Tracer for Seasonal Erosion of Surface Soil in Watershed of Lake Hongfeng, Guizhou, China显示文摘7Be penetrative depth in undisturbed surface soil is within 4mm.^7Be activity shows exponential decrease with soil depth,which is expressed as a diffusion process.7Be penetrative depth in undisturbed surface soil is apparently deeper in the fall (0.22-0.37g cm^-1) than in the spring (0.11-0.28g cm^-2) at the same site;Whereas,^7Be apparent activity at the top of surface soil is higher in the spring (0.3-2.2Bq g^-1)than in the fall (0.2-0.5Bqg^-1) at the same site,The 7Be inventory(189-544Bq m^-2)changes with both locations and seasons.Although the ^7Be flux to the earth's surface increases with amount of precipitation,its maximum inventory in the soil profiles decreases to 30%-40% after the rainy period.Calculated by the diffusion equation,the erosion and accumulation rates of soil particles are agreeable with the observation in situ,Which shows that the rates in fall are 1.5 times those in spring.The eroded soil particles almost all have been removed on the tablelands rathel than transported into the drainage system.This indicates that the soil erosion process in the karst region is only partial transportation within a short distance. | BAI ZHANGUO WAN GUOJIANG WANG CHANGSHENG WAN XI HUANGRONGGUI P.H. SANTSCHIZ and M. BASKARANZ(1￣State Key Lab. Of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences,Guiyang 550002 (China))(2￣Department Of Marine Scien | 1996 | Pedosphere1996，6，1： | 10 |
| 3 | REHEATING TEMPERATURE CONTRAST AND MICROSTRUCTURES OF 7075 Al ALLOY CAST BY LIQUIDUS SEMI-CONTINUOUS CASTING显示文摘In this study, reheating of liquidus semi-continuous east billets of 7075 Al alloy wascarried out in a resistance furnace, and the temperature contrast of the outer andthe center of the reheated billets was investigated, then the reheating microstructureswere investigated. Results show that: the difference of temperature between the outerand center is small and the difference of their microstructures are also small. Dur-ing reheating at 576° C the spheroidization of grains is significant after 5rain and norosettes are visible after 20min by optical microscopy. Similar observations were madeon materials reheated at 596° C, but the ripening process is faster. The grains growup to 30-60pm, fine enough for thixoforming. | J. Dong, G.M. Lu and J.Z. CuiThe Key Lab. of Electromagnetic Processing of Material, Ministry of Education, Northeastern University, Shenvane 110004, China | 2002 | Acta Metallurgica Sinica(English Letters)2002，15，6： | 9 |
| 4 | Calibration based universal JPEG steganalysis显示文摘For steganalysis of JPEG images,features derived in the embedding domain appear to achieve a prefer-able performance. However,with the existing JPEG steganography,the minor changes due to the hid-den secret data are not easy to be explored directly from the quantized block DCT (BDCT) coefficients in that the energy of the carrier image is much larger than that of the hidden signal. In this paper,we present an improved calibration-based universal JPEG steganalysis,where the microscopic and macro-scopic calibrations are combined to calibrate the local and global distribution of the quantized BDCT coefficients of the test image. All features in our method are generated from the difference signal be-tween the quantized BDCT coefficients of the test image and its corresponding microscopic calibrated image,or calculated as the difference between the signal extracted from test image and its correspond-ing macroscopic calibrated image. The extracted features will be more effective for our classification. Moreover,through using the Markov empirical transition matrices,both magnitude and sign dependen-cies along row scanning and column scanning patterns existed in intra-block and inter-block quantized BDCT coefficients are employed in our method. Experimental results demonstrate that our proposed scheme outperforms the best effective JPEG steganalyzers having been presented. | HUANG FangJun1,2 & HUANG JiWu1,2 1 School of Information Science and Technology,Sun Yat-Sen University,Guangzhou 510275,China 2 Guangdong Key Lab. of Information Security Technology,Sun Yat-Sen University,Guangzhou 510275,China | 2009 | Science in China(Series F)2009，52，2： | 8 |
| 5 | 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 |
| 6 | Study on Hydrothermal Stability and Catalytic Activity of Al-SBA-15 Mesoporous Materials Prepared by Impregnation Method显示文摘The mesoporous Al-SBA-15 zeolite was obtained via impregnation of pure silica-based SBA-15 zeolite with aluminum nitrate.The Al-SBA-15 sample was calcined in air at 800 ℃ for 6 h and hydrothermally treated at near 100 ℃ for 120 h,respectively,and then the thermal and hydrothermal stability of Al-SBA-15 sample was investigated by X-ray diffractometry (XRD),scanning electron microscopy (SEM),transmission electron microscopy (TEM) and nitrogen adsorption and desorption techniques.The Al-SBA-15 sample was also studied by 27 Al nuclear magnetic resonance (27 Al NMR) and ammonia temperature programmed desorption (NH 3-TPD) techniques.In addition,the catalytic activity of Al-SBA-15 zeolite was investigated by the Friedel-Crafts reactions of 2,4-di-tert-butylphenol with cinnamyl alcohol.The test results showed that the thermal and hydrothermal stability of Al-SBA-15 zeolite was better than that of SBA-15 zeo-lite.The Al-SBA-15 zeolite sample prepared by impregnation method exhibits more framework aluminum species and Al-O-Si units.Therefore,the number of the surface hydroxyl groups was reduced,resulting in the stabilization of framework structure ofAl-SBA-15 zeolite.The aluminum species can form weak and medium-strong acid sites with catalytic activity. | Fu Jiquan Li Meng (Center of Chemical Engineering,Beijing Key Lab.,Beijing Institute of Fashion Technology,Beijing 100029) | 2011 | China Petroleum Processing & Petrochemical Technology2011，13，3： | 6 |
| 7 | Conductive Mechanism of Organic Conductor显示文摘Organic conductor is a kind of organic compound which has special electronic and magnetic properties. The research of the organic compounds has received considerable attention because of their potential applications in many areas. The molecular conductive units are theoretically investigated as well as their energy gap and charge distribution. The relationship of conductivity and micro mechanism is discussed. | ZHOU Yu fang 1,2 , LIU Zhi 2 (1. Dept. of Phys., Shandong University, Jinan 250100, CHN 2. State Key Lab. of Cryst. Mater., Shandong University, Jiana 250100, CHN) | 2002 | Semiconductor Photonics and Technology2002，8，3： | 6 |
| 8 | EFFECT OF INTERPHASE LIFT FORCE ON THE FLUID FLOW IN AN AIR-STIRRED CYLINDRICAL VESSEL显示文摘In the present paper, based on the two-phase model (Eulerian model), the two dimensional fluid flow liz air-stirred water systems is simulated, and the effect of interphase lift force on the fluid flow is specially discussed. In the Eulerian two-phase model, gas and liquid phase are considered to be two different continuous fluids interacting with each other through the finite inter-phase areas. The exchange between the phases is represented by source terms in conversation equations. Turbulence is assumed to be a property of the liquid phase, k - ε model is used to describe the behavior of the liquid phase. The dispersion of phases due to turbulence is represented by introducing a diffusion term in mass consecrvation equation. The contribution of bubble movement to the turbulent energy and its dissipation rate is taken into accounted by adding extra volumetric source terms to the equations of turbulent enemy and its dissipation rate. The comparison between the mathematical simulation and experiment data indicates that the interphase lift force has a big effect on the flow behavior, and considering both drug force and lift force as interphase forces is important to accurately simulate the gas-water two-phase fluid flow in air-stirred systems. The interphase lift force makes bubbles move away from the centerline, the gas concentration is decreased near the centerline, and increased near the wall. The lift force is smaller than drug force at the same place, especially far away from the centerline. | L.F. Zhang K.K. Cai Y. Qu and Y.S. Shen Postdoctoral Fellow of Japan Science Promotion Society Taniguchi Lab., Department of Metallurgy, Graduate School of Engineering, Tohoku University, Sendai980-8579, Japan School of Metallurgy, University of Scien | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，4： | 6 |
| 9 | THE PLANNING AND MANAGEMENT INFORMATION SYSTEM FOR SMALL TOWN (TOWNMIS)——A CASE STUDY AT XIAOLAN TOWN, SOUTH CHINA显示文摘Now, GISs are popular at most major cities along the coast in China. The lack of available digital geographic data is a serious bottleneck problem. This article first analyses the development characteristics of urban planning and management information system in China, and proposes a method for establishing a planning and management information system for small town. By using GIS as core and integrating with microcomputer network, office automation (OA), computer aided design (CAD), and multimedia technology, a microcomputer information system (TownMIS) is implemented after 3 year design and development. It may be a first comprehensive system for the planning and management of small towns. Since the January of 1996, TownMIS has been actually used in Xiaolan Town, a coastal rich town in South China. This has provided perfect technical, managerial, operational and institutional references for resolving the contradiction of the fast growing installation of GIS sites and fewer actually running system. | Chen Shunqing State Key Lab. of Resources & Environment Information System Institute of Geography, CAS, Beijing 100101, P. R. ChinaHuang Ling Ge Wenlan Urban Planning Automation Center Guangzhou Urban Planning Bureau, Guangzhou 510030, P. R. China | 1997 | Journal of Geographical Sciences1997，7，1： | 5 |
| 10 | Extended UML with Role Modeling显示文摘UML is widely accepted and applied by the international software industry. UML is a powerful language for Object oriented modeling, designing, and implementing software systems, but its Use Case method for requirement analysis and modeling software patterns has some explicit drawbacks. For more complete UML, this paper proposes the Role Use Case modeling and its glyphs, and provides an instance of requirement analysis using Role Use Case method. Uses the Role Model to modeling software pattern at knowledge level. This paper also extends the UML Meta Model and accentuates “RM before UML’s class Modeling”. | He Ke\|qing 1, Jiang Hong 1, He Fei 2, Ying Shi 3 1 School of Computer Science,Wuhan University,Wuhan 430072,China 2.Japan Advanced Institute of Science and Technogy,923\|1292,Japan 3.Stae Key Lab. of Software Engineering, Wuhan University,Wuhan | 2001 | Wuhan University Journal of Natural Sciences2001，6，Z1： | 4 |
| 11 | A Single-phase Spindle Motor Design for DVD Application显示文摘A single phase brushless spindle motor with innovative design has been developed for application in a DVD drive. The methods used to reduce the cogging torque and to improve the dynamic performance of this new design motor are proposed in this paper. The single phase brushless spindle motor is usually applied for cooling fan, pump and blower before the performance is improved by the reengineering process. The stator configuration and the drive circuit have been remodeled in order to meet the requirements of the spindle motor used in the DVD applications. | D.R.Huang, T.F.Ying, L.T.Kuo, S.J.Wang, H.C.Huang and C. Y.Huang (Opto-Electronic & System Labs., ITRI, Chutung, Hsinchu, Taiwan-China) | 2000 | Journal of Materials Science & Technology2000，16，2： | 4 |
| 12 | Behaviours of REE and Other Trace Elements During Pedological Weathering-Evidence from Chemical Leaching of Loess and Palaeosol from the Luochuan Section in Central China显示文摘The chemical leaching method is used for a systematic analysis of distribution characteristics of acid-soluble and acid-insoluble REE and other trace elements from the Luochuan loess deposits. The study shows that the acid-insoluble phase in loess and palaeosol is a stable component of old aeolian dusts and is characteristic of the provenance; the acid-soluble phase is the unstable component in the weathering pedogenic process and reflects rock-forming features after accumulation of aeolian dusts. The acid-insoluble REE and acid-soluble Sr and Pb can be used as geochemical indicators respectively to trace the provenance characteristics and the weathering pedogenic process. | Chen Jun, Wan Hongtao, Department of Earth Sciences, Nanjing University, Nanjing, Jiangsuand Lu HuayuKey Lab. of Loess and Quaternary Geology, Chinese Academy of Sciences,Xi an, Shaanxi Liu Xinzhu | 1996 | Acta Geologica Sinica(English Edition)1996，70，3： | 4 |
| 13 | Thermal and Transmission Properties of UV Nonlinear Optical Material——ZnCd(SCN)_4 Crystal显示文摘Zinc cadmium thiocyanate(ZCTC), ZnCd(SCN) 4, has been discovered as a UV second order nonlinear optical coordination crystal. Its thermal and transmission properties are reported. The thermal decomposition is characterized by using the X ray powder diffraction (XRPD) and infrared (IR) spectroscopy at room temperature. The absorptions of intrinsic ions and ZCTC in a solution state are discussed as well as transmission properties of the ZCTC crystal. An effective method of reducing the surface reflection loss of ZCTC crystal is introduced. | NING H X, XU D, WANG X Q, CHENG X F, YANG Z H (Institute of Cryst. Mater. and State Key Lab. of Cryst. Mater., Shandong University, Jinan 250100, CHN) | 2002 | Semiconductor Photonics and Technology2002，8，1： | 4 |
| 14 | CALCULATION OF 3-D TRANSIENT TEMPERATURE FIELD DURING LASER TRANSFORMATION HARDENING PROCESS显示文摘A three-dimensional transient heat transfer model for laser transformation hardening process has been developed in this paper. The finite size of the laser treated sample, the surface heat loss of the sample, the latent heat of phase transformation and the temperature dependence of thermal properties of materials were considered. The heat source was considered as a moving Gaussian heat flux with a constant velocity. Three-dimension unequally spatial grid explicit finite difference equations, alternating direction implicit finite difference equations and implicit finite difference equations were deduced respectively. Three programs to calculate the temperature field were developed using Fortran language. The transient temperature fields of C22, 42CrMo, C60 steel samples during laser transformation hardening process were calculated using these programs, and the widths and depths of laser transformation hardening zones were also predicted. C22, 42CrMo, C60 steel samples were treated by CO2 laser,the widths and depths of laser transformation hardening zones of these samples were also measured experimentally. The calculated widths and depths of laser transformation hardening zones are in good agreement with the experimental results. | L. W Zhang, R.S. Wang, J. Th.M.De Hosson, Y.L. Xia and F. G. Wang 1) The State Key Lab. for Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian 116023, China 2) Department of Applied Physics, University of Gro | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，2： | 4 |
| 15 | NUMERICAL MODELLING OF THE WATER AIR TWO PHASE JET INTO A PLUNGE POOL显示文摘The areated jet into a plunge pool is simulated by using a mathematical model of water air two phase flow. The equation of air mass fraction is employed together with the equations of the algebraic stresses model (ASM) of water air mixture to give the distributions of the air concentration and other flow parameters. The computational air concentration distribution is in agreement with the experimental data. | Xu Wei lin, Wang Wei, Yang Yong quan, Chen Jian kang State Key Hydraulic Lab. of High Speed Flows, Sichuan University, Chengdu 610065, P.R.China (Received Sep. 23, 1997) | 1999 | Journal of Hydrodynamics1999，11，3： | 3 |
| 16 | A Wavelet-Based Fuzzy Neural Network for Interpolation of Fuzzy If-Then Rules显示文摘In this paper, a wavelet-based fuzzy neural network with its structure and a learningalgorithm is proposed and the simulation results are given to prove its feasibility. | Jiao Licheng Liu Fang Wang Ling & Zhang Yanning(State Key Lab. of RSP and Center for Neural Networks, Xidian University, Xi’an 710071, P. R. China) (This project was partly supported by the National Thud of Intercent. Expert and partly supported bythe | 1998 | Journal of Systems Engineering and Electronics1998，9，4： | 3 |
| 17 | Microstructure and Temperature Distribution in ZnAl_2O_4 Sintered Body by Pulse Electric Current显示文摘Microstructure of reaction sintering of ZnAl2O4 at 1500℃ by hot-pressing(HP) and pulse electric current was investigated. The results indicated that the existed cracks in sintered body were caused by structure mismatch. lt is the evidence that periodical temperature field existed during pulse electric current sintering of nonconductive materials.The distance between high temperature areas was related to die diameter. | Dongming ZHANG, Zhengyi FU and Jingkun GUOState Key Lab. of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China | 2003 | Journal of Materials Science & Technology2003，19，6： | 3 |
| 18 | Experimental investigation on active acoustic flutter control显示文摘Experimenial studies on active acoustic fiutter control are carried out successfully in wind-tunnel after the theoretical study The experdrients verify the theory presented in the reference[1] and give valuable experimeotal results which predict a prondsing future of applying new techology and new ideas to the area of vibration induced by flow. | YANG Jun(Institute of Acoustics, Academic Sinica Beijing 100080)(State Key Lab. of Modern Acoustics, Naniing Universitg Naning 210093)HAN Fei QIU Xiaojun and SHA Jiazheng(State Key Lab. of Modern Acoustics, Nanjing Universitg Naning 210093) | 1997 | Chinese Journal of Acoustics1997，16，1： | 3 |
| 19 | Surface Activities of Calix [4]resorcinarenes Bearing Four Hydrophobic Chains and Its Solubilization for Organic Compounds显示文摘Calix resorcinarenes bearing four hydrophobic side chains ( Ar-Rn, Ar-Ph, and Ar-N) orient stably on water oil interface and show high solubilization capacities for organic compounds, such as long chain alcohols, benzene, toluene and dyes. The capacities are high even near the cmc of polyalkylated calix resorcinarenes, but the solubilities of organic compounds(solubilizates) decrease with the increase of the size of the solubilizates. Ar-R 6, with a chain length of six carbons, is the most effective among Ar-R n , Ar-Ph, and Ar-N; 11 fold mol of hexanol is dissolved in 2×10 -3 mol/L Ar-R 6. Moreover, Ar-R n bearing four alkyl side chains solubilizes the chain alcohols of the same chain length mostly. The solubilization capacities are presumably brought by inclusion in a large cavity of the polyalkylated calix resorcinarenes and by an efficient orientation of the solubilizates. | LI Bo *1 , Yoshifumi KOIDE 1 and Kunio ESUMI 21. Toyota Central R & D Labs., Inc., 41 1, Yokomichi, Nagakute, Aichi 480 1192, Japan 2. Departemnt of Applied Chemistry and Institute of Colloid and Interface Science, Science University of Tokyo | 2002 | Chemical Research in Chinese Universities2002，18，2： | 3 |
| 20 | Preparation and Properties of Nano-TiO_2 Powders显示文摘This paper reports the preparation of nano-TiO2 (about 10 nm) powder by the method of precipitation. In detail, some breparation conditions were investigated in order to find out how to control the grain size and reduce the agglomeration of powders. Also, the reflex spectra of nano-scale powders with different grain size were studied. It tvas found that the wave length and width of reflex spectra are connected with the grain size of nano-TiO2 | Zhe SONG Qing LI and Lian GAO(State Key Lab. of High Performance Ceramics & Superfine Microstructure, Shanghai Institute of Ceramics,Chinese Acadmey of Sciences, Shanghai 200050, China) | 1997 | Journal of Materials Science & Technology1997，13，4： | 3 |
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