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Partial Melting Processes During Exhumation of Ultrahigh-Pressure Metamorphic Rocks in Dabieshan, china

Journal of Earth Science 1999年第3期18卷 194-199页

作者： Zhong Zengqiu Zhang Hongfei Suo Shutian You Zhendong(Faculty of Earth Sciences, china University of Geosciences, Wuhan 430074) Faculty of Earth Sciences China University of GeosciencesWuhan 430074

Study practice has proved that the ultrahigh pressure metamorphic rocks iu Dabieshan must have exPerienced botk the retrograde metumorphism and partial melting under decompression and amphibolite-facies conditions during their exhumation from mantel depth to lower-middle *** retrometamorphism and partial melting of the ultrahigh pressure rocks in association with thermal state changing in the middle-lower crust, under amphibolite-facies conditions, are important physical and chemical processes. It would result in a great detrease in the integrated yield strength, and the enhancement of the de formabilitY or the rocks, promoting the transition from contractional (collision) to extensional defoemational regime. The statement of tbe retrometamorphism and partial melting of the ultrahigh pressure rocks has proved the in-site model for the ultrahigh pressure rocks in Dabieshan. It not only clarifies the evolutiou from the UHP eclogite to the surrounding gneissic rock (so called UHP gueiss) and to the garnet-beariug roliated granites (non-UHP country rocks), but also provides scientific arguments for the establiskment of the dynamic model of the exhumation of UHP metamorphic rocks in Dabiesban. In general, Purely conductive heat transfer from the crust itself is probably insurficient to produce temperature conditions for partial melting, and additional heat sources must have been present during partial melting. We infer that the partial melting and extensional flow are probably driveu by delamination and magmatic underplating of thickeued lithospkeric mantle following the continental oblique collision.

关键词： ultrahigh-pressure metamorphic rocks partial melting Dabieshan

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Fuzzy controllers based on some fuzzy implication operators and their response functions

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Progress in Natural Science:Materials International 2004年第1期14卷 16-21页

作者： LI Hongxing 1*, YOU Fei 1 and PENG Jiayin 2(1. Department of Mathematics, Beijing Normal University, Beijing 100875, china 2. Department of Mathematics, Neijiang Teacher's College, Neijiang 641112, china) Beijing Normal Univ Dept Math Beijing 100875 Peoples R China

The fuzzy controllers constructed by 23 fuzzy implication operators based on CRI algorithm and their response functions are discussed. The conclusions show that the fuzzy controllers constructed by 9 fuzzy implication operators are universal approximators to continuous functions and can be used in practical fuzzy control systems. And these 9 fuzzy implication operators except for Einstein operator intersection are all the adjoint pairs of some fuzzy implication operators. Besides, there are 3 other fuzzy controllers formed by fuzzy implication operators being regarded approximately as fitted functions.

关键词： fuzzy implication operators CRI algorithm fuzzy controllers response functions universal approximators

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The Forecast and Regional Analysis of the Private Motor Vehicle Market in china

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Systems Science and Systems Engineering 1999年第4期9卷 120-130页

作者： FANG Bi\|qi,\ ZHOU Yong,\ SUN Liu\|quan Institute of Applied Mathematics, Academia Sinica,Beijing 100080, china

This paper investigates the private motor vehicle market in china, which has been developed since 1984. Combined forecasting for the number of motor vechicles owned by individuals is made from several least squares regression equations and a Logistic model. Regional analysis is made on the data of the thirty areas by hierarchical cluster, revealing various types of the development of the regional markets.

关键词： regression Logistic model combined forecasting cluster motor vehicle

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SEEPAGE ANALYSIS OF LANDFILL FOUNDATIONS IN SHANGHAI LAOGANG LANDFILL PHASE IV

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Journal of Hydrodynamics 2006年第5期18卷 613-619页

作者： ZHANG Qian-fei WANG Yan-ming XU Yong-fu School of Naval Architecture Ocean and Civil Engineering Shanghai Jiaotong University Shanghai 200030 China Shanghai Municipal Engineering Design Institute Shanghai 200092 China

A complex seepage flow field with unknown free surface was formed in the Shanghai Laogang Municipal Solid Waste （MSW） Landfill by the perimeter cut-off wall around the landfill site and the Prefabricated Vertical Drains （PVD） in the foundation of landfill. First, the equivalent vertical permeability was presented based on the drainage mechanism of PVD and the related calculation method was studied to macroscopically reflect the impact of PVD on the seepage flow status of the landfill foundation. With the influence of the cut-off wall and the PVD on the infiltration of groundwater, the total inflow was classified into two parts： the lateral inflow through the cut-off wall outside the landfill, and the upward infiltration through the PVD from the foundation of the landfill. Seepage analysis was conducted using the finite element method according to the actual scenario of Laogang Landfill, and the lateral infiltration and the upward infiltration were calculated, respectively. The results show that the total inflow into the landfill area was mostly supplied by the upward infiltration through the PVD and the perimeter cut-off wall was significantly effective to depressurize the seepage pressure and to reduce the flow rate.

关键词： Municipal Solid Waste (MSW) landfill foundations of landfill cut-off wall Prefabricated Vertical Drain (PVD) lateral infiltration upward infiltration finite element analysis

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Research and Development of Electronic and Optoelectronic Materials in china

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Journal of Semiconductors 2000年第11期21卷 1041-1049页

作者： WANG Zhan\|guo(Z.G.Wang (Laboratory of Semiconductor Materials Science, Institute of Semiconductors, The Chinese Academy of Sciences, Beijing\ 100083, china) Lab. of Semicond. Mater. Sci. Inst. of Semiconductors Chinese Acad. of Sci. Beijing 100083 China

A review on the research and development of electronic and optoelectronic materials in china, including the main scientific activities in this field, is presented. The state\|of\|the\|arts and prospects of the electronic and optoelectronic materials in china are briefly introduced, such as those of silicon crystals, compound semiconductors, synthetic crystals,especially nonlinear optical crystals and rare\|earth permanent magnets materials, etc., with a greater emphasis on Chinese scientist’s contributions to the frontier area of nanomaterials and nanostructures in the past few years. A new concept of the trip chemistry proposed by *** Zhongfan from Peking University has also been described. Finally the possible research grants and the national policy to support the scientific research have been discussed.

关键词：电子材料光电子材料压力材料研究进展

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A local spin evaluation into the active site models of [2Fe2S] ferrodoxin [Fe_2S_2(SR)_4]^(2-) (R=-H, -CH_3)

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Science china Chemistry 2007年第3期50卷 327-334页

作者： WEI JiChong1,2, WANG Yan3 & JU GuanZhi2,3 1 Department of Chemistry, Hainan Normal University, Haikou 571158, china 2 State Key Laboratory of Theoretical and Computational Chemistry, Jilin University, Changchun 130023, china 3 Department of Chemistry, Nanjing University, Nanjing 210093, china 1. Department of Chemistry Hainan Normal University Haikou 571158 China 2. State Key Laboratory of Theoretical and Computational Chemistry Jilin University Changchun 130023 China 3. Department of Chemistry Nanjing University Nanjing 210093 China

To test the feasibility of local spin theory of Davidson and Clark for ferrodoxin clusters, the models [Fe2S2(SR)4]2- (R=-H, -CH3) are chosen for evaluation. This purpose is realized by calculating the local spin expectation values , , and mA and discussing the connection between these expected values and the Heisenberg spin model (HSM) and the Noodleman broken-symmetry approach. In practical calculation, the spin-unrestricted Hartree-Fock (UHF) and spin-polarized density functional theory (DFT) are used and the calculational qualities of these two methods are also discussed. In addition, the theoretical magnetic coupling constants JAB of these models are calculated by various computational schemes for comparison with both theoretical and experimental results previously reported.

关键词： local spin iron-sulfur protein model density function theory magnetic coupling constant

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Surface Topography of Fine-grained ZrO_2 Ceramic by Two-dimensional Ultrasonic Vibration Grinding

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Journal of Wuhan University of Technology(Materials Science) 2011年第6期26卷 1162-1165页

作者：丁爱玲 School of Mechanical and Automation Engineering North University of China

The surface quality of fine-grained ZrO2 engineering ceramic were researched using 270# diamond wheel both with and without work-piece two-dimension ultrasonic vibration grinding（WTDUVG）. By AFM images, the surface topography and the micro structure of the two-dimensional ultrasonic vibration grinding ceramics were especially analyzed. The experimental results indicate that the surface roughness is related to grinding vibration mode and the material removal mechanism. Surface quality of WTDUVG is superior to that of conventional grinding, and it is easy for two-dimensional ultrasonic vibration grinding that material removal mechanism is ductile mode grinding.

关键词： two-dimension ultrasonic vibration grinding surface topography ductile grinding

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Analysis of spatio-temporal pattern and driving force of land cover change using multi-temporal remote sensing images

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Science china(Technological Sciences) 2010年第S1期53卷 111-119页

作者： ZHOU QiMing & SUN Bo Department of Geography,Hong Kong Baptist University,Hong Kong,china 1. Department of Geography Hong Kong Baptist University Hong Kong China

Landuse and land cover change is regarded as a good indicator that represents the impact of human activities on earth’s *** the large collection of multi-temporal satellite images has become available,it is possible to study a long-term historical process of land cover *** study aims to investigate the spatio-temporal pattern and driving force of land cover change in the Pearl River Delta region in southern china,where the rapid development has been witnessed since *** fast economic growth has been associated with an accelerated expansion of urban landuse,which has been recorded by historical remote sensing *** paper reports the method and outcome of the research that attempts to model spatio-temporal pattern of land cover change using multi-temporal satellite *** classified satellite images were compared to detect the change from various landuse types to built-up *** trajectories of land cover change have then been established based on the time-series of the classified land cover *** correlation between the expansion of built-up areas and selected economic data has also been analysed for better understanding on the driving force of the rapid urbanisation *** result shows that,since early 1990s,the dominant trend of land cover change has been from farmland to urban *** relationship between economic growth indicator(measured by GDP)and built-up area can well fit into a linear regression model with correlation coefficients greater than *** is quite clear that cities or towns have been sprawling in general,demonstrating two growth models that were closely related to the economic development stages.

关键词： remote sensing change detection multi-temporal image processing spatio-temporal analysis land cover change Pearl River Delta urban expansion

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Ultra-microbes are the minerogenetic constructors of oceanic polymetallic nodules

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Chinese Science Bulletin 1997年第8期42卷 617-624页

作者： CHEN Jianlin, ZHANG Fusheng and BIAN Lizeng1 Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, china 2 Center for Materials Analysis, Nanjing University, Nanjing 210093, china 3. Department of Earth Sciences, Nanjing University, Nanjing 210093, china Second Institute of Oceanography State Oceanic Administration Hangzhou China Centu for Materials Analysis Nanjing University Nanjing China Department of Earth Sciences Nanjing University Nanjing China

Polymetallic nodules (mangnese nodules) are a typical kind of manganese oncolites The distribution of smooth sur-face and knobbly manganese nodules is closely related to the geological background of the mine field. A systematic study on their inner laminae structure and features suggests that they are the products of millions of years reproduction and accumulation of the recently found Miniactinomyces chinensis and Spirisophaerospora pacijica .

关键词： oceanic manganese nodule stromatolite ultra-microbe biolite.

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THEORETICAL ANALYSIS AND NUMERICAL SIMULATION OF TURBULENT FLOW AROUND SAND WAVES AND SAND BARS

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Journal of Hydrodynamics 2009年第2期21卷 292-298页

作者： LIU Shi-he XIONG Xiao-yuan LUO Qiu-shi State Key Laboratory of Water Resource and Hydropower Engineering Science Wuhan University Wuhan 430072 China School of Water Resource and Hydropower Wuhan University Wuhan 430072 China Changjiang River Administration of Navigation Affairs MC Wuhan 430014 China

Natural rivers usually possess sand waves and sand bars. In this article, the rapid distortion theory was used to study the turbulent flow over sand waves. The results show that the pre-existing sheafing motion and upstream anisotropy of the turbulence flow would have significant effect on the turbulent structures, and hence the memory effect should be taken into consideration. Furthermore, the 2-D mathematical model was employed to simulate the unsteady flow around the Taiping Sand Bar in the lower reach of the Yangtze River and the time step effect on the unsteady flow simulation with the implicit scheme was discussed at the same time. The results show that the implicit scheme keeps effective until the time step reaches a certain number, and the calculated water levels and velocities are in agreement with the observed data.

关键词： sand wave sand-bar rapid distortion theory numerical simulation

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