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| 1 | ^(40)Ar/^(39)Ar dating of shear deformation of the Xianshuihe fault zone in west Sichuan and its tectonic significance显示文摘Based on field geological survey, structural measurements and classical Ar/Ar dating of mica, biotite and K-feldspar, we obtain cooling ages for Miocene left-lateral shear along the Xianshuihe fault zone. The results document two thermal events during the sinistral shear. The early event (12-10 Ma) corresponds to rapid cooling of the Zheduoshan granitic massif from above 700℃ to below 350℃. The late event (5-3.5 Ma) corresponds to cooling of granites intruded along the eastern side of the fault zone. These dating results provide important thermochronological constraint on the timing of late Cenozoic eastward extrusion of the Chuan-Dian Block in the SE Tibetan margin. | ZHANG Yueqiao1, CHEN Wen2, 3 & YANG Nong1 1. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China 2. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China 3. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China | 2004 | Science China Earth Sciences2004，47，9： | 27 |
| 2 | Discovery of low grade metamorphic volcanic rock sheets within UHP in Dabie Mts. and its implications显示文摘THE ultrahigh-pressure metamorphic zone (UHP), outcropping in the central and southernDabie Mts. with an area of about 1000 km^2, may be the largest one in the world. The forma-tion and exhumation mechanism of the UHP rocks become a hot point in the study of continen-tal orogen. The first finding of the Shiqiao structural window, which is composed of low | DONG Shuwen, WANG Xiaofeng and HUANG Dezhi1. Chinese Academy of Geological Sciences (CAGS), Beijing 100037, China 2. Institute of Geomechanics of CAGS, Beijing 100081 China 3. Anhui Institute of Geological Sciences, Hefei 230001 | 1997 | Chinese Science Bulletin1997，42，14： | 10 |
| 3 | Carbon isotopic studies of individual lipids in organisms from the Nansha sea area, China显示文摘Carbon isotopes of individual lipids in typical organisms from the Nansha sea area were measured by the GC-IRMS analytical technique. d 13C values of saturated fatty acids in different organisms examined are from -25.6 to -29.7 with the average values ranging from -26.4 to -28.2 and the variance range of 1.8 between different organisms is also observed. Unsaturated fatty acids have heavy carbon isotopic compositions and the mean differences of 2.9—6.8 compared to the same carbon number saturated fatty acids. d 13C values of n-alkanes range from -27.5 to -29.7 and their mean values, ranging from -28.6 to -28.9, are very close in different organisms. The mean difference in d 13C between the satu-rated fatty acids and n-alkanes is only 1.5, indicating that they have similar biosynthetic path-ways. The carbon isotopic variations between the different carbon-number lipids are mostly within 2.0, reflecting that they experienced a biosynthetic process of the carbon chain elon-gation. At the same time, the carbon isotopic genetic relationships between the biological and sedimentary lipids are established by comparative studies of carbon isotopic compositions of individual lipids in organisms and sediments from the Nansha sea area, which provides scientific basis for carbon isotopic applied research of individual lipids. | DUAN Yi1,2, SONG Jinming3 & ZHANG Hui1 1. Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou 730000, China 2. School of Geology, Lanzhou University, Lanzhou 730000, China 3. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China | 2004 | Science China Earth Sciences2004，47，7： | 10 |
| 4 | Simultaneously inducing synthesis of semiconductor selenium multi-armed nanorods and nanobars through bio-membrane bi-templates显示文摘Multi-armed nanorods and nanobars of semiconductor selenium were simultane- ously synthesized in the light of biomineralization process through bio-membrane bi-templates of rush at room temperature. The multi-armed nanorods are 60 nm in diameter and 1.5 μm in length; the nanobars are 150 nm in diameter and 1000—1100 nm in length. The XRD pattern indicates that these nanocrystals were crystallized in the hexagonal structure with lattice constants a = 0.437 nm, c = 0.495 nm. The possible formation mechanism was investigated. | LI Li1, WU Qingsheng1 DING Yaping2 & LI Ping3 1. Department of Chemistry, Tongji University, Shanghai 200092, China 2. Department of Chemistry, Shanghai University, Shanghai 200436, China 3. Department of Food, Anhui Agricultural University, Hefei 230036, China | 2004 | Science China Chemistry2004，47，6： | 3 |
| 5 | Parabolic equation of the m-Laplacian with nonlinear boundary condition显示文摘The existence and nonexistence of global positive weak solutions of parabolic equation of the m-Laplician with nonlinear boundary condition are dealt with. The necessary and sufficient conditions on the existence of all global positive weak solutions are obtained. | WANG Shu+ 1, 2, WANG Mingxin 3, XIE Chunhong 1 1. Department of Mathematics, Nanjing University, Nanjing 210093, China 2. Department of Mathematics, Henan University, Kaifeng 475001, China 3. Department of Applied Mathematics, Southeast University, | 1998 | Chinese Science Bulletin1998，43，11： | 3 |
| 6 | The regular representation and regular covariant representation of crossed products of Woronowicz C^(*)-algebras显示文摘In this paper, it is shown that the regular representation and regular covariant representation of the crossed products A×α G correspond to the twisted multiplicative unitary operators, where A is a Woronowicz C*-algebra acted upon by a discrete group G. Meanwhile, it is also shown that the regular covariant C*-algebra is the Woronowicz C*-algebra which corresponds to a multiplicative unitary. Finally, an explicit description of the multiplicative unitary operator for C(SUq(2))×α Z is given in terms of those of the Woronowicz C*-algebra C(SUq(2)) and the discrete group G. | ZHANG Xiaoxia~(1,2) & GUO Maozheng~(1,3) 1. School of Mathematical Sciences,Peking University,Beijing 100871,China 2. Department of Mathematics,Yantai University,Yantai 264005,China 3. LMAM,Peking University,Beijing 100871,China | 2005 | Science China Mathematics2005，48，9： | 1 |
| 7 | RELATIONSHIP BETWEEN THE VARIATION OF LUNISOLAR TIDAL FORCE AND EARTHQUAKES IN TAI WAN | Zhao Juan 1,3 , Han Yanben 2,3 and Li Zhian 1 (1. Department of Astronomy, Beijing Normal University, Beijing 100875, China 2. Beijing Observatory, CAS, Beijing 100012, China 3. National Astronomical Observatory, CAS, Beijing 100012, China | 2002 | Natural Disaster Reduction in China2002，，2： | 1 |
| 8 | Geochemistry and environment evolution of Core E in the Laizhou Bay since last stage of Middle Pleistocene显示文摘Geochemistry analysis has been done on Core E (37 07’ N, 118 55’ E; depth: 82.1 m) taken from the Laizhou Bay in 1994. Nine kinds of invariable elements, 15 kinds of microelements and the content of lime carbonate are measured by means of ICP. The results indicate that most of the invariable elements and microelements in Core E show significant changes in the boundary stratotype, and the ratios between elements (Mn/Fe, Sr/Ba, Ti/Al) in particular. So they can be used as characteristic indicator to stratigraphic division of Quaternary. The changes of invariable elements are primarily controlled by the host minerals, and they mainly indicate the provenance as well as the sedimentation and depositional environment. Several elements, such as Fe, Al, Ca, Mg, Mn and Ti, are very sensitive to the provenance and environment. The distribution of microelements differs in four depositional periods: last stage of Middle Pleistocene, last interglacial period, last glacial period and Recent epoch, and especially in the 'cold period' and 'warm period'. The loops in the cycle curves of the most microelements correspond with the sand bed sediments, among which there are six sand units representing 'warm period' sediments, and one representing 'cold period' sediments. The carbonate is on the high side in the aeolian silt sediments formed in the glacial lowering of sea level in Core E, but on the low side in the transgressive sand beds formed in the interglacial period. The content variation of carbonate has a direct bearing on the grain size and the styles of sediments, and is a good indicator to the climate, environment and stratigraphic division. | Han Deliang, Yu Hongjun, Li Guanbao 1. Ocean University of Qingdao, Qingdao 266003, China 2. First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China 3. Institute of Oceanology. Chinese Academy of Sciences. Qingdao 266 | 2001 | Acta Oceanologica Sinica2001，20，3： | 1 |
| 9 | A new method for imaging faint objects nearby a bright source显示文摘In astronomical observation, it is difficult to obtain the image of faint objects in the peripheral area around a bright celestial body. in order to solve the problem, a new method is designed and experimented, which is called the separation readout technique (SRT). SRT is different from either the traditional coronagraphy or the newly-developed anti-blooming CCD technique, and allows an enough-long exposure to the faint objects in the area around a bright celestial body with the well-preserved bright body’s image in one frame. This paper describes in detail the principle of SRT, the computer simulation, the experimental devising and result of SRT observation on a telescope. | YE Binxun & CHU Yi1. Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing 100012, China 2. NAOCAS, Beijing 100012, China 3. Department of Astronomy, Nanjing University, Nanjing China Correspondence should be addressed to Ye Binxun | 2000 | Chinese Science Bulletin2000，45，3： | 1 |
| 10 | The Implementation Methods for Computer Aided Design and Analysis on Color-Woven Fabrics显示文摘Methods for computer aided design and analysis on color-woven fabrics are presented. The relation of color pattern, colored warp, colored weft and the model for regular weave texture are given based on their formative principle. Some efficient algorithms are developed to determine the color order of warp and weft threads which yields a given color pattern and regular weave texture. Finally, the design system structure and data process flowing are introduced. | Dong Yude1, 2 Zhao Han2 Sun Jieting3 1. University of Science and Technology of China, Hefei 230052, China 2. HeFei University of Technology, Hefei 230009, China 3. AnHui Vocational Institute of Textile , Hefei, 230052, China | 2002 | Computer Aided Drafting,Design and Manufacturing2002，12，1： | 0 |
| 11 | Robust Fault Diagnosis of Analog Circuits with Tolerances显示文摘A method for robust analog fault diagnosis using hybrid neural networks is proposed. The primary focus of the paper is to provide robust diagnosis using a mechanism to deal with the problem of element tolerances and reduce testing time. The proposed approach is based on the fault dictionary diagnosis method and backward propagation neural network (BPNN) and the adaptive resonance theory (ART) neural network. Simulation results show that the method is robust and fast for fault diagnosis of analog circuits with tolerances. | Ying Deng1, Yigang He1 , Xu He2 ,Yichuang Sun3 1. College of Electrical and Information Engineering,Hunan University, 410082, Changsha, Hunan, China 2. Department of Computer Science, Hunan University, 410082, Changsha, Hunan, China 3. Department of Ele | 2000 | 湖南大学学报(自然科学版)2000，27，S2： | 0 |
| 12 | A Note on Abelian Extensions显示文摘Let K Q be any abelian extension where Q is the field of rational numbers. By Galois theory and the Frobenius formula for induced characters, we prove that there exists a meta- belian group G and an irreducible character χ of G such that K = Q ( χ). | YU Chuxiong1,2, FAN Yun3 1. School of Mathematics and Statistics, Wuhan University, Wuhan 430072, Hubei, China 2. School of Mathematics and Computer Science, Jianghan University, Wuhan 430056, Hubei, China 3. School of Mathematics and Statistics, Huazhong Normal University, Wuhan 430079, Hubei, China | 2008 | Wuhan University Journal of Natural Sciences2008，13，1： | 0 |
| 13 | Statistical Inference for Simple Tree Order in the Means of Stochastic Order on Stratified Contingency Tables显示文摘In this paper, we consider testing the hypothesis that all multinomial populations in the stratified contingency table are identically distributed against the alternative that all these popula-tions are in simple tree order. We provide an asymptotic represen-tation of the order-restricted maximum likelihood estimate of the unknown parameters. The resulting estimators are proven to be n-consistent and asymptotically normal under appropriate con-ditions. A chi-squared test method is used for this hypothesis test problem. A real data set is applied to illustrate our theoretical result. | YAN Guoyi1,2, CHEN Jingjing3 1.School of Mathematics and Statistics, Wuhan University, Wuhan 430072, Hubei, China 2. School of Sciences, Wuhan Institute of Technology, Wuhan 430074, Hubei, China 3. School of Sciences, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China | 2010 | Wuhan University Journal of Natural Sciences2010，15，2： | 0 |
| 14 | R & D Strategy of High Technology Industry显示文摘In a symmetrical static game model, this paper is mainly concerned with the research and development (R&D) strategy of the High Technology (HT) industry and the society’s optimal R&D level given the investment revenue. We obtain different investment decision with different amount of firms engaging in the R&D and each firm’s expected profit respectively. When the risk (the probability each firm succeed) is not random, it’s socially desirable to have more firm engaging in R&D if and only if the relationship among the invest cost, the probability and the prize satisfies some condition, that is, Eπ s(n)≥Eπ s(n-1)I≤α(1-α) n-1 V . When the R&D cost I is certain, more prizes or higher probability will make more firms engage in the R&D and higher prize makes it’s socially desirable to have more firm invest in R&D. | Lu Jia\|hua 1,2 , Wang Yan 3 1. Wuhan University Journals Press,Wuhan 430072, Hubei, China 2. School of Computer,Wuhan University,Wuhan 430072,Hubei,China 3. School of Mathematics and Statistics, Wuhan University , Wuhan 430072, Hubei, China | 2003 | Wuhan University Journal of Natural Sciences2003，8，03A： | 0 |
| 15 | Analysis on the Influence of Spring Low Temperature on the Agriculture and the Formation Reason in Liaoning Province in 2010显示文摘[Objective] The research aimed to study the influence of spring low temperature on the agriculture and the formation reason in Liaoning Province in 2010. [Method] Based on the synoptics analysis principle, by analyzing the atmospheric circulation situation and satellite cloud map, the influence of spring low temperature on the agriculture and the formation reason of low temperature weather in Liaoning Province during April-May, 2010 were discussed. [Result] The high-altitude situation analysis showed that it was two-trough-two-ridge situation in the high latitude of Eurasia in April, 2010. Ural Mountains high-pressure ridge strengthened to move eastward. Lake Baikal cold air went down toward the southeast along the front of ridge and strengthened into the cold vortex. Liaoning was in the front of cold vortex. Affected by the cold vortex, the temperature in Liaoning area was low. In the first dekad of May, 2010, the activity of cold air was frequent. There were two times cold vortex influence, and the temperature was still low. In the later period of middle dekad of May, the warm ridge entered, and the temperature rose. The high-altitude trough and the low-level jet were the main system and the dynamic condition of precipitation generation respectively. The cold vortex was the main reason of spring continuous low temperature generation, and the secondary reason was the more precipitation. [Conclusion] The research provided the reference basis for the prevention and prediction of spring low temperature in Liaoning Province. | HAN Xiu-jun1, YU Xiao-li2, WANG Gui-chun3 1. Liaoning Meteorological Observatory, Shenyang 110016, China 2. Dalian Meteorological Bureau in Liaoning Province, Dalian 116001, China 3. Jinzhou Meteorological Bureau in Dalian City of Liaoning Province, Jinzhou 116100, China | 2011 | Meteorological and Environmental Research2011，2，4： | 0 |
| 16 | Research and Demonstration of Direct Air-Cooling System for 600-MW Fossil-Fired Power Plants显示文摘Given the distribution feature of resources such as coal and water, the requirements for the development of Chinese power industry, and the fact of monopoly by foreign companies, it is very necessary and significant to independently research and develop air-cooling technologies. Through experimental research, simulative calculation, process and equipment development, field tests and a demonstration project, the design and operation technologies for air-cooling system are grasped and relevant key equipment is developed. The results of the demonstration project show that the technical indicators for the air-cooling system have met or exceeded the design requirements. Part of the research results have been incorporated into the relevant national design standards. The technologies developed have been applied to more than 23 sets of thermal power units of or above 600 MW in China. | Zhang Xiaolu 1 , Wang Jianping 2 , Hu Zhenling 3 1. China Power Investment Corporation 2. China Power Engineering Consulting Group Corporation 3. Harbin Air Conditioning Co., Ltd., | 2011 | Electricity2011，22，4： | 0 |
| 17 | Effect factors of wear particles deposition in the ferrogram based on grey relative analysis显示文摘In this paper, a lot of ferrographic experiments have been made by means of rotary fer-rograph and ferroscope. The oil sample of the experiments has been collected from slip diesel en-gines. The data of the experiments has been analyzed based on grey relative analysis and relativeorder. The result of grey relative analysis shows that the effect of the dilution ratio of the oil sampleis the most key factor, in which the volume and the dilution ratio of the oil sample, and the effect ofthe rotation speed of the magnetic disc on the deposition state of wear particles are investigated.This conclusion is in accordance with the orthogonal experiment based on the same oil sample. Itprovides a new practical method for ferrographic experimental analysis. | LIU Ying WEN Shizhu CHEN Dingfang 1. Nanchang University, Nanchang 330029, China 2. Tsinghua University, Beijing 100084, China 3. Wuhan University of Technology, Wuhan 430063, China | 2001 | Science China Mathematics2001，44，S1： | 0 |
| 18 | Direct CP violation in hadronic B decays显示文摘There are different approaches for the hadronic B decay calculations, recently. In this paper, we upgrade three of them, namely factorization, QCD factorization and the perturbative QCD approach based on kT factorization, using new parameters and full wave functions. Although they get similar results for many of the branching ratios, the direct CP asymmetries predicted by them are different, which can be tested by recent experimental measurements of B factories. | HONG Bihai1,2 & Lü Caidian3 1. Department of Physics, Lishui University, Lishui 323000,China 2. Department of Physics, Shanghai Jiaotong University, Shanghai 200030, China 3. Institute of High Energy Physics, Beijing 100049,China | 2006 | Science China(Physics,Mechanics & Astronomy)2006，49，3： | 0 |
| 19 | Study on the two and three-parameter working stability regions of 3Y-TZP suspension显示文摘We determined the variation tendency of viscosity (η) at various solids load- ing (α) for 3Y-TZP suspension as a function of dispersant concentration (Cw) using vis- cosity measurement, measured the diameter of particles as a function of Cw in very dilute suspension using light scattering method, and obtained the surface features of the sedi- ment of suspension with different Cw using SEM. We also discussed the influence of the microstructure of adsorbed polymer layers on particles and their interactions in the dis- persing medium on the stability of suspension. Then two different stable states and two different unstable states for 3Y-TZP suspension were given. Accordingly, the (Cw, η), (Cw, α), and (α, η) two-parameter, and (Cw, α, η) three-parameter stability maps were con- structed. Based on the DLVO theory calculations, the dispersant concentration, particle distance (r), and interparticle potential energy (VT) maps with various solids loading for 3Y-TZP aqueous suspension were also constructed. In (Cw, r) two-parameter coordinate system, the stable motion region map for particles was established. The Cw, α, and VT,max (the highest potential energy) surface of the potential barrier map was obtained through calculation and simulation on the basis of the surfaces of Cw, r, VT maps introduced above. The (Cw, α) two-parameter stability map was then obtained from the Cw, α, VT,max map. The results showed that this theoretical map can qualitatively prove the experimentally obtained results—the existence of different dispersed states of particles in suspension system and the variation tendency of suspension stability with changing each parame- ter—were reasonable. | CHEN Youqiang1, 2, ZHANG Xinni3, CHEN Sha’ou3 & QI Ping3 1. Department of Chemistry, Qingdao University, Qingdao 266071, China 2. Department of Chemistry, Tsinghua University, Beijing 100084, China 3. Department of Physics, Qingdao University, Qingdao 266071, China | 2006 | Science China(Technological Sciences)2006，49，5： | 0 |
| 20 | An Application of Rough Set Theory to Modelling and Utilising Data Warehouses显示文摘A data warehouse often accommodates enormous summary information in various granularities and is mainly used to support on-line analytical processing. Ideally all detailed data should be accessible by residing in some legacy systems or on-line transaction processing systems. In many cases, however, data sources in computers are also kinds of summary data due to technological problems or budget limits and also because different aggregation hierarchies may need to be used among various transaction systems. In such circumstances, it is necessary to investigate how to design dimensions, which play a major role in dimensiona1 mode1 for a data warehouse, and how to estimate summary information, which is not stored in the data warehouse. In this paper, the rough set theory is applied to support the dimension design and information estimation. | DENG Ming-rong1, YANG Jian-bo2, PAN Yun-he3 1. School of Management, Zhejiang University, Hangzhou 310028, China 2. Manchester School of Management, 1nstitute of Science and Technology, University of Manchester, M60 1QD, UK 3. Zhejiang University, Hangzho | 2001 | Journal of Systems Science and Systems Engineering2001，13，4： | 0 |
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