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| 1 | Spatial heterogeneity of the driving forces of cropland change in China显示文摘By using digital satellite remote sensing data acquired in 1987―1989 and 1999―2000 and GIS combined with the natural and socio-economic data, this paper drew an integrated zonation of the cropland change and its driving forces in China. The results indicated that the cropland change in the study period was constrained by geographical factors and driven by cli-mate change as well as socio-economic system. Moreover, the regional differences of the drivers for cropland change were significant. In the midwest of China, natural condition changes and geographical background were the main constraints and drivers, while in Eastern China, social and economic changes and economic policies were the main driving forces. The cropland loss was nationwide. The dominant factors to cause this decrease included buildup of developing area to attract foreign capital and technologies, changes of industry structure due to urban in-fluence, the change of employment notions thanks to living standard improvement, rapid ur-banization due to the expansion of cities and towns, the diminished farming net income partly because of the global warming effects, and the rapid economic growth stimulated by the con-venient transportation system. These factors interact and interdepend with each other to cause the cropland loss in China recently. The reasons for the increase of cropland were primarily the cultivation and deforestation by the farmers who want to increase income. This study on the mechnism of LUCC relied on the cropland change integrated classification considering the natural or human factors both inside and outside the region, which provides a new approach to study the integrated regionalization and LUCC mechanism. | LIU Xuhua1,2, WANG Jinfeng1, LIU Mingliang4,1 & MENG Bin1,2,3 1. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China 2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China 3. College of Arts and Sciences of Beijing Union University, Beijing 100083, China 4. School of Forestry and Wildlife Sciences, Auburn University, Auburn, Alabama, AL36849, USA | 2005 | Science China Earth Sciences2005，48，12： | 13 |
| 2 | A heuristic path-estimating algorithm for large-scale real-time traffic information calculating显示文摘As the original Global Position System (GPS) data in Floating Car Data have the accuracy problem,this paper proposes a heuristic path-estimating algorithm for large-scale real-time traffic information calculating. It uses the heuristic search method,imports the restriction with geometric operation,and makes comparison between the vectors composed of the vehicular GPS points and the special road network model to search the set of vehicular traveling route candidates. Finally,it chooses the most optimal one according to weight. Experimental results indicate that the algorithm has considerable efficiency in accuracy (over 92.7%) and com-putational speed (max 8000 GPS records per second) when handling the GPS tracking data whose sampling rate is larger than 1 min even under complex road network conditions. | L WeiFeng1,ZHU TongYu1,WU DongDong2,DAI Hong3 & HUANG Jian1 1 State Key Laboratory for Software Development Environment,Beihang University,Beijing 100083,China 2 Beijing Transportation Information Center,Beijing 100055,China 3 College of Arts & Science,Beijing Union University,Beijing 100083,China | 2008 | Science China(Technological Sciences)2008，51，S1： | 7 |
| 3 | The central black hole masses for the γ-ray loud blazars显示文摘The Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope (formerly GLAST) provides an increase in sensitivity and has detected rapid variability of gamma-ray sources.The variability time scales detected from the gamma-ray loud blazars by LAT and EGRET,and gamma-ray luminosity are used to estimate the central black hole masses.In this work,we find that the lower limits of central black hole masses are in a range of (0.3-24)×107M⊙,which are compared with those obtained by other authors.Our results are consistent with other authors' results.Also,the Lorentz factor,Γ,and the propagation angle,θ,are obtained for 18 blazars for which superluminal motions are known. | YANG JiangHe1,2* & FAN JunHui2,3 1 Department of Physics and Electronics Science,Hunan University of Arts and Science,Changde 415000,China 2 Center for Astrophysics,Guangzhou University,Guangzhou 510405,China 3 Key Laboratory of Astronomy Observation and Technology,Guangzhou University,Guangzhou 510405,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，10： | 6 |
| 4 | Studies of low-lying states of even-even Xe isotopes within the nucleon pair approximation显示文摘We study the relevance of nucleon pairs with higher spins, in addition to spin-zero and spin-two pairs (i.e., S D pairs), in low-lying states of even-even Xe nuclei. By including those higher-spin pairs in our configuration, we recalculate energy level schemes, elec trical quadrupole moments, magnetic moments and electric quadrupole transition rates, for low-lying states of even-even 128-142Xe nuclei. The agreement between our calculated results and the experimental data is substantially improved in comparison with previous studies. | ZHANG LiHua1, JIANG Hui1,2 & ZHAO YuMin1,3,4 1Institute of Nuclear, Particle, Astrophysics and Cosmology, Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China 2School of Arts and Sciences, Shanghai Maritime University, Shanghai 200135, China 3Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China 4CCAST, World Laboratory, P.O. Box 8730, Beijing 100080, China | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，S1： | 5 |
| 5 | The line emissions and polarization in blazars显示文摘The correlations between broad-line emission,polarization,and core-dominance parameters are investigated for a sample of 148 blazars(BL Lacertae objects-BLs and flat spectrum radio quasars-FSRQs). An anti-correlation between the broad-line luminosity and the linear polarization is found. The broad-line and polarization relation can be explained by using a relativistic beaming model,which perhaps suggests that BL Lacs and FSRQs are a single class. We also investigated the relation between the ratio of the broad-line luminosity to the Eddington luminosity and linear polarization,and that between the ratio of the broad-line luminosity to the Eddington luminosity and the core-dominance parameter. | YANG JiangHe 1,2 ,FAN JunHui 2,3 & YANG RuShu 1 1 Department of Physics and Electronics Science,Hunan University of Arts and Science,Changde 415000,China 2 Center for Astrophysics,Guangzhou University,Guangzhou 510405,China 3 Key Laboratory of Astronomy Observation and Technology,Guangzhou University,Guangzhou 510405,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，6： | 4 |
| 6 | Entropy correction of charged black hole via fermions tunneling beyond semi-classical approximation显示文摘Motivated by the idea of tunneling beyond semi-classical approximation of Majhi et al., we discuss entropy correction of Dirac particles tunneling from the Reissner-Nordstrm black hole with a global monopole. To get the corrections correctly, we regard the proportionality constants of quantum correction terms to the semi-classical term of action as the inverse of the square of the Planck Length but not that of the Planck Mass. Our study shows that corrections to the Bekenstein-Hawking entropy, namely the logarithmic term and the inverse area term, may be reproduced as the quantum effect is considered. | ZENG XiaoXiong 1 , LI Ling 2 & HU XinYun 3 1 Journal of Sichuan University of Arts and Science, Dazhou 635000, China 2 Department of Maths and Finance-Economics, Sichuan University of Arts and Science, Dazhou 635000, China 3 Library of Sichuan University of Arts and Science, Dazhou 635000, China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，1： | 3 |
| 7 | Configural processing of different topologically structured figures:an ERP Study显示文摘According to Chen's theory, topological differences are perceived faster than feature differences in early visual perception. We hypothesized that topological perception is caused by the sensitivity in discriminating figures with and without 'holes' . An ERP experiment was conducted utilizing a passive paradigm to investigate the differences in perceiving figures with 'hole' and with 'no-hole' . The results showed differences in N170 components between figures with 'holes' and with 'no-holes' . The inversion of the 'hole' could influence the latency of N170, but the inversion of the 'no-hole' could not, which indicated that global features are processed first in the 'hole' perception whilst local features are given priority to the 'no-hole' perception. This result was similar to studies concerning face and non-face objects, suggesting a configural processing of the 'hole' . | ZHANG JunJun1, ZHU WeiNa2,3,4, DING XiaoJun1, ZHOU ChangLe1, HU XinTian2,3 & MA YuanYe2,3· 1 Lab of Mind, Art and Computation, Xiamen University, Xiamen 361005, China 2 Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming 650223, China 3 State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences, Beijing 1001001, China 4 School of Information Science, Yunnan University, Kunming 650223, China | 2009 | Science China(Life Sciences)2009，52，12： | 1 |
| 8 | Wall shear slress-an important determinant of endothelial cell function and stru- cture in the arterial syslem in viw显示文摘 | Reneman RS Arts 3' Hoeks AP | 2006 | J Vase Res2006，43，3： | 1 |
| 9 | An Aggregation Composition Compensation Method Based on Paired Net显示文摘With regard to the failure and cancellation of business logic of web services composition(WSC),this paper propose a novel web services transaction compensation mechanism based on paired net which can dynamically establish agile compensation-triggered process(CSCP-Nets),and satisfy prospective compensation requirements.The related execution semantics of five usual composition compensation patterns based on paired net are analyzed in the situations of successful execution,failure compensation and failure recovery.Paired net based application of trip reservation process(TRP) shows that it is feasible. | Xiao-Yong Mei 1,2 Yi-Yan Fan 2 Chang-Qin Huang 3 Ai-Jun Jiang 1 Shi-Xian Li 1 1 School of Information Science and Technology,Sun Yat-sen University,Guangzhou 510006,China 2 School of Computer Science and Technology,Hunan University of Arts and Science,Changde 415000,China 3 Department of Electrical Engineering and Computer Science,University of California,Irvine,CA,92697,USA | 2012 | International Journal of Automation and computing2012，9，5： | 0 |
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