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| 1 | Seasonal water storage change of the Yangtze River basin detected by GRACE显示文摘US-Germany co-sponsered satellite gravimetry mission GRACE (Gravity Recovery And Climate Experiment), launched in March 2002, has been producing monthly time series of Earth gravity models up to degree and order of 120. The GRACE mission consists of two identical satellites flying on an almost polar orbit with an altitude of about 300-500 km and satelite-to-satellite ranging of about 220 km. Thanks to the payloads of space-borne GPS receivers, accelerometers and high-precision K-band satelite-to-satellite ranging mesurements, GRACE gravity models are expected to achieve more than one order of magnitude of improvement over previous models at spatial scales of a few hundred kilometers or larger. Recovery of surface mass re-distribution based on GRACE’s time-varying gravity models is applied to studies in solid Earth geophysics, oceanography, climatology and geodesy. At secular time scales, GRACE is expected to provide valuable information on global ice changes, whose variations have profound influences on global climate, and in particular, on sea level changes. At seasonal time scales, GRACE is expected to reveal surface water changes with an ac- curacy of less than 1 cm, or ocean bottom pressure changes with an accuracy of less than 1 mbar (1 mbar =102 Pa). These surface mass redistribution measurements would impove our understanding of the global and regional mass and energy cycles that are critical to human life. Using 15 GRACE monthly gravity models covering the period from April 2002 to December 2003, this study compares seasonal water storage changes recovered from GRACE data and hydrology models at global and regional scales, with particular focus on the Yangtze River basin of China. Annual amplitude of 3.4 cm of equivalent water height change is found for the Yangtze River basin with maximum in Spring and Autumn, agreeing with two state-of-the-art hydrology models. The differences between GRACE re- sults and model predictions are less than 1-2 cm. We conclude that satellite gravimetry has huge potentials in monitering water storage changes in large river basins such as Yangtze. | HU Xiaogong1, CHEN Jianli1,2, ZHOU Yonghong1, HUANG Cheng1 & LIAO Xinhao1 1. Center for Astro-geodynamics Research, Shanghai Astronomical Observatory, National Astronomical Observatories, Shanghai 200030, China 2. Center for Space Research, University of Texas at Austin, 3925 W. Braker Lane, Suite 200, Austin, TX78750, USA | 2006 | Science China Earth Sciences2006，49，5： | 29 |
| 2 | USING DISPLACED CONE REPRESENTATION IN DEA MODELS FOR NONDOMINATED SOLUTIONSIN MULTIOBJECTIVE PROGRAMMING显示文摘Concepts revolving around 'displaced cones' are used to extend the ideas of nondominated solutions in multiobjective programming. Necessary and sufficient conditions are formed around the additive models of DEA to idelltify nondominated solutions. This provdes a basis for effecting contacts with other disciplines and other parts of DEA. | W. W. Cooper (Graduate School Of Business, University of Texas at Austin, Austin, Texas, USA 78712-1174)WEI Quanling (Department of Information Management, People’s University of China, Beliing 100872, China) G. Yu (Department of MSIS, University of Texas | 1997 | Systems Science and Mathematical Sciences1997，10，1： | 17 |
| 3 | DEGREE OF APPROXIMATION BY SUPERPOSITIONS OF A SIGMOIDAL FUNCTION显示文摘In this paper we study the degree of approximation by superpositions of a sigmoidal function.We mainlyconsider the univariate case.If f is a continuous function,we prove that for any bounded sigmoidalfunction σ,dn,σ(f)≤‖σ‖ω(f,1/(n+1)).For the Heaviside function H(x),we prove that dn,H(f)≤ω(f,1/(2(n+1))).If f is a continuous funnction of bounded variation,we prove that dn,σ(f)≤‖σ‖/(n+1)V(f)and dn,H(f)≤1/(2(n+1))V(f).For he Heaviside function,the coefficient 1 and the approximation orders are the bestpossible.We compare these results with the classical Jackson and Bernstein theorems,and make some conjec-tures for further study. | Chen Debao (University of Texas at Austin,USA) | 1993 | Analysis in Theory and Applications1993，9，3： | 11 |
| 4 | An Analysis of the Meaning of Generics | Mao Yi, Ph.D. of Philosophy received from the University of Texas at Austin, Master of Computer Sciences gained at UT-Austin. Zhou Beihai, Professor of Logic in the Department of Philosophy at Peking University, | 2003 | Social Sciences in China2003，24，3： | 4 |
| 5 | Plant litter decomposition in a semi-arid ecosystem controlled by photodegradation显示文摘 | Austin AT Vivanco L | 2006 | Nature2006，，442： | 1 |
| 6 | Effect of topical appli- cation of doxycyeline on pulp revascularization and periodontal healing in reimplanted monkey incisors 显示文摘 | Cvek M Cleaton-Jones P Austin J et at | 1990 | Endod Dent Trauma- tol1990，6，4： | 1 |
| 7 | Distribution of CYP17αpolymorphism and selected physiochemical factors of uterine leiomyoma in Barbados显示文摘 | Alleyne AT Austin S Williams A | 2014 | Meta Gene2014，9，2： | 1 |
| 8 | Water pulses and biogeochemical cycles in arid and semiarid ecosystems 显示文摘 | Austin AT Yahdjian L Stark JM Belnap J Porporato A Norton U Ravetta DA Schaeffer SM | 2004 | Oecologia2004，141，： | 1 |
| 9 | Nutrient dynamics on a precipitation gradient in Hawai'i显示文摘 | Austin AT Vitousek PM | | 0，，： | 1 |
| 10 | Coarse Woody Debris Stimulates Soil Enzymatic Activity and Litter Decomposition in an Old-Growth Temperate Forest of Patagonia, Argentina显示文摘 | Gonzalez-Polo M Ferna' ndez-Souto A Austin AT | 2013 | Ecosystems2013，16，6： | 1 |
| 11 | Nutrient dynamics on a precipitation gradient in Hawai’I 显示文摘 | Austin AT Vitousek PM | 1998 | Oecologia1998，113，4： | 1 |
| 12 | Glossary of terms for CT of the lungs: recommendations of the Nomenclature Committee of the Fleischner Society 显示文摘 | Austin JH Muller NL Friedman PJ et at | 1996 | Radiology1996，200，2： | 1 |
| 13 | Latin America's Nitrogen Challenge显示文摘 | Austin AT Bustamante MMC Nardoto GB | 2013 | Science2013，340，6139： | 1 |
| 14 | Water pulses and biogeochemical cycles in arid and semiarid ecosystems 显示文摘 | Austin AT Yahdjian L Stark JM Belnap J Porporato A Norton U Ravetta DA Schaeffer SM | 2004 | Oecologia2004，141，2： | 1 |
| 15 | Placement of esophageal self-expanding metallic stents without fluoroscopy 显示文摘 | Austin AS Khan Z Cole AT | 2001 | Gastrointest Endosc2001，54，3： | 1 |
| 16 | Dual role of lignin in plant litter decompositionin terrestrial ecosystems 显示文摘 | Austin AT Ballaré CL | 2010 | Proc Nat Acad Sci2010，107，10： | 1 |
| 17 | Placement of esophageal self-expanding metallic stents without fluoroscopy显示文摘 | Austin AS Khan Z Cole AT | 2001 | Gastrointest Endosc2001，54，： | 1 |
| 18 | Water pulses and biogeochemical cycles in arid and semiarid ecosystems显示文摘 | Austin AT Yahdjian L Stark JM Belnap J Porporato A Norton U Ravetta DA Schaeffer SM | 2004 | Oecologia2004，141，： | 1 |
| 19 | Intrinsic effects of species on leaf litter and root decomposition : a comparison of temperate grasses from North and South A- merica显示文摘 | Vivanco L Austin AT | 2006 | Oecologia2006，150，97： | 1 |
| 20 | Soil microbial community responses to multiple experi- mental climate change drivers显示文摘 | Castro HF Classen AT Austin EE Norby RJ Schadt CW | 2010 | Applied and Environmental Microbiology2010，76，4： | 1 |
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