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Exact Solution in the New Inflation Scenario with Induced gravity

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Communications in Theoretical Physics 2001年第10期36卷 509-512页

作者： WANG Wen-Fu Department of Industrial Automation Southwest Petroleum Institute Nanchong 637001 Sichuan Province China

Taking the Hubble parameter directly as a function of the scalar field instead of as a function of time,H = H( ), we present a new exact solution in the new inflation model with induced gravity. This includes solution which is inflation for end, and develops smoothly towards radiation-like evolution for ≥ end. The inflation is driven by the evolution of the field with inflation potential, V( ) = λ 2 v2)***, ns, is computed and ns lies well inside the limits set by the cosmic background explorer (COBE) *** dex of the scalar effective cosmological constant Aeff tends to zero when inflation ends.

关键词： induced gravity, new inflation, exact solution, spectral indices, effective cosmological constant

Relation between gravity Field Feature and Tectonics and Earthquakes in Taiwan and Its Adjacent Seas

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Marine Science Bulletin 2001年第2期3卷 63-72页

作者： Zhang Chijun(张赤军) Fang Jian(方剑) Institute of Geodesy and Geophysics Chinese Academy of Sciences Wuhan 430077 Institute of Geodesy and Geophysics Chinese Academy of Sciences Wuhan 430077

Short wave gravity anomaly is correlated to sea floor topography in the gravity field of ×Taiwan and its adjacent seas. gravity values of 20010-5ms-2 at Yushang and -×16010-5ms-2 at Liuqiu sea trench are respectively the maximum and minimum gravity values in this area. Bouguer gravity anomaly reflects not only Moho interface undulation, but also fault distribution. The inflexion of gradient belt of Bouguer gravity anomaly is a spot liable to earthquakes . Middle-long wave geoid is the best data to invert crustal thickness. We calculate crustal thickness by using geoid data, and the maximum value is 38km; the minimum value is 12km in Taiwan and its adjacent seas.

关键词： Taiwan, gravity, crustal Thickness, earthquake activity

Unification of Non-Abelian SU(N) Gauge Theory and Gravitational Gauge Theory

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Communications in Theoretical Physics 2002年第10期38卷 455-460页

作者： WU Ning Institute of High Energy Physics P.O. Box 918-1 Beijing 100039 China

In this paper, a general theory on unification of non-Abelian SU(N) gauge interactions and gravitationalinteractions is discussed. SU(N) gauge interactions and gravitational interactions are formulated on the similar basisand are unified in a semi-direct product group GSU(N). Based on this model, we can discuss unification of fundamentalinteractions of Nature.

关键词： quantum gravity, unified field theory, gauge field theory

Seasonal water storage change of the Yangtze River basin detected by GRACE

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Science China Earth Sciences 2006年第5期49卷 483-491页

作者： 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 Center for Astro-geodynamics Research Shanghai Astronomical Observatory National Astronomical Observatories Shanghai China Center for Space Research University of Texas at Austin Austin USA

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

关键词： GRACE, earth gravity, water storage, Yangtze River basin.

Unification of Electromagnetic Interactions and Gravitational Interactions

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Communications in Theoretical Physics 2002年第3期38卷 322-326页

作者： WU Ning Institute of High Energy Physics P.O. Box 918-1 Beijing 100039 China

Unified theory of gravitational interactions and electromagnetic interactions is discussed in this *** on gauge principle, electromagnetic interactions and gravitational interactions are formulated in the same mannerand are unified in a semi-direct product group of U(1) Abelian gauge group and gravitational gauge group.

关键词： quantum gravity, unified field theory, gauge field theory

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