搜索结果: 181-195 共查到“理学 universe”相关记录197条 . 查询时间(0.068 秒)
Quantum Creation of Closed Universe with Both Effects of
Tunnelling and Well
universe quantum creation tunnelling effect potential well effect
font style='font-size:12px;'>
2007/8/15
2001Vol.35No.5pp.635-638DOI:
Quantum Creation of Closed Universe with Both Effects of
Tunnelling and Well
ZHANG De-Hai
Department of Physics, Graduate School in Beijing,...
Future Destiny of Quintessential Universe and Constraint on
Model from Deceleration Parameter
quintessence equation of state inverse low index tracker
deceleration parameter
font style='font-size:12px;'>
2007/8/15
2002Vol.38No.2pp.253-255DOI:
Future Destiny of Quintessential Universe and Constraint on
Model from Deceleration Parameter
ZHANG De-Hai
Department of Physics, the Gradua...
European astronomers create largest-ever catalogue of gamma-ray sources in the universe（图）
gamma-ray
font style='font-size:12px;'>
2007/3/15
23 February 2007，Using data from the European Space Agency's latest orbiting gamma-ray observatory, Integral, a European team of astronomers led by Dr Antony Bird of the University of Southampton (UK)...
Full-spectrum study of small patch of sky yields portrait of maturing universe（图）
galaxies
font style='font-size:12px;'>
2007/3/12
6 March 2007，BERKELEY – A massive project to generate an all-color map of the galaxies in a small area of sky, utilizing four satellite telescopes and four ground-based telescopes, is yielding new inf...
Landmark Completion of South Pole Telescope to Help Scientists Learn What the Universe Is Made of and How it Got Here（图）
International Polar Year cosmological observations astrophysics
font style='font-size:12px;'>
2007/3/2
February 26, 2007，Just days before nations around the world were set to begin a coordinated global research campaign called the International Polar Year (IPY); scientists at the South Pole aimed a mas...
Cosmological Models of Universe with Variable Deceleration Parameter in Lyra's Manifold
Cosmology FRW universe Lyra geometry
font style='font-size:12px;'>
2010/10/13
FRW models of the universe have been studied in the cosmological theory based on Lyra’s manifold. A new class of exact solutions has been obtained by considering a time dependent displacement field fo...
national institute of standands and technology Math Technique Opens Clearer Window on Universe（图)
Math Technique Universe galaxies
font style='font-size:12px;'>
2006/12/11
December 7, 2006，A fast, efficient image enhancement technique developed at the National Institute of Standards and Technology (NIST) and originally applied to improving monochrome microscope images h...
Gravitational Clustering of Galaxies in an Expanding Universe
Gravitational clustering—thermodynamics—correlation function structure of universe
font style='font-size:12px;'>
2010/9/16
We inquire the phenomena of clustering of galaxies in an expanding universe from a theoretical point of view on the basis of thermodynamics and correlation functions. The partial differential equation...
Statement by Baruch S. Blumberg at the Opening of the Carl Sagan Center for the Study of Life in the Universe（图）
Astrobiology physics chemistry paleontology
font style='font-size:12px;'>
2006/12/8
November 30, 2006，Astrobiology is an exciting new scientific program and discipline that has been initially funded and encouraged by NASA. Today, we celebrate the formation of the Carl Sagan Center fo...
A Note on Cosmological Parameters and the Topology of the Universe
Cosmological Parameters the Topology of the Universe
font style='font-size:12px;'>
2010/10/15
Given the wealth of increasingly accurate cosmological observations, especially the recent results from the WMAP, and the development of methods and strategies in the search for cosmic topology, it is...
Gödel's Universe and Induced-Matter Theory
Gö del's Universe Induced-Matter Theory
font style='font-size:12px;'>
2010/10/18
We discuss G¨odel’s universe in the context of the induced-matter theory. We show that the problem of generating G¨odel’s metric from an extra dimension is equivalent to finding an embedding of G¨odel...
Dark Energy in the Universe, the Irreversibility of Time and Neutrinos
Dark Energy the Universe Time and Neutrinos
font style='font-size:12px;'>
2010/10/13
In this review, I discuss briefly how the presence of a cosmological constant in the Universe may imply a decoherent evolution of quantum matter in it, and as a consequence a fundamental irreversibili...
Small Scale Magnetic Field Evolution In The First Objects Formed In The Universe
Small Scale Magnetic Field Evolution The First Objects In The Universe
font style='font-size:12px;'>
2010/10/27
Large scale magnetic fields in galaxies are thought to be generated, by a mean field dynamo. In order to have generated the fields observed, the dynamo would have had to have operated for a sufficient...
Irreversible Processes and the Accelerated-Decelerated Phases of the Universe
Irreversible Processes the Accelerated-Decelerated Phases the Universe
font style='font-size:12px;'>
2010/10/26
A model for the Universe is proposed where it is considered as a mixture of scalar and matter fields. The particle production is due to an irreversible transfer of energy from the gravitational field ...
Inflation in a Flat Universe
Flat Universe Inflation
font style='font-size:12px;'>
2010/4/13
We started the evolution of a flat universe from a nonsingular state called prematter which is governed by an inflationary equation of state P=(g -1)r , where g represents the initial vacuum dominance...