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Views on “Principle of limitation of physical quantities and cyclic universe”

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Science china(physics,Mechanics & Astronomy) 2010年第9期53卷 1772-1774页

作者： LI LianGang department of physics,School of Sciences,tianjin University,tianjin 3.0072,china tianjin University Department of Physics School of Sciences Tianjin China (GRID:grid.33763.32) (ISNI:***)

This paper presents an analysis of a paper entitled "Principle of limitation of physical quantities and cyclic universe" and proposes different results for some formulae from that *** addition,this paper shows that the principle of limits coupling may lead to an approximation of current theories(i.e.,quantum theory and relativistic theory),which have interesting correlations with the Plank formula and the special theory of relativity.

关键词： principle of limitation of physical quantities limits coupling formulae Plank formula theory of relativity

Low－Temperature　Spectral　Properties　and　Zero－Phonon　Transitions　of　Alkali　Halide　Crystal　Materials　Bombarded　with　Electrons　and　Implanted　with　Ions

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Chinese Journal of Lasers 1995年第2期B4卷 111-116页

作者： GU Hongen(department of Applied physics, tianjin University,{3., china) tianjin Univ Tianjin China

Ｌｏｗ－ＴｅｍｐｅｒａｔｕｒｅＳｐｅｃｔｒａｌＰｒｏｐｅｒｔｉｅｓａｎｄＺｅｒｏ－ＰｈｏｎｏｎＴｒａｎｓｉｔｉｏｎｓｏｆＡｌｋａｌｉＨａｌｉｄｅＣｒｙｓｔａｌＭａｔｅｒｉａｌｓＢｏｍｂａｒｄｅｄｗｉｔｈＥｌｅｃｔｒｏ... 详细信息

Ｌｏｗ－ＴｅｍｐｅｒａｔｕｒｅＳｐｅｃｔｒａｌＰｒｏｐｅｒｔｉｅｓａｎｄＺｅｒｏ－ＰｈｏｎｏｎＴｒａｎｓｉｔｉｏｎｓｏｆＡｌｋａｌｉＨａｌｉｄｅＣｒｙｓｔａｌＭａｔｅｒｉａｌｓＢｏｍｂａｒｄｅｄｗｉｔｈＥｌｅｃｔｒｏｎｓａｎｄＩｍｐｌａｎｔｅｄｗｉｔ...

关键词： zero-phonon transition. color centers

Low-temperature optical spectra and zero-phonon transition of color centers in γ-rayed lithium fluoride crystals

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Chinese Journal of Lasers 1993年第5期B2卷 59-63页

作者： Honggen Gu (department of physics, tianjin University,{3.,china) tianjin Univ Tianjin China

The zero-phonon lines on R2, R~+, N1and R′2centers and some new narrow lines have been observed in bivalent-metal-doped and air-grown LiF crystals irradiated by γ-ray in the temperature range of 9.5—13.K. The spect... 详细信息

关键词： low-temperature spectra zero-phonon transition color-centers in LiF2

Principle of limitation of physical quantities and cyclic universe

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Science china(physics,Mechanics & Astronomy) 2008年第5期51卷 451-458页

作者： HE GuoZhu department of physics,Nankai University,tianjin 3.0071,{3. department of physics Nankai University Tianjin China

A close study of Heisenberg uncertainty principles reveals many significant facts,and all four major physical quantities,energy,time,momentum and length,have both lower and upper ***,many questions come *** are these limits?Some answers may lead to the understanding of the development of our *** is the shortest limit of time?At the beginning of big bang,there exists a tre-mendously short time,the Planck *** may be just the shortest time limit in our *** longest time limit might be the lifetime of our *** longest length might be the final diameter of our expanding *** these lead to a finite *** more coupling formulae are formed for the other two pairs of physical quantities,mass and speed,thermal energy and *** four physical quantities must also have *** already knew that speed has upper limit and temperature has lower *** these two formulae,Planck and Einstein equations are derived *** most other physical quantities are somewhat related to these major physical quantities,it seems that there exists a principle of limitation of physical quantities.A quantitative sketch of big bang is *** also shows that our universe will contract back to another big *** principle of limitation opens up some fields of *** may bring nature back to the harmony and determined world described by classical physics.

关键词： principle of limitation of physical quantities limits coupling formulae cyclic universe extension of conven-tional quantum mechanics no uncertainty for physical quantities quantitative evaluation of big bang

Tunneling Through Black Rings

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Communications in Theoretical physics 2007年第5期47卷 835-842页

作者： ZHAO Liu department of physics,Nankai University,tianjin 3.0071,{3. department of physics Nankai University

Hawking radiation of black ring solutions to 5-dimensional Einstein-Maxwell-dilaton theory is analyzedby use of the Parikh-Wilczek tunneling *** get the correct tunneling amplitude and emission rate,we adoptand develop the Angheben-Nadalini-Vanzo-Zerbini covariant approach to cover the effects of rotation and electronicdischarge all at once,and the effect of back reaction is also taken into *** constitutes a unified approach tothe tunneling *** the first law of thermodynamics for black rings holds,the emission rate is proportionalto the exponential of the change of Bekenstein-Hawking *** calculation for black ring temperatures agreesexactly with the results obtained via the classical surface gravity method and the quasi-local formalism.

关键词： black ring radiation tunneling method

Online diagnosis of electron excitation temperature in CH_4+H_2 discharge plasma at atmospheric pressure by optical emission spectra

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Science china(physics,Mechanics & Astronomy) 2008年第12期51卷 1892-1896页

作者： CUI JinHua1, XU ZhenFeng2, ZHANG JiaLiang3., NIE QiuYue3. XU GenHui4 & REN LongLiang5 1 Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116021, china 2 Technique Center for Modern Education, Liaodong college, Dandong 126709, china 3.State Key Laboratory for Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian 116023. china 4 college of Chemical Engineering, tianjin University, tianjin 3.0072, china 5 department of physics, Science college, tianjin University, tianjin 3.0072, china Faculty of Chemistry and Chemical Engineering Liaoning Normal University Dalian China Technique Center for Modern Education Liaodong College Dandong China State Key Laboratory for Materials Modification by Laser Ion and Electron Beams Dalian University of Technology Dalian China college of Chemical Engineering Tianjin University Tianjin China department of physics Science College Tianjin University Tianjin China

Methane coupling under low temperature plasmas at atmospheric pressure is a green process by use of renewable sources of energy. In this study, CH4+H2 dis- charge plasma was on-line diagnosed by optical emission spectra so as to char- acterize the discharge system and to do spade work for the optimization of the technical parameters for future commercial production of methane coupling under plasmas. The study was focused on a calculation method for the online diagnosis of the electron excitation temperature in CH4+H2 discharge plasma at atmospheric pressure. The diagnostic method is easy, efficient and fairly precise. A serious er- ror in a literature was corrected during the reasoning of its series of equations formerly used to calculate electron temperatures in plasmas.

关键词： low temperature plasma electron excitation temperature optical emission spectrum online diagnosis

Quantum Entanglement of Two Flux Qubits Induced by an Auxiliary SQUID

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Communications in Theoretical physics 2007年第12期48卷 1003-1008页

作者： SHI Tao SONG Zhi department of physics,Nankai University,tianjin 3.0071,{3. department of physics Nankai University

We revisit a theoretical scheme to create quantum entanglement of two three-level superconducting quantuminterference devices (SQUIDs) with the help of an auxiliary *** this scenario,two three-level systems are coupledto a quantized cavity field and a classical external field and thus form dark *** quantum entanglement can beproduced by a quantum measurement on the auxiliary *** investigation emphasizes the quantum effect of theauxiliary *** the experimental feasibility and accessibility of the scheme,we calculate the time evolution of thewhole system including the auxiliary *** ensure the efficiency of generating quantum entanglement,relationsbetween the measurement time and dominate parameters of the system are analyzed according to detailed calculations.

关键词： superconducting quantum interference device entangled state quantum information dark state

Laser glazing study of Co-based alloy and Ni-Nb-Cr alloy coating

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Chinese Journal of Lasers 1994年第4期B3卷 377-384页

作者： TIAN Nailiang(department of Applied physics,tianjin Institute of Science and Technology, tianjin 3.0191,china)YANG Yongqiang(department of Mechanics, tianjin Institute of Textile Science and Technology,tianjin 3.0160, china) tianjin Inst of Science and Technology Tianjin China

ＬａｓｅｒｇｌａｚｉｎｇｓｔｕｄｙｏｆＣｏ－ｂａｓｅｄａｌｌｏｙａｎｄＮｉ－Ｎｂ－Ｃｒａｌｌｏｙｃｏａｔｉｎｇ￥ＴＩＡＮＮａｉｌｉａｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＰｈｙｓｉｃｓ，ＴｉａｎｊｉｎＩｎｓｔｉ... 详细信息

ＬａｓｅｒｇｌａｚｉｎｇｓｔｕｄｙｏｆＣｏ－ｂａｓｅｄａｌｌｏｙａｎｄＮｉ－Ｎｂ－Ｃｒａｌｌｏｙｃｏａｔｉｎｇ￥ＴＩＡＮＮａｉｌｉａｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＰｈｙｓｉｃｓ，ＴｉａｎｊｉｎＩｎｓｔｉｔｕｔｅｏｆＳｃｉｅｎｃｅａｎｄＴ...

关键词： Metallic glass cladding layer Co-based

The improvement of turbulence modeling for the aerothermal computation of hypersonic turbulent boundary layers

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Science china(physics,Mechanics & Astronomy) 2010年第2期53卷 369-379页

作者： DONG Ming & ZHOU Heng department of Mechanics,tianjin University,tianjin {3.,china tianjin University Department of Mechanics Tianjin China (GRID:grid.33763.32) (ISNI:***)

The engineering computation of turbulent flows is mainly based on turbulence modeling,however,accurate aerothermal computation of hypersonic turbulent boundary layers is still a not well-solved problem. Aerothermal computation for turbulent boundary layers on a supersonic or hypersonic blunt cone with small bluntness is done firstly by using both direct numerical simulation and BL model,and seven different cases are investigated. Then the results obtained by the two methods are compared,and the reason causing the differences is found to be the incorrect assumption in the turbulence modeling that the ratio between eddy heat conductivity and eddy viscosity is constant throughout the whole boundary layer. Based on certain theoretical arguments,a method of modifying the expression of eddy heat conductivity in the region surrounding the peak location of the turbulent kinetic energy is proposed,which is verified to be effective,at least for the seven cases investigated.

关键词： hypersonic turbulent boundary layer aerothermal supersonic cone direct numerical simulation(DNS) BL model coefficient of eddy heat conductivity