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Particle tunnels across the horizon of Garfinkle-Horowitz-Strominger dilaton black hole

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Science china(physics,Mechanics & Astronomy) 2007年第5期50卷 601-610页

作者： FANG HengZhong1 & ZHAO Zheng2.1 department of physics,{2. university of Petroleum, Dongying 2.7061,{2. 2.department of physics, Beijing normal university, Beijing 100875,{2. department of physics China University of Petroleum Dongying China department of physics Beijing Normal University Beijing China

We promote the work of Parikh and Wilczek on the black hole radiation to the emission of massive and charged particles from Garfinkle-Horowitz-Strominger black hole. The energy and charge of the space-time are conservational during the course of the evaporation. The calculation shows that the emission spectrum is not precisely thermal, while has a correction, and the conclusion supports the view- point of information conservation.

关键词： Hawking radiation, black body spectrum, barrier, information loss, entropy of black hole, Komar energy

Ultrafine particles produced by evaporating FeB and Fe Si alloys

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西南师范大学学报(自然科学版) 1999年第5期 551-555页

作者： Li\ Jian,Qiu Xiaoyan,Zhao Baogang,Liu Cunye,Lin Yueqiang department of physics,{2. china normal university,chongqing 400715

Ultrafine particles were produced by evaporating Fe 90 B 10 in Ar or N 2.atmosphere and Fe 2.Si in N 2.atmosphere(at 133 3 Pa Pressure ) respectively. The phases,sizes,morphologies, magnetism and iron contents of the ultrafine particles were investigated and analyzed by means of transmission electron microscope (TEM),X ray diffraction (XRD) and vibrating samples magnetometer (VSM) at room temperature and chemical *** particles prepared from Fe 90 B 10 in Ar and taking the size of 6 nm,are poor *** particles prepared in N 2.taking the size of 8 nm are non crystal. The morphology of the Fe B particles is identically spherical *** size of Fe Si particles, whose contents are main α Fe and a few Fe 3Si,is about 2. *** magnetic measurement shows that all of the three kinds of particles are ferromagnetic,but the specific saturation magnetization and the maximum coercivity H c at room temperature are very different from iron *** the properties of the particles produced from same Fe based material but in different atmosphere (Ar or N 2. are different from that of particles produced from different Fe based material but in same N 2.*** may be connected with the activity of melting iron before evaporating out.

关键词： ultrafine particle Fe B alloy Fe Si alloy evaporating method

Entire vectors for unbounded normal operators and abstract Cauchy problems

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Chinese Science Bulletin 1997年第15期42卷 1253-1256页

作者： LI Yangrongdepartment of Mathematics, southwest normal university, {2. 630715, china department of Mathematics Southwest Normal University Chongqing China

LET A be a closed operator on a Banach space X, and C~∞ (A)=∩_n~∞=1,D(A^n). The C~∞ vec-tor x is an entire vector for A if sum from n=0 to ∞ (t^n)/(n!)||A^n x||0. We will write ε(A) for the set of all entire vectors for A. It is well known that the set of entire vectors for a self-adjoint operator is dense. Inthis note, we generalize this result to the situation of (unbounded) normal operators. We

关键词： C-semigroups analytic semigroups normal operators entire vectors.

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带间作用与超导转变温度

物理学报 2002年第5期51卷 1118-1121页

作者：曹天德西南师范大学物理系重庆400715

用格林函数方法研究d p模型 ,表明带间电子电子作用Udp导致超导并提升超导转变温度 ,而在位电子电子作用Ud 降低超导转变温度 .由于带间作用。

关键词：超导转变温度带间作用在位作用格林函数高温超导体

Non-universal Gauge Bosons Z'and the Process e~+e~- →f

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Communications in Theoretical physics 2004年第3期41卷 419-424页

作者： YUE Chong-Xing~1 WANG Shun-Zhi~2.1 department of physics,Liaoning {2. university,Dalian 11602.,china 2.College of physics and Information Engineering,Henan {2. university,Xinxiang 453002.china department of physics Liaoning Normal University Dalian 116029 College of physics and Information Engineering Henan Normal University Xinxiang 453002

Introduetion Altl、ough the standard model(SM)that bases on thega、lge gro、ip SU:(2.xU(1)has been sueeessful in de-seribing the Physies of eleetroweak interaetions,the meeh-anisn,of the eleetroweak symmetry breaking(... 详细信息

关键词： non-universal gauge bosons cross section TC2.models

Variation of Lasing Wavelength of Fiber Grating Semiconductor Laser with Temperature for Different External Cavity Lengths

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光学学报 2003年第S1期23卷 519-520页

作者： Zhengmao Wu, Hanqing Zhou, Guangqiong Xia, department of physics,{2., chongqing 400715, P. R. china, Tel: 86-2.-682.4609 department of physics Southwest Normal University Chongqing 400715 P. R. China

For different external cavity lengths, lasing wavelength variation of fiber grating external cavity semiconductor laser (FGECSL) with ambient temperature has been investigated theoretically, and the theoretical result... 详细信息

关键词： for on as WDM of Variation of Lasing Wavelength of Fiber Grating Semiconductor Laser with Temperature for Different External Cavity Lengths with

A study of the optimal solution of a macroeconomics model

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西南师范大学学报(自然科学版) 1999年第5期24卷 519-525页

作者： Xiong Dasheng 1,Du Dongyao 2.1 department of Mathematics,southwest{2. normal university,chongqing 400715 2.Financial Section,Sichuan Union university,Chengdu 610065 西南师范大学数学系重庆四川大学financial section 重庆

The optimal economic growth is always a main problem in economic control theory and it has been investigated by many scholars in their papers. A new sufficient condition of optimal control from a new angle is put forw... 详细信息

关键词： optimal economic growth optimal control sufficient condition trajectory

Different-Periodic Travelling Wave Solutions for Nonlinear Equations

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Communications in Theoretical physics 2004年第4期41卷 481-486页

作者： YE Li-Jun~1 LIN Ji~(1,2.1 department of physics,Zhejiang {2. university,Jinhua 32.004,china2.physics department,Shanghai Jiao Tong university,Shanghai 2.0030,china department of physics Zhejiang Normal University Jinhua 321004 China physics department Shanghai Jiao Tong University Shanghai 200030 China

Using Jacobi elliptic function linear superposition approach for the(1+1)-dimensional Caudrey-Dodd-Gibbon-Sawada-Kotera(CDGSK)equation and the(2.1)-dimensional Nizhnik-Novikov-Veselov(NNV)equation,many new periodic travelling wave solutions with different periods and velocities are obtained based on the knownperiodic *** procedure is crucially dependent on a sequence of cyclic identities involving Jacobi ellipticfunctions sn(ξ,m),cn(ξ,m),and dn(ξ,m).

关键词： linear superposition nonlinear equation travelling wave solution

A kind of 1form metrics in two dimensional Finsler space

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西南师范大学学报(自然科学版) 1999年第5期24卷 526-530页

作者： Yang Guojun 1,Nie\ Zhi 2.1 department of Mathematics,southwest{2. normal university,chongqing 400715 2.department of Mathematics,chongqing Teachers College,Yongchuan 402.68 西南师范大学数学系重庆重庆师范学院数学系重庆

The geodesics and T Minkowski for a kind of 1 form metrics in two dimensional Finsler space are studied,and a generalization of a propositon concerning about geodesic equations is obtained.

关键词： Finsler space 1 form metric geodosic Minkowski space T Minkowski space indicatrix OKubos method