作者机构：
[Zhang, ZJ] Univ Sci & Technol China, Dept Modern Phys, Hefei 230027, Peoples R China.;Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China.;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, ZJ] U;Univ Sci & Technol China, Dept Modern Phys, Hefei 230027, Peoples R China.
摘要：
Formulae of proton and neutron boson structure functions (DSF's) are deduced in terms of a microscopic approach of sdgIBM (namely, microscopic sdgIBM). For the nucleus 190Os, the value of BSF's is worked out. Due to the high similarity, the maximum F-spin truncation is made under the full-symmetry approximation. Thereafter, calculations of E2 and E4 transition charge densities (TCD's) are performed in the sdgIBM-1. It is found that the E2 and E4 TCD's can be reproduced quite satisfactorily in the uniform frame of microscopic sdgIBM-1.
摘要：
By analyzing the fifth-order dispersion relation, the influence of coupled magnetic field and self-gravity on the pulsational instability of gas pressure dominated accretion disk is investigated. Our main results are that the viscous modes become more stable with the increase of self-gravity, magnetized field and viscosity, while they enhance the instabilities of acoustic modes. The effect of self-gravity to the instability is much greater than that of magnetic field in transition zone of the accretion disk. Especially, the self-gravity affects the thermal-modes and acoustic modes strongly. Finally, we discuss our results.
作者机构：
[Zhang, GP; Zhang, XH; Ye, JX; Li, ST] Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, GP] C;Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
关键词：
Mirrors;Laser resonators;Micro optics;Diffraction;Binary data;Laser applications;Near field diffraction;Quantization;Spherical lenses;Laser processing
摘要：
A novel method for mode regulation of a laser resonator is presented in this paper. The traditional spherical mirrors of the laser resonator are substituted by the micro-optic mirrors, which are produced by the binary optical technology. The phase distributions of the micro-optic mirrors may be designed carefully so that the output mode of the laser resonator is regulated as an arbitrary desired field distribution. Several mode fields, such as a fundamental-mode Gaussian distribution and a circular or rectangular uniform. intensity distribution, are analyzed in our discussion.
期刊：
Proceedings of SPIE - The International Society for Optical Engineering,1999年3607:146-157 ISSN：0277-786X
通讯作者：
Li, ZY
作者机构：
[Li, XF; Liu, W; Li, ZY] Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Li, ZY] H;Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
会议名称：
Scanning and Force Microscopies for Biomedical Applications
会议时间：
San Jose, CA, United States
会议论文集名称：
Scanning and Force Microscopies for Biomedical Applications
关键词：
SNOM;image restoration;over restoration
摘要：
Recently we have derived the angular spectrum transfer function (ASTF) for photon scanning tunneling microscope and collection mode scanning near field optical microscope (collection-SNOM) under dark illumination (Proc. SPIE, Vol. 3467, 23 to approximately 33). The present paper discussed image restoration using the ASTF. It was found that the key to achieve better restoration is to find a ASTF as close to that of the system as possible, which then depends on the determination of tip size, tip sample distance, incident angle of illuminating laser beam, etc. When low values are used for tip diameter and tip sample distance improvement of image quality is obvious after restoration. But when the value adopted for tip sample distance is 0.05 λhigher than real one, high frequency oscillation in the restored image become intolerable, which we call over restoration. Slight over restoration was also observed when the value employed for tip diameter is 0.02 λlarger than real one. The appearance of over restoration on the other hand can be utilized for the estimation of tip diameter and tip sample distance of the system. Generally the image seems more sensitive to tip sample distance than to tip size.
作者机构：
[Hu, Y; Liu, LS; Yu, ML] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Hu, Y] H;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
关键词：
多分形谱;高能粒子碰撞;Levy稳定性
摘要：
A method for extracting the Levy stability index μ from the multi-fractal spectrum f(α) in high energy multiparticle production is proposed. This index is an important parameter, characterizing the non-linear behaviour of dynamical fluctuations in high energy collisions. Using the random cascading α model as an example, the validity of this method is tested. It is shown that this method, based on a linear fit, is consistent with and more accurate than the usual method, which gets the Levy index through fitting the ratio of qth to 2nd order multi-fractal (Rényi) dimensions to the Peschanski formula.
作者机构：
[Zhang Guoping; Huang Zhuming] Department of Physics,Central China Normal University;[Zhang Guoping; Huang Zhuming] Dept.of Basic Courses,Wuhan Institute of Chemical Technology
会议名称：
1999 International Conference on Computational Electromagnetics and Its Applications(ICCEA’99)
会议时间：
1999-11-01
会议地点：
中国北京
摘要：
<正>On the basis of the coupled-mode method, transmission properties of the tapered fiber probes which are used for the scanning near-field optical microscope (SNOM) are presented in this paper.The for
