作者机构：
[F.Hu; X.Cai] Institute of Particle Physics, Hua-Zhong Normal University
会议名称：
CCAST"复杂性问题"研讨会
会议时间：
2001-01-01
会议地点：
中国北京
会议论文集名称：
Complexity Problems-Proceedings of CCAST (World Laboratory) Workshop
摘要：
<正> According to "swinging cross-bridge model", muscle contraction is produced by cyclical attachment and detachment of cross-Bridges towards thin filament. In this paper, we investigate the cooperative behaviors of cross-bridges in muscle isotonic contraction in one dimensional condition. Firstly we suppose a relationship between energy and time for a single cross-bridge during the working cycle. Then we investigate two particular cooperative behaviors of cross-bridges in muscle isotonic contraction（in which the extern load F is constant）: （1） no attached cross-bridges work at the same tempo, the working process is not affected by the environment; （2）no attached croes-bridges work at the same tempo, and the working rate is proportional to the very velocity of thin filament in the contraction. We have calculated the relationship between the extern load to muscle and the velocity of muscle contraction in the two conditions. We find that in the first case it is like the Hill curve, and in the second case the velocity is inversely proportional to the force.
作者机构：
[Liu, XC] Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.;Huazhong Normal Univ, Inst Astrophys, Wuhan 430079, Peoples R China.;Hainan Normal Coll, Dept Phys, Haikou 571158, Peoples R China.;Xiangfan Normal Coll, Dept Phys, Xiangfan 441053, Peoples R China.
通讯机构：
[Liu, XC] H;Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
摘要：
We extend the research by Lubow and Pringle of axisymmetric waves in accretion disks to the case where self-gravity of disks should be considered. We derive and analyse the dispersion relations with the effect of self-gravity. Results show that self-gravity extends the forbidden region of the wave propagation: for high frequency p-modes, self-gravity makes the wavelength shorter and the group velocity larger; for low frequency g-modes, the effect is opposite.
期刊：
IEEE JOURNAL OF QUANTUM ELECTRONICS,2001年37(9):1161-1170 ISSN：0018-9197
通讯作者：
Hooijer, C
作者机构：
[Hooijer, C] Stichting Fundamenteel Onderzoek Mat FOM, Utrecht, Netherlands.;Huazhong Normal Univ, Dept Phys, Wuhan 430070, Peoples R China.;Vrije Univ Amsterdam, Div Phys & Astron, NL-1081 HV Amsterdam, Netherlands.
通讯机构：
[Hooijer, C] S;Stichting Fundamenteel Onderzoek Mat FOM, Utrecht, Netherlands.
关键词：
Green's function methods;laser modes;laser theory;optical multilayers;quantum optics;quantum well lasers;semiconductor quantum wells;spontaneous emission;Green tensor;beta factor;charge carriers;competition;coupled Heisenberg equations of motion;dielectr
摘要：
A theoretical analysis of spontaneous emission from a quantum well in dielectric multilayer structures, especially the influence of dielectric geometry on the relative intensities of guided and radiation modes and on polarization, is presented. We first discuss a relatively simple three-layer case, and subsequently a technologically more interesting five-layer structure that has been proposed for a high-power laser. The expression for the partial, as well as total, emission rates is derived within a broader framework of coupled Heisenberg equations of motion for charge carriers and the quantized electromagnetic field. Thereby, explicit mode decomposition of the Green tensor is avoided. Still, the beta factor for individual guided modes, which is a relevant quantity for the lasing threshold of a device, can be identified and a competition between modes is shown to exist in specific cases.
作者机构：
[Yang, CB; Zhou, DM; Cai, X; Wang, XR] Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Zhou, DM] H;Huazhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
摘要：
The Monte Carlo generator (LUCIAE) is used to investigate the fluctuations of K/π ratios at super proton synchrotron energies. The distribution of K/π ratios seems to be Gaussian from the simulation and the distribution width, and the relative variances are larger than those from the Poissonian-type pure-statistical fluctuations. This discrepancy might be attributed to the dynamical fluctuations involved in the LUCIAE model.
作者机构：
[Yang, CB; Cai, X] Hua Zhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Yang, CB] H;Hua Zhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
关键词：
05.40.-a Fluctuation phenomena, random processes, noise, and Brownian motion;64.60.Ak Renormalization-group, fractal, and percolation studies of phase transitions;87.10.+e General theory and mathematical aspects
摘要：
A new type of spatio-temporal correlation function for the process approaching the self-organized criticality is investigated within the Bak-Sneppen model for biological evolution. In terms of the "directional shorter distance" between the two sites with minimum fitness at two successive updates, the correlation function is defined and studied numerically for the nearest- and random-neighbor versions of the model. Qualitatively different behaviors of the jump of the minimal site in the two models are presented, and the behaviors of the correlation functions are shown also different.
期刊：
Journal of Molecular Spectroscopy,2001年205(1):16-19 ISSN：0022-2852
通讯作者：
Liu, YY
作者机构：
[Liu, YY] E China Normal Univ, Dept Phys, Shanghai 200062, Peoples R China.;Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China.;Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.;Wuhan Univ, Dept Phys, Wuhan 430071, Peoples R China.
通讯机构：
[Liu, YY] E;E China Normal Univ, Dept Phys, Shanghai 200062, Peoples R China.
摘要：
The rotational structure of (2,0) vibrational band of A<sup>2</sup>Π<inf>i</inf>-X<sup>2</sup>Σ<sup>+</sup> transition of CN has been studied by concentration-modulation laser spectroscopy using a Ti:sapphire laser. The CN radical was produced in the ac glow discharge of acetonitrile with helium as the carrier gas. All 12 branches including four new branches have been observed and measured with an absolute accuracy of 0.007 cm<sup>-1</sup> in the region 12 450-12 750 cm<sup>-1</sup>. Analysis of the spectra has led to improved molecular parameters of the A<sup>2</sup>Π<inf>i</inf> (v′= 2) state.
摘要：
In the paper we give some results about nuclear shadowing of real photon at LHC. We show that shadowing grows strong with the increasing of photon energy Eγ. The CMS energy dependence of total cross sections of production of ρ, ω and φ in the process γ + A→V + A is also given. The results show that there is a critical energy point, above which the nuclear shadowing is strong enough to be observed.
期刊：
EUROPEAN PHYSICAL JOURNAL PLUS,2000年115(2):143-150 ISSN：2190-5444
通讯作者：
Wu, SQ
作者机构：
[Cai, X; Wu, SQ] Hua Zhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Wu, SQ] H;Hua Zhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
摘要：
Four classical laws of black hole thermodynamics are extended from exterior (event) horizon to interior (Cauchy) horizon. Especially, the first law of classical thermodynamics for Kerr-Newman black hole (KNBH) is generalized to those in quantum form. Then five quantum conservation laws on the KNBH evaporation effect are derived in virtue of thermodynamical equilibrium conditions. As a by-product, Bekenstein-Hawking's relation $ S=A/4 $ is exactly recovered.
