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浏览/检索结果: 共13条，第1-10条 帮助 限定条件 学科主题：Physics    专题：紫金山天文台    第一署名单位    第一作者单位    通讯作者单位    发表日期：2008     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择发表日期升序发表日期降序提交时间升序提交时间降序题名升序题名降序作者升序作者降序 Automatic Estimation of Peak Regions in Gamma-Ray Spectra Measured by NaI Detector 期刊论文 CHINESE PHYSICS LETTERS, 2008, 卷号: 25, 期号: 11, 页码: 3942-3945 作者:  Zhu Meng-Hua;  Liu Liang-Gang;  Xu Ao-Ao;  Ma Tao 收藏  |  浏览/下载：21/0  |  提交时间：2011/12/30 BACKGROUND ELIMINATION  GERMANIUM SPECTRA  ALGORITHMS   High-energy gamma-ray emission from gamma-ray bursts - before GLAST 期刊论文 FRONTIERS OF PHYSICS IN CHINA, 2008, 卷号: 3, 期号: 3, 页码: 306-330 作者:  Fan, Yi-Zhong;  Piran, Tsvi 收藏  |  浏览/下载：16/0  |  提交时间：2011/12/30 gamma-ray bursts (GRBs)  afterglows  shock waves  relativity  radiation mechanisms: nonthermal   Solitary kinetic Alfven waves in dusty plasmas 期刊论文 PHYSICS OF PLASMAS, 2008, 卷号: 15, 期号: 8, 页码: 083703 作者:  Li, Yang-fang;  Wu, D. J.;  Morfill, G. E. 收藏  |  浏览/下载：22/0  |  提交时间：2011/12/29 Solitary kinetic Alfven waves in dusty plasmas are studied by Considering the dust charge variation. The effect of the dust charge-to-mass ratio on the soliton solution is discussed. The Sagdeev potential is derived analytically with constant dust charge and then calculated numerically by taking the dust charge variation into account. We show that the dust charge-to-mass ratio plays an important role in the soliton properties. The soliton solutions are comprised of two branches. One branch is sub-Alfvenic and the soliton velocity is obviously smaller than the Alfven speed. The other branch is super-Alfvenic and the soliton velocity is very close to or greater than the Alfven speed. Both compressive and rarefactive solitons can exist. For the sub-Alfvenic branch  the rarefactive soliton is bell-shaped and it is much narrower than the compressive one. However  for the super-Alfvenic branch  the compressive soliton is bell-shaped and narrower  and the rarefactive one is broadened. When the charge-to-mass ratio of the dust grains is sufficiently high  the width of the rarefactive soliton  in the super-Alfvenic branch  will broaden extremely and a electron depletion will be observed. It is also shown that the bell-shaped soliton can transition to a cusped structure when the velocity is sufficiently high. (C) 2008 American Institute of Physics.   Upper atmospheric rotation rate from orbit analysis 期刊论文 SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY, 2008, 卷号: 51, 期号: 8, 页码: 1164-1169 作者:  Ma JingYuan;  Zhang Jing;  Cheng MinKang 收藏  |  浏览/下载：10/0  |  提交时间：2011/12/30 upper atmosphere  inclination  orbit decay   Low-noise 0.5 THz all-NbN superconductor-insulator-superconductor mixer for submillimeter wave astronomy 期刊论文 APPLIED PHYSICS LETTERS, 2008, 卷号: 92, 期号: 22, 页码: 222504 作者:  Li, Jing;  Takeda, Masanori;  Wang, Zhen;  Shi, Sheng-Cai;  Yang, Ji 收藏  |  浏览/下载：38/0  |  提交时间：2011/12/29 JOSEPHSON TUNNEL-JUNCTIONS  SIS MIXERS  TUNING CIRCUIT  MILLIMETER   Determining the dust extinction of gamma-ray burst host galaxies: A direct method based on optical and X-ray photometry 期刊论文 ASTROPHYSICAL JOURNAL, 2008, 卷号: 678, 期号: 2, 页码: 1136-1141 作者:  Li, Y.;  Li, Aigen;  Wei, D. M. 收藏  |  浏览/下载：10/0  |  提交时间：2011/12/30 dust, extinction  gamma rays : bursts   Analysis of origin of multi-ring basins by theory of deep water waves 期刊论文 CHINESE PHYSICS LETTERS, 2008, 卷号: 25, 期号: 2, 页码: 787-789 作者:  Shi Jian-Chun;  Ma Yue-Hua;  Chen Dao-Han;  Bao Gang 收藏  |  浏览/下载：14/0  |  提交时间：2011/12/29 ASTEROID IMPACT TSUNAMI  MODEL  MOON   Electron acceleration by small-amplitude solitary kinetic Alfven wave in a low-beta plasma 期刊论文 CHINESE PHYSICS LETTERS, 2008, 卷号: 25, 期号: 2, 页码: 794-797 作者:  Wang De-Yu;  Song Qi-Wu;  Yang Lei 收藏  |  浏览/下载：29/0  |  提交时间：2011/12/29 AURORA   Rescaled bispectrum and the baryonic wiggles in bispectrum 期刊论文 RELATIVISTIC ASTROPHYSICS (AIP CONFERENCE PROCEEDINGS) , 2008, 卷号: 966, 页码: 107-113 Pan Jun 收藏  |  浏览/下载：83/0  |  提交时间：2011/12/30 LARGE-SCALE STRUCTURE  PROBING DARK ENERGY  POWER-SPECTRUM  NONLINEAR EVOLUTION  PERTURBATION-THEORY  REDSHIFT SURVEYS  HALO-MODEL  FLUCTUATIONS  SIMULATIONS  GALAXIES   The DWT power spectrum of the two-degree field galaxy redshift survey 期刊论文 RELATIVISTIC ASTROPHYSICS (AIP CONFERENCE PROCEEDINGS) , 2008, 卷号: 966, 页码: 87-94 Cai Yan-Chuan; Pan Jun; Zhao Yong-Heng 收藏  |  浏览/下载：10/0  |  提交时间：2011/12/30 MULTIRESOLUTION DECOMPOSITION  LUMINOSITY DEPENDENCE  OSCILLATIONS  DENSITY  REAL