褶皱岩层初始挠曲的分叉特性     

杨成永  陈至达  杨锡禄 《大地测量与地球动力学》1995,(3)

基于拖带坐标法建立了岩层大变形的一维非线性微分方程，然后用解析与数值方法研究了变刚度、可伸缩岩层在侧向压力及自重作用下的分叉特性，初步揭示了褶皱岩层初始挠曲的形成机理。  相似文献   

The 2dF QSO Redshift Survey – VI. Measuring Λ and β from redshift-space distortions in the power spectrum     

P.J. Outram  Fiona Hoyle  T. Shanks  B.J. Boyle  S.M. Croom  N.S. Loaring  L. Miller  R.J. Smith 《Monthly notices of the Royal Astronomical Society》2001,328(1):174-184

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优化发电能源结构的初探   总被引：1，自引：0，他引：1  

程地卫 《成都信息工程学院学报》2001,16(1):41-45

从我国电力工业发展的角度，浅析了国内外发电能源结构及其变化趋势，作者认为优化我国发电能源结构、采取必要的技术措施，是实现我国电力 工业可持续发的重要途径。  相似文献   

山东龙口市大磨曲家金矿地质特征及找矿方向探讨          下载免费PDF全文

刘晓煌  耿书杰  马树江  高池兴  赵新峰 《山东国土资源》2001,17(3):69-75

大磨曲家金矿位于玲珑金矿田东风矿床主脉的NE延伸部位.矿区内已发现矿脉25条.通过对玲珑金矿田的成矿条件分析和东风矿床的综合研究,认为本区有很好的找矿前景.  相似文献   

The scaling of the redshift power spectrum: observations from the Las Campanas redshift survey     

Y.P. Jing  G. Börner 《Monthly notices of the Royal Astronomical Society》2001,325(4):1389-1396

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Conditional cumulants in a weakly non-linear regime     

Jun Pan †  István Szapudi 《Monthly notices of the Royal Astronomical Society》2005,361(1):357-361

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Weak lensing with COMBO-17: estimation and removal of intrinsic alignments     

Catherine Heymans  Michael Brown  Alan Heavens  Klaus Meisenheimer  y Taylor  Christian Wolf 《Monthly notices of the Royal Astronomical Society》2004,347(3):895-908

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The Optical Gravitational Lensing Experiment: catalogue of stellar proper motions in the OGLE-II Galactic bulge fields     

T. Sumi  X. Wu  A. Udalski  M. Szyma&#;ski  M. Kubiak  G. Pietrzy&#;ski  I. Soszy&#;ski  P. Wo&#;niak  K. &#;ebru&#;  O. Szewczyk  &#;. Wyrzykowski 《Monthly notices of the Royal Astronomical Society》2004,348(4):1439-1450

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On the relation between orbital structure and observed bar morphology     

P. A. Patsis 《Monthly notices of the Royal Astronomical Society》2005,358(2):305-315

We investigate the morphological relation between the orbits of the central family of periodic orbits ( x ₁ family) and the bar itself using models of test particles moving in a barred potential. We show that different bar morphologies may have as a backbone the same set of x ₁ periodic orbits. We point out that by populating initially axisymmetric stellar discs exponentially with test particles in circular, or almost circular motion, we may end up with a response bar which reveals a shape different in crucial details from that of the individual stable x ₁ orbits. For example, a bar model in which the x ₁ orbits are pure ellipses may have a much more complicated response morphology. This depends on the particular invariant curves around x ₁, which are populated in each model.  相似文献   

Simulations of deep pencil-beam redshift surveys     

N. Yoshida  J. Colberg  S.D.M. White  A.E. Evrard  T.J. MacFarland †  H.M.P. Couchman  A. Jenkins  C.S. Frenk  F.R. Pearce  G. Efstathiou  J.A. Peacock  P.A. Thomas 《Monthly notices of the Royal Astronomical Society》2001,325(2):803-816

We create mock pencil-beam redshift surveys from very large cosmological N -body simulations of two cold dark matter (CDM) cosmogonies, an Einstein–de Sitter model ( τ CDM) and a flat model with Ω₀=0.3 and a cosmological constant (ΛCDM). We use these to assess the significance of the apparent periodicity discovered by Broadhurst et al. Simulation particles are tagged as 'galaxies' so as to reproduce observed present-day correlations. They are then identified along the past light-cones of hypothetical observers to create mock catalogues with the geometry and the distance distribution of the Broadhurst et al. data. We produce 1936 (2625) quasi-independent catalogues from our τ CDM (ΛCDM) simulation. A couple of large clumps in a catalogue can produce a high peak at low wavenumbers in the corresponding one-dimensional power spectrum, without any apparent large-scale periodicity in the original redshift histogram. Although the simulated redshift histograms frequently display regularly spaced clumps, the spacing of these clumps varies between catalogues and there is no 'preferred' period over our many realizations. We find only a 0.72 (0.49) per cent chance that the highest peak in the power spectrum of a τ CDM (ΛCDM) catalogue has a peak-to-noise ratio higher than that in the Broadhurst et al. data. None of the simulated catalogues with such high peaks shows coherently spaced clumps with a significance as high as that of the real data. We conclude that in CDM universes, the regularity on a scale of ∼130  h ⁻¹ Mpc observed by Broadhurst et al. has a priori probability well below 10⁻³.  相似文献