搜索结果: 1-15 共查到“知识库 空间天体测量学”相关记录31条 . 查询时间(3.262 秒)
MEASURING COMPLETE GROUND-TRUTH DATA AND ERROR ESTIMATES FOR REAL VIDEO SEQUENCES, FOR PERFORMANCE EVALUATION OF TRACKING, CAMERA POSE AND MOTION ESTIMATION ALGORITHMS
Vision robotics tracking navigation registration
2015/8/14
Fundamental tasks in computer vision include determining the position, orientation and trajectory of a moving camera relative to an
observed object or scene. Many such visual tracking algorithms hav...
全球空间对地观测五十年及中国的发展
空间对地观测 地球观测系统 遥感五十年
2014/1/17
50年前第一届国际环境遥感大会“遥感”的诞生，使得人类掌握了利用对地观测技术获取地球客观而现实的时空信息、从空间高度分析并认识地球系统宏观变化规律的手段。空间对地观测技术在地球研究中具有难以比拟的优势，在遥感问世50年之际，在世界面临环境、资源、能源、灾害以及全球变化等挑战背景下，分析国际和我国对地观测技术的发展，剖析空间对地观测的科学内涵和应用方向，对更好地建设我国的空间对地观测体系，让遥感更好...
Dark goo: Bulk viscosity as an alternative to dark energy
dark energy theory cosmological perturbation theory
2011/9/29
We present a simple (microscopic) model in which bulk viscosity plays a role in explaining the present acceleration of the universe. The effect of bulk viscosity on the Friedmann equations is to turn ...
The conservative cascade of kinetic energy in compressible turbulence
hydrodynamics methods: numerical turbulence
2011/10/14
The physical nature of compressible turbulence is of fundamental importance in a variety of astrophysical settings. We present the first direct evidence that mean kinetic energy cascades conservativel...
Mass segregation and fractal substructure in young massive clusters: (I) the McLuster code and method calibration
galaxies: star clusters: individual: R136 — galaxies: star formation —methods: data analysis — Magellanic Clouds
2011/10/8
By analysing models of the young massive cluster R136 in 30 Doradus, set-up using the herewith introduced and publicly made available code McLuster, we investigate and compare different methods for de...
Detectability of GRB optical afterglows with Gaia satellite
Detectability optical Gaia satellite
2011/10/9
With the launch of Gaia satellite, detection of many different types of transient sources will be possible, one of them being optical afterglows of gamma-ray bursts (GRBs). Using the knowledge of the ...
Hidden SUSY at the LHC: the light higgsino-world scenario and the role of a lepton collider
Supersymmetry Phenomenology Supersymmetric Standard Model Large Hadron Collider
2011/10/14
While the SUSY flavor, CP and gravitino problems seem to favor a very heavy spectrum of matter scalars, fine-tuning in the electroweak sector prefers low values of superpotential mass \mu. In the limi...
Investigation of the errors in SDSS proper-motion measurements using samples of quasars
Investigation of the errors in SDSS proper-motion measurements using samples of quasars
2011/10/17
We investigate in detail the probability distribution function (pdf) of the proper-motion measurement errors in the SDSS+USNO-B proper-motion catalog of \citet{mun04} using clean quasar samples. The p...
A critical analysis of three near-infrared photometric methods of estimating distances to cataclysmic variables
Stars: novae cataclysmic variables Stars:distances parallaxes Stars:statistics
2011/10/13
A critical analysis of three methods of estimating distances to cataclysmic variables (CVs) is performed. These methods, by Ak et al., Beuermann, and Knigge, all use near-infrared (JHK or Ks) magnitud...
Observations of the December 13 and 14, 2006, Solar Particle Events in the 80 MeV/n - 3 GeV/n range from space with PAMELA detector
Observations Solar Particle Events detector
2011/10/13
We present the space spectrometer PAMELA observations of proton and helium fluxes during the December 13 and 14, 2006 solar particle events. This is the first direct measurement of the solar energetic...
Redshift and distances in a ΛCDM cosmology with non-linear inhomogeneities
cosmology: theory, relativity, large-scale structure of Universe, super- novae: general
2011/10/13
In this paper we study the effects of inhomogeneities on light propagation in a flat {\Lambda}CDM background. To this end we use exact solutions of Einstein's equations (Meures & Bruni 2011) where, st...
Magnetic Fields at First Order Phase Transition: A Threat to Electroweak Baryogenesis
Magnetic Fields First Order Phase Transition:Electroweak Baryogenesis
2011/10/17
The generation of the observed baryon asymmetry may have taken place during the electroweak phase transition, thus involving physics testable at LHC, a scenario dubbed electroweak baryogenesis. In thi...
Gamma Ray Bursts in the comoving frame
Gamma-ray: bursts— Radiation mechanisms: non thermal
2011/10/12
We estimate the bulk Lorentz factor Gamma_0 of 32 GRBs using the measured peak time of their afterglow light curves. We consider two possible scenarios for the estimate of Gamma_0: the case of a homog...
Searching for dark matter isocurvature initial conditions with N-body Simulations
Searching dark matter isocurvature initial conditions N-body Simulations
2011/10/12
Small fraction of isocurvature perturbations may exist and correlate with adiabatic perturbations in the primordial perturbations. Naively switching off isocurvature perturbations may lead to biased r...
The RMS Survey: Ammonia and water maser analysis of massive star forming regions
Stars: formation – Stars: early-type – ISM: molecules – ISM: radio lines
2011/10/12
The Red MSX Source (RMS) survey has identified a sample of ~1200 massive young stellar objects (MYSOs), compact and ultra compact HII regions from a sample of ~2000 MSX and 2MASS colour selected sourc...