搜索结果: 16-30 共查到“理学 precision”相关记录60条 . 查询时间(0.178 秒)
Sub-femtosecond absolute timing precision with a 10 GHz hybrid photonic-microwave oscillator
Sub-femtosecond absolute timing precision optics
2012/5/29
We present an optical-electronic approach to generating microwave signals with high spectral purity. By circumventing shot noise and operating near fundamental thermal limits, we demonstrate 10 GHz si...
Precision simulation of ground-based lensing data using observations from space
methods: data analysis – techniques: image processing – gravitational lensing: weak – galaxies: structure
2011/10/13
Current and upcoming wide-field, ground-based, broad-band imaging surveys promise to address a wide range of outstanding problems in galaxy formation and cosmology. Several such uses of ground-based d...
Accurate relative spectrophotometry is critical for many science applications. Small wavelength scale residuals in the flux calibration can significantly impact the measurements of weak emission and a...
High precision astrometry mission for the detection and characterization of nearby habitable planetary systems with the Nearby Earth Astrometric Telescope (NEAT)
Exoplanets Planetary systems Planetary formation Astrometry Space Mission
2011/10/11
A complete census of planetary systems around a volume-limited sample of solar-type stars (FGK dwarfs) in the Solar neighborhood with uniform sensitivity down to Earth-mass planets within their Habita...
Deriving the radial-velocity variations induced by stellar activity from high-precision photometry - Test on HD189733 with simultaneous MOST/SOPHIE data
late-type – stars: activity – stars: rotation – techniques: radial velocity – planetary systems – stars: individual
2011/10/19
Stellar activity induces apparent radial velocity (RV) variations in late-type main-sequence stars that may hamper the detection of low-mass planets and the measurement of their mass. We use simultane...
Blending Bayesian and frequentist methods according to the precision of prior information with an application to hypothesis testing
blended inference confidence distribution confidence posterior hybrid inference maximum entropy
2011/9/30
Abstract: The following zero-sum game between nature and a statistician blends Bayesian methods with frequentist methods such as p-values and confidence intervals. Nature chooses a posterior distribut...
Assessing the Role of Spin Noise in the Precision Timing of Millisecond Pulsars
the Role of Spin Noise the Precision Timing
2011/1/10
We investigate rotational spin noise (referred to as timing noise) in non-accreting pulsars: millisecond pulsars, canonical pulsars, and magnetars. Particular attention is placed on quantifying the st...
Very High Precision Determination of Low-Energy Parameters: The 2-d Heisenberg Quantum Antiferromagnet as a Test Case
Precision Determination Low-Energy Parameters
2011/1/7
The 2-d spin 1/2 Heisenberg antiferromagnet with exchange coupling $J$ is investigated on a periodic square lattice of spacing $a$ at very small temperatures using the loop-cluster algorithm. Monte Ca...
Effective Field Theory and High-Precision Calculations of Nuclear Electroweak Processes
Effective Field Theory High-Precision Calculations Nuclear Electroweak Processes
2010/12/29
High-precision calculations of electroweak processes in light nuclei are of great importance for multiple reasons. Gerry Brown together with Dan-Olof Riska published in 1972 a famous calculation on ra...
A Precision Test for an Extra Spatial Dimension Using Black Hole--Pulsar Binaries
Extra Spatial Dimension Black Hole Pulsar Binaries
2011/1/11
We discuss the observable effects of enhanced black-hole mass loss in a black hole--neutron star (BH--NS) binary, due to the presence of a warped extra spatial dimension of curvature radius $L$ in the...
Very High Precision Determination of Low-Energy Parameters: The 2-d Heisenberg Quantum Antiferromagnet as a Test Case
Very High Precision Determination of Low-Energy Paraameters 2-d Heisenberg Quantum Antiferromagnet Test Case
2011/1/14
The 2-d spin 1 2 Heisenberg antiferromagnet with exchange coupling J is investigated on a periodic square lattice of spacing a at very small temperatures using the loop-cluster algorithm. Monte Carlo ...
Precision Measurement of CP Violation in D0->pi+pi- at CDF
Precision Measurement CP Violation D0->pi+pi- at CDF
2011/1/4
We report a preliminary measurement of the CP violating asymmetry in D0 →p+p− using approximately 215·000 decays reconstructed in about 5.94 fb−1 of CDF data.
Precision Measurement of KS Meson Lifetime with the KLOE detector
Precision Measurement KS Meson Lifetime KLOE detector
2011/1/4
Using a large sample of pure, slow, short lived K0 mesons collected with KLOE detector at
DANE, we have measured the KS lifetime. From a fit to the proper time distribution we find τ (KS) = (89.562 ...
Towards Precision LSST Weak-Lensing Measurement - I: Impacts of Atmospheric Turbulence and Optical Aberration
Astronomical Instrumentation gravitational lensing dark matter cosmology
2010/11/12
The weak-lensing science of the Large Synoptic Survey Telescope (LSST)project drives the need to carefully model and separate the instrumental arti-facts from the intrinsic shear signal caused by grav...
Effective Field Theory and High-Precision Calculations of Nuclear Electroweak Processes
Effective Field Theory High-Precision Calculations of Nuclear Electroweak Processes
2011/1/7
High-precision calculations of electroweak processes in light nuclei are of great importance
for multiple reasons. Gerry Brown together with Dan-Olof Riska published in 1972 a famous calculation on r...