Results 31 to 40 of about 15,282,041 (334)
Large-scale retrospective relative spectro-photometric self-calibration in space [PDF]
, 2017 We consider the application of relative self-calibration using overlap regions to spectroscopic galaxy surveys that use slit-less spectroscopy. This method is based on that developed for the SDSS by Padmanabhan at al.
Amiaux, Jerome +9 more
core +3 more sources
Can noncommutativity resolve the Big-Bang singularity? [PDF]
, 2003 A possible way to resolve the singularities of general relativity is proposed based on the assumption that the description of space-time using commuting coordinates is not valid above a certain fundamental scale.
Dimakis +12 more
core +1 more source
An Adaptive Method for Star Extraction from Digital Astronomical Images [PDF]
فصلنامه علوم و فناوری فضایی, 2010 Celestial positioning has been used for navigation purposes for many years. Stars as the extra-terrestrial benchmarks provide unique opportunity in absolute point positioning.
M. A. Sharifi +2 more
doaj
, 2003 We derive both Lagrangian and Hamiltonian mechanics as gauge theories of Newtonian mechanics. Systematic development of the distinct symmetries of dynamics and measurement suggest that gauge theory may be motivated as a reconciliation of dynamics with ...
Anderson +7 more
core +1 more source
Remote Sensing, 2016 Reconstructing building models at different levels of detail (LoDs) from airborne laser scanning point clouds is urgently needed for wide application as this method can balance between the user’s requirements and economic costs.
Bisheng Yang +5 more
semanticscholar +1 more source
Considerations and Framework for Foveated Imaging Systems †
Photonics, 2018 Foveated sight as observed in some raptor eyes is a motivation for artificial imaging systems requiring both wide fields of view as well as specific embedded regions of higher resolution.
Ram M. Narayanan +3 more
doaj +1 more source
Exploring redshift-space distortions in large-scale structure
, 2018 We explore and compare different ways large-scale structure observables in redshift-space and real space can be connected. These include direct computation in Lagrangian space, moment expansions and two formulations of the streaming model.
Vlah, Zvonimir, White, Martin
core +1 more source
Visual Saliency Based on Scale-Space Analysis in the Frequency Domain [PDF]
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2013 We address the issue of visual saliency from three perspectives. First, we consider saliency detection as a frequency domain analysis problem. Second, we achieve this by employing the concept of nonsaliency.
Jian Li +4 more
semanticscholar +1 more source
Fast Frequency Estimation by Zero Crossings of Differential Spline Wavelet Transform
EURASIP Journal on Advances in Signal Processing, 2005 Zero crossings or extrema of a wavelet transform constitute important signatures for signal analysis with the advantage of great simplicity. In this paper, we introduce a fast frequency-estimation method based on zero-crossing counting in the transform ...
Chen Jie +3 more
doaj +1 more source
Research on Fault Diagnosis of Rolling Bearing Based on Morlet Wavelet and Scale Space
机车电传动, 2021 Aiming at the difficulty of extracting the early fault features of rolling bearings, a rolling bearing fault diagnosis method based on Morlet wavelet and scale space was proposed.
Maohui WANG +3 more
doaj