Results 11 to 20 of about 19,001,244 (290)
A photon transport problem with a time-dependent point source [PDF]
, 2009 We consider a time-dependent problem of photon transport in an interstellar cloud with a point photon source modeled by a Dirac δ functional. The existence of a unique distributional solution to this problem is established by using the theory of ...
McBride, A.C. +2 more
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Initial On-Orbit Modulation Transfer Function Performance Analysis for Geostationary Ocean Color Imager [PDF]
Journal of Astronomy and Space Sciences, 2012 The world’s first geostationary ocean color imager (GOCI) is a three-mirror anastigmat optical system 140 mm in diameter. Designed for 500 m ground sampling distance, this paper deals with on-orbit modulation transfer function (MTF)measurement and ...
Eunsong Oh +4 more
doaj +1 more source
A Practical Method for Estimation of Point Light-Sources [PDF]
Procedings of the British Machine Vision Conference 2001, 2001 We introduce a general model for point light-sources and show how the parameters of a source at finite distance can be estimated by shading on an object with known geometry and Lambertian reflectance. The parameters we estimate include not only the direction but also the location of the source.
Martin Weber 0001, Roberto Cipolla
openaire +2 more sources
Reproductive Health, 2023 Background Many factors influence young women’s choice of contraceptive methods and where to source them, yet less is known about whether one of these choices (method or source) is prioritized and the relationship between these choices.
Lisa M. Calhoun +9 more
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A Point Crack Source Location Method without Velocity Information in Anisotropic Plates
Applied Sciences, 2022 Locating cracks in a solid object using acoustic emission (AE) is useful both for detecting defects during safety monitoring and for basic laboratory studies of fractures.
Dong Geon Lim +3 more
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Proximal methods for point source localisation
Journal of Nonsmooth Analysis and Optimization, 2023 Point source localisation is generally modelled as a Lasso-type problem on measures. However, optimisation methods in non-Hilbert spaces, such as the space of Radon measures, are much less developed than in Hilbert spaces. Most numerical algorithms for point source localisation are based on the Frank-Wolfe conditional gradient method, for which ad hoc ...
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Advance detection technology of three-point source DC method based on COMSOL
Meikuang Anquan, 2023 When the traditional single point power supply electrode DC advance detection technology is used to detect the long-distance anomaly, the signal gradually weakens and the accuracy greatly decreases with the increase of detection distance.
GAO Weifu, WANG Kewei, HU Anshun, WANG Naijun
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Solving eigenvalues problems for Helmholtz equation by point-source method
Advanced Engineering Research, 2016 A method of problem solution of the eigenvalues and eigenfunctions for the Helmholtz equation in the domains with arbitrary configuration is worked out.
Elena E. Shcherbakova
doaj +1 more source
Advanced Engineering Research, 2017 Introduction. The work objective is to develop a new universal numerical method for solving boundary value problems for linear elliptic equations. Materials and Methods .
Sergey Yu. Knyazev +1 more
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Application of the numerically obtained fundamental solutions in the field point-source method
Advanced Engineering Research, 2016 The work objective is to obtain an integral equation by which, using the known fundamental solution to the other equation, it is possible to find a fundamental solution to the linear elliptic equation. The concept of a numerical fundamental solution (NFS)
Sergey Yu. Knyazev +1 more
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