DETECTING POINT-LIKE SOURCES OF UNKNOWN FREQUENCY SPECTRA
نویسندگان
چکیده
منابع مشابه
Discovering Point Sources in Unknown Environments
We consider the inverse problem of discovering the location of a source from very sparse point measurements in a bounded domain that contains impenetrable (and possibly unknown) obstacles. We present an adaptive algorithm for determining the measurement locations, and ultimately, the source locations. Specifically, we investigate source discovery for the Laplace operator, though the approach ca...
متن کاملLimited Frequency Range Observations of Cosmological Point Sources
This paper discusses observational relations for cosmological point sources in some specific waveband, and their use in the context of the data provided by the galaxy redshift surveys. By starting from the general theory for observations in relativistic cosmology, developed mainly by G. F. R. Ellis, the equations for colour, K-correction and number counts of cosmological point sources are discu...
متن کاملMathematical model of erythrocytes as point-like sources.
A new approach to investigate the effect of pericapillary gradients, caused by the particulate nature of blood, on oxygen partial pressure (pO2) in tissue is presented. The blood erythrocytes are modeled as point-like sources, which makes the system independent of the geometry of the erythrocytes. This model is semi-analytical and is developed to estimate the pO2 far from the erythrocytes. It d...
متن کاملLight Sources with Unknown
This paper reconsiders the familiar case of photometric stereo under the assumption of Lambertian surface reeectance and three distant point sources of illumination. Here, it is assumed that the directions to and the relative strengths of the three light sources are not known a priori. Rather, estimation of these parameters becomes part of the problem formulation. Each light source is represent...
متن کاملVariational approximation for detecting point-like target problems
The aim of this paper is to provide a rigorous variational formulation for the detection of points in 2-d biological images. To this purpose we introduce a new functional whose minimizers give the points we want to detect. Then we define an approximating sequence of functionals for which we prove the Γ-convergence to the initial one. AMS 2000 subject Classification: 49J45 49Q20
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Progress In Electromagnetics Research B
سال: 2013
ISSN: 1937-6472
DOI: 10.2528/pierb13030414