منابع مشابه
Discontinuities in ecological data.
H istorically, ecology has focused on continuous distributions and smooth transitions. Only recently have discontinuities and thresholds become an explicit focus in some areas of ecology, especially in the realm of complex systems. The study of animal body mass distributions has been recognized for its potential to provide insight into the underlying processes shaping animal communities. Hutchi...
متن کاملFinding Discontinuities from Tomographic Data*
A method for derivation of inversion formulas for the Radon transform of f (x) is given. This method allows one to construct functions ψ(x) which are easy to compute and which have the same wave fronts as f (x). This, in turn, allows one to calculate the singular support S of f (x) by computing ψ(x) given tomographic data. A simple geometrical relation between the singular supports of f andˆf ,...
متن کاملReconstruction of discontinuities from backscattering data in 2 D ∗
We prove that the non smooth part of a non compactly supported potential q in the Schrödinger Hamiltonian −∆ + q, in dimension n = 2, is contained in its Born approximation qB for backscattering data in a precise sense in terms of continuity: Given q in W the difference q−qB is in the Hölder class Λ for any β < α.
متن کاملDealing with unknown discontinuities in data and models
The Earth is characterised by variability on many scales, and the significance of these scales depends on the particular problem under consideration. Natural spatial discontinuities, such as faults and lithological boundaries, separate regions within which the physical properties, processes or geological evolution may be similar. Similarly, time series may show very rapid changes (effectively d...
متن کاملDetecting Strength and Location of Jump Discontinuities in Numerical Data
In [1] and some following publications, Tadmor and Gelb took up a well known property of conjugate Fourier series in 1-d, namely the property to detect jump discontinuities in given spectral data. In fact, this property of conjugate series is known for quite a long time. The research in papers around the year 1910 shows that there were also other means of detecting jumps observed and analysed. ...
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: Proceedings of the National Academy of Sciences
سال: 2006
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.0601668103