Results 31 to 40 of about 30,204 (264)

Retrieval of Boreal Forest Heights Using an Improved Random Volume over Ground (RVoG) Model Based on Repeat-Pass Spaceborne Polarimetric SAR Interferometry: The Case Study of Saihanba, China

open access: yesRemote Sensing, 2021
Spaceborne polarimetric synthetic aperture radar interferometry (PolInSAR) has the potential to deal with large-scale forest height inversion. However, the inversion is influenced by strong temporal decorrelation interference resulting from a large ...
Yu Mao   +6 more
doaj   +1 more source

Representing derivatives of Chebyshev polynomials by Chebyshev polynomials and related questions

open access: yesOpen Mathematics, 2017
A recursion formula for derivatives of Chebyshev polynomials is replaced by an explicit formula. Similar formulae are derived for scaled Fibonacci numbers.
Prodinger Helmut
doaj   +1 more source

How reliable are process-based 222radon emission maps? Results from an atmospheric 222radon inversion in Europe [PDF]

open access: yesAtmospheric Chemistry and Physics
The radioactive noble gas radon (222Rn) is a suitable tracer for atmospheric transport and mixing processes that can be used to evaluate and calibrate atmospheric transport models or to estimate greenhouse gas (GHG) emissions using the so-called radon ...
F. Maier   +9 more
doaj   +1 more source

Nonparametric Multivariate Density Estimation: Case Study of Cauchy Mixture Model

open access: yesMathematics, 2021
Estimation of probability density functions (pdf) is considered an essential part of statistical modelling. Heteroskedasticity and outliers are the problems that make data analysis harder. The Cauchy mixture model helps us to cover both of them.
Tomas Ruzgas   +2 more
doaj   +1 more source

On an inversion formula [PDF]

open access: yesGlasgow Mathematical Journal, 1980
In this paper the author considers the problem of finding a formula of inversion for the integral transform defined by the equationwhere a >0, k > 0 and r-1f(r) εL (a, ∞). This transform appeared in connection with an earlier investigation [4] in which an attempt was made to devise an integral transform that could be adapted to the solution of ...
openaire   +3 more sources

Terrestrial ecosystem carbon flux estimated using GOSAT and OCO-2 XCO2 retrievals [PDF]

open access: yesAtmospheric Chemistry and Physics, 2019
In this study, both the Greenhouse Gases Observing Satellite (GOSAT) and the Orbiting Carbon Observatory 2 (OCO-2) XCO2 retrievals produced by the NASA Atmospheric CO2 Observations from Space (ACOS) project (version b7.3) are assimilated within the GEOS ...
H. Wang   +6 more
doaj   +1 more source

Inversion of Terrain Slope and Roughness with Satellite Laser Altimeter Full-Waveform Data Assisted by Shuttle Radar Topographic Mission

open access: yesRemote Sensing, 2021
Slope and roughness are basic geophysical properties of terrain surface, and also sources of error in satellite laser altimetry systems. The full-waveform satellite laser altimeter records the complete echo waveform backscattered from the target surface ...
Zhiqiang Zuo   +5 more
doaj   +1 more source

Solutions of certain initial-boundary value problems via a new extended Laplace transform

open access: yesNonlinear Engineering
In this article, we present a novel extended exponential kernel Laplace-type integral transform. The Laplace, natural, and Sumudu transforms are all included in the suggested transform.
Almalki Yahya   +2 more
doaj   +1 more source

Inverse Measures, the Inversion Formula, and Discontinuous Multifractals

open access: yesAdvances in Applied Mathematics, 1997
The authors introduce the notion of the inverse measure \(\mu^*\) to a given probability measure \(\mu\) on the unit interval \([0,1]\) in a language adopted for the physicist. If \(M\) is the distribution function of \(\mu\), requiring additionally \(M\) to be strictly increasing, then the inverse function \(M^*\) to \(M\) is also a distribution ...
Mandelbrot, Benoit, Riedi, Rudolf H.
openaire   +2 more sources

Choroid Plexus Enlargement and USPIO‐Based Inflammatory Feature in Cerebral Small Vessel Disease

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective The choroid plexus (CP) is a key component of the blood–cerebrospinal fluid barrier (BCSFB), but its mechanism of action in cerebral small vessel disease (CSVD) remains unclear. This study investigated CP volume (CPV) alterations and their association with conventional imaging markers in CSVD and explored the underlying role of ...
Yongqiang Qu   +11 more
wiley   +1 more source

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