Results 21 to 30 of about 1,922,795 (290)

EXPERIMENTAL DEM EXTRACTION FROM ASTER STEREO PAIRS AND 3D REGISTRATION BASED ON ICESAT LASER ALTIMETRY DATA IN UPSTREAM AREA OF LAMBERT GLACIER, ANTARCTICA [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
DEM Extraction from ASTER stereo pairs and three-dimensional registration by reference to ICESat laser altimetry data are carried out in upstream area of Lambert Glacier, East Antarctica.
G. Hai   +11 more
doaj   +1 more source

Asymptotics of lattice walks via analytic combinatorics in several variables [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2020
We consider the enumeration of walks on the two-dimensional non-negative integer lattice with steps defined by a finite set S ⊆ {±1, 0}2 . Up to isomorphism there are 79 unique two-dimensional models to consider, and previous work in this area has used ...
Stephen Melczer, Mark C. Wilson
doaj   +1 more source

IMPROVING THE ACCURACY OF ESTIMATED 3D POSITIONS USING MULTI-TEMPORAL ALOS/PRISM TRIPLET IMAGES [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
In this paper, we present a method to improve the accuracy of a digital surface model (DSM) by utilizing multi-temporal triplet images. The Advanced Land Observing Satellite (ALOS) / Panchromatic Remote-sensing Instrument for Stereo Mapping (PRISM ...
J. Susaki, H. Kishimoto
doaj   +1 more source

Computation of the Highest Coefficients of Weighted Ehrhart Quasi-polynomials of Rational Polyhedra [PDF]

open access: yesFoundations of Computational Mathematics, 2011
This article concerns the computational problem of counting the lattice points inside convex polytopes, when each point must be counted with a weight associated to it. We describe an efficient algorithm for computing the highest degree coefficients of the weighted Ehrhart quasi-polynomial for a rational simple polytope in varying dimension, when the ...
BALDONI, MARIA   +4 more
openaire   +5 more sources

RPC-Based Orthorectification for Satellite Images Using FPGA

open access: yesSensors, 2018
Conventional rational polynomial coefficients (RPC)-based orthorectification methods are unable to satisfy the demands of timely responses to terrorist attacks and disaster rescue.
Rongting Zhang   +4 more
doaj   +1 more source

IMPROVEMENT OF DEM GENERATION FROM ASTER IMAGES USING SATELLITE JITTER ESTIMATION AND OPEN SOURCE IMPLEMENTATION [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) system embarked on the Terra (EOS AM-1) satellite has been a source of stereoscopic images covering the whole globe at a 15m resolution at a consistent quality for over 15 years ...
L. Girod, C. Nuth, A. Kääb
doaj   +1 more source

Sums of squares of polynomials with rational coefficients [PDF]

open access: yesJournal of the European Mathematical Society, 2016
We construct families of explicit (homogeneous) polynomials f over \mathbb Q that are sums of squares of polynomials over \
openaire   +3 more sources

A globally asymptotically stable polynomial vector field with rational coefficients and no local polynomial Lyapunov function [PDF]

open access: yesSystems & Control Letters, 2018
We give an explicit example of a two-dimensional polynomial vector field of degree seven that has rational coefficients, is globally asymptotically stable, but does not admit an analytic Lyapunov function even locally.
Amir Ali Ahmadi, Bachir El Khadir
openaire   +4 more sources

Optical satellite sensor and positioning accuracy analysis for the Hongqi-1-H9 wide-range satellite in different terrains

open access: yesEURASIP Journal on Wireless Communications and Networking, 2021
The excellent performance of geometric positioning of a newly launched satellite will greatly broaden its application field. Launched on January 15, 2020, the Hongqi-1-H9 wide-range satellite is the largest sub-meter-level satellite worldwide and the ...
Wenping Song   +6 more
doaj   +1 more source

Approximation by rational functions with polynomials of positive coefficients as the denominators

open access: yesAnalysis in Theory and Applications, 2006
Summary: The present paper proves that if \(f(x)\in C_{[0,1]}\), changes its sign exactly \(l\) times at \(0< y_1 ...
Yu, Dansheng, Zhou, Songping
openaire   +1 more source

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