Results 31 to 40 of about 110,673 (257)

Rigorous Sensor Model of Gaofen-7 Satellite Laser Altimeter Based on Coupled Footprint Camera

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
The Gaofen-7 (GF-7) satellite system adds a footprint camera that shares the same optical path as its laser altimeter to ensure consistent spatial referencing between the laser footprint point and the obtained optical images.
Shaoning Li, Guo Zhang, Xiufang Fan
doaj   +1 more source

Universally Decodable Matrices for Distributed Matrix-Vector Multiplication [PDF]

open access: yes, 2019
Coded computation is an emerging research area that leverages concepts from erasure coding to mitigate the effect of stragglers (slow nodes) in distributed computation clusters, especially for matrix computation problems. In this work, we present a class
Ramamoorthy, Aditya   +3 more
core   +4 more sources

Congruence and non-congruence subgroups of the (2,3,7)-group [PDF]

open access: yes, 2006
Let [DELTA] denote the (2,3,7)-group. We establish an upper bound for the number of congruence subgroups of index n and a lower bound for the total number of subgroups of index n.
Stothers, W.W.
core   +2 more sources

A Separate Calibration Method of Laser Pointing and Ranging for the GF-7 Satellite Laser That Does Not Require Field Detectors

open access: yesRemote Sensing, 2022
Satellite laser altimeters have been widely used in the surveying, mapping, forestry, and polar regions and by other industries due to their excellent elevation measurement accuracy.
Ren Liu   +5 more
doaj   +1 more source

Comparison of Integrating GF-7 and ICESat-2 Laser Altimetry Data with High-resolution Stereo Images for Stereo Mapping [PDF]

open access: yesISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Currently, two types of satellite laser altimetry systems are in operation: the full waveform linear system and the single-photon-counting system, which exhibit significant differences in both data format and processing methodologies.
J. Chen, G. Li, J. Guo, J. Peng, J. Peng
doaj   +1 more source

On the classification of self-dual [20,10,9] codes over GF(7)

open access: yesFinite Fields and Their Applications, 2016
10 pages, minor ...
Masaaki Harada, Akihiro Munemasa
openaire   +2 more sources

Electronic spectrum and superconductivity in the $t$-$J$ model on the honeycomb lattice [PDF]

open access: yes, 2018
A microscopic theory of electronic spectrum and superconductivity within the $t$-$J$ model on the honeycomb lattice is formulated. The Dyson equation for the normal and anomalous Green functions for the two-band model in terms of the Hubbard operators is
Plakida, N. M.
core   +3 more sources

Extraction of Pig Farms From GaoFen Satellite Images Based on Deep Learning

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2023
Accurate information on the spatial distribution and area of pig farms is essential for pig breeding monitoring, pork production estimation, and environmental governance of pig breeding. Governmental regulatory departments mostly rely on field surveys to
Jielin Guan   +5 more
doaj   +1 more source

Unlabeled equivalence for matroids representable over finite fields [PDF]

open access: yes, 2012
We present a new type of equivalence for representable matroids that uses the automorphisms of the underlying matroid. Two $r\times n$ matrices $A$ and $A'$ representing the same matroid $M$ over a field $F$ are {\it geometrically equivalent ...
Kingan, S. R.
core   +1 more source

Novel active-compensated weighted summer [PDF]

open access: yes, 1980
A summer amplifier with extended bandwidth is proposed. Compensation of the frequency characteristics is achieved by employing two operational amplifiers instead of external reactive ...
Huertas Díaz, José Luis   +1 more
core   +1 more source

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