Results 11 to 20 of about 911,075 (316)
Overview of total least-squares methods
Signal Processing, 2007 We review the development and extensions of the classical total least squares method and describe algorithms for its generalization to weighted and structured approximation problems.
Ivan Markovsky, Sabine Van Huffel
exaly +1 more source
Polar stratospheric nitric acid depletion surveyed from a decadal dataset of IASI total columns [PDF]
Atmospheric Chemistry and Physics, 2022 In this paper, we exploit the first 10-year data record (2008–2017) of nitric acid (HNO3) total columns measured by the IASI-A/MetOp infrared sounder, characterized by an exceptional daily sampling and a good vertical sensitivity in the lower-to-mid ...
C. Wespes +7 more
doaj +1 more source
Ethylene industrial emitters seen from space
Nature Communications, 2022 Combining 13 years of satellite measurements led to the discovery of 300 global hotspots of atmospheric ethylene (C2H4). They are found to be linked to heavy industries and megacities, and are currently misrepresented in emission inventories.
Bruno Franco +5 more
doaj +1 more source
A CO2-independent cloud mask from Infrared Atmospheric Sounding Interferometer (IASI) radiances for climate applications [PDF]
Atmospheric Measurement Techniques, 2022 With more than 15 years of continuous and consistent measurements, the Infrared Atmospheric Sounding Interferometer (IASI) radiance dataset is becoming a reference climate data record.
S. Whitburn +7 more
doaj +1 more source
Covering Squares with Squares [PDF]
Discrete & Computational Geometry, 2000 The authors consider covering a square \(Q\) by the sequence \(\{Q_n\}\) of squares, where \(Q_n\) has side of length \(x^n\) for \(n=1,2,\dots\).
H. L. Abbott, Meir Katchalski
openaire +1 more source
Heritage, 2023 Squares in the urban historical built environment are public open spaces prone to the risk of terrorist acts, essentially because they are ideal soft targets and attract significant user densities. Risk assessment methods should consider how users behave
Enrico Quagliarini +2 more
doaj +1 more source
On the weekly cycle of atmospheric ammonia over European agricultural hotspots
Scientific Reports, 2022 The presence of a weekly cycle in the abundance of an atmospheric constituent is a typical fingerprint for the anthropogenic nature of its emission sources. However, while ammonia is mainly emitted as a consequence of human activities, a weekly cycle has
Martin Van Damme +7 more
doaj +1 more source
Amenities and Sanitation in Golden Horde Cities
Археология евразийских степей, 2022 The paper discusses various aspects of the urban amenities of Golden Horde cities. Archaeological evidence suggests that they had wide streets and large paved squares, often decorated with fountains.
Emma D. Zilivinskaya
doaj +1 more source
Online Square-into-Square Packing [PDF]
Algorithmica, 2013 In 1967, Moon and Moser proved a tight bound on the critical density of squares in squares: any set of squares with a total area of at most 1/2 can be packed into a unit square, which is tight. The proof requires full knowledge of the set, as the algorithmic solution consists in sorting the objects by decreasing size, and packing them greedily into ...
Sándor P. Fekete +1 more
openaire +2 more sources
Trends in spectrally resolved outgoing longwave radiation from 10 years of satellite measurements
npj Climate and Atmospheric Science, 2021 In recent years, the interest has grown in satellite-derived hyperspectral radiance measurements for assessing the individual impact of climate drivers and their cascade of feedbacks on the outgoing longwave radiation (OLR).
Simon Whitburn +8 more
doaj +1 more source