Results 31 to 40 of about 1,209,286 (305)

Low-altitude laser propagation link over a marine surface

open access: yes, 2022
A 1.55µm Laser Propagation Testbed (LPT) has been deployed over a 3.5 km stretch of open water between the port of Den Helder and the island of Texel in The Netherlands.
Scheers, Loes   +5 more
core   +1 more source

Preliminary observation results of the Coherent Beacon System onboard the China Seismo-Electromagnetic Satellite-1

open access: yesEarth and Planetary Physics, 2018
This paper reports, for the first time, observation results of the Coherent Beacon System (CBS) onboard the China Seismo-Electromagnetic Satellite-1 (CSES-1).
Liang Chen   +5 more
doaj   +1 more source

Application of Semi-Airborne Frequency Domain Electromagnetic Data Based on Improved Ant-Colony-Optimized Wavelet Threshold Denoising Method

open access: yesIEEE Access, 2022
The semi-airborne frequency domain electromagnetic detection method is a popular electromagnetic detection method in which the transmission system is excited on the ground and the reception system coil is in the air to measure the vertical magnetic field
Jigen Xia   +5 more
doaj   +1 more source

On the propagation of dependences [PDF]

open access: yesPacific Journal of Mathematics, 1989
We quote the author's abstract: ``An alternative proof of recent uniqueness theorems by Shanyu Ji is given. Ji's results are extended to the propagation of certain dependences from analytic subsets to the total space. Also these results are lifted from \({\mathbb{C}}^ m\) to ramified covering spaces of \({\mathbb{C}}^ m\).
openaire   +3 more sources

Probability propagation [PDF]

open access: yesAnnals of Mathematics and Artificial Intelligence, 1990
In this paper we give a simple account of local computation of marginal probabilities for when the joint probability distribution is given in factored form and the sets of variables involved in the factors form a hypertree. Previous expositions of such local computation have emphasized conditional probability.
Glenn Shafer, Prakash P. Shenoy
openaire   +2 more sources

Propagation measurements to support third generation mobile radio network planning [PDF]

open access: yes, 1993
The features of the radio network planning tool proposed by the European RACE Advanced Cell Planning Methods and Tools for Third Generation Mobile Radio Systems (PLATON) project are described.
J.C.S. Cheung   +5 more
core   +1 more source

Gradient term filtering for stable sound propagation with linearized Euler equations [PDF]

open access: yes, 2014
A new, stable gradient term filtering (GTF) method is applied to time-domain linearised Euler equations (LEE) to compute sound propagation problems. The method employs a Laplace operator as a filter to obtain acoustic wave mponents. Through the filtering
Zhang, Xin   +6 more
core   +1 more source

A Classifying-Inversion Method of Offshore Atmospheric Duct Parameters Using AIS Data Based on Artificial Intelligence

open access: yesRemote Sensing, 2022
Atmospheric duct parameters inversion is an important aspect of microwave-band radar and communication system performance evaluation. AIS (Automatic Identification System) is one of the signal sources used for atmospheric duct parameters inversion ...
Jie Han   +7 more
doaj   +1 more source

Propagators and topology [PDF]

open access: yesThe European Physical Journal C, 2015
Two popular perspectives on the non-perturbative domain of Yang-Mills theories are either in terms of the gluons themselves or in terms of collective gluonic excitations, i.e. topological excitations. If both views are correct, then they are only two different representations of the same underlying physics.
openaire   +3 more sources

Entire Propagator [PDF]

open access: yesProceedings of the American Mathematical Society, 1994
We construct an entire solution for an evolutionary Cauchy problem when the initial data is an entire vector of an appropriate operator in a Banach space. We give a sufficient condition for an entire domination. Our results are applied to some partial differential equations including the Dirac system.
Autret, L., Emamirad, H.
openaire   +2 more sources

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