Results 31 to 40 of about 1,168,555 (296)
Influences of the state of ionospheric background on ionospheric heating effects
Annals of Geophysics, 2014 According to the well-performed ionospheric heating experiments at Arecibo in the low latitudes as well as at Tromsø in the high latitudes, the large-scale modification effects are simulated under an assumption of equivalent conditions, i.e., with the ...
Shuji Hao +6 more
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Wave Parameter Inversion Based on Sea Clutter Characteristics
Remote SensingAccurate acquisition of wave parameters is important for marine monitoring and target identification. Traditional methods are limited in sea state adaptability, real-time observation, and inversion accuracy.
Xiao Li +4 more
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Weight Loss Function for the Cooperative Inversion of Atmospheric Duct Parameters
Atmosphere, 2022 Low-altitude atmospheric ducts are abnormal atmospheric phenomena in the troposphere, impacting the operation of microwave or ultrashort wave radio systems.
Jie Han +7 more
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Annals 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
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Remote 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
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Exploring Marine Atmospheric Ducts: Current Sensing and Emerging Trends
Remote SensingTropospheric refraction significantly impacts the propagation of ultrashort- and microwave-frequency radio waves over marine environments. Atmospheric ducting, the most common super-refractive structure, allows radio waves to travel over the horizon ...
Jin-Peng Zhang +5 more
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Propagators and topology [PDF]
The 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.
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Proceedings 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.
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Machine Learning-Based Estimation of foF2 and MUF(3000)F2 Using GNSS Ionospheric TEC Observations
Remote SensingThis study developed machine learning models using different algorithms, including support vector machine (SVM), random forest (RF), and backpropagation neural network (BPNN), to estimate the critical frequency of the F2 layer (foF2) and the maximum ...
Yuhang Zhang +6 more
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Study on the layered dusty plasma structures in the summer polar mesopause [PDF]
Annales Geophysicae, 2010 Traditional hydrodynamic equations are adopted to build a one-dimensional theoretical model to study the effect of gravity wave on layered dusty plasma structures formation and evolution near the polar summer mesospause region associated with polar ...
Hui Li +4 more
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