Results 21 to 30 of about 2,158,968 (267)

Some optimal control problems of heat equations with weighted controls

open access: yesBoundary Value Problems, 2017
In this paper, the time and norm optimal control problems of controlled heat equations with a weight function are considered. For the time optimal problems, we study the following two cases: one is for equations with multi-domain control under null ...
Shufang Liu, Dandan Liu, Guoqi Wang
doaj   +1 more source

Spherical approximating and interpolating moving least squares in geodesy and geophysics: a case study for deriving gravity acceleration at sea surface in the Persian Gulf

open access: yesJournal of Geodetic Science, 2020
This paper is aimed at introducing the concept of Spherical Interpolating Moving Least Squares to the problems in geodesy and geophysics. Based on two previously known methods, namely Spherical Moving Least Squares and Interpolating Moving Least Squares,
Kiani M.
doaj   +1 more source

Hypotheses Tests for Circular Data in Weighted Sampling [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2023
This paper is concerned with the problem of statistical hypotheses testing in circular data under weighted sampling. The most powerful test has been obtained when the sampling is subjected to a weight function. Different weight functions are examined for
Fatemeh Shahsanei, Rahim Chinipardaz
doaj   +1 more source

A Hilbert-type fractal integral inequality and its applications

open access: yesJournal of Inequalities and Applications, 2017
By using thefractal theory and the methods of weight function, a Hilbert-type fractal integral inequality and its equivalent form are given. Their constant factors are proved being the best possible, and their applications are discussed briefly.
Qiong Liu, Wenbing Sun
doaj   +1 more source

Estimating the Inversion Accuracy of Atmospheric Temperature and Water Vapor Profile Under Limb Sounding

open access: yes应用气象学报, 2020
Profiles of atmospheric temperature and water vapor are important for studying atmospheric state and play an important role in the energy balance of earth-atmosphere system.
Zong Xuemei
doaj   +1 more source

Weighted biharmonic green functions for rational weights [PDF]

open access: yesGlasgow Mathematical Journal, 1999
This paper deals with weighted biharmonic operators of the form \(\Delta|P'|^2\Delta\) on the unit disc, where \(\Delta\) is the Laplacian and \(P\) is a rational function. The existence of the Green function for this operator is established for any rational function \(P\), and an algorithm is provided for obtaining it (by solving a certain system of ...
openaire   +2 more sources

Generalizations of Hardy's integral inequalities

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1999
This paper deals with some new generalizations of Hardy's integral inequalities. Some cases concerning whether the constant factors involved in these inequalities are best possible are discussed in some detail.
Yang Bicheng, Lokenath Debnath
doaj   +1 more source

The Multi-Parametric Weight Optimization of a Hydraulic Actuator

open access: yesActuators, 2020
This research was derived from the experimental observation that hydraulic actuators are positioned on machines that are subjected to movements and whose dynamic actions, the accelerations, are very high; it is acceptable to think of an actuator for an ...
Luigi Solazzi   +2 more
doaj   +1 more source

Research algorithm restoring signals in the basis of exponential functions

open access: yesВестник Самарского государственного технического университета. Серия: Технические науки, 2020
The paper proposes a method for constructing digital filters for solving inverse problems of recovering signals, time series, and images using an approximation approach.
Vitaly I. Batishchev, Aleksey G. Zolin
doaj   +1 more source

Multipliers of Banach valued weighted function spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2000
We generalize Banach valued spaces to Banach valued weighted function spaces and study the multipliers space of these spaces. We also show the relationship between multipliers and tensor product of Banach valued weighted function spaces.
Serap Öztop
doaj   +1 more source

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