Results 21 to 30 of about 75,305 (259)
Al-Jabar, 2016 This study aims to determine the difficulties experienced by students in understanding the double integral in polar coordinates advanced calculus courses and the factors that cause these problems. This research is qualitative.
Davi Apriandi, Ika Krisdiana
doaj +1 more source
Implicit Guidance Equations in Polar Coordinates [PDF]
فصلنامه علوم و فناوری فضایی, 2015 In this paper, implicit guidance equations are derived in polar coordinates. Depending on applications, implicit guidance equations in polar coordinates may be preferred over cartesian coordinates.
Seyed Hamid Jalali Naini
doaj
Integer Polar Coordinates for Compression [PDF]
2007 IEEE International Symposium on Information Theory, 2007 This paper introduces a family of integer-to-integer approximations to the Cartesian-to-polar coordinate transformation and analyzes its application to lossy compression. A high-rate analysis is provided for an encoder that first uniformly scalar quantizes, then transforms to "integer polar coordinates," and finally separately entropy codes angle and ...
Demba E. Ba, Vivek K. Goyal
openaire +1 more source
AIP Advances, 2022 The pillow effect is a key weakening factor in the surface accuracy of mesh antennas. Previous studies, however, have significant limitations in such antennas because they have been largely based on specific assumptions, which have failed to investigate ...
Pengfei Huang +3 more
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Моделирование и анализ информационных систем, 2015 A version of the method of collocations and least residuals is proposed for the numerical solution of the Poisson equation in polar coordinates on non-uniform grids.
E. V. Vorozhtsov, V. P. Shapeev
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Toolbox for the Computation of 2D Fourier Transforms in Polar Coordinates via Maple
Journal of Open Research Software, 2015 The Fourier transform is one of the most useful tools in science and engineering and can be expanded to multi-dimensions and curvilinear coordinates. A toolbox of functions for the computation of two dimensional Fourier transforms in polar coordinates ...
Edem Dovlo, Natalie Baddour
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The zonal satellite problem. III Symmetries [PDF]
Serbian Astronomical Journal, 2002 The two-body problem associated with a force field described by a potential of the form U =Sum(k=1,n) ak/rk (r = distance between particles, ak = real parameters) is resumed from the only standpoint of symmetries.
Mioc V.
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Mathematics, 2021 For scientists and engineers, the Laplacian operator is a fundamental tool that has made it possible to carry out important frontier studies involving wave propagation, potential theory, heat conduction, the distribution of stresses in a deformable solid
Ana Laura Pérez-Martínez +2 more
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Leg Locomotion Adaption for Quadruped Robots with Ground Compliance Estimation
Applied Bionics and Biomechanics, 2020 Locomotion control for quadruped robots is commonly applied on rigid terrains with modelled contact dynamics. However, the robot traversing different terrains is more important for real application.
Songyuan Zhang, Hongji Zhang, Yili Fu
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Liver organoids: modelling complexity in homeostasis and disease
FEBS Letters, EarlyView.Studying liver in vitro has been challenging because simple 2D cell cultures fail to capture liver's cellular and architectural complexity. To bridge this gap, scientists increasingly use organoids, 3D liver models which better mimic liver composition and function. This review examines recent advances in liver organoid complexity and realism, discusses
Anna M. Dowbaj, Meritxell Huch
wiley +1 more source