Results 1 to 10 of about 128,087 (164)

A Curve Approximation Approach Using Bio-inspired Polar Coordinate Bald Eagle Search Algorithm

open access: yesInternational Journal of Computational Intelligence Systems, 2022
In this paper, a curve approximation approach using bio-inspired polar coordinate bald eagle search algorithm (PBES) is proposed. PBES algorithm is inspired by the spiral mechanism of bald eagle during predation.
Yunhui Zhang   +4 more
doaj   +2 more sources

An Improved Parametric Polar Format Algorithm for Missile-Borne SAR Imaging With a Dive and Curve Trajectory

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Due to the 2-D spatial variability of the range model during the missile-borne synthetic aperture radar (SAR) flight along a dive and curve trajectory, the accuracy of traditional algorithms is limited.
Zirui Xi   +5 more
doaj   +3 more sources

Market Polarization and the Phillips Curve [PDF]

open access: yesSSRN Electronic Journal, 2021
Summary of Banco de España Working Paper no ...
Andrés Domingo, Javier Angel   +2 more
openaire   +2 more sources

On the Approximate Polar Curves of Foliations

open access: yesMathematics, 2023
We present a decomposition theorem of the generic polar curves of a generalized curve foliation with only one separatrix and the Hamiltonian foliations defined by the approximate roots of the generatrix.
Percy Fernández-Sánchez   +2 more
doaj   +1 more source

Prediction model of decompression wave velocity in supercritical CO2 pipelines containing impurities

open access: yesYou-qi chuyun, 2021
Once a supercritical CO2 pipeline fractures, decompression wave will appear at both end of the crack. Hence, the calculation of the decompression wave velocity during the pipeline fracturing is critical for the prediction and control of pipeline fracture.
Yuxing LI   +3 more
doaj   +1 more source

The method for synthesis of the contact ratio of noncircular bevel gears [PDF]

open access: yesMechanical Sciences, 2021
As a type of spatial transmission mechanism, noncircular bevel gears can be used to transfer the power and motion with a variable transmission ratio between intersecting axes. In this paper, utilizing the spherical triangle theorem and meshing principle,
K. Shi, S. Lin, Y. Yao
doaj   +1 more source

Image polar radius distribution for seed orientation adjustment

open access: yesApplied Artificial Intelligence, 2023
Seed orientation is an important factor in high-speed automatic seeders used for sowing crops such as garlic cloves and corn kernels. However, obtaining accurate seed orientation angles can be challenging due to high-frequency noise points and false top ...
Yafeng Zhang   +3 more
doaj   +1 more source

Investigation of N-polar InGaN growth on misoriented ScAlMgO4 substrates

open access: yesScientific Reports, 2023
We report the growth of N-polar InGaN layers on misoriented ScAlMgO4 (SAM) substrates with offset of 0.3 to 5.8° toward the m-plane. The surface of N-polar InGaN with small-offset substrates exhibited hexagonal hillocks similar to those commonly observed
Mohammed A. Najmi   +3 more
doaj   +1 more source

Finite Element Analysis of Curved Beam Elements Employing Trigonometric Displacement Distribution Patterns

open access: yesBuildings, 2023
A finite element analysis (FEA) model was developed for Euler and Timoshenko curved beam elements by incorporating trigonometric displacement distribution patterns.
Hengtao Cao   +4 more
doaj   +1 more source

On the direction of remanent magnetization of the quartz porphyry dikes in SE Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1986
Attempts are made to determine the direction of remanent magnetization of the rapakivi varieties belonging to the Wiborg (Viipuri) rapakivi massif and its satellites in the precambrian Baltic Shield. Hard and stable remanence was found only in the quartz
K.J. Neuvonen
doaj   +1 more source

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