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Direct Least Absolute Deviation Fitting of Ellipses [PDF]

open access: yesMathematical Problems in Engineering, 2020
Scattered data from edge detection usually involve undesired noise which seriously affects the accuracy of ellipse fitting. In order to alleviate this kind of degradation, a method of direct least absolute deviation ellipse fitting by minimizing the ℓ1 algebraic distance is presented.
Gang Zhou   +3 more
openaire   +1 more source

A Self-Calibration Stitching Method for Pitch Deviation Evaluation of a Long-Range Linear Scale by Using a Fizeau Interferometer

open access: yesSensors, 2021
An interferometric self-calibration method for the evaluation of the pitch deviation of scale grating has been extended to evaluate the pitch deviation of the long-range type linear scale by utilizing the stitching interferometry technique. Following the
Xin Xiong   +3 more
doaj   +1 more source

The optimization algorithm for application in directional drilling trajectories of energy field

open access: yesEnergy Reports, 2022
Recently, the directional drilling technology (DDT) has been extensive used in many energy field such as coal geological exploration, gas drainage and artificial freezing engineering etc.
Shu-jie Liu   +3 more
doaj   +1 more source

Recovery process of vertical perception and activities of daily living in stroke patients: A retrospective cohort study

open access: yesBrain and Behavior, 2023
Introduction Clarifications regarding the recovery process of the subjective postural vertical (SPV) and activities of daily living in stroke patients are required to help clinicians determine treatment plans.
Kota Sawa   +9 more
doaj   +1 more source

Direct Evaluation of Large-Deviation Functions [PDF]

open access: yesPhysical Review Letters, 2006
We introduce a numerical procedure to evaluate directly the probabilities of large deviations of physical quantities, such as current or density, that are local in time. The large-deviation functions are given in terms of the typical properties of a modified dynamics, and since they no longer involve rare events, can be evaluated efficiently and over a
GIARDINA', Cristian   +2 more
openaire   +6 more sources

Simulation of the dynamic processes of a low-capacity combine harvester movement [PDF]

open access: yesE3S Web of Conferences, 2020
To automate the process of harvesting crops, different types of harvesting machines are required. The most common type of machines used to automate ingathering are harvesters.
Godzhaev Zakhid   +6 more
doaj   +1 more source

The deviation from eutectic composition in boundary layer for eutectic growth: a phase-field study [PDF]

open access: yesArchives of Metallurgy and Materials, 2019
In this paper, the deviation from eutectic composition in boundary layer for eutectic growth is studied by phase-field method. According to a series of artificial phase diagram, the lamellar eutectic growth of these alloy is simulated during directional ...
Zhixin Tu   +4 more
doaj   +1 more source

Directional asymmetry in gonad length indicates moray eels (Teleostei, Anguilliformes, Muraenidae) are “right-gonadal”

open access: yesScientific Reports, 2023
Directional asymmetry indicates a unidirectional deviation from perfect bilateral symmetry, which was rarely examined in the inner organs of the teleost (Teleostei) compared to external traits.
Yu-Jia Lin, Hong-Ming Chen
doaj   +1 more source

Anomalous Long‐Distance Propagation of ILS LOC Signals by the Es Layer and Its Impact on Aviation Receivers

open access: yesSpace Weather, 2023
Anomalous long‐distance propagation of Very High Frequency radio waves of aeronautical navigation systems was investigated by an airborne Instrument Landing System (ILS) localizer (ILS LOC) receiver installed on the ground at Kure, Japan (34.245°N, 132 ...
S. Saito   +3 more
doaj   +1 more source

Multi-resolution anisotropy studies of ultrahigh-energy cosmic rays detected at the Pierre Auger Observatory [PDF]

open access: yes, 2017
We report a multi-resolution search for anisotropies in the arrival directions of cosmic rays detected at the Pierre Auger Observatory with local zenith angles up to $80^\circ$ and energies in excess of 4 EeV ($4 \times 10^{18}$ eV).
Aab, A.   +402 more
core   +3 more sources

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