Results 11 to 20 of about 842,482 (293)

Shadow Theory of Diffraction Grating: Reciprocity, Symmetry and Average Filter [PDF]

open access: yesIEICE Transactions on Electronics, 2014
In the theory of periodic gratings, there is no method to make up a numerical solution that satisfies the reciprocity so far. On the basis of the shadow theory, however, this paper proposes a new method to obtain a numerical solution that satisfies the ...
NAKAYAMA, Junichi, TAMURA, Yasuhiko
core   +3 more sources

0.5-V Nano-Power Shadow Sinusoidal Oscillator Using Bulk-Driven Multiple-Input Operational Transconductance Amplifier

open access: yesSensors, 2023
This paper presents a low-frequency shadow sinusoidal oscillator using a bulk-driven multiple-input operational transconductance amplifier (MI-OTA) with extremely low-voltage supply and nano-power consumption.
Fabian Khateb   +3 more
doaj   +1 more source

Refined UNet V4: End-to-End Patch-Wise Network for Cloud and Shadow Segmentation with Bilateral Grid

open access: yesRemote Sensing, 2022
Remote sensing images are usually contaminated by cloud and corresponding shadow regions, making cloud and shadow detection one of the essential prerequisites for processing and translation of remote sensing images.
Libin Jiao   +4 more
doaj   +1 more source

Autonomous Navigation Based on the Earth-Shadow Observation near the Sun–Earth L2 Point

open access: yesApplied Sciences, 2022
This paper is devoted to a novel autonomous navigation method for spacecraft around the Sun–Earth L2 point. In contrast to the previous navigation methods, which rely on ground-based or inter-spacecraft measurements, the proposed method determines the ...
Qian Li   +3 more
doaj   +1 more source

Moving Shadow Detection in Video Using Cepstrum [PDF]

open access: yes, 2010
Moving shadows constitute problems in various applications such as image segmentation and object tracking. The main cause of these problems is the misclassification of the shadow pixels as target pixels.
Çetin, A. Enis   +5 more
core   +2 more sources

Video SAR Moving Target Tracking Using Joint Kernelized Correlation Filter

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Video synthetic aperture radar (ViSAR) has been found very useful for the surveillance of ground moving targets. The target energy can be utilized for ground moving target tracking, while the dynamic shadows of moving targets enable an alternative ...
Chao Zhong, Jinshan Ding, Yuhong Zhang
doaj   +1 more source

Moving Vehicle Detection and Tracking Based on Optical Flow Method and Immune Particle Filter under Complex Transportation Environments

open access: yesComplexity, 2020
Video-based moving vehicle detection and tracking is an important prerequisite for vehicle counting under complex transportation environments. However, in the complex natural scene, the conventional optical flow method cannot accurately detect the ...
Wei Sun, Min Sun, Xiaorui Zhang, Mian Li
doaj   +1 more source

Comparison of High-Speed Polarization Imaging Methods for Biological Tissues

open access: yesSensors, 2022
We applied a polarization filter array and high-speed camera to the imaging of biological tissues during large, dynamic deformations at 7000 frames per second.
Xianyu Wu   +4 more
doaj   +1 more source

A Novel Approach to Shadow Boundary Detection Based on an Adaptive Direction-Tracking Filter for Brain-Machine Interface Applications

open access: yesApplied Sciences, 2020
In this paper, a Brain-Machine Interface (BMI) system is proposed to automatically control the navigation of wheelchairs by detecting the shadows on their route.
Ziyi Ju   +4 more
doaj   +1 more source

Improvement of Turbine Inertia Compensation in Wind Turbine Emulators using Kalman Filter [PDF]

open access: yesInternational Journal of Research and Technology in Electrical Industry, 2023
In this paper, a 3.1kW DC motor is used to simulate the static and dynamic behavior of a horizontal axis wind turbine. The effect of the difference between the wind turbine's inertia and DC motor on the dynamic behavior of the system, torque oscillation ...
Mansour Rafiee   +2 more
doaj   +1 more source

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