Results 11 to 20 of about 1,328,641 (294)

Numerical Study of the Influence of Fishnet Mesh Size on a Floating Platform

open access: yesJournal of Marine Science and Engineering, 2020
This study aims to investigate the influence of fishnet mesh size on a floating platform. A self-developed, time-domain numerical model was used for the evaluation.
Hung-Jie Tang   +2 more
doaj   +1 more source

Two-dimensional fast imaging of airborne EM data based on U-net

open access: yesFrontiers in Earth Science, 2023
As an efficient geophysical exploration tool, the airborne electromagnetic (AEM) method has been widely used in mineral exploration, geological mapping, environmental and engineering investigation, etc.
Qiang Liu   +6 more
doaj   +1 more source

Frequency-Domain Streak Camera And Tomography For Ultrafast Imaging Of Evolving And Channeled Plasma Accelerator Structures [PDF]

open access: yes, 2010
We demonstrate a prototype Frequency Domain Streak Camera (FDSC) that can capture the picosecond time evolution of the plasma accelerator structure in a single shot. In our prototype Frequency-Domain Streak Camera, a probe pulse propagates obliquely to a
Dong, P.   +5 more
core   +1 more source

Harmonics Signal Feature Extraction Techniques: A Review

open access: yesMathematics, 2023
Harmonic estimation is essential for mitigating or suppressing harmonic distortions in power systems. The most important idea is that spectrum analysis, waveform estimation, harmonic source classification, source location, the determination of harmonic ...
Minh Ly Duc, Petr Bilik, Radek Martinek
doaj   +1 more source

Frequency-domain waveform approximants capturing Doppler shifts [PDF]

open access: yes, 2018
Gravitational wave astrophysics has only just begun, and as current detectors are upgraded and new detectors are built, many new, albeit faint, features in the signals will become accessible.
Chamberlain, Katie   +3 more
core   +4 more sources

Frequency-Domain Analysis of Linear Time-Periodic Systems [PDF]

open access: yes, 2004
In this paper, we study convergence of truncated representations of the frequency-response operator of a linear time-periodic system. The frequency-response operator is frequently called the harmonic transfer function. We introduce the concepts of input,
Bernhardsson, Bo   +2 more
core   +1 more source

Multi-Distance Frequency-Domain Optical Measurements of Coherent Cerebral Hemodynamics

open access: yesPhotonics, 2019
We report non-invasive, bilateral optical measurements on the forehead of five healthy human subjects, of 0.1 Hz oscillatory hemodynamics elicited either by cyclic inflation of pneumatic thigh cuffs, or by paced breathing. Optical intensity and the phase
Giles Blaney   +4 more
doaj   +1 more source

Mapping of Agricultural Subsurface Drainage Systems Using a Frequency-Domain Ground Penetrating Radar and Evaluating Its Performance Using a Single-Frequency Multi-Receiver Electromagnetic Induction Instrument

open access: yesSensors, 2020
Subsurface drainage systems are commonly used to remove surplus water from the soil profile of a poorly drained farmland. Traditional methods for drainage mapping involve the use of tile probes and trenching equipment that are time-consuming, labor ...
Triven Koganti   +5 more
doaj   +1 more source

Frequency Synchronization in Frequency Domain OFDM-IM based WLAN Systems

open access: yesJournal of Communications Software and Systems, 2023
The next-generation of wireless local area network systems are being conceptualized with new applications, smart devices and use cases which mandate unprecedented levels of high data rates, spectral efficiency, reliability, low latency and high energy ...
Lalitha H, Navin Kumar
doaj   +1 more source

Frequency-Domain Detection for Frequency-Division Multiplexing QEPAS

open access: yesSensors, 2022
To achieve multi-gas measurements of quartz-enhanced photoacoustic spectroscopy (QEPAS) sensors under a frequency-division multiplexing mode with a narrow modulation frequency interval, we report a frequency-domain detection method. A CH4 absorption line
Xiang Chen   +6 more
doaj   +1 more source

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