Results 1 to 10 of about 1,854,912 (269)

A Data-Driven Design for Gas Turbines Exit Temperature Spread Condition Monitoring System [PDF]

open access: yesJournal of Applied Research on Industrial Engineering, 2023
One of the most complex and costly systems in the industry is the Gas turbine (GT). Because of the complexity of these assets, various indicators have been used to monitor the health condition of different parts of the gas turbine.
Nastaran Hajarian   +2 more
doaj   +1 more source

Time-varying wavelet estimation and its applications in deconvolution and seismic inversion

open access: yesJournal of Petroleum Exploration and Production Technology, 2019
Wavelet holds an essential role in seismic data processing and characterization, for examples deconvolution and seismic inversion. Unfortunately, wavelet is an unknown data.
Waskito Pranowo
doaj   +1 more source

A Scheme for Estimating Time-Varying Wind Stress Drag Coefficient in the Ekman Model with Adjoint Assimilation

open access: yesJournal of Marine Science and Engineering, 2021
In this study, the time-varying wind stress drag coefficient in the Ekman model was inverted by the cubic spline interpolation scheme based on the adjoint method.
Xinping Wu   +3 more
doaj   +1 more source

Can Bitcoin be a safe haven in fear sentiment?

open access: yesTechnological and Economic Development of Economy, 2022
This paper explores how fear sentiment affects the price of Bitcoin by employing the rolling-window Granger causality tests. The analysis reveals negative influences from the volatility index (VIX) to Bitcoin price (BTC), which ascertains that Bitcoin ...
Chi-Wei Su   +3 more
doaj   +1 more source

Time-Varying Social-Aware Resource Allocation for Device-to-Device Communication

open access: yesIEEE Access, 2019
With the rapid development of wireless mobile communication, local content sharing has become the emerging demand for users who are geographically close. Device-to-device (D2D) communication allows two users to communicate directly with each other.
Gang Deng   +3 more
doaj   +1 more source

Time-Varying Granger Causality of COVID-19 News on Emerging Financial Markets: The Latin American Case

open access: yesMathematics, 2023
This study uses daily COVID-19 news series to determine their impact on financial market volatility. This paper assesses whether U.S. financial markets react differently to COVID-19 news than emerging markets and if such markets are impacted differently ...
Semei Coronado   +4 more
doaj   +1 more source

Deep Learning for Black-Box Modeling of Audio Effects

open access: yesApplied Sciences, 2020
Virtual analog modeling of audio effects consists of emulating the sound of an audio processor reference device. This digital simulation is normally done by designing mathematical models of these systems.
Marco A. Martínez Ramírez   +2 more
doaj   +1 more source

Long-Endurance Dynamic Path Planning Method of NSV Considering Wind Energy Capture

open access: yesJournal of Marine Science and Engineering, 2021
To meet the mission requirements of long-endurance and unmanned marine environment observation, the natural energy-driven unmanned surface vehicle (NSV) usually takes special sailing paths to increase energy capture to achieve the purpose of improving ...
Qi Jia   +5 more
doaj   +1 more source

Characterizing Rapid Fluctuations of Resting State Functional Connectivity in Demyelinating, Neurodegenerative, and Psychiatric Conditions: From Static to Time-Varying Analysis

open access: yesFrontiers in Neuroscience, 2019
Functional magnetic resonance imaging (fMRI) at resting state (RS) has been widely used to characterize the main brain networks. Functional connectivity (FC) has been mostly assessed assuming that FC is static across the whole fMRI examination.
Paola Valsasina   +7 more
doaj   +1 more source

Time-Varying Mobile Edge Computing for Capacity Maximization

open access: yesIEEE Access, 2020
Capacity is a fundamental metric for mobile edge computing scenarios, where the system state plays an important role. Previous studies have mostly been based on the premise that the system state is stable.
Yunyun Cai, Peiyan Yuan
doaj   +1 more source

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