Results 1 to 10 of about 2,148,029 (249)

Analysis of Longitudinal Guided Wave Propagation in a Liquid-Filled Pipe Embedded in Porous Medium

open access: yesApplied Sciences, 2021
To study the leakage situation of a liquid-filled pipe in long-term service, a model of a liquid-filled pipe embedded in an infinite porous medium as well as in a finite porous medium is designed.
Nana Su   +4 more
doaj   +1 more source

Multi-Objective Planning of Distributed Photovoltaic Power Generation Based on Multi-Attribute Decision Making Theory

open access: yesIEEE Access, 2020
Photovoltaic (PV) power generation has been heavily connected into distribution network recently. However, the intermittent and uncertainty of PV generation system will significantly affect the security operation of distribution network.
Changchun Cai   +4 more
doaj   +1 more source

Double Recurrent Perturbation Fuzzy Neural Network Fractional-Order Sliding Mode Control of Micro Gyroscope

open access: yesIEEE Access, 2021
In this paper, a fractional-order sliding mode control method based on a double recurrent perturbation fuzzy neural network (DRPFNN) is proposed for a micro gyroscope system with parameter uncertainty and external disturbance.
Fang Chen, Juntao Fei, Yuncan Xue
doaj   +1 more source

Device for online monitoring of insulation faults in high-voltage switchgears

open access: yesInternational Journal of Distributed Sensor Networks, 2021
Partial discharges are the major cause of deterioration in the insulation characteristics of switchgears. Therefore, timely detection of partial discharge in switchgear and potential insulation faults is an urgent problem that needs to be addressed in ...
Jiajia Song, Jinbo Zhang, Xinnan Fan
doaj   +1 more source

Numerical Investigations on Temperature Distribution and Evolution of Cavitation Bubble Collapsed Near Solid Wall

open access: yesFrontiers in Energy Research, 2022
The internal temperature distribution and evolution in cavitation bubble can be investigated numerically by a thermal lattice Boltzmann method. The simulation results are consistent with the calculational results of the Rayleigh-Plesset equation and the ...
Minglei Shan   +5 more
doaj   +1 more source

Short-Term Load Forecasting Based on Deep Learning Bidirectional LSTM Neural Network

open access: yesApplied Sciences, 2021
Accurate load forecasting guarantees the stable and economic operation of power systems. With the increasing integration of distributed generations and electrical vehicles, the variability and randomness characteristics of individual loads and the ...
Changchun Cai   +3 more
doaj   +1 more source

High-Frequency Current Ripple Sample Anti-Aliasing Strategy of Digitally Controlled Converter Based on Notch Filter

open access: yesIEEE Access, 2023
The digital controller of the grid-connected converter achieves closed-loop control by sampling key voltage and current signals. High-frequency switching of power electronic switches introduces high-frequency ripples into the signals, which may cause ...
Ma Chunyan   +4 more
doaj   +1 more source

A two-stage optimization method for unmanned aerial vehicle inspection of an oil and gas pipeline network

open access: yesPetroleum Science, 2019
Oil and gas pipeline networks are a key link in the coordinated development of oil and gas both upstream and downstream. To improve the reliability and safety of the oil and gas pipeline network, inspections are implemented to minimize the risk of ...
Yamin Yan   +6 more
doaj   +1 more source

Dynamic Equivalent Modeling of a Grid-Tied Microgrid Based on Characteristic Model and Measurement Data

open access: yesEnergies, 2017
Microgrids can significantly improve the utilization of distributed generation (DG) and the reliability of the power supply. However, in the grid-tied operational mode, the interaction between the microgrid and the distribution network cannot be ignored.
Changchun Cai   +5 more
doaj   +1 more source

An MILP approach for detailed scheduling of oil depots along a multi-product pipeline

open access: yesPetroleum Science, 2017
Oil depots along products pipelines are important components of the pipeline transportation system and down-stream markets. The operating costs of oil depots account for a large proportion of the total system’s operating costs.
Hao-Ran Zhang   +4 more
doaj   +1 more source

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