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RESEARCH ON GPS HEIGHT FITTING BASED ON ABC OPTIMIZED LSSVM [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
Aiming at the problem that the fitting parameters of the least squares support vector machine fitting method are difficult to select, a method of introducing the artificial bee colony algorithm into the least squares support vector machine to establish a
Y. Zhang   +6 more
doaj   +1 more source

Wave Energy Converter’s Slack and Stiff Connection: Study of Absorbed Power in Irregular Waves

open access: yesEnergies, 2021
Two different concepts of wave energy converter coupled to the novel C-GEN linear generator have been studied numerically, including the evaluation of different buoy sizes.
Tatiana Potapenko   +3 more
doaj   +1 more source

Dielectric Response Model for Transformer Insulation Using Frequency Domain Spectroscopy and Vector Fitting

open access: yesEnergies, 2022
This paper proposes a rational approximation-based approach to find positive real parameters for the extended Debye model (EDM), aimed at condition assessment of insulation systems of power transformers.
Giovanni Hernandez, Abner Ramirez
doaj   +1 more source

Using the Exact Equivalent π-Circuit of Transmission Lines for Electromagnetic Transient Simulations in the Time Domain

open access: yesIEEE Access, 2022
This work presents a transmission line model for simulating electromagnetic transients directly in the time domain. For this purpose, the exact equivalent $\pi $ -circuit is used, which represents the line taking into account its distributed and ...
P. Juan Robles Balestero   +2 more
doaj   +1 more source

A Novel Method for Constructing VLC Equalizer With Active-Passive Hybrid Network

open access: yesIEEE Photonics Journal, 2020
In this article, a novel method for constructing a pre-equalizer by optimized filter synthesis with vector fitting is proposed to broaden the bandwidth of a visible light communication (VLC) system.
Chengyu Min   +6 more
doaj   +1 more source

Handling Initial Conditions in Vector Fitting for Real Time Modeling of Power System Dynamics

open access: yesEnergies, 2021
This paper develops a predictive modeling algorithm, denoted as Real-Time Vector Fitting (RTVF), which is capable of approximating the real-time linearized dynamics of multi-input multi-output (MIMO) dynamical systems via rational transfer function ...
Tommaso Bradde   +4 more
doaj   +1 more source

Macromodeling High-Speed Circuit Data Using Rational Krylov Fitting Method

open access: yesEnergies, 2021
This paper presents the modeling of high speed distributed networks characterized by S-parameters frequency data using the rational Krylov fitting (RKFIT) algorithm. Numerical examples illustrate the effectiveness of the method to compute stable rational
Mohamed Sahouli, Anestis Dounavis
doaj   +1 more source

Effective Simulation Approach for Lightning Impulse Voltage Tests of Reactor and Transformer Windings

open access: yesEnergies, 2020
In this paper, an effective simulation method for lightning impulse voltage tests of reactor and transformer windings is presented. The method is started from the determination of the realized equivalent circuit of the considered winding in the wide ...
Piyapon Tuethong   +2 more
doaj   +1 more source

Impedance modeling of DC grid considering the frequency-dependent characteristics of cable and overhead line parameters

open access: yes电力工程技术, 2022
The fault characteristics of direct current (DC) grids can be analyzed by addressing the grid damping characteristics. However,the frequency-dependent characteristics of the transmission line parameters are usually ignored in the conventional grid ...
CHEN Siwei   +5 more
doaj   +1 more source

Risk Analysis of HPEM Threats for Linear RF Channel with Pyramid Horn Antenna Based on System-Level SPICE Modeling

open access: yesEnergies, 2022
High power electromagnetics (HPEMs) pose a potential threatening risk to the wireless communication system, especially according to the main coupling path of the RF front-end channel.
Chuanbao Du   +6 more
doaj   +1 more source

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