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Journal articles on the topic 'Numerical parameters extraction'

Author: Grafiati

Published: 14 March 2023

Last updated: 31 July 2025

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1

Liu, Jiajia, Jianliang Gao, Ming Yang, Dan Wang, and Liang Wang. "Numerical Simulation of Parameters Optimization for Goaf Gas Boreholes." Advances in Civil Engineering 2019 (January 10, 2019): 1–13. http://dx.doi.org/10.1155/2019/3891080.

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In view of the ground drilling of the N2206 working face in Shanxi Wangzhuang Coal Mine, the gas concentration is low and the extraction effect is not good. Fluent computational fluid dynamics software was used to simulate the ground extraction drilling position of the N2206 working face in the goaf (the distance from the top of the coal seam and the distance from the return to the wind). The numerical simulation results show that when the final hole of the ground extraction hole in the goaf is 16 m from the roof of the coal seam and the distance from the return air is 45 m, the extraction eff

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Zidan, Mahmoud N., Nicola Everitt, Tawfik Ismail, and Irene S. Fahim. "Organic Solar Cells Parameters Extraction and Characterization Techniques." Polymers 13, no. 19 (2021): 3224. http://dx.doi.org/10.3390/polym13193224.

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Organic photovoltaic research is continuing in order to improve the efficiency and stability of the products. Organic devices have recently demonstrated excellent efficiency, bringing them closer to the market. Understanding the relationship between the microscopic parameters of the device and the conditions under which it is prepared and operated is essential for improving performance at the device level. This review paper emphasizes the importance of the parameter extraction stage for organic solar cell investigations by offering various device models and extraction methodologies. In order t

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Bouchra, Benabdelkrim, and Benatillah Ali. "Comparison Study on Two Parameters Extraction Methods for Different PV Modules." Journal of Alternative and Renewable Energy Sources 5, no. 1 (2019): 26–36. https://doi.org/10.5281/zenodo.2635427.

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For modelling a photovoltaic module, it is necessary to calculate the basic parameters which control the current-voltage characteristic curves that are not provided by the manufacturer. A numerical methods are time consuming and require long term chronological data that are not available in most developing countries, an improved mathematical model has been formulated by combining expository and numerical techniques to defeat the confinements of existing strategies. The values of the required input parameters of the model have been calculated analytically. The expression of the output current o

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Freeborn, Todd J., Brent Maundy, and Ahmed Elwakil. "Numerical extraction of Cole-Cole impedance parameters from step response." Nonlinear Theory and Its Applications, IEICE 2, no. 4 (2011): 548–61. http://dx.doi.org/10.1587/nolta.2.548.

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Sun, Xueping, Rui Ma, Shun Zhou, et al. "Fast, Accurate and Full Extraction of Coupling-of-Modes Parameters by Finite Element Method." Crystals 12, no. 5 (2022): 706. http://dx.doi.org/10.3390/cryst12050706.

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This paper presents a new numerical approach for the full extraction of the coupling-of-modes (COM) parameters by stationary and eigenfrequency analyses in the finite element method (FEM). This is a fast method extracting from the results of static analysis and eigenfrequency analysis. It avoids the long calculation time of admittance frequency response analysis, which is commonly used in extracting COM parameters. In addition to the usual COM parameters (velocity, reflection coefficient, transduction coefficient and capacitance), the phases of reflection and transduction coefficient can be al

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Anani, Nader, and Haider Ibrahim. "Performance Evaluation of Analytical Methods for Parameters Extraction of Photovoltaic Generators." Energies 13, no. 18 (2020): 4825. http://dx.doi.org/10.3390/en13184825.

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This paper presents a succinct exploration of several analytical methods for extracting the parameters of the single-diode model (SDM) of a photovoltaic (PV) module under standard test conditions (STC). The paper investigates six methods and presents the detailed mathematical analysis leading to the development of each method. To evaluate the performance of these methods, MATLAB-based software has been devised and deployed to generate the results of each method when used to extract the SDM parameters of various PV test modules of different PV technologies. Similar software has also been develo

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Bouzzit, A., A. Arciniegas, L. Martinez, S. Serfaty, and N. Wilkie-Chancellier. "Material characterization by surface wave parameters extraction using 3D vibrometer and ellipsometry." Journal of Physics: Conference Series 2768, no. 1 (2024): 012001. http://dx.doi.org/10.1088/1742-6596/2768/1/012001.

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Abstract This work focuses on the monitoring of the 3D propagation of ultrasonic surface waves used in non-destructive testing and evaluation. The ellipticity of the movement related to the Rayleigh wave, specifically the H/V parameter, is studied analytically, numerically, and experimentally on an aluminum block. The study involves generating signals from the theoretical harmonic expression of particle displacement issued from Rayleigh wave, carrying out numerical simulations using a finite element method, and generating the Rayleigh wave using a shear contact transducer with a 1 MHz central

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Salame, C. T. "Extraction of RDS(ON)of n-Channel Power MOSFET by Numerical Simulation Model." Active and Passive Electronic Components 23, no. 4 (2001): 175–83. http://dx.doi.org/10.1155/apec.23.175.

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In this paper we present an original method for n-channel power MOSFET resistance extraction in the operation mode (RDS(ON)). The IDS=f(VDS) electrical characteristics measurements for the transistor and the Body-Drain junction are realized for the experimental determination and the extraction (by numerical analysis) of RDS(ON), respectively. Values of this resistance are extracted for different positive bias applied between the gate and the source (+VGS). Physicals parameters obtained from the numerical analysis are inspected, and results shows that the numerically analysed junction character

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Patel, Sanjaykumar J. "Solar Cell Parameters Extraction Using Rao-3 algorithm." International Scientific Journal of Engineering and Management 04, no. 06 (2025): 1–9. https://doi.org/10.55041/isjem04689.

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The extraction of solar cell parameters is a subject of significant interest, as it plays a crucial role in predicting the performance and behavior of solar cells, as well as in evaluating their efficiency. This paper presents a simple, efficient, and reliable metaheuristic optimization technique, i.e. the Rao-3 algorithm, for extracting five key electrical parameters of a solar cell from a single illuminated current–voltage (I–V) characteristic. An interactive numerical simulation has been developed using LabVIEW as the programming platform to implement the algorithm. The consistency and accu

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Benahmida, Abdelaaziz, Noureddine Maouhoub, and Hassan Sahsah. "Numerical approach for extraction of photovoltaic generator single-diode model parameters." Computer Science and Information Technologies 2, no. 2 (2021): 58–66. http://dx.doi.org/10.11591/csit.v2i2.p58-66.

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In this work, a numerical approach has been proposed to estimate the five single-diode circuit model physical parameters of photovoltaic generators from their experimental current-voltage characteristics. Linear least square method has been used to solve the system of three linear equations to express the shunt resistance, the saturation current and the photocurrent as a function of the series resistance and the ideality factor. Two key points have been used to solve the system of two nonlinear equations to extract values of series resistance and ideality factor. The advantage of the proposed

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Abdelaaziz Benahmida, Noureddine Maouhoub, and Hassan Sahsah. "Numerical approach for extraction of photovoltaic generator single-diode model parameters." Computer Science and Information Technologies 2, no. 2 (2021): 58–66. http://dx.doi.org/10.11591/csit.v2i2.pp58-66.

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In this work, a numerical approach has been proposed to estimate the five single-diode circuit model physical parameters of photovoltaic generators from their experimental current-voltage characteristics. Linear least square method has been used to solve the system of three linear equations to express the shunt resistance, the saturation current and the photocurrent as a function of the series resistance and the ideality factor. Two key points have been used to solve the system of two nonlinear equations to extract values of series resistance and ideality factor. The advantage of the proposed

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Abdelaaziz, Benahmida, Maouhoub Noureddine, and Sahsah Hassan. "Numerical approach for extraction of photovoltaic generator single-diode model parameters." Computer Science and Information Technologies 2, no. 2 (2021): 58–66. https://doi.org/10.11591/csit.v2i2.p58-66.

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In this work, a numerical approach has been proposed to estimate the five single-diode circuit model physical parameters of photovoltaic generators from their experimental current-voltage characteristics. Linear least square method has been used to solve the system of three linear equations to express the shunt resistance, the saturation current and the photocurrent as a function of the series resistance and the ideality factor. Two key points have been used to solve the system of two nonlinear equations to extract values of series resistance and ideality factor. The advantage of the proposed

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Singh, Surya Prakash, Nilesh K. Tiwari, and M. Jaleel Akhtar. "Nondestructive Extraction of Parameters of Multilayered Media Using Terahertz Pulse Technique." Frequenz 73, no. 1-2 (2019): 63–70. http://dx.doi.org/10.1515/freq-2018-0057.

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Abstract In this work, an efficient non-invasive terahertz pulse technique is proposed and investigated to determine the thickness and refractive index of each layer in an optically thick stratified media. A closed form formulations are derived for simultaneous extraction of the thickness and complex refractive index of each layer with the help of primary reflected signals from the multilayered structure. The proposed technique is numerically tested using a full wave electromagnetic simulator and is experimental verified in the millimeter wave frequency range by utilizing the power peaks corre

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Wesolowski, Miroslaw, Mariusz Ruchwa, Eduards Skukis, and Andrejs Kovalovs. "Numerical and Experimental Extraction of Dynamic Parameters for Pyramidal Truss Core Sandwich Beams with Laminated Face Sheets." Materials 13, no. 22 (2020): 5199. http://dx.doi.org/10.3390/ma13225199.

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Sandwich beams that are composed of laminated face sheets and aluminum pyramidal truss cores are considered to be essential elements of building and aerospace structures. In this paper, a methodology for the experimental and numerical analysis of such structures is presented in order to support their industrial application. The scope of the present research covers both the experimental and numerical extraction of the dynamic parameters of the sandwich beams. Vibration tests are performed while using an optical system for three-dimensional vibrations sensing. The in-plane and out-of-plane vibra

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Yin, Yongming, Dacang Wang, Quanjie Zhu, et al. "Research on Intelligent Design and Visualization of Gas Extraction Drilling Based on PSO–LSTM." Processes 12, no. 8 (2024): 1691. http://dx.doi.org/10.3390/pr12081691.

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Under the background of intelligent construction of coal mines, gas extraction design is still based on manual design, which is complex, time–consuming, and error–prone, and its automation degree needs to be improved. In order to solve this problem, taking the 1302 working face of a mine in Shanxi Province as the research object, this paper carried out relevant research. Firstly, the influencing factors of gas extraction were determined, and the influence rules of different parameters on the extraction effect were studied by numerical simulation. Secondly, an intelligent optimization method of

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Rodrigues, Michele, Victor Sonnenberg, and João Antonio Martino. "Parameters Extraction from C-V Curves in Triple-Gate FinFET." Journal of Integrated Circuits and Systems 3, no. 2 (2008): 77–81. http://dx.doi.org/10.29292/jics.v3i2.285.

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Methods to determine the effective oxide thickness (EOT), fin height (Hfin) and fin doping concentration (Nfin) through gate to drain/source capacitance as a function of the front and the back gate voltage curves in triple-gate nMOS FinFET are presented. The proposed methods were validated through three-dimensional numerical simulations and experimental measurements showing that these methods can be also applied in triple-gate nMOS FinFET devices as a powerful tool for experimental validation.

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De Oliveira, Naila Albertina, and Jose Antonio Rabi. "CONTINUOUS-FLOW EXTRACTION OF BIOCOMPOUNDS IN FIXED BED: INFLUENCE OF SWAPPING FROM DIRICHLET TO DANCKWERTS CONDITION AT INLET IN PHENOMENOLOGICAL MODELS." Revista Brasileira de Engenharia de Biossistemas 15, no. 4 (2021): 538–60. http://dx.doi.org/10.18011/bioeng2021v15n4p538-560.

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Phenomenological models have increasingly become vital to bioprocess engineering. In continuous-flow biocompounds extraction models, diffusion requires an extra boundary condition at exit (usually null Neumann condition) while either Dirichlet or Danckwerts condition can be imposed at inlet. By taking an extant case study and with the help of an in-house lattice-Boltzmann simulator, this work numerically examines prospective effects of interchanging aforesaid inlet conditions. Trial simulations were performed for scenarios ranging from convective-dominant to diffusive-dominant. Extraction yiel

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18

Zhang, Fengyan, and Haidong Wang. "Optimization of Drilling Parameters in Influence Area of Gas–Solid Interaction during Parallel Drilling Hole." Processes 11, no. 8 (2023): 2371. http://dx.doi.org/10.3390/pr11082371.

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Previous studies have established that the selection of gas extraction borehole parameters is crucial for the effectiveness of gas extraction. To more accurately determine the reasonable extraction radius of gas extraction boreholes in the coal seam, this study was based on the actual occurrence conditions of the coal body. A coal-seam gas-seepage model, considering dynamic changes in permeability under gas–solid coupling conditions, was constructed. It was combined with FLAC3D numerical simulations to develop a borehole extraction model closer to the field’s natural needs. The study revealed

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Hong, Shunjun, Yuanwen Li, Xiaozhou Hu, et al. "Effects of Different Solid–Liquid Parameters on Flow Characteristics and Performance Output of Mineral Extraction Pumps: Analysis and Experimental Validation." Journal of Marine Science and Engineering 13, no. 7 (2025): 1218. https://doi.org/10.3390/jmse13071218.

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It is essential to investigate the performance output and flow characteristics within deep-sea mineral extraction pumps using appropriate numerical calculation methods. In this study, by taking a deep-sea mineral extraction pump prototype as the subject, a small-scale mineral extraction pump model was constructed. Computational fluid dynamics methods, incorporating the SSTk-ω turbulence model and the discrete phase model, were utilized to systematically investigate the pressure distribution, velocity field, streamline patterns, and performance characteristics of the mineral extraction pump und

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Chen, Xuexi, Xinyu Ma, Jiaying Hu, et al. "Combined Effect of Multiple Slotting Spatial Parameters on Gas Extraction Efficiency: Numerical Analysis and Field Verification." Processes 12, no. 11 (2024): 2482. http://dx.doi.org/10.3390/pr12112482.

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Hydraulic slotting is an effective technology that enhances gas extraction operations and prevents gas disasters in coal mines. Slotting parameters and spatial arrangements substantially affect permeability enhancements. The pressure-release range and effective extraction area under different slotting spatial parameters were obtained by constructing a hydraulic slotting pressure-release permeability and three-dimensional (3D) slotting numerical models. These models quantitatively characterized the influence rules of multiple slotting spatial arrangement parameters on the extraction efficiency

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Rahnema, Milad, Hamed Rahnema, Marcia D. Mcmillan, Ali Reza Edrisi, and Hamid Rahnema. "Numerical Study of Single Well Vapor Extraction Process." Journal of Petroleum Engineering 2016 (November 8, 2016): 1–9. http://dx.doi.org/10.1155/2016/8925190.

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Vapor extraction (Vapex) is an emerging technology to produce heavy oil and bitumen from subsurface formations. Single well (SW) Vapex technique uses the same concept of Vapex process but only with one horizontal well. In this process solvent is injected from the toe of the horizontal well with oil production at the heel section. The main advantage of SW-Vapex process lies in the economic saving and applicability in problematic reservoirs, where drilling of two horizontal wells is impractical. The performance of SW-Vapex seems to be comparable with dual horizontal Vapex process using proper op

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Zhang, Xiaoqiang, Fengyuan Zhou, and Jiaxing Zou. "Numerical Simulation of Gas Extraction in Coal Seam Strengthened by Static Blasting." Sustainability 14, no. 19 (2022): 12484. http://dx.doi.org/10.3390/su141912484.

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For mines with low permeability and high gas emissions, static blasting technology is used to pre-split the coal seam to increase the permeability and strengthen the gas extraction, which will significantly reduce the occurrence of gas accidents in mines. Taking Wangjialing Coal Mine as the research object, the mathematical model of fluid-solid is established. The numerical simulation software COMSOL is used to simulate the established mathematical model. Simultaneously, the factors affecting the efficiency of static blasting gas extraction are analyzed by adjusting the parameters. The results

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Li, Wenchao, Viet-Hung Vu, Zhaoheng Liu, Marc Thomas, and Bruce Hazel. "Extraction of modal parameters for identification of time-varying systems using data-driven stochastic subspace identification." Journal of Vibration and Control 24, no. 20 (2017): 4781–96. http://dx.doi.org/10.1177/1077546317734670.

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This paper presents a method for the extraction of modal parameters for identification of time-varying systems using Data-Driven Stochastic Subspace Identification (SSI-DATA). In practical applications of SSI-DATA, both the modal parameters and computational ones are mixed together in the identified results. In order to differentiate the structural ones from computational ones, a new method based on the eigen-decomposition of the state matrix constructed in SSI-DATA is proposed. The efficiency of the proposed method is demonstrated through numerical simulation of a lumped-mass system and exper

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Zhang, Dangyu, Minbo Zhang, Shilong Zhang, Zichao Wang, Yan Jin, and Rentao Liu. "Numerical Simulation of Effective Extraction Radius of Pre-Drainage Borehole Based on Coal Damage Model." Sustainability 15, no. 5 (2023): 4446. http://dx.doi.org/10.3390/su15054446.

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Borehole pre-drainage is an important technical means to control a coal mine gas disaster. In order to determine the optimal pre-drainage parameters of Dashucun mine, a coal damage permeability evolution model was established based on coal damage deformation, considering gas adsorption and desorption and the Klinkenberg effect, and a damage fluid-structure coupling model of coal seam containing gas was established by combining the coal seam deformation equation and the mass conservation equation. COMSOL software was used to simulate the influence of factors such as the initial permeability of

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Tilley, Nele, and Bart Merci. "Numerical study of smoke extraction for adhered spill plumes in atria: Impact of extraction rate and geometrical parameters." Fire Safety Journal 55 (January 2013): 106–15. http://dx.doi.org/10.1016/j.firesaf.2012.10.022.

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Lekić Brettschneider, Amalia, and Luka Perković. "NUMERICAL ANALYSIS OF BOREHOLE HEAT EXCHANGER PERFORMANCE IN SHALLOW GRAVEL AQUIFERS AND CLAY-DOMINATED SOIL." Rudarsko-geološko-naftni zbornik 39, no. 2 (2024): 75–84. http://dx.doi.org/10.17794/rgn.2024.2.6.

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The performance of geothermal heat extraction in shallow aquifers depends on both Borehole Heat Exchanger (BHE) and soil or aquifer properties. In this work, an analysis of the thermal yield of a shallow geothermal reservoir was made numerically with the finite element method used to simulate heat and mass transfer in the three-dimensional reservoir. The main parameters for analysis which have been considered are the geometry and physical parameters of the BHE and grout, as well as aquifer matrix and groundwater fluid. Physical parameters are thermal conductivity, flow conductivity, expansion

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Palmei Gaibimei, Owais Yousuf, Anupama Singh, and Iftikhar Alam. "Optimization of microwave assisted extraction parameters of betalains pigment from Celosia argentea var. cristata using box behnken design." Agricultural Engineering Today 46, no. 1 (2025): 1–7. https://doi.org/10.52151/aet2022461.1546.

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The use of effective extraction technique would be beneficial for degrading the cell wall leading to efficient leaching out of pigments with less degradation of pigments. The pigment extracted using this technique will be use as a replacement of synthetic colorant in food industry and pharmaceutical. The main objectives are to extract betalains pigment, study the effect of extraction parameters on response and optimization of parameters for pigment production. In microwave assisted extraction of betalains pigment, parameters such as microwave power of 80, 160 and 240 W, treatment periods of 30

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Zhao, Youxin, Qingjie Qi, Xinlei Jia, Yingjie Liu, and Jingwen Zhang. "Numerical Simulation of Coal Spontaneous Combustion around a Borehole Induced by Negative Pressure Gas Drainage." Geofluids 2021 (August 7, 2021): 1–11. http://dx.doi.org/10.1155/2021/3938243.

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The suction negative pressure is an important factor affecting the spontaneous combustion of coal around a borehole. Because the mechanism of suction negative pressure in the gas extraction process remains unclear, a constant suction negative pressure is often used in coal mines, leading to a low efficiency of gas extraction in deep coal seams. Moreover, the coal body easily undergoes spontaneous combustion during the extraction process, which is not conducive to safe mining. To study the effect of the suction negative pressure near the end sealing section, a numerical model of the combustion

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Bloot, Rodrigo, Tiago A. Coimbra, Jorge H. Faccipieri, and Martin Tygel. "Common-reflection-surface method in weakly anisotropic vertical transverse isotropic media." GEOPHYSICS 83, no. 3 (2018): C99—C113. http://dx.doi.org/10.1190/geo2017-0368.1.

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The extraction of kinematic parameters from wave propagation through traveltimes is one of the great challenges in seismic data processing. In this context, we modify the common-reflection-surface (CRS) traveltime to improve its accuracy and also interpret its parameters via paraxial ray theory in an anisotropic medium obtaining information about the wavefront curvatures measured at surface. The proposed method consists of searching for the best stacking parameters that fit the data set followed by the extraction of kinematic information from the measured waves. Numerical tests show the effect

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Lipnitskaya, S. N., I. I. Dudko, and I. G. Smirnova. "Numerical Simulation of Light Extraction from Remote Phosphor LED." Reviews on Advanced Materials and Technologies 4, no. 3 (2022): 35–41. http://dx.doi.org/10.17586/2687-0568-2022-4-3-35-41.

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In this paper, light extraction from remote phosphor LEDs were calculated in Zemax OpticStudio. The dependence of the optical characteristics of the remote phosphor LED on the parameters of phosphor and its geometrical form was considered. In case of a thin plate as a remote phosphor, phosphor particle size, phosphor mass fraction and phosphor plate thickness were carefully analyzed. Furthermore, a plane-convex lens and Fresnel lens were also considered as geometrical form of remote phosphor. The simulation results show that color coordinates of LED, using remote phosphor plate (thickness 0.25

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CAI, J. H., N. SATOH, M. YANAGIDA, and L. Y. HAN. "SUCCESSIVE LARGE PERTURBATION METHOD FOR THE EXTRACTION OF MORE ACCURATE EQUIVALENT-CIRCUIT-PARAMETERS IN SOLAR CELLS." Journal of Nonlinear Optical Physics & Materials 19, no. 04 (2010): 637–43. http://dx.doi.org/10.1142/s0218863510005558.

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The numerical least-square fitting is a general method for the extraction of model parameter from experimental data. However, the method suffers from an initial value dependence problem when the method is used in I - V curve fitting. Recently we have proposed a successive large perturbation method (SLPM) to eliminate the initial value dependence problem. In this paper, we test the SLPM by comparing our results with previous published fitting results for various solar cells, such as traditional silicon solar cells and new type of organic solar cells and dye-sensitized solar cells. The method is

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Rudenko, Tamara, Sylvain Barraud, Yordan M. Georgiev, Vladimir Lysenko, and Alexei N. Nazarov. "Electrical Characterization and Parameter Extraction of Junctionless Nanowire Transistors." Journal of Nano Research 39 (February 2016): 17–33. http://dx.doi.org/10.4028/www.scientific.net/jnanor.39.17.

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This article presents a review of various methods for extracting the key parameters of junctionless (JL) MOSFETs, namely, the threshold voltage, flat-band voltage, doping concentration, carrier mobility, and parasitic series resistance. The applicability and limitations of different methods are analyzed using numerical simulations and experimental data for planar and tri-gate nanowire JL transistors with various nanowire widths.

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Crossland, Tom, Pontus Stenetorp, Daisuke Kawata, et al. "Toward Machine-learning-based Metastudies: Applications to Cosmological Parameters." Astrophysical Journal Supplement Series 269, no. 2 (2023): 34. http://dx.doi.org/10.3847/1538-4365/acf76a.

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Abstract We develop a new model for automatic extraction of reported measurement values from the astrophysical literature, utilizing modern natural language processing techniques. We use this model to extract measurements present in the abstracts of the approximately 248,000 astrophysics articles from the arXiv repository, yielding a database containing over 231,000 astrophysical numerical measurements. Furthermore, we present an online interface (Numerical Atlas) to allow users to query and explore this database, based on parameter names and symbolic representations, and download the resultin

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Herbazi, Rachid, Khalid Amechnoue, and Adil Chahboun. "Enhancement of Electrical Parameter Extraction from Solar Cells Using a Hybrid Genetic Algorithm with the Levenberg-Marquardt Method." E3S Web of Conferences 601 (2025): 00053. https://doi.org/10.1051/e3sconf/202560100053.

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Accurate modeling and simulation of solar photovoltaic (PV) systems are critical for optimizing their performance and efficiency. This requires precise determination of electrical parameters of solar cells, such as photocurrent (Iph), saturation current (I0), series resistance (Rs), shunt resistance (Rsh), and ideality factor (n). Traditional numerical methods for parameter extraction often face limitations in complexity, speed, and assumption dependencies. To address these issues, this study proposes a hybrid method that combines a genetic algorithm with the Levenberg-Marquardt algorithm (GAL

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Ibáñez, María José, Domingo Barrera, David Maldonado, Rafael Yáñez, and Juan Bautista Roldán. "Non-Uniform Spline Quasi-Interpolation to Extract the Series Resistance in Resistive Switching Memristors for Compact Modeling Purposes." Mathematics 9, no. 17 (2021): 2159. http://dx.doi.org/10.3390/math9172159.

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An advanced new methodology is presented to improve parameter extraction in resistive memories. The series resistance and some other parameters in resistive memories are obtained, making use of a two-stage algorithm, where the second one is based on quasi-interpolation on non-uniform partitions. The use of this latter advanced mathematical technique provides a numerically robust procedure, and in this manuscript, we focus on it. The series resistance, an essential parameter to characterize the circuit operation of resistive memories, is extracted from experimental curves measured in devices ba

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Nguyen Dang Binh, Thanh, Dung Nguyen Trung, and Duc Hong Ta. "MODELING OF ESSENTIAL OIL EXTRACTION PROCESS: APPLICATION FOR ORANGE, POMELO, AND LEMONGRASS." Vietnam Journal of Science and Technology 56, no. 4A (2018): 182. http://dx.doi.org/10.15625/2525-2518/56/4a/12811.

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ABSTRACT - HCTN - 44In this study, the kinetic models of steam distillation of orange (Citrus Sinensis (L.) Osbeck), pomelo (Citrus grandis L.), and lemongrass (Cymbopogon Citratus) for the recovery of essential oils were developed. The model parameters were estimated based on experimental data and comprehensive kinetic mechanisms of the solid-liquid extraction process. Numerical results showed that, the extraction mechanism of the three materials were best fit to the Patricelli two-stage model in which the diffusion of the oil was followed by the washing step. Moreover, the model parameters o

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Wang, Yu-Lu, Wei Jiang, and Yong-Hui Xie. "Numerical study into the effects of effective angle of attack motions on energy extraction performance of parallel foils." Thermal Science 22, Suppl. 2 (2018): 371–81. http://dx.doi.org/10.2298/tsci170731249w.

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The effects of different effective angle of attack motions on flapping foil are considered. Energy extraction characteristics of parallel foils with combined plunging and pitching motions at multiple working conditions are systematically analyzed. The energy extraction processes of dual foil at different effective angle of attack motions and reduced frequencies are simulated, respectively. In the range of parameters discussed in this paper, the increase of Ke improves the energy extraction performance of foil effectively. Every effective angle of attack motion has a frequency which can obtain

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Hao, Tianxuan, Lizhen Zhao, Yang Du, et al. "Reduced-Order Model of Coal Seam Gas Extraction Pressure Distribution Based on Deep Neural Networks and Convolutional Autoencoders." Information 15, no. 11 (2024): 733. http://dx.doi.org/10.3390/info15110733.

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There has been extensive research on the partial differential equations governing the theory of gas flow in coal mines. However, the traditional Proper Orthogonal Decomposition–Radial Basis Function (POD-RBF) reduced-order algorithm requires significant computational resources and is inefficient when calculating high-dimensional data for coal mine gas pressure fields. To achieve the rapid computation of gas extraction pressure fields, this paper proposes a model reduction method based on deep neural networks (DNNs) and convolutional autoencoders (CAEs). The CAE is used to compress and reconstr

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Vlasov, S. F., and Ye V. Moldavanov. "Effect of geological and technological parameters on the convergence in a stope." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 6 (2021): 16–22. http://dx.doi.org/10.33271/nvngu/2021-6/016.

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Purpose. To study regularities in changes in convergence of wall rocks along a setting line of the powered props depending upon the sandstone availability within the roof, mining depth, as well as its position relative to the coal seam along the length of the extraction column based on the results of numerical experiments and forecast probable zones of rigid settlement of the powered support units according to a longwall length at any moment of a stope arrangement along the extraction pillar in accordance with changes in geological and technological parameters. Methodology. The paper represent

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Sfiriac, Laura, Doru Stoianovici, Maria Stoicescu, Laurențiu Prodea, and Timur Chis. "Numerical modeling of the operation of oil wells in deep pumping." International Journal of Engineering and Science Invention 13, no. 8 (2024): 43–49. http://dx.doi.org/10.35629/6734-13084349.

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The design and modeling of deep pumping wells are essential to ensuring the efficiency and sustainability of crude oil extraction operations. These processes are fundamental to optimizing operational parameters, reducing costs, and preventing mechanical problems that could lead to costly downtime. In the context of the continuous increase in global energy demand, the oil industry faces increasing challenges related to the exploration and exploitation of hydrocarbon deposits. To meet these challenges, engineers and operators in the field rely on advanced modeling and simulation technologies tha

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Jaber, Ahmed Shawki, Mimoon Ismael, Taha Rashid, Mohammed Abdulhadi Sarhan, Mohammed Rasheed, and Ilaf Mohamed Sala. "Comparesion the electrical parameters of photovoltaic cell using numerical methods." EUREKA: Physics and Engineering, no. 4 (July 27, 2023): 29–39. http://dx.doi.org/10.21303/2461-4262.2023.002770.

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For a research problem: as a single-diode model (electrical circuit) is difficult to discover the precise answer to employing analytical approaches, develop and compute the electrical parameters of the PV cell roughly using numerical algorithms. Therefore, the goal of this work is to create an algorithm that aids in the approximate solution of the electrical parameters of solar cells. Three methods have been proposed for these calculations, each of which has a quicker calculation time and a higher level of accuracy. By streamlining the calculation process, the proposed method solves the

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Simeonov, Evgeni, Zvezdelina Yaneva, and Chavdar Chilev. "Extraction of Protodioscin from Tribulus terrestris-Optimisation of Kinetics and Modeling." Revista de Chimie 71, no. 12 (2021): 56–66. http://dx.doi.org/10.37358/rc.20.12.8386.

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The aim of the present study was to establish the optimal conditions for protodioscin extraction from Tribulus terrestris plant and to investigate the possibilities of mathematical modeling of the process and calculation of the diffusion coefficients essential for the industrial scale-up and management of the extraction process. The kinetics of protodioscin extraction from Tribulus terrestris was experimentally studied at varying the solvent type (70% and 96% ethanol) and temperature (20�C, 30�C, 40�C). The optimal process conditions for these parameters were determined. The experimental resul

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Wang, Wei, Zongxiang Li, Guangmin Zhao, and Yujin Chen. "Coal and Gas Comining in the High-Gas Detong Mine, China: Analytical and Numerical Parameter Optimization of Gas Extraction Boreholes." Advances in Civil Engineering 2022 (March 4, 2022): 1–12. http://dx.doi.org/10.1155/2022/9552620.

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The upper corner gas overrun caused by goaf gas gushing in the high-gas mine can be mitigated by roof positioning of long boreholes in the goaf fracture zone, creating an artificial gas migration channel and achieving safe comining of coal and gas. This study numerically simulated the fracture evolution in the coal rock overlying goaf in workface #2-104 of the Detong Mine, China. Using the O-shaped circle theory and the FLAC3D commercial software package, the range parameters of goaf fracture zone gas-concentrated areas were obtained by defining the pressure relief coefficient, which provided

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Fu, Qiang, Mingqiang Chen, Weixin Pang, and Lirong Dong. "Numerical Simulation of Natural Gas Hydrate Depressurization Extraction Considering Phase Transition Characteristics." Journal of Marine Science and Engineering 13, no. 3 (2025): 511. https://doi.org/10.3390/jmse13030511.

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Natural gas hydrate (NGH) is a clean resource characterized by abundant potential reserves, clean combustion, and high energy density. Although significant progress has been made in the development of NGH resources all around the world, challenges still exist that hinder commercial exploitation, such as a low daily gas production rate and short steady production periods. One significant reason lies in the complex gas–liquid–solid phase transitions occurring within the formation during production, which lead to changes in flow capacity. Understanding the phase change mechanism of NGH reservoirs

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Azzopardi, S., M. Trivedi, C. Zardini, and K. Shenai. "Non-destructive extraction of technological parameters for numerical simulation of conventional planar punch-through IGBT." Solid-State Electronics 44, no. 11 (2000): 1899–908. http://dx.doi.org/10.1016/s0038-1101(00)00184-2.

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Sandrolini, L., M. Artioli, and U. Reggiani. "Numerical method for the extraction of photovoltaic module double-diode model parameters through cluster analysis." Applied Energy 87, no. 2 (2010): 442–51. http://dx.doi.org/10.1016/j.apenergy.2009.07.022.

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Bechtold, T., D. Hohlfeld, E. B. Rudnyi, and M. Günther. "Efficient extraction of thin-film thermal parameters from numerical models via parametric model order reduction." Journal of Micromechanics and Microengineering 20, no. 4 (2010): 045030. http://dx.doi.org/10.1088/0960-1317/20/4/045030.

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Ryazantsev, D. V., and V. P. Grudtsov. "Automatic Parameter Extraction Technique for MOS Structures by C-V Characterization Including the Effects of Interface States." Measurement Science Review 16, no. 5 (2016): 266–72. http://dx.doi.org/10.1515/msr-2016-0033.

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Abstract An automatic MOS structure parameter extraction algorithm accounting for quantum effects has been developed and applied in the semiconductor device analyzer Agilent B1500A. Parameter extraction is based on matching the experimental C-V data with numerical modeling results. The algorithm is used to extract the parameters of test MOS structures with ultrathin gate dielectrics. The applicability of the algorithm for the determination of distribution function of DOS and finding the donor defect level in silicon is shown.

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Pinzaru, Valerian, Carmen Bujoreanu, and Olivier Barat. "Structural Damping Analysis of a Vehicle Front Hood: Experimental Modal Parameters Extraction and Simulation Correlation." Machines 12, no. 12 (2024): 862. http://dx.doi.org/10.3390/machines12120862.

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Structural damping is a type of energy dissipation that occurs within the structure of a mechanical system. Unlike other forms of damping that rely on external devices or materials, structural damping is intrinsic to the construction and assembly of the structure itself. This study focuses on the experimental determination of the structural damping ratios for a vehicle front hood fabricated from steel, with the main objective being to accurately identify these damping characteristics. To achieve this, the modal parameter extraction process utilized both the Least Squares Complex Exponential (L

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Xu, Songyuan, Jiwon Heo, Chan-Soo Lee, Ki-Hong Kim, and Bierng-Chearl Ahn. "THRU–REFLECT Method for Scattering Parameter Extraction from Back-to-Back Measurements of Waveguide Components." Sensors 25, no. 7 (2025): 2277. https://doi.org/10.3390/s25072277.

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The design of new waveguide components is often verified by back-to-back measurements of two identically fabricated units without extracting the characteristics of a single device. This paper presents a simple method of extracting the scattering parameters of waveguide components from back-to-back measurements. The proposed method requires only three waveguide mating connections: one for reflection measurement with an offset SHORT and two for transmission measurement with a THRU configuration. A singular condition in the S-parameter extraction equations is derived, and the optimum length of an

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