Showing 521 - 540 results of 1,109 for search 'variations model composition', query time: 0.13s Refine Results
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    Parametric analysis of straw wad destroyer by Yury Ivanovich Yermolyev, Artem Alexandrovich Doroshenko, Igor Аlexandrovich Ivashchenko, Roman Evgenyevich Fomenko

    Published 2015-06-01
    “…The work objective is the detection of regularities for straw wad destruction under the geometric and kinematic parameter variation of the gear for wad breaking. The research objective is the impact assessment of the geometric parameters, composition and kinematics of the straw wad destroyer on its performance indices. …”
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  4. 524

    Prediction of subway shield construction parameters based on multi-layer perceptron by LI Wenqian, WU Yunhuan, WU Jingye, CHEN Zhihuai, XIE Senlin, HU Anfeng

    Published 2024-01-01
    “…Shield construction technology has been widely used in subway construction, and reasonable prediction of shield tunneling parameters is of great practical significance for improving construction safety and reducing operational difficulties.Taking a section of the Hangzhou Airport Express Underpass Tunnel as the engineering background, this study uses the friction angle, cohesion force, compression modulus and heaviness of the soil layer within the diameter of the tunnel as well as the burial depth of the tunnel cover, the preset blade speed and propulsion speed of the shield machine as inputs, and the slurry volume, slurry pressure, soil discharge volume, total thrust force and blade torque during the shield construction as outputs, and establishes a prediction model of shield tunneling parameters based on a multi-layer perceptron.By comparing the predictive performance of the model under different combinations of hyper-parameters on the dataset, a suitable shield construction parameter prediction model is selected for the project.The model predictive effect is verified using the measured data, and the predicted values are consistent with the overall variation pattern of the measured data, with an average error within 20%.The established multi-layer perceptron model provides reasonable predictions with good accuracy and can be applied to predict shield tunneling parameters under the conditions of composite strata.…”
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  5. 525

    Analysis of Ionospheric Disturbances in China During the December 2023 Geomagnetic Storm Using Multi-Instrument Data by Jun Tang, Sheng Wang, Jintao Wang, Mingxian Hu, Chaoqian Xu

    Published 2025-05-01
    “…The Prophet time series forecasting model is employed to detect ionospheric anomalies. …”
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  6. 526

    Feasibility Study of Carbon Nanotube Winding for Permanent Magnet Synchronous Generator Considering Coupled Electromagnetic- Thermal Aspects by Vu-Khanh Tran, Thanh-Tuan Nguyen, Tung Nguyen, Jae-Beom Kang, Ji-Young Lee, Yon-do Chun

    Published 2025-01-01
    “…Two Cu-CNT materials with a resistivity of <inline-formula> <tex-math notation="LaTeX">$7.12\times 10^{-8}~\Omega $ </tex-math></inline-formula>.m (Cu-CNT #1) and <inline-formula> <tex-math notation="LaTeX">$2.12\times 10^{-8}~\Omega $ </tex-math></inline-formula>.m (Cu-CNT #2) were tested over speeds ranging from 1000 to 4800 RPM with parametric variations in axial length and outer diameter. Results show that Cu-CNT #2 delivered higher specific power and, at high temperatures, achieved better efficiency than the copper-based model. …”
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  7. 527

    Evaluation of O<sub>3</sub>, H<sub>2</sub>O, CO, and NO<sub><i>y</i></sub> climatologies simulated by four global models in the upper troposphere–lower stratosphere with IAGOS meas... by Y. Cohen, Y. Cohen, D. Hauglustaine, N. Bellouin, N. Bellouin, M. T. Lund, S. Matthes, A. Skowron, R. Thor, U. Bundke, A. Petzold, A. Petzold, S. Rohs, V. Thouret, A. Zahn, H. Ziereis

    Published 2025-06-01
    “…<p>Assessing global models in the upper troposphere (UT) and in the lowermost stratosphere (LS) is an important step toward a better understanding of the chemical composition near the tropopause. …”
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  8. 528

    Growth Stages Discrimination of Multi-Cultivar Navel Oranges Using the Fusion of Near-Infrared Hyperspectral Imaging and Machine Vision with Deep Learning by Chunyan Zhao, Zhong Ren, Yue Li, Jia Zhang, Weinan Shi

    Published 2025-07-01
    “…Based on preprocessed spectra, optimally selected hyperspectral images, and registered RGB images, a dual-branch multi-modal feature fusion convolutional neural network (CNN) model is established. In this model, a spectral branch is designed to extract spectral features reflecting internal compositional variations, while the image branch is utilized to extract external color and texture features from the integration of hyperspectral and RGB images. …”
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  9. 529

    Carbon sequestration, emission reduction, and technical strategies of rice-crayfish farming in central China by Songwen Chen, Yao Guo, Pengli Yuan, Yang Jiang, Cougui Cao

    Published 2025-08-01
    “…In this study, we systematically evaluated the carbon sequestration and emission reduction effects of rice-crayfish farming through field experiment, carbon footprint assessment, and the DeNitrification-DeComposition (DNDC) model. Compared with rice monoculture, rice-crayfish farming increased the soil organic carbon (SOC) storage, and reduced the annual CH4 emissions, annual N2O emissions, and global warming potential (GWP) by 6.4, 2.4 and 6.2%, respectively. …”
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  10. 530

    Characterization of Space Charge Accumulations in Alternative Gas-to-Liquid Oil-Immersed Paper Insulation Under Polarity Reversal Voltage Scenarios by Ya Wang, Yifei Xiong, Zheming Wang, Wu Lu

    Published 2025-06-01
    “…Finally, based on the bipolar charge transport model, the microscopic processes responsible for the differences in two types of oil-immersed papers are discussed.…”
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  11. 531

    Research on the efficient development of shallow geothermal energy: Experimental and numerical investigations on the heat transfer characteristics of the soil-cement energy pile by Huimin RONG, Xun ZHOU, Lizhi WANG, Jia ZHENG, Qimin LI

    Published 2025-03-01
    “…By means of numerical simulation using COMSOL Multiphysic5.0 software and similarity model experiment with a similarity ratio of 1/2, the heat transfer mechanisms of the ground heat exchanger in the soil-cement pile and the soil are compared and studied, the spatio-temporal variation rules of temperature field distribution are discussed, and the calculation method of the soil-cement energy pile is established preliminarily. …”
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  12. 532

    What lurks in the dark? An innovative framework for studying diverse wild insect microbiota by Karol H. Nowak, Emily Hartop, Monika Prus-Frankowska, Mateusz Buczek, Michał R. Kolasa, Tomas Roslin, Otso Ovaskainen, Piotr Łukasik

    Published 2025-08-01
    “…We found orders-of-magnitude differences in bacterial abundance and massive within-population variation in microbiota composition. Patterns and drivers differed among microbial functional categories: the distribution and abundance of facultative endosymbionts (Wolbachia, Rickettsia, Spiroplasma) were shaped by host species, genotype, and sex. …”
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  13. 533

    Motion Control Study of Two-legged Wheeled Robot by Checao YU, Xinzhi MA, Xuejun ZHU, Xudong YANG, Huige LAI, Aidi YANG

    Published 2024-09-01
    “…These models retain all the dynamics characteristics of the robot and connect them to the inter-module motion/force transfer relationship to complete the whole-body dynamics with the wheel-leg-torso interaction force as the end output force model. …”
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    Drift Drives Foraminiferal Community Assembly on a Carbonate Platform by Tao Li, Bo Li, Ziya Lin, Wei Xie, Chupeng Yang

    Published 2025-06-01
    “…ABSTRACT Community composition is determined by four processes: drift, selection, dispersal, and speciation. …”
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  17. 537

    Influence of mining-induced ground fissures on soil infiltration characteristics and its erosion effect in coal mining area of northern Shaanxi in the middle reaches of the Yellow... by Shijie SONG, Xing CHENG, Shuangming WANG, Lu LIU, Yuanhong LI, Jiajie ZHANG, Baodeng CHEN

    Published 2025-02-01
    “…Based on the exponential function, the prediction model of the influence range of mining-induced ground fissures with different widths on the infiltration rate and erodibility K-value of the surrounding soil was constructed. …”
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  18. 538

    Don’t go chasing waterfalls: Multiple factor prediction of injuries in a performance context by Melanie I. Stuckey, Dean Kriellaars

    Published 2025-06-01
    “…This study analyzed demographic, sleep, fatigue, body composition, symmetry/proportionality, and psychological data from a cohort of circus arts students to predict injury presence and duration using regression models. …”
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  19. 539

    Development of craquelure patterns in paintings on canvas by Marcin Bury, Łukasz Bratasz

    Published 2024-10-01
    “…Cracks in central parts of canvas painting were found to be induced by permanent cumulative drying shrinkage of the oil-based paints and grounds due to the evolution of the molecular composition of the oil binder. The outcome of the modelling indicated that the risk of cracking of the pictorial layers in canvas paintings due to drops in ambient relative humidity was small.…”
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  20. 540

    Anatomical Characteristics Predict Response to Transcranial Direct Current Stimulation (tDCS): Development of a Computational Pipeline for Optimizing tDCS Protocols by Giulia Caiani, Emma Chiaramello, Marta Parazzini, Eleonora Arrigoni, Leonor J. Romero Lauro, Alberto Pisoni, Serena Fiocchi

    Published 2025-06-01
    “…This can be attributed to fixed-dose methods, which do not consider inter-subject anatomical variations. This work attempts to overcome this constraint by examining the effects of age and anatomical features, including the volume of cerebrospinal fluid (CSF), the thickness of the skull, and the composition of brain tissue, on electric field distribution and cortical excitability. …”
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