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1801
Desporto Universitário em Portugal: novas perguntas e novas possibilidades (Deporte Universitario en Portugal: Nuevas preguntas y nuevas posibilidades) (University Sports in Portu...
Published 2022-04-01“…., competitive praxis concerned with results, efficiency, performance), “forgetting” the other dimensions/missions. …”
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1802
Numerical Simulation of Low-Level Wind Shear Using CFD and LSTM Technology Based on the WRF Model
Published 2025-04-01“…In an effort to elevate the precision of low-level wind shear forecasting, this paper amalgamates European Centre for Medium-Range Weather Forecasts (ECMWF) fifth-generation reanalysis data (ERA5) and National Centers for Environmental Prediction Final Operational Global Analysis (FNL) reanalysis data, high-resolution Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Model (ASTER GDEM) terrain data, and real-time observational data from Lanzhou Zhongchuan Airport.It employs the Weather Research and Forecasting Model (WRF), WRF integrated with Computational Fluid Dynamics (CFD), and Long Short-Term Memory (LSTM) neural network methods to simulate and analyze two wind shear events at Lanzhou Zhongchuan Airport on April 15-16, 2021.The findings reveal that: (1) within grids smaller than 1 kilometer utilizing Large Eddy Simulation (LES), the WRF model demonstrates superior performance in wind speed simulation for individual stations, yet it falls short when compared to the WRF model combined with Computational Fluid Dynamics (CFD) models in simulating near-surface horizontal wind field wind speeds; (2) concerning the simulation of two low-level wind shears encountered during aircraft landing, both Weather Research and Forecasting Model - Large Eddy Simulation (WRF-LES) and Weather Research and Forecasting Model - Computational Fluid Dynamics (WRF-CFD) models are capable of simulating the first wind shear, however, the second appears to be influenced by the potentially lower wind speed data input into the models, with neither model achieving the threshold for wind speed difference, necessitating further validation in future work; (3) under low wind speed conditions (6 meters per second), the LSTM-based single-variable wind speed prediction model maintains an average absolute error of approximately 0.59 meters per second, effectively capturing the nonlinear relationship of wind speed changes under various terrain and circulation background conditions.Despite being constrained by WRF errors and incomplete observational elements, multi-variable wind speed prediction can achieve wind speed forecasting with higher computational efficiency and generalization capabilities while ensuring that the average absolute percentage error is less than 6.60%.This paper not only verifies the differences between WRF-CFD and WRF-LES coupling schemes in wind field and low-level wind shear forecasting but also explores the feasibility and accuracy of LSTM-based wind speed prediction, aspiring to offer new perspectives and methods for enhancing wind field simulation accuracy and reducing the time required for detailed wind field simulation.…”
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1803
Surface Soil Moisture Estimation Taking into Account the Land Use and Fractional Vegetation Cover by Multi-Source Remote Sensing
Published 2025-02-01“…Sentinel-2 NDVI and MOD09A1 NDVI were fused by the Enhanced Spatial and Temporal Adaptive Reflection Fusion Model (ESTARFM) to obtain NDVI with a temporal resolution better than 8 d and a spatial resolution of 20 m, which improved the matching degree between NDVI and the Sentinel-1 backscattering coefficient (<i>σ</i><sup>0</sup>). …”
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1804
Home Occupant Archetypes
Published 2019-11-01“…A mixed-methods human-centered design approach was developed for which four steps were required to answer the main research question, reflecting also the four parts of this dissertation. 1. …”
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1805
Enhancing wireless applications through reconfigurable electro-mechanical reflectarray antenna design for beam steering
Published 2024-12-01“…The proposed design involves multiple reflective strips at variable heights, enabling significant adaptability to incident waves at various angles. …”
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1806
Detection method of slight bruises of apples based on hyperspectral imaging and RELIEF-extreme learning machine
Published 2019-02-01“…Hyperspectral images of sound and different damage time of Fuji apples were collected, and the average spectral reflectance and entropy were extracted from the region of interest (ROI) of the image. …”
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1807
Perceptual and semantic maps in individual humans share structural features that predict creative abilities
Published 2025-02-01“…Abstract Building perceptual and associative links between internal representations is a fundamental neural process, allowing individuals to structure their knowledge about the world and combine it to enable efficient and creative behavior. In this context, the representational similarity between pairs of represented entities is thought to reflect their associative linkage at different levels of sensory processing, ranging from lower-order perceptual levels up to higher-order semantic levels. …”
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1808
Bi Doped TiO2 as a Photocatalyst for Enhanced Photocatalytic Activity
Published 2023-06-01“…The band gap energies were measured to be of 3.11 eV for TiO2-2 and 3.02 eV for Bi-TiO2 by ultraviolet (UV)-visible diffuse reflectance spectroscopy, revealing that doping Bi improves the efficient interactive relation of the catalyst with visible light. …”
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1809
A Review of Facial Thermography Assessment for Vital Signs Estimation
Published 2022-01-01“…To overcome the limitless human visual perceptions, thermal infrared has proven to be the most effective technique for visualizing facial colour changes that could have been reflected by changes in oxygenation levels and blood volume in facial arteries. …”
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1810
Applying a model for assessing outdoor public spaces: the case study of a city square in Maia, Portugal
Published 2025-03-01“… The application of an effective and efficient model for the assessment of construction design solutions for outdoor public spaces is currently necessary for cities to obtain high quality urban spaces, be it a street, a square or a park. …”
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1811
Detection of Q235 Mild Steel Resistance Spot Welding Defects Based on EMD-SVM
Published 2025-04-01“…Dynamic resistance (DR) reflects nugget growth and varies with defect types, serving as a key indicator. …”
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1812
Opportunities and Challenges for the Development of the Office Furniture Industry: A Case from China
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1813
Normal Heptane Reforming of Promoted Platinum Composite Catalysts: Preparation, Characterization and Catalytic Performance
Published 2020-03-01“…For this purpose, the properties of the catalysts such as X-ray diffraction, X-ray fluorescence, Fourier-transform infrared spectroscopy, Ultraviolet–visible diffuse reflectance spectroscopy, NH3-temperature programmed desorption, H2 chemisorption, N2 adsorption-desorption, and thermal gravimetric analysis were used. …”
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1814
Mobilityas-a-Service - new age trends
Published 2025-04-01“…Modern trends in Mobility-as-a-Service (MaaS) reflect the rapid development of digital technologies in transportation and logistics. …”
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1815
Advances in Nanoengineered Terahertz Technology: Generation, Modulation, and Bio-Applications
Published 2025-01-01“…Finally, it summarizes findings and reflects on future trends and challenges in the field. …”
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1816
Implementation and Evaluation of a Mobile Indoor Positioning System Using the Frequency Switching Model
Published 2024-01-01“…This paper presents the Mobile Access Point-based Model (MAPM), which uses the Received Signal Strength Indicator (RSSI) to accurately estimate positions and address the challenges posed by non-line-of-sight (NLOS) conditions in indoor environments, where signal reflections and multipath effects hinder localization accuracy. …”
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1817
An Exact Top- Query Algorithm with Privacy Protection in Wireless Sensor Networks
Published 2014-02-01“…Performance analysis and simulation results illustrate that, compared to existing algorithms, ETQFD is energy-efficient and the network lifetime in our algorithm is longer. …”
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1818
Collaborative control technology and application of support and modification for soft-rock roadway in a kilometer-deep coal mine
Published 2025-01-01“…The Flac3D numerical model, which can accurately reflect the deformation characteristics of surrounding rock in kilometer-deep soft-rock roadway, has been constructed, and the evolution laws of stress field and its damage mechanism have been analyzed with the vertical stress, vertical displacement and plastic zone. …”
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1819
Preparation of a Smart Port Indicator and Calculation of a Ranking for the Spanish Port System
Published 2020-05-01“…All of them are different and diverse, but the most important common characteristics of these devices or Smart Systems are based on their novel and more efficient way of working. The smart trend is consolidated in the port environment, too. …”
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1820
Optimizing interpolation and quantitative morphometry analysis suitability to soil erodibility modeling for soil erosion risk mapping in a complex topography
Published 2025-12-01“…Results indicate a mean soil erodibility of 0.062 ton•yr•MJ−1•mm−1, with a high bifurcation ratio (12.72) reflecting significant drainage complexity. Average form factor (0.44), elongation ratio (0.74), and wandering ratio (3.60) suggest moderate runoff and efficient drainage. …”
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