-
6201
Study on the vibration prediction model of step group hole blasting considering non-stationarity
Published 2025-01-01“…The parameters were determined by trial-and-error method to obtain the approximation interval, and then the optimal parameter combinations were optimized by orthogonal test-polar deviation analysis. …”
Get full text
Article -
6202
Exploring the effects of curiosity and anxiety on Mathematics teaching efficacy beliefs in primary school teachers
Published 2025-07-01“…Since the overall Cronbach’s alpha coefficients of the scales used in the study were greater than α > .70, the scale data were considered to be reliable. …”
Get full text
Article -
6203
Impact factors and reference range upper limit of thyroid volume in children aged 8-10 years old in Huangpu District, Shanghai
Published 2025-02-01“…The current reference cut-off points for thyroid volume proposed by the World Health Organization are not based on the Chinese population.ObjectiveTo understand the iodine nutritional status and distribution of thyroid volume (Tvol) among children aged 8-10 years in Huangpu District, Shanghai, China, to identify impact factors of Tvol, and to propose a reference range upper limit for local thyroid health surveillance, so as to provide a basis for goiter control and prevention.MethodsSix hundred children aged 8-10 years in Huangpu District were recruited in 2017, 2020, and 2023, and body height, weight, thyroid volume, urinary iodine, and iodine content of household edible salt were determined. …”
Get full text
Article -
6204
Efficient field correction of low-cost particulate matter sensors using machine learning, mixed multiplicative/additive scaling and extended calibration inputs
Published 2025-05-01“…In this work, we introduce a novel approach to field calibration for cheap PM sensors. Our method integrates multiplicative and additive corrections, with coefficients determined by an artificial neural network (ANN) surrogate. …”
Get full text
Article -
6205
On the formation of thermal barrier coatings by magnetron sputtering
Published 2024-12-01“…The obtained dependencies allowed determining the range of oxygen flow rates at various magnetron discharge powers, at which the work can be performed with stable and sustainable process control, without the risk of falling into hysteresis. …”
Get full text
Article -
6206
LSTM time series prediction of soil moisture content in kiwifruit root zone based on meteorological data fusion
Published 2025-08-01“…In the SMC prediction for the next day, the ATT-LSTM model performs the best, with a coefficient of determination (R²) of 0.749 and a root mean square error (RMSE) of only 2.04 % on the test set. …”
Get full text
Article -
6207
Modelo matemático y procedimiento para la generación gráfica de los contornos de dientes de engranajes cilíndricos. // A mathematical model and procedure for graphic generation of...
Published 2006-01-01“…Additionally,<br />the results are useful for the improvement of the gear tooth model and formulations for the load capacity calculation of cylindrical<br />gears by means of the method of finite elements. For the determination of the calculation procedures based on the mathematical<br />models was established using the technique of dichromatic graphs.…”
Get full text
Article -
6208
Investigação teórica do processo de redução de coliformes em leitos cultivados Theoretical investigation of coliform reduction in constructed wetland
Published 2007-12-01“…The results obtained with the simulation were compared with the reference values to determine the longitudinal dispersion coefficient value which leads to the least residual value for each kind of support bed. …”
Get full text
Article -
6209
Applied AMT machine learning and multi-objective optimization for enhanced performance and reduced environmental impact of sunflower oil biodiesel in compression ignition engine
Published 2024-11-01“…The AMT models demonstrate high prediction accuracy, with coefficient of determination (R2) values exceeding 0.98.…”
Get full text
Article -
6210
Exploring the Causes of Severe Fluctuations in Water Surface Area Using Water Index and Structural Equation Modeling: Evidence from Ebinur Lake, China
Published 2025-04-01“…Utilizing Google Earth Engine (GEE), this study employs Landsat series, Sentinel 2, and MOD09GA/MYD09GA data to extract the water area of Ebinur Lake by applying indices such as NDWI, MNDWI, AWEI, and MAWEI. Threshold determination and shoreline refinement are achieved through Otsu’s method and the Canny algorithm, followed by a comparative analysis. …”
Get full text
Article -
6211
Glomerular diseases related to HIV in Colombian population: Better outcomes with highly active antiretroviral therapy?
Published 2020-09-01“…A longitudinal data model under the Generalized Estimating Equations (GEE) method was used to determine changes on the glomerular filtration rate (GFR) over time. …”
Get full text
Article -
6212
Análise espacial da umidade do solo cultivado com soja sob dois sistemas de manejo Spatial analysis of soil moisture with soybean under two management systems
Published 2007-06-01“…The results indicated a low variation coefficient in all data collections, which indicates homogeneity of the data. …”
Get full text
Article -
6213
Análise da precipitação mensal provável para o município de Lages, SC Analysis of probable monthly rainfall in the municipality of Lages, SC
Published 2010-01-01“…The method of adjustment of model was used to estimate α and β parameters of gamma distribution, and Kolmogorov-Smirnov's test assessed the model's fitting to the data. …”
Get full text
Article -
6214
Remote Sensing Survey of Chlorophyll-a Concentration in River-Type Reservoirs Based on GF-1 Image Data: Taking Feilaixia–Changhu Reservoir Area as an Example
Published 2025-01-01“…The correlation analysis of the chlorophyll-a remote sensing inversion value and the measured value was performed, and the determination coefficient was R<sup>2 </sup>= 0.835 8; the result verification was reasonable. …”
Get full text
Article -
6215
Alpine Meadow Fractional Vegetation Cover Estimation Using UAV-Aided Sentinel-2 Imagery
Published 2025-07-01“…The DNN-based FVC estimation performed best, with a coefficient of determination of 0.82 and a root mean square error (RMSE) of 0.09. (2) In vegetation coverage estimation based on the pixel dichotomy model, different vegetation indices demonstrated varying performances across areas with different FVC levels. …”
Get full text
Article -
6216
Green Hydrogen Synthesis from Human Urine as Sustainable Bioenergy Resources
Published 2024-10-01“…/wt. electrolyte concentration across the system’s operating temperature range yielding an R2 value of 0.711, all the models yielded coefficient of determination values in the range of 0.96 and 0.99, indicating good fit for the alkaline urine electrolysis for green hydrogen synthesis from human urine. …”
Get full text
Article -
6217
Rainfall Prediction Using Integrated Machine Learning Models With K-Means Clustering: A Representative Case Study of Harirud Murghab Basin-Afghanistan
Published 2025-01-01“…The models were evaluated at three stations (Nazdik-i Herat, Shinya, and Torghundi) using coefficient of determination (R2), mean squared error (MSE), root mean squared error (RMSE), Mean absolute error (MAE), and median absolute error (MedAE) as evaluation metrics. …”
Get full text
Article -
6218
Land Use/Land Cover Change Impact on Hydrological Process in the Upper Baro Basin, Ethiopia
Published 2021-01-01“…The performance of the model statistical test shows the coefficient of determination (R2) and Nash–Sutcliffe (NS) efficiency values 0.87 and 0.81 for calibration periods of 1990–2002 and 0.84 and 0.76 for the validation period of 2003 to 2009, respectively. …”
Get full text
Article -
6219
Distinguishing Low Expression Levels of Human Epidermal Growth Factor Receptor 2 in Breast Cancer: Insights from Qualitative and Quantitative Magnetic Resonance Imaging Analysis
Published 2025-03-01“…Methods: Pre-treatment breast MRI images from 232 patients with pathologically confirmed breast cancer were retrospectively analyzed. …”
Get full text
Article -
6220
Temperature simulation and experimental for polishing TC4 with abrasive cloth wheel
Published 2025-06-01“…Therefore, studying the distribution laws and influencing factors of surface temperature in polishing and grinding, and controlling the processing surface temperature are of great significance.MethodsA polishing test platform is built, and polishing temperatures are measured under different process parameters. …”
Get full text
Article