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6721
Analysis of Friction Torque Characteristics of a Novel Ball–Roller Composite Turntable Bearing
Published 2025-07-01“…Axial clearance has a significant influence, and an optimal clearance value between the balls and rollers is determined. Additionally, a reasonable range for the raceway curvature radius coefficient is proposed. …”
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6722
Nonlinear squeezing flow of stratified fluids: A comprehensive study on convective conditions and probable errors
Published 2025-07-01“…In addition, Sherwood number, Nusselt number, and skin friction coefficient are determined for various parameter values, with their statistical significance examined using correlation coefficients and probable error analysis. …”
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6723
Estimation of Annual Routine Maintenance Cost for Highway Tunnels
Published 2022-01-01“…Compared with grouped regression models, the fixed-effect regression model has higher fitting accuracy and a better regression coefficient significance. The quick independent variable selection method can shorten the time of establishing the model and determine the influencing factors of the research object effectively. …”
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6724
Adsorption and Co-Adsorption of Polyaldehyde Dextran Nanoparticles and Nonionic Surfactant at an Air–Water Interface: Potential Implications for Pulmonary Drug Delivery
Published 2017-03-01“…The dynamic surface tension of the samples was determined by the maximum bubble pressure (MBP) method and by the axisymmetric drop shape analysis (ADSA). …”
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6725
Simulation of silicon wafers heating during rapid thermal processing using “UBTO 1801” unit
Published 2020-11-01“…The time of phase transition formation on the wafer surface during rapid thermal processing was fixed by pyrometric method. In accordance with the developed mathematical model, we determined the conversion coefficient of the lamps electric power to the light flux power density with the numerical value of 5.16∙10-3 cm-2 . …”
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6726
INVESTIGATION OF THE RELATIONSHIP BETWEEN SERVANT LEADERSHIP AND INTRAPRENEURSHIP BY THE EXPLANATION OF THE ROLE OF ORGANIZATIONAL CULTURE: THE CASE OF PRIVATE BANKS
Published 2022-05-01“…Through the application of the Cochran's formula, the research sample size was determined as 425 individuals. The samples have been collected through the application of stratified sampling method and the required research data were collected through the application of the servant leadership, intrapreneurship and, organizational culture inventories. …”
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6727
Hexavalent Chromium Removal from Model Water and Car Shock Absorber Factory Effluent by Nanofiltration and Reverse Osmosis Membrane
Published 2017-01-01“…Spiegler-Kedem model was applied to experimental results in the aim to determine phenomenological parameters, the reflection coefficient of the membrane (σ), and the solute permeability coefficient (Ps). …”
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6728
A Sea Horse Optimization-Based Approach for PEM Fuel Cell Model Parameter Estimation
Published 2025-07-01“…Overall, the SHO algorithm is demonstrated to be an efficient, robust, and promising alternative to conventional methods for parameter identification in PEMFC modeling.…”
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6729
Towards precision in bifacial photovoltaic system simulation: a model selection approach with validation
Published 2025-03-01“…This study employs a number of validation metrics, including relative error, coefficient of determination and Normalized Root Mean Square Error, to assess the accuracy of the simulations. …”
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6730
Modeling and Key Parameter Interaction Analysis for Ship Central Cooling Systems
Published 2025-06-01“…To achieve efficient prediction and optimization of the energy consumption of ship central cooling systems, this paper first constructed and validated a high-precision multi-physical domain simulation model of the ship central cooling system based on fluid heat transfer principles and the physical network method. …”
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6731
Tunnel water inflow prediction using explainable machine learning and augmented partially missing dataset
Published 2025-04-01“…The results indicate that: (1) The constructed BO-XGBoost model exhibited exceptionally high predictive accuracy on the test set, with a root mean square error (RMSE) of 7.5603, mean absolute error (MAE) of 3.2940, mean absolute percentage error (MAPE) of 4.51%, and coefficient of determination (R2) of 0.9755; (2) Compared to the predictive performance of support vector mechine (SVR), decision tree (DT), and random forest (RF) models, the BO-XGBoost model demonstrates the highest R2 values and the smallest prediction error; (3) The input feature importance yielded by SHAP is groundwater level (h) > water-producing characteristics (W) > tunnel burial depth (H) > rock mass quality index (RQD). …”
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6732
Assessment of Poverty Levels in Kazakhstan: The Impact of Cash Income Deficiency
Published 2025-04-01“…The article uses descriptive statistical methods to study the dynamics of poverty and correlation and regression analysis to identify the relationship between poverty and indicators such as average nominal income per capita, Gini coefficient, unemployment rate and household size. …”
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6733
Evaluation of Efficacy of Artificial Intelligence in Orthopantomogram in Detecting and Classifying Radiolucent Lesions
Published 2023-07-01“…The Cohen kappa correlation coefficient was used for assessment of reliability of the diagnostic methods. …”
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6734
Segmental Model for Comparing the Value of Organizations (Utility-based)
Published 2021-02-01“…The implementation of the model makes it possible to compare the dynamics of the activities of organizations with industry competitors for a selected period of time, at the strategic level to determine directions for increasing the utility coefficient, and in the future, it can be used as an alternative method for assessing the value of companies.…”
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6735
Correlation of Facial Skin Colour and Melanin Pigmentation in the Gingiva of Children in Primary, Mixed and Permanent Dentition: An Observational Study
Published 2025-01-01“…The correlation was positive and low between age and pigmentation at the attached gingiva as the correlation coefficient. The correlation was positive and low between skin pigmentation and pigmentation at attached and marginal gingiva as the correlation coefficient. …”
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6736
Numerical investigation of added resistance of a container ship in short regular waves using unsteady RANS simulations
Published 2025-01-01“…A body-fitted, full-hexahedral unstructured mesh models the ship’s motion, while the volume of fluid (VoF) method determines the free surface. Regular head waves of relatively short wavelengths, ranging from 0.22 ≤ λ/LPP ≤ 0.65, are considered in the simulations. …”
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6737
The Effect of Psychological Capital on Organizational Crisis Management: A survey study of the views of a sample of the Administrative leadership of the Ministry of Sports and Yout...
Published 2020-12-01“…Psychological capital as an independent variable with four important dimensions (self-efficacy, hope, flexibility, optimism) in addition to three dimensions representing the adopted variable organizational crisis management (speed of response decision, communication and information flow, mobilization and resource mobilization) and formed a sample To search (203) Director (Section, Division, Unit) and distributed them included a questionnaire (32), paragraph, In light of this, data were collected and analyzed and hypotheses were tested using SPSS using a number of statistical methods including arithmetic mean, standard deviation, coefficient of variation, coefficient of determination and variance test. …”
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6738
Diseño y validación de un cuestionario de percepciones de estudiantes sobre la enseñanza a través de analogías en docentes de ciencias del deporte. (Design and validation of a ques...
Published 2024-08-01“…Reliability was determined through the α-Cronbach and ω-McDonald's coefficients. …”
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6739
Modern trends in Kazakhstan agriculture in the context of integration to the world economy
Published 2025-03-01“…The following general scientific methods were used in the research: the methods of analysis, synthesis and formalization; graphical methods, methods of statistical analysis, method of comparisons, analysis of dynamics and structure; method of causal and logical relationships and dependencies; SWOT analysis and minimax analysis. …”
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6740
Improving SOC estimation in low-relief farmlands using time-series crop spectral variables and harmonic component variables based on minimum sample size
Published 2025-06-01“…These findings suggest that the proposed method holds the potential for efficient SOC estimation in low-relief farmlands.…”
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