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6481
Dual-platform integration of HPTLC and firefly algorithm-optimized chemometrics with hammersley sequence sampling for simultaneous quantification of bisoprolol, amlodipine, and mut...
Published 2025-08-01“…This innovation, combined with a 52 mixture experimental design for calibration (25 mixtures), significantly enhanced model robustness and predictive capability. Both methods demonstrated superior analytical performance with detection limits of 3.56–20.52 ng/band (HPTLC) and 0.011–0.120 μg/mL (FA-PLS), correlation coefficients ≥ 0.9995, and precision (RSD) ≤ 2%. …”
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6482
Challenges and Obstacles in the Development of Winter Sports Tourism in the Ski Slopes of Tehran
Published 2025-03-01“…Based on Cochran’s formula for an unlimited population, the sample size was determined to be 384 individuals. An accessible sampling method was used to select the samples. …”
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6483
A Model for Fat Content Detection in Walnuts Based on Near-Infrared Spectroscopy
Published 2024-10-01“…The results show that the correction set and validation set coefficients of determination of the walnut kernel fat content prediction model using the back propagation neural network algorithm were 0.86 and 0.89, respectively, with root mean square errors of 1.56 and 1.58, and an RPD value of 2.57; the coefficients of determination for the calibration and validation sets of SVR were 0.90 and 0.83, respectively, with root mean square errors of 1.76 and 1.70, respectively, and an RPD value of 1.70. …”
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6484
A theory-informed, experiment-based constraint on the rate of autoxidation chemistry – an analytical approach
Published 2025-07-01“…The process is automated and capable of determining roughly 10<span class="inline-formula"><sup>3</sup></span> rate coefficients per second when run on a PC. …”
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6485
Topology Optimization Design of Automotive Suspension Control Arm
Published 2025-05-01“…Subsequently, the Analytic Hierarchy Process was used to determine the weight coefficients for each operating condition, and an optimization plan was obtained by combining ANSYS finite element analysis. …”
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6486
Diurnal Variation of Soil Heat Flux at an Antarctic Local Area during Warmer Months
Published 2016-01-01“…During the night-time, the soil is a heat source to the shallower soil layers and represents at least 29% of the net night-time radiation. A relatively simple method—the objective hysteresis method (OHM)—was successfully applied to determine the surface soil heat flux using net radiation observations. …”
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6487
Nitrogen-corrected apparent metabolizable energy and standardized ileal amino acid digestibility of Brazilian DDGS for broilers
Published 2025-08-01“…The metabolism and digestibility trials were performed on 20-30 day old chickens, with total excreta method used to determine energy values and the ileal digesta collection method used to determine SIAAD coefficients. …”
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6488
About definition of the law of change of young's modulus at the analysis of longitudinal oscillations of the rod
Published 2009-12-01“…In the paper method for solving the direct problem for a differential equation of second order with variable coefficients is presented. …”
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6489
Approximation of the crack-tip field in fatigue cracks in bridge steel specimens: DIC analysis of different constraint levels
Published 2019-06-01“…Linear elastic fracture mechanics (LEFM) theory in framework of multi-parameter formulation, i.e. postulated by Williams is used to determine of coefficients of Williams power series terms. …”
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6490
Multidimensional analysis of sedentary behaviour and participation in Spanish stroke survivors (Part&Sed-Stroke): a protocol for a longitudinal multicentre study
Published 2023-02-01“…Psychometric properties (eg, internal consistency, construct validity, test–retest reliability) of the Satisfaction with Daily Occupation-Occupational Balance will be determined. Additionally, intraclass correlation coefficients and minimum detectable change will be calculated to assess intrasubject reliability of physical activity and sleep parameters recorded by the Fitbit Inspire 2. …”
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6491
渐开线零齿差内齿轮副变位系数确定方法
Published 2008-01-01“…The principal and steps are presented about the determination of the modification coefficients of an involutes zero-tooth-difference internal gear mechanism.First of all,the optimization method is applied to determine the values of the modification coefficients;secondly,they are modified according to the machining operation;and then,the results should be checked with a view to their feasibility;finally,some software is used to verify the correctness.The whole design procedures are already used in practice successfully.…”
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6492
Global Energy Systems Modeling: Structure and Environmental Impacts
Published 2025-04-01“…Statistical analysis reveals robust correlations between primary energy consumption and environmental indicators, with correlation coefficients exceeding 0.9. The research demonstrates that primary energy consumption patterns and fuel balance structure, rather than emission volumes directly, are primary determinants of environmental impact. …”
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6493
Detection of frictional meltwater on snow surface using a humidity indicator
Published 2024-09-01“… Introduction & Purpose The low friction coefficient of a ski on snow is due to the formation of a meltwater layer between the ski base and the snow surface. …”
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6494
A Diffusive Predator-Prey System with a Free Boundary
Published 2025-04-01“…Nonlinear problems with free boundary are studied using a method based on constructing a priori estimates. Therefore, first, using a method based on constructing a priori estimates, we will determine the constraints on the parameters of the problem, under which it is globally solvable. …”
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6495
Multitarget Direct Localization Using Block Sparse Bayesian Learning in Distributed MIMO Radar
Published 2015-01-01“…Since the sparse representation coefficients exhibit block sparsity, we use a block sparse Bayesian learning (BSBL) method to estimate the locations of multitarget, which has many advantages over existing block sparse model based algorithms. …”
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6496
Psychometric properties and meaningful change thresholds for the QOL-E instrument in patients with myelodysplastic neoplasms
Published 2025-02-01“…The objective of this study was to evaluate the psychometric performance of the QOL-E in patients with LR-MDS.MethodsData from four clinical trials in MDS (MEDALIST, DARB-MDS, EQoL-MDS, and RevMDS trials) were used to assess construct validity, reliability, and responsiveness. …”
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6497
Quantitative Identification of Adulterated Sichuan Pepper Powder by Near-Infrared Spectroscopy Coupled with Chemometrics
Published 2017-01-01“…The determination coefficients of prediction set (Rp2) with the best pretreatments were 0.971 for Sichuan pepper powder, 0.948 for rice bran, 0.969 for wheat bran, 0.967 for corn flour, and 0.994 for rosin powder, respectively. …”
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6498
The Role of Product Quality and Price in Shaping Consumer Purchasing Decisions at Harvest Chicken Express Glenmore
Published 2024-06-01“…Sampling technique with non-probability sampling technique and incidental sampling approach Multiple linear regression analysis techniques, multiple determination coefficients, F and t-tests, validity test, reliability test, and classic assumption test (normality test, multicollinearity, and heteroscedasticity) Tests were carried out with the IBM SPSS Statistics 25 software analysis tool. …”
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6499
Ovarian ROS-dependent IgG accumulation precedes lipofuscin deposition and follicular decline: comparative insights from the bitch and mouse models of ovarian aging
Published 2025-05-01“…Immunohistochemistry was employed to determine IgG deposition and western blotting for its quantification. …”
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6500
An intelligent environmental-sensorless model for real-time optimization in photovoltaic-energy systems: Fast computation, long-term performance, and experimental validation
Published 2025-10-01“…Thanks to its lightweight structure and offline training process, the proposed IVRNN model ensures real-time deploy ability with negligible computational cost. Overall, the method provides a fast, accurate, and scalable solution for MPP determination in sensor-constrained environments. …”
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