-
1221
Research on TOC Log Evaluation Method Based on PCA-BP Neural Network
Published 2024-08-01“…The prediction results of the cumulative 410m section of three coring wells show that the determination coefficient of the model is as high as 0.879, the average absolute error and mean square error of the prediction results are 0.220and 0.107, respectively, and the mean relative deviation is 16.1%. …”
Get full text
Article -
1222
Quantitative Method for Evaluating Shale Oil Resources Based on Movable Oil Content
Published 2021-01-01“…Based on field and laboratory experimental data from the second member of the Kongdian Formation in the Cangdong Sag, Bohai Bay Basin, the retained oil and movable oil contents in shale were calculated using a mathematical formula, and the total resources were quantified. The correction coefficient of S1 from pyrolysis and the adsorption of oil by the total organic carbon (TOC) were determined to be 1.25 and 100 mg/g, respectively. …”
Get full text
Article -
1223
Experimental and theoretical studies of the construction and technical properties of fire-retardant vermiculite-concrete composites
Published 2024-04-01“…Study of the dependence of the compressive strength on the average density and the flexural strength on the compressive strength of vermiculite concrete composite. Determination of the expression for the coefficients of thermal conductivity and heat capacity of the resulting vermiculite concrete composites in the developed software for thermal engineering calculation of the fire resistance limit of reinforced cement structures with a fire retardant layer of vermiculite concrete.Method. …”
Get full text
Article -
1224
Research into the Influence of Millimeter-Wave Antennas on Direction Finding Errors by Phase Method
Published 2023-05-01“…To study the influence of millimeter-wave antennas on the errors of the phase direction finder.Materials and methods. For a series of four millimeter-wave antennas, the following characteristics were obtained: spatial gain readings, phase diagram readings, and complex reflection coefficient values. …”
Get full text
Article -
1225
A method for predicting postpartum depression via an ensemble neural network model
Published 2025-04-01“…The weights of FCNN and DNN in the proposed model are determined by their accuracies on the training set and respective Dropout values. …”
Get full text
Article -
1226
STUDY THE EFFECT OF SHOT PEENING RESIDUAL STRESSES ON COMPRESSIVE STRENGTH OF STIFFENED PANEL
Published 2020-01-01“…A simple determination method for influence coefficient of shot peening is given and the functions in engineering are amended. …”
Get full text
Article -
1227
Electronic transport study for SF6 Plasma
Published 2022-11-01“… Determination the electron transport parameters, (drift velocity ( ) , mean electron energy ( ), diffusion coefficient (D), mobility ( ) and ionization coefficient ( ) ), in an attempt to show the influence of the presence of dust on their behavior in a direct current low pressure SF6 glow discharge .The Boltzmann Transport Equation (BTE), using two-term approximation are solved self-consistly. …”
Get full text
Article -
1228
Evaluation by Multivariate Statistical Methods of Relationship with Physicochemical Properties of Humic Acid and Some Soil
Published 2020-12-01“…In this study, HA (humic acid) contents of soil samples taken from 12 different locations were determined by appropriate method. After extracting the humic acid from the soil samples, the remaining soil elements concentrations were determined by ICP-OES method. …”
Get full text
Article -
1229
Calibration of the ångström-Prescott Equation for Solar Radiation Estimation in Minas Gerais
Published 2025-06-01“…The use of the calibrated coefficients presented in this work or the standard method are both effective and show no difference between them. …”
Get full text
Article -
1230
Lisímetro de pesagem de grande porte. parte II: consumo hídrico do coqueiro anão verde irrigado Large-scale weighing lysimeter. part II: water requirements of the irrigated dwarf-g...
Published 2011-05-01“…<br>This paper, as Part II of a research carried out in Sergipe state, aims to determine evapotranspiration and crop coefficient of dwarf-green coconut (Cocos nucifera L.) based on lysimeter measurements and Bowen ratio-energy balance method. …”
Get full text
Article -
1231
Faulty feeder selection based on improved Hough transform in resonant grounded distribution networks
Published 2024-02-01“…Due to the weak fault characteristics and inaccurate fault line selection during high impedance faults, this paper proposes a new method for fault line selection in resonant grounded distribution networks based on improved Hough transform. …”
Get full text
Article -
1232
Rice Identification and Spatio-Temporal Changes Based on Sentinel-1 Time Series in Leizhou City, Guangdong Province, China
Published 2024-12-01“…The results revealed that by analyzing SAR-intensive time series data, we were able to determine the backscattering coefficient of typical crops in Leizhou and use the threshold segmentation method to identify rice labels in SAR-intensive time series images. …”
Get full text
Article -
1233
Technique for Evaluating the Uncertainty of Enthalpy of Water and Steam for Thermal Energy Metering Systems
Published 2018-12-01“…The relative deviations of the sensitivity coefficients obtained by the simplified dependencies from the values obtained by the equations of International Association for the Properties of Water and Steam (IAPWS) are 0.48% (for the sensitivity coefficient of uncertainty of enthalpy to uncertainty of pressure) and 0.56% (for the sensitivity coefficient of uncertainty of enthalpy to uncertainty of temperature) for the above pressure and temperature ranges. …”
Get full text
Article -
1234
-
1235
Study on spatial distribution and inequity of rail transit travel accessibility under multi modal traveling: A case study of Beijing
Published 2025-05-01“…By combining the calculation results with population distribution data, the current state of accessibility equity is assessed. The IPA analysis method is employed to determine the priority order for different area modifications and to propose corresponding suggestions for optimization. …”
Get full text
Article -
1236
Nondestructive method for estimating the leaf area of sapodilla from linear leaf dimensions
Published 2022-11-01Get full text
Article -
1237
Comparison of diagnostic accuracy of 2D and 3D measurements to determine opportunistic screening of osteoporosis using the proximal femur on abdomen-pelvic CT.
Published 2022-01-01“…Diagnostic performance, correlation analysis and measurement reliability were analyzed by receiver operating characteristic curves, correlation coefficient and interobserver correlation coefficient (ICC), respectively.…”
Get full text
Article -
1238
Some Reliability Issues of the Corrugated I-Beam Girder
Published 2015-01-01“…The indices of reliability are determined for the maximum deflections of the beam as the function of an input coefficient of variation of the web’s thickness whose meaning is the extent of a corrosion process.…”
Get full text
Article -
1239
Complex investigations of the critical n-amylic alcohol-nitromethane mixture with acousto-optic methods
Published 2015-07-01“…With the application of the achieved mean concentration relaxation time, τ_α, correlation radius of concentration fluctuations, ξ, and the diffusion coefficient, D, the average length of concentration waves Λ_α in the mixture under investigation has been determined.…”
Get full text
Article -
1240
Comparison of different spatial interpolation methods for historical hydrographic data of the lowermost Mississippi River
Published 2019-04-01“…Those interpolators were compared in terms of root-mean-square error (RMSE), mean absolute error (MAE), bias, and coefficient of determination (r2). Our results demonstrate that both of RBF and OKA performed the best in mapping the bathymetry of study reaches. …”
Get full text
Article