15 results for “curve fitting”

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Research ArticleOpen accessIn the abstractEffects of ZnO on Dielectric Properties and Electrical Conductivity of Ternary Zinc Magnesium Phosphate GlassesS. F. Khor, Z. A. Talib, H. A.A. Sidek et al.Five different compositions of the ternary system (ZnO)x(MgO)30(P2O5)70-x containing 8, 10, 13, 15 and 18 moL% of ZnO were prepared by the melt quenching technique. The complex permittivity studies were presented in the frequency range of 0.01 Hz to 1 MHz and over the temperature range of 303-573 K. The empirical data were analyzed by means of the curve-fitting technique … …American Journal of Applied Sciences, Vol. 6, Issue 5 · 31 May 2009 · 8,240 accessesView PDF Cite

Research ArticleOpen accessIn the abstractCalibration and Simultaneous Monitoring of Soil Water Content and Salinity with Capacitance and Four-electrode ProbesTadaomi Saito, Haruyuki Fujimaki, Mitsuhiro InoueNon-destructive monitoring of soil water content (W) and the electrical conductivity of the soil solution (ECw) has been desired for environmental evaluation and sustainable agriculture. Dielectric probes and four-electrode probes are widely used for the non-destructive determination of W and the soil bulk electrical conductivity (ECb), respectively. Since the output of dielectric probes is affected by soil salinity, the calibration … …American Journal of Environmental Sciences, Vol. 4, Issue 6 · 31 Dec 2008 · 7,918 accessesView PDF Cite

Research ArticleOpen accessIn the abstractModeling of Stress- Strain Curves of Drained Triaxial Test on SandAwad Al- Karni, Abdulhafiz AlshenawyThis paper presents a hyperbolic mathematical model to predict the complete stress-strain curve of drained triaxial tests on uniform dense sand. The model was formed in one equation with many parameters. The main parameters that are needed to run the model are the confining pressure, angle of friction and the relative density. The other parameters, initial and final slopes of … …American Journal of Applied Sciences, Vol. 3, Issue 11 · 30 Nov 2006 · 6,838 accessesView PDF Cite

Research ArticleOpen accessIn the abstractCylinder Pressure Variations of the Fumigated Hydrogen-Diesel Dual Fuel CombustionBoonthum Wongchai, Porranat Visuwan, Sathaporn ChuepengCylinder pressure is one of the main parameters of diesel engine combustion affecting several changes in exhaust gas emission composition and amount as well as engine useful power, specifically when alternative fuels are used. One among other alternative fuels for diesel engine is hydrogen that can be used as fumigated reagent with air prior to intake to engine in order … …American Journal of Applied Sciences, Vol. 9, Issue 12 · 12 Dec 2012 · 7,443 accessesView PDF Cite

Research ArticleOpen accessAll words, across the recordA Multi-Criteria Optimization Approach to Cam Curve Design Combining Different Splines Given by Fixed and Adjustable CheckpointsLéo Moussafir, Vigen ArakelianThis study proposes a multi-criteria design optimization of cam mechanisms. This approach is based on the multistage interconnection of different tools: MATLAB, ADAMS, and mode frontier. It consists of three main issues: (i) The polynomial representation of splines given by checkpoints defining the specific motion of the follower; (ii) The connection of these splines by different degrees of fitting in … …Journal of Mechatronics and Robotics, Vol. 7, Issue 1 · 24 Mar 2023 · 6,646 accessesView PDF Cite