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Articles de revues sur le sujet « PARAMETRIC INVESTIGATION »

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Auteur : Grafiati
Publié le 11 septembre 2023

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1

Poladian, Sajad, et Farshad Farahbod. « Parametric investigation of moving properties of zinc oxide nano-fluid ». Scholars Academic Journal of Biosciences 4, no 7 (juillet 2016) : 555–59. http://dx.doi.org/10.21276/sajb.2016.4.7.1.

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Hegab, Hassan I. A. « Parametric Investigation of Cable‐Stayed Bridges ». Journal of Structural Engineering 114, no 8 (septembre 1988) : 1917–28. http://dx.doi.org/10.1061/(asce)0733-9445(1988)114:8(1917).

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Iyer, Nandini, Babette Eaton et Ramkumar Sridharan. « Parametric investigation of the virtual glide ». Journal of the Acoustical Society of America 106, no 4 (octobre 1999) : 2209. http://dx.doi.org/10.1121/1.427504.

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Hung, Hazel S. S., Jerry Prawiharjo, Nikita K. Daga, David C. Hanna et David P. Shepherd. « Experimental investigation of parametric transfer in synchronously pumped optical parametric oscillators ». Journal of the Optical Society of America B 24, no 12 (15 novembre 2007) : 2998. http://dx.doi.org/10.1364/josab.24.002998.

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Liao, Yan Ping, Li Liu et Teng Long. « Investigation of Various Parametric Geometry Representation Methods for Airfoils ». Applied Mechanics and Materials 110-116 (octobre 2011) : 3040–46. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.3040.

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Abstract—This paper presents the investigation of typical parametric geometry representation methods for airfoils, namely, PARSEC method, orthogonal basis function method and CST method. The investigation assesses the fitting accuracy of these parametric methods for various airfoils including the symmetric airfoil, cambered airfoil and supercritical airfoil. The design variables of these parametric methods are solved by the methods of least squares fit. The fitting results show that the fitting accuracy of CST method is better than other parametric methods for airfoil. The aerodynamics analysis models of these typical parametric geometry representation methods for airfoil are constructed. The pressure distributions calculated for different parametric methods are compared with the corresponding experimental pressure distributions for the actual airfoil geometry.Keywords-orthogonal basis function; PARSEC; CST; fitting accuracy; pressure distributions
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Babanov, N. Yu, A. V. Klyuev, S. V. Lartsov et V. P. Samarin. « Investigation of stripline parametric passive radio transponders ». IOP Conference Series : Materials Science and Engineering 1047, no 1 (1 février 2021) : 012073. http://dx.doi.org/10.1088/1757-899x/1047/1/012073.

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Yap, Hiew Thong, Su Kong Ngien, Norasman Bin Othman, Nadiatul Adilah Binti Ahmad Abdul Ghani et Norhan Bin Abd Rahman. « Parametric investigation in Malaysian separate sewer systems ». Proceedings of the Institution of Civil Engineers - Municipal Engineer 170, no 2 (juin 2017) : 90–96. http://dx.doi.org/10.1680/jmuen.16.00019.

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Dafni, Jacob, et Joseph Wartman. « Centrifuge Studies of Topographic Effects : Parametric Investigation ». Bulletin of the Seismological Society of America 111, no 4 (22 juin 2021) : 2087–100. http://dx.doi.org/10.1785/0120200354.

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ABSTRACT This article presents the results of a comprehensive geotechnical centrifuge experimental program to investigate topographic effects across a series of single-sided slopes. The experimental campaign considered a range of governing factors, including slope inclination and ground-motion amplitude, frequency content, and duration. The testing program was nondestructive, allowing the centrifuge models to be subjected to over 140 different ground motions. Clear evidence of topographic effects, including amplification and deamplification of ground motion, were observed. Topography modified the frequency content and amplitude of the ground motion such that at the slope crest (1) peak ground accelerations ranged from 50% less than to 200% greater than the free-field, and (2) ground-motion mean square frequency shifted by as much as 55%. Higher topographic amplification levels lead to a larger topographic zone of influence, which, on average, spanned a distance equal to the slope height (H) behind and 2H in front of (toward slope) the slope crest. Physical modeling in the centrifuge proved to be a powerful experimental technique for generating empirical data to analyze topographic effects in a systematic and repeatable manner.
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Daqaq, Mohammed F., Christopher Stabler, Yousef Qaroush et Thiago Seuaciuc-Osório. « Investigation of Power Harvesting via Parametric Excitations ». Journal of Intelligent Material Systems and Structures 20, no 5 (28 novembre 2008) : 545–57. http://dx.doi.org/10.1177/1045389x08100978.

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This article presents an analytical and experimental investigation of energy harvesting via parametrically excited cantilever beams. To that end, we consider a lumped-parameter non-linear model that describes the first-mode dynamics of a parametrically excited cantilever-type harvester. The model accounts for the beam's geometric and inertia non-linearities as well as non-linearities representing air drag. Using the method of multiple scales, we obtain approximate analytical expressions describing the beam response, voltage drop across a purely resistive load, and output power in the vicinity of the first principle parametric resonance. Using these expressions, we study the effect of the electromechanical coupling and load resistance on the output power. We show that these parameters play an imperative role in determining the magnitude of the output power and characterizing the broad-band properties of the harvester. Specifically, we show that the region of parametric instability wherein energy can be harvested shrinks as the coupling coefficient increases. Furthermore, we show that there exists a coupling coefficient beyond which the peak power decreases. We also demonstrate that there is a critical excitation level below which no energy can be harvested. The amplitude of this critical excitation increases with the coupling coefficient and is maximized for a given load resistance. Theoretical findings that were compared to experimental results show good agreement and reflect the general trends.
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Conroy, P. J., P. Weinacht et M. J. Nusca. « Parametric Erosion Investigation : Propellant Adiabatic Flame Temperature ». Defence Science Journal 52, no 1 (1 janvier 2002) : 77–85. http://dx.doi.org/10.14429/dsj.52.2152.

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Alevras, Panagiotis, Iain Brown et Daniil Yurchenko. « Experimental investigation of a rotating parametric pendulum ». Nonlinear Dynamics 81, no 1-2 (1 mars 2015) : 201–13. http://dx.doi.org/10.1007/s11071-015-1982-8.

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Levitin, E. S. « Investigation of some parametric convex programming problems ». Computational Mathematics and Modeling 3, no 4 (1992) : 402–9. http://dx.doi.org/10.1007/bf01133068.

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Ganjovi, Alireza A., et Nandini Gupta. « Parametric investigation of stationary plasma thruster performance ». Electrical Engineering 90, no 8 (5 décembre 2008) : 551–58. http://dx.doi.org/10.1007/s00202-008-0106-6.

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Abdullah, Kamil, Firdauz Amon et Mas Fawzi Mohd Ali. « Parametric Study on Geometrical Arrangement of Sister Hole ». Applied Mechanics and Materials 773-774 (juillet 2015) : 373–77. http://dx.doi.org/10.4028/www.scientific.net/amm.773-774.373.

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Modern gas turbines require a sophisticated cooling scheme to remove the heat from its component to ensure it durability. One of the common techniques applied in the cooling scheme is film cooling The present study focuses numerical investigation of an sister cooling hole design. The investigations make use of commercial CFD software, ANSYS CFX. The numerical investigations have been carried out at Reynolds number, Re = 21,000 involving three differens blowing ratios, BR = 0.5, 1.0, and 1.5. Four different cases have been considered; STA, STB STC and SH. The results show promising improvement in terms of film cooling effectiveness with the implementation of sister holes in certain geometrical arrangements.
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Power, Christine, Aonghus McNabola et Paul Coughlan. « A Parametric Experimental Investigation of the Operating Conditions of Gravitational Vortex Hydropower (GVHP) ». Journal of Clean Energy Technologies 4, no 2 (2015) : 112–19. http://dx.doi.org/10.7763/jocet.2016.v4.263.

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Li, Yuan, Zhi Li et Chang Xu. « Ancient Chinese architecture in the future –An investigation with parametric modeling tools ». E3S Web of Conferences 237 (2021) : 03015. http://dx.doi.org/10.1051/e3sconf/202123703015.

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With the flexibility and modularity of the construction system, the ancient Chinese architecture was a configurative system until the modern time when it became figurative with nationalistic symbolism, and lost its flexibility to adapt in different functions. Through this study, the researchers try to exploit and release the powerful adaptation of this configurative system by using the method of parametric design. First of all, according to the modern parametric theory, the logic of the traditional structural system is found out by abandoning the feudal social hierarchical factors. And then, a 3D model of parametric structure with wide adaptability is established in Rhino by using its parametric design plug-in Grasshopper. Finally, on the basis of the modern parametric skin theory, two skin systems are attached to this new structure separately, in order to prove the feasibility of the new skin idea to this structure. Through the introduction of parametric modeling steps, this paper focuses on mining the modern adaptability of Chinese traditional architecture.
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XU, HAIBIN, BO WU, SHUANGSHUANG CAI et YONGHANG SHEN. « INVESTIGATION ON THE PUMP ACCEPTANCE BANDWIDTH FOR COLLINEAR QUASI-PHASE-MATCHING OPTICAL PARAMETRIC AMPLIFICATION ». Journal of Nonlinear Optical Physics & ; Materials 18, no 01 (mars 2009) : 141–51. http://dx.doi.org/10.1142/s021886350900452x.

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We investigated the issue of parametric bandwidth for a collinear quasi-phase-matching (QPM) optical parametric amplification (OPA). Mathematical model for evaluating the parametric bandwidth tolerance of the OPA was derived by expanding the wave-vector mismatch in Taylor series and taking the first two terms into consideration for accuracy. Based on the model, the variation of pump acceptance spectral bandwidth with parametric wavelength was discussed. The correlating curve of the pump wavelength and the parametric wavelength was obtained for the largest pump acceptance spectral bandwidth. These results were compared to that obtained by numerically calculating the parametric gain curves of OPA when pumped with different Gauss bandwidths by means of three-wave mixing equations directly, and were found to be in good accordance. The results presented are helpful for specifying the optimal pump wavelength of the parametric amplification and oscillation.
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Gany, Alon, et Igor Feldman. « PARAMETRIC INVESTIGATION OF SUPERSONIC COMBUSTION OF SOLID FUELS ». International Journal of Energetic Materials and Chemical Propulsion 5, no 1-6 (2002) : 366–74. http://dx.doi.org/10.1615/intjenergeticmaterialschemprop.v5.i1-6.390.

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Jung, Donghwan, Jiyoung Song, Jeasoo Kim et Jaehyuk Lee. « Comparative Experimental Investigation on Optimal Parametric Array Types ». Sensors 21, no 15 (27 juillet 2021) : 5085. http://dx.doi.org/10.3390/s21155085.

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As a sound transmitting device that relies on the nonlinearity of a medium, a parametric array (PA) can generate high-directivity low-frequency signals using a small aperture transducer and high-frequency signals. Despite their relatively low source level, the PA is frequently used to measure the acoustic properties of materials in low-frequency regions owing to their high directivity in confined acoustic water tanks. Therefore, methods for improving the source level of secondary signals are of interest. Currently, there are two driving methods for PA: the dual-frequency PA and the broadband PA with amplitude modulation. In this study, we share the results of an elaborate and comparative experimental investigation of these two driving methods. Comparisons are made and discussed in terms of the intensity of the generated secondary signal and its characteristics in the frequency domain. Based on these factors, we confirmed that the broadband PA was more suitable as the sound source of the low-frequency characteristic measurement system of acoustic materials.
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Bermudez, Leonardo, Russell Taylor Johns et Harshad Champaklal Parakh. « Parametric Investigation of WAG Floods Above the MME ». SPE Journal 12, no 02 (1 juin 2007) : 224–34. http://dx.doi.org/10.2118/84366-pa.

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Summary Water-alternating-gas floods (WAG) are commonly used to improve sweep efficiency in heterogeneous reservoirs. There has been little reported in the literature, however, on the effectiveness of WAG processes where the gas is enriched above the minimum miscibility enrichment composition (MME). This paper examines how to optimize WAG processes for enriched gasfloods above the MME, particularly as a primary recovery method. Compositional simulations of x-z cross-sections are used to quantify the effects of WAG parameters, numerical dispersion, level of enrichment, and heterogeneity on local displacement efficiency and sweep efficiency. The main conclusions of this research show that the richer the gas above the MME, the fewer the number of WAG cycles required for maximum oil recovery at a given WAG ratio. Another significant observation is that overenrichment above the MME improves recovery the most when the largest permeability layers are at the bottom of the reservoir. Continuous slug injection performs better than WAG when the largest permeability layers are at the bottom of the aquifer, richer gases are used, and the vertical to horizontal permeability ratio is small. Introduction Gas enrichment is one of the important optimization variables in WAG enriched-gas floods. Recoveries from slimtube experiments with continuous gas injection often give a sharp bend at the minimum enrichment for miscibility (MME). Above the MME, slimtube recoveries do not increase significantly with enrichment. The optimum enrichment required to maximize recovery on a pattern scale in the field, however, is likely different from the MME. The difference in the optimum enrichment may be largely the result of greater mixing in the reservoir than exists in slimtubes. In addition, enrichment may impact sweep efficiency in 2D displacements. Oil and gas mixing in a reservoir can include mechanisms such as molecular diffusion, mechanical dispersion, gravity crossflow, viscous crossflow, and capillary crossflow. WAG in particular causes significant mixing of reservoir and injected fluids, depending on the total volume of the gas injected (slug volume), the WAG ratio, and the number of gas cycles or WAG frequency. There are several reasons why recovery could increase for gas enrichments above the MME. First, the density and viscosity of the gas will increase with enrichment, which may improve sweep efficiency. Second, mixing can cause an otherwise multicontact miscible flood (MCM) to develop some two-phase flow (Johns et al. 1993; Walsh and Orr 1990; Pande and Orr 1989; Lake 1989). Richer gases mix closer to the critical locus in the two-phase zone, which causes a smaller and slower lean gas bank. A smaller lean gas bank could improve sweep efficiency. Last, richer gases, which mix near the critical locus, decrease "miscible residual oil" by increasing the velocity of the trailing evaporation fronts.
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Mostafa, Suhail, Shyam Bose, Archana Nair, Mansoor Abdul Raheem, Thasneem Majeed, Atiqur Mohammed et Young Kim. « A parametric investigation of non-circular spiroid winglets ». EPJ Web of Conferences 67 (2014) : 02077. http://dx.doi.org/10.1051/epjconf/20146702077.

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Thompson, Phillip E., David Godbey, Karl Hobart, Evan Glaser, Thomas Kennedy, Mark Twigg et David Simons. « Parametric Investigation ofSi1-xGex/SiMultiple Quantum Well Growth ». Japanese Journal of Applied Physics 33, Part 1, No. 4B (30 avril 1994) : 2317–21. http://dx.doi.org/10.1143/jjap.33.2317.

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Feranchuk, I. D., et A. V. Ivashin. « Theoretical investigation of the parametric X-ray features ». Journal de Physique 46, no 11 (1985) : 1981–86. http://dx.doi.org/10.1051/jphys:0198500460110198100.

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Javed, Arshad, et BK Rout. « Investigation on parametric sensitivity of topologically optimized structures ». Proceedings of the Institution of Mechanical Engineers, Part C : Journal of Mechanical Engineering Science 226, no 11 (7 février 2012) : 2791–804. http://dx.doi.org/10.1177/0954406212437513.

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Topology optimization is a powerful method of material minimization in structural design problems. The obtained topology and the compliance values by this method are very sensitive to each of the input parameters such as, applied force, volume fraction, dimensions, and support-rigidity. In real-life situations, these parameters may vary due to material uncertainty, manufacturing imperfections, and operating conditions. Hence, the topology obtained during the conceptual design phase may not suffice the actual working condition. Thus, it is desirable to explore individual and the combined effects of the parametric variations and uncertainties. This study describes a systematic approach utilized to investigate the effect of different input parameters on compliance values along with material and load uncertainties for a topologically optimized structure. In this paper, applied force, volume fraction, and aspect ratio of the domain are treated as input parameters and their effects are analyzed. Proposed work modifies the solid isotropic microstructure with penalization method to incorporate the effect of uncertainties and uses design of experiments approach to investigate statistically significant input parameters. Four different benchmark problems available in the literature are analyzed and the results are obtained for aforesaid input parameters along with uncertainties. Results obtained from this investigation will help designers/practitioners to select suitable input parameters combination to achieve targeted compliance.
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KAR, PINAKI, et JOHN E. RENAUD. « Parametric Investigation of Integrated Plastic Snap Fastener Design ». Journal of Engineering Design 8, no 1 (mars 1997) : 33–52. http://dx.doi.org/10.1080/09544829708907951.

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Medina, D. F., L. Wright et M. Campbell. « Parametric investigation of solar panel hypervelocity impact damage ». Advances in Space Research 28, no 9 (janvier 2001) : 1347–52. http://dx.doi.org/10.1016/s0273-1177(01)00410-0.

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Lidor, A., T. Fend, M. Roeb et C. Sattler. « Parametric investigation of a volumetric solar receiver-reactor ». Solar Energy 204 (juillet 2020) : 256–69. http://dx.doi.org/10.1016/j.solener.2020.04.045.

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Lau, Japheth Z. J., Victor N. S. Bong et Basil T. Wong. « Parametric investigation of nano-gap thermophotovoltaic energy conversion ». Journal of Quantitative Spectroscopy and Radiative Transfer 171 (mars 2016) : 39–49. http://dx.doi.org/10.1016/j.jqsrt.2015.11.023.

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Cluni, Federico, Vittorio Gusella et Filippo Ubertini. « A parametric investigation of wind-induced cable fatigue ». Engineering Structures 29, no 11 (novembre 2007) : 3094–105. http://dx.doi.org/10.1016/j.engstruct.2007.02.010.

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Lee, Jang-Chang, et Zvi Rusak. « Parametric investigation of nonadiabatic compressible flow around airfoils ». Physics of Fluids 13, no 1 (janvier 2001) : 315–23. http://dx.doi.org/10.1063/1.1327593.

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Hongjun, L., Z. Wei, C. Guofu, W. Yishan, C. Zhao et R. Chi. « Investigation of spectral bandwidth of optical parametric amplification ». Applied Physics B 79, no 5 (29 juin 2004) : 569–76. http://dx.doi.org/10.1007/s00340-004-1567-6.

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Szánya, T. « Theoretical investigation of thermal ion-exchange parametric pumping ». Reactive Polymers 17, no 1 (avril 1992) : 135. http://dx.doi.org/10.1016/0923-1137(92)90635-f.

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Bhatt, Dhruvi S., Vini Dadiala et Jayesh J. Barve. « Industrial Coal Pulverizer Model Simulation and Parametric Investigation ». IFAC-PapersOnLine 51, no 28 (2018) : 115–20. http://dx.doi.org/10.1016/j.ifacol.2018.11.687.

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Guan, Shing-Sheng, et M. Ronnier Luo. « Investigation of parametric effects using small colour differences ». Color Research & ; Application 24, no 5 (octobre 1999) : 331–43. http://dx.doi.org/10.1002/(sici)1520-6378(199910)24:5<331 ::aid-col5>3.0.co;2-9.

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Guan, Shing-Sheng, M. Ronnier et Luo. « Investigation of parametric effects using large colour differences ». Color Research & ; Application 24, no 5 (octobre 1999) : 356–68. http://dx.doi.org/10.1002/(sici)1520-6378(199910)24:5<356 ::aid-col7>3.0.co;2-n.

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Salman, Nassr N., et Mohsen A. Issa. « Calibration and parametric investigation of integral abutment bridges ». Engineering Structures 227 (janvier 2021) : 111381. http://dx.doi.org/10.1016/j.engstruct.2020.111381.

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Kalizan, Jan, et Jaka Tušek. « Caloric Micro-Cooling : Numerical modelling and parametric investigation ». Energy Conversion and Management 225 (décembre 2020) : 113421. http://dx.doi.org/10.1016/j.enconman.2020.113421.

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Bozorg Zadeh, Moein, et Mohammad Reza Zareei. « Investigation Parametric Rolling of Ships under Irregular Waves ». Journal of Marine Engineering 18, no 36 (1 décembre 2022) : 32–41. http://dx.doi.org/10.52547/marineeng.18.36.32.

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Francescutto, Alberto. « An Experimental Investigation of Parametric Rolling in Head Waves ». Journal of Offshore Mechanics and Arctic Engineering 123, no 2 (1 janvier 2001) : 65–69. http://dx.doi.org/10.1115/1.1355247.

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In this paper, the possibility of excitation of parametric rolling on a ship advancing in head sea condition is studied on an experimental basis. The excitation of parametric rolling was effectively observed in the experimental tests, together with some case of capsizing. The parametric rolling exhibited the typical subharmonic behavior. The use of classical Mathieu equation theory, coupled with hydrostatic calculations in longitudinal waves, accounting for both vertical motions and wave effect on stability, allows a satisfactory explanation of the observed phenomena. In addition, the problem of determination of roll damping dependence on ship speed was solved by using roll decay tests in calm water with forward speed. A simplified nonlinear modeling was proposed to account for the roll motion amplitude above threshold. The comparison with the experimental results is reasonably good.
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Agrawal, Devendra, Dinesh Kamble et Nitin Ambhore. « Parametric Investigation of Photochemical Machining of SS- 430 for Manufacturing of Micromesh ». Advanced Engineering Forum 43 (16 novembre 2021) : 1–16. http://dx.doi.org/10.4028/www.scientific.net/aef.43.1.

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Photochemical machining (PCM) is an emerging method for machining of very thin and difficult-to-cut material with complex geometrical profile. PCM is one of recommended method for machining of aerospace components, biomedical appliances, electronics part and decorative items. High corrosion resistance, better life, good appearance and strength recommend SS-430 as suitable material for various applications. In the current investigation, the parametric investigations of process parameters in photochemical machining for concentration and temperature of etchant, time of etching is done through ANOVA analysis. Grey Relational Analysis is performed to estimate the optimum machining parameters during PCM of SS-430. Formulation of mathematical model is done for prediction of results. Taguchi (L27) experimental array is used for Design of Experiments (DoE). The significance process parameters are estimated to govern the process with F-Values. Confirmatory test is conducted to observe the improvement in the responses. ANN predictive model is built up for investigation of error between predictive and experimental values. The obtained optimum set is used for manufacturing of micromesh typically used in smoke detector to safeguard human life.
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Shiukhy Soqanloo, S., S. Golshan et M. Khoshravesh. « Investigation of the Soil Depths Temperature Trend Using Parametric and Non-Parametric Methods (Shahrud Station) ». Journal of Water and Soil Science 22, no 4 (1 mars 2019) : 29–39. http://dx.doi.org/10.29252/jstnar.22.4.29.

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Sarkar, B. R., B. Doloi et B. Bhattacharyya. « Investigation on Electrochemical Discharge Micro-Machining of Silicon Carbide ». International Journal of Materials Forming and Machining Processes 4, no 2 (juillet 2017) : 29–44. http://dx.doi.org/10.4018/ijmfmp.2017070103.

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Electrochemical discharge machining (ECDM) process has great potential to machine hard, brittle and electrically non-conducting materials in micron range. The objective of this paper is to investigate into electrochemical discharge micro-machining on electrically semi-conductor type silicon carbide (SiC) material so as to study the effects of applied voltage, electrolyte concentration and inter-electrode gap on material removal rate (MRR) and radial overcut (ROC) of micro-drilled hole. Experiments were conducted based on L9 array of Taguchi method with stainless steel µ-tool of 300µm diameter using NaOH electrolyte. An attempt has been made to find out the single as well as multi-objective optimal parametric combinations for maximum MRR and minimum ROC. The single-objective parametric combinations were selected as 45V/20wt%/20mm and 25V/20wt%/40mm for maximum MRR and minimum ROC respectively whereas multi-objective optimal parametric combinations was found as 25V/20wt%/40mm. Further mathematical models have been developed between the above machining parameters and characteristics.
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E, Khodapanah. « Parametric Investigation of Wettability Alteration of Reservoir Rocks by Asphaltene Deposition : Experimental and Modeling Approaches ». Petroleum & ; Petrochemical Engineering Journal 4, no 1 (2020) : 1–8. http://dx.doi.org/10.23880/ppej-16000217.

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Rock wettability plays an important role in water flooding process as it controls fluid flow, oil recovery and distribution of residual oil in any oil reservoir. In this context, polar oil components such as asphaltene contents may adsorb onto the pore mineral surfaces and alter wettability of the reservoir rock. Due to this importance, this study aims to investigate the effects of different parameters such as concentration of asphaltene, salinity, temperature and time on the rock wettability alteration process. For this purpose, dynamic contact angle measurement was performed. The results showed that the increment of asphaltene concentration in the oleic phase changes the wettability of water-wet sandstone rock to oil-wet condition; the increase in the concentration of asphaltene fraction from 0.1 to 5.0 g/lit increased the contact angle from 0 to 97 degrees. In addition, the increase in the brine salinity from 500 to 8000 ppm increased the ability of asphaltene to adsorb on the rock surface and consequently, increased oil wetness; the equivalent contact angle changed from 0 to 113 degree for 5 g/lit asphaltene content after 192 hours. Moreover, the results illustrated that a rise in temperature from 40 to 70 o C accelerates adsorption of asphaltene, but it has not significant effect on the final contact angle. Furthermore, the Adaptive Neuro-Fuzzy Inference System (ANFIS) is incorporated into the Particle Swarm Optimization (PSO) algorithm to correlate contact angle with the aforementioned parameters. To this end, the obtained experimental data are used to train and test the algorithm. The outputs of ANFIS-PSO algorithm are compared with the measured contact angles in both graphical and statistical manners. The training and testing determination coefficients (R 2 ) have been obtained as 0.99091 and 0.98761, respectively. The analysis indicates that the predictive model can be used with a high degree of confidence to investigate the effect of different parameters on wettability alteration
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Obydenov, A. YU. « Parametric management of economic actor behaviour under bounded rationality ». Strategic decisions and risk management, no 4-5 (29 octobre 2017) : 58–67. http://dx.doi.org/10.17747/2078-8886-2017-4-5-58-67.

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The article explores parametric management of economic entity production volume within framework of weak and strong hypothesis of bounded rationality. The concept of parametric management with the example of economic entity behavior modeling under the conditions of bounded rationality is considered. The qualitative analysis of nonlinear kinetics differential equations is applied as the basic method of the investigation suggested. The investigation proves the possibility of parametric stimulation of economic entity production volume increasing by the means of: transfers, taxes, fixed prices depending on different conditions, such as the model of economic entity rationality, demand function, borrowing financial assets accessibility. The invariant instruments of parametric management for different models of economic actors strategic behavior are proposed. The managerial problems explored may be generalized for solving the coordination problem as a hole.
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Weber, Gerhard-W. « On the topology of parametric optimal control ». Journal of the Australian Mathematical Society. Series B. Applied Mathematics 39, no 4 (avril 1998) : 463–97. http://dx.doi.org/10.1017/s033427000000775x.

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AbstractWe will study one-parameter families of differentiable optimal control problems given by:Here, at given times t the inequality constraint functions are of semi-infinite nature, the objective functional may also be of max-type. For each s ∈ ℝ the problem is equivalent to a one-parameter family (Ps (t))t∈[a,b] of differentiable optimization problems. From these the consideration of generalized critical trajectories, such as a local minimum trajectory, comes into our investigation. According to a concept introduced by Hettich, Jongen and Stein in optimization, we distinguish eight types of generalized critical trajectories. Under suitable continuity, compactness and integrability assumptions, those problems, which exclusively have generalized critical points being of one of these eight types, are generic. We study normal forms and characteristic examples, locally around these trajectories.Moreover, we indicate the related concept of structural stability of optimal control problems due to the topological behaviour of the lower level sets under small data perturbations. Finally, we discuss the numerical consequences of our investigations for pathfollowing techniques with jumps.
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Heath, Christopher M. « Parametric Modeling Investigation for Radially Staged Low-Emission Combustion ». Journal of Propulsion and Power 32, no 2 (mars 2016) : 500–515. http://dx.doi.org/10.2514/1.b35867.

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Lapko, A. V., et V. A. Lapko. « Development and investigation of two-level non-parametric estimators ». Optoelectronics, Instrumentation and Data Processing 46, no 1 (février 2010) : 56–63. http://dx.doi.org/10.3103/s8756699010010073.

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Alaee, Pooya, Bing Li et Patrick P. C. Cheung. « Parametric investigation of 3D RC beam–column joint mechanics ». Magazine of Concrete Research 67, no 19 (octobre 2015) : 1054–69. http://dx.doi.org/10.1680/macr.15.00005.

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Huang, Shaopei, et Yujuan Lu. « Numerical Parametric Investigation of Nonaqueous Vanadium Redox Flow Batteries ». Batteries 8, no 8 (23 juillet 2022) : 75. http://dx.doi.org/10.3390/batteries8080075.

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Nonaqueous redox flow batteries are promising candidates for large-scale energy storage technologies. However, the effect of structural design and key factors limiting the performance are still not thoroughly understood. In this work, we constructed a physical model to study the effect of various design parameters on the performance of such a battery. It was found that the kinetics of redox reaction was improved with active material concentration and electrode surface area. The modeling results also showed that the local current density was much higher in the vicinity of membrane than near the current collector due to relatively low ionic conductivity of electrolytes. Furthermore, decreasing the electrode thickness and increasing the membrane conductivity both reduced the voltage loss associated with ohmic resistance, thereby resulting in improved battery performance. The obtained numerical simulation results would be helpful not only for understanding the physicochemical process in nonaqueous vanadium flow batteries but also for future structural optimization of these batteries.
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Li, Zhejian, Xianlong Wen, Yufeng Wen, Wensu Chen, Hong Hao, Yu Zhang et Ben Liu. « Crashworthiness analysis and parametric investigation on kirigami corrugated structures ». Thin-Walled Structures 181 (décembre 2022) : 110136. http://dx.doi.org/10.1016/j.tws.2022.110136.

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