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Journal articles on the topic 'Saturation function'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 January 2023

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1

Jia, Lijie. "The processing of saturation function in saturation control system." IOP Conference Series: Materials Science and Engineering 631 (November 7, 2019): 052048. http://dx.doi.org/10.1088/1757-899x/631/5/052048.

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2

Carpenter, Chris. "Reconciling Log-Derived Water-Saturation and Saturation-Height Function Results." Journal of Petroleum Technology 68, no. 08 (2016): 65–66. http://dx.doi.org/10.2118/0816-0065-jpt.

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3

Diouf, C., A. Cros, S. Monfray, et al. "“Y function” method applied to saturation regime: Apparent saturation mobility and saturation velocity extraction." Solid-State Electronics 85 (July 2013): 12–14. http://dx.doi.org/10.1016/j.sse.2013.03.007.

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4

Afrough, Armin, Mehdi Bahari Moghaddam, Laura Romero-Zerón, and Bruce J. Balcom. "Exponential Capillary Pressure Functions in Sedimentary Rocks." E3S Web of Conferences 89 (2019): 02005. http://dx.doi.org/10.1051/e3sconf/20198902005.

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The Brooks-Corey power-law capillary pressure model is commonly imposed on core analysis data without verifying the validity of its underlying assumptions. The Brooks-Corey model, originally developed to model the pressure head during the drainage of soil, is only valid at low wetting phase saturations. However, such models are often applied in petroleum production simulations and may lead to erroneous recovery factors when the saturation range of interest is far from the end points. We demonstrate that exponential models work much better for capillary pressure compared to the Brooks-Corey mod

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Imbert, Jean-Pierre, Salih-Murat Egi, and Costantino Balestra. "Vascular Function Recovery Following Saturation Diving." Medicina 58, no. 10 (2022): 1476. http://dx.doi.org/10.3390/medicina58101476.

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Background and Objectives: Saturation diving is a technique used in commercial diving. Decompression sickness (DCS) was the main concern of saturation safety, but procedures have evolved over the last 50 years and DCS has become a rare event. New needs have evolved to evaluate the diving and decompression stress to improve the flexibility of the operations (minimum interval between dives, optimal oxygen levels, etc.). We monitored this stress in saturation divers during actual operations. Materials and Methods: The monitoring included the detection of vascular gas emboli (VGE) and the changes

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Zhou, Yingfang, Dimitrios Georgios Hatzignatiou, Johan Olav Helland, Yulong Zhao, and Jianchao Cai. "Pore-Scale Modelling of Three-Phase Capillary Pressure Curves Directly in Uniformly Wet Rock Images." Geofluids 2021 (January 5, 2021): 1–15. http://dx.doi.org/10.1155/2021/6622079.

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In this work, we developed a semianalytical model to compute three-phase capillary pressure curves and associated fluid configurations for gas invasion in uniformly wet rock images. The fluid configurations and favorable capillary entry pressures are determined based on free energy minimization by combining all physically allowed three-phase arc menisci. The model was first validated against analytical solutions developed in a star-shaped pore space and subsequently employed on an SEM image of Bentheim sandstone. The simulated fluid configurations show similar oil-layer behavior as previously

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Shen-Iuan Liu and Cheng-Chieh Chang. "Pseudo-exponential function for MOSFETs in saturation." IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing 47, no. 11 (2000): 1318–21. http://dx.doi.org/10.1109/82.885141.

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8

Barale, Cristina, Rouslan Senkeev, Franca Napoli, et al. "Transferrin Saturation Inversely Correlates with Platelet Function." Thrombosis and Haemostasis 119, no. 05 (2019): 766–78. http://dx.doi.org/10.1055/s-0039-1681061.

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Background The association between iron overload (IO) and risk of cardiovascular disease is controversial. Epidemiological studies have found a significant negative association of transferrin (Tf) saturation and cardiovascular events suggesting that higher body iron possibly confer a protective effect towards developing cardiovascular events. The biological mechanisms of this phenomenon are unknown. Objective This article investigates the role of IO on platelet reactivity. Materials and Methods This study was a prospective case–control study comparing 45 patients with IO, mostly characterized

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9

Paquet, Catherine, Pierre Couture, Michel Carrier, Jean-Claude Tardif, and André Y. Denault. "Cerebral oxygen saturation and left ventricular function." Canadian Journal of Anesthesia/Journal canadien d'anesthésie 53, no. 1 (2006): 26417. http://dx.doi.org/10.1007/bf03017020.

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10

Bohman, Tom, Maria Fonoberova, and Oleg Pikhurko. "The saturation function of complete partite graphs." Journal of Combinatorics 1, no. 2 (2010): 149–70. http://dx.doi.org/10.4310/joc.2010.v1.n2.a5.

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11

Vas, László M., Zoltán Gombos, Veronika Nagy, and Marianna Halász. "Tailored saturation functions and its application to liquid uptake processes in fibrous composite reinforcements." Journal of Industrial Textiles 52 (August 2022): 152808372211180. http://dx.doi.org/10.1177/15280837221118093.

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Saturation processes occur in almost every theoretical and practical field, e.g. liquid uptake within fibrous composite reinforcements. These processes require appropriate mathematical functions to model them and use them for design purposes. This includes assessing the saturation level, especially in microfluidic processes of fibrous composite reinforcements. This paper proposes a mathematical approach that uses a simple and well-known saturation function with modification through variable transformations and/or linear combinations. When the initial asymptotic behaviour is numerically known,

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12

Kimura, Eiji. "Effects of luminance level on the saturation function: Sensitivities based on saturation discrimination." Color Research & Application 16, no. 5 (1991): 289–96. http://dx.doi.org/10.1002/col.5080160504.

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13

Ghedan, Shawket G., Bertrand M. Thiebot, and Douglas A. Boyd. "Modeling Original Water Saturation in the Transition Zone of a Carbonate Oil Reservoir." SPE Reservoir Evaluation & Engineering 9, no. 06 (2006): 681–87. http://dx.doi.org/10.2118/88756-pa.

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Summary Accurately modeling water-saturation variation in transition zones is important to reservoir simulation for predicting recoverable oil and guiding field-development plans. The large transition zone of a heterogeneous Middle East reservoir was challenging to model. Core-calibrated, log-derived water saturations were used to generate saturation-height-function groups for nine reservoir-rock types. To match the large span of log water saturation (Sw) in the transition zone from the free-water level (FWL) to minimum Sw high in the oil column, three saturation-height functions per rock type

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14

Rincón, Alejandro, Fredy E. Hoyos, and John E. Candelo-Becerra. "Conditioned Adaptive Control for an Uncertain Bioreactor with Input Saturation and Steep Settling Desired Output." Symmetry 14, no. 6 (2022): 1232. http://dx.doi.org/10.3390/sym14061232.

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In this work, a controller is developed for a continuous bioreactor with an unknown reaction rate term, subject to input saturation. The substrate concentration and the dilution rate are chosen as output and input, respectively. The controller formulation and the stability analysis are performed by the theory of dead zone Lyapunov functions, Lyapunov stability, and model reference adaptive control. As the main results, the dynamics of the Lyapunov function is determined separately for saturation and non-saturation events, and then a unified expression is deduced. In addition, the asymptotic co

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15

Al-Bulushi, N., P. R. King, M. J. Blunt, and M. Kraaijveld. "Generating a capillary saturation-height function to predict hydrocarbon saturation using artificial neural networks." Petroleum Geoscience 16, no. 1 (2010): 77–85. http://dx.doi.org/10.1144/1354-079309-824.

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16

Lv, Ensheng. "Chua’s Circuit Simulation Experiment Based on Saturation Function." Journal of Physics: Conference Series 2078, no. 1 (2021): 012026. http://dx.doi.org/10.1088/1742-6596/2078/1/012026.

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Abstract This paper designs a Chua's diode circuit based on saturation function. It uses Matlab/Simulink to model Chua's circuit, and simulates and analyzes the dynamic behavior of chaos, the model simply generates efficient chaotic signals, and intuitively displays processes of the chaotic attractor, chaotic synchronization, period doubling and the road to chaos through the virtual oscilloscope, which is conducive to chaotic beginners' understanding of the basic characteristics and application of chaos. The electrical and mathematical analysis of the instrument is carried out by simulation, t

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17

Wu, Wei, and Suhada Jayasuriya. "Design of Feedback Systems With Plant Input Rate Saturation via QFT Approach." Journal of Dynamic Systems, Measurement, and Control 128, no. 3 (2005): 701–5. http://dx.doi.org/10.1115/1.2232693.

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In this paper, a synthesis approach for input rate saturation compensation of feedback systems is presented. Uncertain, stable plants of type greater than or equal to 1 are considered. Based on Horowitz’s original design for input amplitude saturation (Horowitz, I., 1983) and extensions developed in (Wu, W., and Jayasuriya, S., 1999; Wu, W., and Jayasuriya, S., 2001; Wu, W., 2000) an independent loop around the rate saturating element is introduced for saturation compensation by means of the third DOF (degree of freedom) saturation compensator, H(s). First, the structure of the additional loop

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18

Hassaneen, Khaled S. A. "Self-Consistent Green Function Method in Nuclear Matter." Physics Research International 2013 (July 16, 2013): 1–6. http://dx.doi.org/10.1155/2013/415605.

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Symmetric nuclear matter is studied within the Brueckner-Hartree-Fock (BHF) approach and is extending to the self-consistent Green’s function (SCGF) approach. Both approximations are based on realistic nucleon-nucleon interaction; that is, CD-Bonn potential is chosen. The single-particle energy and the equation of state (EOS) are studied. The Fermi energy at the saturation point fulfills the Hugenholtz-Van Hove theorem. In comparison to the BHF approach, the binding energy is reduced and the EOS is stiffer. Both the SCGF and BHF approaches do not reproduce the correct saturation point. A simpl

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19

Lieth, J. H., P. R. Fisher, and R. D. Heins. "A Three-phase Model for the Analysis of Sigmoid Patterns of Growth." HortScience 30, no. 4 (1995): 761C—761. http://dx.doi.org/10.21273/hortsci.30.4.761c.

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A growth function was developed for describing the progression of shoot elongation over time. While existing functions, such as the logistic function or Richards function, can be fitted to most sigmoid data, we observed situations where distinct lag, linear, and saturation phases were observed but not well represented by these traditional functions. A function was developed that explicitly models three phases of growth as a curvilinear (exponential) phase, followed by a linear phase, and terminating in a saturation phase. This function was found to be as flexible as the Richards function and c

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20

Ruiz, Adrián, Damiano Rotondo, and Bernardo Morcego. "Design of State-Feedback Controllers for Linear Parameter Varying Systems Subject to Time-Varying Input Saturation." Applied Sciences 9, no. 17 (2019): 3606. http://dx.doi.org/10.3390/app9173606.

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All real-world systems are affected by the saturation phenomenon due to inherent physical limitations of actuators. These limitations should be taken into account in the controller’s design to prevent a possibly severe deterioration of the system’s performance, and may even lead to instability of the closed-loop system. Contrarily to most of the control strategies, which assume that the saturation limits are constant in time, this paper considers the problem of designing a state-feedback controller for a system affected by time-varying saturation limits with the objective to improve the perfor

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21

Cao, Yong-Yan, and Zongli Lin. "Stability analysis of discrete-time systems with actuator saturation by a saturation-dependent Lyapunov function." Automatica 39, no. 7 (2003): 1235–41. http://dx.doi.org/10.1016/s0005-1098(03)00072-4.

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22

Yang, Hongjiu, Zhiwei Li, Changchun Hua, and Zhixin Liu. "Stability Analysis of Delta Operator Systems with Actuator Saturation by a Saturation-Dependent Lyapunov Function." Circuits, Systems, and Signal Processing 34, no. 3 (2014): 971–86. http://dx.doi.org/10.1007/s00034-014-9876-4.

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23

Park, Yeong Mog, Seboong Oh, Inchul Jin, and Kyun Kwon Oh. "On the Improvement of Hydraulic Conductivity Function in Van Genuchten-Mualem Model." Applied Mechanics and Materials 513-517 (February 2014): 4417–20. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.4417.

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Hydraulic conductivity (HC) is deduced indirectly from soil water retention curves (SWRC) by Mualem model, but the mathematical calculation in the Mualem model is sensitive to integration interval near saturation. After the van Genuchten model fit actual SWRC, the van Genuchten-Mualem (VGM) HC is integrated simply by an analytical function for unsaturated soils. However the analytical solution on VGM HC results in the rapid change of HC near saturation. For unsaturated soils sampled in Korea, SWRCs and unsaturated HCs were obtained by experiments. The HC experiments were compared with the HC m

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24

Eatock, R. A., T. F. Weiss, and K. L. Otto. "Dependence of discharge rate on sound pressure level in cochlear nerve fibers of the alligator lizard: implications for cochlear mechanisms." Journal of Neurophysiology 65, no. 6 (1991): 1580–97. http://dx.doi.org/10.1152/jn.1991.65.6.1580.

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1. Rate-level functions for individual cochlear nerve fibers of the alligator lizard, Gerrhonotus multicarinatus, were generated by measuring a fiber's driven discharge rate (the difference between the average discharge rates in the presence and absence of a tone burst) as a function of sound pressure level. 2. When plotted in double logarithmic coordinates, the rate-level function approaches a straight line at low sound pressure levels and saturates at high levels. Thus the rate-level function is a saturating power function of sound pressure. We developed an algorithm to estimate the exponent

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25

Guo, Xiaoyu, Mei Liu, Qinglin Zhao, Bin Hu, Huiyan Lu, and Long Jin. "Saturation-allowed zeroing neural networks activated by various functions for time-varying quadratic programming." Filomat 34, no. 15 (2020): 5149–57. http://dx.doi.org/10.2298/fil2015149g.

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Zeroing neural networks (ZNN) approach, has been presented to solve a lot of time-varying problems activated by monotonically increasing functions. However, the existing ZNN models for timevarying quadratic programming based on ZNN approach may be different from each other in structures, but share two common restrictions, i.e., the function must be convex and unbounded. In order to relax the above restrictions in solving time-varying quadratic programming (TVQP) problems, this paper proposes a saturation-allowed zeroing neural networks (SAZNN) model based on the ZNN approach. Comparing with ex

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26

Gutiérrez-Frías, Octavio, Norma Lozada-Castillo, J. Alejandro Aguirre-Anaya, and Diego A. Flores-Hernández. "Nested Saturation Function Control of a Magnetic Levitation System." Complexity 2020 (April 29, 2020): 1–9. http://dx.doi.org/10.1155/2020/3545374.

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The trajectory tracking task of a magnetic levitation system connected to a beam mechanism is solved by means of a nested saturation control with a feedforward term. The flatness property of the system allows to use the nested saturation control technique and the feedforward control to stabilize the output tracking error around the equilibrium. The closed-loop error dynamics is proven to be locally exponentially stable. Numerical simulations prove the effectiveness of the proposal.

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27

Otter, E. L. "Write saturation current as a function of tape magnetization." IEEE Transactions on Magnetics 24, no. 6 (1988): 2485–87. http://dx.doi.org/10.1109/20.92149.

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28

Thorsen, E., K. Segadal, and B. K. Kambestad. "Mechanisms of reduced pulmonary function after a saturation dive." European Respiratory Journal 7, no. 1 (1994): 4–10. http://dx.doi.org/10.1183/09031936.94.07010004.

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29

Schaback, Robert, and Holger Wendland. "Inverse and saturation theorems for radial basis function interpolation." Mathematics of Computation 71, no. 238 (2001): 669–82. http://dx.doi.org/10.1090/s0025-5718-01-01383-7.

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30

HAMDI, Q. A., D. HARRIS, and J. A. CLARK. "Saturation Deficit, Canopy Formation and Function inSorghum bicolor(L.)." Journal of Experimental Botany 38, no. 8 (1987): 1272–83. http://dx.doi.org/10.1093/jxb/38.8.1272.

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31

Toms-Stewart, Julianna, Tobias M. Müller, Boris Gurevich, and Lincoln Paterson. "Statistical characterization of gas-patch distributions in partially saturated rocks." GEOPHYSICS 74, no. 2 (2009): WA51—WA64. http://dx.doi.org/10.1190/1.3073007.

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Reservoir rocks are often saturated by two or more fluid phases forming complex patterns on all length scales. The objective of this work is to quantify the geometry of fluid phase distribution in partially saturated porous rocks using statistical methods and to model the associated acoustic signatures. Based on X-ray tomographic images at submillimeter resolution obtained during a gas-injection experiment, the spatial distribution of the gas phase in initially water-saturated limestone samples are constructed. Maps of the continuous variation of the percentage of gas saturation are computed a

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32

Patel, Pooja, and Sweety Shah. "A Comparison of Effect of Semi Fowler’s and Side Lying Position on Pulmonary Functions and Oxygen Saturation in Bedridden Patients." International Journal of Health Sciences and Research 11, no. 5 (2021): 53–57. http://dx.doi.org/10.52403/ijhsr.20210507.

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Background: Body positioning is prescribed to optimize cardiopulmonary functions. Positioning helps to improve lung function and oxygen saturation in patients who are bedridden for longer duration. The aim of the present study is comparing semi fowler’s position to side lying position (right and left side lying). Method: Thirty bedridden subjects who were haemodynamically stable were included in the study. Out of them three groups were made in which first group was given semi fowler’s position, second group was given left side lying and third group was given right side lying position. Patients

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33

Biondini, A. R., M. L. F. de Mattiello, and V. Spinadell. "Comparative Analysis of Brightness and Lightness Functions." Perception 26, no. 1_suppl (1997): 88. http://dx.doi.org/10.1068/v970063.

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A study is reported of twelve chromatic functions and one achromatic function of brightness, and fourteen chromatic functions and one achromatic function of lightness with the aim of establishing the change in the exponent of the functions, a phenomenon considered as being related to: (a) the brightness or lightness response of a subject; (b) the influence of hue and saturation; (c) the level of the background surrounding the stimulus; (d) the Helmholtz - Kohlrausch effect. Different authors agree that these differences are produced by specific contributions of the tristimulus value Y and of c

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34

Yao, Hejun. "Anti-Saturation Control of Uncertain Time-Delay Systems with Actuator Saturation Constraints." Symmetry 11, no. 3 (2019): 375. http://dx.doi.org/10.3390/sym11030375.

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The problem of anti-saturation control for a class of time-delay systems with actuator saturation is considered in this paper. By introducing appropriate variable substitution, a new delay time-delay systems model with actuator saturation systems is established. Based on the Lyapunov stability theory, the stability condition and the anti-saturation controller design method are obtained by using the linear matrix inequality approach. By introducing the matrix into the Lyapunov function, the proposed conditions are less conservative than the previous results. Finally, a simulation example shows

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35

Zhang, Jinqing, and Renfeng Yang. "A further study on Welge equation." Energy Exploration & Exploitation 36, no. 5 (2018): 1103–13. http://dx.doi.org/10.1177/0144598717751926.

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Buckley–Leverett theory and Welge equation is one of the most widely used methods for predicting fluid transport in porous media. However, the average water saturation in Welge equation is a function of both water saturation and water cut, which is inconvenient to be used. While the linear relationship (the slope is 2/3) of the average water saturation and outlet water saturation proposed by Зфрос provides a simple method the oil–water viscosity ratio greatly limits the application. In this paper, based on the analytical relative permeability model and Welge equation, a new average water satur

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36

Filippi, Bert, Bahman Joodi, and Mohammad Sarmadivaleh. "Developing a reliable height function from the J-Leverett parameters to populate water saturation: a case study." APPEA Journal 55, no. 1 (2015): 291. http://dx.doi.org/10.1071/aj14023.

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Populating water saturation is a critical step in dynamic modelling. This work introduces a different height function that equates directly with the Leverett-J formula. In doing so, the model initialises under quiescent conditions without the need for end-point scaling. The resulting water saturation is a function of permeability, porosity, clay volume and height above the free water level. The Vcl—or clay content—is an important feature in this formulation because it compensates between extreme values of permeability and porosity. This peer-reviewed paper describes how a single height functio

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37

Gao, Zhi, Zhihao Zhu, and Yu Guo. "Distributed Finite-Time Coordinated Attitude Tracking Control for Multiple Spacecraft with Actuator Saturation." Journal of Circuits, Systems and Computers 29, no. 13 (2020): 2050212. http://dx.doi.org/10.1142/s0218126620502126.

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For multi-spacecraft with actuator saturation, inertia uncertainties and external disturbances, a distributed finite-time coordinated attitude tracking control problem for the spacecraft with the communication topology containing fewer information paths is investigated. Aiming at reducing the communication path, a class of distributed finite-time state observers is designed. To speed up the convergence rate of the multiple spacecraft system, a fast nonsingular terminal sliding mode function is proposed. Moreover, an adaptive control term is proposed to suppress the impact of the external state

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38

Zhou, Y., J. O. Helland, and D. G. Hatzignatiou. "Computation of Three-Phase Capillary Pressure Curves and Fluid Configurations at Mixed-Wet Conditions in 2D Rock Images." SPE Journal 21, no. 01 (2016): 152–69. http://dx.doi.org/10.2118/170883-pa.

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Summary In this study, we present a three-phase, mixed-wet capillary bundle model with cross sections obtained from a segmented 2D rock image, and apply it to simulate gas-invasion processes directly on images of Bentheim sandstone after two-phase saturation histories consisting of primary drainage, wettability alteration, and imbibition. We calculate three-phase capillary pressure curves, corresponding fluid configurations, and saturation paths for the gas-invasion processes and study the effects of mixed wettability and saturation history by varying the initial water saturation after primary

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39

Namdar Zanganeh, M., S. I. I. Kam, T. C. C. LaForce, and W. R. R. Rossen. "The Method of Characteristics Applied to Oil Displacement by Foam." SPE Journal 16, no. 01 (2010): 8–23. http://dx.doi.org/10.2118/121580-pa.

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Summary Solutions obtained by the method of characteristics (MOC) provide key insights into complex foam enhanced-oil-recovery (EOR) displacements and the simulators that represent them. Most applications of the MOC to foam have excluded oil. We extend the MOC to foam flow with oil, where foam is weakened or destroyed by oil saturations above a critical oil saturation and/or weakened or destroyed at low water saturations, as seen in experiments and represented in foam simulators. Simulators account for the effects of oil and capillary pressure on foam using algorithms that bring foam strength

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40

Kazemiroodsari, Hadi, Mishac K. Yegian, Akram N. Alshawabkeh, and Seda Gokyer. "Electric Conductivity Probes to Study Change in Degree of Saturation - Bench Top Laboratory Tests." E3S Web of Conferences 195 (2020): 03016. http://dx.doi.org/10.1051/e3sconf/202019503016.

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Sand characteristics such as liquefaction susceptibility can be affected as a result of change in degree of saturation of sand. New liquefaction mitigation technique by inducing partial saturation in sands is introduced by Yegian et al in 2007[1]. This technique requires to monitor changes in degree of saturation of sand. By nature, changes in degree of saturation of sand can lead in changes in its electric conductivity. Electric conductivity is the property of a material that represents its ability to conduct electric current. Fully saturated sand can conduct electric current better than sand

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41

Hauptman, J. G., G. K. DeJong, K. A. Blasko, and I. H. Chaudry. "Measurement of hepatocellular function, cardiac output, effective blood volume, and oxygen saturation in rats." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 257, no. 2 (1989): R439—R444. http://dx.doi.org/10.1152/ajpregu.1989.257.2.r439.

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The available techniques do not permit the measurement of hepatocellular function, cardiac output, effective blood volume, and oxygen saturation in small animals without the need of blood or tissue sampling. We present methodology that permits us to measure the above variables in the rat. Multiple doses of indocyanine green (ICG; 0.16-2.6 mg/kg) were given to pentobarbital-anesthetized rats, and [ICG] was continuously measured by an in vivo hemoreflectometer. Initial velocity of clearance (Vo) was determined from the [ICG] vs. time plot for each dose by nonlinear regression. The maximal veloci

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42

TARINGOO, F., J. POSHTAN, and M. H. KAHAEI. "EFFECT OF SECONDARY PATH NONLINEARITY IN ACTIVE NOISE CONTROL SYSTEMS BEHAVIOR." Fluctuation and Noise Letters 05, no. 02 (2005): L143—L151. http://dx.doi.org/10.1142/s0219477505002501.

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In this paper the behavior of an active noise control system is analyzed considering the nonlinearity of the secondary path transfer function. This nonlinearity may be due to actuator saturation in the operating condition. The statistical solution of the filter weighs adaptation and convergence behavior are obtained. It is shown that the degree of nonlinearity and the error estimation of secondary path transfer function can affect the transient and steady state behavior. The saturation function is considered as a nonlinear system in adaptive filter output. This function models saturation effec

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Han, De‐hua, and Michael L. Batzle. "Gassmann's equation and fluid‐saturation effects on seismic velocities." GEOPHYSICS 69, no. 2 (2004): 398–405. http://dx.doi.org/10.1190/1.1707059.

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Gassmann's (1951) equations commonly are used to predict velocity changes resulting from different pore‐fluid saturations. However, the input parameters are often crudely estimated, and the resulting estimates of fluid effects can be unrealistic. In rocks, parameters such as porosity, density, and velocity are not independent, and values must be kept consistent and constrained. Otherwise, estimating fluid substitution can result in substantial errors. We recast the Gassmann's relations in terms of a porosity‐dependent normalized modulus Kn and the fluid sensitivity in terms of a simplified gai

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44

Zhang, Feixia, G. Ward Wilson, and D. G. Fredlund. "Permeability function for oil sands tailings undergoing volume change during drying." Canadian Geotechnical Journal 55, no. 2 (2018): 191–207. http://dx.doi.org/10.1139/cgj-2016-0486.

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The coefficient of permeability function is an important unsaturated soil property required when modeling seepage and contaminant transport phenomena. Inaccuracies in the estimation of the permeability function can lead to significant errors in numerical modeling results. Changes in void ratio and degree of saturation are factors that influence the permeability function. Presently available methodologies for estimating the unsaturated permeability function make the assumption that there is no volume change as soil suction is changed. As a result, volume changes are interpreted as changes in de

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Simatupang, Minson, Romy Suryaningrat Edwin, Sulha, Wayan Mustika, Heriansyah Putra, and Dede Heri Yuli Yanto. "Splitting Tensile Strength of Fly Ash-Modified Sand at Various Saturations and Curing Times." Infrastructures 7, no. 10 (2022): 126. http://dx.doi.org/10.3390/infrastructures7100126.

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Currently, a soil stabilization approach using fly ash as an effective choice for increasing soil stiffness and strength has emerged. With the presence of water, the lime in the fly ash would be separated, generating cementitious materials binding the grains of sand. In the present study, the influence of curing time and saturation during specimen preparation on the behavior of fly ash-modified sand was observed by performing a series of splitting tensile strength tests. It was found that the splitting tensile strength increases with fly ash content and curing time and decreases with saturatio

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Lian, Peiqing, Cuiyu Ma, Bingyu Ji, Taizhong Duan, and Xuequn Tan. "Numerical Simulation Modeling of Carbonate Reservoir Based on Rock Type." Journal of Engineering 2017 (November 1, 2017): 1–6. http://dx.doi.org/10.1155/2017/6987265.

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There are many types of carbonate reservoir rock spaces with complex shapes, and their primary pore structure changes dramatically. In order to describe the heterogeneity of K carbonate reservoir, equations of porosity, permeability and pore throat radii under different mercury injection saturations are fitted, and it shows that 30% is the best percentile. R30 method is presented for rock typing, and six rock types are divided according to R30 value of plugs. The porosity-permeability relationship is established for each rock type, and their relevant flow characteristics of each rock type have

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Nishimura, G., and M. Kinjo. "Distortion of the fluorescence correlation function-saturation of the fluorescence." Seibutsu Butsuri 41, supplement (2001): S90. http://dx.doi.org/10.2142/biophys.41.s90_2.

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Thorsen, E., K. Segadal, E. Myrseth, A. Pasche, and A. Gulsvik. "Pulmonary mechanical function and diffusion capacity after deep saturation dives." Occupational and Environmental Medicine 47, no. 4 (1990): 242–47. http://dx.doi.org/10.1136/oem.47.4.242.

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Flores, J. C. "Phase-coherence time saturation in mesoscopic systems: Wave-function collapse." Physical Review B 62, no. 24 (2000): R16291—R16293. http://dx.doi.org/10.1103/physrevb.62.r16291.

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Robinson, J. W., and T. S. Randhawa. "Saturation Throughput Analysis of IEEE 802.11e Enhanced Distributed Coordination Function." IEEE Journal on Selected Areas in Communications 22, no. 5 (2004): 917–28. http://dx.doi.org/10.1109/jsac.2004.826929.

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