Auteur Ning Lu
Documents disponibles écrits par cet auteur (11)
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Jeremy Lechman, Auteur ; Ning Lu, Auteur |Capillary force and water retention between two uneven-sized spherical particles are investigated. Previous studies have been limited to systems with even-sized particles. The appropriate definition of the boundary value problem for a water lens[...]
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Michael S. Morse, Auteur ; Ning Lu, Auteur ; Jonathan W. Godt, Auteur |Accurate estimation of the soil thickness distribution in steepland drainage basins is essential for understanding ecosystem and subsurface response to infiltration. One important aspect of this characterization is assessing the heavy and antece[...]
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Ning Lu, Auteur ; Jeremy Lechman, Auteur ; Kelly T. Miller, Auteur |The recently established theoretical results of the solid-water characteristic curve (SWCC) and capillary force characteristic curve (CFCC) are experimentally verified for mechanical and hydrologic interaction between uneven-sized spherical part[...]
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Ning Lu, Auteur ; Xiong Wang, Auteur |The signed digraph (SDG) method for fault diagnosis, which is one of the model-based methods, has been widely applied in the chemical industry in recent years. However, how to elicit appropriate thresholds for SDG is a very difficult problem. Th[...]
Article : texte imprimé
Likos, William J., Auteur ; Ning Lu, Auteur ; Manzari, Madjid T., Éditeur scientifique |Constitutive relationships among water content, matric suction, and capillary stress in unsaturated granular soils are modeled using a theoretical approach based on the changing geometry of interparticle pore water menisci. A series of equations[...]
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Jeremy Lechman, Auteur ; Ning Lu, Auteur ; Wu, David ; Ooi, J. Y., Éditeur scientifique |The dependences of matric suction and capillary stress on the degree of saturation in monodisperse disk-shaped particles are established for the full range of the degree of saturation. A thermodynamic free energy approach is employed to obtain b[...]
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Ning Lu, Auteur ; Murat Kaya, Auteur ; Brian D. Collins, Auteur |Laboratory tests to examine hysteresis in the hydrologic and mechanical properties of partially saturated soils were conducted on six intact specimens collected from a landslide-prone area of Alameda County, California. The results reveal that t[...]
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Ning Lu, Auteur ; Zhihua Xiong, Auteur ; Xiong Wang, Auteur |An integrated implementation solution and theoretical framework of fault diagnosis approach based on probabilistic signed digraph (PSDG) is proposed and applied to a gas fractionation unit. On the basis of the primary method of PSDG presented in[...]
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Ning Lu, Auteur |The writer attempts to clarify and address two fundamental questions regarding the appropriate use of matric suction in unsaturated soil mechanics: Is matric suction a stress variable? and Is matric suction a stress state variable? These questio[...]
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Seboong Oh, Auteur ; Ning Lu, Auteur ; Yun Ki Kim, Auteur |The part of effective stress resulting from soil moisture or soil suction variation can be defined by the suction stress characteristic curve (SSCC). For a given soil, the SSCC can be experimentally determined from shear-strength tests. Recent w[...]
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Ning Lu, Auteur ; Kim, Tae-Hyung, Auteur ; Sture, Stein, Auteur |A theory that accurately describes tensile strength of wet sand is presented. A closed form expression for tensile strength unifies tensile strength characteristics in all three water retention regimes: pendular, funicular, and capillary. Tensil[...]
