Mining and evaluation of stressed soils: Stochastic aspects of empirical modelling approach

In this research paper, the effect of the material of electrodes at the nanometer scale was elucidated towards measuring the electron transport properties of a single molecular junction comprising of anthracenedithiol molecule (ADT) stringed to two semi-infinite metallic electrodes using Extended Huckle Theory (EHT)-based semi-empirical modelling approach. The electron transport parameters i.e., I–V curves, Conductance-Voltage curves and transmission spectrum were investigated through ADT molecule by buffering it between different electrodes composed of rhodium, palladium, nickel and copper, all from transition metals series, under finite bias voltages within Keldysh's non equilibrium green function formulism (NEGF). The simulated results revealed that the copper electrodes showed maximum conduction whereas palladium showed least. The maximum conductance of 0.82 G0 and 43 μA current was exhibited by copper and thus affirmed to be the most effective electrode at nanometre scale when compared with other electrodes viz. nickel, rhodium and palladium.

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Environmental dynamic fatigue crack propagation in high density polyethylene: an empirical modelling approach

International Journal of Fatigue ◽

10.1016/0142-1123(81)90042-6 ◽

1981 ◽

Vol 3 (1) ◽

pp. 3-8 ◽

Cited By ~ 4

Author(s):

H ELHAKEEM ◽

L CULVER

Keyword(s):

Fatigue Crack ◽

Crack Propagation ◽

Fatigue Crack Propagation ◽

High Density Polyethylene ◽

High Density ◽

Empirical Modelling ◽

Modelling Approach ◽

Dynamic Fatigue

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Rethinking Life-long Learning: The Empirical Modelling Approach

Sixth IEEE International Conference on Advanced Learning Technologies (ICALT'06) ◽

10.1109/icalt.2006.1652577 ◽

2006 ◽

Author(s):

M. Beynon ◽

A. Harfield

Keyword(s):

Empirical Modelling ◽

Life Long Learning ◽

Modelling Approach

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Review of a Semi-Empirical Modelling Approach for Cohesive Sediment Transport in River Systems

Water ◽

10.3390/w14020256 ◽

2022 ◽

Vol 14 (2) ◽

pp. 256

Author(s):

Bommanna G. Krishnappan

Keyword(s):

Shear Stress ◽

Sediment Transport ◽

Critical Shear Stress ◽

Cohesive Sediment ◽

River Systems ◽

Empirical Modelling ◽

Cohesive Sediment Transport ◽

Definition Of ◽

Semi Empirical ◽

Modelling Approach

In this paper, a review of a semi-empirical modelling approach for cohesive sediment transport in river systems is presented. The mathematical modelling of cohesive sediment transport is a challenge because of the number of governing parameters controlling the various transport processes involved in cohesive sediment, and hence a semi-empirical approach is a viable option. A semi-empirical model of cohesive sediment called the RIVFLOC model developed by Krishnappan is reviewed and the model parameters that need to be determined using a rotating circular flume are highlighted. The parameters that were determined using a rotating circular flume during the application of the RIVFLOC model to different river systems include the critical shear stress for erosion of the cohesive sediment, critical shear stress for deposition according to the definition of Partheniades, critical shear stress for deposition according to the definition of Krone, the cohesion parameter governing the flocculation of cohesive sediment and a set of empirical parameters that define the density of the floc in terms of the size of the flocs. An examination of the variability of these parameters shows the need for testing site-specific sediments using a rotating circular flume to achieve a reliable prediction of the RIVFLOC model. Application of the model to various river systems has highlighted the need for including the entrapment process in a cohesive sediment transport model.

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