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Published in Phillip A. Laplante, Dictionary of Computer Science, Engineering, and Technology, 2017
named parameter a parameter whose actual value is bound to its formal parameter by specifying its name, allowing parameters to be specified at the call site in any order convenient to the programmer. Often a named parameter mechanism is coupled to a default parameter mechanism by which the parameters that are not named are assigned specified (default) values. This mechanism is not in common use in most programming languages, but is often used in interactive languages, particularly command languages. See also command language, shell language. Compare with positional parameter.
Numerical investigation on effect of confining pressure on the dynamic deformation of sandstone
Published in European Journal of Environmental and Civil Engineering, 2020
Wei Yuan, Xiao Wang, Xi-Bo Wang
The numerical results are strongly related to the input parameters of particles and contact models. Therefore, to obtain real microscopic mechanical behaviours corresponding to that in macroscope, determination of micromechanical parameters of materials is an indispensable procedure before running simulation. The procedure of determining micromechanical parameters is commonly named parameter calibration. During this process, a large number of numerical simulation tests under similar conditions with laboratory experiments or field tests need to be carried out firstly. Then, the numerical results are compared with the experimental results. The microscopic parameters are adjusted repeatedly by ‘trial and error’ method (Castro-Filgueira et al., 2017; Du et al., 2020; Xu et al., 2016a) until the numerical results are consistent with those of experiments.
A degrading Bouc–Wen model for the hysteresis of reinforced concrete structural elements
Published in Structure and Infrastructure Engineering, 2020
Matteo Pelliciari, Bruno Briseghella, Francesco Tondolo, Luigi Veneziano, Camillo Nuti, Rita Greco, Davide Lavorato, Angelo Marcello Tarantino
The set of parameters is collected into a vector named parameter vector. The optimal parameter vector is denoted as and it is the one that minimises an objective function (OF), which is a measure of discrepancy between numerical and experimental response. For the model proposed in this work, the parameters variation is constrained by defining the lower bound and the upper bound
Parameter identification of degrading and pinched hysteretic systems using a modified Bouc–Wen model
Published in Structure and Infrastructure Engineering, 2018
Matteo Pelliciari, Giuseppe Carlo Marano, Tommaso Cuoghi, Bruno Briseghella, Davide Lavorato, Angelo Marcello Tarantino
The mathematical model presented in this work has a certain number of unknown parameters. Their values must be tuned using reliable data obtained from experimental activities (or literature), so that the simulated response of the system fits as well as possible the real one. This process is called identification, and it aims to evaluate the numerical values to be assigned to a vector collecting all the model parameters, named Parameter Vector (PV).