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One important use is in the analysis of control systems. One of the simplest characteristic units is the doubling time of a system experiencing exponential growth , or conversely the half-life of a system experiencing exponential decay ; a more natural pair of characteristic units is mean age/ mean lifetime , which correspond to base e rather ...
Scaling of Navier–Stokes equation refers to the process of selecting the proper spatial scales – for a certain type of flow – to be used in the non-dimensionalization of the equation. Since the resulting equations need to be dimensionless, a suitable combination of parameters and constants of the equations and flow (domain ...
This agrees with the nonlinear frequency changes found by employing the Lindstedt–Poincaré method. This new solution is valid until = (). Higher-order solutions – using the method of multiple scales – require the introduction of additional slow scales, i.e., t 2 = ε 2 t, t 3 = ε 3 t, etc.
In statistics, scale analysis is a set of methods to analyze survey data, in which responses to questions are combined to measure a latent variable. These items can ...
Analyse-it is a statistical analysis add-in for Microsoft Excel. Analyse-it is the successor to Astute, developed in 1992 for Excel 4 and the first statistical analysis add-in for Microsoft Excel. Analyse-it is the successor to Astute, developed in 1992 for Excel 4 and the first statistical analysis add-in for Microsoft Excel.
The Kerby method is similar to the Burgess method, but differs in two ways. First, while the Burgess method uses subjective judgment to select a cutoff score for a multi-valued predictor with a binary outcome, the Kerby method uses classification and regression tree analysis. In this way, the selection of the cutoff score is based not on ...
The development of MOOSE at Idaho National Laboratory (INL) since May 2008, has resulted in a unique approach to computational engineering that combines computer science with a strong underlying mathematical description in a unique way that allows scientists and engineers to develop engineering simulation tools in a fraction of the time previously required. [2]
For example, moisture content may be defined as a ratio of volumes (volumetric moisture, m 3 ⋅m −3, dimension L 3 ⋅L −3) or as a ratio of masses (gravimetric moisture, units kg⋅kg −1, dimension M⋅M −1); both would be unitless quantities, but of different dimension.