Search Results - subject:"Linearisation"

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Evaluation of the Fisher information matrix in nonlinear mixed effect models using adaptive Gaussian quadrature

Nguyen, Thu Thuy; Mentré, France - In: Computational Statistics & Data Analysis 80 (2014) C, pp. 57-69

. Presently, MF in NLMEM is mostly evaluated with first-order linearisation. The adequacy of this approximation is, however …, influenced by model nonlinearity. Alternatives for the evaluation of MF without linearisation are proposed, based on Gaussian …. Their relevance was compared with clinical trial simulation and linearisation, using dose–response models, with various …

Persistent link: https://www.econbiz.de/10010906914

Piecewise linear approximations for the static-dynamic uncertainty strategy in stochastic lot-sizing

Rossi, Roberto; Kilic, Onur A.; Tarim, S. Armagan - In: Omega : the international journal of management science 50 (2015) 1, pp. 126-140

Persistent link: https://www.econbiz.de/10010422738

Robust STATCOM control for the stabilisation of fixed-speed wind turbines during low voltages

Hossain, M.J.; Pota, H.R.; Ramos, R.A. - In: Renewable Energy 36 (2011) 11, pp. 2897-2905

This paper presents a robust voltage control scheme for fixed-speed wind generators using a static synchronous compensator (STATCOM) controller. To enable a linear and robust control framework with structured uncertainty, the overall system is represented by a linear part plus a nonlinear part...

Persistent link: https://www.econbiz.de/10010804163

Classification of potential symmetries of generalised inhomogeneous nonlinear diffusion equations

Sophocleous, Christodoulos - In: Physica A: Statistical Mechanics and its Applications 320 (2003) C, pp. 169-183

We consider the class of generalised nonlinear diffusion equations f(x)ut=[g(x)unux]x which are of considerable interest in mathematical physics. We classify the nonlocal symmetries, which are known as potential symmetries, for these equations. It turns out that potential symmetries exist only...

Persistent link: https://www.econbiz.de/10011064451

Special solutions of discrete Painlevé equations through direct linearisation

Tamizhmani, T; Grammaticos, B; Tamizhmani, K.M; Ramani, A - In: Physica A: Statistical Mechanics and its Applications 315 (2002) 3, pp. 569-582

We study the special solutions of discrete Painlevé equations which can be expressed through the discrete equivalent of quadratures. The discrete Painlevé equations examined are the ones which appear in the classification based on affine Weyl groups and which can be written as a system of two...

Persistent link: https://www.econbiz.de/10010589012