599 research outputs found
Bethe Ansatz and the Spectral Theory of affine Lie algebra--valued connections II. The non simply--laced case
We assess the ODE/IM correspondence for the quantum -KdV model,
for a non-simply laced Lie algebra . This is done by studying a
meromorphic connection with values in the Langlands dual algebra of the affine
Lie algebra , and constructing the relevant -system
among subdominant solutions. We then use the -system to prove that the
generalized spectral determinants satisfy the Bethe Ansatz equations of the
quantum -KdV model. We also consider generalized Airy functions
for twisted Kac--Moody algebras and we construct new explicit solutions to the
Bethe Ansatz equations. The paper is a continuation of our previous work on the
ODE/IM correspondence for simply-laced Lie algebras.Comment: 37 pages, 1 figure. Continuation of arXiv:1501.07421. Minor change in
the title. New subsection 5.1 on the action of the Weyl group on the Bethe
Ansatz solution
Bethe Ansatz and the Spectral Theory of affine Lie algebra-valued connections I. The simply-laced case
We study the ODE/IM correspondence for ODE associated to -valued connections, for a simply-laced Lie algebra . We prove
that subdominant solutions to the ODE defined in different fundamental
representations satisfy a set of quadratic equations called -system. This
allows us to show that the generalized spectral determinants satisfy the Bethe
Ansatz equations.Comment: 27 pages, final and published version. Minor change in the titl
Reductions of the dispersionless 2D Toda hierarchy and their Hamiltonian structures
We study finite-dimensional reductions of the dispersionless 2D Toda
hierarchy showing that the consistency conditions for such reductions are given
by a system of radial Loewner equations. We then construct their Hamiltonian
structures, following an approach proposed by Ferapontov.Comment: 15 page
Global Sensitivity Methods for Design of Experiments in Lithium-ion Battery Context
Battery management systems may rely on mathematical models to provide higher
performance than standard charging protocols. Electrochemical models allow us
to capture the phenomena occurring inside a lithium-ion cell and therefore,
could be the best model choice. However, to be of practical value, they require
reliable model parameters. Uncertainty quantification and optimal experimental
design concepts are essential tools for identifying systems and estimating
parameters precisely. Approximation errors in uncertainty quantification result
in sub-optimal experimental designs and consequently, less-informative data,
and higher parameter unreliability. In this work, we propose a highly efficient
design of experiment method based on global parameter sensitivities. This novel
concept is applied to the single-particle model with electrolyte and thermal
dynamics (SPMeT), a well-known electrochemical model for lithium-ion cells. The
proposed method avoids the simplifying assumption of output-parameter
linearization (i.e., local parameter sensitivities) used in conventional Fisher
information matrix-based experimental design strategies. Thus, the optimized
current input profile results in experimental data of higher information
content and in turn, in more precise parameter estimates.Comment: Accepted for 21st IFAC World Congres
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