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On the hyperstability of time-varying blocks [PDF]

IEEE Transactions on Automatic Control, 1970
The hyperstability of linear time-varying discrete blocks is studied. Sufficient conditions for hyperstability are obtained for special classes of multiple and simple blocks.
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In Vitro Evolution of a Hyperstable Gβ1 Variant

Journal of Molecular Biology, 2006
An in-vitro selection strategy was used to obtain strongly stabilized variants of the beta1 domain of protein G (Gbeta1). In a two-step approach, first candidate positions with a high potential for stabilization were identified in Gbeta1 libraries that were created by error-prone PCR, and then, after randomization of these positions by saturation ...
Franz X. Schmid, Michael Wunderlich
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Engineering ancestral protein hyperstability

Biochemical Journal, 2016
Many experimental analyses and proposed scenarios support that ancient life was thermophilic. In congruence with this hypothesis, proteins encoded by reconstructed sequences corresponding to ancient phylogenetic nodes often display very high stability.
Beatriz Ibarra-Molero, Jose M. Sanchez-Ruiz, M. Luisa Romero-Romero, Valeria A. Risso, Sergio Martínez-Rodríguez   +4 more
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On generalized hyperstability of a general linear equation [PDF]

Acta Mathematica Hungarica, 2016
Let \({{\mathbb F}}\), \({{\mathbb K}}\) be two fields of real or complex numbers and X, Y be two normed spaces over \({{\mathbb F}}\), \({{\mathbb K}}\), respectively. In this paper, we use a modification of Brzdek’s method in [11] to obtain generalized hyperstability results for a general linear equation of the form $$g(ax + by) = Ag(x) + Bg(y),$$
Laddawan Aiemsomboon, Wutiphol Sintunavarat   +1 more
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Hyperstability and identification

1970 IEEE Symposium on Adaptive Processes (9th) Decision and Control, 1970
This paper considers the process identification by means an adjustable model. An approach to the synthesis of this type of on-line identification system via the hyperstability theory is proposed. Two typical situations for identification are considered (the "ideal case" and the "real case").
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Hyperstability and average hyperstability conditions for a broad class of gaussian stochastic systems

Information Sciences, 1979
Abstract The author investigates the hyperstability problem for a broad class of single-control stochastic systems which may be considered as disturbed models of given deterministic systems. The stochasticity comes from the control, which is disturbed by an additive Gaussian noise with its own gain.
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Hyperstability and adaptive filtering

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1981
Recently, results from the area of system identification concerning the concept of system hyperstability have been applied to the analysis of adaptive filtering configurations. In particular, this analysis tool has allowed the development of a family of convergent adaptive recursive digital filtering algorithms, where the use of conventional gradient ...
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Hyperstability of the Jensen functional equation

Acta Mathematica Hungarica, 2013
We present some observations on hyperstability for the Jensen equation on restricted domain. Namely, we show, under some weak natural assumptions, that functions satisfying the equation approximately (in some sense) must be actually solutions to it.
Anna Bahyrycz, Magdalena Piszczek
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Parameter optimized hyperstable controllers

[1991] Proceedings of the 30th IEEE Conference on Decision and Control, 2002
A parameterization of hyperstable linear time-invariant controllers is proposed, where the free parameters are to be determined by parameter optimization in order to meet various design requirements of the closed-loop system. The class of hyperstable controllers is of special importance since a control loop with hyperstable controller is guaranteed to ...
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A simplified viewpoint of hyperstability

IEEE Transactions on Automatic Control, 1968
The definition of a hyperstable system according to Popov is given a network theoretic interpretation, and proofs are presented outlining the connection between passive and hyperstable systems.
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