Results 101 to 110 of about 5,889,360 (355)
Positivity of convolution quadratures generated by nonconvex sequences
Comptes Rendus. MathématiqueThe positive definiteness of real quadratic forms of convolution type plays an important role in the stability analysis of time-stepping schemes for nonlocal models.
Karaa, Samir
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Automatic Gain Tuning of a Momentum Based Balancing Controller for Humanoid Robots
, 2016 This paper proposes a technique for automatic gain tuning of a momentum based balancing controller for humanoid robots. The controller ensures the stabilization of the centroidal dynamics and the associated zero dynamics.
Nava, Gabriele +2 more
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Advanced Biology, EarlyView.In vitro cancer models are advantageous for studying important processes such as tumorigenesis, cancer growth, invasion, and metastasis. The complexity and biological relevance increase depending on the model structure, organization, and composition of materials and cells.
Kyndra S. Higgins +2 more
wiley +1 more source
Abstract and Applied Analysis, 2013 We obtain a new Taylor's formula in terms of the order subdifferential of a function from to . As its applications in optimization problems, we build order sufficient optimality conditions of this kind of functions and order necessary conditions ...
He Qinghai, Zhang Binbin
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On the sign definiteness of Liapunov functionals and stability of a linear delay equation
Electronic Journal of Qualitative Theory of Differential Equations, 1998 In this paper we give a new definition of the positive-definiteness of the Liapunov functional involved in the stability and asymptotic stability investigation.
L. B. Knyazhishche, V. A. Scheglov
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Advanced Engineering Materials, EarlyView.This article examines how build orientation, thickness, and loading rate affect the tensile and compressive properties of LS‐manufactured polyamide 12 12 parts. Through over 120 experiments, it reveals strong ductility anisotropy in tension, minimal compressive sensitivity, and significant thickness and strain rate dependencies.
Andreas Psarros +2 more
wiley +1 more source
Experimental and Theoretical Confirmation of Covalent Bonding in α‐Pu
Advanced Functional Materials, EarlyView.From a combination of Reverse Monte Carlo dynamic rigid body fitting to the pair distribution functional and novel density functional approaches, the existence of covalent bonding is confirmed in α‐plutonium alongside other bonding types (i.e. mixed bonding schemes).
Alexander R. Muñoz +10 more
wiley +1 more source
Positive definiteness of Diffusion Kurtosis Imaging
, 2012 Diffusion Kurtosis Imaging (DKI) is a new Magnetic Resonance Imaging (MRI) model to characterize the non-Gaussian diffusion behavior in tissues. In reality, the term $bD_{app}-\frac{1}{6}b^2D_{app}^2K_{app}$ in the extended Stejskal and Tanner ...
Shenglong Hu +3 more
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Strictly Positive Definite Functions
Journal of Approximation Theory, 1996 A complex-valued continuous function defined on \(\mathbb{R}\) is said to be strictly positive definite on \(\mathbb{R}\) if the \(n\) by \(n\) matrix \((f(x_i- x_j))\) is positive definite for all choices of pairwise distinct points \(x_1,x_2,\dots,x_n\in\mathbb{R}\), and all \(n\geq 1\).
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On a property of positive-definite functions [PDF]
Bulletin of the American Mathematical Society, 1960 THEOREM. Let {h\ (k= ± 1 , ± 2 , • • • ) be a sequence of real numbers such that tk>0 and £_fc = —tkfor any k>0 and that h—»0 as k—> . Let f{t) be a positive-definite function of the real variable t and let yp{z) be a function of the complex variable z (z = t+ivy t and v both real) which is regular in a circle about the point 3 = 0.
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