Results 121 to 130 of about 4,538,824 (321)
Sensors, 2019 Calderon’s method has been successfully used for the direct image reconstruction in electrical capacitance tomography. In the method, the truncation radius adopted in numerical integral greatly influences the reconstruction results.
Shijie Sun +4 more
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Strengthening of spectral radius, numerical radius, and Berezin radius inequalities
Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. MatemáticasSuppose $\mathcal{H}_1, \mathcal{H}_2, \ldots, \mathcal{H}_n$ are arbitrary complex Hilbert spaces, and ${\bf A}=[A_{ij}]$ is an $n\times n$ operator matrix with $A_{ij}\in \mathcal{B}(\mathcal{H}_j, \mathcal{H}_i).$ We show that $w({\bf A}) \leq w\left(\begin{bmatrix} a_{ij} \end{bmatrix}_{i,j=1}^n \right),$ where $w(\cdot)$ denotes the numerical ...
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Advanced Engineering Materials, EarlyView.The wettability of aluminum droplets (Al) on different copper substrates (Cu), where liquid Al spreads on solid Cu surfaces to form a liquid–solid interface, is studied numerically and experimentally. The experimental and numerical results show good agreement in the fast‐spreading regime.
Shan Lyu +8 more
wiley +1 more source
Cartesian decomposition and numerical radius inequalities
Linear Algebra and its Applications, 2015 8 pages, appeared in Linear Algebra ...
Kittaneh, Fuad +2 more
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Advanced Engineering Materials, EarlyView.New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold +2 more
wiley +1 more source
Calibration of Numerical Simulation Methods for Underwater Explosion with Centrifugal Tests
Shock and Vibration, 2019 The centrifugal underwater explosion tests and corresponding numerical simulations were carried out to study the laws of shock wave and bubble pulsation. A semiempirical method to determine JWL state equation parameters was given.
Qiusheng Wang, Shicong Liu, Haoran Lou
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Numerical Radius Perserving Operators on B(H) [PDF]
Proceedings of the American Mathematical Society, 1995 Summary: Let \(H\) be a Hilbert space over \(\mathbb{C}\) and let \(B(H)\) denote the vector space of all bounded linear operators on \(H\). We prove that a linear isomorphism \(T: B(H)\to B(H)\) is numerical radius-preserving if and only if it is a multiply of a \(C^*\)-isomorphism by a scalar of modulus one.
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Surface Tension Measurement of Ti‐6Al‐4V by Falling Droplet Method in Oxygen‐Free Atmosphere
Advanced Engineering Materials, EarlyView.In this article, the temperature‐dependent surface tension of free falling, oscillating Ti‐6Al‐4V droplets is investigated in both argon and monosilane doped, oxygen‐free atmosphere. Droplet temperature and oscillation are captured with one single high‐speed camera, and the surface tension is calculated with Rayleigh's formula.
Johannes May +9 more
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Hilbert–Schmidt-Type Radii of Operator Pairs
Journal of Function SpacesLet C2H be the Hilbert–Schmidt class on a complex separable Hilbert space H. In light of the recent definition of the weighted numerical radius and motivated by the definition of the Hilbert–Schmidt numerical radius of a pair of operators, we introduce ...
Bashar Mayyas, Mohammad Sababheh
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NEW NORM INEQUALITIES FOR COMMUTATORS OF HILBERT SPACE OPERATORS
Проблемы анализаNew norm inequalities for commutators of Hilbert space operators are given. Among other inequalities, it is shown that if $A, B \in \mathbb{B}(\mathbb{H})$ and there exists a real number $z_0$, such that $||A-z_0I|| = D_A$, then \[ ||AB \pm BA ...
B. Moosavi, M. Shah Hosseini
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