Results 41 to 50 of about 123,651 (276)
Born-Oppenheimer approximation for an atom in constant magnetic fields
, 2015 We obtain a reduction scheme for the study of the quantum evolution of an atom in constant magnetic fields using the method developed by Martinez, Nenciu and Sordoni based on the construction of almost invariant subspace. In Martinez-Sordoni \cite{MaSo2}
Ashida, Sohei
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Robust Gridless Estimation of Angles and Delays for Full-Dimensional Wideband mmWave Channels
IEEE Open Journal of Signal Processing, 2023 In this paper, we consider robust channel estimation for a millimeter wave (mmWave) massive MIMO system with uniform planar arrays (UPA). For many gridless angle estimation methods of mmWave channels, the channel gains needs to be time-invariant during ...
Ting-Ming Yang, Yuan-Pei Lin
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Bounds on changes in Ritz values for a perturbed invariant subspace of a Hermitian matrix
, 2008 The Rayleigh-Ritz method is widely used for eigenvalue approximation. Given a matrix $X$ with columns that form an orthonormal basis for a subspace $\X$, and a Hermitian matrix $A$, the eigenvalues of $X^HAX$ are called Ritz values of $A$ with respect to
A. V. Knyazev +4 more
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Discrete-Time Exponentially Stabilizing Fuzzy Sliding Mode Control via Lyapunov’s Method
Advances in Fuzzy Systems, 2015 The exponentially stabilizing state feedback control algorithm is developed by Lyapunov’s second method leading to the variable structure system with chattering free sliding modes.
Radiša Ž. Jovanović +1 more
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Frontiers in Psychology, 2021 The brain-computer interface (BCI) interprets the physiological information of the human brain in the process of consciousness activity. It builds a direct information transmission channel between the brain and the outside world.
Tongguang Ni +3 more
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Sensors, 2018 In this paper, a three-dimensional (3D)-subspace-based azimuth angle, elevation angle, and range estimation method with auto-pairing is proposed for frequency-modulated continuous waveform (FMCW) radar with an L-shaped array.
HyungSoo Nam +3 more
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A new method for constructing invariant subspaces
Journal of Mathematical Analysis and Applications, 2007 The method of compatible sequences is introduced in order to produce non-trivial (closed) invariant subspaces of (bounded linear) operators. Also a topological tool is used which is new in the search of invariant subspaces: the extraction of continuous selections of lower semicontinuous set valued functions. The advantage of this method over previously
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Exciton Radiative Lifetimes in Hexagonal Diamond Ge and SixGe1–x Alloys
Advanced Optical Materials, EarlyView.Strong room‐temperature photoluminescence reported in hexagonal Ge conflicts with theory predicting a nearly dark band edge. First‐principles calculations of excitonic radiative lifetimes fill a key gap in this debate, showing that pristine hexagonal Ge remains intrinsically weakly emissive, while Si alloying only modestly shortens the lifetime and ...
Michele Re Fiorentin +2 more
wiley +1 more source
Multilayer Cascade Screening Strategy for Semi-Supervised Change Detection in Hyperspectral Images
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022 Change detection (CD) is an important application of remote sensing, which provides information about land cover changes on the Earth's surface.
Lian Liu +3 more
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Linear-Quadratic Mean Field Control: The Hamiltonian Matrix and Invariant Subspace Method [PDF]
2018 IEEE Conference on Decision and Control (CDC), 2018 This paper studies the existence and uniqueness of a solution to linear quadratic (LQ) mean field social optimization problems with uniform agents. We exploit a Hamiltonian matrix structure of the associated ordinary differential equation (ODE) system and apply a subspace decomposition method to find the solution.
Xiang Chen, Minyi Huang
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