Manifold Gradient Descent Solves Multi-Channel Sparse Blind Deconvolution Provably and Efficiently. (arXiv:1911.11167v1 [stat.ML])

Multi-channel sparse blind deconvolution, or convolutional sparse coding, refers to the problem of learning an unknown filter by observing its circulant convolutions with multiple input signals that are sparse. This problem finds numerous applications in signal processing, computer vision, and inverse problems. However, it is challenging to learn the filter efficiently due to the bilinear…

DeepJSCC-f: Deep Joint-Source Channel Coding of Images with Feedback. (arXiv:1911.11174v1 [cs.IT])

We consider wireless transmission of images in the presence of channel output feedback. From a Shannon theoretic perspective feedback does not improve the asymptotic end-to-end performance, and separate source coding followed by capacity achieving channel coding achieves the optimal performance. Although it is well known that separation is not optimal in the practical finite blocklength…

On the covariant representation of integral equations of the electromagnetic field. (arXiv:1911.11138v1 [physics.gen-ph])

Gauss integral theorems for electric and magnetic fields, Faradays law of electromagnetic induction, magnetic field circulation theorem, theorems on the flux and circulation of vector potential, which are valid in curved spacetime, are presented in a covariant form. Covariant formulas for magnetic and electric fluxes, for electromotive force and circulation of the vector potential are…

Strongly correlated Fermions strongly coupled to light. (arXiv:1911.11151v1 [cond-mat.quant-gas])

Strong quantum correlations in matter are responsible for some of the most extraordinary properties of material, from magnetism to high-temperature superconductivity, but their integration in quantum devices requires a strong, coherent coupling with photons, which still represents a formidable technical challenge in solid state systems. In cavity quantum electrodynamics, quantum gases such as Bose-Einstein condensates…

Global hybrid multiconfiguration pair-density functional theory. (arXiv:1911.11162v1 [physics.chem-ph])

A global hybrid extension of variational two-electron reduced-density matrix (v2RDM)-driven multiconfiguration pair-density functional theory (MCPDFT) is developed. Using a linear decomposition of the electron-electron repulsion term, a fraction {\lambda} of the nonlocal exchange interaction, obtained from v2RDM-driven complete active-space self-consistent field (CASSCF) theory, is combined with its local counterpart, obtained from an on-top pair-density functional.…

Multi-scale Molecular Simulations on Respiratory Complex I. (arXiv:1911.11178v1 [physics.bio-ph])

Complex I (NADH:ubiquinone oxidoreductase) is a redox-driven proton pump that powers synthesis of adenosine triphosphate (ATP) and active transport in most organisms. This gigantic enzyme reduces quinone (Q) to quinol (QH2) in its hydrophilic domain, and transduces the released free energy into pumping of protons across its membrane domain, up to ca. 200 {\AA} away…

Automatic Post-Stroke Lesion Segmentation on MR Images using 3D Residual Convolutional Neural Network. (arXiv:1911.11209v1 [eess.IV])

In this paper, we demonstrate the feasibility and performance of deep residual neural networks for volumetric segmentation of irreversibly damaged brain tissue lesions on T1-weighted MRI scans for chronic stroke patients. A total of 239 T1-weighted MRI scans of chronic ischemic stroke patients from a public dataset were retrospectively analyzed by 3D deep convolutional segmentation…

One Man’s Trash is Another Man’s Treasure: Resisting Adversarial Examples by Adversarial Examples. (arXiv:1911.11219v1 [cs.LG])

Modern image classification systems are often built on deep neural networks, which suffer from adversarial examples–images with deliberately crafted, imperceptible noise to mislead the network’s classification. To defend against adversarial examples, a plausible idea is to obfuscate the network’s gradient with respect to the input image. This general idea has inspired a long line of…

Development of On Board Computer for a Nanosatellite. (arXiv:1911.11225v1 [eess.SY])

This paper describes the process of conceptualization, design, and testing of the Onboard Computer (OBC) Software for a 3U nanosatellite. The on-board computer of the satellite is responsible for initiating dataflow between onboard hardware, performing image compression, and run control algorithms like fine pointing, sun pointing, ground pointing for payload operation and idle state detumbling.…