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501 papers · 1 filter
Representations of finite number of quadratic forms with same rank
Daejun Kim, Byeong-Kweon Oh
Let be positive integers with . Let be the largest integer such that for any (positive definite and integral) quadratic forms of rank $…
Supra-Binary Ferroelectricity in a Nanowire
Wentao Xu, Lihua Wang, Yeongjun Lee +5
We report the prediction and observation of supra-binary ferroelectricity in a ferroelectric nanowire (FNW) covered with a semi-cylindrical gate that provides an anisotropic electr…
Emergence of stochastic flocking for the discrete Cucker-Smale model with randomly switching topologies
Jiu-Gang Dong, Seung-Yeal Ha, Jinwook Jung +1
We study emergent dynamics of the discrete Cucker-Smale (in short, DCS) model with randomly switching network topologies. For this, we provide a sufficient framework leading to the…
Deep Neural Network Based Active User Detection for Grant-free NOMA Systems
Wonjun Kim, Youngjun Ahn, Byonghyo Shim
As a means to support the access of massive machine-type communication devices, grant-free access and non-orthogonal multiple access (NOMA) have received great deal of attention in…
Compressive Sensing Based Channel Estimation for Millimeter-Wave Full-Dimensional MIMO with Lens-Array
Ziwei Wan, Zhen Gao, Byonghyo Shim +3
Channel estimation (CE) for millimeter-wave (mmWave) lens-array suffers from prohibitive training overhead, whereas the state-of-the-art solutions require an extra complicated radi…
On the topology of real Lagrangians in toric symplectic manifolds
Joé Brendel, Joontae Kim, Jiyeon Moon
We explore the topology of real Lagrangian submanifolds in a toric symplectic manifold which come from involutive symmetries on its moment polytope. We establish a real analog of t…