Fabrication of zinc oxide/graphene-carbon nanotubes nanocomposite with
enhanced dye degradation ability
November 21, 2020
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Physics
Mesoscale and Nanoscale Physics
Mesoscale and Nanoscale Physics
A comparative study between zinc oxide graphene-carbon nanotubes
nanocomposite and ZnO nanoparticles was carried out to investigate their
abilities in the degradation of Rhodamine B dye. We utilized the Modified
Hummer method to prepare the...
Controlled KK-theory, and a Milnor exact sequence
November 21, 2020
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Mathematics
Operator Algebras
K-Theory and Homology
We introduce controlled KK-theory groups associated to a pair (A,B) of
separable C∗-algebras. Roughly, these consist of elements of the usual
K-theory group K0(B) that approximately commute with elements of A. Our
main results...
Minimax Adaptive Control for a Finite Set of Linear Systems
November 21, 2020
Mathematics
Optimization and Control
An adaptive controller with bounded l2-gain from disturbances to errors is
derived for linear time-invariant systems with uncertain parameters restricted
to a finite set. The gain bound refers to the closed loop system, including the
non-li...
Discovery of stable surfaces with extreme work functions by
high-throughput density functional theory and machine learning
November 21, 2020
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Physics
Materials Science
Computational Physics
Data Analysis, Statistics and Probability
The work function is the key surface property that determines how much energy
is required for an electron to escape the surface of a material. This property
is crucial for thermionic energy conversion, band alignment in
heterostructures, an...
Improved quantum data analysis
November 21, 2020
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Physics
Computer Science
Quantum Physics
Computational Complexity
We provide more sample-efficient versions of some basic routines in quantum
data analysis, along with simpler proofs. Particularly, we give a quantum
"Threshold Search" algorithm that requires only O((log2m)/ϵ2)
samples of a $d...
Some Open Problems Regarding the Number of Lines and Slopes in
Arrangements that Determine Shapes
November 20, 2020
Mathematics
General Mathematics
A set L of straight lines and a set P of points in the Euclidean plane
define an arrangement A = (L, P) of construction lines and
registration marks, if and only if: (1) any point in P is a point of
intersection of at ...
Parity of an odd dominating set
November 20, 2020
Mathematics
Combinatorics
For a simple graph G with vertex set V(G)={v1,...,vn}, we define the
closed neighborhood set of a vertex u as N[u]={v∈V(G)∣vis adjacent touorv=u} and the closed neighborhood
matrix $N...
A Function Based on Chebyshev Polynomials as an Alternative to the Sinc
Function in FIR Filter Design
November 20, 2020
Electrical Engineering and Systems Science
Signal Processing
The sinc function is often used as the basis for the design of discrete
linear-phase FIR filters. However the Fourier transform of the truncated sinc
function exhibits ripple in the pass band due to the Gibbs phenomenon. This
paper introduc...
Data-Informed Global Sparseness in Attention Mechanisms for Deep Neural
Networks
November 20, 2020
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Computer Science
Computation and Language
Attention mechanisms play a crucial role in the neural revolution of Natural
Language Processing (NLP). With the growth of attention-based models, several
pruning techniques have been developed to identify and exploit sparseness,
making the...
Spectra of Complex Unit Hypergraphs
November 20, 2020
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Mathematics
Combinatorics
Spectral Theory
A complex unit hypergraph is a hypergraph where each vertex-edge incidence is
given a complex unit label. We define the adjacency, incidence, Kirchoff
Laplacian and normalized Laplacian of a complex unit hypergraph and study each
of them. E...