248 research outputs found
Counterfeit Detection with Multispectral Imaging
Multispectral imaging is becoming more practical for a variety of applications due to its ability to provide hyper specific information through a non-destructive analysis. Multispectral imaging cameras can detect light reflectance from different spectral bands of visible and nonvisible wavelengths. Based on the different amount of band reflectance, information can be deduced on the subject. Counterfeit detection applications of multispectral imaging will be decomposed and analyzed in this thesis. Relations between light reflectance and objects’ features will be addressed. The process of the analysis will be broken down to show how this information can be used to provide more insight on the object. This technology provides desired and viable information that can greatly improve multiple fields. For this paper, the multispectral imaging research process of element solution concentrations and counterfeit detection applications of multispectral imaging will be discussed. BaySpec’s OCI-M Ultra Compact Multispectral Imager is used for data collection. This camera is capable of capturing light reflectance from wavelengths of 400 – 1000 nm. Further research opportunities of developing self-automated unmanned aerial vehicles for precision agriculture and extending counterfeit detection applications will also be explored
The supercover of an m-flat is a discrete analytical object
International audienc
Numerical elimination and moduli space of vacua
We propose a new computational method to understand the vacuum moduli space of (supersymmetric) field theories. By combining numerical algebraic geometry (NAG) and elimination theory, we develop a powerful, efficient, and parallelizable algorithm toextract important information such as the dimension, branch structure, Hilbert series and subsequent operator counting, as well as variation according to coupling constants and mass parameters. We illustrate this method on a host of examples from gauge theory, string theory, and algebraic geometry
Unstable blowups
Let (X,L) be a polarised manifold. We show that K-stability and as- ymptotic Chow stability of the blowup of X along a 0-dimensional cycle are closely related to Chow stability of the cycle itself, for polarisations making the exceptional divisors small. This can be used to give (almost) a converse to the results of Arezzo and Pacard (2004 and 2007) and to give new examples of K \u308ahler classes with no constant scalar curvature representatives
Nonlocal minimal surfaces: Interior regularity, quantitative estimates and boundary stickiness
We consider surfaces which minimize a nonlocal perimeter functional and we discuss their interior regularity and rigidity properties, in a quantitative and qualitative way, and their (perhaps rather surprising) boundary behavior. We present at least a sketch of the proofs of these results, in a way that aims to be as elementary and self contained as possible, referring to the papers [CRS10, SV13, CV13, BFV14, FV, DSV15, CSV16] for full details
Emotional Expression Detection in Spoken Language Employing Machine Learning Algorithms
There are a variety of features of the human voice that can be classified as
pitch, timbre, loudness, and vocal tone. It is observed in numerous incidents
that human expresses their feelings using different vocal qualities when they
are speaking. The primary objective of this research is to recognize different
emotions of human beings such as anger, sadness, fear, neutrality, disgust,
pleasant surprise, and happiness by using several MATLAB functions namely,
spectral descriptors, periodicity, and harmonicity. To accomplish the work, we
analyze the CREMA-D (Crowd-sourced Emotional Multimodal Actors Data) & TESS
(Toronto Emotional Speech Set) datasets of human speech. The audio file
contains data that have various characteristics (e.g., noisy, speedy, slow)
thereby the efficiency of the ML (Machine Learning) models increases
significantly. The EMD (Empirical Mode Decomposition) is utilized for the
process of signal decomposition. Then, the features are extracted through the
use of several techniques such as the MFCC, GTCC, spectral centroid, roll-off
point, entropy, spread, flux, harmonic ratio, energy, skewness, flatness, and
audio delta. The data is trained using some renowned ML models namely, Support
Vector Machine, Neural Network, Ensemble, and KNN. The algorithms show an
accuracy of 67.7%, 63.3%, 61.6%, and 59.0% respectively for the test data and
77.7%, 76.1%, 99.1%, and 61.2% for the training data. We have conducted
experiments using Matlab and the result shows that our model is very prominent
and flexible than existing similar works.Comment: Journal Pre-print (15 Pages, 9 Figures, 3 Tables
Automatic Environmental Sound Recognition: Performance versus Computational Cost
In the context of the Internet of Things (IoT), sound sensing applications
are required to run on embedded platforms where notions of product pricing and
form factor impose hard constraints on the available computing power. Whereas
Automatic Environmental Sound Recognition (AESR) algorithms are most often
developed with limited consideration for computational cost, this article seeks
which AESR algorithm can make the most of a limited amount of computing power
by comparing the sound classification performance em as a function of its
computational cost. Results suggest that Deep Neural Networks yield the best
ratio of sound classification accuracy across a range of computational costs,
while Gaussian Mixture Models offer a reasonable accuracy at a consistently
small cost, and Support Vector Machines stand between both in terms of
compromise between accuracy and computational cost
Cardiac magnetic resonance radiomics: basic principles and clinical perspectives
Radiomics is a novel image analysis technique, whereby voxel-level information is extracted from digital images and used to derive multiple numerical quantifiers of shape and tissue character. Cardiac magnetic resonance (CMR) is the reference imaging modality for assessment of cardiac structure and function. Conventional analysis of CMR scans is mostly reliant on qualitative image analysis and basic geometric quantifiers. Small proof-of-concept studies have demonstrated the feasibility and superior diagnostic accuracy of CMR radiomics analysis over conventional reporting. CMR radiomics has the potential to transform our approach to defining image phenotypes and, through this, improve diagnostic accuracy, treatment selection, and prognostication. The purpose of this article is to provide an overview of radiomics concepts for clinicians, with particular consideration of application to CMR. We will also review existing literature on CMR radiomics, discuss challenges, and consider directions for future work
Nonlocal minimal surfaces: Interior regularity, quantitative estimates and boundary stickiness
We consider surfaces which minimize a nonlocal perimeter functional and
we discuss their interior regularity and rigidity properties, in a
quantitative and qualitative way, and their (perhaps rather surprising)
boundary behavior. We present at least a sketch of the proofs of these
results, in a way that aims to be as elementary and self contained as
possible, referring to the papers [CRS10, SV13, CV13, BFV14,FV,DSV15,CSV16]
for full details
- …