Francesco Piazza

ORCID: 0000-0003-0205-3790
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About
Contact & Profiles
Research Areas
  • Speech and Audio Processing
  • Advanced Adaptive Filtering Techniques
  • Neural Networks and Applications
  • Blind Source Separation Techniques
  • Music and Audio Processing
  • Image and Signal Denoising Methods
  • Protein Structure and Dynamics
  • Control Systems and Identification
  • Acoustic Wave Phenomena Research
  • Smart Grid Energy Management
  • Hearing Loss and Rehabilitation
  • Spectroscopy and Quantum Chemical Studies
  • Radio Frequency Integrated Circuit Design
  • Music Technology and Sound Studies
  • Speech Recognition and Synthesis
  • Nonlinear Dynamics and Pattern Formation
  • Spectroscopy and Chemometric Analyses
  • Machine Learning and ELM
  • Cold Atom Physics and Bose-Einstein Condensates
  • Analog and Mixed-Signal Circuit Design
  • Physics of Superconductivity and Magnetism
  • Digital Filter Design and Implementation
  • Semantic Web and Ontologies
  • Vehicle Noise and Vibration Control
  • Nonlinear Photonic Systems

Université d'Orléans
2015-2025

Centre National de la Recherche Scientifique
2014-2025

Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
2001-2025

University of Augsburg
2023-2024

Max Planck Institute for the Physics of Complex Systems
2018-2024

Centre de Biophysique Moléculaire
2014-2024

University of Florence
1998-2023

STMicroelectronics (France)
2021

Universidade Federal de Pelotas
2020

Marche Polytechnic University
2010-2019

The optimization of energy consumption, with consequent costs reduction, is one the main challenges in present and future smart grids. Of course, this has to occur keeping living comfort for end-user unchanged. In work, an approach based on mixed-integer linear programming paradigm, which able provide optimal solution terms tasks power consumption management renewable resources, developed. proposed algorithm yields task scheduling under dynamic electrical constraints, while simultaneously...

10.1109/tii.2012.2230637 article EN IEEE Transactions on Industrial Informatics 2012-11-30

Fault diagnosis of electric motors is a fundamental task for production line testing, and it usually performed by experienced human operators. In the recent years, several methods have been proposed in literature detecting faults automatically. Deep neural networks successfully employed this task, but, up to authors' knowledge, they never used an unsupervised scenario. This paper proposes method diagnosing using novelty detection approach based on deep autoencoders. method, vibration signals...

10.1109/jas.2019.1911393 article EN IEEE/CAA Journal of Automatica Sinica 2019-02-25

A recursive algorithm for updating the coefficients of a neural network structure complex signals is presented. Various activation functions are considered and practical definition proposed. The method, associated to mean-square-error criterion, yields form conventional backpropagation algorithm.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

10.1109/78.127967 article EN IEEE Transactions on Signal Processing 1992-04-01

Recent papers reporting CMOS RF building blocks have aroused great expectations for receivers using deep-submicron technologies. This paper examines the trend in scaling, order to establish required current levels and achievable performance different feature sizes, if robust, easily manufacturable designs are be implemented cellular applications. The boundary conditions (system-level constraints) such designs, terms of number trimmed untrimmed external components roles they play relaxing...

10.1109/4.701249 article EN IEEE Journal of Solid-State Circuits 1998-07-01

Research on Smart Grids has recently focused the energy monitoring issue, with objective to maximize user consumption awareness in building contexts one hand, and provide a detailed description of customer habits utilities other. One hottest topic this field is represented by Non-Intrusive Load Monitoring (NILM): it refers those techniques aimed at decomposing aggregated data acquired single point measurement into diverse profiles appliances operating electrical system under study. The focus...

10.1109/eeeic.2015.7165334 article EN 2015-06-01

This paper focuses on online learning procedures for locally recurrent neural nets with emphasis multilayer perceptron (MLP) infinite impulse response (IIR) synapses and its variations which include generalized output activation feedback networks (MLN). We propose a new gradient-based procedure called recursive backpropagation (RBP) whose version, causal (CRBP), has some advantages over other methods. CRBP includes as particular cases (BP), temporal BP, Back-Tsoi algorithm (1991) among...

10.1109/72.750549 article EN IEEE Transactions on Neural Networks 1999-03-01

Multilayer perceptrons (MLPs) with weight values restricted to powers of two or sums are introduced. In a digital implementation, these neural networks do not need multipliers but only shift registers when computing in forward mode, thus saving chip area and computation time. A learning procedure, based on backpropagation, is presented for such networks. This procedure requires full real arithmetic therefore must be performed offline. Some test cases presented, concerning MLPs hidden layers...

10.1109/72.182695 article EN IEEE Transactions on Neural Networks 1993-01-01

More than 60 years of biochemical and biophysical studies have accustomed us to think proteins as highly purified entities that act in isolation, more or less freely diffusing until they find their cognate partner bind to. While vitro experiments reproduce these conditions largely remain the only way investigate intrinsic properties molecules, this approach ignores an important factor: natural milieu , are surrounded by several other molecules different chemical nature, crowded environment...

10.1088/1478-3975/10/4/040301 article EN Physical Biology 2013-08-02

A Speaker Localization algorithm based on Neural Networks for multi-room domestic scenarios is proposed in this paper. The approach fully data-driven and employs a Network fed by GCC-PHAT (Generalized Cross Correlation Phase Transform) Patterns, calculated means of the microphone signals, to determine speaker position room under analysis. In particular, we deal with case study, which acoustic scene each influenced sounds emitted other rooms. tested against home recorded DIRHA dataset,...

10.1109/mlsp.2016.7738817 article EN 2016-09-01

When the novel coronavirus disease SARS-CoV2 (COVID-19) was officially declared a pandemic by WHO in March 2020, scientific community had already braced up effort of making sense fast-growing wealth data gathered national authorities all over world. However, despite diversity theoretical approaches and comprehensiveness many widely established models, official figures that recount course outbreak still sketch largely elusive intimidating picture. Here we show unambiguously dynamics COVID-19...

10.1016/j.csfx.2020.100034 article EN cc-by-nc-nd Chaos Solitons & Fractals X 2020-03-01

In this paper, a new adaptive spline activation function neural network (ASNN) is presented. Due to the ASNN's high representation capabilities, networks with small number of interconnections can be trained solve both pattern recognition and data processing real-time problems. The main idea use Catmull-Rom cubic as neuron's function, which ensures simple structure suitable for software hardware implementation. Experimental results demonstrate improvements in terms generalization capability...

10.1109/72.761726 article EN IEEE Transactions on Neural Networks 1999-05-01

We introduce a topology-based nonlinear network model of protein dynamics with the aim investigating interplay spatial disorder and nonlinearity. show that spontaneous localization energy occurs generically is site-dependent process. Localized modes origin form spontaneously in stiffest parts structure display activation energies. Our results provide straightforward way for understanding recently discovered link between local stiffness enzymatic activity. They strongly suggest phenomena may...

10.1103/physrevlett.99.238104 article EN Physical Review Letters 2007-12-07

Diffusion-limited reactions are usually described within the Smoluchowski theory, which neglects interparticle interactions. We propose a simple way to incorporate excluded-volume effects building on simulations of hard sphere in presence sink. For large values sink-to-particle size ratio ${R}_{s}$, measured encounter rate is good agreement with generalization equation at high densities. Reducing substantially depressed and becomes even nonmonotonic for ${R}_{s}\ensuremath{\ll}1$....

10.1103/physrevlett.105.120601 article EN Physical Review Letters 2010-09-13

In this paper we introduce a fully flexible coarse-grained model of immunoglobulin G (IgG) antibodies parametrized directly on cryo-EM data and simulate the binding dynamics many IgGs to antigens adsorbed surface at increasing densities. Moreover, work out theoretical that allows explain all features observed in simulations. Our combined computational framework is excellent agreement with surface-plasmon resonance us establish number important results. (i) Internal flexibility key maximize...

10.1371/journal.pcbi.1004752 article EN cc-by PLoS Computational Biology 2016-03-11

Novelty detection is the task of recognising events differ from a model normality. This paper proposes an acoustic novelty detector based on neural networks trained with adversarial training strategy. The proposed approach composed feature extraction stage that calculates Log-Mel spectral features input signal. Then, autoencoder network, corpus "normal" signals, employed to detect whether segment contains abnormal event or not. A detected if Euclidean distance between and output exceeds...

10.1109/ijcnn.2017.7966273 article EN 2022 International Joint Conference on Neural Networks (IJCNN) 2017-05-01

Metallic nanoparticles have been used as catalysts for various reactions, and the huge literature on subject is hard to overlook. In many applications, must be affixed a colloidal carrier easy handling during catalysis. These "passive carriers" (e.g., dendrimers) serve controlled synthesis of prevent coagulation Recently, hybrids from polymers developed that allow us change catalytic activity by external triggers. particular, single embedded in thermosensitive network made...

10.1515/zpch-2017-1078 article EN Zeitschrift für Physikalische Chemie 2018-03-13

It is well known that the behaviour of a neural network built with classical summing neurons, as in multilayer perceptron, widely depends on activation functions involved neurons. Many authors have proposed use some free parameters which should allow one to reduce size network, trading connection complexity function complexity. Since many implementations are based digital hardware, performing selected through lookup-table (LUT), it could be interesting study networks whose neurons adaptable...

10.1109/ijcnn.1993.716806 article EN 2005-08-24

It is known that RNS VLSI processors can parallelize fixed-point addition and multiplication operations by the use of Chinese remainder theorem (CRT). The required modular operations, however, must specialized hardware whose design implementation create several problems. In this paper a modified residue arithmetic, called pseudo-RNS introduced in order to alleviate some problems when digital signal processing (DSP) structures are implemented. Pseudo-RNS requires only binary exhibits speed...

10.1109/12.381948 article EN IEEE Transactions on Computers 1995-05-01
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