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Journal of Energy and Power Engineering 2014年第12期8卷 2074-2079页

作者： fabio romero Alden Uehara Antunes Fernando Locks Lange Dario Takahata Andre Meffe Carlos Cesar Barioni de Oliveira Hamilton Bueno de Souza Department of Engineering Research and Development Daimon Engineering & Systems Sao Paulo 01310200. Brazil Department of Engineering AES Eletropaulo Distribution Utility. Sao Paulo 06460040 Brazil

This paper aims at analyzing the impact of the neutral conductor absence at specific sections over the performance of the power distribution lines, and proposing alternative solutions to mitigate the problems caused by the neutral conductor theft. Simulations are made by the software lnterplan and show that the absence of neutral conductor at specific sections of power distribution lines may increase the neutral-to-ground voltages, which compromises the system＇s safety. The solution developed keeps the technical performance of the power distribution system at satisfactory levels, regarding the voltage profile, or, at least, close to the level before the neutral conductor＇s theft.

关键词： Power distribution systems conductor theft system safety neutral-to-ground voltages grounding.

Development of a Genetic Algorithm for Evaluating the Performance of Overhead Power Distribution Lines and Proposing Solutions to Improve Distribution Line Safety

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Journal of Energy and Power Engineering 2015年第1期9卷 78-82页

作者： fabio romero Alden U. Antunes Dario Takahata Andre Meffe Carlos C. B. Oliveira Femando L. Lange Hamilton Souza Department of Engineering Research and Development Daimon Engineering & Systems Sao Paulo 01310200 Brazil Department of Engineering AES Eletropaulo Distribution Utility Sao Paulo 06460040 Brazil

This paper aims to present and discuss the use of a power flow methodology based on Gauss elimination method to evaluate the performance of distribution network taking into account the neutral conductor absence at specific sections, and a development of a methodology based on GA （genetic algorithm） capable of evaluating alternative solutions in different bars of the feeder, in order to propose appropriate solutions to improve the distribution network safety. Besides the technical aspects, the proposed GA methodology takes into account the economic feasibility analysis. The results of power flow simulations have shown that the presence of single-phase transformers along with the absence of the neutral conductor at specific sections of the MV （medium voltage） network may increase the Vng （neutral-to-ground voltage） levels of the feeders involved, jeopardizing the system＇s safety. On the other hand, the solutions proposed by the GA methodology may reduce the network Vng levels and improve the safety conditions, providing values close to the ones found before the neutral conductor theft.

关键词： Genetic algorithm power flow distribution line safety power flow simulation

Environmental parameters assessment of a new diffuser for air cooling/heating system:Measurements and numerical validation

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Building Simulation 2022年第6期15卷 1111-1132页

作者： fabio Nardecchia Laura Pompei fabio Bisegna Department of Astronautic Electric and Energy EngineeringSapienza UniversityVia Eudossiana 18RomeItaly

Air distribution of HVAC systems is the most popular type used in the building sector,having a relevant impact on indoor air quality and occupant *** types of research developed optimal solutions for the HVAC system’s design,focusing on specific components of the distribution system,on the airflow and geometry of ducts,on the size of ducts,on the shape and position of air ***,few works in literature proposed a globally experimental and simulation analysis of an air distribution system with a variable mass flaw *** this line,the presented research investigates the potentialities of a new ceiling diffuser,installed in an exhibition *** system provides a variable mass flow rate thanks to its configuration,providing adequate thermal comfort.A warm wall is chosen as the heating *** tests are carried out,six for cooling and two for heating with different volumetric air rates and supply air temperature of the *** combination of two methods,the measurement campaigns and the computational fluid dynamics(CFD)technique represent a suitable approach to examine the thermal indoor *** general,results show a strong capability of this diffuser to provide a uniform temperature and velocity field inside the ***,experimental and numerical data are significantly comparable with an average deviation of 1%for the velocity and lower 1%for the temperature,guaranteeing an optimal distribution of the understudy environmental parameters on the vertical and horizontal planes.

关键词： environmental parameters CFD field measurements INDULINE HVAC systems thermal comfort

Air quality nearby road traffic tunnel portals: BTEX monitoring

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Journal of Environmental Sciences 2007年第5期19卷 578-583页

作者： fabio Murena Chemical Engineering Department University of Naples "Federico Ⅱ"80125 NaplesItaly.

A monitoring campaign of BTEX （benzene, toluene, ethylbenzene, o- m- and p-xylene） was carried out nearby two tunnel portals in the urban area of Naples with the aim to verify air quality in this kind of urban sites. Sampling was carried out using the active adsorption technique. Sampling time was 1 h. Ambient temperature and traffic flow measurements were carried out during each sampling operation. The results indicate that average benzene concentrations at both sites exceed the limit value of 10 μg/Nm^3 established by the European Community （EC）（Dir. 2000/69）. Concentration levels of other BTEX are relatively high as well. A correlation between BTEX concentration and two wheeler vehicle flow was observed.

关键词： air quality monitoring BTEX urban area active adsorption sampling tunnel

Mitochondrial DNA methylation and mitochondria-related epigenetics in neurodegeneration

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Neural Regeneration Research 2024年第2期19卷 405-406页

作者： fabio Coppedè Department of Translational Research and of New Surgical and Medical Technologies Laboratory of Medical GeneticsUniversity of PisaPisaItaly、Interdepartmental Research Center of Biology and Pathology of AgingUniversity of PisaPisaItaly

Mitochondria are cytoplasmic organelles referred to as the powerhouse of the cell because they are primarily involved in oxidative phosphorylation and energy *** are particularly abundant in tissues with high energy demands,including muscle,liver,and brain,and mitochondrial dysfunction,oxidative mitochondrial DNA(mtDNA)damage,and impaired mitochondrial dynamics have often been associated with neurodegeneration.

关键词： impaired neurodegeneration oxidative

A refined Frequency Domain Decomposition tool for structural modal monitoring in earthquake engineering

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Earthquake Engineering and Engineering Vibration 2017年第3期16卷 627-648页

作者： fabio Pioldi Egidio Rizzi Department of Engineering and Applied Sciences (Dalmine) University of Bergamo viale G. Marconi 5 1-24044 Dalmine (BG) Italy

Output-only structural identification is developed by a refined Frequency Domain Decomposition（rFDD） approach, towards assessing current modal properties of heavy-damped buildings（in terms of identification challenge）, under strong ground motions. Structural responses from earthquake excitations are taken as input signals for the identification algorithm. A new dedicated computational procedure, based on coupled Chebyshev Type Ⅱ bandpass filters, is outlined for the effective estimation of natural frequencies, mode shapes and modal damping ratios. The identification technique is also coupled with a Gabor Wavelet Transform, resulting in an effective and self-contained time-frequency analysis framework. Simulated response signals generated by shear-type frames（with variable structural features） are used as a necessary validation condition. In this context use is made of a complete set of seismic records taken from the FEMA P695 database, i.e. all 44 ＂Far-Field＂（22 NS, 22 WE） earthquake signals. The modal estimates are statistically compared to their target values, proving the accuracy of the developed algorithm in providing prompt and accurate estimates of all current strong ground motion modal parameters. At this stage, such analysis tool may be employed for convenient application in the realm of Earthquake Engineering, towards potential Structural Health Monitoring and damage detection purposes.

关键词： Operational Modal Analysis (OMA) modal dynamic identification refined Frequency Domain Decomposition(rFDD) FEMA P695 seismic database earthquake response identification input

Knowledge-Enhanced Conversational Agents

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Journal of Computer Science & Technology 2024年第3期39卷 585-609页

作者： fabio Caffaro Giuseppe Rizzo LINKS Foundation 10138 TurinItaly

Humanity has fantasized about artificial intelligence tools able to discuss with human beings fluently for *** efforts have been proposed ranging from ELIZA to the modern vocal *** the large interest in this research and innovation field,there is a lack of common understanding on the concept of conversational agents and general over expectations that hide the current limitations of existing *** work proposes a literature review on the subject with a focus on the most promising type of conversational agents that are powered on top of knowledge bases and that can offer the ground knowledge to hold conversation autonomously on different *** describe a conceptual architecture to define the knowledge-enhanced conversational agents and investigate different domains of *** conclude this work by listing some promising research pathways for future work.

关键词： conversational agent dialogue system knowledge enhancing artificial agent intelligent conversation

Variable-order fracture mechanics and its application to dynamic fracture

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npj Computational Materials 2021年第1期7卷 248-255页

作者： Sansit Patnaik fabio Semperlotti School of Mechanical Engineering Ray W.Herrick LaboratoriesPurdue UniversityWest LafayetteIN 47907USA

This study presents the formulation,the numerical solution,and the validation of a theoretical framework based on the concept of variable-order mechanics and capable of modeling dynamic fracture in brittle and quasi-brittle *** specifically,the reformulation of the elastodynamic problem via variable and fractional-order operators enables a unique and extremely powerful approach to model nucleation and propagation of cracks in solids under dynamic *** resulting dynamic fracture formulation is fully evolutionary,hence enabling the analysis of complex crack patterns without requiring any a priori assumption on the damage location and the growth path,and without using any algorithm to numerically track the evolving crack *** evolutionary nature of the variable-order formalism also prevents the need for additional partial differential equations to predict the evolution of the damage field,hence suggesting a conspicuous reduction in complexity and computational ***,the variable-order formulation is naturally capable of capturing extremely detailed features characteristic of dynamic crack propagation such as crack surface roughening as well as single and multiple *** accuracy and robustness of the proposed variableorder formulation are validated by comparing the results of direct numerical simulations with experimental data of typical benchmark problems available in the literature.

关键词： formulation dynamic hence

Shoreline evolution and modern beach sand composition along a coastal stretch of the Tyrrhenian Sea, southern Italy

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Journal of Palaeogeography 2021年第2期10卷 222-243页

作者： Consuele Morrone fabio letto Department of Biology Ecology and Earth Sciences(DiBEST)University of study CalabriaVia P.Buccicubo 15B87036 Arcavacata di RendeCosenzaItalia

This contribution focuses on a multidisciplinary research showing the geomorphological evolution and the beach sand composition of the Tyrrhenian shoreline between Capo Suvero promontory and Gizzeria Lido village(Calabria,southern Italy). The aim of the geomorphological analysis was to reconstruct the evolutionary shoreline stages and the present-day sedimentary dynamics along approximately 6 km of coastline. The results show a general trend of beach nourishment during the period 1870–2019. In this period, the maximum shoreline accretion value was estimated equal to + 900 m with an average rate of + 6.5 m/yr. Moreover, although the general evolutionary trend is characterized by a remarkable accretion, the geomorphological analysis highlighted continuous modifications of the beaches including erosion processes. The continuous beach modifications occurred mainly between 1953 and1983 and were caused mainly by human activity in the coastal areas and inside the hydrographic basins. The beach sand composition allowed an assessment of the mainland petrological sedimentary province and its dispersal pattern of the present coastal dynamics. Petrographic analysis of beach sands identified a lithic metamorphi-clastic petrofacies, characterized by abundant fine-grained schists and phyllites sourced from the crystalline terrains of the Coastal Range front and carried by the Savuto River. The sand is also composed of a mineral assemblage comparable to that of the Amato River provenance. In terms of framework detrital constituents of QFL(quartz:feldspars:aphanitic lithic fragments) and of essential extraclasts, such as granitoid:sedimentary:metamorphic phaneritic rock fragments(Rg:Rs:Rm), sand maturity changes moderately from backshore to shoreface, suggesting that transport processes had a little effect on sand maturity. Moreover, the modal composition suggests that the Capo Suvero promontory does not obstruct longshore sand transport from the north. Indeed, sands displaced by cu

关键词： Sandy petrofacies Detrital modes Shoreline evolution Capo Suvero Tyrrhenian coast Southern Italy

When Edge Computing Meets IoT Systems: Analysis of Case Studies

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China Communications 2020年第10期17卷 50-63页

作者： fabio Arena Giovanni Pau Faculty of Engineering and Architecture Kore University of EnnaCittadella UniversitariaEnna 94100Italy

On a macroscopic level,an edge computing architecture looks like a distributed and decentralized IT(Information Technology)*** in detail,it could be defined as a mesh network of micro data centers capable of processing and storing critical data locally,and to transmit all data received and/or processed to a central data center or a cloud storage *** network topology,also taking advantage of the availability on the market of cost-effective small form factor(SFF)electronic components and systems decreasing,brings the essential components of processing,storage,and networking closer to the sources that generate the *** typical use case is that of Internet of Things(IoT)devices and implementations,which often face latency problems,lack of bandwidth,reliability,which cannot be addressed through the conventional cloud *** this context,the edge computing architecture can reduce the size of data to be sent to the cloud,processing critical data,sensitive to latency,at the point of origin,via a smart device,or sending it to an intermediate server,located *** aim of this paper is to report some of the main aspects and significant features of edge computing and analyzing several popular case studies.

关键词： edge computing fog computing cloud computing analysis internet of things