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Machine and deep learning driven models for the design of heat exchangers with micro-finned tubes

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Energy and AI 2024年第2期16卷 417-437页

作者： Emad Efatinasab Nima Irannezhad Mirco Rampazzo andrea Diani Department of Information Engineering University of PadovaVia Gradenigo 6/bPadova35131PDItaly Department of Industrial Engineering University of PadovaVia Venezia 1Padova35131PDItaly

The design of micro-finned tube heat exchangers is a complex task due to intricate geometry, heat transfer goals, material selection, and manufacturing challenges. Nowadays, mathematical models provide valuable insights, aid in optimization, and allow us to explore various design parameters efficiently. However, existing empirical models often fall short in facilitating an optimal design because of their limited accuracy, sensitivity to assumption, and context dependency. In this scenario, the use of Machine and Deep Learning (ML and DL) methods can enhance accuracy, manage nonlinearity, adjust to varying conditions, decrease dependence on assumptions, automatically extract pertinent features, and provide scalability. Indeed, ML and DL techniques can derive valuable insights from datasets, contributing to a comprehensive understanding. By means of multiple ML and DL methods, this paper addresses the challenge of estimating key parameters in micro-finned tube heat exchangers such as the heat transfer coefficient (HTC) and frictional pressure drop (FPD). The methods have been trained and tested using an experimental dataset consisting of over a thousand data points associated with flow condensation, involving various tube geometries. In this context, the Artificial Neural Network (ANN) demonstrates superior performance in accurately estimating parameters with MAEs in the range below 4.5% for both HTC and FPD. Finally, recognizing the importance of comprehending the internal mechanisms of the black-box ANN model, the paper explores its interpretability aspects.

关键词： Condensation Micro-finned tube Artificial neural network Machine learning Deep learning

A novel low-cost visual ear tag based identification system for precision beef cattle livestock farming

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Information Processing in Agriculture 2024年第1期11卷 117-126页

作者： andrea Pretto Gianpaolo Savio Flaviana Gottardo Francesca Uccheddu Gianmaria Concheri Department of Civil Environmental and Architectural EngineeringUniversity of PaduaItaly Department of Animal Medicine Production and HealthUniversity of PadovaItaly Department of Industrial Engineering University of PadovaItaly

The precision livestock farming(PLF)has the objective to maximize each animal's performance while reducing the environmental impact and maintaining the quality and safety of meat *** the PLF techniques,the personalised management of each individual animal based on sensors systems,represents a viable *** is worth noting that the implementation of an effective PLF approach can be still expensive,especially for small and medium-sized farms;for this reason,to guarantee the sustainability of a customized livestock management system and encourage its use,plug and play and cost-effective systems are *** this context,we present a novel low-cost method for identifying beef cattle and recognizing their basic activities by a single surveillance *** leveraging the current state-of-the-art methods for real-time object detection,(i.e.,YOLOv3)cattle's face areas,we propose a novel mechanism able to detect the ear tag as well as the water ingestion state when the cattle is close to the *** cow IDs are read by an Optical Character Recognition(OCR)algorithm for which,an ad hoc error correction algorithm is here presented to avoid numbers misreading and correctly match the IDs to only actually present *** to the detection of the tag position,the OCR algorithm can be applied only to a specific region of interest reducing the computational cost and the time *** times for the areas are outputted as cattle activity recognition *** results demonstrate the effectiveness of our proposed method,showing a mAP@0.50 of 89%.

关键词： Precision livestock farming Deep learning Cattlei dentification Low-cost sensors Computer vision

Extending OpenStack Monasca for Predictive Elasticity Control

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Big Data Mining and Analytics 2024年第2期7卷 315-339页

作者： Giacomo Lanciano Filippo Galli Tommaso Cucinotta Davide Bacciu andrea Passarella Scuola Normale Superiore Pisa 56126Italy the Real-Time Systems Laboratory(RETIS) TelecommunicationsComputer Engineeringand Photonics Institute(TeCIP)Scuola Superiore Sant’AnnaPisa 56127Italy Department of Computer Science University of PisaPisa 56127Italy National Research Council Pisa56127Italy

Traditional auto-scaling approaches are conceived as reactive automations,typically triggered when predefined thresholds are breached by resource consumption *** such rules at scale is cumbersome,especially when resources require non-negligible time to be *** paper introduces an architecture for predictive cloud operations,which enables orchestrators to apply time-series forecasting techniques to estimate the evolution of relevant metrics and take decisions based on the predicted state of the *** this way,they can anticipate load peaks and trigger appropriate scaling actions in advance,such that new resources are available when *** proposed architecture is implemented in OpenStack,extending the monitoring capabilities of Monasca by injecting short-term forecasts of standard *** use our architecture to implement predictive scaling policies leveraging on linear regression,autoregressive integrated moving average,feed-forward,and recurrent neural networks(RNN).Then,we evaluate their performance on a synthetic workload,comparing them to those of a traditional *** assess the ability of the different models to generalize to unseen patterns,we also evaluate them on traces from a real content delivery network(CDN)*** particular,the RNN model exhibites the best overall performance in terms of prediction error,observed client-side response latency,and forecasting *** implementation of our architecture is open-source.

关键词： OpenStack monitoring elasticity control auto-scaling predictive operations Monasca

Biomaterial engineering strategies for modeling the Bruch's membrane in age-related macular degeneration

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Neural Regeneration Research 2024年第12期19卷 2626-2636页

作者： Blanca Molins andrea Rodríguez Víctor Llorenç Alfredo Adán Group of Ocular Inflammation:Clinical and Experimental Studies Institut d’Investigacions Biomèdiques AgustíPi I Sunyer(IDIBAPS)BarcelonaSpain Institut Clínic d’Oftalmologia(ICOF) Hospital Clínic BarcelonaSpain

Age-related macular degeneration,a multifactorial inflammatory degenerative retinal disease,ranks as the leading cause of blindness in the ***,there is a scarcity of curative therapies,especially for the atrophic advanced form of age-related macular degeneration,likely due to the lack of models able to fully recapitulate the native structure of the outer blood retinal barrier,the prime to rget tissue of age-related macular *** in vitro systems rely on 2D monocultures unable to adequately reproduce the structure and function of the outer blood retinal barrier,integrated by the dynamic interaction of the retinal pigment epithelium,the Bruch's membrane,and the underlying *** Bruch's membrane provides structu ral and mechanical support and regulates the molecular trafficking in the outer blood retinal barrier,and therefo re adequate Bruch's membrane-mimics are key for the development of physiologically relevant models of the outer blood retinal barrie *** the last years,advances in the field of biomaterial engineering have provided novel approaches to mimic the Bruch's membrane from a variety of *** review provides a discussion of the integrated properties and function of outer blood retinal barrier components in healt hy and age-related macular degeneration status to understand the requirements to adequately fabricate Bruch's membrane biomimetic ***,we discuss novel materials and techniques to fabricate Bruch's membrane-like scaffolds for age-related macular degeneration in vitro modeling,discussing their advantages and challenges with a special focus on the potential of Bruch's membrane-like mimics based on decellularized tissue.

关键词： age-related macular degeneration Bruch's membrane decellularization retinal pigment epithelium scaffold

Insight into endoplasmic reticulum-mitochondria contacts in human amyotrophic lateral sclerosis

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Neural Regeneration Research 2024年第7期19卷 1407-1408页

作者： Naomi Hartopp andrea Markovinovic Christopher CJ Miller Patricia Gomez-Suaga Sheffield Institute for Translational Neuroscience University of SheffieldSheffieldUK Department of Basic and Clinical Neuroscience Institute of PsychiatryPsychology and NeuroscienceLondonUK Universidad de Extremadura.Departamento de Bioquímica y Biología Molecular y Genética Facultad de Enfermería y Terapia OcupacionalCáceresSpain Centro de Investigación Biomédica en Red en Enfermedades Neurodegenerativas-Instituto de Salud Carlos Ⅲ(CIBER-CIBERNED-ISCⅢ) MadridSpain Instituto Universitario de Investigación Biosanitaria de Extremadura(INUBE) CáceresSpain

Amyotrophic lateral sclerosis(ALS) is a fastprogressing fatal neurodegenerative disease and the most common form of motor neuron *** is currently no cure and approximately 90% of cases are *** shares genetic causes,clinical and neuropathological features with frontotemporal dementia,the second most common form of presenile *** and frontotemporal dementia are therefore considered a disease spectrum(Abramzon et al.,2020).

关键词： senile sclerosis

High risk of thrombosis recurrence in people with idiopathic or only locally caused non-cirrhotic splanchnic vein thrombosis: it is time for guidelines’ revision

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Hepatobiliary Surgery and Nutrition 2024年第4期13卷 699-702页

作者： Massimo Primignani Giulia Tosetti andrea Artoni Fondazione IRCCS Ca’Granda Ospedale Maggiore Policlinico–SC Gastroenterologia ed Epatologia MilanItaly Angelo Bianchi Bonomi Hemophilia and Thrombosis Center Fondazione IRCCS Ca'Granda Ospedale Maggiore PoliclinicoMilanItaly

Portal hypertension caused by non-cirrhotic(and non neoplastic)splanchnic vein thrombosis(NC-SVT)is responsible for 5–10%of portal hypertension cases in the western world(1).Chronic myeloproliferative neoplasms(MPN)or systemic prothrombotic disorders are in cause in about 40%of subjects,while in about 30%a local condition,such as recent abdominal surgery or infection/inflammation triggers the *** local condition,however,can only be the precipitating cause,since a thorough screening allows identifying the co-occurrence of systemic thrombophilia in about 30%of such ***,screening is mandatory even in cases where the cause of NC-SVT seems ***,about 30%of cases of NC-SVT remains unexplained and defined idiopathic(1).

关键词： Non-cirrhotic splanchnic vein thrombosis factor VIII thrombosis recurrence

Impact of surface roughness on the coefficient of friction of polymer-on-polymer contacts for deflection pulley-rope systems in the lift industry

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Friction 2024年第9期12卷 2126-2138页

作者： Ainhoa GUINEA andrea AGINAGALDE Wilson TATO Iñigo LLAVORI Pablo GARCIA Leire ARRAIAGO Alaitz ZABALA Mechanical and Industrial Production Department Mondragon UnibertsitateaMondragon 20500Spain Orona EIC Orona IdeoHernani 20120Spain

The coefficient of friction(CoF)between the deflection pulley and rope in a lift strongly affects the life span of the *** surface roughness is a key factor affecting the metallic pulley–rope CoF,its effect on polymeric pulleys is *** present study analyses the effect of roughness and working conditions on cast polyamide 6(PA6G)deflection pulley–thermoplastic polyurethane(TPU)-coated rope *** statistical analysis revealed that the effect of surface roughness on the CoF for low-load tests was *** present study contributes significantly to parameter selection in deflection pulley machining to minimise friction between the pulley and rope.

关键词： polymer-on-polymer friction roughness dry sliding

The sea bass Dicentrarchus labrax as a marine model species in immunology:Insights from basic and applied research

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Aquaculture and Fisheries 2024年第2期9卷 136-143页

作者： andrea Miccoli Francesco Buonocore Simona Picchietti Giuseppe Scapigliati Department for Innovation in Biological Agro-food and Forest SystemsUniversity of TusciaViterbo01100Italy

This review summarizes the current knowledge on immune defence activities of the European sea bass Dicentrarchus labrax by reporting the consistent amount of work done on this economically-important species.A draft genome sequence is available for this species,together with whole transcriptomes from lymphoid and non-lymphoid *** full-length coding sequences of many immunoregulatory and immune-related genes allow for targeted quantitative PCR analysis,nowadays needed for-omics data verification,ex vivo and in *** first anti-T cells monoclonal antibody teleost-wise was obtained in sea bass,followed by several monoclonal and polyclonal markers of lymphocyte populations,namely T cells(pan-T,CD3ε,TcRγ,CD45),and B cells(IgM,IgT,IgD).The combined use of molecular and biochemical tools enabled investigations on innate and acquired immune responses of sea bass in unstimulated/stimulated fish,along the development and under variable environmental conditions and food *** overview of sea bass viral and bacterial pathogens and available vaccines against these microorganisms is also *** knowledge accumulated in the past 25 years validates the European sea bass as a reference marine model in the field of fish immunology.

关键词： Sea bass Dicentrarchus labrax Fish immunology Acquired immunity Innate immunity Evolutionary immunology

Epidemicity indices and reproduction numbers from infectious disease data in connected human populations

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Infectious Disease Modelling 2024年第3期9卷 875-891页

作者： Cristiano Trevisin Lorenzo Mari Marino Gatto andrea Rinaldo Laboratory of Ecohydrology École Polytechnique Fédérale de LausanneStation 2Lausanne1015Switzerland Dipartimento di Elettronica Informazione e BioingegneriaPolitecnico di MilanoVia Ponzio 34/5Milano20133Italy Dipartimento di Ingegneria Civile Edile e Ambientale(ICEA)Universitàdi PadovaStation 2Padova35131Italy

We focus on distinctive data-driven measures of the fate of ongoing *** relevance of our pursuit is suggested by recent results proving that the short-term temporal evolution of infection spread is described by an epidemicity index related to the maximum instantaneous growth rate of new infections,echoing concepts and tools developed to study the reactivity of *** epidemicity indices can showcase the dynamics of infections,together with commonly employed effective reproduction numbers,especially when the latter assume values less than *** particular,epidemicity evaluates the short-term reactivity to perturbations of a disease-free ***,we show that sufficient epidemicity thresholds to prevent transient epidemic outbreaks in a spatially connected setting can be estimated by generalizing existing analogues derived when spatial effects are *** specifically account for the discrete nature,in both space and time,of surveillance data of the type typically employed to estimate effective reproduction numbers that formed the bulk of the communication of the state of the COVID-19 pandemic and its *** analyzing the effects of spatial heterogeneity on the considered prognostic indicators,we perform a short-and long-term analysis on the COVID-19 pandemic in Italy,showing that endemic conditions were maintained throughout the duration of our simulation despite stringent control *** method provides a portfolio of prognostic indices that are essential to pinpoint the ongoing pandemic in both a qualitative and quantitative manner,as our results *** base our conclusions on extended investigations of the effects of spatial fragmentation of communities of different sizes owing to connectivity by human mobility and contact scenarios,within real geographic contexts and synthetic setups designed to test our framework.

关键词： COVID-19 Ecological reactivity Epidemicity Reproduction numbersLeslie matrix Metapopulation Mobility