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Reconstructing hourly residential electrical load profiles for Renewable Energy Communities using non-intrusive machine learning techniques

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Energy and AI 2024年第1期15卷 217-235页

作者： Lorenzo Giannuzzo Francesco Demetrio Minuto Daniele Salvatore Schiera andrea Lanzini Energy Center Lab Polytechnic of Turinvia Paolo Borsellino 38/1610152TurinItaly Department of Energy(DENERG) Polytechnic of TurinCorso Duca degli Abruzzi 2410129TurinItaly

The successful implementation of Renewable Energy Communities(RECs)involves maximizing the self-consumption within a community,particularly in regulatory contexts in which shared energy is *** many countries,the absence of a metering infrastructure that provides data at an hourly or sub-hourly resolution level for low-voltage users(e.g.,residential and commercial users)makes the design of a new energy community a challenging *** study proposes a non-intrusive machine learning methodology that can be used to generate residential electrical consumption profiles at an hourly resolution level using only monthly consumption data(i.e.,billed energy),with the aim of estimating the energy shared by *** proposed methodology involves three phases:first,identifying the typical load patterns of residential users through k-Means clustering,then implementing a Random Forest algorithm,based on monthly energy bills,to identify typical load patterns and,finally,reconstructing the hourly electrical load profile through a data-driven rescaling *** effectiveness of the proposed methodology has been evaluated through an REC case study composed by 37 residential users powered by a 70 kWp photovoltaic *** Normalized Mean Absolute Error(NMAE)and the Normalized Root Mean Squared Error(NRMSE)were evaluated over an entire year and whenever the energy was shared within the *** Relative Absolute Error was also measured when estimating the shared energy at both a monthly(MRAE)and at an annual basis.(RAE).A comparison between the REC load profile reconstructed using the proposed methodology and the real load profile yielded an overall NMAE of 20.04%,an NRMSE of 26.17%,and errors of 18.34%and 23.87%during shared energy timeframes,***,our model delivered relative absolute errors for the estimation of the shared energy at a monthly and annual scale of 8.31%and 0.12%,respectively.

关键词： Renewable Energy Community Load profiling Non-intrusive machine learning Data-driven models Data analytics Shared energy estimation

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Numerical modeling techniques for noise emission of free railway wheels

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Railway Engineering Science 2024年第2期32卷 144-161页

作者： Linus Taenzer Urs Pachale Bart Van Damme andrea Bergamini Domenico Tallarico Laboratory of Acoustics/Noise Control EmpaÜberlandstrasse 129DübendorfSwitzerland

In this article,we consider the numerical prediction of the noise emission from a wheelset in laboratory *** focus on the fluid-structure interaction leading to sound emission in the fluid domain by analyzing three different methods to account for acoustic *** are a discretized baffled piston using the discrete calculation method(DCM),a closed cylindrical volume using the boundary element method(BEM)and radiating elastic disks in a cubic enclosure solved with the finite element method(FEM).We provide the validation of the baffled piston and the BEM using measurements of the noise emission of a railway wheel by considering ground reflections in the numerical *** space-resolved waveforms are compared with experimental results as well as with a fluid-structure interaction finite element *** computational advantage of a discretized disk mounted on a baffle and BEM compared to FEM is highlighted,and the baffled pistons limitations caused by a lack of edge radiation effects are investigated.

关键词： Discretized baffled piston Finite element Boundary element Railway noise Acoustic emission Vibrations

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Routine utilization of machine perfusion in liver transplantation:Ready for prime time?

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World Journal of Gastroenterology 2024年第11期30卷 1488-1493页

作者： Alessandro Parente Keyue Sun Philipp Dutkowski AM James Shapiro andrea Schlegel Department of Surgery Division of TransplantationUniversity of Alberta HospitalEdmonton T6G 2B7Canada Immunity and Inflammation Lerner Research InstituteClevelandOH 44195United States Swiss Hepato-Pancreato-Biliary Center Department of Visceral and Transplantation SurgeryUniversity Hospital ZurichZurich 8091Switzerland Immunity and Inflammation Digestive Disease and Surgery InstituteClevelandOH 44195United States

The last decade has been notable for increasing high-quality research and dramatic improvement in outcomes with dynamic liver *** evidence from numerous randomized controlled trials has been pooled by meta-analyses,providing the highest available evidence on the protective effect of machine perfusion(MP)over static cold storage in liver transplantation(LT).Based on a protective effect with less complications and improved graft survival,the field has seen a paradigm shift in organ *** editorial focuses on the role of MP in LT and how it could become the new“gold standard”.Strong collaborative efforts are needed to explore its effects on long-term outcomes.

关键词： Liver transplantation Machine perfusion Viability assessment Hypothermic oxygenated perfusion Normothermic machine perfusion

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Structural Health Monitoring by Accelerometric Data of a Continuously Monitored Structure with Induced Damages

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Structural Durability & Health Monitoring 2024年第6期18卷 739-762页

作者： Giada Faraco andrea Vincenzo De Nunzio Nicola Ivan Giannoccaro Arcangelo Messina Department of Innovation Engineering University of SalentoLecce73100Italy

The possibility of determining the integrity of a real structure subjected to non-invasive and non-destructive monitoring,such as that carried out by a series of accelerometers placed on the structure,is certainly a goal of extreme and current *** the present work,the results obtained from the processing of experimental data of a real structure are *** analyzed structure is a lattice structure approximately 9 m high,monitored with 18 uniaxial accelerometers positioned in pairs on 9 different *** data used refer to continuous monitoring that lasted for a total of 1 year,during which minor damage was caused to the structure by alternatively removing some bracings and repositioning them in the *** methodologies detecting damage based on decomposition techniques of the acquired data were used and tested,as well as a methodology combining the two *** results obtained are extremely interesting,as all the minor damage caused to the structure was identified by the processing methods used,based solely on the monitored data and without any knowledge of the real structure being *** results use 15 acquisitions in environmental conditions lasting 10 min each,a reasonable amount of time to get immediate feedback on possible damage to the structure.

关键词： Structural health monitoring damage detection vibration measurements stochastic subspace identification

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Aqueous electrochemical delithiation of cathode materials as a strategy to selectively recover lithium from waste lithium-ion batteries

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Journal of Energy Chemistry 2024年第1期88卷 144-153,I0004页

作者： Pier Giorgio Schiavi andrea Giacomo Marrani Olga Russina Ludovica D’Annibale Francesco Amato Francesca Pagnanelli Pietro Altimari Department of Chemistry Sapienza University of RomePiazzale Aldo Moro n.500185 RomeItaly

Lithium recovery from end-of-life Li-ion batteries(LIBs)through pyro-and hydrometallurgical recycling processes involves several refining stages,with high consumption of reagents and energy.A competitive technological alternative is the electrochemical oxidation of the cathode materials,whereby lithium can be deintercalated and transferred to an electrolyte solution without the aid of chemical extracting *** article investigates the potential to selectively recover Li from LIB cathode materials by direct electrochemical extraction in aqueous *** process allowed to recovering up to 98%of Li from high-purity commercial cathode materials(LiMn_(2)O_(4),LiCoO_(2),and Li Ni_(1/3)Mn_(1/3)Co_(1/3)O_(2))with a faradaic efficiency of 98%and negligible co-extraction of Co,Ni,and *** process was then applied to recover Li from the real waste LIBs black mass obtained by the physical treatment of electric vehicle battery *** black mass contained graphite,conductive carbon,and metal impurities from current collectors and steel cases,which significantly influenced the evolution and performances of Li electrochemical ***,due to concomitant oxidation of impurities,lithium extraction yields and faradaic efficiencies were lower than those obtained with high-purity cathode *** oxidation was found to occur within the voltage range investigated,but it could not quantitatively explain the reduced Li extraction *** fact,a detailed investigation revealed that above 1.3 V ***/Ag Cl,conductive carbon can be oxidized,contributing to the decreased Li *** on the reported experimental results,guidelines were provided that quantitatively enable the extraction of Li from the black mass,while preventing the simultaneous oxidation of impurities and,consequently,reducing the energy consumption of the proposed Li recovery method.

关键词： Lithium recovery Lithium-ion batteries recycling Electrochemical lithium extraction Lithium selective Extraction

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Standardization is needed in reporting risk and outcomes of machine perfusion in liver transplantation

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Hepatobiliary Surgery and Nutrition 2024年第4期13卷 709-714页

作者： Chase J.Wehrle Charles Miller Koji Hashimoto andrea Schlegel Transplantation Center Department of SurgeryDigestive Disease InstituteCleveland ClinicClevelandOHUSA Department of Immunology Lerner Research InstituteCleveland ClinicClevelandOHUSA

We congratulate Yamamoto et *** their study“Impact of Portable Normothermic Machine Perfusion for Liver Transplantation from Adult Deceased Donors”(1).The surge of interest in normothermic machine perfusion(NMP)in the United States(US)has generated considerable *** authors present generally exciting results from their single-center analysis of 541 liver *** these,469 were from donors after brain dead(DBD);58(12.4%)received NMP and 411 static cold storage(SCS,87.6%).Seventy-two transplants were from donors after circulatory death(DCD);52(72.2%)received NMP(device-to-donor)vs.20 SCS(27.8%).

关键词： Liver transplantation machine perfusion normothermic machine perfusion(NMP) transplantation viability assessment

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Targeted NGS analysis reveals a complex genetic background of idiopathic erythrocytosis in a large Venetian family

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Genes & Diseases 2024年第2期11卷 561-563页

作者： Bertozzi Irene Benetti andrea Regazzo Daniela Polese Francesca Biagetti Giacomo Ceolotto Giulio Randi Maria Luigia First Medical Clinic University of Padua Department of Medicine – DIMEDVia Giustiniani 2Padova 35123Italy Transfusion Medicine Department Ospedale dell'Angelo - Venezia MestreVia Paccagnella 1Venice 30174Italy Emergency Medicine University of Padua Department of Medicine – DIMEDVia Giustiniani 2Padova 35123Italy

Absolute erythrocytosis,due to an increased production of red blood cells,becomes manifest with hemoglobin(Hb)levels above 165 or 160 g/L or with a hematocrit(HCT)above 51%and 48%in males and females,respectively.1 A minority of patients have polycythemia vera(PV);acquired secondary erythrocytosis frequently occurs due to appropriate or inappropriate erythropoietin(EPO)excess,while congenital secondary erythrocytosis may derive from genetic defects causing tissue *** erythrocytosis occurs in patients with genetic mutations of the oxygen-sensing pathway(VHL,PHD2,_HIF-1-alpha)or the erythropoietin receptor(EPOR)genes.2 Recently,HFE gene variants have been described in sporadic erythrocytoses.3 In a high proportion(about 70%)of patients with erythrocytosis,a specific etiology remains elusive despite extensive testing,and the diagnosis of idiopathic erythrocytosis(IE)is ruled out.

关键词： diagnosis patients congenital

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Impact of ozonation on disinfection byproducts formation from phenylalanine during chlorination

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Journal of Environmental Sciences 2024年第10期144卷 199-211页

作者： Sinong Huang Hongwei Liu Kunming Wei Liang Zhang Xiaoyan Ma Qingsong Li Xueyan Li andrea M.Dietrich College of Civil Engineering Zhejiang Key Laboratory of Civil Engineering Structures&Disaster Prevention and Mitigation TechnologyZhejiang University of TechnologyHangzhou 310023China Water Resources and Environmental Institute Xiamen University of TechnologyXiamen 361005China School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China Civil and Environmental Engineering Virginia Polytechnic Institute and State UniversityBlackburgVA 24061USA

As a strong oxidizing agent,ozone is used in some water treatment facilities for disinfection,taste and odor control,and removal of organic ***(Phe)was used as the target amino acid to comprehensively investigate variability of disinfection byproducts(DBPs)formation during chlorine disinfection and residual chlorine conditions subsequent to *** results showed that subsequent to ozonation,the typical regulated and unregulated DBPs formation potential(DBPsFP),including trichloromethane(TCM),dichloroacetonitrile(DCAN),chloral hydrate(CH),dichloroacetic acid(DCAA),trichloroacetic acid(TCAA),and trichloroacetamide(TCAcAm)increased substantially,by 2.4,3.3,5.6,1.2,2.5,and 6.0 times,respectively,compared with only *** also significantly increased the DBPs yield under a 2 day simulated residual chlorine condition that mimicked the water distribution *** formations followed pseudo first order *** formation rates of DBPs in the first 6 hr were higher for TCM(0.214 hr^(−1)),DCAN(0.244 hr^(−1)),CH(0.105 hr^(−1)),TCAcAm(0.234 hr^(−1)),DCAA(0.375 hr^(−1))and TCAA(0.190 hr^(−1))than *** peak DBPsFP of TCM,DCAN,CH,TCAcAm,DCAA,and TCAA were obtained when that ozonation time was set at 5–15 *** times>30 min increased the mineralization of Phe and decreased the formation of DBPs upon *** bromine ion(Br^(−1))concentration increased production of bromine-DBPs and decreased chlorine-DBPs formation by 59.3%–92.2%.Higher ozone dosages and slight alkaline favored to reduce DBP formation and *** ozonation conditions should be optimized for all application purposes including DBPs reduction.

关键词： Ozone Amino acids Chlorination Disinfection by-products

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Insights into the kinetics–morphology relationship of 1-, 2-, and 3D TiNb_(2)O_(7) anodes for Li-ion storage

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Nano Research 2024年第4期17卷 2770-2780页

作者： Wenlei Xu Yaolin Xu Veronika Grzimek andrea Martin Thorsten Schultz Patrícia ARusso Yan Lu Norbert Koch Nicola Pinna Department of Chemistry IRIS Adlershof and the Center for the Science of Materials BerlinHumboldt-Universität zu BerlinBrook-Taylor-Str.212489 BerlinGermany Department of Electrochemical Energy Storage Helmholtz-Zentrum Berlin für Materialien und EnergieHahn-Meitner-Platz 114109 BerlinGermany Institut für Physik and IRIS Adlershof Humboldt-Universität zu BerlinBrook-Taylor-Str.212489 BerlinGermany Joint Research Group of Molecular Systems Helmholtz-Zentrum Berlin für Materialien und Energie12489 BerlinGermany

Understanding the influence of electrode material’s morphology on electrochemical behavior is of great significance for the development of rechargeable batteries,however,such studies are often limited by the inability to precisely control the morphology of electrode ***,nanostructured titanium niobium oxides(TiNb_(2)O_(7))with three different morphologies(one-dimensional(1D),two-dimensional(2D),and three-dimensional(3D))were synthesized via a facile microwave-assisted solvothermal *** influence of the morphological dimension of TiNb_(2)O_(7) as electrode material on the electrochemical performance in Li-ion batteries(LIBs)and the underlying correlation with the electrochemical kinetics were studied in detail.2D TiNb_(2)O_(7)(TNO-2D)shows a superior rate capability and cycling stability,associated with improved kinetics for charge transfer and Li-ion diffusion,compared to the 1D and 3D *** X-ray diffraction measurements reveal the structural stability and crystallographic evolution of TNO-2D upon lithiation and delithiation and correlate the Li-ion diffusion kinetics with the lattice evolution during battery charge and ***,carbon-coated TNO-2D achieves enhanced rate capability(205 mAh·g^(-1) at 50 C)and long-term cycling stability(87%after 1000 cycles at 5 C).This work provides insights into the rational morphology design of electrode materials for accelerated charge transfer and enhanced fast-charging capability,pushing forward the development of electrode materials for high-power rechargeable batteries in future energy storage.

关键词： morphological dimension electrochemical kinetics lithium-ion batteries TiNb_(2)O_(7) structural evolution

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Design optimization and testing of a morphing leading-edge with a variable-thickness compliant skin and a closed-chain mechanism

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Chinese Journal of Aeronautics 2024年第7期37卷 285-300页

作者： Zhigang WANG Xiasheng SUN Yu YANG Wenjie GE Daochun LI Jinwu XIANG Panpan BAO Qi WU andrea DA RONCH School of Aeronautical Science and Engineering Beihang UniversityBeijing 100191China National Key Laboratory of Strength and Structural Integrity Aircraft Strength Research Institute of ChinaXi’an 710065China School of Aeronautics and Astronautics Shanghai Jiao Tong UniversityShanghai 200240China School of Mechanical Engineering Northwestern Polytechnical UniversityXi’an 710072China Faculty of Engineering and Physical Sciences University of SouthamptonSouthampton SO171JBUK

Climate warming and the increased demand in air travels motivate the aviation industry to urgently produce technological *** of the most promising innovations is based on the smoothly continuous morphing leading-edge *** study proposes a two-step process for the design of a morphing leading-edge,including the optimization of the outer variable-thickness composite compliant skin and the optimization of the inner kinematic *** the compliant skin design,an optimization of the variable thickness composite skin is proposed based on a laminate continuity model,with laminate continuity constraint and other manufacturing *** laminate continuity model utilizes a guiding sequence and a ply-drop sequence to describe the overall stacking sequence of plies in different thickness regions of the complaint *** the inner kinematic mechanism design,a coupled four-bar linkage system is proposed and optimized to produce specific trajectories at the actuation points on the stringer hats of the compliant skin,which ensures that the compliant skin can be deflected into the aerodynamically optimal ***,a morphing leading-edge is manufactured and *** results are compared with numerical predictions,confirming the feasibility of the morphing leading-edge concept and the overall proposed design approach.

关键词： Optimization Design Morphing wing Compliant skin Kinematics Leading-edge Control surfaces

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