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哈尔滨工程大学学报（英文版） 2024年第2期23卷 316-326页

作者： F.mannacio F.Di marzo m.Gaiotti C.m.Rizzo m.venturini Italian Navy Naval Support and Experimentation CentreCSSN Viale S.Bartolomeo40019126 La Spezia(Italy) University of Genova Polytechnic SchoolDITEN Via Montallegro116145 Genova(Italy).

Despite the non-contact underwater explosion phenomena(UNDEX)have been studied for decades and several numerical methods have been proposed in literature,its effects on military structures,especially composite ones,are even nowadays matter of *** early design phases,it is not always possible to verify the shock resistance of hull structures modelling the whole phenomenon,in which fluid,gas and solid properties must be properly set in a fully coupled fluid-structure interaction(FSI)numerical *** ones are extremely complex to set,computationally demanding and certainly not suitable for everyday design *** this paper,a simplified finite element(FE)model,easy to use in an early design phase,is ***,the structure and the fluid are *** this approximation,the fluid behaviour is simplified,using special finite elements,available in a commercial software *** choice reduces the computational time and numerical efforts avoiding the problem of combining computational fluid dynamics(CFD)and FE domains and equations in a fully coupled fluid-structure interaction model.A typical parallel body block of a minesweeper is modelled,using two-dimensional multi-layered shell elements to properly account for the composite materials *** the fluid instead,three dimensional volumetric elements,directly coupled to the structural elements,are *** addition,the same calculation is performed,modelling separately fluid in the CFD environment and structures in the finite element ***,realizing a fully coupled fluid-structure interaction *** results obtained by applying both numerical models are compared with the structural response measured on board of a composite ship during a full-scale shock *** simplified proposed procedure provides results in satisfactory agreement with experiments,allowing the validation of the *** are discussed and differences with the real phenomenon and fully coupled CFD+

关键词： Underwater explosions Shock resistance Composites Fluid-structure interaction Experimental analysis Numerical simulation Vulnerability Preliminary design

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Design and field measurements of printed-circuit quadrupoles and dipoles

Design and field measurements of printed-circuit quadrupoles...

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作者： S．Bernal T.Godlove R．A．Kishek P.G．O’Shea m．Reiser m.venturini

Air-core printed-circuit (PC) quadrupoles and dipoles have been developed for the University of maryland electron ring, currently under construction. The quadrupoles and dipoles are characterized by very small magnetic fields (about 15 G at the aperture edge) and small aspect ratios (length/diameter <1). We review the theory behind the design of the PC lenses and integrated field gradient as functions

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Effect of stepover and torch tilting angle on a repair process using WAAm

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Advances in manufacturing 2022年第4期10卷 541-555页

作者： Francesco Baffa Giuseppe venturini Gianni Campatelli Emanuele Galvanetto Department of Industrial Engineering University of FlorenceFlorenceItaly

To sustain the transition to a greener economy and greener manufacturing,it is necessary to develop new approaches and technologies to repair metal components;this will result in a drastic reduction in energy and material *** this study,wire arc additive manufacturing(WAAm)was used to deposit a layer of new material on an existing surface,with the objective of finding the optimal configuration that maximized the layer quality and material *** parameters considered are the stepover among the deposited beads and the inclination of the torch with respect to the repaired *** inclination angle is crucial when repairing complex surfaces,like those of a mold,owing to accessibility issues,the torch cannot be maintained orthogonal to the surfaces along the entire *** configurations were tested in order to assess the quality of the materials in terms of the presence of material voids,depth of penetration,and the heat affected zone(HAZ)and to understand the effects of these variables on the material efficiency and thickness of the repairing *** should be noted that by adopting deposition parameters set to have a low heat input,the use of a tilting angle has beneficial effects on the quality of the deposited layer and the process *** and geometrical measurements were carried out to assess the effect of these two variables depositing a layer of plain carbon steel.

关键词： Wire arc additive manufacturing(WAAm) Repairing·Torch inclination Stepover Remanufacturing

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Nonlinear forced vibration in a subcritical regime of a porous functionally graded pipe conveying fluid with a retaining clip

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Applied mathematics and mechanics(English Edition) 2025年第1期46卷 101-122页

作者： m.GHOLAmI m.EFTEKHARI Department of mechanical Engineering Shahid Bahonar University of Kerman

This study examines the nonlinear behaviors of a clamped-clamped porous pipe made of a functionally graded material(FGm) that conveys fluids and is equipped with a retaining clip, focusing on primary resonance and subcritical dynamics. The nonlinear governing equations for the FGm pipe are derived by the extended Hamilton's principle, and subsequently discretized through the application of the Galerkin *** direct method of multi-scales is then used to solve the derived equations. A thorough analysis of various parameters, including the clip stiffness, the power-law index, the porosity, and the clip location, is conducted to gain a comprehensive understanding of the system's nonlinear dynamics. Through the analysis of the first natural frequency, the study highlights the influence of the flow velocity and the clip stiffness, while the comparisons with metallic pipes emphasize the role of FGm composition. The examination of the forced response curves reveals saddle-node bifurcations and their dependence on parameters such as the detuning parameter and the power-law index, offering valuable insights into the system's nonlinear resonant behavior. Furthermore, the frequency-response curves illustrate the hardening nonlinearities influenced by factors such as the porosity and the clip stiffness, revealing nuanced effects on the system response and resonance characteristics. This comprehensive analysis enhances the understanding of nonlinear behaviors in FGm porous pipes with a retaining clip, providing key insights for practical engineering applications in system design and optimization.

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High-speed tracked vehicle model order reduction for static and dynamic simulations

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Defence Technology（防务技术） 2024年第8期38卷 89-110页

作者： Luca Dimauro Simone venturini Antonio Tota Enrico Galvagno mauro Velardocchia Department of mechanical and Aerospace Engineering Politecnico di TorinoCorso Duca degli Abruzzi2410129TorinoItaly

In this paper, a model order reduction strategy is adopted for the static and dynamic behaviour simulation of a high-speed tracked vehicle. The total number of degree of freedom of the structure is condensed through a selection of interface degrees of freedom and significant global mode shapes, for an approximated description of vehicle dynamic behaviour. The methodology is implemented in a customised open-source software to reduce the computational efforts. The modelled tracked vehicle includes the sprung mass, the unsprung masses, connected by means of torsional bars, and all the track assemblies, composing the track chain. The proposed research activity presents a comprehensive investigation of the influence of the track chain, combined with longitudinal vehicle speed, on statics and vehicle dynamics, focusing on vertical dynamics. The vehicle response has been investigated both in frequency and time domain. In this last case road-wheel displacements are assumed as inputs for the model, under different working conditions, hence considering several road profiles with different amplitudes and characteristic excitation frequencies. Simulation results have proven a high fidelity in model order reduction approach and a significant contribution of the track chain in the global dynamic behaviour of the tracked vehicle.

关键词： Tracked vehicle dynamics Rubber characteristics Component mode synthesis modal analysis Open-source

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Cat scratch disease in childhood: a 10-year experience of an Italian tertiary care children’s hospital

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World Journal of Pediatrics 2023年第2期19卷 189-193页

作者： Lara Fusani Elisabetta venturini Elena Chiappini Luisa Galli Postgraduate School of Pediatrics University of FlorenceMeyer Children’s HospitalFlorenceItaly Infectious Diseases Unit Meyer Children’s HospitalViale Pieraccini 24FlorenceItaly Department of Health Sciences University of FlorenceFlorenceItaly

Cat scratch disease(CSD),an infection caused by Bartonella henselae,is uncommon in Europe,whereas 24,000 cases per year have been reported in the United States[1,2].The typical manifestation of CSD consists of fever and subacute,solitary or regional,painful and self-limited lymphadenopathy in a patient with a history of previous scratching,biting,or contact with a kitten or cat[3].In 85%of patients,only one regional lymph node is involved,which is located in the axillary and epitrochlear regions in approximately half of the cases[4,5].One or more round,red-brown nontender papules can develop at the inoculation site or near the scratch after a few days and may persist until two to three weeks[6].

关键词： Italian scratch Barton

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International migration Policies： Should They Be A New G20 Topic？

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China & World Economy 2016年第4期24卷 93-110页

作者： Andrea Goldstein Alessandra venturini managing Director NOMISMA Bologna Italy. Professor University of Turin and Deputy Director Migration Policy Center European University Institute Florence Italy

International migration should be a core subject for global governance, given its transnational nature, and yet it is its ＂ugly duckling＂ and the global community has shied away from taking any concrete action to regulate cross-border flows of people, at least until 2015, when the refugee crisis in the mediterranean prompted Turkey to include migration in the Antalya agenda. It is unlikely that the international community will move beyond the current consensus based on humanitarian principles and recognize that the free flow of people is a right, on the same level as trade and capital liberalization. At the same time, much of the criticism of migration policies is misplaced.＂ efforts shoum be focused on improving the implementation of existing policies and fine-tune these policies in relation to entrance and integration, preferably in cooperation with the country of origin. The G20 should play a leading role in facilitating such coordination, also taking into account the increasing importance of South-South migration （such as the migration of Chinese citizens to Africa）.

关键词： G20 migration population growth refugees

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Neurogenesis dynamics in the olfactory bulb:deciphering circuitry organization, function, and adaptive plasticity

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Neural Regeneration Research 2025年第6期20卷 1565-1581页

作者： moawiah m.Naffaa Department of Psychology and Neuroscience Duke UniversityDurhamNCUSA Department of Cell Biology Duke University School of MedicineDurhamNCUSA

Adult neurogenesis persists after birth in the subventricular zone, with new neurons migrating to the granule cell layer and glomerular layers of the olfactory bulb, where they integrate into existing circuitry as inhibitory interneurons. The generation of these new neurons in the olfactory bulb supports both structural and functional plasticity, aiding in circuit remodeling triggered by memory and learning processes. However, the presence of these neurons, coupled with the cellular diversity within the olfactory bulb, presents an ongoing challenge in understanding its network organization and function. moreover,the continuous integration of new neurons in the olfactory bulb plays a pivotal role in regulating olfactory information processing. This adaptive process responds to changes in epithelial composition and contributes to the formation of olfactory memories by modulating cellular connectivity within the olfactory bulb and interacting intricately with higher-order brain regions. The role of adult neurogenesis in olfactory bulb functions remains a topic of debate. Nevertheless, the functionality of the olfactory bulb is intricately linked to the organization of granule cells around mitral and tufted cells. This organizational pattern significantly impacts output, network behavior, and synaptic plasticity, which are crucial for olfactory perception and memory. Additionally, this organization is further shaped by axon terminals originating from cortical and subcortical regions. Despite the crucial role of olfactory bulb in brain functions and behaviors related to olfaction, these complex and highly interconnected processes have not been comprehensively studied as a whole. Therefore, this manuscript aims to discuss our current understanding and explore how neural plasticity and olfactory neurogenesis contribute to enhancing the adaptability of the olfactory system. These mechanisms are thought to support olfactory learning and memory, potentially through increased

关键词： network adaptability neurogenesis neuronal communication olfactory bulb olfactory learning olfactory memory synaptic plasticity

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mitochondria–cGAS–STING axis is a potential therapeutic target for senescence-dependent inflammaging-associated neurodegeneration

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Neural Regeneration Research 2025年第3期20卷 805-807页

作者： Josém.Izquierdo Centro de Biología molecular Severo Ochoa(CBm) Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid(CSIC-UAM)MadridSpain

The word “senescence” comes from the Latin senescens, meaning “to begin to age”, and is characterized by a long-lasting but reversible block in proliferation, resulting from stress-induced cell cycle arrest of pre... 详细信息

关键词： Latin potential lasting

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A survey on automatic dashboard recommendation systems

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Visual Informatics 2024年第1期8卷 67-79页

作者： Praveen Soni Cyril de Runz Fatma Bouali Gilles venturini LIFAT University of Tours64 avenue Jean PortalisTours37200France IUT C University of Lille53 Rue de l’AlmaRoubaix59100France

This paper presents a survey on automatic or semi-automatic recommendation systems that help users create *** starts by showing the important role that dashboards play in data science,and gives an informal definition of dashboards,i.e.,a set of visualizations possibly with linkage,a screen layout and user *** are mainly interested in systems that use a fully or partially automatic mechanism to recommend dashboards to *** automation includes the suggestion of data and visualizations,the optimization of the layout and the use of user *** position our work with respect to existing *** from a set of over 1000 papers,we have selected and analyzed 19 papers/systems along several *** main dimensions were the set of considered visualizations,the suggestion method,the utility/objective functions,the layout,and the user *** conclude by highlighting the main achievements in this domain and by proposing perspectives.

关键词： Automatic visualization Dashboard recommendation multiple view interfaces

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