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A semi-empirical model for top-down cracking depth evolution in thick asphalt pavements with open-graded friction courses

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Journal of Traffic and Transportation Engineering(English Edition) 2022年第2期9卷 244-260页

作者： Francesco Canestrari lorenzo Paolo Ingrassia Amedeo Virgili Dipartimento di Ingegneria Civile Edile e Architettura(DICEA)UniversitàPolitecnica delle MarcheAncona 60131Italy

Thick asphalt pavements with open-graded friction course(OGFC) are exposed to topdown cracking(TDC), a distress consisting of longitudinal cracks that initiate on the pavement surface close to the wheel path and propagate downwards. The main objective of this study is to develop a semi-empirical model for the prediction of TDC depth evolution for such pavements. For this purpose, a series of cores were taken from different Italian motorway pavements affected by TDC and analyzed in the laboratory. Cracked cores taken from the wheel path area were analyzed to determine TDC depth, whereas intact cores taken from the middle of the lane(not affected by traffic loadings) were tested to obtain the volumetric and mechanical properties of the OGFC mixture. The proposed model, developed on the basis of the results already available in literature and on the findings of the laboratory investigation, predicts the evolution of TDC depth as a function of the applied traffic loadings(in terms of 12-ton fatigue equivalent single axle loads, i.e., ESALs). The model is sigmoidal with a maximum TDC depth assumed equal to 150 mm. The shape parameter of the sigmoidal function depends on the indirect tensile strength(ITS) of the OGFC mixtures(which takes into account indirectly also the volumetrics and stiffness of the OGFC), whereas the evolutive translation factor depends on the age of the OGFC mixture. After excluding some outliers, the model was able to predict the measured TDC depth very well. Moreover, in-situ observations allowed a preliminary validation of the proposed model. This model can be used in pavement management systems(PMSs) to plan surface repairs due to TDC in a timely manner, thus minimizing pavement damage and maintenance costs.

关键词： Top-down cracking(TDC) Asphalt pavement Open-graded friction course(OGFC) Porous asphalt(PA) Pavement management system(PMS) Modelling

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Equalization of a 10 Gbps IMDD signal by a small silicon photonics time delayed neural network

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Photonics Research 2023年第5期11卷 878-886页

作者： EMILIANO STAFFOLI MATTIA MANCINELLI PAOLO BETTOTTI lorenzo PAVESI Nanoscience Laboratory Department of PhysicsUniversity of Trento38123 TrentoItaly

A small 4-channel time-delayed complex perceptron is used as a silicon photonic neural network(PNN)device to compensate for chromatic dispersion in optical fiber *** PNN device is experimentally tested with nonreturn-to-zero optical signals at 10 Gbps after propagation through up to 125 km optical fiber *** the learning phase,a separation-loss function is optimized in order to maximally separate the transmitted levels of 0s from the 1s,which implies an optimization of the *** of the PNN device shows that the excess losses introduced by the PNN device are compensated by the gain in the transmitted signal equalization for a link longer than 100 *** measured data are reproduced by a model that accounts for the optical link and the PNN *** allows simulating the network performances for higher data rates,where the device shows improvement with respect to the benchmark both in terms of performance and ease of use.

关键词： network signal neural

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Gallbladder biliary lithotripsy:A new rationale applied to old treatment

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World Journal of Gastroenterology 2022年第7期28卷 763-765页

作者： lorenzo Dioscoridi Massimiliano Mutignani Digestive Endoscopy Unit ASST NiguardaMilan 20100Italy

Pure endoscopic treatment of combined cholelithiasis and choledocholithiasis is possible due to the chance to use together both endoscopic retrograde cholangiopancreatography(ERCP)and endoscopic ultrasound(EUS)*** endotherapy permits to treat biliary stones in the main bile duct by standard ERCP and gallbladder stones by EUS-guided cholecystoduodenostomy eventually associated to intracorporeal lithotripsy to achieve optimal results.

关键词： Endoscopic ultrasound-guided gallbladder drainage Biliary lithotripsy Gallstone lithotripsy Gallbladder biliary lithotripsy New rationale

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Transient global amnesia and stroke: not that benign?

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Stroke & Vascular Neurology 2022年第2期7卷 92-93页

作者： Michele Romoli lorenzo Muccioli Neurology and Stroke Unit Department of NeuroscienceMaurizio Bufalini HospitalCesenaItaly Neurology Clinic University of Perugia-S.Maria della Misericordia HospitalPerugiaItaly Dipartimento di Scienze Biomediche e Neuromotorie Universitàdi BolognaBolognaItaly

After more than 50 years since Fisher and Adams’original description in 1964,1 transient global amnesia(TGA)is still a puzzling *** time,several mechanisms have been proposed for TGA pathogenesis,including venous congestion,cortical spreading depression,seizures and arterial ischaemia.2–4 A sufficient amount of studies in favour and against each of these mechanisms has emerged,fostering uncertainty regarding aetiology as well as *** this extent,most of the controversy stands on whether TGA represents a risk factor for stroke,or whether this is just as benign as originally thought.

关键词： arterial pathogenesis transient

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p-Multilevel Preconditioners for HHO Discretizations of the Stokes Equations with Static Condensation

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Communications on Applied Mathematics and Computation 2022年第3期4卷 783-822页

作者： lorenzo Botti Daniele A.Di Pietro Department of Engineering and Applied Sciences University of BergamoBergamoItaly IMAG Univ MontpellierCNRSMontpellierFrance

We propose a p-multilevel preconditioner for hybrid high-order(HHO)discretizations of the Stokes equation,numerically assess its performance on two variants of the method,and compare with a classical discontinuous Galerkin *** efficient implementa-tion is proposed where coarse level operators are inherited using L2-orthogonal projec-tions defined over mesh faces and the restriction of the fine grid operators is performed recursively and *** h-and k-dependency are investigated tackling two-and three-dimensional problems on standard meshes and graded *** the two HHO for-mulations,featuring discontinuous or hybrid pressure,we study how the combination of p-coarsening and static condensation influences the V-cycle *** particular,two dif-ferent static condensation procedures are considered for the discontinuous pressure HHO variant,resulting in global linear systems with a different number of unknowns and matrix non-zero ***,we show that the efficiency of the solution strategy might be impacted by static condensation options in the case of graded meshes.

关键词： Stokes equations Divergence free constraint Hybrid high-order Discontinuous Galerkin p-multigrid Static condensation

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自然地理学与人文地理学的关系：以史为鉴

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热带地理 2024年第1期44卷 1-12页

作者：克里斯蒂安·凯斯特洛特洛伦佐·巴尼奥利丁雁南比利时鲁汶大学地球与环境科学系意大利米兰比可卡大学社会学与社会研究系复旦大学历史地理研究中心

简要回顾19世纪以来地理学术史可见，自然地理学和人文地理学在过去从未曾统一过，至少在如今论证地理学在应对人类所面临的各类问题的过程中有其用武之地时所追求的那种形式上是如此。不过，自然地理学已开始认识到实证主义的局限，这... 详细信息

简要回顾19世纪以来地理学术史可见，自然地理学和人文地理学在过去从未曾统一过，至少在如今论证地理学在应对人类所面临的各类问题的过程中有其用武之地时所追求的那种形式上是如此。不过，自然地理学已开始认识到实证主义的局限，这为解决眼下正在影响我们星球的一些紧迫问题开启了一条合作路径。文章在结尾部分以实例展示自然地理学与人文地理学合作的可能状态，倡导学界多关注政治-地志学取径，将地区在权力结构内部和外部的关系纳入考量，从而集中探讨世界范围内区域的多样性。

关键词：人文地理学自然地理学地志学后实证主义

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Increasing temperatures affect multiyear life cycle of the outbreak bush-cricket Barbitistes vicetinus(Orthoptera,Tettigoniidae)

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Insect Science 2023年第2期30卷 530-538页

作者： Giacomo Ortis lorenzo Marini Giacomo Cavaletto Luca Mazzon Department of Agronomy FoodNatural resourcesAnimals and Environment(DAFNAE)University of PaduaLegnaroItaly

Although outbreaks of rare species are unusual,several insect species have become emerging pests probably due to the ongoing environmental *** vicetinus was first described in 1993 as an endemic bush-cricket of north-east Italy and was considered rare until 2008,when it became an established pest,causing severe damages to forests and *** possible role of temperature in changing its life cycle has still to be fully ***,we explored the effect of summer temperature on egg diapause and the effect of winter temperature on egg *** observations showed that the proportion of embryos that can complete development at the end of summer ranged from zero to nearly 90% depending on summer temperatures.A substantial shift in the rate of development from 20% to nearly 80% occurred in a thermal range of about 1℃.On the contrary,overwinter egg survival was high and constant(90%)across a wide range of winter temperatures that go well beyond both the cold and warm thermal limits of the current species ***,the results suggest a potential key role of summer temperature warming on the outbreak propensity of this species that is able to switch from a multiyear to an annual life cycle with just a 1-2℃ warming.

关键词： climate change diapauses global warming overwinter survival pest pluriannualcycle

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Application of homotopy perturbation method to the radial thrust problem

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Astrodynamics 2023年第2期7卷 251-258页

作者： lorenzo Niccolai Alessandro A.Quarta Giovanni Mengali Department of Civil and Industrial Engineering University of PisaI-56122Italy

The dynamics of a spacecraft propelled by a continuous radial thrust resembles that of a nonlinear *** is analyzed in this work with a novel method that combines the definition of a suitable homotopy with a classical perturbation approach,in which the low thrust is assumed to be a perturbation of the nominal Keplerian *** homotopy perturbation method provides the analytical(approximate)solution of the dynamical equations in polar form to estimate the corresponding spacecraft propelled trajectory with a short computational *** accuracy of the analytical results was tested in an orbital-targeting mission scenario.

关键词： radial thrust homotopy perturbation method nonlinear oscillator trajectory approximation

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Empowering digital twins with eXtended reality collaborations

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Virtual Reality & Intelligent Hardware 2022年第6期4卷 487-505页

作者： lorenzo STACCHIO Alessia ANGELI Gustavo MARFIA Department for Life Quality Studies University of BolognaItaly Department of Computer Science and Engineering University of BolognaItaly Department of the Arts University of BolognaItaly

Background The advancements of Artificial Intelligence,Big Data Analytics,and the Internet of Things paved the path to the emergence and use of Digital Twins(DTs)as technologies to“twin”the life of a physical entity in different fields,ranging from industry to *** the same time,the advent of eXtended Reality(XR)in industrial and consumer electronics has provided novel paradigms that may be put to good use to visualize and interact with *** technologies can support human-to-human interactions for training and remote assistance and could transform DTs into collaborative intelligence *** We here present the Human Collaborative Intelligence empowered Digital Twin framework(HCLINT-DT)integrating human annotations(e.g.,textual and vocal)to allow the creation of an all-in-one-place resource to preserve such *** framework could be adopted in many fields,supporting users to learn how to carry out an unknown process or explore others’past *** The assessment of such a framework has involved implementing a DT supporting human annotations,reflected in both the physical world(Augmented Reality)and the virtual one(Virtual Reality).Con-clusions The outcomes of the interface design assessment confirm the interest in developing HCLINT-DT-based ***,we evaluated how the proposed framework could be translated into a manufacturing context.

关键词： Digital twin eXtended reality Human collaborative intelligence

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算法如何重塑劳动力剥削:对平台经济中劳动不可见化过程的审视

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求是学刊 2024年第2期51卷 1-16页

作者： [爱]洛伦佐·西尼刘歆(译) 刘明明(译) 亓为康(译) 都柏林大学商学院《工作、就业和社会》编委会南开大学马克思主义学院天津300350

马克思认为,劳动力在劳动过程中的生产性消费是价值创造的主要来源。资本家试图掩盖并获得工人对生产过程的贡献,而工人力图使他们的贡献得到充分承认。因此,资本与劳动的对抗建立在无酬劳动时间的占有和剥削之上。在当代资本主义社会中... 详细信息

马克思认为,劳动力在劳动过程中的生产性消费是价值创造的主要来源。资本家试图掩盖并获得工人对生产过程的贡献,而工人力图使他们的贡献得到充分承认。因此,资本与劳动的对抗建立在无酬劳动时间的占有和剥削之上。在当代资本主义社会中,这种不可见化过程仍然是一种剩余价值获取的相关方式,尤其是在平台经济中,其特点在于通过算法进行远程但无处不在的控制。重新发现这种剩余价值获取方式及其在平台劳动中的表现,将有助于对工作过程转型和剩余价值创造之间的关系有一个新的认识。

关键词：资本劳动不可见化劳动力劳动时间占有平台工作价值

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