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Liquid suspensions of single and binary component solid particles-An overview

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China Particuology 2007年第5期5卷 312-320页

作者： renzo Di Felice Dipartimento di Ingegneria Chimica e di Processo "G.B. Bonino" Università degli Studi di Genovavia Opera Pia1516145 GenovaItaly

In this paper theoretical approaches and experimental findings relative to the hydrodynamics of liquid suspensions of solid particles by liquids are reported and discussed. For the single particle specie systems, advantages and possible faults of well known empirical correlations are discussed. For binary-solid mixture suspensions, experimental evidence are reviewed and approaches capable of successfully describing observed behaviour are reported.

关键词： Sedimentation Fluidization Voidage function Binary-mixture

Kinetics study of CO_(2) absorption in potassium carbonate solution promoted by diethylenetriamine

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Green Energy & Environment 2021年第1期6卷 83-90页

作者： Rouzbeh Ramezani renzo Di Felice Department of Civil Chemical and Environmental EngineeringUniversity of GenoaVia Opera Pia 1516145GenovaItaly

In this work,characterization and kinetics of CO2 absorption in potassium carbonate(K_(2)CO_(3))solution promoted by diethylenetriamine(DETA)were *** measurements were performed using a stirred cell reactor in the temperature range of 303.15–323.15 K and total concentration up to 2.5 kmol m*** density,viscosity,physical solubility,CO_(2) diffusivity and absorption rate of CO_(2) in the solution were *** reaction kinetics between CO_(2) and K2CO3þDETA solution were ***-first order kinetic constants were also predicted by zwitterion *** was revealed that the addition of small amounts of DETA to K_(2)CO_(3) results in a significant enhancement in CO_(2) absorption *** reaction order and activation energy were found to be 1.6 and 35.6 kJ mol1,*** terms of reaction rate constant,DETA showed a better performance compared to the other promoters such as MEA,EAE,proline,arginine,taurine,histidine and alanine.

关键词： Gas absorption CO_(2)capture Reaction rate constant Kinetic study Absorption rate

Validation of fluid-particle interaction force relationships in binary-solid suspensions

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Particuology 2015年第6期13卷 40-48页

作者： Marco Rotondi renzo Di Felice Paolo Pagliai Department of Civil Chemical and Environmental Engneering University of Genova Via Opera Pia 15 16145 Genova Italy

In this work several relationships governing solid-fluid dynamic interaction forces were validated against experimental data for a single particle settling in a suspension of other smaller particles. It was observed that force relationships based on Lattice-Boltzmann simulations did not perform as well as other inter- action types tested. Nonetheless, it is apparent that, in the case of a suspension of different particle types, it is important that the correct choice is made as to how the contribution to the overall fluid-particle interaction force is split between buoyancy and drag. Experimental evidence clearly suggests that the ＂generalized＂ Archimedes＇ principle （where the foreign particle is considered to displace the whole suspension and not just the fluid） provides the best result.

关键词： Solid-fluid suspensionsSolid-fluid interaction forcesDrag forceBuoyancy force

Preface to special topic on information and intelligent metasurfaces

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National Science Review 2023年第8期10卷 7-8页

作者： Tie Jun Cui Marco Di renzo Southeast University Université Paris-Saclay

In the past decades, information science and technology has developed rapidly, but has also encountered some *** further development requires some original driving force of underlying physics(such as quantum mechanics...

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Decline of Traditional Landscape in a Protected Area of the Southwestern Alps:the Fate of Enclosed Pasture Patches in the Land Mosaic Shift

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Journal of Mountain Science 2014年第2期11卷 544-554页

作者： Matteo GARBARINO Emanuele SIBONA Emanuele LINGUA renzo MOTTA Department of Agricultural Food and Environmental Sciences (D3A) Università Politecnica delle MarcheVia delle Brecce BiancheI-60131 AnconaItaly Department of Agriculture Forest and Food Sciences (DISAFA) University of Torino Via L. da Vinci 44 I-10095 Grugliasco TO Italy Department of Land and Agro-Forestry Systems (TESAF) University of Padova Agripolis Viale dell'Università 16 I-35020 Legnaro PD Italy

【Title】【Author】【Addresses】1Traditional landscape elements such as pasture patches enclosed in a forest matrix are progressively disappearing throughout the European Alps. We assessed the land mosaic shift of a protected area located in the western Italian Alps. In particular, the dynamics of pasture patches were studied at both landscape and stand level. Land-cover mapping through object-oriented analysis of historical aerial photographs was used to assess land-cover changes between 1954 and 2000. Spatial statistics were used to quantify landscape patterns, and field samplings within pasture patches were used to explore tree regeneration structure and composition. Our results showed a significant increase in the number of pasture patches caused by their fragmentation following forest expansion. The total surface area of pasture patches decreased by 43% and their core area decreased by 94%. The encroachment of trees on less accessible areas of the pasture patches caused a reduction of patch shape at landscape scale. The gap filling process started 40-50 years ago and began with an early invasion of light demanding species like sycamore maple （Acer pseudoplatanus L.） and common ash （Fraxinus excelsior L.）, followed by European beech （Fagus sylvatica L.） and secondarily silver fir （Abies alba Mill.）. Traditional land-use and population decline in the Pesio Valley led to a reduction in ecotone areas. A transition to a more homogeneous landscape is expected in the next decades. Given the cultural and productive nature of these mountain meadow-pasture communities, extensive livestock grazing systems could be used to manage their future conservation.

关键词： Landscape structure Secondary succession Historical ecology Pesio Valley Traditional land-use

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renzo Piano

Renzo Piano

Properties of agricultural aerosol released during wheat harvest threshing,plowing and sowing

作者： (author.)Piano renzo (writer of foreword.)Frampton Kenneth

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Journal of Environmental Sciences 2014年第9期26卷 1903-1912页

作者： Chiara Telloli Antonella Malaguti Mihaela Mircea renzo Tassinari Carmela Vaccaro Massimo Berico ENEA National Agency for New TechnologiesEnergy and Sustainable Economic DevelopmentVia Martiri di Monte Sole 4Bologna 40129Italy Department of Earth Science Ferrara UniversityItaly

This study shows for the first time a chemical and morphological characterization of agricultural aerosols released during three important agricultural operations： threshing, plowing and sowing. The field campaigns were carried out in the eastern part of the Po Valley, Italy, in summer and autumn 2009. The aerosol particles were sampled on quartz fiber filters and polytetrafluoroethylene membranes in order to allow Inductively Coupled Plasma Mass Spectrometry （ICP-MS） analysis and Scanning Electron Microscopy equipped with an Energy Dispersive X-ray Spectrometer （SEM-EDS） investigations, respectively. The organic carbon mass concentrations were measured with a Sunset Laboratory Dual-Optical Organic Carbone/Elemental Carbon （OCEC） Aerosol analyzer. The morphological and chemical analyses by SEM-EDS allowed recognizing four main particle classes： organic, silica, calcite and clay minerals. The organic particles contribute to both fine and coarse aerosol fractions up to ca. 50% for all three agricultural activities. This was also confirmed by OCEC analysis for fine fraction. Most of the agricultural aerosols, about 60%, were single particles and the remaining 40% were agglomerations of particles. The ICP-MS results showed that threshing and plowing produce more aerosol particles than sowing, which was characterized by important amounts of clay minerals produced from land soils.

关键词： AerosolAgricultureSEM-EDSICP-MS and OCEC analyses

Alternative stable states in mountain forest ecosystems： the case of European larch(Larix decidua) forests in the western Alps

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Journal of Mountain Science 2017年第5期14卷 811-822页

作者： Jose V.MORIS Giorgio VACCHIANO Davide ASCOLI renzo MOTTA University of Turin DISAFALargo Paolo Braccini 210095 Grugliasco(TO)Italy

European larch(Larix decidua) forests of the western Alps form extensivecultural landscapes whose resilience to global changes is currently unknown. Resilience describes the capacity of ecological systems to maintain the same state, i.e., the same function, processes, structure, and composition despite disturbances, environmental changes and internal fluctuations. Our aim is to explore the resilience of larch forests to changes in climate and land use in the western Italian *** do so, we examined whether larch forests can be described as an alternative stable state in mountain forest ecosystems. We used tree basal area data obtained from field forest inventories in combination with topography, forest structure, land use, and climate information. We applied three different probabilistic methods: frequency distributions, logistic regressions, and potential analyses to infer the resilience of larch forests relative to that of other forest *** found patters indicative of alternative stable states: bimodality in the frequency distribution of the percent of larch basal area, and the presence of an unstable state, i.e., mixed larch forests, in the potential analyses. We also found:(1) high frequency ofpurelarchforestsathighelevation,(2)the probability of pure larch forests increased mostly with elevation, and(3) pure larch forests were a stable state in the upper montane and subalpine *** study shows that the resilience of larch forests may increase with elevation, most likely due to the altitudinal effect on climate. Under the same climate conditions, land use seems to be the main factor governing the dominance of larch forests. In fact, subalpine larch forests may be more resilient, and natural succession after land abandonment, e.g., towards Pinuscembra forests, seems slower than in montane larch forests. In contrast, in the upper montane belt only intense land use regimes characterized by open canopies and forest grazing may maintain larch *** con

关键词： Resilience Ecosystem bistability Elevation Land use Natural succession Pinuscembra European larch

Is current clinical practice modified about intraoperative breast irradiation?

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Chinese Journal of Cancer Research 2016年第2期28卷 146-149页

作者： Michela Massa Simonetta Franchelli renzo Panizza Tiberio Massa Plastic and Reconstructive Surgery SS.Antonio e Biagio e Cesare Arrigo Hospital Plastic and Reconstructive Surgery IRCCS AOU San Martino-ISTNational Institute of Cancer Research Diagnostic Mammography Department IRCCS AOU San Martino-ISTNational Institute of Cancer Research

After the results obtained in the two randomized clinical trial, the ELIOT trial and the TARGIT-A trial, a heated debate is going on concerning the question of applying intraoperative radiotherapy （IORT） instead of postoperative whole breast irradiation （WBI） after breast conservative treatment. Currently, many centers are applying the IORT following the strict selection criteria dictated by the working groups American Society for Radiation Ontology （ASTRO） and Groupe Europeen de Curietherapie-European Society for Therapeutic Radiology and Oncology （GEC-ESTRO） and monitoring the oncological outcome together with radiation toxicity on breast tissue. The clinical experience of the Geneva University Hospital regarding the use of the Intrabeam system is evaluated and compared with current evidences.

关键词： Breast cancer intraoperative radiotherapy (IORT) radiation toxicity