检索结果-南通市图书馆

Thermal and Electrical Modelling of a CPV/T System Varying Its Configuration

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2019年第1期28卷 123-132页

作者： RENNO carlo Department of Industrial Engineering University of Salerno

In this paper, the main aim is the performances modelling from the electrical and thermal point of view of a concentrating photovoltaic and thermal(CPV/T) system in order to evaluate the primary energy and economic savings respect to a traditional system, when the same energy loads are satisfied. This study is realized by both varying the CPV/T system configuration and considering two different users. In particular, the point-focus(PF), and linear focus(LF) configurations of the CPV/T system are considered in order to match the residential user and hotel energy loads. The CPV/T system is sized adopting as input data: the Direct Normal Irradiance(DNI) modelled by an artificial neural network and the users' energy demands. In these hypotheses, the performances of the PF and LF systems are evaluated and then compared for the two users located in Southern Italy, in terms of electrical and thermal energy production, cells number, space occupied, energy and economic savings and CO2 emissions avoided. Finally, the PF system shows a lower simple pay-back and a higher primary energy saving, while the space occupied by a LF system results to be lower respect to the PF configuration.

关键词： CPV/T system point-focus configuration linear focus configuration thermal analysis electrical analysis primary energy saving economic analysis

Locomotor adaptations in Plio-Pleistocene large carnivores from the Italian Peninsula： Palaeoecological implications

在线全文

学校读者我要写书评

暂无评论

Current Zoology 2011年第3期57卷 269-283页

作者： carlo MELORO Hull York Medical School The University of Hull Loxley Building Cottingham Road Hull HU6 7RX UK

Mammalian carnivores are rarely considered for environmental reconstructions because they are extremely adaptable and their geographic range is usually large. However, the functional morphology of carnivore long bones can be indicative of locomotor behaviour as well as adaptation to specific kind of habitats. Here, different long bone ratios belonging to a subsample of extant large carnivores are used to infer palaeoecology of a comparative sample of Plio-Pleistocene fossils belonging to Italian paleo-communities. A multivariate long bone shape space reveals similarities between extant and fossil carnivores and multiple logistic regression models suggest that specific indices （the brachial and the Mt/F） can be applied to predict adaptations to grassland and tropical biomes. These functional indices exhibit also a phylogenetic signal to different degree. The brachial index is a significant predictor of adaptations to tropical biomes when phylogeny is taken into account, while Mt/F is not correlated anymore to habitat adaptations. However, the proportion of grassland-adapted carnivores in Italian paleo-communities exhibits a negative relationship with mean oxygen isotopic values, which are indicative of past climatic oscillations. As climate became more unstable during the Ice Ages, large carnivore guilds from the Italian peninsula were invaded by tropical/closed-adapted species. These species take advantage of the temperate forest cover that was more spread after 1.0 Ma than in the initial phase of the Quaternary （2.0 Ma） when the climate was more arid [Current Zoology 57 （3）： 269-283, 2011].

关键词： Carnivora Long bones Quaternary Climate change

Fat or fillers:The dilemma in eyelid surgery

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2024年第17期12卷 2951-2965页

作者： Giovanni Miotti Luca De Marco Davide Quaglia Martina Grando carlo Salati Leopoldo Spadea Caterina Gagliano Mutali Musa Pier Luigi Surico Pier Camillo Parodi Marco Zeppieri Department of Plastic Surgery University Hospital of UdineUdine 33100Italy Department of Internal Medicine Azienda Sanitaria Friuli OccidentaleSan Vito al Tagliamento 33078Italy Department of Ophthalmology University Hospital of UdineUdine 33100Italy Eye Clinic Policlinico Umberto I“Sapienza”University of RomeRome 00142Italy Department of Medicine and Surgery University of Enna“Kore”Enna 94100Italy Eye Clinic Catania University San Marco Hospital Viale Carlo Azeglio CiampiCatania 95121Italy Department of Optometry University of BeninBenin 300283Nigeria Department of Ophthalmology Africa Eye Laser CentreKm 7Benin 300105Nigeria Schepens Eye Research Institute of Mass Eye and Ear Harvard Medical SchoolBostonMA 02114United States

The aging of the periocular region has always aroused great interest.A fresh,young,and attractive sight determined an ever-greater attention to surgical and non-surgical techniques to obtain this *** particular,the change in the concept of a young look,considered then“full”,led to the increasing use of surgical(fat grafting)or medical(hyaluronic acid)filling *** rejuvenation became increasingly popular in the field of cosmetic treatments,with a focus on achieving a youthful and refreshed *** the various techniques available,the choice between using fat grafting or fillers presented a clinical *** particular,what surgery considered of fundamental importance was a long-lasting result over *** the other hand,aesthetic medicine considered it fundamental not to have to resort to invasive *** what was the reality?Was there one path better than the other,and above all,was there a better path for patients?The minireview aims to explore the physiopathology,diagnosis,treatment options,prognosis,and future studies regarding this *** analyzed the literature produced in the last 20 years comparing the two *** literature reveals advancements in biomaterials,stem cell research and tissue engineering held promise for further enhancing the field of eyelid *** choice between fat grafting and fillers in eyelid cosmetic treatments presented a clinical *** physiopathology,accurately diagnosing eyelid aging,exploring treatment options,assessing prognosis,and conducting future studies were essential for providing optimal care to patients seeking eyelid rejuvenation.

关键词： Stem cells Adipose stem cell Ocular therapy Oculoplastics Regenerative

Reliability based multiobjective optimization for design of structures subject to random vibrations

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第1期9卷 15-25页

作者： Giuseppe carlo MARANO Department of Environmental Engineering and Sustainable Development Technical University of Bari viale del Turismo 10-74100 Taranto Italy

Based on a multiobjective approach whose objective function (OF) vector collects stochastic reliability performance and structural cost indices, a structural optimization criterion for mechanical systems subject to random vibrations is presented for supporting engineer’s design. This criterion differs from the most commonly used conventional optimum design criterion for random vibrating structure, which is based on minimizing displacement or acceleration variance of main structure responses, without considering explicitly required performances against failure. The proposed criterion can properly take into account the design-reliability required performances, and it becomes a more efficient support for structural engineering decision making. The multiobjective optimum (MOO) design of a tuned mass damper (TMD) has been developed in a typical seismic design problem, to control structural vibration induced on a multi-storey building structure excited by nonstationary base acceleration random process. A numerical example for a three-storey building is developed and a sensitivity analysis is carried out. The results are shown in a useful manner for TMD design decision support.

关键词： Structural optimization Multiobjective optimization (MOO) Random vibration Tuned mass damper (TMD)

在线全文

学校读者我要写书评

暂无评论

以棋盘游戏重塑电动出行体验

景观设计 2024年第1期22卷 80-85页

作者： CRA-carlo Ratti Associati(文/图) 马建军(翻译) 杨庆鑫(翻译) 不详

该项目位于米兰植物园,并将植物园改造成一块大的游戏板。项目团队将其设计为一种易于上手、可以自由选择探索路线的冒险游戏,以游戏形式让人们了解并思考可持续发展的意义。项目采用可收集能量的地砖,可在白天和夜晚产生动态灯光和声... 详细信息

该项目位于米兰植物园,并将植物园改造成一块大的游戏板。项目团队将其设计为一种易于上手、可以自由选择探索路线的冒险游戏,以游戏形式让人们了解并思考可持续发展的意义。项目采用可收集能量的地砖,可在白天和夜晚产生动态灯光和声音效果。该项目由全球能源公司ENI开发,作为设计周INTERNI Re-evolution展览的一部分,向公众开放至2023年4月26日。

关键词：项目团队声音效果自由选择可持续发展的植物园游戏全球能源

The Drought of Amazonia in 2023-2024

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Climate Change 2024年第3期13卷 567-597页

作者： Jose A. Marengo Ana P. Cunha Jhan-carlo Espinoza Rong Fu Jochen Schöngart Juan C. Jimenez Mabel C. Costa Joao M. Ribeiro Sly Wongchuig Siyu Zhao National Center for Monitoring and Early Warning of Natural Disasters/CEMADEN So Jos dos Campos Brazil UNESP/CEMADEN So Jos dos Campos Brazil Graduate School of International Studies Korea University Seoul South Korea Institut des Gosciences de lEnvironnement (IGE) Institut de Recherche pour le Dvelopement (IRD) Saint Martin dHeres France Instituto de Investigacin sobre la Enseanza de las Matemticas (IREM PUCP) Pontificia Universidad Catlica del Per Lima Peru Department of Atmospheric and Oceanic Sciences University of California Los Angeles Los Angeles CA USA Departament of Environmental Dynamics Instituto Nacional de Pesquisas da Amaznia (INPA) Manaus Brazil Global Change Unit (GCU) of the Image Processing Laboratory (IPL) Universitat de Valncia Estudi General (UVEG) Paterna Spain Laboratoire dEtudes en Gophysique et Ocanographie Spatiales (LEGOS) Universit de Toulouse CNES/CNRS/IRD/UT3 Toulouse France

The Amazon basin has experienced an extreme drought that started in the austral summer of 2022-23 and extends into 2024. This drought started earlier than other previous droughts. Although some rain fell during the austral summer, totals remained below average. Higher temperatures during austral winter and spring 2023, which affected most of Central South America, then aggravated drought conditions. This coincided with an intense El Niño and abnormally warm tropical North Atlantic Ocean temperatures since mid-2023. Decreased rainfall across the Amazon basin, negative anomalies in evapotranspiration (derived from latent heat) and soil moisture indicators, as well as increased temperatures during the dry-to-wet transition season, September-October-November (SON) 2023, combined to delay the onset of the wet season in the hydrological year 2023-24 by nearly two months and caused it to be uncharacteristically weak. SON 2023 registered a precipitation deficit of the order of 50 to 100 mm/month, and temperatures +3˚C higher than usual in Amazonia, leading to reduced evapotranspiration and soil moisture indicators. These processes, in turn, determined an exceptionally late onset and a lengthening of the dry season, affecting the 2023-2024 hydrological year. These changes were aggravated by a heat wave from June to December 2023. Drought-heat compound events and their consequences are the most critical natural threats to society. River levels reached record lows, or dried up completely, affecting Amazonian ecosystems. Increased risk of wildfires is another concern exacerbated by these conditions.

关键词： El Niño SST in the Tropical Atlantic Amazon Drought River Levels Heatwave Dry Season Length

Enhanced Compliant Adhesive Design and Fabrication with Dual-Level Hierarchical Structure

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2010年第3期7卷 228-234页

作者： Dan Sameoto carlo Menon Department of Mechanical Engineering University of Alberta MENRVA Lab School of Engineering ScienceSimon Fraser University

Synthetic dry adhesives inspired by the nano-and micro-scale hairs found on the feet of geckos and some spiders have beendeveloped for almost a decade. Elastomeric single level micro-scale mushroom shaped fibres are currently able to function evenbetter than natural dry adhesives on smooth surfaces under normal loading. However, the adhesion of these single level syntheticdry adhesives on rough surfaces is still not optimal because of the reduced contact surface area. In nature, contact area ismaximized by hierarchically structuring different scales of fibres capable of conforming surface roughness. In this paper, weadapt the nature’s solution arid propose a novel dual-level hierarchical adhesive design using Polydimethylsiloxane (PDMS),which is tested under peel loading at different orientations. A negative macro-scale mold is manufactured by using a laser cutterto define holes in a Poly(methyl methacrylate) (PMMA) plate. After casting PDMS macro-scale fibres by using the obtainedPMMA mold, a previously prepared micro-fibre adhesive is bonded to the macro-scale fibre substrate. Once the bondingpolymer is cured, the micro-fibre adhesive is cut to form macro scale mushroom caps. Each macro-fibre of the resulting hierarchicaladhesive is able to conform to loads applied in different directions. The dual-level structure enhances the peel strengthon smooth surfaces compared to a single-level dry adhesive, but also weakens the shear strength of the adhesive for a given areain contact. The adhesive appears to be very performance sensitive to the specific size of the fibre tips, and experiments indicatethat designing hierarchical structures is not as simple as placing multiple scales of fibres on top of one another, but can requiresignificant design optimization to enhance the contact mechanics and adhesion strength.

关键词： biomimetics dry adhesive hierarchical dual-level adhesive silicone polymer

Multi-Scale Compliant Foot Designs and Fabrication for Use with a Spider-Inspired Climbing Robot

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2008年第3期5卷 189-196页

作者： Dan Sameoto carlo Menon MENRVA Group School of Engineering Science Simon Fraser University Burnaby BC V5A 1S6 Canada

Climbing robots are of potential use for surveillance, inspection and exploration in different environments. In particular, the use of climbing robots for space exploration can allow scientists to explore environments too challenging for traditional wheeled designs. To adhere to surfaces, biomimetic dry adhesives based on gecko feet have been proposed. These biomimetic dry adhesives work by using multi-scale compliant mechanisms to make intimate contact with different surfaces and adhere by using Van der Waals forces. Fabrication of these adhesives has frequently been challenging however, due to the difficulty in combining macro, micro and nanoscale compliance. We present an all polymer foot design for use with a hexapod climbing robot and a fabrication method to improve reliability and yield. A high strength, low-modulus silicone, TC-5005, is used to form the foot base and microscale fibres in one piece by using a two part mold. A macroscale foot design is produced using a 3D printer to produce a base mold, while lithographic definition of microscale fibres in a thick photoresist forms the ＇hairs＇ of the polymer foot. The adhesion of the silicone fibres by themselves or attached to the macro foot is examined to determine best strategies for placement and removal of feet to maximize adhesion. Results demonstrate the successful integration of micro and macro compliant feet for use in climbing on a variety of surfaces.

关键词： biomimetics dry adhesive gecko climbing robot MEMS silicone

Probabilistic seismic response and reliability assessment of isolated bridges

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2005年第1期4卷 95-106页

作者： Giuseppe carlo Marano Department of Environmental Engineering and Sustainable Development Technical University of BariTarantoItalyAssistantProfessor

Bridge seismic isolation strategy is based on the reduction of shear forcestransmitted from the superstructure to the piers by two means: shifting natural period andearthquake input energy reduction by dissipation concentrated in protection devices. In this paper,a stochastic analysis of a simple isolated bridge model for different bridge and device parametersis conducted to assess the efficiency of this seismic protection strategy. To achieve this aim, asimple nonlinear softening constitutive law is adopted to model a wide range of isolation devices,characterized by only three essential mechanical parameters. As a consequence of the random natureof seismic motion, a probabilistic analysis is carried out and the time modulated Kanai-Tajimistochastic process is adopted to represent the seismic action. The response covariance in the statespace is obtained by solving the Lyapunov equation for a stochastic linearized system. After asensitivity analysis, the failure probability referred to extreme displacement and the mean value ofdissipated energy are assessed by using the introduced stochastic indices of seismic bridgeprotection efficiency. A parametric analysis for protective devices with different mechanicalparameters is developed for a proper selection of parameters of isolation devices under differentsituations.

关键词： bridge seismic isolation stochastic analysis nonlinear softeningconstitutive law reliability assessment