检索结果-南通市图书馆

Provision,transport and deposition of debris in urban waterways

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International journal of Sediment Research 2015年第2期30卷 142-149页

作者： Deonie Allen Scott Arthur nicolas Wallerstien janice Blanc Heather Haynes Heriot-Watt University

The transport of woody debris from urban surfaces,through local urban waterways,to constriction and blockage risk locations is not well *** trials have identified debris and watercourse dimensions as influential factors on debris movement,and large woody debris movement has been traced in the natural rural environment using time series photography,active transponders,and field *** novel passive transponder technology,small woody debris has been traced through an urban case study watercourse to establish key influential factors on urban debris *** incorporating urban debris transport detail into the source and deposition process,a complete picture of urban debris transport can be created,supporting effective culvert and trash screen design,watercourse maintenance and blockage risk *** case study highlights that factors beyond watercourse depth and velocity are influential in debris movement within an urban *** dimension and source location upstream are shown to significantly affect the potential for debris to reach a downstream constriction,illustrating a possible distance limitation in nuisance flow debris blockage risk.

关键词： Urban debris transport Flood risk Blockage Urban gross pollutants Passive integrated transponder technology

Targeting new ways for large-scale,high-speed surface functionalization using direct laser interference patterning in a roll-to-roll process

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

International journal of Extreme Manufacturing 2023年第3期5卷 569-583页

作者： Christoph Zwahr nicolas Serey Lukas Nitschke Christian Bischoff Ulrich Radel Alexandra Meyer Penghui Zhu Wilhelm Pfleging Laser Precision Manufacturing Fraunhofer Institute for Material and Beam Technology(IWS)DresdenGermany Topag Lasertechnik GmbH DarmstadtGermany Institute of Manufacturing Science and Engineering Technical University DresdenDresdenGermany Institute for Applied Materials—Applied Materials Physics(IAM-AWP) Karlsruhe Institute of Technology(KIT)Eggenstein-LeopoldshafenGermany

Direct Laser Interference Patterning(DLIP)is used to texture current collector foils in a roll-to-roll process using a high-power picosecond pulsed laser system operating at either fundamental wavelength of 1064 nm or 2nd harmonic of 532 *** raw beam having a diameter of 3 mm@1/e^(2) is shaped into an elongated top-hat intensity profile using a diffractive so-called FBS■-L element and cylindrical *** shaped beam is split into its diffraction orders,where the two first orders are parallelized and guided into a galvanometer *** deflected beams inside the scan head are recombined with an F-theta objective on the working position generating the interference *** DLIP spot has a line-like interference pattern with about 15μm spatial *** fluences of up to 8 j cm^(-2) were achieved using a maximum pulse energy of 0.6 ***,an in-house built roll-to-roll machine was *** this setup,aluminum and copper foil of 20μm and 9μm thickness,respectively,could be *** to current collector structuring coating of composite electrode material took *** case of lithium nickel manganese cobalt oxide(NMC 622)cathode deposited onto textured aluminum current collector,an increased specific discharge capacity could be achieved at a C-rate of 1℃.For the silicon/graphite anode material deposited onto textured copper current collector,an improved rate capability at all C-rates between C/10 and 5℃ was *** rate capability was increased up to 100%compared to reference *** C-rates between C/2 and 2℃,the specific discharge capacity was increased to 200 mAh g^(-1),while the reference electrodes with untextured current collector foils provided a specific discharge capacity of 100 m Ah g^(-1),showing the potential of the DLIP technology for cost-effective production of battery cells with increased cycle lifetime.

关键词： DLIP lithium-ion battery surface texturing copper aluminum

Recent advances in seasonal and multi-annual tropical cyclone forecasting

在线全文

学校读者我要写书评

暂无评论

Tropical Cyclone Research and Review 2023年第3期12卷 182-199页

作者： Yuhei Takaya Louis-Philippe Caron Eric Blake Francois Bonnardot nicolas Bruneau joanne Camp johnny Chan Paul Gregory jhordanne j.jones Namyoung Kang Philip j.Klotzbach Yuriy Kuleshov Marie-Dominique Leroux julia F.Lockwood Hiroyuki Murakami Akio Nishimura Dushmanta R.Pattanaik Tom j.Philp Yohan Ruprich-Robert Ralf Toumi Frederic Vitart Seonghee Won Ruifen Zhan Meteorological Research Institute Japan Meteorological AgencyIbarakiJapan Ouranos MontrealCanada National Hurricane Center National Oceanic and Atmospheric AdministrationMiamiUSA Meteo-France Direction Interregionale pour l'Ocean IndienSaint-Denisde La ReunionFrance Reask LondonUK Bureau of Meteorology VictoriaAustralia City University of Hong Kong Hong KongChina Asia-Pacific Typhoon Collaborative Research Center ShanghaiChina Shanghai Typhoon Institute China Meteorological AdministrationShanghaiChina Department of Earth Atmosphericand Planetary SciencesPurdue UniversityWest LafayetteUSA University Corporation for Atmospheric Research BoulderUSA Department of Geography Kyungpook National UniversityDaeguRepublic of Korea Department of Atmospheric Science Colorado State UniversityFort CollinsUSA Royal Melbourne Institute of Technology(RMIT)University MelbourneAustralia Met Office Hadley Centre ExeterUK National Oceanographic and Atmospheric Administration/Geophysical Fluid Dynamics Laboratory PrincetonUSA japan Meteorological Agency TokyoJapan India Meteorological Department New DelhiIndia Maximum Information LondonUK Barcelona Supercomputing Center BarcelonaSpain Department of Physics Imperial College LondonLondonUK European Centre for Medium-Range Weather Forecasts(ECMWF) ReadingUK Korea Meteorological Administration JejuRepublic of Korea Department of Atmospheric and Oceanic Sciences&Institute of Atmospheric Sciences Fudan UniversityShanghaiChina

Seasonal tropical cyclone(TC)forecasting has evolved substantially since its commencement in the early ***,present operational seasonal TC forecasting services still do not meet the requirements of society and stakeholders:current operational products are mainly basin-scale information,while more detailed sub-basin scale information such as potential risks of TC landfall is anticipated for decision *** fill this gap and make the TC science and services move forward,this paper reviews recent research and development in seasonal tropical cyclone(TC)*** particular,this paper features new research topics on seasonal TC predictability in neutral conditions of El Ni˜no–Southern Oscillation(ENSO),emerging forecasting techniques of seasonal TC activity including Machine Learning/Artificial Intelligence,and multi-annual TC *** also review the skill of forecast systems at predicting landfalling statistics for certain regions of the North Atlantic,Western North Pacific and South Indian oceans and discuss the gap that remains between current products and potential user's *** knowledge and advanced forecasting techniques are expected to further enhance the capability of seasonal TC forecasting and lead to more actionable and fit-for-purpose products.

关键词： Tropical cyclones Seasonal forecasting Climate services

Tandem running by foraging Pachycondyla striata workers in field conditions vary in response to food type,food distance,and environmental conditions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2021年第5期67卷 541-549页

作者： janiele Pereira SILVA Lohan VALADARES Maria Eduarda Lima VIEIRA Serafino TESEO nicolas CHALINE LEEEIS Departamento de Psicologia ExperimentalInstituto de Psicologia ExperimentalUniversidade de Sao PauloSao PauloSPCEP 05508-030Brazil Programa de pos-graduacao em Psicologia Experimental USPSao PauloSPCEP 05508-030Brazil Evolution GenomesBehavior and EcologyCNRS1 Avenue de la TerrasseGifsur-Yvette 91987France LBC Departamento de Fisiologia e ComportamentoCentro de BiocienciasUniversidade Federal do Rio Grande do NorteNatalRNCEP 59078-970Brazil School of Biological Sciences Nanyang Technological University60 Nanyang DriveSingapore 637551Singapore

Ants show collective and individual behavioral flexibility in their response to immediate context,choosing for example between different foraging *** Pachycondyla striata,workers can forage solitarily or recruit and guide nestmates to larger food sources through tandem *** considered more ancestral and less efficient than pheromone trail-laying,this strategy is common especially in species with small colony *** is not known is how the decision to recruit or follow varies according to the immediate *** is,how fine adjustments in information transfer affect immediate foraging decisions at the colony ***,we studied individually marked workers and evaluated their foraging decisions when food items varied in nature(protein versus carbohydrate),size,and distance from the nest at different temperatures and humidity *** results show that tandem run leaders and potential followers adjust their behavior according to a combination of external *** 84.2%of trips were solitary,most ants(81%)performed at least 1 tandem ***,tandem runs were more frequent for nearby resources and at higher relative ***,when food items were located far away,tandem runs were more successful when heading to protein sources(75%)compared with carbohydrate sources(42%).Our results suggest that the social information transfer between leaders and followers conveys more information than previously thought,and also relies on their experience and motivation.

关键词： collective behavior decision-making emotional states flexibility Ponerinae social learning

Replicating and projecting the path of COVID-19 with a model-implied reproduction number

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Infectious Disease Modelling 2020年第1期5卷 635-651页

作者： Shelby R.Buckman Reuven Glick Kevin j.Lansing nicolas Petrosky-Nadeau Lily M.Seitelman Federal Reserve Bank of San Francisco 101 Market StreetSan Francisco CA94105USA

We demonstrate a methodology for replicating and projecting the path of COVID-19 using a simple epidemiology *** fit the model to daily data on the number of infected cases in China,Italy,the United States,and *** four countries can be viewed as representing different stages,from later to earlier,of a COVID-19 epidemic *** solve for a model-implied effective reproduction number R t each day so that the model closely replicates the daily number of currently infected cases in each *** out-of-sample projections,we fit a behavioral function to the in-sample data that allows for the endogenous response of R t to movements in the lagged number of infected *** show that declines in measures of population mobility tend to precede declines in the model-implied reproduction numbers for each *** pattern suggests that mandatory and voluntary stay-at-home behavior and social distancing during the early stages of the epidemic worked to reduce the effective reproduction number and mitigate the spread of COVID-19.

关键词： Coronavirus COVID-19 SEIR Model Epidemics Reproduction number

Investigation of KTiOPO4 nanocrystals by means of second-harmonic light emission

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics Letters 2008年第1期6卷 64-67页

作者： Chunyuan Zhou Loc Le Xuan Abdallah Slablab nicolas Sandeau Sophie Brasselet Dominique Chauvat jean-Francois Roch Laboratoire de Photonique Quantique et Moléculaire ENS Cachan UMR CNRS 8537 61 avenue du President Wilson 94235 Cachan Cedex France

The finding of nonlinear nanometric-sized probes is of key importance for the development of nonlinear microscopy in physical as well as biological sciences. We isolate nonlinear KTiOPO4 nanocrystals and study them by second-harmonic generation microscopy （SHGM） and atomic force microscopy （AFM） independently. With both polarization analysis and defocused imaging of the emitted second harmonic field, we extract the Euler angles of the crystalline axes of a single nanocrystal. A balanced coherent optical homodyne detection shows the coherent nature of the nanocrystal nonlinear emission and allows a phase measurement of the emitted second-harmonic field. These features make the KTiOPO4 nanocrystal a good candidate for a vectorial probe of electromagnetic near fields.

关键词： KTiOPO4 谐波光发射物理学

Anomalous moire pattern of graphene investigated by scanning tunneling microscopy： Evidence of graphene growth on oxidized Cu（111）

在线全文

学校读者我要写书评

暂无评论

Nano Research 2014年第1期7卷 154-162页

作者： nicolas Reckinger Eloise Van Hooijdonk Frederic joucken Anastasia V. Tyurnina Stephane Lucas jean-Francois Colome~ Research Center in Physics of Matter and Radiation (PMR) University of Namur Rue de Bruxelles 6 1 B-5000 Namur Belgium

The growth of graphene on oriented (111) copper films has been achieved by atmospheric pressure chemical vapor deposition. The structural properties of as-produced graphene have been investigated by scanning tunneling microscopy. Anomalous moiré superstructures composed of well-defined linear periodic modulations have been observed. We report here on comprehensive and detailed studies of these particular moiré patterns present in the graphene topography revealing that, in certain conditions, the growth can occur on the oxygen-induced reconstructed copper surface and not directly on the oriented (111) copper film as expected.

关键词：扫描隧道显微镜氧化铜石墨生长常压化学气相沉积证据图案波纹

Mode-and wavelength-multiplexed transmission with crosstalk mitigation using a single amplified spontaneous emission source

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2019年第11期7卷 1363-1369页

作者： Yetian Huang Haoshuo Chen Hanzi Huang Zhengxuan Li nicolas K.Fontaine Roland Ryf juan Carlos Alvarado Rodrigo Amezcua-Correa john van Weerdenburg Chigo Okonkwo A.M.j.Koonen Yingxiong Song Min Wang Key Laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced CommunicationShanghai Institute for Advanced Communication and Data ScienceShanghai UniversityShanghai 200444China Nokia Bell Labs HolmdelNew Jersey 07733USA CREOL University of Central FloridaOrlandoFlorida 32816USA Institute for Photonic Integration Eindhoven University of Technology5600 MBEindhovenThe Netherlands

We propose to use the low-coherence property of amplified spontaneous emission(ASE) noise to mitigate optical crosstalk, such as spatial, polarization, and modal crosstalk, which currently limits the density of photonic integration and fibers for dense space-division multiplexing. High optical crosstalk tolerance can be achieved by ASE-based low-coherence matched detection, which avoids dedicated optical lasers and uses spectrally filtered ASE noise as the signal carrier and as a matched local oscillator. We experimentally demonstrate spatial and modal crosstalk reduction in multimode fiber(MMF) and realize mode-and wavelength-multiplexed transmission over1.5-km MMF supporting three spatial modes using a single ASE source. Performance degradation due to model dispersion over MMF is experimentally investigated.

关键词： crosstalk polarization matched

The descriptive epidemiology of sitting in Chilean adults: Results from the National Health Survey 2009-2010

在线全文

学校读者我要写书评

暂无评论

journal of Sport and Health Science 2019年第1期8卷 32-38页

作者： nicolas Aguilar-Farias Pia Martino-Fuentealba ANDrea Cortinez-O'Ryan Damian Chandia-Poblete Carlos A.Celis-Morales Paz Bahamondes jaime Leppe Zamora Wendy j.Brown Department of Physical Education Sports and Recreation Universidad de La Frontera BHF Glasgow Cardiovascular Research Centre Institute of Cardiovascular and Medical Science University of Glasgow School of Physiotherapy Universidad del Desarrollo School of Human Movement and Nutrition Sciences The University of Queensland

Background: Although evidence on the health effects of sedentary behavior(SB) has grown systematically in recent years, few developing countries have reported population levels of SB, especially in South America. Our objective was to describe time spent sitting in a representative sample from Chile categorized by age, gender, educational level, and body mass index(BMI).Methods: A national health survey was conducted in Chile in a nationally representative sample(n = 5411) in 2009-2010. Sitting time(ST) was measured with the Global Physical Activity Questionnaire Version ***: Data were from 5031 participants(43.26±0.41 years, mean±SE; 40.3% male). Overall, there were no gender differences in mean ST(men: 158.10±5.80 min/day, women 143.45±4.77 min/day; p = 0.05). ST was lower in those who lived in rural areas compared with urban areas(99.4 min/day vs. 160.0 min/day; p = 0.001). ST increased significantly with increasing BMI, but only in men(p = 0.009), and was positively related to years of education in both men and women(p < 0.0001).Conclusion: The findings were different from those reported in other countries and contexts, reinforcing the need for international surveillance and monitoring over time to inform policy makers. Differences in ST across different groups emphasize the need to develop tailored messages and interventions for reducing ST in different population subgroups.

关键词： Ageing Health behavior Health inequalities Lying Preventive medicine Reclining Screen time Surveillance