检索结果-南通市图书馆

Diamond Interchange Performance Measures Using Connected Vehicle Data

Journal of Transportation Technologies 2022年第3期12卷 475-497页

作者： Enrique Saldivar-Carranza steven rogers Howell Li Darcy Michael Bullock Purdue University West Lafayette USA

Diamond interchanges are frequently used where a freeway intersects a two-way surface street. Most of the techniques to evaluate the performance of diamond interchanges rely on the Highway Capacity Manual (HCM), simulation, Automated Traffic Signal Performance Measures (ATSPMs), and historical crash data. HCM and simulation techniques require on-site data collection to obtain models’ inputs. ATSPMs need high-resolution controller event data acquired from roadway sensing equipment. Safety studies typically need 3 to 5 years of crash data to provide statistically significant results. This study utilizes commercially available connected vehicle (CV) data to assess the performance and operation of a three- and four-phase diamond interchange located in Indianapolis, Indiana, and Dallas, Texas, respectively. Over 92,000 trajectories and 1,400,000 GPS points are analyzed from August 2020 weekdays CV data. Trajectories are linear-referenced to generate Purdue Probe Diagrams (PPDs) from which arrivals on green (AOG), split failures, downstream blockage, and movement-based control delay are estimated. In addition, an extension of the PPD is presented that characterizes the complete journey of a vehicle travelling through both signals of the diamond interchange. This enhanced PPD is a significant contribution as it provides an analytical framework and graphical summary of the operational characteristics of how the external movements traverse the entire system. The four-phase control showed high internal progression (99% AOG) compared to the moderate internal progression of the three-phase operation (64% AOG). This is consistent with the design objectives of three- and four-phase control models, but historically these quantitative AOG measures were not possible to obtain with just detector data. Additionally, a graphical summary that illustrates the spatial distribution of hard-braking and hard-acceleration events is also provided. The presented techniques can be used by any ag

关键词： Performance Measures Safety Connected Vehicle Trajectories Diamond Interchange

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

New instability and mixing simulations using SPH and a novel mixing measure

引用

Journal of Hydrodynamics 2020年第4期32卷 684-698页

作者： Georgina Reece Benedict D.rogers steven Lind Georgios Fourtakas Department of Mechanical Aerospace and Civil EngineeringUniversityof ManchesterManchesterUK

This paper assesses the ability of smoothed particle hydrodynamics (SPH) to simulate mixing of two-phase flows and theirtransition to instabilities under different flow regimes. A new measure for quantification of the degree of mixing between phases in aLagrangian framework is also developed. The method is validated using the lid-driven cavity and two-phase Poiseuille flow cases. Thevelocity along the centre of the cavity is compared with results from the literature, whilst commercial volume-of-fluid codeSTAR-CCM+ provides a benchmark for the mixing and different mixing measures are considered. The velocity of two-phase Poiseuilleflow along the channel is compared to the analytical solution, and the appearance of interfacial instabilities with perturbation *** is the first time SPH has been used to investigate the onset and development of these instabilities. In particular, it is able to modelthe deforming shape of the interface, which is not given by analytical studies, while also offering improved predictions overconventional mesh-based computational fluid dynamics simulations.

关键词： Smoothed particle hydrodynamics(SPH) multi-phase mixing instability

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Zinc-assisted synthesis of imidazolium-tetrazolate bi-heterocyclic zwitterions with variable alkyl bridge length

引用

Science China Chemistry 2012年第8期55卷 1620-1626页

作者： DRAB David M. SHAMSHINA Julia L. SMIGLAK Marcin COJOCARU O. Andreea KELLEY steven P. rogers Robin D. Center for Green Manufacturing and Department of Chemistry The University of Alabama Tuscaloosa AL 35487 USA

Zinc halide-complexed alkyl-bridged bi-heterocycles were obtained as zwitterions from the Click reaction of a series of N-cyanoalkyl-N-alkylimidazolium halide ionic liquids with sodium azide. Reaction optimization sho... 详细信息

关键词： N-烷基咪唑两性离子辅助合成杂环化锌桥长四唑反应时间

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Reactivity of N-cyanoalkyl-substituted imidazolium halide salts by simple elution through an azide anion exchange resin

引用

Science China Chemistry 2012年第8期55卷 1683-1687页

作者： DRAB David M. KELLEY steven P. SHAMSHINA Julia L. SMIGLAK Marcin COJOCARU O. Andreea GURAU Gabriela rogers Robin D. Center for Green Manufacturing and Department of Chemistry The University of Alabama Tuscaloosa AL 35487 USA

Certain N-cyanoalkyl-functionalized imidazolium halide salts unexpectedly undergo nitrile hydrolysis to amides, as well as dipolar cycloaddition to tetrazoles when eluted on azide anion exchanged resin.

关键词：阴离子交换树脂叠氮化物卤化物烷基取代洗脱咪唑氰基反应性

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Bright spots for inland fish and fisheries to guide future hydropower development

引用

Water Biology and Security 2022年第1期1卷 81-99页

作者： William M.Twardek Ian G.Cowx Nicolas W.R.Lapointe Craig Paukert T.Douglas Beard Elena M.Bennett David Browne Andrew K.Carlson Keith D.Clarke Zeb Hogan Kai Lorenzen Abigail J.Lynch Peter B.McIntyre Paulo Pompeu Mark rogers Alexis Sakas William W.Taylor Taylor D.Ward Zeenatul Basher steven J.Cooke Fish Ecology and Conservation Physiology Laboratory Department of Biology and Institute for Environmental StudiesCarleton University1125 Colonel By DrOttawaON K1S 5B6Canada Fisheries Institute at the University of Hull Cottingham RdHullHU67RXUnited Kingdom Canadian Wildlife Federation 350 Michael Cowpland DrKanataONK2M 2W1Canada U.S.Geological Survey Missouri Cooperative Fish and Wildlife Research UnitUniversity of MissouriColumbiaMO65211United States U.S.Geological Survey National Climate Adaptation Science Center12201 Sunrise Valley DriveMS-516RestonVA20192United States McGill School of Environment McGill University845 Sherbrooke St WMontrealQuebec H3A 0G4Canada Princeton Environmental Institute and Department of Ecology and Evolutionary Biology Princeton UniversityM30 Guyot HallPrincetonNJ08544United States Ecological Sciences Section Science Branch Fisheries and Oceans CanadaCanadaPO Box/CP 5667St.John'sNewfoundland and LabradorA1C 5X1Canada University of Nevada Reno.4505 S Maryland PkwyLas VegasNV89154United States Fisheries and Aquatic Sciences School of Forest Resources and ConservationUniversity of Florida7922 NW 71st StreetGainesvilleFL32653United States Department of Natural Resources Cornell UniversityIthacaNY14853United States Departamento de Biologia Universidade Federal de LavrasAquenta SolLavrasState of Minas Gerais37200-900Brazil U.S.Geological Survey Tennessee Cooperative Fishery Research UnitTennessee tech UniversityCookevilleTN38505United States The Nature Conservancy 6375 Riverside DriveSuite 100DublinOH43017United States Michigan State University Department of Fisheries and WildlifeEast LansingMI48823United States

Hydropower production is one of the greatest threats to fluvial ecosystems and freshwater *** that we have entered the Anthropocene,there is an opportunity to reflect on what might constitute a‘sustainable’Anthropocene in the context of hydropower and riverine fish *** elements of existing practices that promote favorable social-ecological outcomes(i.e.,‘bright spots’)is timely given that there are plans to expand hydropower capacity in previously undammed rivers,intensify dam development in some of the world's largest river systems,and re-license existing *** approach this from a pragmatic perspective:for the foreseeable future,hydropower will likely remain an important source of renewable *** offer support for moving toward a more‘sustainable’Anthropocene,we provide syntheses of best practices during the siting,design,construction,operation,and compensation phases of hydropower development to minimize impacts on inland *** each phase,we offer positive examples(or what might be considered‘bright spots’)pertaining to some of the approaches described within our syntheses,acknowledging that these projects may not be viewed as without ecological and(or)societal detriment by all *** findings underscore the importance of protecting critical habitat and free-flowing river reaches through careful site selection and basinscale planning,infrastructure designs that minimize reservoir effects and facilitate safe passage of fish,construction of hydropower plants using best practices that minimize long-term damage,operating guidelines that mimic natural flow conditions,and compensation that is lasting,effective,inclusive,and locally *** from these‘bright spots’may require engagement of diverse stakeholders,professionals,and governments at scales that extend well beyond a given site,river,or even ***,environmental planning that integrates hydropower development into broader discussions

关键词： Migration Dams Salmon Hydroelectric Flow Socioecological Fish passage Barriers Ecosystems

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

GPU Acceleration of the Locally Selfconsistent Multiple Scattering Code for First Principles Calculation of the Ground State and Statistical Physics of Materials

引用

国际计算机前沿大会会议论文集 2015年第B12期 64-66页

作者： Markus Eisenbach Jeff Larkin Justin Lutjens steven Rennich James H.rogers Oak Ridge National Laboratory Oak RidgeTN 37831USA NVIDIA Corporation Santa ClaraCA 95050USA

The Locally Self-consistent Multiple Scattering(LSMS)code solves the first principles Density Functional theory Kohn-Sham equation for a wide range of materials with a special focus on metals,alloys and metallic *** has traditionally exhibited near perfect scalability on massively parallel high performance computer *** present our efforts to exploit GPUs to accelerate the LSMS code to enable first principles calculations of O(100,000)atoms and statistical physics sampling of finite temperature *** the Cray XK7 system Titan at the Oak Ridge Leadership Computing Facility we achieve a sustained performance of 14.5PFlop/s and a speedup of 8.6 compared to the CPU only code.

关键词： The Locally Self-consistent Multiple Scattering(LSMS)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Use of natural trophic resources by Eastern oysters and Pacific oysters of different ploidy

引用

Aquaculture and Fisheries 2021年第1期6卷 75-83页

作者： Darien D.Mizuta Gary H.Wikfors Shannon L.Meseck Yaqin Li Mark S.Dixon Hyun Jeong Lim In Joon Hwang MagalíBazzano steven Pitchford Northeast Fisheries Science Center(NEFSC) NOAA212 Rogers AveMilfordCT06460USA East Sea Fisheries Research Institute National Institute of Fisheries ScienceGangneung25435South Korea West Sea Fisheries Institute National Institute of Fisheries ScienceIncheon22383South Korea

Ploidy manipulation,such as triploidy,in farmed oysters has been used as a tool to enhance oyster quality throughout all seasons because triploid oysters allocate less energy to gametogenesis,and therefore are deemed better performers than fertile ***,scientific reports describing no differences between ploidies and,in certain conditions,disadvantages of triploids are not *** the use of triploid oyster seed increases culture cost for growers,consistency in performance of triploids is considered to be an important ***,research to assess how ploidy affects physiological processes underlying oyster performance is fundamental for the aquaculture *** work was undertaken to assess if ploidy-based differences in performance in the two most commonly cultivated commercial species of oyster in the United States,Crassostrea virginica and Crassostrea gigas,are associated with filtration,feeding,and *** test this hypothesis,biodeposition measurements were made with oysters exposed to ambient water conditions at locations and seasons providing a variety of environmental *** did not show differences in filtration and feeding associated with ploidy,but physiological feeding variables fluctuated with environmental characteristics associated with spatial and seasonal differences.A preliminarily test of the hypothesis that differences in energy metabolism may account for differences in performance among ploidy levels indicates that basal metabolic rates of diploid,triploid,and tetraploid Eastern oysters are not different.

关键词： Ploidy Farmed oysters Feeding Biodeposition Seston Metabolism

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

光明与希望伦敦玛吉癌症疗养中心

引用

室内设计与装修 2018年第4期 76-79页

作者： [美]steven Holl 于婕金陵科技学院不详

玛吉癌症疗养中心是一个专为癌症病人提供关怀的人性化空间。它的筹划者是英国花园设计师与作家Maggie Keswick Jencks，她的构想在一众著名建筑设计师的支持下得以实现。包括普利兹克奖获得者Frank Gehry、Norman Foster、Richard Rog... 详细信息

玛吉癌症疗养中心是一个专为癌症病人提供关怀的人性化空间。它的筹划者是英国花园设计师与作家Maggie Keswick Jencks，她的构想在一众著名建筑设计师的支持下得以实现。包括普利兹克奖获得者Frank Gehry、Norman Foster、Richard rogers、Zaha Hadid和Rem Koolhaas等在内的建筑师，均为玛吉癌症疗养中心提供过免费设计。这些在她因乳腺癌去世后建起来的美好空间，可以让癌症患者在其中消化最糟糕的消息，并做好重新面对世界的准备。

关键词：癌症病人疗养建筑设计师人性化空间伦敦 Foster 癌症患者获得者

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：