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A NEW TECHNIQUE FOR PREDICTING DISTRIBUTION OF TERRESTRIAL VERTEBRATES USING INFERENTIAL MODELING

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Zoological Research 2000年第3期21卷 231-237页

作者：陈国君 a.townsend Peterson 美国堪萨斯大学自然历史博物馆暨生态与进化生物学系

A new technique for predicting species' geographic distribution is *** approach involves 3 steps:①setting up geographic base data;②collecting and georeferencing distributional points;③modeling ecological niches using the biodiversity species workshop implementation of the genetic algorithm for rule set prediction (GARP).To illustrate these procedures,an example based on the Brown Eared Pheasant (Crossoptilon mantchuricum) is *** technique constitutes a useful tool for assessing geographic distribution for questions of ecology,biogeography,systematics,and conservation biology.

关键词： Geographic information systems Genetic algorithm for rule set prediction Distribution Ecological niche

Informationist roles and collaborations in curriculum innovation at the University of Michigan＇s *** Taubman Health Sciences Library

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中华医学图书情报杂志 2018年第1期27卷 45-49页

作者： Whitney a.townsend Uniesity of Michigan's A. Alfred Taubman Health Sciences Library

To address the ultimate mission to be ＂ a valued partner,fully integrated into the work of the university and providing leadership in knowledge management for education, research, patient care, and community outreach＂,the University of Michigan A. Alfred Taubman Health Sciences Library(THL） has transformed from retitling librarians as informationists to shifting from a service to a collaboration focus. Infomationists at THL have spent several years building relationships and expertise to be true partners in curriculum integration and innovation within the health sciences schools and colleges at the University of Michigan and the curricular integration has becoming a constantly evolving process for THL informationists. Current article focus on how THL convert the librarian into informationist and how to make collaborations in curriculum innovation within different departments to furtherly improve the status of THL library in the University.

关键词： Mission Integrated Informationist Collaboration focus Curriculum innovation

Typhoon frequency and intensity across the Western Pacific Ocean north of the Equator, 1951 – 2014

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中国科学数据（中英文网络版） 2017年第4期2卷 40-49页

作者： a.townsend Peterson Lindsay P.Campbell Rafe M.Brown Biodiversity Institute University of KansasLawrenceKansas 66045USA

Disturbance has been a repeated theme in ecology in recent decades,yet incorporating its frequency and pattern at broad spatial scales into ecological analyses has been difficult-rather,most environmental datasets used in broad-extent analyses represent average *** present a detailed dataset summarizing the frequency(i.e.,number of typhoons)and intensity(average and maximum windspeeds)of typhoons across the Western Pacific north of the Equator,based on data characterizing tracks for 1673 typhoons from the Japan Meteorological *** data presented are aggregated and resampled to 0.2°(~22 km at the Equator)spatial resolution;temporal coverage extends *** also present data specifically for prior to 1980 and after 1999,to respond to questions related to climate change,although no major changes were evident between the time periods.

关键词： typhoon disturbance Western Pacific maps

On the potential of documenting decadal-scale avifaunal change from before-and-after comparisons of museum and observational data across North America

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Avian Research 2022年第1期13卷 1-10页

作者： Fernando Machado-Stredel Benedictus Freeman Daniel Jiménez-Garcia Marlon E.Cobos Claudia Nunez-Penichet Laura Jiménez Ed Komp Utku Perktas Ali Khalighifar Kate Ingenloff Walter Tapondjou Thilina de Silva Sumudu Fernando Luis Osorio-Olvera a.townsend Peterson Biodiversity Institute and Department of Ecology and Evolutionary Biology University of KansasLawrenceKSUSA Centro de Agroecología y Ambiente Instituto de CienciasBenemérita Universidad Autónoma de PueblaPueblaPueblaMexico Information and Telecommunication Technology Center(ITTC) University of KansasLawrenceKSUSA Department of Biology(Zoology Section-Biogeography Research Lab.) Faculty of ScienceHacettepe UniversityBeytepeAnkaraTurkey Department of Ornithology American Museum of Natural HistoryCentral Park West at 79th StreetNew YorkNYUSA Departamento de Ecología de la Biodiversidad Instituto de EcologíaUniversidad Nacional Autónoma de MéxicoCiudad de MéxicoMéxico

Studies of biodiversity dynamics have been cast on either long(systematics)or short(ecology)time scales,leaving a gap in coverage for moderate time scales of decades to ***-scale biodiversity information resources now available offer opportunities to fill this gap for many parts of the world via detailed,quantitative comparisons of assemblage composition,particularly for regions without rich time series *** explore the possibility that such changes in avifaunas across the United States and Canada before and after the first three decades of marked global change(i.e.,prior to 1980 versus after 2010)can be reconstructed and characterized from existing primary biodiversity *** an illustration of the potential of this methodology for sites even in regions not as well sampled as the United States and Canada,we also explored changes at a single site in Mexico(Chichén-Itzá).We analyzed two large-scale datasets:one summarizing bird records in the United States and Canada before 1980,and one for the same region after *** used probabilistic inventory completeness analyses to identify sites that have avifaunas that have likely been inventoried more or less *** prepared detailed comparisons between the two time periods to analyze species showing distributional changes over the time period *** identified 139 sites on a 0.05°grid that were demonstrably well-inventoried before 1980 in the United States and Canada,of which 108 were also well-inventoried after *** presence/absence patterns between the two time periods for 601 bird species,we found significant spatial autocorrelation in overall avifaunal turnover(species gained and lost),but not in numbers of species *** noted potential northward retractions of ranges of several species with high-latitude(boreal)distributions,while other species showed dominant patterns of population loss,either rangewide(e.g.,Tympanuchus cupido)or regionally(e.g.,Thryomanes bewickii).We dev

关键词： Biodiversity dynamics Birds Climate change Inventory completeness Time scale Turnover

A Review of State-of-the-art Flexible Power Point Tracking Algorithms in Photovoltaic Systems for Grid Support:Classification and Application

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 1-21页

作者： Mina Haghighat Mehdi Niroomand Hossein Dehghani Tafti Christopher D.townsend Tyrone Fernando the Department of Electrical Engineering University of IsfahanIsfahanIran the Department of Electrical Electronic and Computer EngineeringUniversity of Western AustraliaCrawley WA 6009Australia

To maximize conversion efficiency,photovoltaic(PV)systems generally operate in the maximum power point tracking(MPPT)***,due to the increasing penetra tion level of PV systems,there is a need for more developed control functions in terms of frequency support services and voltage control to maintain the reliability and stability of the power ***,flexible active power control is a manda tory task for grid-connected PV systems to meet part of the grid ***,a significant number of flexible pow er point tracking(FPPT)algorithms have been introduced in the existing *** purpose of such algorithms is to real ize a cost-effective method to provide grid support functional ities while minimizing the reliance on energy storage *** paper provides a comprehensive overview of grid support functionalities that can be obtained with the FPPT control of PV systems such as frequency support and volt-var *** of these grid support functionalities necessitates PV sys tems to operate under one of the three control strategies,which can be provided with FPPT *** three control strate gies are classified as:①constant power generation control(CP GC),②power reserve control(PRC),and③power ramp rate control(PRRC).A detailed discussion on available FPPT algo rithms for each control strategy is also *** paper can serve as a comprehensive review of the state-of-the-art FPPT algorithms that can equip PV systems with various grid support functionalities.

关键词： Maximum power point tracking(MPPT) flexi ble power point tracking(FPPT) power reserve control(PRC) power ramp rate control(PRRC) low voltage ride-through(LVRT) constant power generation(CPG)

CONTINUOUS AND DISCRETE N-CONVEX APPROXIMATIONS

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Analysis in Theory and Applications 1992年第4期8卷 28-34页

作者： D.Legg D.townsend Indiana University-Purdue University U.S.A

We show that the best L_p-approximant to continuous functions by n-convex functions is the limit of discrete n-convex *** techniques of the proof are then used to show the existence of near interpolants to discrete n-... 详细信息

关键词： CONTINUOUS AND DISCRETE N-CONVEX APPROXIMATIONS

The corner that held them

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The corner that held them

Bridge vibration under complex wind field and corresponding measurements: A review

作者： Sylvia.townsend Warner

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Journal of Traffic and Transportation Engineering(English Edition) 2022年第3期9卷 339-362页

作者： Enbo Yu Guoji Xu Yan Han Peng Hu Jamie F.townsend Yongle Li School of Civil Engineering Southwest Jiaotong UniversityChengdu 610031China School of Civil Engineering Changsha University of Science and TechnologyChangsha 410114China

Due to increased demands in transportation development,bridge construction has been extended to areas with complex wind *** addition to common flow features such as high wind speeds and strong turbulence intensity,in coastal areas,bridges are likely to be exposed to non-stationary and non-Gaussian high-speed wind fields during hurricane *** built in mountainous regions will experience varying wind directions,incident angles of attack(AOA),and wind speed variation due to undulating *** complex wind fields are challenging to the bridge engineering community to which accurate calculation methods and suppression measures for bridge vibration are urgently *** this paper,state-of-the-art research results are introduced through three categories:(a)the distinctive characteristics of complex wind fields in offshore and mountainous areas,(b)the categories of wind-induced vibrations for bridges,and(c)the suppression measures employed in engineering *** now,the studies regarding the coupled bridge vibration in complex wind fields have made considerable progress,but a richer database of actual wind measurement results and more efficient simulation methods still need to be further established.

关键词： Complex wind field Long-span bridge Vibration suppression Buffeting VIV Flutter

Rethinking phylogeographic structure and historical refugia in the rufous-capped babbler Cyanoderma ruficeps in light of range-wide genetic sampling and paleodistributional reconstructions

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Current Zoology 2015年第5期61卷 901-909页

作者： Peter A. HOSNER Huatao LIU A. townsend PETERSON Robert G. MOYLE Biodiversity Institute University of Kansas Lawrence Kansas 66045 USA School of Chemistry and Life Sciences Guizhou Education University Guiyang 550018 China

Combining ecological niche modeling with phylogeography has become a popular approach to understand how historical climate changes have created and maintained population structure. However, methodological choices in geographic extents and environmental layer sets employed in modeling may affect results and interpretations profoundly. Here, we infer range-wide phylogeographic structure and model ecological niches of Cyanoderrna ruficeps, and compare results to previous studies that examined this species across China's Mainland and Taiwan only. Use of dense taxon sampling of closely related species as outgroups question C. ruficeps monophyly. Furthermore, previously unsampled C. ruficeps populations from central Vietnam were closely related to disjunct western populations （Nepal, Tibet, Myanmar, Yunnan）, rather than to geographically proximate populations in northern Vietnam and eastern China. Phylogeographic structure is more complex than previously appreciated; niche model projections to Last Glacial Maximum climate scenarios identified larger areas of suitable conditions than previous studies, but potential distributional limits differed markedly between climate models employed and were dependent upon interpretation of non-analogous historical climate scenarios. Previously identified population expansion across central China may result from colonization from refugial distributions during the Last Interglacial, rather than the Last Glacial Maximum, as previously understood [Current Zoology 61 （5）： 901-909, 2015].

关键词： Biogeography Climate change Ecological niche modeling Southeast Asia Pleistocene Refugia