检索结果-南通市图书馆

Year-round multi-scale habitat selection by Crested Tit(Lophophanes cristatus)in lowland mixed forests(northern Italy)

引用

Avian Research 2022年第4期13卷 461-467页

作者： Alessandro Berlusconi Alessio Martinoli Lucas AWauters Giulia Tesoro Stefania Martini Erminio Clerici Gualtiero Guenzani Gabriele Pozzi Diego Rubolini Michelangelo Morganti Adriano Martinoli Environment Analysis and Management Unit-Guido Tosi Research Group-Department of Theoretical and Applied Sciences Universita degli Studi dell’InsubriaVia J.H.Dunant 321100VareseItaly CNR-IRSA National Research Council–Water Research Institute Via del Mulino 1920861BrugherioMBItaly Gruppo Insubrico di Ornitologia c/o Civico Museo Insubrico di Storia Naturale di Clivio e Induno OlonaVia Manzoni21050ClivioVAItaly Parco Pineta di Appiano Gentile e Tradate Via Alessandro Manzoni1122070Castelnuovo BozzenteCOItaly e Dipartimento di Scienze della Vita Biologia dei Sistemi Universita degli Studi di TorinoVia Accademia Albertina 1310123TurinItaly Conservation Department LIPU-Birdlife Italia Via Udine 3/a43122ParmaItaly Department of Environmental Science and Policy Universita degli Studi di MilanoVia Celoria 2620122MilanItaly

Determining how animals respond to resource availability across spatial and temporal extents is crucial to understand ecological processes underpinning habitat ***,we used a multi-scale approach to study the year-round habitat selection of the Crested Tit(Lophophanes cristatus)in a semi-natural lowland woodland of northern Italy,analysing different habitat features at each *** performed Crested Tit censuses at three different spatial *** the macrohabitat scale,we used geolocalized observations of individuals to compute Manly's habitat selection index,based on a detailed land-use map of the study *** the microhabitat scale,the trees features were compared between presence and absence *** the foraging habitat scale,individual foraging birds and their specific position on trees were recorded using focal animal *** were performed during both the breeding(March to May)and wintering(December to January)*** the macrohabitat scale,the Crested Tits significantly selected pure and mixed pine forests and avoided woods of alien plant species,farmlands and urban *** the microhabitat scale,old pine woods with dense cover were selected,with no significant difference in the features of tree selection between the two phenological *** the foraging habitat scale,the species was observed spending more time foraging in the canopies than in the understorey,using mostly the portion of Scots Pine(Pinus sylvestris)canopies closer to the trunk in winter,while during the breeding period,the whole canopy was ***,breeding and wintering habitats largely overlapped in the Crested *** on our findings,lowland Crested Tits can be well defined as true habitat specialists:they are strictly related to some specific coniferous woodland ***,compared to other tit species,which normally show generalist habits during winter,the Crested Tit behaves as a habitat specialist also out of the breeding ***

关键词： Crested tit Functional response Habitat selection multi-scale approach Scots pine

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

Asymptotic Expansions for Solutions of Parabolic Systems Associated with multi-scale Switching Diffusions

引用

Acta Mathematicae Applicatae Sinica 2017年第3期33卷 731-752页

作者： Ky TRAN G.YIN Department of Mathematics College of Education Hue University Department of Mathematics Wayne State University

This work develops asymptotic expansions of systems of partial differential equations associated with multi-scale switching diffusions. The switching process is modeled by using an inhomogeneous continuous- time Markov chain. In the model, there are two small parameters ε and δ. The first one highlights the fast switching, whereas the other delineates the slow diffusion. Assuming that ε and δ are related in that ε = δγ, our results reveal that different values of γ lead to different behaviors of the underlying systems, resulting in different asymptotic expansions. Although our motivation comes from stochastic problems, the approach is mainly analytic and is constructive. The asymptotic series are rigorously justified with error bounds provided. An example is provided to demonstrate the results.

关键词： asymptotic expansion multi-scale approach switching diffusion

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

Three-dimensional modelling of shear keys in concrete gravity dams using an advanced grillage method

引用

Water Science and Engineering 2020年第3期13卷 223-232页

作者： Mahdi Ben Ftima Steephane Lafrance Pierre Leeger Polytechnique Montreal Montreal University CampusMontrealH3C 3A7Canada

Contraction joint shear keys are resilient features of gravity dams that can be considered to increase the sliding safety factors or minimise seismic residual sliding displacements,allowing costly remedial actions to be *** paper presents a novel,robust,and computationally efficient three-dimensional(3D)modelling and simulation strategy of gravity dams,using a series of adjacent cantilever beam elements to represent individual *** monoliths are interconnected in the longitudinal direction by 3D no-tension link elements representing the lumped shear key stiffness contributions at a particular *** objective is to assess the shear key internal force demands,including the axial force,shear,and moment *** key demand-capacity ratios can then be assessed with related multi-axial failure *** 3D link element stiffness coefficients were derived from a series of 3D finite element(FE)solid models with a detailed representation of geometrical features of multiple shear *** results from the proposed method based on advanced grillage analysis show strong agreement with reference solutions from 3D FE solid models,demonstrating high accuracy and performance of the proposed *** application of the proposed advanced grillage method to a dam model with two monoliths clearly shows the advantage of the proposed method,in comparison to the classical approach used in practise.

关键词： Gravity dam Shear keys Seismic analysis Grillage analysis Finite element model multi-scale approach

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

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

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：