Results 11 to 20 of about 6,814 (169)
Rare Metals, EarlyView.ABSTRACT Low conductivity, slow ion‐diffusion, and limited reactive sites are common problems in electrocatalysts and electrode materials. In this study, a complex NiTe–CoTe heterojunction with abundant Te vacancies embedded in N, P, and F co‐doped hollow carbon nanorods (NiTe1−x–CoTe1−x/NPFC) was fabricated via a simple ionic liquid‐assisted ...
Mingjie Yi +7 more
wiley +1 more source
Lessons from an eradication under multiple constraints of an island rat population of record density
Conservation Biology, EarlyView.Abstract Invasive rats threaten island biodiversity, disrupting ecosystems and endangering native species. Although rat eradication has succeeded on many islands, tropical islands present unique management challenges. Strict regulations and financial constraints on some tropical islands further limit proven eradication methods, complicating rodent ...
Tatiane Micheletti +7 more
wiley +1 more source
Dizhen xuebao为了充分发挥谱元法和有限差分法各自在数值模拟复杂介质中地震波传播的优点，同时避免各自缺点，本文提出了模拟地震波传播的谱元-有限差分（SEM-FDM）混合方法。该混合方法在起伏地形附近采用谱元法计算地表附近的地震波传播；在远离起伏地形的区域之下，采用有限差分法计算地震波传播；之后通过构建数据交换区实现两种方法的耦合。结果表明，本文提出的谱元-有限差分混合方法能有效地模拟任意非均匀介质中的地震波传播，具有刻画复杂地形的能力，能处理自由地表边界条件，且能适应模型内的速度间断面。通过模型试算，并与谱元法进行对比，
Changzhi Xu +6 more
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Jianzhu Gangjiegou Jinzhan, 2022 采用理论推导和有限元方法，对冷成型不锈钢矩形管截面受弯构件的挠度发展与计算方法进行研究。在考虑截面应力分布和弯角影响的基础上推导出截面边缘屈服弯矩的计算公式，通过与301个算例的数值积分结果进行比较，验证了该计算公式的准确性。采用有限元软件ABAQUS建立了考虑几何初始缺陷和冷弯残余应力的精细有限元分析模型，依据现有试验结果对模型的准确性进行了验证。基于有限元分析结果对近似曲率法的初始刚度进行了修正，提出了修正的冷成型不锈钢矩形管截面受弯构件的挠度计算方法 ...
袁焕鑫, 郭鹏, 郭宇, 杜新喜
doaj
Cosserat-particle finite element method for large deformation analysis of rock and soil [PDF]
, 2023 The particle finite element method (PFEM) inherits the solid mathematical foundation of the finite element method and possesses the capability of modeling the problems with large deformation and complex boundary, so it has been widely used in the fields ...
Cui, J +4 more
core +1 more source
Topics as Outcomes: Modeling the Influence of Intergovernmental Grants on Policy Diffusion
Policy Studies Journal, EarlyView.ABSTRACT Intergovernmental grants stimulate the diffusion of policy reforms, as the federal government provides states with a financial incentive to adopt policies aligned with federal priorities. Less is known about the extent to which these grants also stimulate horizontal diffusion across states.
NaLette Brodnax, Sarah James
wiley +1 more source
Research on Correction of Near-Surface Elastic Wave Forward Modelling Based on Enlarged Cell Technique [PDF]
, 2016 地震学中的弹性波正演模拟是一件重要且不可缺少的事情，并且正演模拟的精度和速度往往直接决定了地球物理勘探的精度和速度。实际地球物理勘探应用中（如石油勘探、自然灾害预测），研究对象的巨大规模决定了人们对正演模拟的运行速度要求较高。时域有限差分（Finite-DifferenceTime-Domain，FDTD）方法是地震学中的一个稳定、灵活和有效的模拟工具，已经被广泛地开发和应用，并取得了极大的成功。交错网格时域有限差分（Staggered-GridFDTD）方法极其易并行 ...
魏松林
core
Whose Voices Are Heard? Parliamentary Committee Witnesses as Gendered Representatives
Politics &Policy, Volume 54, Issue 1, February 2026.ABSTRACT Are women sources of expertise for parliamentary policy discussions? In most parliaments, committees are the only venue where citizens can speak directly to the legislature; we argue that the proportion of women witnesses has implications for gender equality in policymaking. We present an original dataset of over 52,000 parliamentary committee
Elizabeth McCallion +1 more
wiley +1 more source
Theoretical Analysis and Numerical Investigation for Discontinuous Spectral Element Methods of Fractional Differential Equations [PDF]
, 2015 分数阶微积分方程是整数阶微积分方程的扩展，是含有非整数阶导数的方程，具有深刻的物理背景和丰富的理论内涵，在物理、机械、化学、生物、环境科学、工程以及金融等多个学科领域具有广泛的应用。 本文考虑几类分数阶微分方程初边值问题的理论、算法设计和分析，提出求解相关问题的有效高精度算法，并进行了系统的理论分析和数值试验。论文主要内容包括以下四个部分： 第一部分，即第二章，研究分布意义下间断函数的分数阶导数及其相关性质。首先我们引进在分布意义下间断函数的分数阶导数，研究新定义下的分数阶导数与Riemann ...
哈里曼·达力汗
core
International Journal of Urban and Regional Research, Volume 50, Issue 1, Page 191-220, January 2026.Abstract Henry George advocated for capturing land value increases for public ends. The active approach of public authorities organizing and financing land development can help capture higher land value increases, as Hartman and Spit indicate. However, this approach hardly happens in developing countries, where the coalition of private developers and ...
Nannan Xu
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