Results 11 to 20 of about 13,777 (167)
[[alternative]]Analysis of Earing in Deep Drawing Process of Metal Sheet [PDF]
, 2009 計畫編號：NSC90-2212-E032-012研究期間：200108~200207研究經費：588,000[[sponsorship ...
李經綸
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Effects of political identity activation and inaccurate metaperceptions on attitudes toward wolves
Conservation Biology, EarlyView.Abstract Polarization between groups can undermine durable conservation outcomes. Activating group identities (i.e., an individual's sense of self derived from membership in a group) can exacerbate differences, especially when people hold inaccurate perceptions of their peers and rivals.
Alexander L. Metcalf, Justin W. Angle
wiley +1 more source
A New Finite Element Formulation for Superconvergent Eigenvalue Computation of Wave Equations [PDF]
, 2016 有限元方法是目前结构分析领域应用最为广泛的一种数值方法。自振频率计算作为结构分析中的一个重要内容，可归结为典型的特征值问题，例如：一维波动方程可描述杆结构振动，其特征值为杆结构自振频率；二维波动方程可描述膜结构振动，相应的特征值为膜结构自振频率；三维波动方程可描述声压在空间中的传播，其特征值为声压的振动频率。采用有限元法求解波动方程特征值问题时，质量矩阵的构造方法会直接影响振动频率的计算精度。因而，如何构造可使自振频率有更高收敛阶次及精度的高阶质量矩阵具有重要的研究价值。然而 ...
李希伟
core
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
Resource Substitution: Local Governments' Issue Attention and Policy Reinvention
Policy Studies Journal, EarlyView.ABSTRACT Research on policy reinvention, where a government modifies rather than replicates policy innovations introduced by other governments, has progressed significantly, but how it is influenced by the government's issue attention has not been thoroughly examined.
Yingxin Zhang, Yixue Yao, Kaifeng Yang
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
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Metal‐doped carbon‐based nanomaterials (M‐CNM) play a strategically significant role in next‐generation precision antibacterial and antitumor therapies, as they integrate synergistic photothermal ablation, catalytic reactive oxygen species (ROS) generation, and multimodal imaging capabilities. However, their clinical translation is hindered by
Pengxiang Liu +5 more
wiley +1 more source
Finite Element Analysis for Maxwell's Eigenvalue Problems [PDF]
, 2016 在微波工程中，波导和谐振腔都是十分重要的微波器件，这些微波器件广泛地用于 我们的现实生活中.在波导问题中，如果电磁波的频率给定，那么传播常数就是一个非常重要的物理参数.在谐振腔问题中，谐振频率是一个十分重要的物理参数.当波导横截面不规则或者填充有非均匀介质时，此时波导问题的解析解是很难找到的;当腔体的几何结构十分复杂或者填充有非均匀介质时，此时谐振腔问题的谐振频率的精确解也是很难找到的.但是我们往往需要知道这些微波工程器件的这些物理参数，所以通常采用数值方法去近似求解它们 ...
姜威
core
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT The inherent brittleness of hardmetals stems from the rigid covalent bond in the ceramic matrix and the sharp ceramic/metal interface, which restricts the nucleation and motion of dislocations. In this study, a novel strategy is proposed to activate significant dislocation behaviors in the WC matrix by employing a non‐equiatomic CoNiFeCr ...
Cheng Qian +9 more
wiley +1 more source
World Water Policy, Volume 12, Issue 2, May 2026.ABSTRACT Transnational collaboration is critical for water‐security innovation, yet actor configurations and thematic priorities remain poorly characterized. We surveyed 92 Australian and Brazilian researchers from the Tropical Water Research Alliance (TWRA), analyzing 11 sets of binary variables on collaboration modes, stakeholders, implementation ...
A. P. Matei +7 more
wiley +1 more source