Results 71 to 80 of about 1,210,655 (177)
Resource Substitution: Local Governments' Issue Attention and Policy Reinvention
Policy Studies Journal, Volume 54, Issue 4, November 2026.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
具有时滞的周期Lotka-Volterra系统的持久性与渐进稳定性(英文)
四川大学学报. 自然科学版, 2004 研究了具有反馈的Lotka Volterra方程,给出了其正解具有持久性的充分条件.并利用Horn不动点定理,得到其正周期解的存在性.
曾永福, 徐道义
doaj
, 2016 本发明提供了一种正极支撑型的钠镍电池。该钠镍电池以正极作为强度支撑，正极采用多孔隙结构的支撑体，电解质则是位于支撑体一侧的薄膜层，正极活性材料Ni、NaCl颗粒以及熔融的NaAlCl4分布填充在该孔隙中，并且该孔隙形成连通至电解质层的通道。与现有技术相比，本发明能够实现电解质薄膜化，有效降低了电解质层的厚度，从而降低了钠镍电池的工作温度 ...
官万兵, 王建新
core
Regional News, Regional Bias? Evidence From Media Discourses and Welfare Decisions in Germany
Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT How do media representations of immigrants shape their treatment by street‐level bureaucrats? Despite a uniform federal legal framework, decision‐making varies substantially across local welfare offices. Though prior research links national news reporting and policy implementation, little is known about how regional variation in news reporting
Stefanie Rueß
wiley +1 more source
From the Margins: Potential Coalitions in Centralized, High‐Capacity States
Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT The early stages of coalition formation remain an understudied area, particularly in centralized, high‐capacity political systems. Examining actor dynamics at this formative stage can reveal how coalitions form and how limited pluralism constrains their development.
Sreeja Nair, Yuhao Ba, Mohnish Kedia
wiley +1 more source
THE STUDY OF THE DIRECT KINEMATICS FOR A CLASS OF 6-SPS PARALLEL ROBOT BASED ON SYMBOLIC COMPUTATION
, 1999 并联机器人运动学正解问题是一个重要而且难以解决的问题．本文利用符号计算工具，应用Ｄｉａｌｙｔｉｃ消元法，对一类６－ＳＰＳ并联机器人的运动学正解问题进行研究．得到一个变元多项式方程，给出了正解的解析解．在此基础上确定其工作空间，求出其解范围内全部实解．此种方法对于一般６ ...
王奇志, 徐心和
core
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Surface‐enhanced Raman scattering (SERS) has emerged as a highly sensitive and specific technique for tumor imaging, owing to its narrow spectral features, resistance to photobleaching, and capability for multiplexed detection. However, its clinical translation remains limited by poor tissue penetration and the absence of intrinsic anatomical ...
Xinyu Miao +7 more
wiley +1 more source
四川大学学报. 自然科学版, 2008 利用积分方程,作者通过构造适当的Banach空间考察了一类含有一阶导数的二阶三点边值问题的解和正解的存在性.利用Leray-Schauder不动点定理,作者证明了只要非线性项在其定义域的某个有界子集上的"高度"是适当的则该类问题可以有一个解或者正解.
姚庆六
doaj
, 2013 环己烷液相氧化制备环己醇与环己酮（K/A 油）是重要的石油化工过程。其中，环己基过氧化氢（CHHP）是环己烷氧化的重要中间体，CHHP分解是环己烷氧化的关键步骤之一。目前工业分解CHHP的方法为碱分解法，该方法K/A油的总选择性较低，而且反应过程中消耗大量NaOH，产生的废碱渣对环境污染严重。如何实现无碱高效分解CHHP，对节约资源，降低生产成本，实现清洁生产和环境保护，具有重要的科学意义和应用价值。 论文首次对氮正离子-过渡金属均相催化CHHP分解的性能进行研究 ...
郑玺
core
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Lithium‐rich manganese‐based cathodes (LRM) deliver high discharge capacities beyond 250 mAh g−1, but their practical deployment is restricted by irreversible oxygen redox, structural reconstruction, sluggish kinetics and unstable cathode‐electrolyte interfaces (CEI). Here, we develop a colloid‐assisted anchoring‐diffusion engineering strategy
Jia‐Nan Hao +13 more
wiley +1 more source