Results 141 to 150 of about 23,739 (228)
地震波作用下边坡稳定性的区域化时程分析 Zonal Time History Analysis on Slope Stability under Seismic Excitation
, 2013 陈臻林 +5 more
semanticscholar +1 more source
Review of Policy Research, Volume 43, Issue 2, March 2026.ABSTRACT We trace the shift from a nascent to a mature policy subsystem by examining a hitherto overlooked aspect in policy process scholarship: the relationship between advocacy coalition beliefs and the narratives they express over time. The empirical focus of this case study is Sweden's Preventing and Countering Violent Extremism (P/CVE) policies ...
Simone Grännsjö +3 more
wiley +1 more source
短路电流中只有交流分量时的交流高压断路器燃弧时间差的概率分布特性
Gaoya dianqi, 1994 根据三相电路的开断过程,提出了分析和计算燃弧时间差的方法,据此求出中性点接地与不接地系统的短路电流中只有交流分量时,燃弧时间差的分布规律.
曹荣江, 顾霓鸿, 盛勇
doaj
NEPA “Modernization”: From the Trump Administration to the Biden Administration
Review of Policy Research, Volume 43, Issue 2, March 2026.ABSTRACT Researchers have recently examined changes to American environmental policy under the Trump administration's first term, and to a lesser extent, under the Biden administration. Scholars have largely not considered changes to the National Environmental Policy Act (NEPA), one of the earliest environmental laws in the United States, and a law ...
Michelle L. Edwards
wiley +1 more source
World Water Policy, Volume 12, Issue 1, February 2026.ABSTRACT This paper examines the rise and collapse of the 2021 United Arab Emirates (UAE)–Israel–Jordan Water‐for‐Energy Deal, a landmark initiative that sought to exchange Jordanian solar energy for Israeli desalinated water. Presented as a breakthrough in regional cooperation and environmental peacebuilding, the agreement was brokered under the ...
Majed Abu‐Zreig, Hussam Hussein
wiley +1 more source
Shiyou jixie, 2015 为解决连续循环钻井系统在分流增压作业过程中出现的钻井液循环压力波动的问题,通过对连接循环钻井系统分流增压作业过程分析，建立了相应的数学物理模型通过对连接循环钻井系统分流增压作业过程分析，建立了数学物理模型，通过仿真分析对引起系统压力波动的机理进行了研究，提出了优化方案，并进行了试验验证。分析结果表明，增压过程中因分流而导致循环流量快速下降是引起系统压力波动的主要原因；选取合适的控制阀，调节相应的节流控制参数，可以有效减小泵压波动的幅度；预填充时尽量完全排走腔体内的残余气体 ...
眭越, 马青芳, 胡志坚
doaj
Dizhen xuebao利用机器学习中的主成分分析法（PCA）提取了2022年泸定MS6.8地震的M5.0余震（2022年10月22日）的特征主成分时程，对泸定MS6.8主震的地震动时程进行模拟。在此过程中，将主震目标台站的地震动峰值加速度和反应谱作为约束条件，利用粒子群优化（PSO）算法计算特征主成分时程的组合系数。结果显示模拟结果与真实记录较为一致。这表明：利用机器学习算法能够通过提取余震的特征主成分时程对目标地震进行模拟；在进行小区域地震动模拟时 ...
Kai Chen, Hua Pan
doaj +1 more source
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Urgency to save species from extinction has prompted increased investment in law enforcement in protected areas. To date, such law enforcement has largely focused on increasing costs and reducing opportunities for offending. However, these resource‐intensive approaches are not always effective and can contribute to conflict between people and ...
Freya A. V. St. John +3 more
wiley +1 more source
Effects of landscape fragmentation on floodplain fishes as revealed by species–habitat networks
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract How species interact with habitat patches is influenced primarily by habitat configuration (e.g., connectivity) and species’ functional traits. As levels of fragmentation increase, identifying the intricate connections between these components is crucial for biodiversity conservation.
Chen Zhang +8 more
wiley +1 more source