Results 51 to 60 of about 17,879 (217)
How Does Nature‐Based Education Contribute to Green and Low‐Carbon Development? 基于自然的教育如何助力绿色低碳发展
Integrative Conservation, Volume 4, Issue 2, Page 126-133, June 2025.This visualization demonstrates how Nature‐Based Education (NBE) supports green and low‐carbon development. Key components include nature schools, carbon‐neutral campus initiatives, and experiential learning, which enhance carbon literacy and sustainability practices.
Linyu Xu, Yuqi Dai
wiley +1 more source
Guangtongxin yanjiu, 2000 介绍了高速 SDH系统中的帧同步器的设计 ,分析了影响帧同步器性能的参数选择。在分析的基础上 ,以 STM- 4为例选择帧同步器参数和帧同步码组 ,实现了一种应用于高速SDH系统的并行帧同步器的设计。
沙燕萍, 曾烈光
doaj
Integrative Conservation, Volume 4, Issue 2, Page 134-142, June 2025.Our study addresses the significant knowledge gap regarding the wintering population and habitat utilization of the Yellow‐breasted Bunting (Emberiza aureola) in Nepal, providing crucial insights that can aid in the conservation of this critically endangered species in wintering grounds.
Hem Bahadur Katuwal +6 more
wiley +1 more source
Nitrogen Transports and Transformations in Mangrove Sediments using Nitrogen Isotope Techniques in China [PDF]
, 2012 人类活动对生态系统的影响日益扩大，过量施肥、化石燃料的燃烧等引发的氮(N)负荷迅速增加。陆地生态系统过剩的N通过流域汇集至河口和海岸，威胁着海洋生态系统的健康。目前，全球N循环正致力于揭示河口和海岸地区N的源汇格局及主导机制。红树林湿地广泛分布于热带、亚热带河口和海岸地区，作为陆源营养盐入海过渡带，在缓解陆源N输入方面扮演着重要角色，成为了研究的热点。 本研究利用N稳定同位素技术，将现场培养与室内模拟培养相结合，揭示了我国东南沿海典型河口和海湾红树林湿地沉积物总氮沉积、固氮作用、反硝化作用 ...
李颖
core
Guangtongxin yanjiu, 2007 文章采用全矢量有限元法（FVFEM）对不同结构参数的光子晶体光纤（PCF）进行数值分析,得出了基模模场分布,进而计算出高非线性PCF非线性特性的两个重要的基本物理量:有效面积Aeff和非线性系数γ,并分析了Aeff和γ与PCF的结构参数空气孔直径d和空气孔间距Λ之间的关系。
吴铭, 刘海荣, 黄德修
doaj
Jianzhu Gangjiegou Jinzhan, 2022 为了揭示预制钢管混凝土叠合柱与预制部分包裹混凝土（PEC）梁螺栓连接节点的受力性能和破坏模式，通过ABAQUS有限元软件建立了该组合节点的有限元分析模型，考虑了材料本构关系和复杂接触问题。通过水平低周往复荷载试验验证了数值分析模型的准确性，对其破坏模式和骨架曲线进行了研究。考虑了几何参数、材料参数、荷载参数对节点力学性能的影响，揭示了多种参数对于节点性能的影响规律。结果表明，预制钢管混凝土叠合柱与预制部分包裹混凝土组合梁全螺栓节点具有良好的受力性能，柱钢材强度、柱混凝土强度、轴压比 ...
王静峰, 王翰斓, 郭磊, 郭翔
doaj
World Medical &Health Policy, Volume 17, Issue 2, Page 231-247, June 2025.ABSTRACT During the pandemic, mobile vaccination units administered COVID‐19 shots to homebound populations. This study explores the perspectives of public healthcare providers involved in Greece's COVID‐19 home vaccination program, aiming to identify challenges and inform improvements in delivering healthcare services at home.
Dimitra Iosifina Papageorgiou +26 more
wiley +1 more source
Nonlinear finite element analysis for seismic performance of high-strength concrete beam-column joints with new reinforcement details [PDF]
, 2006 Because the factors that affect the behavior of the beam-column joints are complicated, an experimental study alone is not sufficient. Therefore, a nonlinear finite element analysis was conducted to provide better understanding of the performance of the ...
Gan, L, Li, J, Pam, HJ
core
Jianzhu Gangjiegou Jinzhan, 2017 为了考察材料本构模型参数对构件滞回性能模拟的影响,利用通用有限元软件ABAQUS对H形截面钢构件绕强轴压弯的滞回特性进行了数值模拟研究,对比分析了Ramberg-Osgood模型应变硬化指数和两折线模型强化率的参数取值对低周往复荷载作用下构件的极限抗弯承载力、极限后性能模拟结果的影响。分析表明,在所研究的材料强化参数变化范围内,构件极限抗弯承载力的相应变化是有限的;但构件的残余位移、耗能能力等大范围塑性变形阶段的模拟结果对两类材料模型强化参数均表现出很强的敏感性。基于以上分析结果 ...
张婉越, 陈以一
doaj
Forest citizens and people‐centered conservation in the Brazilian Amazon
Conservation Biology, Volume 39, Issue 3, June 2025.Abstract Demands for territorial recognition are foundational to the claiming of rights by forest‐proximate people who attempt to conserve their forests. The rights of these often‐marginalized populations have been largely overlooked by conservationists, yet they are central to achieving people‐centered conservation. We further developed the concept of
Luke Parry +9 more
wiley +1 more source