Results 41 to 50 of about 1,050 (155)
Strengthening community‐based fisheries monitoring programs with Indigenous perspectives
Conservation Biology, Volume 40, Issue 2, April 2026.Abstract Community‐based monitoring (CBM) programs are increasingly recognized as essential for adaptive environmental stewardship. Yet, the CBM literature often highlights successful cases and privileges evaluations by external experts over those of community members themselves.
Kanwaljeet Dewan +2 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2014 根据顶底翼缘角钢半刚性连接的受力特性、变形特点和破坏形态,对顶底翼缘角钢半刚性连接的初始刚度和极限承载力进行了研究。利用组件法和最小值法对顶底翼缘角钢半刚性连接的初始刚度和极限承载力进行了理论推导,得到了解析表达式和拟合公式,并与试验数据进行了对比分析。研究结果表明:所提出的拟合表达式能够较为准确地计算出顶底翼缘角钢半刚性连接的初始刚度和极限承载力,且与试验数据吻合较好,为此类半刚性连接的实用计算方法创造了条件。
刘伟, 舒赣平
doaj
, 2008 阐述了地震力作用下饱和砂土液化机理及其液化影响因素,分析了厦门地区砂土的地震反应特性;依据建筑抗震设计规范的规定,综合考虑各液化影响因素间的相关性,提出了符合厦门砂土动力特性的砂土地基液化防治措施;并以厦门麦德龙商场强夯法处理可液化砂土地基为例,采用动力触探试验和标准贯入试验分析检验了强夯法在砂土液化防治中的效果;结果表明防治措施效果良好 ...
俞登荣, 胡华
core
How much biotic nativeness matters across human demographic groups
Conservation Biology, Volume 40, Issue 2, April 2026.Abstract Many central concepts of conservation biology—such as nativeness—are structured by ecological and social factors. However, the social consequences of using these concepts to make conservation decisions remain inadequately understood. Some researchers argue that nativeness, rather than acting as an objective proxy for important ecological ...
Harold N. Eyster, Rachelle K. Gould
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2013 节点刚度对钢结构的抗震性能有很大的影响。基于模态推覆分析MPA方法,初步探讨了节点半刚性对钢交错桁架在大震作用下抗震性能的影响。运用通用有限元软件SAP2000建立了平面模型,并修改节点塑性铰的属性和初始刚度来模拟钢交错桁架的半刚性节点,对比发现采用了半刚性节点的钢交错桁架,相对于完全刚接的情况,其基本自振周期、楼层侧移和层间位移角明显增大,塑性铰分布较为分散,数量减少,在大震下的耗能能力明显改善。
应浩, 梁锐, 赵海飞, 彭伟
doaj
Damage detection of beam-column joints in frame structures under seismic excitation based on extended Kalman filter [PDF]
, 2013 目前关于框架结构损伤诊断的研究大部分都着眼于框架结构梁柱单元的损伤,而实践证明,地震荷载下框架结构在梁柱连接节点处更容易发生损伤。然而对于复杂结构,其有限元模型存在大量的自由度,进而需要大量的传感器,相应的计算量也会加大。为了解决这一困难,文章首先用静力凝聚的方法把有限元模型降阶,然后再跟扩展卡尔曼滤波损伤识别算法结合起来进行结构的损伤识别,用一个6层钢框架的振动台试验数据对该方法进行试验验证,该试验数据由我国台湾大学罗俊雄教授提供。基于试验数据结果表明 ...
李青, 雷鹰
core
Informing spatial conservation prioritization with species’ traits
Conservation Biology, Volume 40, Issue 2, April 2026.Abstract New Guinea, the most botanically diverse island on the planet, is the location for one of the boldest conservation initiatives. The Manokwari Declaration aims to achieve 70% conservation designation for the Bird's Head Peninsula. This is 40% higher than the 2022 Global Biodiversity Framework target.
Liam A. Trethowan +27 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan, 2020 为了系统地研究杆件初弯曲对半刚接单层柱面网壳稳定承载力的影响,对5种矢跨比的半刚接网壳进行了双重非线性全过程分析。首先阐述了焊接球节点刚度及随机杆件初弯曲的确定方法,然后深入研究了杆件初弯曲对5种矢跨比的半刚接网壳稳定承载力的影响程度,最后探讨了具有杆件弯曲的半刚接网壳的破坏过程。研究结果表明,杆件初弯曲对半刚接网壳稳定承载力的影响程度与网壳矢跨比和初弯曲分布形式有关。如杆件初弯曲对矢跨比为1/3、1/4半刚接网壳的影响甚微,对矢跨比为1/5半刚接网壳的影响较为明显。矢跨比为1 ...
肖姚, 李会军
doaj
Time-Frequency Analysis of Air-coupled GPR Data for Identification of Delamination between Pavement Layers [PDF]
, 2017 随着国家对交通基础设施的投入加大，全国高速公路的里程数日益增加，随之而来的道路工程问题也日益扩大，造成严重的社会影响和经济损失。探地雷达作为一种高性能的无损检测工具，不仅在工程勘探结果上直观准确，而且操作简便高效，在公路病害无损检测中已经得到广泛应用。然而，受限于探地雷达的工作带宽，在一些数值上需要精确测量的工程问题方面，探地雷达的分辨率仍然无法满足要求。 本文主要关注高速公路沥青面层与混凝土基层之间的剥离问题，利用时频分析工具对不同厚度薄层的雷达反射复合波频谱特性进行研究 ...
邓志豪
core
Conservation Biology, Volume 40, Issue 2, April 2026.Abstract There exists a growing suite of technologies that support significant and exciting progress in biodiversity conservation and research. Citizen scientist participation is common in this research and often focuses on data collection and labeling.
Joycelyn Longdon +5 more
wiley +1 more source