Results 21 to 30 of about 8,015 (147)
Jianzhu Gangjiegou Jinzhan, 2021 为了研究端板型冷弯薄壁钢管混凝土框架连接节点的滞回性能,进行了4个节点试件的低周反复加载试验,研究了不同端板类型和钢管厚度下,连接节点试件的破坏形式、弯矩-转角关系、骨架曲线、节点刚性评价、耗能能力以及典型部位的应变分布。试验结果表明:外伸端板连接节点和钢管厚度为3 mm的平齐端板连接节点具有较高的强度、刚度和较好的抗弯性能、抗震性能及延性;钢管厚度为1.5 mm的平齐端板连接节点的滞回曲线呈捏缩状,耗能性能稍弱;在采取可靠的构造措施后,此类节点能用于实际工程。
陈馨怡, 王静峰, 郭水平
doaj
Jianzhu Gangjiegou Jinzhan, 2023 基于可恢复功能的抗震设计理念，提出了一种带有摩擦耗能组件的可更换拼接连接节点，该节点由H形钢柱、悬臂段、H形钢梁、可更换的翼缘连接板和摩擦铰组成。利用有限元软件ABAQUS建立节点的有限元模型并对其进行拟静力分析，通过更改翼缘连接板强度和厚度、削弱区深度和长度、转动螺栓的直径和数量，探究不同设计参数对节点的滞回性能、承载力、刚度以及位移延性的影响。结果表明：可更换拼接连接节点的承载力、刚度、总耗能等随着翼缘连接板强度和摩擦铰摩擦力的增大而提高 ...
杨元强 +4 more
doaj
Jianzhu Gangjiegou Jinzhan, 2023 对带U形连接件的肋板加强式钢梁-H形钢柱弱轴端板连接节点的抗震性能开展数值研究。在验证有限元模型准确性的基础上，分析了U形连接件厚度、加强肋板长度、加强肋板高度和梁端端板厚度对该节点破坏模式、抗弯承载力及抗震性能的影响。结果表明：该节点属于典型的梁柱半刚性连接节点，具有较好的转动能力；在H形钢柱弱轴设置U形连接件可使其与柱腹板和翼缘形成箱形节点域，增大节点域体积和抗剪切变形能力，提高节点抗弯承载力。U形连接件厚度取为0.83tf ~1.16tf （tf 为柱翼缘厚度）时 ...
聂少锋 +4 more
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Social-based routing in pocket switched networks [PDF]
, 2015 In pocket switched network,how to make effective balance between the message delivery ratio and transmis-sion delay is a problem to be solved.A community-based PSN routing algorithm,named BridgingCom,is proposed.It uses local community detection method ...
ANGJing Y +4 more
core +1 more source
Jianzhu Gangjiegou Jinzhan, 2021 对采用钢板攻丝高强螺栓连接的钢框架节点分别进行了高强螺栓拉伸及剪切试验、钢柱法兰连接节点静力及拟静力试验、梁柱半刚性连接静力试验。基于试验数据对节点连接的承载能力、失效模式以及刚度特征等关键问题进行了分析。研究结果表明:由自攻螺纹钢板及高强螺栓构成的连接形式具有良好的抗拉、抗剪性能,以螺杆断裂为最终破坏模式;钢柱法兰连接中法兰板无明显滑移及翘曲,高强螺栓没有拔出或断裂,试件表现出较好的延性和承载能力;梁柱连接表现出典型半刚性特征,桁架梁先于节点域发生破坏,破坏特征为桁架弦杆屈服及斜腹杆屈曲,节点连接符合"
贾斌 +4 more
doaj
Topology restoration algorithm for heterogeneous sensor networks based on connected dominating tree [PDF]
, 2012 For currently lacking the study of the topology restoration algorithm for heterogeneous sensor networks,a topology restoration algorithm for heterogeneous sensor networks based on connected dominating tree (HSNTR) was proposed.Firstly the algorithm ...
Ting-jun SHI, Xu-ming FANG, Yun YANG
core
External validation of QUiPP App in three independent European cohorts of symptomatic women
Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 2, Page 163-174, August 2025.ABSTRACT Objective To validate externally the QUantitative Innovation in Predicting Preterm birth (QUiPP) App v.2 for the prediction of spontaneous preterm birth (sPTB) in symptomatic women attending tertiary care in Europe. Methods The QUiPP App v.2 was validated in three independent datasets: a prospective European multicenter cohort across five ...
A. M. Fischer +8 more
wiley +1 more source
Integrative Conservation, Volume 3, Issue 4, Page 312-329, December 2024.Biosphere reserves aim to protect global biodiversity alongside social and economic development. In the Cape Floristic Region, biosphere reserves are an effective conservation approach to protect arthropods against habitat transformation in this biodiverse region.
Michael J. Samways +3 more
wiley +1 more source
, 2019 调研科技文献作者相关性研究发展进展，对作者相关度算法进行系统化的分析和对比。从网络拓扑 相似度算法入手，梳理和分析面向合作预测领域的作者相关度算法，分析和比较各种常用算法的优劣。对科技文 献作者相关度算法进行系统梳理，分析重点方法的基本原理、优缺点并展望未来发展方向。
单嵩岩, 吴振新
core
Identification Method for Nodal Price Multiplicity in Electricity Markets [PDF]
, 2017 In electricity markets, the stepwise supply and demand curves may yield multiple clearing prices. Considering the possibility of rare occurrence of this circumstance, a simple and effective identification method can significantly reduce the computational
Ding, Y +4 more
core +1 more source