Results 21 to 30 of about 12,707 (126)
Shuitu Baochi Xuebao, 1993 从地貌发育的热扩散方程出发，考虑发育过程中的不可逆性和非线性特征，得到一个新的非线性微分方程。它遵循分形标度关系，并且与过程密切联系。通过分析解的构成，证实汇流频次，汇流路径地数正态分布。在近似条件下，汇流过程表现出１／ｆ噪声的时间效应，标志着它的自组织临界性，从而为研究汇流提供一种新的理论工具。
陈嵘 艾南山
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Zhejiang Daxue xuebao. Lixue ban, 2018 利用广义双黎卡提变换技术及一些分析技巧，研究了一类二阶Emden-Fowler型非线性中立型变时滞泛函微分方程的振荡性，获得了该类方程振荡的2个新的判别准则，推广并改进了现有文献中的一些结果.
ZHANGXiaojian(张晓建)
doaj +1 more source
Seismic Response Analysis and Damage Evaluation of Curved Continuous Rigid Frame Bridge [PDF]
, 2015 曲线桥具有线形适应性强、造型美观等优点，在我国的公路和城市桥梁中得到了广泛的运用。而连续刚构的形式因为能合理调整结构的受力情况，且避免设置支座，也深受设计者的青睐。近年来，地震频发，曲线桥与相同跨径的直线桥相比震害显著，连续刚构桥也显示出一些自身的震害特点。本文在总结曲线桥抗震研究进展、常见震害特点以及地震反应计算理论与损伤评估方法的基础上，以一座曲线连续刚构桥为工程背景，进行反应谱分析与时程分析，研究该桥在地震作用下的响应以及对其进行地震作用下的损伤评估。首先通过计算对比 ...
林灏
core
, 2017 结构在远场地震作用下的损伤与地震动的循环效应密切相关,基于标准化滞回耗能谱、累积延性比谱,提出了人字形中心支撑钢框架基于能量的性态设计方法。该方法给出了各构件累积滞回耗能的计算公式及各构件截面的设计方法。采用该方法设计了一个10层人字形中心支撑钢框架,选取了15条远场地震记录,采用Pushover分析方法和非线性时程分析方法对设计结构的抗震性能进行了评估。分析结果表明:结构在罕遇地震下出现了理想的屈服机构;在多遇地震和罕遇地震下,结构层间侧移角均满足建筑抗震设计规范的要求;结构层间变形比较均匀 ...
张海东, 顾强
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT The development of efficient and stable bifunctional electrocatalysts is a key challenge for the industrialization of hydrogen production by water electrolysis. In this work, Co‐doped NiS/Ni3S2 heterostructured nanowire arrays (Co–NiS/Ni3S2 NA) were successfully constructed by precisely modulating the phase‐selective behavior of nickel ...
Xing‐Hang Liu +2 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Tellurium (Te), emerging as a promising alternative to sulfur (S) and selenium (Se), offers significant advantages for potassium (K) ion storage due to its comparable theoretical volumetric capacity (2619 mAh cm−3) and higher electronic conductivity (∼102 S m−1), which promotes rapid charge transfer and improves reaction kinetics.
Sung Woo Cho +7 more
wiley +1 more source
Analysis on the damping effect of low yield point steel shear plate in frame structure [PDF]
, 2017 地震作为一种多发的自然灾害，是人类安居乐业的重大隐患，提升建筑物的抗震性能迫在眉睫。早期模式的建筑物依靠结构自身抵御外界荷载，难免造成主体破损，而添加了各类耗能装置的结构，则可以依靠耗能件有效吸收能量，减小主体结构的破损。 低屈服点钢剪切板作为一种新型材料的耗能件，具备良好的耗能性能，探讨将其应用于工程结构的抗震加固和设计有着重要的意义，笔者为此开展了低屈服点钢剪切板耗能件在框架结构中减震效果分析，具体工作如下： （1）介绍低屈服点钢剪切板耗能件的力学原理，探讨加入剪切板耗能件后结构的抗震分析方法 ...
刘晗
core
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Intervertebral disc degeneration (IDD) is a predominant cause of low back pain, significantly impacting quality of life. Mitochondrial fitness is essential in the progression of IDD, as it regulates cellular senescence and pyroptosis. This study investigates the role of mitochondrial caseinolytic protease P (ClpP) in alleviating senescence and
Kun Wang +7 more
wiley +1 more source
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
Journal of Linguistic Anthropology, Volume 35, Issue 2, August 2025.Abstract This article argues that social actors' media ideologies about digital interfaces are key to the enregisterment of online activities. Focusing on an online register emergent from user activities around Year, Hare, Affair (YHA)—a state‐aligned Chinese animation—I explore how different metadiscourses evaluate this register by entextualizing ...
Jiarui Sun
wiley +1 more source