Results 21 to 30 of about 180,808 (235)
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Multifunctional thermal protective ceramic thermal/environmental barrier coatings (T/EBCs) are of great significance for applications of various high‐temperature components, and we propose an effective strategy for designing high‐entropy ceramics (HECs) as T/EBCs for SiC ceramic matrix composites (CMCs), where low thermal expansion ...
Qinshuo Wang +7 more
wiley +1 more source
, 2003 基于20 世纪60 年代 Halanay 和 Hale 关于微分系统平均性的思想 ,利用移动均值方法 ,研究了一类非线性具周期时滞系统的移动均值 ,利用移动均值方法和分区间分析方法证明了该类系统的平均化定理 ,得到了该类系统及其平均化系统解的渐近性行为.本文的分区间分析方法及 定理与以往研究的不同之处在于考虑了平均化系统中的时滞项.最后将结论应用到一个具有周期激励的时滞系统模型 ———非同期合闸产生的过电压模型 ,研究了该类系统在周期扰动和反馈控制下的稳定性问题 ,验证了本文所得结果 ...
宋文忠(东南大学自动化研究所) +3 more
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Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Esophageal squamous cell carcinoma (ESCC) remains associated with frequent local recurrence and distant metastasis despite advances in radiochemotherapy and immunotherapy, highlighting the need for therapeutic strategies that improve both local tumor control and systemic antitumor immune responses.
Dongdong Wang +7 more
wiley +1 more source
Wildlife Letters, Volume 4, Issue 3, Page 131-138, September 2026.Using a 3‐year, broad‐scale camera‐trap network in western Kansas, we tested whether coyotes and American badgers exhibit spatiotemporal patterns consistent with coordinated hunting. Despite high diel activity overlap, detection‐conditioned co‐detections occurred far less frequently than expected under independence, and short‐term temporal sequencing ...
Ty J. Werdel +3 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2018 研究了时间尺度上一类新的具有阻尼项的二阶非线性时滞中立型动力方程的振动性，基于时间尺度上的微积分理论、Riccati变换、H函数法和不等式技巧，得到了该方程振动的一些新的充分条件，推广了已有研究的结果，丰富了二阶时滞动力方程的振动性.最后，通过例子验证了相关结果.
SUNYuhong(孙玉虹) +2 more
doaj +1 more source
Alloy‐Type Anode Materials for Sodium‐Ion Batteries: From Single Metals to MultiComponent Alloys
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Sodium‐ion batteries (SIBs) are widely regarded as a promising alternative to lithium‐ion batteries due to their abundant sodium resources, broad geographical distribution, and low cost, rendering them particularly attractive for large‐scale energy storage applications.
Zicheng Yin +12 more
wiley +1 more source
State Feedback H∞ Control for Singular Time-delay Systems [PDF]
, 2008 广义系统是一类形式更一般化，并有着广泛应用背景的动力系统。自20世纪70年代以来，广义系统理论的研究已经取得了长足的进展，许多正常系统的结论被相继地推广到广义系统中。时滞是客观世界及工程实际中普遍存在的现象，关于时滞系统的研究，近年来也已有非常大的发展。广义系统中包含了大量带有时滞的广义系统，它是比正常时滞系统更加广泛的一类系统。在某些条件下，正常时滞系统可以视为广义时滞系统的一个特例；而且，有些问题只能用广义时滞系统加以描述，所以对它的研究具有重要的意义 ...
廖勇
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Gaoya dianqi, 2004 用有限元法对杯状纵磁真空灭弧室触头简化的轴对称模型涡流场进行了分析,给出了触头间隙中纵向磁场滞后时间的空间分布,讨论了触头设计参数对纵向磁场滞后时间的影响。计算结果表明,纵向磁场滞后时间沿径向分布的形状近似于凹面朝下的抛物线右半部,在触头边缘处纵向磁场滞后时间随径向位置增大而线性增加。纵向磁场滞后时间沿轴向的分布规律是,靠近触头中心处,纵向磁场滞后时间沿轴向的变化接近一条直线;越靠近触头边缘这种变化越显著,在杯壁中间处呈不规则的“正弦曲线”分布,在触头边缘处呈凹面朝上的抛物线分布 ...
刘志远 +3 more
doaj
Rhetorical Diffusion and Policy Latency: Tracing AIPAC Influence in US–Iran Relations (2010–2026)
Policy Studies Journal, Volume 54, Issue 3, August 2026.ABSTRACT How do domestic interest groups shape the transition from diplomatic agreements to kinetic warfare? This research article addresses the methodological stagnation in foreign policy analysis by introducing a computational text‐as‐data pipeline to systematically quantify lobbying influence.
Bülent Aras
wiley +1 more source