Results 31 to 40 of about 1,282,225 (155)
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT The use of Ti6Al4V alloy in dental implantation is constrained by its high elastic modulus and biological inertness, which lead to delayed osseointegration and a high failure risk. Additionally, its chemical incompatibility with hydroxyapatite (HA) impedes the development of stable bioactive composites.
Shangyong Zuo +8 more
wiley +1 more source
Dianci bileiqi, 2017 飘弧和弧道在湿污表面沿泄漏距离的延伸是局部电弧演变的主要环节。利用高速摄像机观测了不同极性直流局部电弧在湿污表面的演变过程,并从气体放电理论分析和解释了出现上述现象的原因。观测结果表明,负极性电弧比正极性电弧飘弧更严重,且负极性电弧延伸速率高于正极性电弧;电弧延伸过程中,正极性电弧更容易出现分叉和并列弧道的现象,负极性电弧更易出现尖状的头部。负极性电弧更易飘弧是由于电弧与污层之间的流注更易发展,使负极性电弧和污层之间更易保持良好的导电通道,所以飘弧更易维持,也更严重;正极性电弧端部紧贴污层表面 ...
金巧芳, 李亚伟
doaj
Zhejiang Daxue xuebao. Lixue ban, 2017 根据锚点位置固定有否，移动IP协议分为锚点固定的移动性管理协议和分布式移动性管理协议两类，后者允许移动节点在会话开始时动态地选择较近的接入路由器作为锚点，从而可以缩短切换时延并实现近似最优的路由.然而，对于给定的会话，锚点的位置是固定的，在会话持续时间内进行移动节点切换时，切换操作与锚点固定的移动性管理协议相同，存在切换时延长和路由欠优问题.为解决该问题，提出了应用双层指针的分布式移动性管理方案.使用“低层指针”在具有移动性管理功能的接入路由器间建立指向关系以缩短切换时延；使用“高层指针 ...
ZHUDeqing(朱德庆) +1 more
doaj +1 more source
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Heterogeneous structures have demonstrated great potential for overcoming the long‐standing strength–ductility trade‐off in metallic materials. In this study, a novel dual‐gradient structure, characterized by gradients in both grain size and precipitate distribution, was successfully constructed in an Mg–2Zn–0.8Gd (wt%) alloy sheet via sliding
Chunquan Liu +4 more
wiley +1 more source
Jianzhu Gangjiegou Jinzhan为了研究大高宽比矩形钢管混凝土柱的压弯性能，对大高宽比钢管混凝土短柱进行偏压试验并结合有限元模拟补充了4组试件进行对比，包括不同偏心率、高宽比、钢管壁厚度、截面尺寸情况下柱性能的对比分析。最后参考常用的4本国内外规范进行柱承载力计算，对比并判断现有规范是否适用。结果表明：试件破坏模式均为长边鼓曲，当荷载小于极限承载力的80%时，横截面高度上的应变分布服从平截面假定；随着偏心率增大柱延性先提升，在偏心率超过0.205后，柱延性开始下降；随着壁厚增加柱延性先提升，在壁厚达到8 mm后，柱延性开始下降 ...
陈安英 +4 more
doaj +2 more sources
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Photocatalytic hydrogen peroxide (H2O2) production from water and oxygen driven by solar energy represents a highly promising green and sustainable strategy. Herein, lignin‐derived carbon quantum dots (LCDs) were strategically introduced at the heterojunction between a Bi‐based metal organic framework (Bi‐MOF) and ZnIn2S4 (ZIS).
Wanpeng Sun +8 more
wiley +1 more source
Guangtongxin yanjiu, 2002 ATM- PON是光纤接入网的重要技术 .文章研究了业务穿越 ATM- PON接入网的延时和延时变化性能 ,着重分析媒体接入控制协议对业务延时和延时变化性能的影响 .研究结论对 ATM ...
苏厉, 金德鹏, 皇甫伟, 曾烈光
doaj
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Carbides strengthen the grain boundaries; nevertheless, excessive carbide precipitates embrittle the grain boundaries of high‐temperature alloys during prolonged service. Here, we provide direct evidence of solute rare‐earth atoms and demonstrate that they can trap vacancies and inhibit interstitial diffusion, restraining carbide precipitation
Jiali Zhang +10 more
wiley +1 more source
He jishu针对大型加速器定时系统中各节点因光纤长度差异引起的延时问题，提出了一种基于事件定时系统的深度优先多节点自动延时补偿算法，旨在解决因光纤长度差异导致的时间同步问题与长距离光纤传输带来的稳定性问题，并通过测量不同设备的触发信号到达时间，根据算法进行延时调整，采用125 MHz事件时钟，实现8 ns时间精度的延时补偿。在涉及6 m和30 m光纤长度的测试中，延时补偿成功实现了信号输出对齐，对齐精度约为5.5 ns，证明了该算法在保持不同光纤长度同步方面的有效性，该算法提高了事件定时系统的时间同步精度和稳定性 ...
彭 仲达 +3 more
doaj +1 more source
Boosting Decomposition and Combustion of TKX‐50 and HTPB/TKX‐50 Propellants With NH2‐MIL‐88B(Fe) MOF
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Dihydroxylammonium 5,5′‐bistetrazole‐1,1′‐diolate (TKX‐50) is a promising energetic material that possesses both exceptional energy density and low sensitivity. Nevertheless, its application is hindered by incomplete pyrolysis during combustion or explosion. Various strategies, including eutectic formation, composite preparation, and catalysis,
Jingwen Chen +10 more
wiley +1 more source