Results 11 to 20 of about 21,183 (172)
Rare Metals, EarlyView.ABSTRACT A major challenge in fabricating eutectic NiTiNb alloys is the incomplete melting of Nb due to its much higher melting point than the NiTi matrix. In this work, a novel electron‐beam freeform additive manufacturing strategy is developed to eliminate unmelted Nb particles and achieve a fully eutectic structure through independent dual‐wire ...
Qing‐Da Zhang +9 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT This study developed a FeSiAl@LMPGP composite material to address the demand for low‐frequency electromagnetic absorption. Through controllable heat treatment, FeSiAl particles and PbO nanoparticles self‐assembled into a high‐density Mott–Schottky heterointerface structure, which exhibited a significant built‐in electric field (BIEF) effect ...
Yuqi Wang +5 more
wiley +1 more source
Interface Issues of Inorganic Solid‐State Electrolytes in Secondary Magnesium Batteries
Rare Metals, EarlyView.ABSTRACT Solid‐state magnesium batteries (SSMBs) have gained significant attention as promising candidates for next‐generation safe energy storage systems because of the abundance of magnesium (Mg) in the earth's crust, superior energy density, and inherent nonflammability.
Jiren Wang +9 more
wiley +1 more source
Research of plasmonic metamaterial absorbers based on graphene [PDF]
, 2016 石墨烯，一种碳原子呈蜂窝状排布的二维单层晶体，因其特殊的性质在光电领域备受关注。然而，在可见光频域石墨烯的光吸收率仅为2.3%。为了增强光吸收效果，我们发现：石墨烯具备较低的阻抗损耗，通过与金属超材料纳米结构组合可以大大提高光吸收率。石墨烯内部还有电可调的等离激元，可用于电光调制吸收。由于石墨烯的等离谐振能够发生在不同的光学频段，基于石墨烯的光学器件因此具备波长选择特性。 本文基于以上设想，对石墨烯-光相互作用的研究从两个层面展开： 一是结合金属超材料结构，设计出波长可调的光吸收体 ...
李嘉晔
core
Rare Metals, EarlyView.ABSTRACT The development of high‐efficiency, stable, and scalable perovskite solar cells/perovskite solar modules (PSCs/PSMs) highly depends on the performance and cost‐effectiveness of functional layers such as electron transport layers (ETLs) and hole transport layers (HTLs).
Baochang Wang +11 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2022 详细分析了电场作用下四维Hindmarsh-Rose（HR）神经元模型的分岔模式及放电行为。通过数值仿真得到该神经元模型的多组双参数分岔图、最大Lyapunov指数图、峰峰间期分岔图等，发现该模型在双参数平面上存在倍周期分岔、加周期分岔等模式及“锯齿状”混沌结构。通过构建合适的目标函数，提出了自适应混合粒子群遗传算法，将神经元模型的参数辨识转化为最优化问题。数值仿真结果表明，算法对神经元模型的参数辨识效果较好，能更准确地辨识未知参数，具有一定优越性。
XIAORan(肖冉) +3 more
doaj +1 more source
Bridge Damage Detection under Structural Health Monitoring System Based on Influence Lines [PDF]
, 2016 在过去几十年内，中国修建了许多大跨径桥梁，这些桥梁一经建成就开始了结构劣化的过程，且损伤在整个服役期间不断累积，该类损伤甚至可能造成桥梁坍塌事故。因此，不少新建的大跨桥梁上都安装了结构健康监测系统，用以监测桥梁健康状态。但截止至目前，将健康监测系统的实测数据运用于桥梁损伤识别，至少有以下三点关键问题尚未有效解决：(1)从监测系统的实测数据中提取出对损伤敏感而对环境变化不敏感的损伤指标；(2)利用监测系统多传感器信息增强损伤决策的可信度；(3)优化传感器布置方案以达到最好的损伤识别效果 ...
蔡亲霖
core
Methods in Ecology and Evolution, EarlyView.Abstract DNA barcode‐based species identification has become pivotal in biodiversity research. Current barcoding‐based deep learning methods have advantages in species identification but exhibit significant limitations. By using COI barcoding alone, previous studies were unable to fully capture species identification features. Prior methods showed that
Bin Ye +4 more
wiley +1 more source
Gaoya dianqi, 2016 雷电参数的分布情况与地域、大气条件等诸多因素相关,因此,全面深入地分析相关因素对雷电参数分布的影响十分必要。文中以广东省雷电定位系统数据为基础,基于Google Earth软件截取典型样本区域进行研究。将样本区域经过处理导入Arc Map中进行雷电参数的筛选分析,利用Arc Map的投影功能,按UTM标准进行投影,得出该区域的面积,由此求出落雷密度。通过对不同的地形、地域的雷电参数统计分析,得出山地落雷密度比平原大;城市落雷密度较比乡村地区大;通过对不同月份的雷电参数统计分析,发现雷电参数的季节分布明显,
李瑞芳, 曹晓斌, 陈奎, 尹春
doaj
Zhejiang Daxue xuebao. Lixue ban, 2023 利用权函数方法和实分析技巧，讨论了一类非齐次核Kxρ1,m,yρ2,n=Gxρ1,mλ1yρ2,nλ2 (λ1λ2>0)的Hilbert型重积分不等式的搭配参数，得到最佳搭配参数的充分必要条件及最佳常数因子的表达式。利用所得结果，讨论了相应的重积分算子的有界性及算子范数。
洪勇(Hong Yong), 洪勇(Hong Yong)
doaj +1 more source