Results 21 to 30 of about 1,014,590 (123)
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Bio‐inspired artificial vision systems have made significant progress, but most focus on photo‐receptors, neglecting the hardware implementation of the efficient downstream neural circuits for complex computations like motion detection. To overcome this bottleneck, we demonstrate a neuromorphic vision system that mimics Drosophila's motion ...
Xianyu Hu +4 more
wiley +1 more source
Gaoya dianqi, 2019 行波传输速度是影响行波测距精度的关键因素之一,输电线路上暂态行波速度的难以确定严重制约了行波测距精度。对此,文中从优化行波传输速度着手,提出一种多回输电线路行波故障精确测距方法。首先基于波速误差对输电线路行波测距精度的影响,分析了现存行波波速确定方法的优劣。进一步,基于同杆多回输电线路共用输电走廊的结构特点,在非故障线路上实时在线测量出行波速度,并将其应用于故障线路的精确行波测距计算中。理论分析和仿真数据均表明:此方法不受线路参数的影响,能有效克服环境因素给沿线波速带来的误差 ...
田斌 +5 more
doaj
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT In this work, In2O3 and three rare earth (RE)‐doped In2O3 composites (Ho, Yb, and Sm‐doped) were prepared via the hydrothermal method. Compared with In2O3 sensors, those fabricated from the three composite materials (RE–In2O3) exhibit varying degrees of enhanced response toward ethylene glycol (EG) gas. At 35% relative humidity (RH) and 250°C,
Chang Liu +9 more
wiley +1 more source
Typological Classification and the Chronology of Iron Age pottery in central-southern Britain [PDF]
, 2012 Pottery has been one of the most popular artefacts in the study of the Iron Age in central-southern Britain because of its advantages of commonality, durability and volume.
NISHITANI, AKIRA
core
Gaoya dianqi, 2017 识别第2个反向行波来自故障点还是对端母线是实现单端行波故障测距的关键,对此,提出一种识别第2个反向行波性质的新方法。通过分析4种类型的行波传播路径,得到透射线模行波与非透射线模行波到达测量端的时间顺序,从而辨识出由故障点交叉透射的初始线模行波,再利用初始透射线模行波与第2个线模反向行波之间的极性关系构造了识别第2个反向行波性质的判据。仿真结果表明:所提方法基本不受母线结构、模量衰减和透射模量的影响,具有较好的可靠性。
江雪晨, 张翠玲, 宁一
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT To address the demand for high‐temperature stability, broadband strong absorption, and multifunctional integration of electromagnetic wave absorbing materials in complex service environments, lightweight molybdenum disulfide (MoS2) decorated silicon carbide (SiC) nanofiber composite aerogels with a directional layered interconnected structure ...
Zhi Song +4 more
wiley +1 more source
表面進行波を利用した極微細線加工法に関する基礎的研究 [PDF]
, 1989 1.進行波励振法の確立 引抜きダイス上での進行波伝播は以下にようにして行った。高周波電力で圧電振動子を機械振動し、それをホ-ンで増幅し、ダイス前面を励振する。ダイス内を前面から後面へ伝播した振動を継続的に後面へ進行させるためには後面に励振と同様の組合わせであるホ-ン、圧電振動子を接続し、振動子で機械振動を電気エネルギに変換、このエネルギを電気回路中の抵抗器で消散させる。誘電体でもある振動子の静電容量を補償するため、L=7.25mHのインダクタンスを接続し、抵抗値は機械的と電気的インピ ...
妹尾, 允史, 森, 敏彦
core
Gaoya dianqi, 2016 针对行波在电网传输过程中存在畸变现象,文中以某110 k V电网（共计15个变电站节点）为例,对行波传播过程进行了仿真,分析了行波到达时间与传播路径的关系,及各站点行波信号的时频域特性。利用EMD-HHT算法计算得到行波的到达时间,利用动力学理论计算了行波头前0.5 ms（共计1 000个样点）波形的Kolmogorov熵及分维数F,研究发现:行波信号的K熵及分维数F随传播距离增加,呈减少趋势,且邻近线路或环网节点的指数分布数值相近,该结论可定性判断行波源的大致位置。
李毅, 吴政球, 李建奇
doaj
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The development of lightweight, high‐attenuation, and broadband carbon‐based electromagnetic wave absorbers is hindered by the intrinsic trade‐off between impedance matching and dielectric dissipation. Herein, we report a facile and scalable synthesis of N‐doped lignin‐derived interconnected porous carbon (Nx‐LIPC) via hydrogen‐bond self ...
Bin‐Peng Zhang +7 more
wiley +1 more source
, 2002 本文着重介绍乘波飞行器构形的基础性问题。首先说明了高超声速流动的基本特色和高超声速飞行器气动布局面临的问题,在此基础上叙述了乘波飞行器的历史飞行原理,基本布局生成方法。同时还分析了转捩位置 ...
王发民, 姚文秀, 雷麦芳
core +1 more source