Results 11 to 20 of about 966,152 (186)
Guangtongxin yanjiu, 2014 为了满足现代无线通信的要求,应用FEM（有限元法）编程计算出倒梯形单脊波导的截止波长和损耗系数,在考虑缝隙间互耦的情况下,采用行波近似计算了倒梯形脊波导缝隙阵的有源导纳,结合HFSS（三维高频结构电磁场仿真）软件提取了缝隙的归一化有源导纳,设计了一种新型的26元X波段倒梯形单脊波导缝隙行波阵。仿真结果表明,副瓣电平<-25dB,具有良好的驻波特性。
黄庆福, 陈小强
doaj +2 more sources
, 2023 控制圆柱体或翼型的行波壁会抑制大规模的分离流动，进而减少阻力。鱼类在游动过程中经常出现行波壁，而行波壁对鱼类游动性能的影响机制尚不清楚。以金枪鱼游动为基础，耦合行波壁，采用锐利界面浸没边界法（IBM）解决摆动过程带来的大变形运动边界问题。结果表明：行波壁的出现改变了金枪鱼体后涡的形成和发展，进而改变了摩擦阻力和压差阻力的分布；耦合行波壁使得摩擦阻力的波动幅值增加，压差阻力有所减小，从而降低了金枪鱼游动过程的阻力。研究的行波壁减阻机制可应用于提高仿生机器鱼的性能，随着智能材料的发展 ...
王一伟 +4 more
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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
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
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Because magnetic permeability is an intrinsic property of materials, achieving the regulation of magnetic loss is one of the challenges for electromagnetic wave absorption materials. This paper focuses on the research idea of in situ growth of dispersed nanocrystalline FeSiB in an amorphous FeSiB matrix to regulate magnetic properties.
Lei Wang +4 more
wiley +1 more source
Structural Modulation of Magnetic Softness in Fe‐Based Amorphous Alloys via Pulse Current Training
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Fe‐based amorphous alloys, despite their intrinsically low magnetocrystalline anisotropy, suffer from quasi‐dislocation dipoles and localized stress fields that impede domain‐wall motion and increase coercivity. Here, we introduce pulse current training (PCT) as an energy‐efficient technique to overcome these limitations in a Fe76Si9B10P5 ...
Shumin Ye +13 more
wiley +1 more source
Rare Metals, Volume 45, Issue 5, May 2026.ABSTRACT Integrating light emission and electromagnetic wave (EMW) absorption into a single material opens up possibilities for multienvironmental applications. Herein, we propose a novel “molecular engineering‐pyrolysis conversion” strategy to construct a bifunctional system with tunable photoluminescence and efficient EMW absorption performance.
Renjie Wang +7 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
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Jellyfish blooms restructure plankton dynamics and trophic linkages in coastal waters
Functional Ecology, Volume 40, Issue 5, Page 1443-1460, May 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract Jellyfish blooms are increasing globally in frequency and intensity, introducing complex ecological interactions, yet the mechanisms by which they alter ecosystem structure remain poorly characterized due to a lack of sustained field observations.
Pengpeng Wang +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
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