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関連する概念動画

Metallic Solids02:37

Metallic Solids

16.4K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and...
16.4K
Poisson's And Laplace's Equation01:25

Poisson's And Laplace's Equation

4.3K
The electric potential of the system can be calculated by relating it to the electric charge densities that give rise to the electric potential. The differential form of Gauss's law expresses the electric field's divergence in terms of the electric charge density.
4.3K
Electrostatic Boundary Conditions01:16

Electrostatic Boundary Conditions

1.2K
Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it undergoes a discontinuity. The electric field can be resolved into normal and tangential components. The amount by which the field changes at any boundary is given by the difference between the field components above and below the surface boundary.
The surface integral of an electric field is given by Gauss's law in integral form and is related to...
1.2K
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

2.1K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity....
2.1K
Boundary Conditions for Current Density01:25

Boundary Conditions for Current Density

1.5K
Current density becomes discontinuous across an interface of materials with different electrical conductivities. The normal component of the current density is continuous across the boundary.
1.5K
Differential Form of Maxwell's Equations01:17

Differential Form of Maxwell's Equations

1.5K
James Clerk Maxwell (1831–1879) was one of the significant contributors to physics in the nineteenth century. He is probably best known for having combined existing knowledge of the laws of electricity and the laws of magnetism with his insights to form a complete overarching electromagnetic theory, represented by Maxwell's equations. The four basic laws of electricity and magnetism were discovered experimentally through the work of physicists such as Oersted, Coulomb, Gauss, and...
1.5K

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関連する実験動画

Updated: Apr 29, 2026

Fabrication and Operation of a Nano-Optical Conveyor Belt
11:10

Fabrication and Operation of a Nano-Optical Conveyor Belt

Published on: August 26, 2015

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CCPRモデルのFDTDにおける分散型VP-EP適合メッシュアルゴリズム

Yuan Fan, Yuhao Zhou, Yanan Liu

    Optics express
    |February 20, 2026
    PubMed
    まとめ

    新しいアルゴリズムである分散体積-平均極化有効許容度 (D-VP-EP) は,複雑な3D材料の正確な分析を可能にします. この方法は,高度な電磁シミュレーションの計算リソースとメッシュエラーを大幅に削減します.

    科学分野:

    • コンピューティング用電磁力学
    • マテリアルサイエンス 材料科学

    背景:

    • 分散材料の正確なシミュレーションは,高度な電磁気アプリケーションにとって非常に重要です.
    • 有限差分時間領域 (FDTD) のような既存の方法は,複雑な幾何学と物質分散と闘っています.
    • コンフォームメッシュは分散材料で困難であり,エラーにつながります.

    研究 の 目的:

    • 3D分散材料を分析するための新しいアルゴリズム,分散体積-平均極化有効許容度 (D-VP-EP) を導入します.
    • FDTDのフレームワーク内で任意の極を持つ分散材料間のコンフォームメッシュを可能にするために.
    • 計算コストを削減し,電磁シミュレーションの精度を向上させる.

    主な方法:

    • FDTD法内の複合結合極残留 (CCPR) モデルを利用する.
    • 周波数域のフィッティングアルゴリズムと空間域のインターポレーションアルゴリズムを使用します.
    • 互換性のために,従来のCCPR-FDTDの繰り返し配列を維持する.

    主要な成果:

    • D-VP-EPアルゴリズムは,曲線なインターフェイスでメッシュ不一致のエラーを成功裏に削減します.
    • コンピューティングリソースを大幅に削減した既存の方法と比較できる精度 (1/16th) を達成しました.

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    Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
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    関連する実験動画

    Last Updated: Apr 29, 2026

    Fabrication and Operation of a Nano-Optical Conveyor Belt
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    Published on: August 26, 2015

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    Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing
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    Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturing

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  • ナノスフィアの分散シミュレーションとマイクロリングの伝送スペクトルのシミュレーションで実証された有効性.

    • 結論:

    • D-VP-EPアルゴリズムは,コンフォームメッシングによる3D分散材料のシミュレーションに効率的かつ正確なソリューションを提供します.
    • 伝統的な方法の限界を克服し,かなりの計算コストを削減します.
    • この進歩は,ナノフォトニックデバイスとメタマテリアルの設計と分析に重大な影響を及ぼします.