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関連する概念動画

Space-Time Curvature and the General Theory of Relativity01:17

Space-Time Curvature and the General Theory of Relativity

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In 1905, Albert Einstein published his special theory of relativity. According to this theory, no matter in the universe can attain a speed greater than the speed of light in a vacuum, which thus serves as the speed limit of the universe.
This has been verified in many experiments. However, space and time are no longer absolute. Two observers moving relative to one another do not agree on the length of objects or the passage of time. The mechanics of objects based on Newton's laws of...
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Space Trusses01:25

Space Trusses

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A space truss is a three-dimensional counterpart of a planar truss. These structures consist of members connected at their ends, often utilizing ball-and-socket joints to create a stable and versatile framework. The space truss is widely used in various construction projects due to its adaptability and capacity to withstand complex loads.
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State Space Representation01:27

State Space Representation

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The frequency-domain technique, commonly used in analyzing and designing feedback control systems, is effective for linear, time-invariant systems. However, it falls short when dealing with nonlinear, time-varying, and multiple-input multiple-output systems. The time-domain or state-space approach addresses these limitations by utilizing state variables to construct simultaneous, first-order differential equations, known as state equations, for an nth-order system.
Consider an RLC circuit, a...
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Space Trusses: Problem Solving01:29

Space Trusses: Problem Solving

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A space truss is a three-dimensional counterpart of a planar truss. These structures consist of members connected at their ends, often utilizing ball-and-socket joints to create a stable and versatile framework. Due to its adaptability and capacity to withstand complex loads, the space truss is widely used in various construction projects.
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Transfer Function to State Space01:23

Transfer Function to State Space

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State-space representation is a powerful tool for simulating physical systems on digital computers, necessitating the conversion of the transfer function into state-space form. Consider an nth-order linear differential equation with constant coefficients, like those encountered in an RLC circuit. The state variables are selected as the output and its n−1 derivatives. Differentiating these variables and substituting them back into the original equation produces the state equations.
In an RLC...
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State Space to Transfer Function01:21

State Space to Transfer Function

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The conversion of state-space representation to a transfer function is a fundamental process in system analysis. It provides a method for transitioning from a time-domain description to a frequency-domain representation, which is crucial for simplifying the analysis and design of control systems.
The transformation process begins with the state-space representation, characterized by the state equation and the output equation. These equations are typically represented as:
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Trajectory Data Analyses for Pedestrian Space-time Activity Study
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空間と時間におけるニューロン特異性

Isabel Holguera1, Claude Desplan2,3

  • 1Department of Biology, New York University, New York, NY 10003, USA.

Science (New York, N.Y.)
|October 13, 2018
PubMed
まとめ
この要約は機械生成です。

神経の多様性を理解することは 機能回路の形成の鍵です 転写因子と空間的なシグナルを含む保存された発達プログラムは,単細胞RNAプロファイリングにより,種間のニューロン仕様を導き,新しい洞察を提供します.

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科学分野:

  • 神経科学
  • 発達生物学
  • 遺伝学

背景:

  • 神経の多様性は 機能的な回路の組み立てに不可欠です
  • この多様性を生み出す 開発プログラムを理解することは不可欠です

研究 の 目的:

  • ニューロンの特異性の保存メカニズムを強調する.
  • これらのメカニズムが 異なる神経構造でどのように使われているかを説明する.
  • ニューロンの特異性を特定する.

主な方法:

  • ニューロン特異化における保存された発達原理のレビュー.
  • 転写因子と空間的なヒントの役割を強調する.
  • 単細胞RNAプロファイルの可能性についての議論

主要な成果:

  • 脊椎動物と無脊椎動物に共通する神経特異の発達原理がある.
  • トランスクリプション・ファクターのカスケード タイムリー・パターンの祖先
  • 空間的なシグナルが 時間のパターンを変化させる

結論:

  • ニューロンの特異性は 保存された時間的および空間的なパターンメカニズムに依存しています
  • ニューロンの特異性を完全に理解するにはさらなる研究が必要である.
  • 単細胞RNAプロファイリングは,神経の多様性と発達軌道を特徴づけるのに有望である.