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Joints, also known as articulations, are classified based on their structural characteristics, i.e., based on whether the articulating surfaces of the adjacent bones are directly connected by fibrous connective tissue or cartilage, or whether the articulating surfaces contact each other within a fluid-filled joint cavity. These differences serve to divide the joints of the body into three structural classifications.
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Divergence and Stokes' Theorems01:06

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The divergence and Stokes' theorems are a variation of Green's theorem in a higher dimension. They are also a generalization of the fundamental theorem of calculus. The divergence theorem and Stokes' theorem are in a way similar to each other; The divergence theorem relates to the dot product of a vector, while Stokes' theorem relates to the curl of a vector. Many applications in physics and engineering make use of the divergence and Stokes' theorems, enabling us to write...
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Poisson's And Laplace's Equation01:25

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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.
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Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
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Mohr's Circle for Plane Strain01:18

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Mohr's circle is a crucial graphical method used to analyze plane strain by plotting strain on a set of cartesian coordinates, where the abscissa is normal strain ∈ and the ordinate is shear strain γ. Similarly to Mohr’s circle for plane stress, two points X and Y are plotted. Their coordinates are (∈x, -γXY) and (∈Y, γXY), respectively.
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The distribution law or Nernst's distribution law is the law that governs the distribution of a solute between two immiscible solvents. This law, also known as the partition law, states that if a solute is added to the mixture of two immiscible solvents at a constant temperature, the solute is distributed between the two solvents in such a way that the ratio of solute concentrations in the solvents remains constant at equilibrium.
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Polinomio Jones de escala múltiple y polinomio Jones persistente para el análisis de datos de nudos

Ruzhi Song1,2, Fengling Li1, Jie Wu3,2

  • 1School of Mathematical Sciences, Dalian University of Technology, Dalian 116024, Liaoning, China.

AIMS mathematics
|August 21, 2025
PubMed
Resumen

Este estudio introduce modelos de teoría de nudos localizados, los polinomios de Jones multiescala y persistentes, para analizar el entrelazamiento de curvas. Estos robustos modelos capturan detalles estructurales locales cruciales para las propiedades de los materiales y las aplicaciones del mundo real.

Palabras clave:
57K10 y92C10 Las demás sustanciasEl polinomio de JonesAnálisis de los datos de la curvaanálisis de los datos de los nudoslocalizaciónFlexibilidad de las proteínasEstabilidad

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Área de la Ciencia:

  • * Aplicaciones interdisciplinarias que abarcan las ciencias, la ingeniería y el arte.
  • * Utiliza conceptos de la teoría de nudos para el análisis de curvas 3D.

Sus antecedentes:

  • * El entrelazamiento de curvas es vital para la funcionalidad y las propiedades físicas del material.
  • * La teoría clásica de los nudos carece de información estructural local crítica para usos prácticos.

Objetivo del estudio:

  • * Desarrollar modelos localizados para el análisis del entrelazamiento de curvas en el espacio 3.
  • * Abordar las limitaciones de la teoría clásica de los nudos incorporando detalles estructurales locales.

Principales métodos:

  • * Propuso dos modelos localizados: el polinomio Jones de escala múltiple y el polinomio Jones persistente.
  • * Analizó la estabilidad y la robustez de estos nuevos modelos.

Principales resultados:

  • * Desarrolló modelos polinómicos localizados de Jones que capturan las características de la curva local.
  • * Estabilidad demostrada del modelo y insensibilidad a perturbaciones menores en los datos de la curva.

Conclusiones:

  • * Los polinomios multiescala y persistentes de Jones ofrecen herramientas robustas para analizar el entrelazamiento de curvas complejas.
  • * Estos modelos localizados mejoran la aplicabilidad práctica de la teoría de nudos en escenarios del mundo real.