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Classification of Systems-II01:31

Classification of Systems-II

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Continuous-time systems have continuous input and output signals, with time measured continuously. These systems are generally defined by differential or algebraic equations. For instance, in an RC circuit, the relationship between input and output voltage is expressed through a differential equation derived from Ohm's law and the capacitor relation,
240
Classification of Systems-I01:26

Classification of Systems-I

293
Linearity is a system property characterized by a direct input-output relationship, combining homogeneity and additivity.
Homogeneity dictates that if an input x(t) is multiplied by a constant c, the output y(t) is multiplied by the same constant. Mathematically, this is expressed as:
293
Aggregates Classification01:29

Aggregates Classification

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Aggregate classification is generally based on its size, petrographic characteristics, weight, and source. Size classification ranges from coarse to fine aggregates, defined by the size of the particles. Coarse aggregates are particles that do not pass through ASTM sieve No. 4, and aggregates that pass through the sieve are fine aggregates.
Petrographic classification groups aggregates based on common mineralogical characteristics. Some of the common mineral groups found in aggregates are...
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Methods of Classification and Identification01:28

Methods of Classification and Identification

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Bacterial identification relies on a diverse array of techniques to classify and understand microorganisms, each tailored to uncover specific characteristics. Traditional morphological approaches, while still valuable, are limited for closely related or structurally simple organisms. Modern methods integrate biochemical, serological, genetic, and advanced molecular tools to achieve greater accuracy.Morphological and Biochemical TechniquesMorphological characteristics, such as cell shape and...
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Classification of Signals01:30

Classification of Signals

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In signal processing, signals are classified based on various characteristics: continuous-time versus discrete-time, periodic versus aperiodic, analog versus digital, and causal versus noncausal. Each category highlights distinct properties crucial for understanding and manipulating signals.
A continuous-time signal holds a value at every instant in time, representing information seamlessly. In contrast, a discrete-time signal holds values only at specific moments, often denoted as x(n), where...
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Moisture Content and Bulking of Aggregate01:10

Moisture Content and Bulking of Aggregate

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The moisture content of aggregates is a crucial factor in construction, particularly in concrete mixing, as it influences the total water required in the mix. Moisture content represents the water coated on the exterior surface of the aggregate existing in a saturated and surface-dry condition. The total water content of a moist aggregate is the sum of its moisture content and water absorption.
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Updated: Sep 8, 2025

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Un modelo de clasificación de madurez para los jujubes de invierno basado en DSAF-ResNet

Yufei Song1,2,3, Aoran Liu4,5, Xi Meng3

  • 1College of Horticulture, Hebei Agricultural University, Baoding, China.

NPJ science of food
|August 25, 2025
PubMed
Resumen
Este resumen es generado por máquina.

La clasificación precisa de la madurez de los jujubes de invierno se logra utilizando una nueva red residual de fusión de atención de doble corriente (DSAF-ResNet). Este método combina datos hiperespectrales y de textura para mejorar la recolección inteligente y el control de calidad en la agricultura.

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Área de la Ciencia:

  • Ingeniería agrícola
  • Visión por computadora
  • Aprendizaje automático

Sus antecedentes:

  • La clasificación precisa y no destructiva de la madurez de los jujubes de invierno es esencial para optimizar el momento de la cosecha y garantizar la calidad de los frutos.
  • Los métodos actuales a menudo carecen de la precisión necesaria para diferenciar las etapas sutiles de madurez, lo que afecta a los procesos posteriores a la cosecha.

Objetivo del estudio:

  • Desarrollar y evaluar un nuevo modelo de aprendizaje profundo para una clasificación precisa y no destructiva de la madurez de los jujubes de invierno.
  • Investigar la eficacia de la fusión de características hiperespectrales y de textura para mejorar la evaluación de la madurez.

Principales métodos:

  • Se propuso una red residual de atención fusionada de doble corriente (DSAF-ResNet), que integraba imágenes hiperespectrales y características de textura de la Matriz de Coocurrencia de Nivel Gris (GLCM).
  • La red incorporó los mecanismos de atención RepVGGBlock y SimAM dentro de una arquitectura de doble flujo.
  • El rendimiento del modelo se validó utilizando métricas de precisión, precisión y recuerdo de prueba.

Principales resultados:

  • El enfoque multimodal fusionado mejoró significativamente el rendimiento de la clasificación en comparación con los insumos de una sola modalidad.
  • El DSAF-ResNet logró una alta precisión de prueba (97,24%), precisión (97,31%) y recuerdo (97,24%).
  • Los estudios de ablación confirmaron la eficacia de los componentes individuales de la red y de la estrategia de fusión.

Conclusiones:

  • DSAF-ResNet ofrece un marco eficaz y escalable para la clasificación no destructiva de la madurez de las frutas.
  • Este enfoque mejora las prácticas agrícolas inteligentes y apoya la agricultura de precisión al permitir una evaluación sólida de la madurez.
  • El modelo demuestra una excelente generalización y estabilidad, incluso con conjuntos de datos desequilibrados.