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Per-Unit Sequence Models01:26

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An ideal Y-Y transformer, grounded through neutral impedances, displays per-unit sequence networks akin to those of a single-phase ideal transformer when subjected to balanced positive- or negative-sequence currents. These currents do not produce neutral currents, and their associated voltage drops.
Zero-sequence currents, which are identical in magnitude and phase, generate a neutral current, resulting in voltage drops across the neutral impedance and the low-voltage winding. If the...
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A Y-connected synchronous generator, grounded through a neutral impedance, is designed to produce balanced internal phase voltages with only positive-sequence components. The generator's sequence networks include a source voltage that is exclusively in the positive-sequence network. The sequence components of line-to-ground voltages at the generator terminals illustrate this configuration.
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This lesson introduces two critical methods in pharmacokinetics, the Wagner-Nelson and Loo-Riegelman methods, used for estimating the absorption rate constant (ka) for drugs administered via non-intravenous routes. The Wagner-Nelson method relates ka to the plasma concentration derived from the slope of a semilog percent unabsorbed time plot. However, it is limited to drugs with one-compartment kinetics and can be impacted by factors like gastrointestinal motility or enzymatic degradation.
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Cognitive learning is based on purposive behavior, incidental learning, and insight learning.
E. C. Tolman's theory of purposive behavior emphasizes that much behavior is goal-directed. He argued that to understand behavior, we must look at the entire sequence of actions leading to a goal. For instance, high school students study hard, not just due to past reinforcement but also to achieve the goal of getting into a good college.
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Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
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Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
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Updated: Sep 9, 2025

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Identificación de secuencias de variables latentes para modelos cognitivos con estimadores de redes neuronales

Ti-Fen Pan1, Jing-Jing Li2, Bill Thompson3

  • 1Department of Psychology, University of California, Berkeley, USA. tfpan@berkeley.edu.

Behavior research methods
|August 28, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Este estudio introduce un nuevo enfoque basado en la simulación utilizando redes neuronales recurrentes para extraer variables latentes dinámicas de modelos cognitivos, incluso aquellos con probabilidades complejas e intratables, avanzando en la investigación de procesos cognitivos.

Palabras clave:
Redes neuronales artificialesModelos cognitivos computacionalesProbabilidad de retracciónLas variables latentes

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Área de la Ciencia:

  • Ciencias cognitivas
  • Neurociencia computacional
  • Aprendizaje automático

Sus antecedentes:

  • La extracción de variables latentes que varían en el tiempo es crucial para comprender los procesos cognitivos dinámicos.
  • Los métodos actuales se limitan a modelos cognitivos específicos, excluyendo aquellos con probabilidades intratables.

Objetivo del estudio:

  • Desarrollar un enfoque basado en la simulación utilizando redes neuronales recurrentes (RNN) para inferir secuencias variables latentes.
  • Superar las limitaciones de los métodos existentes para modelos cognitivos con probabilidades intratables.
  • Para permitir una exploración más amplia de los modelos cognitivos computacionales.

Principales métodos:

  • Un enfoque basado en la simulación que aprovecha las redes neuronales recurrentes (RNNs).
  • Mapeo de los datos experimentales directamente al espacio de las variables latentes.
  • Utilización de datos simulados para la formación y la validación.

Principales resultados:

  • Lograr un rendimiento competitivo en la inferencia de secuencias de variables latentes tanto para modelos de probabilidad como para modelos intratables en simulaciones.
  • Aplicabilidad demostrada en conjuntos de datos del mundo real.
  • El enfoque es práctico para datos individuales, generalizable y adaptable a espacios latentes continuos / discretos.

Conclusiones:

  • El método propuesto amplía la gama de modelos cognitivos que los investigadores pueden analizar.
  • Facilita la prueba de una gama más amplia de teorías cognitivas al permitir la inferencia en modelos complejos.
  • Combina RNN y datos simulados para una extracción robusta de variables latentes.