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02:57Real Time RT-PCR
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Real-time reverse transcription-polymerase chain reaction, or Real-time RT-PCR, is an analytical tool used to determine the expression level of target genes. The method involves converting mRNA to complementary DNA with the help of an enzyme known as reverse transcriptase, followed by the PCR amplification of the cDNA. These two processes can be performed simultaneously in a single tube or separately as a two-step reaction.
The real-time quantification of the number of amplified products is...
The real-time quantification of the number of amplified products is...
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02:12Short-distance Transport of Resources
17.6K
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
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01:13Location and Orientation of the Heart
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The human heart, despite its modest size and weight, is an organ of remarkable strength and endurance. Roughly the size of a fist, the heart weighs between 250 and 350 grams and is nestled within the mediastinum, the medial cavity of the thorax. It extends obliquely for about 12 to 14 cm, resting on the superior surface of the diaphragm. The heart is positioned anterior to the vertebral column and posterior to the sternum, with two-thirds of its mass lying to the left of the midsternal line.
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01:18Methods of Documentation I: Source-Oriented Records
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Source-oriented records, or SOR, are medical record-keeping organized by the data source. The SOR system was first developed in the mid-1900s to organize the growing patient data in hospitals and other healthcare facilities.
In an SOR, each discipline involved in patient care maintains a separate medical record section. This record-keeping method enables easy tracking of patient progress and ensures healthcare staff have access to up-to-date information.
Key Attributes include the following:
In an SOR, each discipline involved in patient care maintains a separate medical record section. This record-keeping method enables easy tracking of patient progress and ensures healthcare staff have access to up-to-date information.
Key Attributes include the following:
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02:03Xylem and Transpiration-driven Transport of Resources
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The xylem of vascular plants distributes water and dissolved minerals that are taken up by the roots to the rest of the plant. The cells that transport xylem sap are dead upon maturity, and the movement of xylem sap is a passive process.
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01:27Real Number System
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The real number system includes all numbers used for counting, measuring, and comparing quantities. Natural numbers are the basic counting numbers: 1, 2, 3, and so on. Integers expand this set by including zero and negative whole numbers: ..., –3, –2, –1, 0, 1, 2, .... Rational numbers are those that can be expressed as the ratio of two integers m/n, where n≠0. This includes fractions like 1/2, integers such as 46, and decimals that terminate, such as 0.17, or...
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Marco de Agarre en Tiempo Real Orientado a Objetivos para Robots con Recursos Limitados
Dongxiao Han1, Haorong Li1, Yuwen Li1
1Shanghai Key Laboratory of Intelligent Manufacturing and Robotics, School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 201900, China.
Sensors (Basel, Switzerland)
|January 28, 2026
Resumen
Este estudio presenta un marco eficiente para la sujeción en tiempo real orientada a objetivos en robots con potencia de cálculo limitada. El sistema logra altas tasas de éxito en varios escenarios, permitiendo aplicaciones de robots móviles.
Palabras clave:
marco eficientecorrección de agarre basada en geometríaplataformas con recursos limitadospoda estructuradaagarre orientado a objetivosMás Videos Relacionados
Área de la Ciencia:
- Robótica y Automatización; Visión por Computadora; Inteligencia Artificial
Sus antecedentes:
- La sujeción orientada a objetivos es crucial para robots domésticos e industriales.; El despliegue de sistemas de sujeción en robots móviles es un desafío debido a las restricciones computacionales.
Objetivo del estudio:
- Desarrollar un marco eficiente para la sujeción en tiempo real orientada a objetivos en plataformas con recursos limitados.; Soportar tanto la sujeción basada en clics para objetos desconocidos como la sujeción basada en categorías para objetos conocidos.
Principales métodos:
- YOLOv8 comprimido para reducir la complejidad del modelo y mantener la precisión de la detección.; GR-ConvNetv2 para la generación de poses de agarre, refinado por máscaras de MobileSAMv2.; Un módulo de corrección basado en geometría para mejorar la precisión de la pose de agarre.
Principales resultados:
- Se logró un 98.8% de éxito en la sujeción en el conjunto de datos de Cornell y un 95.8% en el conjunto de datos de Jacquard.; Se demostró más del 90% de éxito en escenarios del mundo real con objetos desordenados y de un solo objeto.; Rendimiento en tiempo real: 67 ms (basado en clics) y 75 ms (basado en categorías) por fotograma.
Conclusiones:
- El marco propuesto ofrece alta precisión de agarre y rendimiento robusto.; El diseño eficiente permite su implementación en robots móviles y con recursos limitados.