Research status and development trend of energy finite element analysis: a review

Xie, Miaoxia; Yao, Feilong; Li, Ling; Li, Yueming

doi:10.21595/jve.2022.22843

Cited by 7 publications

(4 citation statements)

References 50 publications

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“…Through the above analyses, the overall fishery eco-efficiency of the south is higher than that of the north as a whole, and is one of the most dynamic regions for the development of the fishery industry in China [13]. The fishery industry in the south occupies nearly half of the national aquatic products, providing many jobs for the people, increasing financial income, promoting the development of tourism, and making indelible contributions in the push for poverty alleviation.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Measurement of Ecological Fisheries Efficiency in Selected Coastal Cities Based on the NDDF Model

Guo,

Zhao,

Zhao

et al. 2024

wjmst

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With global population growth and economic development, the demand for marine resources is constantly increasing, and fishing activities are facing greater pressure. Overfishing and unreasonable fisheries management have led to some fishery resources facing depletion and ecosystem degradation. The health of marine ecosystems is crucial for the ecological balance of the Earth. Overfishing and ecosystem destruction may lead to ecosystem collapse, causing long-term impacts on many species and ecological functions that rely on marine organisms. With the development of technology and innovation, new fishery technologies and management methods continue to emerge, which have the potential to improve the ecological efficiency of fisheries and optimize resource utilization. Based on the panel data of some coastal selected provinces from 2005 to 2019, the NDDF model is used to calculate the marine fishery efficiency and target the path of marine fishery eco-efficiency improvement. The results of the study show that, in terms of spatial pattern, the eco-efficiency value of marine fisheries in southern coastal provinces and municipalities in China is higher than that in northern coastal provinces and municipalities as a whole. Shandong province has the highest eco-efficiency value in the Bohai Rim region, and Shanghai city has the highest eco-efficiency value in the Yangtze River Delta region. In terms of time series, the eco-efficiency values of marine fisheries in the eastern coastal provinces and municipalities of China showed a fluctuating increase, and two peaks occurred in 2011 and 2019. Provinces and cities with high eco-efficiency values have the common characteristics of enjoying national policy support and reasonable resource allocation, while provinces and cities with lower eco-efficiency values have the common characteristics of irrational industrial structure, weak environmental protection awareness, and less scientific and technolo gical investment. Based on this, suggestions are put forward on improving the eco-efficiency value of marine fisheries: vigorously developing fishery-related science and technology, optimising the industrial structure of coastal cities, and increasing policy support.

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Section: Conclusion and Recommendationsmentioning

confidence: 99%

Measurement of Ecological Fisheries Efficiency in Selected Coastal Cities Based on the NDDF Model

Guo,

Zhao,

Zhao

et al. 2024

wjmst

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show abstract

“…According to the principle of water difference, the electrostatic stalk sorting machine takes advantage of the difference in electrical conductivity and dielectric properties between tea leaves and tea stalks to pick out impurities such as tea stalks. High-voltage electrostatic pedunculating machine is widely used in China and is the leading product of tea pedunculating machine (Xie et al, 2004). With the rapid development of high technology with computer as the core, combining high resolution image recognition and high speed micro jet, photoelectric tea stalk picker has been developed.…”

Section: Introductionmentioning

confidence: 99%

Distinguishing tea stalks of Wuyuan green tea using hyperspectral imaging analysis and Convolutional Neural Network

Yu,

Zhao,

Liu

et al. 2024

J Agric Eng

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Wuyuan green tea is a famous agricultural product in China and a product protected by national geo-graphical indications. The processed green tea also needs to remove impurities, such as stones, tea stalks, etc. However, tea stalks cannot be classified from Wuyuan green tea using photoelectric sorting and 2D image recognition technology since they have similar colors. This paper adopts hyperspectral imaging technology to solve the problem of inaccurate sorting caused by their similar colors. Green tea containing tea stalks was imaged using a visible and near-infrared camera with a wavelength of 400nm-1000nm. What’s more, Principal Component Analysis (PCA) was adopted to reduce the dimension of the col-lected hyperspectral image. And the Convolutional Neural Network (CNN) was used constructively to identify tea stalks in hyperspectral image, the CNN can automatically learn the corresponding features, avoid the complex feature extraction process. The experimental results showed that the recognition accuracy for tea stalks reaches 98.53%. The method has a high recognition rate and can meet the actual production requirements. After field testing, the selection rate is as high as 97.05%.

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“…La comparación de las variables que se deben seleccionar para su uso en simulaciones tiene la importancia de lograr, a futuro, la optimización de los especímenes [9], ya sea para elegir otro material o modificar los diseños en un espécimen de prueba, los investigadores a la fecha trabajan en mejorar la teoría con los softwares de simulación [10], identificando las aplicaciones en ingeniería [11]. Es indudable que el FEM proporciona aproximaciones, por medio de sistemas computacionales, en el análisis de un espécimen o sistema [12], que se pueden comparar con la experimentación o modelos matemáticos para fortalecer la investigación en ingeniería [13].…”

Section: Introductionunclassified

Control del mallado con FEM para caracterizar una junta mecánica en aplicaciones de investigación y prototipaje

González-Sosa,

Ávila-Soler

2024

Rev. Ci. Tec.

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Una de las características clave de los sellos mecánicos es lograr una estanqueidad efectiva entre dos piezas mecánicas para evitar el desplazamiento y las fugas de refrigerante en aplicaciones industriales. Actualmente la mayoría de estos elementos se producen utilizando neopreno, cartón comprimido, papel alquitranado, grafito laminado, por lo que buscamos producirlos utilizando materiales ABS y PLA. Para el diseño se utilizó software CAD con licencia educativa destinada a educadores e investigadores, posteriormente se realiza un análisis de elementos finitos según las especificaciones del producto. En este sentido, se ha identificado la importancia del FEM como herramienta de evaluación en el contexto de esta tendencia de utilizar tecnologías innovadoras para la investigación. Como parte de los resultados, los datos obtenidos permiten seleccionar tanto las variables como las propiedades físicas de la biela y pueden ser utilizados para desarrollar proyectos y estudios de esta naturaleza aplicables en casos de estudio relacionados con la Ingeniería mecánica, mecatrónica, industrial y electrónica. Finalmente, las variables Factor de Seguridad (FS), Von Mises Stress (VM) y YZ Stress, se analizan después de la simulación mediante FEM, proporcionando un rango de valores para su uso en aplicaciones de ingeniería con diferentes técnicas en las que se utilizan bielas, FS [ 0,55, 12,26], VM [1,63, 36,45], YZ [-1,36, 10,13]. En cuanto a los demás resultados presentados en este estudio, el coeficiente de correlación se utiliza como parte estadística con gráficos para evaluar la simulación, la dependencia de variables y parámetros relevantes para el estudio de caso, por lo que se observó una fuerte relación entre las variables; esfuerzo plano, deformación, desplazamiento y el esfuerzo de Von Mises, cuyos valores oscilan entre 0,87 y 0,99, mostrando una fuerte relación entre estas variables y, para las demás, se debe considerar mejorar la relación y aumentar el coeficiente.

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Research status and development trend of energy finite element analysis: a review

Cited by 7 publications

References 50 publications

Measurement of Ecological Fisheries Efficiency in Selected Coastal Cities Based on the NDDF Model

Measurement of Ecological Fisheries Efficiency in Selected Coastal Cities Based on the NDDF Model

Distinguishing tea stalks of Wuyuan green tea using hyperspectral imaging analysis and Convolutional Neural Network

Control del mallado con FEM para caracterizar una junta mecánica en aplicaciones de investigación y prototipaje

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