Information portal development and practice at Shanghai Jiao Tong University Library

Jin, Yi; Jia, Peng

doi:10.1108/14684520910969943

Cited by 15 publications

(10 citation statements)

References 23 publications

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“…2.2 we just simply show the frame of the proof, for the detail, one can refer to the author's Ph.D thesis. [15] 2.2 Sketch of Proof of Theorem 2.2…”

Section: Resultsmentioning

confidence: 99%

Global Structure Stability of Riemann Solution of Quasilinear Hyperbolic System of Conservation Law in Presence of Boundary: Shocks and Contact Discontinuities

Cui-lian

2008

Commun. Theor. Phys.

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In this paper, we investigate a class of mixed initial-boundary value problems for a kind of n × n quasilinear hyperbolic systems of conservation laws on the quarter plan. We show that the structure of the piecewise C 1 solution u = u(t, x) of the problem, which can be regarded as a perturbation of the corresponding Riemann problem, is globally similar to that of the solution u = U (x/t) of the corresponding Riemann problem. The piecewise C 1 solution u = u(t, x) to this kind of problems is globally structure-stable if and only if it contains only non-degenerate shocks and contact discontinuities, but no rarefaction waves and other weak discontinuities.

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“…2.2 we just simply show the frame of the proof, for the detail, one can refer to the author's Ph.D thesis. [15] 2.2 Sketch of Proof of Theorem 2.2…”

Section: Resultsmentioning

confidence: 99%

Global Structure Stability of Riemann Solution of Quasilinear Hyperbolic System of Conservation Law in Presence of Boundary: Shocks and Contact Discontinuities

Cui-lian

2008

Commun. Theor. Phys.

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“…Early damage may occur due to material defects, improper processing or assembly, poor lubrication, moisture or foreign body intrusion, corrosion and overload of rolling bearings [3]. Usually, due to improper assembly or improper use of the retention frame deformation, which may increase the friction between the holder and the rolling body, and even make some rolling body stuck and can not roll, or the holder and the internal and external roller friction can cause the retention frame damage, which also makes the vibration, noise and heat increase [4]. Generally, according to the state variables used in the monitoring and diagnosis, the rolling bearing working condition monitoring and fault diagnosis are divided into temperature detection technology, oil sample analysis technology, ferrospectral diagnosis technology, oil film resistance diagnosis technology and vibration detection technology [5]。 Fault feature extraction is generally performed in time, frequency and frequency domain.…”

Section: The Fault Analysis Methods Of Rolling Bearingsmentioning

confidence: 99%

Deep learning based on rolling bearing fault diagnosis method

Liu,

Song

2023

TETR

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With the continuous development of industrial automation, rolling bearings play a crucial role in many fields as key mechanical components, and the fault diagnosis of rolling bearings have great significance. This paper discusses a deep learning based rolling bearing fault diagnosis method, aiming to improve the accuracy and efficiency of fault detection. Firstly, the vibration signals of rolling bearings are pre-processed to extract the feature information that helps fault diagnosis. Then, the features were automatically learned and classified by using BP neural network. Finally, the effectiveness and robustness of the method were verified through experiments. Compared with the traditional fault diagnosis method, the deep learning-based rolling bearing fault diagnosis method has higher accuracy and practicality, which provides strong support for the fault detection and preventive maintenance of rolling bearings.

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“…The development of children's sports activity games is based on physical and psychological development, which not only reflects the achievements of physical and mental development but also is an effective method to promote physical and mental development. Children's sports activity games are the best way for children to express and develop themselves and innovate themselves ( Jin, 2019). It is also an indispensable condition for children to achieve all-round development.…”

Section: Children's Physical Activity and Game Constructionmentioning

confidence: 99%

A Construction of Physical Activity Games to Develop Physical Health of Kindergarten Aged 5-6 Years in Tianhe District, Guangzhou City

Wu,

Siriphan,

Hongsaenyatham

2024

IJSASR

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Background and Aim: Research on children's sports activity and games is an emerging research field in China. Relevant research results show that the development of children's basic physical qualities has not effectively penetrated the field of children's learning. The goal of this study is to establish a set of children's sports activity games, to better promote the healthy growth of children. Materials and Methods: This study adopted the interview method, questionnaire survey method, and children fitness test, through the questionnaire survey of 20 preschool teachers, and 20 kindergarten principals, and the physical health test, established the basic children's sports activity games with 7 experts; interviewed 19 focus group experts, determine the basic sports activity games; after verification by 9 appreciation experts, finally determined the sports activity games. The research process involves organizing the current problems in children's physical education, first establishing children's physical activity games, and then verifying them using focus groups and appreciation groups. The obtained data were processed using EXCELL and SPSS26.0. Results: Established physical activity games for children aged 5-6 years, contains 24 games with 6 qualities. The development of speed quality of the game: paste, eagle catch a chicken, fishing, electricity; The development of sensitive quality of the game is: feet continuous jump, fun to play sheep corner kick, jump bamboo pole, two people three feet; The development of balance quality of the game are: balance beam, everyone together to repair the bridge, single foot standing, play tires; The development of coordinated quality of the game is: standing long jump, bag jump, hopscotch, skipping music; The development of strength quality of the game are: tennis throw far, small bomb, newspaper play more and more, sandbag a thing to play; The development of flexible quality of the game are: sitting body forward bending, flipping pancakes, flipping saw pull big saw, guessing first move. Conclusion: Through the establishment of a children's sports game system, children can develop and improve their sports quality in an all-round way in an interesting and challenging environment. This is of great significance for the practice of preschool physical education and provides a useful reference for future research and practice.

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Information portal development and practice at Shanghai Jiao Tong University Library

Cited by 15 publications

References 23 publications

Global Structure Stability of Riemann Solution of Quasilinear Hyperbolic System of Conservation Law in Presence of Boundary: Shocks and Contact Discontinuities

Global Structure Stability of Riemann Solution of Quasilinear Hyperbolic System of Conservation Law in Presence of Boundary: Shocks and Contact Discontinuities

Deep learning based on rolling bearing fault diagnosis method

A Construction of Physical Activity Games to Develop Physical Health of Kindergarten Aged 5-6 Years in Tianhe District, Guangzhou City

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