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Jiang, Hai,Yao, Jianguo,Zhang, Guanyuan The Korean Institute of Electrical Engineers 2011 The Journal of International Council on Electrical Vol.1 No.4
With regard to distant communication of Subscriber Power Consumption Information Acquisition Systems (SPCIAS), this paper analyzes some distant communication technologies such as private optical fiber network, wireless private network, wireless public network and etc. The rules for choosing the type of communication technologies are also given in various application areas. In the meanwhile, considering that the SPCIASs must adopt various types of distant communication technologies,this paper presents "the Communication Integrated Platform for the SPCIASs"(CIP).
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Stability Analysis of Discrete-Time Piecewise-Linear Systems: A Generating Function Approach
Kai Liu,Jianghai Hu,Yu Yao,Baoqing Yang,Xin Huo 제어·로봇·시스템학회 2014 International Journal of Control, Automation, and Vol.12 No.5
This paper studies the exponential stability of a class of discrete-time piecewise-linear systems (DPLS). Some basic properties of the proposed DPLS are established, which enables the generating function approach to be used for the system stability analysis. By introducing the generating functions of DPLS and showing their properties, a sufficient and necessary condition for the exponential stability of DPLS is derived. Furthermore, the maximum exponential growth rate of system trajectories can be obtained exactly by computing the radii of convergence of the generating functions. The algorithm for computing the generating functions is developed and two examples are given to demonstrate the proposed approach.
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YongJiang Chen,Jianghai Zhao,Chuangfan Yuan,Jingkai Sun 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.4
An analysis model of the contact characteristics of the double-nut preloaded ball screw which can consider the combined action of the axial load and the overturning moment is established, the model can consider non-uniform load distribution, and the validity of the model is verified by experiments. Based on this model, the influence of the combined action of axial load and overturning moment on the average value and distribution fluctuation value of the contact angle of the ball screw, the number of unloaded balls, the distribution fluctuation value of the contact load, and the static contact stiffness and other contact parameters are systematically analyzed, and get the following conclusions: The contact parameters of the ball screw are mainly affected by the axial load and the contact state between the ball and the raceway. The gradually increasing axial load basically reduces the influence of the overturning moment on the contact parameters of the ball screw. There is a critical value of the load in the axial direction within the range of the action value of the preload load. Only when the critical value is above the critical value, the contact parameters will change regularly with the changes in the axial stiffness and overturning moment. However, different critical values for the regular variation of contact parameters with axial load and overturning moment vary.
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Hydrophobicity test of silicone rubber based on thermogravimetric analysis
Jie Liu,Boyan Jia,Jianghai Geng 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.5
To study the hydrophobicity and the transfer of hydrophobicity of silicone rubber, experiments were conducted under three conditions (low-temperature ashing, room-temperature ashing, and low-temperature salting) on new silicone rubber products. Then the surface hydrophobicity of the material after cleaning the contaminants was measured using the classification of water spray, and the change laws of low molecular-weight substances in the core layer and the surface of silicone rubber samples were studied using the thermogravimetric analysis. The results showed that the low molecular-weight substances, namely the hydrophobic substances, were a typical type of siloxane. After pollutants accumulated on the surface of the silicone rubber, the surface hydrophobicity of the material declined continuously, and the contents of hydrophobic substances in the surface and the core layers reduced with fluctuations at a rate being directly proportional to the ambient temperature. The content and the decrease rate of hydrophobic substances in the surface were slightly higher than those in the core layer. The ashes in the contaminants propelled the transfer of the hydrophobic substances while salts inhibited the transfer. However, the presence of salts accelerated the hydrolysis of silicone rubber molecules in the material surface. The experimental results provide reference for the daily maintenance of composite insulators of electric power enterprises.
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Gao Fuxian,Wang Chunxiao,Ji Jianghai,Li Wenjuan 대한독성 유전단백체 학회 2023 Molecular & cellular toxicology Vol.19 No.3
Background Cervix cancer (CC) is the most common gynecological malignancy and the leading cause of morbidity in women around the world. Objectives In this research, the eff ect of FBXO22 on HPV-associated CC was evaluated. Results The results fi rst illuminated that FBXO22 was highly expressed in HPV + CC patients. FBXO22 knockdown inhibited the proliferation of HPV + CC cells, and promoted autophagy in HPV + CC cells. Finally, FBXO22 regulates the LKB1/ AMPK pathway . Conclusion This research hinted that FBXO22 promotes cell proliferation and inhibits autophagy in HPV-associated CC by inactivating the LKB1/AMPK pathway.
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