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      저자 : ( Huanan Yu ) (검색결과 2 건)
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      • KCI등재

        Dynamic Synchronous Phasor Measurement Algorithm Based on Compressed Sensing

        ( Huanan Yu ),( Yongxin Li ),( Yao Du ) 한국인터넷정보학회 2020 KSII Transactions on Internet and Information Syst Vol.14 No.1

        The synchronous phasor measurement algorithm is the core content of the phasor measurement unit. This manuscript proposes a dynamic synchronous phasor measurement algorithm based on compressed sensing theory. First, a dynamic signal model based on the Taylor series was established. The dynamic power signal was preprocessed using a least mean square error adaptive filter to eliminate interference from noise and harmonic components. A Chirplet overcomplete dictionary was then designed to realize a sparse representation. A reduction of the signal dimension was next achieved using a Gaussian observation matrix. Finally, the improved orthogonal matching pursuit algorithm was used to realize the sparse decomposition of the signal to be detected, the amplitude and phase of the original power signal were estimated according to the best matching atomic parameters, and the total vector error index was used for an error evaluation. Chroma 61511 was used for the output of various signals, the simulation results of which show that the proposed algorithm cannot only effectively filter out interference signals, it also achieves a better dynamic response performance and stability compared with a traditional DFT algorithm and the improved DFT synchronous phasor measurement algorithm, and the phasor measurement accuracy of the signal is greatly improved. In practical applications, the hardware costs of the system can be further reduced.

      • KCI등재

        CULTIVATION OF STUDENTS’ CORE LITERACY BASED ON THE MATHEMATICAL CULTURE PERSPECTIVE

        Hua Nan,Shan Tong,Yu Xu 영남수학회 2019 East Asian mathematical journal Vol.35 No.2

        In recent years, the term core literacy has been popular in educational circles all over the world, and there are more and more research on core literacy . At the same time, the mathematical culture has also been highly valued on a global scale. The mathematical culture is a part of college students’ cultural quality, and then, what is the connection between the mathematical culture and mathematical core literacy? How to improve the mathematical core literacy of contemporary college students? This paper gives the corresponding answers to these two questions. By illustrating the concrete implementation of the course ′′Mathematical Culture′′ offered by Yanbian University, this paper discusses various mea- sures for cultivating students’ core qualities in Chinese universities. It must be useful and promote the research on mathematical core literacy for the educators in various countries.

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