Citation: | Ma Yuan. Some Characteristics of the Slowly Varying Sources Producing Proton Events During Cycle 21[J]. Publications of the Yunnan Observatory, 1984, (1): 55-60. |
[1] | Lu Yangping, Le Guiming, Zhao Haofeng, Yin Zhiqiang. The Relationship between First X-Class Flare, First High Latitude Sunspot Hemisphere Features and the Asymmetry of Solar Activity during Solar Cycle 21-24 [J]. Astronomical Research and Technology, 2016, 13(2): 150-152. |
[2] | Zhang Fan, Ji Shuchcn, Ma Yuan, Yang Rongbang. The Analyses of the Accuracy of Solar Radio Observations at Yunnan Observatory During the Peak Years of Cycle 21 [J]. Publications of the Yunnan Observatory, 1989, 0(1): 18-20. |
[3] | Zhang Fan, Ji Shuchen, Ma Yuan. The Analyses of the Accuracy of Solar Radio Observation at Manila of the USAF During the Peak Years of Cycle 21 [J]. Publications of the Yunnan Observatory, 1989, 0(1): 13-17. |
[4] | Li Kejian, Li Qiongying, Li Zhi, Liao Kunzhen, Li Suchuan, Wu Sheng. Statistical Analysis and Configuration Classification of the Magnetic Fields of the Active Prominences on the Solar Limb During Cycle 21 [J]. Publications of the Yunnan Observatory, 1988, 0(1): 11-20. |
[5] | Zhang Qin. A Prediction of the Major Proton Event for the First Time in Cycle 22 [J]. Publications of the Yunnan Observatory, 1987, 0(2): 31-33. |
[6] | Ding you-ji. Some Observatonal Subjects Which Could Be Selcted in SMY of Cycle 21 [J]. Publications of the Yunnan Observatory, 1982, 0(2): 71-74. |
[7] | Ji Shuchen, Xie Ruixiang, Ma Yuan, Yang Rongbang. The Solar Radio Patrol Network of USAF and the Examination of Prediction Accuracy of the U-Shaped Radio Spectrum for Cycle 21 [J]. Publications of the Yunnan Observatory, 1982, 0(2): 67-70. |
[8] | Luo Baorong, Ma Yuan. Characteristics of the Solar Microwave Bursts With Proton Events [J]. Publications of the Yunnan Observatory, 1982, 0(2): 60-66. |
[9] | Bian Yulin, Tang Baisheng, Shi Zhongxian. The Maximum Entropy Spectral Analysis of Solar Proton Events of Cycle XX [J]. Publications of the Yunnan Observatory, 1981, 0(S1): 154-154. |
[10] | Observatory of Beijing Planetarium. The Sunspot Activity During SMY [J]. Publications of the Yunnan Observatory, 1981, 0(S1): 151-153. |