南京林业大学学报（自然科学版）
AN IMPROVED METHOD FOR CALCULATING a AND B OF PROPORTIONAL DAMPING
Wang Quangzhong (Nanjing Forestry University)Chen Guorong
JOURNAL OF NANJING FORESTRY UNIVERSITY . 1993, (04): 88 -91 .  DOI: 10.3969/j.jssn.1000-2006.1993.04.019

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