摘要
根据ASTM D4761-96,对3个尺寸(mm:40×65×4 000、40×90×4 000、40×140×4 000)、2个等级(Ⅰc、Ⅲc)兴安落叶松规格材的抗压强度进行了测试,选取正态分布、对数分布、威布尔分布与数据进行拟合,采用极大似然法估计3种分布的参数,并利用柯尔莫哥洛夫K-S检验对3种概率分布类型进行拟合优度检验。
The ultra compression strength of larch （Larix gmelini） dimension lumber （40mm × 65mm × 4000mm, 40mm × 90mm × 4000mm and 40mm × 140mm × 4000mm, Ic and IIIc grade） were tested by using the method of America Society for Testing and Materials （ASTM） D4761 -96. Normal distribution, log- normal distribution and Weibull distribution were selected for fitting the experimental data. Using the maximum likelihood method to estimate the parameters of three kinds of distribution, kolmogorov test was used to test goodness of fit of three kinds of distribution.
出处
《林业科技》
2013年第4期41-44,共4页
Forestry Science & Technology
关键词
规格材
抗压强度
概率分布
拟合优度
Dimension lumber
Ultra compression strength
Probability distribution
Goodness of fit
