摘要
对再生骨料透水混凝土抗压强度、劈拉强度、孔隙率及透水系数的实测数据进行统计分析并检验,结果显示4个性能均基本符合正态分布规律。在此基础上,引入多维正态分布理论构成四维总体随机样本,通过求得其协方差矩阵并无偏估计样本总体的协方差,明确再生骨料透水混凝土各性能之间相关性。同时,利用χ^2统计量的Q-Q图检验法对四维总体随机样本进行正态性检验,得出由再生骨料透水混凝土各性能构成的随机向量服从四维正态分布。
Through the statistical analysis and test of the compressive strength,tensile strength,porosity and permeability coefficient of the recycled aggregate permeable concrete,the results showed that the four properties were basically in accordance with the normal distribution law. On this basis,the introduction of multi-dimensional the normal distribution theory constituted a four-dimensional population random sample. By finding the covariance matrix and estimating the covariance of the sample population,the correlation between the properties of the recycled aggregate permeable concrete was clarified.In addition,the Q-graph test method of χ^2 statistic was used to test the normality of the four-dimensional population random sample.It was considered that the random vector composed of the properties of the regenerated aggregate permeable concrete could well accept the four-dimensional normal distribution.
作者
陈守开
陈家林
符永淇文
张政男
蒋海峰
CHEN Shoukai;CHEN Jialin;FU Yongqiwen;ZHANG Zhengnan;JIANG Haifeng(School of Water Conservancy,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;Henan Key Laboratory of Water Environment Simulation and Treatment,Zhengzhou 450045,China;Water EnvironmentGovernance and Ecological Restoration Academician Workstation of Henan Province,Zhengzhou 450002,China;Collaborative Innovation Center of Water Resources Efficient Utilization and Protection Engineering,Zhengzhou 450045,China)
出处
《人民黄河》
CAS
北大核心
2019年第8期148-152,共5页
Yellow River
基金
国家自然科学青年基金项目(51309101)
国家自然科学基金面上项目(51679092)
河南省重大科技攻关项目(172102210372)
河南省产学研合作项目(182107000031)
关键词
透水混凝土
再生骨料
四维正态分布
协方差矩阵
permeable concrete
recycled aggregate
four-dimensional normal distribution
covariance matrix