Methods : the similarities of honeysuckle chromatography fingerprints were calculated by the methods of correlation coefficients and angle cosine with or without retention time correction and signal standardization 方法:对金银花药材指纹图谱进行保留时间和峰面积校正,分别使用相关系数法和夹角余弦法计算处理前后图谱间相似度。
Secondly , we construct the sequential confidence intervals for the common number characters : coefficient of variation , skewness and kurtosis , stressing on computing their asymptotic variances in their limiting distributions 其次,我们就常用的数字特征变异系数、偏度和峰度分别建立了它们的序贯置信区间程序,着重算出它们极限分布中的相关渐近方差。
The probability density function of net rainfall relative errors , flood peak discharge relative errors and the time error of the forecasted flood peak are calculated by the model developed 通过建立洪水预报误差分布的最大摘模型,计算出9座典型水库洪水预报的净雨相对误差、洪峰流量相对误差和峰现时间预报误差的概率密度函数,并将其概率密度函数曲线与正态分布曲线进行比较。
This thesis mainly focuses on ordivician carbonate strata in northern dagang oilfield , including stratagraphic correlation , every formation ' s lithofaces - paleographical distribution , carbonate diagenesis , reservoir characteristics and its affecting factors , paying close attention to qianmiqiao buried hill . the main results have been achieved as following : 1 . on the basis of many dividing schemes of ordivician strata that have been established since the liberation of nation , we determined another scheme of the studying area : ordivician is divided into three series : lower , middle and upper 主要成果表现在以下几个方面: 1 、在综合分析建国以来众多研究学者对研究区奥陶系地层划分结果的基础上,提出了笔者的划分方案,即将奥陶系三分:下奥陶统为冶里组和亮甲山组,中奥陶统分为下马家沟组、上马家沟组和峰峰组,上奥陶统缺失,并对各组的岩电特征进行了详细论述。
Such as when the substrates was benzidine and a - naphthol , the absortion peak was 450nm after catalyticed by dna , and 501nm after catalyticed by pod , if changing substrate to benzidine and pyrocatechol , the absortion peak was 503nm after catalyticed by dna and 603nm after catalyticed by pod . the second difference was the different result after hplc : the result of hplc ( substrates : benzidine and a - naphthol ) showed that the products under the affect of dna and pod had different value on the peak and the area 然后对以联苯胺与-萘酚为底物,以h _ 2o _ 2为氧化剂,进行高效液相色谱分析,分析结果表明dna与过氧化物酶作用后的产物在峰面积和峰高上有不同数值;同时,不同形式的dna对该反应都有催化活性,表明只要是生物来源的dna (非特异性dna )都具有一定程度的催化活性。
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