- 采样方差
- 采样离散
- 样本方差；样本变异数
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sample variance中文什么意思
例句与用法
- And then , adopting the same model , cyclic moment estimation statistic of different orders are constructed respectively , large sample variance expressions of the estimator through theoretic analysis are derived , as well as the constraint relation of estimator performance and noise statistical characteristic . the curve of estimation performance is obtained through monte carlo simulation test , which proves the related conclusion derived
然后，论文同样以加性和乘性噪声联合干扰下的复谐波信号和复线性调频信号为观测模型，分别构造了基于不同阶次的循环矩估计量，从理论上推导出了估计量的大样本方差表达式，分析了估计量性能与噪声统计特性的约束关系，通过monte - carlo仿真试验得到了估计性能的曲线，验证了推导的有关结论。 - In chapter 3 we analyze a useful statistical method - projection pursuit ( pp ) , including its basic theory and application . we put out definitions of projection index and projection pursuit , then prove that pca is a special case of pp with sample variance as projection index and list some indices often used . in section 3 . 3 we apply pp with information divergence index to hyperspectral image , and demonstrate the advanced ability of it by the comparison between it and pca
第三章围绕一种新兴的统计降维方法? ?投影寻踪展开讨论，概述投影寻踪的一般理论，定义了投影指标和投影寻踪的概念，证明了传统的主成分分析方法是投影寻踪的一个特例，证明了正态性与friedman指标为0的等价性；第三节针对高光谱图像处理问题，从实例和理论两个方面，论证了以信息散度为指标的投影寻踪方法在提取信息的能力上优于以方差大小作为衡量信息量多少标准的主成分分析方法。