摘要
通过对舟山站点2002/2003年度降水中的6种常量阳离子H+、NH4+、K+、Na+、Ca2+、Mg2+近2a的连续观测,采用稳健统计分析对浓度范围及变化趋势进行了描述.利用线性判别分析对实验数据进行降维处理,得到线性判别曲面,对样本点在新正规变量空间的时间性分布特征进行了描述,依据正规变量的线性组合,解释了决定该样本点时间性特征分布的主要阳离子影响因素,并对造成异常样品点的影响因素进行了分析.
Rainwater samples were collected at rain-sampling Spot of Zhoushan in 2002- 2003, Major cation concentrations （H^＋ , NH4^＋ , K^＋, Na ^＋ ,Ca^2 ＋ , Mg^2 ＋ ） of rainwater sample were determined. The concentration variation range and character were depicted by robust statistic analysis. Linear discriminate analysis （LDA） was used to acquire a further knowledge on the annual and seasonal characteristics of research major cations. Distribution character of samples from sample spot was clearly depicted in the new CA1-CA2 ordinates generated by linear discriminate analysis, and the reasons that caused the outliers in samples were discussed.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2006年第10期1992-1997,共6页
Environmental Science
基金
国家重点基础研究发展规划(973)项目(2006CB400601
2001CB409703)
新世纪优秀人才支持计划项目(NCET-05-0593)
关键词
舟山群岛
降水
常量阳离子
稳健统计分析
线性判别分析
Zhoushan Archipelago
rainwater
major cation
robust statistic analysis
linear discriminate analysis （LDA）
