摘要
回顾抽样技术在我国森林资源二类调查中的发展应用,介绍事后分层抽样技术的应用场合、抽样方法及理论基础.认为事后分层抽样理论完善、操作简便,在总体信息掌握不全的情况下应用,既可提高抽样精度,又可降低调查成本.以2005年砚山县森林资源二类调查中抽取的1 293个角规控制检尺样地的样本数据为例,以事后分层抽样与系统抽样作比较,抽样精度明显提高.
The paper reviews the developmental application of sampling skills to the inventory of forest resources＇ planning and design in our country, and introduces application occasion, sampling methods and theoretical basis of afterwards stratified sampling technique. It concerns that the theory of afterwards stratified sampling technique is perfect and operation is simple. Its application can both improve sampling precision and lower expense for the inventory under the circumstance of not enough of general information. Taking the sampling data selected from the inventory of forest resources＇ planning and design in Yanshan county in 2005 as an example, the comparison between afterwards stratified sampling and systematic sampling reveals that sampling precision is obviously improved.
出处
《林业调查规划》
2008年第3期19-22,共4页
Forest Inventory and Planning
关键词
事后分层抽样
系统抽样
精度
森林资源二类调查
总体蓄积量
砚山县
afterwards stratified sampling
systematic sampling
precision
inventory of forest re-sources＇ planning and design
general stock volume
Yanshan county
