机构地区: 湛江海洋大学农学院
出 处: 《甘肃农业大学学报》 1998年第2期158-161,143,共5页
摘 要: 通过对线截抽样中样本间两两同时出现的概率进行研究,解决树木间的协方差问题。 This paper discussed the probability and conducted the covariance of the sampled trees together with the line intersect sampling. The total number by single sampling lined with line intersect sampling can be estimated.