农业机械学报2001，Vol.32Issue(3)：40-43,4.
精密播种粒距的概率分布
Probability Distribution of Seed Spacing of Precision Drilling
王玉顺 1司慧萍 2郑德聪 3吴海平3
作者信息
- 1. 山西农业大学农业工程系副教授,
- 2. 浙江大学农业生物环境工程研究所博士生,
- 3. 山西农业大学农业工程系副教授
- 折叠
摘要
Abstract
The placement formula was deduced from the seed placement coordinate which was expressed as the sum of expectation value and normal stochastic error based on the observation of the seed spacing forming process in precision drilling. On this basis, a mathematical model was set up, from which the probability density function, probability distribution function, and first as well as second order moments of the seed spacing were obtained. The result show that the seed spacing is a stochastic variable conforming to a deductive distribution of several normal distributions with the same variance but different mean value, and it can be regarded as the folding tail and addition of normal distributions with different distribution parameters. The results of goodness-of-fit test proved that the deduced seed spacing distribution coincided with various practical seed spacing samples. The graph of the spacing probability density whose shape relies on the distribution parameters usually takes the form of “multi-peak and non-symmetry”.关键词
精密播种机/粒距/概率分布/数学模型分类
农业科技引用本文复制引用
王玉顺,司慧萍,郑德聪,吴海平..精密播种粒距的概率分布[J].农业机械学报,2001,32(3):40-43,4.
