摘要
选择不同地区水田土壤进行试验，应用分形和分维理论，计算土壤强度的分维，表明水田土壤强度变化曲线是一种无规分形曲线，提出用折线法反映１ｎＰＳＤ的曲线趋势及折点频率的概念。
Spatial variation of paddy soil strength can be studied by means of the fractal theory.The tests were done in five districts of Jiangsu Province. Cone indices and depths of soilswere recorded with penetrometer at 10 cm intervals.The fractal dimensions were calculatedby both semivariograms and PSD-frequency curves.The CI-distance curves are irregular andselfsimilarity exists in non-scaling intervals.The brokenline method is suggested to thecurved trend of lnPSD. The values of calculated fractal dimensions were 1.88～1.98,verydose to 2.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
1995年第2期10-15,共6页
Transactions of the Chinese Society for Agricultural Machinery
关键词
土壤
土壤力学
强度
分维
江苏
Soil,Soil-mechanics,Strength,Fractal dimension
