摘要
在对黑龙江省林区春季防火期（３～６月）森林火险气候进行区划的基础上，进一步探讨了森林火险气候区划的最佳方法．首次采用主成分因子分析法使因子选择客观化，采用系统聚类方法完成了全省森林火险区划，并讨论了系统聚类方法中各聚类方法的优缺点，选出最佳方法──离差平方和法．
On the basis of zonal division of the forest-fire-danger climate in Heilongjiang province during the spring fire-prevention period(from Mareh to June),a futher study was under taken to optimize the method for xonal division of the forcst一fire-danger climate. The principal factor analysis was adopted for the first time,to make the selection of factors casier and more praetieable.The whole province zonal division of forest fire-danger was comp'leted bymeans of Hierachlcal Cluster Analysis.Through comparison of the strong and weak pointsamong the six methods of Hieraelled Cluster Analysis,thesquare Sum of dispersion was found to be the optimam for this purpose.
出处
《东北农业大学学报》
CAS
CSCD
1995年第2期145-150,共6页
Journal of Northeast Agricultural University
关键词
森林火险
气候指标
区划方法
黑龙江
Heilongjiang province
forest-fire danger
climatic indices
zonal division
