摘要
本文基本同意赵建新对人文作用定量分析模型的评述,并补充两点:一是证明α、β近似公式不成立;二是指出P.W.Y等值均是时段累积值或平均值,不具有时间连续性,从一个时段到另一十时段是突变的,这就不满足微分或差分所要求的微小变化的条件,因而用任两个时段的值代入差分方程进行计算是没有根据的,所以计算结果令人怀疑。
The Author agrees with zhao Jiangxing that the quantitative analysis model of human, action promoted by Xu Jianghua etal. lacks some conditions, and has given furthamore evidence to prove that that model iS not correct generally. All these variables such as sediment—yield, precipiation, et, are accumulative or averased value in a period, for example, a year. They are not continuous as the time goes on. Because differential equation needs that its vaviables are continuous, these variables can't be used in differential equations. The (?) analysis modelt of human action before said has used these accumalative or averaged valor on differrential equations, so it's not correct unless those equations are linear.
出处
《干旱区地理》
CSCD
北大核心
1993年第3期86-89,共4页
Arid Land Geography
