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影泉

金虫 (小有名气)

[求助] 关于单指数衰减模型中平衡时间的计算

单指数衰减模型:
Xt = Xe + (X0 - Xe) exp(-kt)
where Xt is the concentration of  TOC at time t after the conversion of land use, Xe is the concentration at equilibrium, X0 is the initial concentration, and is the rate constant. Kinetic parameters of the model were calculated using the mean of the pasture sites as an initial value.
已知Xe=23.34, k = 0.09, X0 = 95.3,
我想请问各位平衡时间t 怎么计算呀?
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影泉

金虫 (小有名气)

没有缺条件呀,就是这些条件,我也是想不明白这点呀
3楼2012-03-14 16:25:19
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wenjing120(金币+1): 积极应助!华哥V5 2012-03-14 14:06:59
平衡时间t??
岂不是Xt=Xe?
这样一来的话(X0 - Xe) exp(-kt)=0
从而使exp(-kt)=0
得出t趋近无穷大

是不是还差条件啊?
外行飘过~~
2楼2012-03-14 14:06:35
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