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6th April 2005 12:25 #1: , . , , , . , ? : t M(t). , , , dM(t)/dt = M'(t) = -k*M(t). , . : M(t) = M(0)*exp(-k*t). S, M(0) = S. k, ^(-1) , t_h. t_h , M(t_h) = S/2 = S*exp(-k*t_h), k*t_h = ln 2, , k = (ln 2)/t_h. : M(t) = S*exp(-(ln 2)*t/t_h) = S*2^(-t/t_h). . " 2 ", .. 2 . t_p : 2 = S*2^(-t_p/t_h) t_p = t_h*lb(S/2) = t_h*(lb(S) - 1), lb 2 ( . - ) , t_h , . 500 8 , 1/8. : - , , -
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6th April 2005 12:37 #2
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6th April 2005 14:49 #3
: XaMaB; . 0.42
In God we Trust (all others must submit a X.509 certificate). , ()
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6th April 2005 15:46 #4
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6th April 2005 16:10 #5
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6th April 2005 16:24 #6Registered User
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