
Rockbox mail archiveSubject: Re: Power Efficiency TradeoffsRe: Power Efficiency Tradeoffs
From: Mark Allums <mark_at_allums.com>
Date: Mon, 14 Jan 2008 04:36:19 0600
Linus Nielsen Feltzing wrote:
A proportion is usually written in the form
y = kx + c
where k is called the "constant of proportionality".
A "proportionality" can be expressed by almost any function; the
y = F(x) = Px + c
where P is some polynomial in some other variable, with P generally a
e.g.,
P(q) = s^2 + 2s + 3
y = xs^2 + 2xs + 3x + c
If s is close to 1.0 and we can assume it *stays* there, then it becomes
y = x + 2x + 3x + c
y = 6x + c
If it can be represented by an exponential, logarithmic, harmonic or
a = k(b^0.5) + c, where c == 0
And if we *know* the function that approximates the value, we can use
At any rate, we know what you mean when you say "proportional".
:)
Mark Allums
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