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xzczd
  • Member for 9 years
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  • China
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Feel free to correct the grammar mistakes and unidiomatic expressions in my posts.

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15
How to measure the goodness-of-fit of a nonlinear model? Is $R^2$ useful?
Dec 6, 2015
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70
Dynamic Euler–Bernoulli beam equation
66
Analogue for Maple's dchange - change of variables in differential expressions
63
Is manual adjustment of AccuracyGoal and PrecisionGoal useless?
37
Insert $+$, $-$, $\times$, $/$, $($, $)$ into $123456789$ to make it equal to $100$
36
How to compile effectively?