BDR

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BDR
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  • Eigenranking

    My matrix:[

    [0, 4, 2, 2, 1],

    [1, 0, 4, 4, 1],

    [1, 3, 0, 4, 4],

    [1, 3, 2, 0, 1],

    [2, 1, 4, 1, 0]

    ]


    Team 3: rating = 0.5317387251068555
    Team 2: rating = 0.4743664736534873
    Team 1: rating = 0.43963279846587106
    Team 5: rating = 0.41258201033241837
    Team 4: rating = 0.3587888852214044
    


    Clearly, team 3 has the advantage. However, since this is bling archery, you can never tell who will pull out on top.

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  • Modeling a steady state heat distribution in 2D

    For my conditions, $k=0$ and $f=0$, the steady-state of my polygon is shown below. The temperature in the lower right hand corner $(28.69,0.93)$, is approximately $u=0.92895$.



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  • Modeling 2D Heat Flow

    Per the screenshot above, the temperature near the midpoint of the insulated side of the triangle is approximately 0.04795. See my random questions for more details.

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  • Random heat evolution problem

    A metal bar of length 1 lies along the unit interval. Its temperature distribution is given by

    $g(x) = 4x^2 - 2x$.

    At time t=0, its left end is set to temperature 2 and its right end to 0. Sketch the temperature distribution at times

    t=0, t=0.01, t=0.1, and t=10




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  • Steady state heat flow with source

    Heat flow with a constant internal heat source is governed by:

    $u_t=2u_{xx}+7$, $u(0,t)=−2$, $u(1,t)=4$.

    Because this is a steady state temperature distribution, $u_t=0$ since $u(x,t)$ does not change with time. So,

    $0=2u_{xx}+7$

    Solving for $u_{xx}$ gives $u_{xx}=\frac{-7}{2}$. By integrating this equation twice we get:

    $u(x,t)=\frac{-7}{4}x^2+c_1x+c_2$,


    where $c_1$ and $c_2$ are our two constants. Solving for $c_1$ and $c_2$ using the initial conditions of $u(0,t)=-2$, $u(1,t)=4$ produces the steady state distribution of

    $u(x,t)=\frac{-7}{4}x^2+\frac{3}{2}x+\frac{19}{4}$

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