Recent content by volican

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    Does the speed of sound change in metal when heated?

    I'm thinking it does because the density would be different.
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    Does the speed of sound change in metal when heated?

    Is the speed of sound different through the same piece of metal when it is heated compared to when at ambient temperature?
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    A Reducing computation for large power sets

    Yes it is for all unique combinations - so ABC is included - otherwise the number of combinations wouldn’t be so large. It is the outline shape I am really interested in. Any thoughts how to get that without having to plot the points at all? At the moment I am thinking of plotting the points...
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    A Reducing computation for large power sets

    Yes all number of unique combinations (order does not matter) are possible. Duplicates are not included. To generate the set I've just used binary numbers. The problem is that at 50 options the number of possible combinatins is huge. I have not had chance to try it yet but I think that it does...
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    A Reducing computation for large power sets

    Thanks, I will definitely give that a try with a convex hull algorithm. It's for comparing different options.
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    A Reducing computation for large power sets

    any thoughts on how to reduce the number of points? What I am really aiming for is to be able to determine what the outline shape of the distribution would be just from looking at the initial data. Do you think it would be useful to run the program and save the results for 0 options all the way...
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    A Reducing computation for large power sets

    Appologies. 2^50 is the total number of possible combinations for when I have 50 options. Some examples for the simplified case above being e.g. AB, BC, ABC, CD, ADC ... In the case above there would be 2^4 possible combinations of A,B,C, &D
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    A Reducing computation for large power sets

    To illustrate my problem say I have the following table: Option, x , y A , 25 , 30 B , 5 , 12 C , 3 , 9 D, 12, 13 I want to create a graph of every possible combination in the set where the x values are added and the y values are added. For example say it was...
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    I Predicting new polynomials from known ones

    Not too sure which forum this would be best suited to. Say I have lots of polynomials that have been obtained through conducting experiments, with the different coefficients in the polynomial representing different physical properties that have been changed in each case. How could I use this...
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    Reed Solomon Division: Understanding M(x) & G(x) Division

    Thanks again. For your G(x) using the hex numbers did you just multiply out the brackets? Copy and pasting into wolfram alpha gives a much longer expression with different coefficients.
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    Reed Solomon Division: Understanding M(x) & G(x) Division

    I have an application that will output numbers comprised of the digits 0-9 (numbers like 47565, 34489, 92838 – this will be the value outputted from an ADC on a microcontroller). I want to provide some FEC via Reed Solomon encoding. I am going with GF(24) and will just not use the values above...
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    Reed Solomon Division: Understanding M(x) & G(x) Division

    What would you use for the irreducible prime polynomial for GF(11)? For the multiplication table what I did was just create a table (from 0 - 10) where if the product is less than 11 you just use the product value but if it is greater than 11 use the modulus remainder. Do you mean that you...
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    Reed Solomon Division: Understanding M(x) & G(x) Division

    Thank you very much for your kind help. Really appreciated :)
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    Reed Solomon Division: Understanding M(x) & G(x) Division

    ah thanks, I am wanting to encode numbers that will comprise 0-9. Could I just do GF(2^4) and just not use the additional numbers?
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