Tag: finding

mathematical optimization – Need help finding a value to linearize data

I have two column data which is y vs x. I want to linearize the data by this formula 1 / (x-b) but I don't know how to determine the value b so that ln (y) vs 1 / (x-b) becomes a linear line. So I wrote the following code to plot the ln (y) vs 1 / (xb) by changing the value b manually and looking at the graph ln (y) vs 1 / (xb) to find the best linear behavior . Do you know a better way to do this instead of changing the b value manually?

x = {331,334,335,336};
y = {10,50,100,1000};
b = 290;
Xinv = 1/(x - b)
lnY = N(Log(y));
(data = Transpose({Xinv, lnY})) // MatrixForm;
ListPlot(data, PlotMarkers -> {"O"}, 
 PlotStyle -> {Darker@Green, PointSize(3)})
nlm = NonlinearModelFit(data, a*x + b, {a, b}, x);
Show(ListPlot(data, PlotMarkers -> "!(*
StyleBox("O",nFontWeight->"Plain"))"), Plot(nlm(x), {x, -1, 2}),
  Frame -> True)

Finding an app to merge photos and videos into a slideshow

(I don't know if this is the right place to ask this question)

I'm looking for an application (for Android or Mac) that allows you to merge photos and videos into a slideshow.

Where should I include my wallet address after finding the hash less than the target – Bitcoin

Exploring a valid block involves several steps.

To get started, you need to know which block you're extracting from, which is specified by the previous block hash.

Next, you need to get a merkle root that locks a valid set of transactions. Usually, this is a set of transactions from the mempool + coinbase transaction, so that there are no double spend or invalid transactions. These transactions are assembled in a merkle tree, from which the merkle root is placed in the block header.

The coinbase transaction in particular is important, as it must follow the coinbase transaction rules (inclusion of block height, correct output for block reward, extraNonce). It should be placed as the first transaction in the block and contains the output that sends the BTC to your wallet.

Finally, you need to add in the other fields such as block version, time, nonce, etc.

This full 80-byte block header is the hashed payload compared to the target value. If your resulting hash does not meet the target requirements, you must modify the nonce in the block header, extraNonce in the coinbase transaction or one of the transactions in your merkle tree to get a new merkle root and hash the new block header. This process is repeated until you find a valid hash for the target.

In order, your approach would be like:

  • Get a list of transactions you want to include (this can be an empty list)
  • Select your wallet address to receive the blocking reward
  • Build a coinbase transaction that pays this reward to your selected address (plus transaction fees)
  • Make coinbase tx first on your list
  • Build a merkle tree from this list
  • Select the merkle root in this tree
  • Continue as you already do

virus – Finding a specific malware sample for malware analysis

virusshare.com is another excellent repository of malware samples, having a large number of samples. An overview of the website home page:

enter description of image here

Access is by invitation only, so you will need to send a letter to the site administrator.

Another good resource I know – www.deependresearch.org

Need help finding a short domain name

Need Help Finding A Short Domain Name | Web Talk Hosting

& # 39;);
var sidebar_align = & # 39; droite & # 39 ;;
var content_container_margin = parseInt (& # 39; 350px & # 39;);
var sidebar_width = parseInt (& # 39; 330px & # 39;);
// ->

  1. * Need help finding a short domain name

    Need help finding a short and good name for the social networking website.

  2. There are a number of websites available that generate and suggest domain names, search them on Google and try to generate a domain name with the keywords of your choice. should help you.

  3. Thank you for your reply . Of course I will.

  4. Try namestation dot com which helps generate names for social networking sites, then search for the domain name at popular registrars like godaddy, enom, etc.

  5. You can try these tools: –
    Domain wheel
    Name Lix
    You can also search for it on Google.

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programming languages ​​- Finding the bound function of the loop invariant

In Programming of the 1990s, by Edward Cohen, the author gives an example of a linked function.

For example, if we have $ B equivalent 10 – n $ or $ n = 0 $so let's say $ B $ will eventually be falsified if 10 – n is decreased. So, we would need to choose for our related function $ t = 10 – n $. A drop in value will eventually falsify $ B $.

How did he find such a linked function?
Does it depend on a variable, like this: $ t (n) = 10 – n $ ?

mg.metric geometry – Finding an orthocenter with altitude equations

I can't understand that! It is the orthocenter of the altitudes of a triangle. I have the equations for the 3 altitudes (and I checked them to make sure they are correct) and I solved for x then solved for y to get the orthocenter but it only works with a specific combo of 2 altitudes. Why can't it be a combo? I get 1, -1 with one set and I get 4.5 with another set. 4.5 is the orthocenter.

TRIANGLE

A: 0, -3

B: 4.5

C: 8.3

ALTITUDE

A-alt is y = 2x-3

B-alt is y = -4 / 3x + 31/3

C-alt is y = -1 / 2x + 7

2x-3 = -4 / 3x + 31/3 // x = 4

y = 2 (4) -3 // y = 5

4.5 is correct

2x-3 = -1 / 2x + 7 // x = 1

2 (1) – 3 = -1

1, -1 is incorrect

So, I always get a point on a line, but how X from one equation = x from another equation and not be an intersection. Google says solve for two of them and the third has to cross!

Resolving inequalities and finding parameters

Let

$$ S = 4 ( alpha -2) beta -58 ( alpha -2) ^ 2- beta ^ 2-8 c_6 left (7 alpha +2 c_6-13 right) $$

$$ T = – frac { left (( alpha -4) ( alpha -2) ( alpha (3 alpha +4 beta -27) -18 beta +60) +4 c_2 ( alpha + beta -5) right) {} ^ 2} {4 ( alpha + beta -5) ^ 2} + c_2 ( alpha + beta -5) left (8 alpha + beta +4 c_6-16 right) {} ^ 2-c_2 ( alpha + beta -5) left (2 ( alpha -2) (3 alpha +10 beta -6) +8 c_6 ( alpha + beta -3) right) $$

$$ U = left (- frac {1} {12} left (-12 c_4 ( alpha + beta -4) -36 c_2 right) left (-2 alpha + beta -2 left (-5 alpha -2 c_6 + 10 right) +4 right) {} ^ 2- frac {1} {6} c_6 left ( frac {3 ( alpha -6) ( alpha – 5) ( alpha -4) ( alpha -2)} { alpha + beta -5} -6 ( alpha -4) (2 alpha -9) ( alpha -2) -12 c_2 right ) left (-2 alpha + beta -2 left (-5 alpha -2 c_6 + 10 right) +4 right) – frac {1} {6} left ( frac {3 ( alpha -6) ( alpha -5) ( alpha -4) ( alpha -2)} { alpha + beta -5} -6 ( alpha -4) (2 alpha -9) ( alpha -2) -12 c_2 right) left (-3 ( alpha -2) (3 alpha -11) -2 c_6 ( alpha + beta -3) -6 c_4 right) + frac { 1} {12} left (-12 c_4 ( alpha + beta -4) -36 c_2 right) left (-2 ( alpha -2) (7 alpha -24) -4 ( alpha + beta -3) left (-5 alpha -2 c_6 + 10 right) right) right) {} ^ 2-4 left (- frac {1} {36} left ( frac { 3 ( alpha -6) ( alpha -5) ( alpha -4) ( alpha -2)} { alpha + beta -5} -6 ( alpha -4) (2 alpha -9) ( alpha -2) -12 c_2 right) {} ^ 2 + c_2 ( alpha + beta -5) left (-2 alpha + beta -2 left (-5 alpha -2 c_6 + 10 right) +4 right t) {} ^ 2-c_2 ( alpha + beta -5) left (-2 ( alpha -2) (7 alpha -24) -4 ( alpha + beta -3) left (- 5 alpha -2 c_6 + 10 right) right) right) left (- frac {1} {4} c_6 ^ 2 left (-2 ( alpha -2) (7 alpha -24) -4 ( alpha + beta -3) left (-5 alpha -2 c_6 + 10 right) right) – frac {1} {2} c_6 left (-2 alpha + beta – 2 gauche (-5 alpha -2 c_6 + 10 right) +4 right) left (-3 ( alpha -2) (3 alpha -11) -2 c_6 ( alpha + beta -3) -6 c_4 right) – frac {1 } {4} left (-3 ( alpha -2) (3 alpha -11) -2 c_6 ( alpha + beta -3) -6 c_4 right) {} ^ 2 + c_4 left (- 2 alpha + beta -2 left (-5 alpha -2 c_6 + 10 right) +4 right) {} ^ 2-c_4 left (- 2 ( alpha -2) (7 alpha – 24) -4 ( a lpha + beta -3) left (-5 alpha -2 c_6 + 10 right) right) right) $$,
or $ c_2, c_4, c_6 in mathbb {R} $ and $ alpha, beta> 0 $. My question is the following:

Are there $ alpha, beta> 0 $ and $ c_2, c_4, c_6 in mathbb {R} $ such as $ S> 0 $, $ T> 0 $, $ U le0 $?

I used the codes 

FindInstance(S>0 && T>0 && U<=0 && α > 0 && β >0, {c2,c4,c6,α,β}, Reals)

But it lasts more than 5 minutes and no results can be obtained. So I pick up several α on $ (1 / 10.10) $ like that

α=17/7; FindInstance(S>0 && T>0 && U<=0 && α > 0 && β >0, {c2,c4,c6,β}, Reals)

He replied with an empty set

{}

It seems that the interval of $ alpha $ is so narrow and hard to find. Any other approach to get a single solution $ ( alpha, beta, c_2, c_4, c_6) $?

Any reference, suggestion, idea or comment is welcome. Thank you!

S=-58 (-2 + α)^2 + 4 (-2 + α) β - β^2 - 8 Subscript(c, 6) (-13 + 7 α + 2 Subscript(c, 6))

T=-((-4 + α) (-2 + α) (60 - 
    18 β + α (-27 + 3 α + 4 β)) + 
 4 (-5 + α + β) Subscript(c, 
  2))^2/(4 (-5 + α + β)^2) + (-5 + α + β) Subscript(c, 2) (-16 + 8 α + β + 4 Subscript(c, 6))^2 - (-5 + α + β) Subscript(c, 2) (2 (-2 + α) (-6 + 3 α + 10 β) + 8 (-3 + α + β) Subscript(c, 6))

U=(-(1/12) (-36 Subscript(c, 2) - 
  12 (-4 + α + β) Subscript(c, 4)) (4 - 
  2 α + β - 
  2 (10 - 5 α - 2 Subscript(c, 6)))^2 + 1/12 (-36 Subscript(c, 2) - 
  12 (-4 + α + β) Subscript(c, 
   4)) (-2 (-2 + α) (-24 + 7 α) - 
  4 (-3 + α + β) (10 - 5 α - 
     2 Subscript(c, 6))) - 1/6 (-6 (-4 + α) (-2 + α) (-9 + 2 α) + (
  3 (-6 + α) (-5 + α) (-4 + α) (-2 + α))/(-5 + α + β) - 12 Subscript(c, 2)) (4 - 2 α + β - 
  2 (10 - 5 α - 2 Subscript(c, 6))) Subscript(c, 6) - 1/6 (-6 (-4 + α) (-2 + α) (-9 + 2 α) + (
  3 (-6 + α) (-5 + α) (-4 + α) (-2 + α))/(-5 + α + β) - 12 Subscript(c, 2)) (-3 (-2 + α) (-11 + 3 α) - 6 Subscript(c, 4) - 2 (-3 + α + β) Subscript(c, 6)))^2 - 4 (-(1/36) (-6 (-4 + α) (-2 + α) (-9 + 2 α) + (
   3 (-6 + α) (-5 + α) (-4 + α) (-2 + α))/(-5 + α + β) - 12 Subscript(c, 2))^2 + (-5 + α + β) Subscript(c, 2) (4 - 2 α + β - 2 (10 - 5 α - 2 Subscript(c, 6)))^2 - (-5 + α + β) Subscript(c, 2) (-2 (-2 + α) (-24 + 7 α) - 4 (-3 + α + β) (10 - 5 α - 
      2 Subscript(c, 6)))) (Subscript(c, 4) (4 - 2 α + β - 
   2 (10 - 5 α - 2 Subscript(c, 6)))^2 - 
Subscript(c, 4) (-2 (-2 + α) (-24 + 7 α) - 4 (-3 + α + β) (10 - 5 α - 2 Subscript(c, 6))) - 
1/4 (-2 (-2 + α) (-24 + 7 α) - 
   4 (-3 + α + β) (10 - 5 α - 
      2 Subscript(c, 6))) !(*SubsuperscriptBox((c), (6), (2))) - 
1/2 (4 - 2 α + β - 
   2 (10 - 5 α - 2 Subscript(c, 6))) Subscript(c, 
 6) (-3 (-2 + α) (-11 + 3 α) - 6 Subscript(c, 4) - 
   2 (-3 + α + β) Subscript(c, 6)) - 
1/4 (-3 (-2 + α) (-11 + 3 α) - 6 Subscript(c, 4) - 
   2 (-3 + α + β) Subscript(c, 6))^2)

Finding a closed auction management script

Hello,

I am a coach. I need a class of 50 people maximum each time. My selling method is that I don't set the price, but I ask customers to make me their best offers. Then I choose from the top 50.

Now use emails. So sometimes I get over 200 offers and it takes a long time to read and classify them manually. Is there a WP plugin (or any other website script) that can help me with this task?

Thank you.

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