Ask Ghassem - Recent activity in Artificial Intelligence

Edited: How to use Genetic Algorithm to optimize a function?

Wed, 23 Nov 2022 10:19:30 +0000

Assume the function is defined as $f(x,y)=x^2+y^2-4xy$, and $1\leq x \leq 4,1\leq y \leq 4$. The Genetic Algorithm is selected to maximize the function. If the first population for pairs of $(x,y)$ is defined as $S=\{A=(1,2), B=(2,1), C=(2,2), D=(2,3), E=(3,1) \}$.

a) Calculate the fitness of each of individuals (A,B,C,D,E) in population if: $\text{fitness function}=f(x,y)$
b) Calculate the probability of each individual and sort them in descending order. Which individual has the maximum fitness (probability)? $p_{i}=\frac{f_{i}}{\sum_{j=1}^{N} f_{j}}$
c) Draw the roulette wheel and calculate the boundaries for each individual
d) If we use two individuals and their arithmetic mean for crossover each time, and for mutation, we add 0.1 to x and subtract 0.1 from y for each individual created after crossover, what will be the next population with five members?
For part (d), use the following random numbers in order whenever you need them in the selection process:
$\text{random numbers} = \{0.780,0.220,0.776,0.507,0.822,0.765,0.288,0.881,0.895,0.421\}$

Very short text classification when category text should be replaced by another category text?

Thu, 11 Feb 2021 12:48:47 +0000

I need some tool to classify articles based on short category text which consists of two or three words separated by '-'. The RSS/XML tag content is for example:

Foreign - News

Football - Foreign

I created my own categories in DB and now I need to classify categories from parsed RSS of this news source, so it fits news categories defined by me.

I would, for example need all articles containing category "football" to be identified as a category Sport but sometimes those categories XML tags contains exact match like Foreign - News should belong in the DB to category defined by me as Foreign.

Since I used only trained decision trees frameworks from AI so for another project so far, I would like to hear advice about probably AI based approach, technique or particular framework I can use to solve this problem. I don't want to get into a dead-end street by my own poor, in the field of AI not very experienced decision.

While it can be solved by many ifs and 'contains' function, it seems to me like not a very good solution.

TLDR; I need basically something like "clever, flexible and universal if-elseif".

NOTE: I can also use article description text, if that would be necessary but it seems to me that this former category text is unambiguous enough for this kind of problem.

Answered: What is the difference between Artificial Intelligence and Machine Learning?

Mon, 04 Mar 2019 23:24:29 +0000

The figure below should show you some of the most important differences.

https://i.imgur.com/XtkstSQ.png