Questions on how to represent real-world or non computer science problems with computer science tools.

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0answers
8 views

checking of mathematical model for flow shop based departure time [on hold]

My final project is about permutation flow shop scheduling problem with buffer limits and energy considerations. My base model for final project is permutation flow shop based departure time. I find ...
1
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1answer
25 views

Data versioning in a relational database

I've been working on an industrial project where my job was to design a data model in-memory and in a relational database in such a way, that can capture the time-varying nature of the production ...
1
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1answer
39 views

Converting reality to Petri net

I'm autistic and I think a bit differently. I have superior memory and visual thinking, but I have a problem with converting real thing to abstract. I'd like to model reality processes with Petri ...
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1answer
41 views

Requiring at least one alldiff constraint to be satisfied converted to SAT

For generating certain hard puzzles, I am trying to model a problem (ultimately) in SAT. I don't know how to do that, so I am starting with CSP because it's more expressive. In CSP, there is a global ...
1
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0answers
45 views

How to convert a search solution to a path to be tracked?

Let's say I have a space with obstacles and I'm trying to control a robot's movement while avoiding obstacles. I also have a start state and a goal state. I use a search algorithm to find the shortest ...
3
votes
1answer
193 views

Set the parameters of a Erdos-Renyi graph generator to get a specific mean degree

I'm trying to reproduce the synthetic networks (graphs) described in some papers. The topic is the same as a previous question of mine, but with a different focus. It is stated that the Erdos-Renyi ...
3
votes
1answer
91 views

Mathematical model for a webpage layout?

Getting layout right (even if only a structure is considered) with HTML5/CSS3 is still more like an art or black magic. On the other hand, there are other GUI systems (like wxWindows and Tcl/Tk) and ...
4
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0answers
57 views

Solving an Interlacing Cords puzzle inside a Truncated Octahedron

My friend got me this really interesting puzzle Each node can be slided or docked around the Truncated Octahedron, creating knots and tangles in the middle of the puzzle. The idea is to move the ...
2
votes
1answer
97 views

Boat riddle as a combinatorial optimization problem?

I remember a riddle about a bunch of people on a river bank, and a boat with limited capacity (lets say the boat can transport 2 people at a time). There are various relations between the people like: ...
1
vote
2answers
165 views

How to represent circles in x-y coordinates [closed]

I would like to be able to represent circles in x-y coordinates. Each circle contains an x and y coordinates and radius in double data type. My goal is to compare circles with each other whether ...
4
votes
2answers
403 views

Is $a^n b^n$ an artificial language or does it occur in the real world?

The classic example of a context-free grammar is $a^nb^n$. That is, $n$ occurrences of $a$ followed by an equal number of occurrences of $b$. Do such forms occur in the real world? Can you provide an ...
6
votes
2answers
157 views

Peer grading design - choosing a graph, to get accurate rankings/ratings

Background. I am writing some code for semi-automated grading, using peer grading as part of the grading process. Students are given pairs of essays at a time, and the students have a slider to choose ...
15
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8answers
909 views

What randomness really is

I'm a Computer Science student and am currently enrolled in System Simulation & Modelling course. It involves dealing with everyday systems around us and simulating them in different scenarios by ...
1
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0answers
25 views

Predict binary occupancy vector from history of vectors

I have a set of binary vectors where each vector represents one day of occupancy in a house and consists of 48 elements (each element for 30 minutes of the day). Each element can be 1 meaning that ...
6
votes
2answers
143 views

Building probability distribution functions from observation

There are N players and M objects, each of the objects has a value. Each player has a strategy in choosing an object. Each round a player will choose an object, many players can choose the same ...
4
votes
1answer
85 views

What are the rudimentary types of information connectivity i.e. model types?

I am looking at a modelling tool and are trying to determine all the types of ways that you can model (at a rudimentary level) I remember seeing a list of ways in which you can connect or categorise ...
6
votes
1answer
121 views

How to represent the interests of a Facebook user

I'm trying to figure out a way I could represent a Facebook user as a vector. I decided to go with stacking the different attributes/parameters of the user into one big vector (i.e. age is a vector of ...
6
votes
1answer
96 views

How to score a given arrangement of windows on a screen to produce good layouts

(this is related to my other question, see here) I would like to write a function that scores a given arrangement of windows on a screen. The purpose of this function is to determine whether a ...
7
votes
1answer
106 views

Efficient queriable data structure to represent a screen with windows on it

(this is related to my other question, see here) Imagine a screen, with 3 windows on it: I'd like to find an efficient data structure to represent this, while supporting these actions: return a ...
2
votes
1answer
54 views

How can I measure the usability of a catalogue?

This question might seems vague but heres the context: When we are focusing on HCI we would most likely be interested on knowing first how the user usually deals with a certain object. We then try to ...
11
votes
4answers
1k views

How to devise an algorithm that suggests feasible cooking recipes?

I once had a veteran in my course that created an algorithm that would suggest cooking recipes. At first, all sort of crazy recipes would come out. Then, she would train the cooking algorithm with ...
3
votes
1answer
95 views

Is it viable to use an HMM to evaluate how well a catalogue is used?

I was interested on evaluating a catalogue that students would be using to observe how is it being used probabilistically. The catalogue works by choosing cells in a temporal sequence, so for ...
2
votes
1answer
122 views

Pattern classification: what goes into the sample?

I am trying to compare the performance of a classification result with Bayes classifier, K-NN, Piece wise component analysis (PCA). I have doubts regarding the following (please excuse my lack of ...
19
votes
1answer
383 views

Clustering of Songs (The Joe Walsh Problem)

The Eagles are a rock supergroup from the 70s and 80s, responsible for such classics as Hotel California. They have two quite distinctive sounds, one where guitarist Joe Walsh is present (for example, ...
10
votes
2answers
174 views

CCS process for a drink dispenser with two different prices

A drink dispenser requires the user to insert a coin ($\bar c$), then press one of three buttons: $\bar d_{\text{tea}}$ requests a cup of tea $e_{\text{tea}}$, ditto for coffee, and $\bar r$ requests ...
21
votes
4answers
2k views

How to determine likely connections in a social network?

I am curious in determining an approach to tackling a "suggested friends" algorithm. Facebook has a feature in which it will recommended individuals to you which it thinks you may be acquainted with. ...
14
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1answer
458 views

Efficient encoding of sudoku puzzles

Specifying any arbitrary 9x9 grid requires giving the position and value of each square. A naïve encoding for this might give 81 (x, y, value) triplets, requiring 4 bits for each x, y, and value (1-9 ...