Stochastic Diffusion Search is a search algorithm that can take the form of either a neural network or a swarm and attempts an optimal application of resources. The agents scatter randomly across the search area and keep searching random locations until either they or one of their neighbours find a location that they determine to be good. An agent that finds a good location tries to take a neighbour to that location (which will in-turn judge whether it believes the location to be good, or bad, and do the same), while an agent that fails to find a good location will follow a neighbour that has, given the opportunity. Continue reading
In this post, we’ll be exploring the application of Dispersive Flies Optimisation, as originally pondered in my previous post. Specifically, we’ll discuss applying DFO to AirBnB data, as the AirBnB data is readily available with very little effort. I will be referring to the data provided for London, however all of the available data should be the same.
There are probably loads of ways we can apply DFO to search this information; I’m going to be looking for the best place to stay. Continue reading
It’s quite curious that at the time of writing, this algorithm doesn’t have so much as a Wikipedia page. Heck, a cursory Google search implies that the individual who came up with it is the very same guy who asked for people to think about it.
Yeah, you! I know you’re out there Mohammad!
Dispersive Flies Optimisation
Dispersive Flies Optimisation (DFO) is a swarm intelligence algorithm that aims to find the best piece of data in a matrix. How good a piece of data (referred to as an agent) is, is judged by its fitness. An agent contains data, or I suppose metadata, such as a location, among other possible things. The flies are then scattered across various locations within the data and set to finding the optimal location, which is either the lowest possible fitness, or highest. Continue reading
There are two dominant No Free Lunch theorem’s that relate to computing. One is focused towards search and optimisation, while the other is for supervised machine learning.
The Key Point
Eric Cai eloquently describes the No Free Lunch theorem in relation to Machine Learning. He describes the theorem as a series of simplifications and assumptions that apply to a problem and it’s solution. In turn, he also points out that the simplifications and assumptions that work for one problem and it’s solution will not nescessarily work on another problem, thus making the solution ineffective.
The “No Free Lunch” theorem states that there is no one model that works best for every problem
The idea that a solution cannot be picked up and applied to another problem without any work at all is most likely the origin of the name.
The original No Free Lunch Theorems for Optimization paper can be found here, if you’re into that kind of thing.
Intellectuals Party Invests in Infrastructure, Government Invests in Soldiers
Individuals and businesses in association with the Seong Intellectuals Party yesterday invested a collective value of approximately 50 Million credits into the expansion of Seong’s farming infrastructure. The money is expected to contribute significantly to the cost of developing the Brightbank Hydroponics Greenhouses.
In a disappointing turn, the Planetary Government has invested 10 Million credits in the creation of the planet’s first standing military in 100 years. A Quorum House representative commented on the decision saying “The political climate around the core worlds is clearly changing. We need to be prepared for whatever is going to happen, if we are to continue to prosper.”
ALL OUT WAR ON SEONG
The HDF Höfn opened fire on private facilities last night, in response to the Seong Intellectual Party’s reluctance to return Hallfridian artifacts. A representative of the Seong Intellectual’s Party told SNN “Some of our membership companies has serious fears about their well-being upon returning these artifacts. These items were seem to be the only thing standing between the researchers and forceful retribution from the local security force and visiting Hallfridian force.”
The Höfn used a precision bombardment of various research facilities known to be operated by members of the Seong Intellectuals Party. While nobody was harmed, there are clear questions as to how the government could permit such actions to occur. Reports from the scene describe the Seong emergency services as being on the scene before the strikes took place. Thus far, one person has been reported killed, and 14 injured.
It’s unclear how much research was destroyed in the attack. The property damage was significant,and neighbours were terrified. In the aftermath, the emergency services recovered the artifacts in addition to casualties. They have been returned to the Höfn which is expected to leave within the next few days.
Deuel Engineering Found Guilty of Rules Breach
The race commission have confirmed Deuel Engineering used an engine type and design explicitly forbidden in competition rules. Their most recent tournament win has been voided by unanimous vote.
Have you ever read a book and walked away inspired? I found myself reading The Pragmatic Programmer at a friend’s reccomendation. A book full of interesting ideas and advice. In particular, a suggestion of programatically generating documentation struck me as a thing I would find useful. Because let’s admit it, sometimes we forget things about functions, objects, etc. I shall call it, Autodex! Because things need names. Continue reading
This is a Dell CS24-SC server, originally created for Facebook’s data centres in the US; or at least what remains one. The listing described the unit as faulty when tested, and included a pair of Xeon E5430 2.66Ghz CPU’s, but no ram or hard drvies. The lister described it as “Will power on, but won’t start.” At £27 including postage, I figured I’d take the gamble. Suitable RAM was another £10, and everything else was at hand. What follows is an overview of my quest to repair it, and set it up as an upgrade to my underpowered home server.
Problem the First
Analysis: Yep. Definately broken. The problem: No CPU’s. Continue reading
When I lived in a houseshare, one of my housemates always remarked that it never seemed like I actually did anything with my time. So how was it that I was actually meeting dealines with good quality work? Easy: super duper Kriss-level productivity. Perhaps it’s just how I perceve my day that makes me feel like I’ve not done much. When I actually sit down and think about how I manage to get everything done there’s actually a few things I tend to do that keep me going with as little effort as possible.
Posted in Work
Tagged environment, goals, notebooks, productivity, Rachen Aaron, records, Rory Vaden, sprints, time management, working, writing