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A Deep Dive into Monte Carlo Tree Search
The idea is simple. Instead of ranking according to estimated rating, you add a bonus based on how uncertain you are about the rating. In this example, the top submission on HN has fewer upvotes than the second rank submission, but it’s also newer. So it gets a bigger uncertainty bonus. The uncertainty bonus fades over time, and that submission will fall in ranking unless it can prove its worth with more upvotes.

This is an instance of the Multi Armed Bandit problem and has a pretty extensive literature if you want to learn more.

UCT = Upper Confidence bounds applied to Trees
So how does this help us understand AlphaGoZero? Playing a game has a lot in common with the multi-armed bandit problem: when reading into a game variation, you want to balance between playing the strongest known response, and exploring new variations that could turn out to be good moves. So it makes sense that we can reuse the UCB idea.
ai  Python  algorithm 
5 hours ago by janpeuker
Algorithms of Oppression
Digital colonialism, searches for women bring up pornography
algorithm  bigdata  cw2018 
5 hours ago by craniac
Algorithms Behind Modern Storage Systems - ACM Queue
Different uses for read-optimized B-trees and write-optimized LSM-trees
algorithm  storage  Database 
14 hours ago by euler
Algorithms Behind Modern Storage Systems - ACM Queue
Different uses for read-optimized B-trees and write-optimized LSM-trees
algorithms  algorithm 
2 days ago by GameGamer43
Christopher Wylie: Bannon wanted "weapons" to fight a "culture war" at Cambridge Analytica - CBS News
The company learned that were segments of the population that responded to messages like 'drain the swamp' or images of walls or indeed paranoia about the deep state that weren't necessarily reflected in mainstream polling or mainstream political discourse that Steve Bannon was interested in to help build his movement," Wylie told lawmakers. He said that under Bannon's leadership at Cambridge Anlaytica, U.S. clients could request testing voter suppression efforts in their contracts.
trump  politics  algorithm  ai  altright  cw2018 
3 days ago by craniac

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