Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
888 views
in Technique[技术] by (71.8m points)

computer science - What is the difference between heuristics and metaheuristics?

After some research about algorithms I found two terms which confuses me. I've read at least 20 papers and yet, there aren't any clear definition about either. I hope someone can help me tell the difference between heuristics and metaheuristics algorithms. And if possible, add the source of it.

ps: I already know what the meaning is of the words, but I don't know what the exact difference is between them in computer science.

thanks in advance

question from:https://stackoverflow.com/questions/10445700/what-is-the-difference-between-heuristics-and-metaheuristics

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

You could think of a heuristic like an approximate (not approximation) solution to a problem. The difference between approximate and approximation is that the first is about getting a good guess of the solution of a problem, but that you don't really know how good it is. The second is about getting a solution for which you can prove how close it is to the optimal solution.

So, heuristics are often problem-dependent, that is, you define an heuristic for a given problem. Metaheuristics are problem-independent techniques that can be applied to a broad range of problems. An heuristic is, for example, choosing a random element for pivoting in Quicksort. A metaheuristic knows nothing about the problem it will be applied, it can treat functions as black boxes.

You could say that a heuristic exploits problem-dependent information to find a 'good enough' solution to a specific problem, while metaheuristics are, like design patterns, general algorithmic ideas that can be applied to a broad range of problems.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...