遗传算法(GA)和遗传规划(GP)是一个有趣的研究领域。

我想知道你使用GA/GP解决的具体问题,以及如果你没有自己的库/框架,你使用了什么库/框架。

问题:

你用GA/GP解决过什么问题? 你使用了哪些库/框架?

我在寻找第一手的经验,所以请不要回答,除非你有。


当前回答

As part of my undergraduate CompSci degree, we were assigned the problem of finding optimal jvm flags for the Jikes research virtual machine. This was evaluated using the Dicappo benchmark suite which returns a time to the console. I wrote a distributed gentic alogirthm that switched these flags to improve the runtime of the benchmark suite, although it took days to run to compensate for hardware jitter affecting the results. The only problem was I didn't properly learn about the compiler theory (which was the intent of the assignment).

我本可以用现有的默认标志来播种初始种群,但有趣的是,算法发现了一个与O3优化级别非常相似的配置(但实际上在许多测试中更快)。

编辑:我还用Python写了我自己的遗传算法框架,只是使用popen命令来运行各种基准测试,尽管如果不是评估作业,我会看看pyEvolve。

其他回答

As part of my thesis I wrote a generic java framework for the multi-objective optimisation algorithm mPOEMS (Multiobjective prototype optimization with evolved improvement steps), which is a GA using evolutionary concepts. It is generic in a way that all problem-independent parts have been separated from the problem-dependent parts, and an interface is povided to use the framework with only adding the problem-dependent parts. Thus one who wants to use the algorithm does not have to begin from zero, and it facilitates work a lot.

你可以在这里找到代码。

你可以用这个算法找到的解决方案已经在科学工作中与最先进的算法SPEA-2和NSGA进行了比较,并且已经证明 算法的性能相当,甚至更好,这取决于您用来衡量性能的指标,特别是取决于您正在关注的优化问题。

你可以在这里找到它。

同样,作为我的论文和工作证明的一部分,我将这个框架应用于项目组合管理中的项目选择问题。它是关于选择对公司增加最大价值的项目,支持公司的战略或支持任何其他任意目标。例如,从特定类别中选择一定数量的项目,或最大化项目协同作用,……

我的论文将该框架应用于项目选择问题: http://www.ub.tuwien.ac.at/dipl/2008/AC05038968.pdf

之后,我在一家财富500强公司的投资组合管理部门工作,在那里他们使用了一种商业软件,该软件还将GA应用于项目选择问题/投资组合优化。

更多资源:

框架文档: http://thomaskremmel.com/mpoems/mpoems_in_java_documentation.pdf

mPOEMS演示论文: http://portal.acm.org/citation.cfm?id=1792634.1792653

实际上,只要有一点热情,每个人都可以很容易地将通用框架的代码适应任意的多目标优化问题。

在读完《盲人钟表匠》之后,我对道金斯所说的帕斯卡程序产生了兴趣,他开发了一个可以随着时间进化的生物模型。我对使用Swarm编写自己的程序很感兴趣。我没有画出他画的那些奇特的生物图形,但我的“染色体”控制着影响生物体生存能力的特征。他们生活在一个简单的世界里,可以与彼此和环境决一死战。

生物的生存或死亡部分取决于偶然性,但也取决于它们如何有效地适应当地环境,如何有效地消耗营养物质以及如何成功地繁殖。这很有趣,但也向我妻子证明了我是一个极客。

进化计算研究生班: 开发了TopCoder马拉松比赛49:megpartty的解决方案。我的小组正在测试不同的域表示法,以及不同的表示法如何影响ga找到正确答案的能力。我们为这个问题编写了自己的代码。

Neuroevolution and Generative and Developmental Systems, Graduate Class: Developed an Othello game board evaluator that was used in the min-max tree of a computer player. The player was set to evaluate one-deep into the game, and trained to play against a greedy computer player that considered corners of vital importance. The training player saw either 3 or 4 deep (I'll need to look at my config files to answer, and they're on a different computer). The goal of the experiment was to compare Novelty Search to traditional, fitness-based search in the Game Board Evaluation domain. Results were relatively inconclusive, unfortunately. While both the novelty search and fitness-based search methods came to a solution (showing that Novelty Search can be used in the Othello domain), it was possible to have a solution to this domain with no hidden nodes. Apparently I didn't create a sufficiently competent trainer if a linear solution was available (and it was possible to have a solution right out of the gates). I believe my implementation of Fitness-based search produced solutions more quickly than my implementation of Novelty search, this time. (this isn't always the case). Either way, I used ANJI, "Another NEAT Java Implementation" for the neural network code, with various modifications. The Othello game I wrote myself.

首先,Jonathan Koza的《遗传编程》(在亚马逊上)几乎是一本关于遗传和进化算法/编程技术的书,有很多例子。我强烈建议你去看看。

As for my own use of a genetic algorithm, I used a (home grown) genetic algorithm to evolve a swarm algorithm for an object collection/destruction scenario (practical purpose could have been clearing a minefield). Here is a link to the paper. The most interesting part of what I did was the multi-staged fitness function, which was a necessity since the simple fitness functions did not provide enough information for the genetic algorithm to sufficiently differentiate between members of the population.

这是一段时间以前的事了,但我滚动了一个GA来进化实际上是图像处理内核的东西,以从哈勃太空望远镜(HST)图像中去除宇宙射线痕迹。标准的方法是用哈勃望远镜进行多次曝光,只保留所有图像中相同的东西。由于HST时间是如此宝贵,我是一个天文学爱好者,最近参加了进化计算大会,我考虑使用GA来清理单次曝光。

这些个体以树的形式存在,以3x3像素的区域作为输入,执行一些计算,并决定是否以及如何修改中心像素。通过将输出图像与用传统方法(即叠加曝光)清理的图像进行比较来判断适合度。

这实际上是可行的,但还不足以让我们放弃原来的方法。如果我的论文没有时间限制,我可能已经扩展了算法可用的遗传部分。我很确定我可以大大提高它。

使用的库:如果我没记错的话,用于天文图像数据处理和I/O的IRAF和cfitsio。