On 03/18/2016 02:12 PM, Семенов Кирилл wrote: >> >> In effect, some time ago we evoked the possibility to drop GA support >> altogether since the code seemed little used and a lot of work was >> anticipated for making it useful beyond demo applications. > > > It is rather surprising, that ASF doesn't have any complex and extensive AI > instruments. I was looking for ANN some time ago and found only Mahout, > which seemed rather idle. > But Commons projects, IMO, are a good place for GA, while there is no > activity on AI merging/separating.
take a loot at http://jenetics.io which contains already everything you were asking for and is a very mature and well designed library. On top of that it is also under the Apache license and actually uses CM for testing. Thomas > but lacking human resources >> it's unlikely to become a reality any time soon. >> > > You can always point to lacking features by opening JIRA reports, but >> unless >> you intend to work on them yourself, I wouldn't bet on having them fixed >> rapidly. >> > > If someone would want to start a large overhaul of the GA code, that is >> worth considering. >> > > There surely can be a big scope. Btw, I'm still a student (last year of > BS). > So, I can do things listed and some more as a GSoC project (I was planning > to participate anyway). > https://docs.google.com/document/d/1RT_zNfBdf8rX2p5Qo0bIQ28SqwWUVPwfKmjStwK8SCw/edit# > - I wrote my vision and ready to refine it, > if you care to comment. > > I find it strange, that ASF list for GSoC doesn't include any Commons > projects or widely known (Cassandram Solr, Kafka, etc.) Is it even possible > to participate on behalf of Commons Math this year? > > Do you mean using an existing library, or do you suggest implementing the >> functionality specifically for CM? >> >> I'm not sure, which way is preferred. There is Commons Pool, that can > become a dependency, but is it okay to get any dependencies beside Junit? > And implementing It would definitely enlarge codebase. Which is less of two > evils? > > > > 2016-03-17 21:35 GMT+03:00 Gilles <gil...@harfang.homelinux.org>: > >> Hello. >> >> On Thu, 17 Mar 2016 19:11:16 +0300, Семенов Кирилл wrote: >> >>> Hi, >>> >>> I've been using genetic algorithm for some pet projects. And I'd like to >>> shed some light on a number of topics. >>> >> >> Thanks for you interest. >> >> Given that there exist Java softwares that seem to provide a more complete >> features set, I'd be interested to know a user's opinion on how the >> CM implementation compares with those. >> In effect, some time ago we evoked the possibility to drop GA support >> altogether since the code seemed little used and a lot of work was >> anticipated for making it useful beyond demo applications. >> >> 1. Am I correct to think, that now GA is working in a single thread? >>> >> >> Certainly. >> >> Very few CM codes are multi-thread ready. It was one of the task to >> be tackled for future versions of the library, but lacking human resources >> it's unlikely to become a reality any time soon. >> >> In >>> such case, was there any discussions on the subject (I didn't find within >>> a >>> quick check of Jira). >>> >> >> There were discussions (cf. "dev" ML archive). >> >> If not, could you provide some API reference. The >>> subject is important, because the ability to be distributed is one of the >>> key features of the GA. >>> >>> 2. Was there talks about implementing Pool for chromosomes? I found >>> enhancement proposal https://issues.apache.org/jira/browse/MATH-1219 - >>> which is aimed to solve the same problem - creating an enormous amount of >>> chromosomes in each generation. Chromosomes after each generation hangs in >>> a heap waiting for GC. Also, object pool can be implemented, supposing >>> that >>> chromosome would consist of List<? extends PooledObject>. >>> >> >> If someone would want to start a large overhaul of the GA code, that is >> worth considering. >> Do you mean using an existing library, or do you suggest implementing the >> functionality specifically for CM? >> >> 3. Examples of using getRepresentation method of AbstractListChromosome >>> seem misleading. Because getRepresentation is protected method and >>> writing >>> classes that implement MutationPolicy/CrossoverPolicy can't use it. For >>> rapid development one could implement public overriding method, but can't >>> it be defined public in AbstractListChromosome? If one is to write some >>> particular policy, he must override getRepresentation method in >>> CustomChromosome. But if one wants to write some common genetic policy >>> (e.g., some reordering crossover), he would face an obstacle mentioned. >>> >>> I'd like to create tasks for those in Jira. Just want to make sure, that >>> these topics would be useful and gather some information, other >>> devepoler's >>> opinions on a matter. >>> >> >> You can always point to lacking features by opening JIRA reports, but >> unless >> you intend to work on them yourself, I wouldn't bet on having them fixed >> rapidly. >> >> >> Best regards, >> Gilles >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org >> For additional commands, e-mail: dev-h...@commons.apache.org >> >> > > --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
