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• The best algorithm enhancing alpha-beta?

  - by Risa

  I'm studying AI. My teacher gave us source code of a chess-like game and asked us to enhance it. My exercise is to improve the alpha/beta algorithm implementing in that game. The programmer already uses transposition tables, MTD(f) with alpha/beta+memory (MTD(f) is the best algorithm I know by far). So is there any better algorithm to enhance alpha-beta search or a good way to implement MTD(f) in coding a game?

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• Setting ViewController delegates in iPhone runtime

  - by Stein Rune Risa

  I am writing an iPhone application and needed to use the address book functionality. For this to work, it is necessary to specify a ABPeoplePickerNavigationControllerDelegate on the ViewController. The problem is that I am creating all fields and buttons dynamically runtime, and thus does not have any custom ViewController - using only UIViewController class. My question is then - how can I specify the delegate runtime without having to create a ViewController class just for this purpose.

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• SVM in OpenCV: Visual Studio 2008 reported error wrongly (or is it right?)

  - by Risa

  I'm using MS Visual Studio 2008, OpenCV, C++ and SVM for a OCR-related project. At least I can run the code until yesterday, when I open the project to continue working, VS reported this error: error C2664: 'bool CvSVM::train(const CvMat *,const CvMat *,const CvMat *,const CvMat *,CvSVMParams)' : cannot convert parameter 1 from 'cv::Mat' to 'const CvMat *' It didn't happen before and I haven't changed any code relating to it (I only changed the parameters for the kernel). The code got error is: Mat curTrainData, curTrainLabel; CvSVM svm; . . . svm.train(curTrainData, curTrainLabel, Mat(), Mat(), params); If I hover on the code, I still got this tip: image. Which means my syntax isn't wrong. So why do VS bother to report such an error?

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