Search results for: ant colonyoptimization

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colonyoptimization</title> <meta name="description" content="Search results for: ant colonyoptimization"> <meta name="keywords" content="ant colonyoptimization"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button 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action="https://publications.waset.org/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="ant colonyoptimization"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 2</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: ant colonyoptimization</h1> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Metaheuristics Methods (GA and ACO) for Minimizing the Length of Freeman Chain Code from Handwritten Isolated Characters</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Dewi%20Nasien">Dewi Nasien</a>, <a href="https://publications.waset.org/search?q=Habibollah%20Haron"> Habibollah Haron</a>, <a href="https://publications.waset.org/search?q=Siti%20SophiayatiYuhaniz"> Siti SophiayatiYuhaniz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a comparison of metaheuristic algorithms, Genetic Algorithm (GA) and Ant Colony Optimization (ACO), in producing freeman chain code (FCC). The main problem in representing characters using FCC is the length of the FCC depends on the starting points. Isolated characters, especially the upper-case characters, usually have branches that make the traversing process difficult. The study in FCC construction using one continuous route has not been widely explored. This is our motivation to use the population-based metaheuristics. The experimental result shows that the route length using GA is better than ACO, however, ACO is better in computation time than GA. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Handwriting%20Recognition" title="Handwriting Recognition">Handwriting Recognition</a>, <a href="https://publications.waset.org/search?q=Feature%20Extraction" title=" Feature Extraction"> Feature Extraction</a>, <a href="https://publications.waset.org/search?q=Freeman%20Chain%20Code" title="Freeman Chain Code">Freeman Chain Code</a>, <a href="https://publications.waset.org/search?q=Genetic%20Algorithm%20and%20Ant%20ColonyOptimization." title=" Genetic Algorithm and Ant ColonyOptimization."> Genetic Algorithm and Ant ColonyOptimization.</a> </p> <a href="https://publications.waset.org/13608/metaheuristics-methods-ga-and-aco-for-minimizing-the-length-of-freeman-chain-code-from-handwritten-isolated-characters" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/13608/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/13608/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/13608/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/13608/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/13608/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/13608/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/13608/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/13608/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/13608/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/13608/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/13608.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">2059</span> </span> </div> </div> <div class="card publication-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> Beam Orientation Optimization Using Ant Colony Optimization in Intensity Modulated Radiation Therapy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Xi%20Pei">Xi Pei</a>, <a href="https://publications.waset.org/search?q=Ruifen%20Cao"> Ruifen Cao</a>, <a href="https://publications.waset.org/search?q=Hui%20Liu"> Hui Liu</a>, <a href="https://publications.waset.org/search?q=Chufeng%20Jin"> Chufeng Jin</a>, <a href="https://publications.waset.org/search?q=Mengyun%20Cheng"> Mengyun Cheng</a>, <a href="https://publications.waset.org/search?q=Huaqing%20Zheng"> Huaqing Zheng</a>, <a href="https://publications.waset.org/search?q=Yican%20Wu"> Yican Wu</a>, <a href="https://publications.waset.org/search?q=FDS%20Team"> FDS Team</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In intensity modulated radiation therapy (IMRT) treatment planning, beam angles are usually preselected on the basis of experience and intuition. Therefore, getting an appropriate beam configuration needs a very long time. Based on the present situation, the paper puts forward beam orientation optimization using ant colony optimization (ACO). We use ant colony optimization to select the beam configurations, after getting the beam configuration using Conjugate Gradient (CG) algorithm to optimize the intensity profiles. Combining with the information of the effect of pencil beam, we can get the global optimal solution accelerating. In order to verify the feasibility of the presented method, a simulated and clinical case was tested, compared with dose-volume histogram and isodose line between target area and organ at risk. The results showed that the effect was improved after optimizing beam configurations. The optimization approach could make treatment planning meet clinical requirements more efficiently, so it had extensive application perspective. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=intensity%20modulated%20radiation%20therapy" title="intensity modulated radiation therapy">intensity modulated radiation therapy</a>, <a href="https://publications.waset.org/search?q=ant%20colonyoptimization" title=" ant colonyoptimization"> ant colonyoptimization</a>, <a href="https://publications.waset.org/search?q=Conjugate%20Gradient%20algorithm" title=" Conjugate Gradient algorithm"> Conjugate Gradient algorithm</a> </p> <a href="https://publications.waset.org/1058/beam-orientation-optimization-using-ant-colony-optimization-in-intensity-modulated-radiation-therapy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/1058/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a 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Search results for: ant colonyoptimization