Search results for: N. Takai

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Takai</title> <meta name="description" content="Search results for: N. Takai"> <meta name="keywords" content="N. Takai"> <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 class="d-block d-lg-none navbar-toggler ml-auto" type="button" data-toggle="collapse" data-target="#navbarMenu" aria-controls="navbarMenu" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="w-100"> <div class="d-none d-lg-flex flex-row-reverse"> <form method="get" action="https://waset.org/search" class="form-inline my-2 my-lg-0"> <input class="form-control mr-sm-2" type="search" placeholder="Search Conferences" value="N. 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Takai"> <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: N. Takai</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> Non-Isolated Direct AC-DC Converter Design with BCM-PFC Circuit</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Y.%20Kobori">Y. Kobori</a>, <a href="https://publications.waset.org/search?q=L.%20Xing"> L. Xing</a>, <a href="https://publications.waset.org/search?q=H.%20Gao"> H. Gao</a>, <a href="https://publications.waset.org/search?q=N.Onozawa"> N.Onozawa</a>, <a href="https://publications.waset.org/search?q=S.%20Wu"> S. Wu</a>, <a href="https://publications.waset.org/search?q=S.%20N.%20Mohyar"> S. N. Mohyar</a>, <a href="https://publications.waset.org/search?q=Z.%20Nosker"> Z. Nosker</a>, <a href="https://publications.waset.org/search?q=H.%20Kobayashi"> H. Kobayashi</a>, <a href="https://publications.waset.org/search?q=N.%20Takai"> N. Takai</a>, <a href="https://publications.waset.org/search?q=K.%20Niitsu"> K. Niitsu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper proposes two types of non-isolated direct AC-DC converters. First, it shows a buck-boost converter with an H-bridge, which requires few components (three switches, two diodes, one inductor and one capacitor) to convert AC input to DC output directly. This circuit can handle a wide range of output voltage. Second, a direct AC-DC buck converter is proposed for lower output voltage applications. This circuit is analyzed with output voltage of 12V. We describe circuit topologies, operation principles and simulation results for both circuits. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=AC-DC%20converter" title="AC-DC converter">AC-DC converter</a>, <a href="https://publications.waset.org/search?q=Buck-boost%20converter" title=" Buck-boost converter"> Buck-boost converter</a>, <a href="https://publications.waset.org/search?q=Buck%0Aconverter" title=" Buck converter"> Buck converter</a>, <a href="https://publications.waset.org/search?q=PFC" title=" PFC"> PFC</a>, <a href="https://publications.waset.org/search?q=BCM%20PFC%20circuit." title=" BCM PFC circuit."> BCM PFC circuit.</a> </p> <a href="https://publications.waset.org/8775/non-isolated-direct-ac-dc-converter-design-with-bcm-pfc-circuit" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/8775/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/8775/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/8775/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/8775/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/8775/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/8775/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/8775/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/8775/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/8775/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/8775/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/8775.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">4792</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> A New Fuzzy DSS/ES for Stock Portfolio Selection using Technical and Fundamental Approaches in Parallel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=H.%20Zarei">H. Zarei</a>, <a href="https://publications.waset.org/search?q=M.%20H.%20Fazel%20Zarandi"> M. H. Fazel Zarandi</a>, <a href="https://publications.waset.org/search?q=M.%20Karbasian"> M. Karbasian</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A Decision Support System/Expert System for stock portfolio selection presented where at first step, both technical and fundamental data used to estimate technical and fundamental return and risk (1st phase); Then, the estimated values are aggregated with the investor preferences (2nd phase) to produce convenient stock portfolio. In the 1st phase, there are two expert systems, each of which is responsible for technical or fundamental estimation. In the technical expert system, for each stock, twenty seven candidates are identified and with using rough sets-based clustering method (RC) the effective variables have been selected. Next, for each stock two fuzzy rulebases are developed with fuzzy C-Mean method and Takai-Sugeno- Kang (TSK) approach; one for return estimation and the other for risk. Thereafter, the parameters of the rule-bases are tuned with backpropagation method. In parallel, for fundamental expert systems, fuzzy rule-bases have been identified in the form of 鈥淚F-THEN" rules through brainstorming with the stock market experts and the input data have been derived from financial statements; as a result two fuzzy rule-bases have been generated for all the stocks, one for return and the other for risk. In the 2nd phase, user preferences represented by four criteria and are obtained by questionnaire. Using an expert system, four estimated values of return and risk have been aggregated with the respective values of user preference. At last, a fuzzy rule base having four rules, treats these values and produce a ranking score for each stock which will lead to a satisfactory portfolio for the user. The stocks of six manufacturing companies and the period of 2003-2006 selected for data gathering. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Stock%20Portfolio%20Selection" title="Stock Portfolio Selection">Stock Portfolio Selection</a>, <a href="https://publications.waset.org/search?q=Fuzzy%20Rule-Base%20ExpertSystems" title=" Fuzzy Rule-Base ExpertSystems"> Fuzzy Rule-Base ExpertSystems</a>, <a href="https://publications.waset.org/search?q=Financial%20Decision%20Support%20Systems" title=" Financial Decision Support Systems"> Financial Decision Support Systems</a>, <a href="https://publications.waset.org/search?q=Technical%20Analysis" title=" Technical Analysis"> Technical Analysis</a>, <a href="https://publications.waset.org/search?q=Fundamental%20Analysis." title="Fundamental Analysis.">Fundamental Analysis.</a> </p> <a 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Search results for: N. Takai