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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/35277
標題: | 以商品驅動之推薦方法 Item-triggered Recommendation |
作者: | Koung-Lung Lin 林光龍 |
指導教授: | 許永真(Jane Yung-jen Hsu) |
共同指導教授: | 歐陽彥正(Yen-jen Oyang) |
關鍵字: | 推薦系統,支撐向量機,普適提演算法,稀少類別分類,商品驅動,消費者驅動,未請求商品, recommender system,support vector machine,boosting algorithm,rare class classification,item-triggered,customer-triggered,unsought product, |
出版年 : | 2005 |
學位: | 博士 |
摘要: | Recommendation research has achieved successful results in many application areas. However, for supermarkets, since the transaction data is extremely skewed in the sense that a large portion of sales is concentrated in a small number of best selling items, collaborative filtering based customer-triggered recommenders usually recommend hot sellers while rarely recommend cold sellers. But recommenders are supposed to provide better campaigns for cold sellers to increase sales.
In this thesis, we propose an alternative ``item-triggered' recommendation to identify potential customers for cold sellers. In item-triggered recommendation, the recommender system will return a ranked list of customers who are willing to buy a given item. This problem can be formulated as a problem of classifier learning, but due to the skewed distribution of the transaction data, we need to solve the rare class problem, where the number of negative examples is much larger than the positive ones. We present a boosting algorithm to train an ensemble of SVM classifiers to solve the rare class problem and compare the algorithm with its variants. We apply our algorithm to a real-world supermarket database and use the area under the ROC curve (AUC) metric to evaluate the quality of the output ranked lists. Experimental results show that our algorithm can improve from a baseline approach by about twenty-three percent in terms of the AUC metric for cold sellers which is as low as 0.64\% of customers have ever purchased. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/35277 |
全文授權: | 有償授權 |
顯示於系所單位: | 資訊工程學系 |
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