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Title: 基於翻譯序列推薦模型於跨領域推薦系統之強化方法
Employing Translation-based Recommendation for Improving Cross-domain Recommendation Performance
Authors: 王均捷
Wang, Chun-Chieh
Contributors: 蔡銘峰
Tsai, Ming-Feng
Wang, Chun-Chieh
Keywords: 推薦系統
recommendation system
cross-domain recommendation
graph learning
Date: 2021
Issue Date: 2021-10-01 10:06:01 (UTC+8)
Abstract: 若我們有足夠多的歷史資料,就可以用很多不同的方法去建立一個聰明的推薦系統。但在某些情況下,比如一個新的社交媒體平台或電商平台上線時,我們沒有足夠的使用者物品互動資料來建構出好的推薦系統。其中一個強化跨領域推薦(cross-domain recommendation)的解決方案,是藉由將「來源領域(資訊含量較多之領域)」的資料加入「目標領域(資訊量相對較少的領域)」來提升資訊量,然後對「目標領域」進行推薦。

本論文採用圖形學習表示演算法,結合改良並善用翻譯序列推薦模型(Translation-based Recommendation,TransRec)的推薦優勢,特化模型訓練時採樣方法、改變翻譯序列合併方法,並引入貝氏個人化推薦(Bayesian Personalized Ranking,BPR)中負採樣(negative sampling)的概念,訓練得到推薦系統任務導向之表示向量,藉此改善推薦結果。

本研究旨在通過改良後的翻譯序列推薦模型「TransRecCross」來強化跨領域推薦效果。驗證本論文的新方法時,使用了 Amazon Review 系列資料集中的其中四個,並在論文最後比較了加入不同比例的來源領域資料後的推薦結果,以驗證本論文提出之方法的可靠程度。
There are plenty of ways to apply an intelligent domain-specific recommendation system if we have an enormous amount of data. Unfortunately, in some scenarios
like running a new social media platform or online store, we do not have enough user-item interactions data to build a sound recommendation system. One of the solutions is to apply cross-domain recommendation techniques: we can increase the amount of information by gathering the user-item interaction information from the "source domain" into the "target domain," and then implement the
recommendation system based on the "target domain."

This thesis adopts graph learning representation algorithm with extending the advantages of TransRec (Translation-based Recommendation): specializes the sampling method, changes the translating method, and then applies the negative sampling concept of BPR (Bayesian Personalized Ranking), then train and get the recommendation-oriented representation vectors to improve the recommendation system performance. This study aims to improve the cross-domain recommendation performance via a reformed translation-based recommendation model named "TransRecCross." In our experiments, comprehensive comparisons conducted on four datasets from Amazon Review have verified the effectiveness of the proposed TransRecCross.
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Description: 碩士
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Data Type: thesis
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