本文中，我們利用混合模型的概念再潛在狄利克雷分布上，得到一個簡化的模型。我們嘗試利用此模型來討論流行音樂歌詞的演變，並用文化維度的觀念進行討論。

In this paper, we use the concept of a hybrid model to potentially derive a simplified model on the Dirichlet distribution. We try to use this model to discuss the evolution of popular music lyrics and discuss them with the concept of cultural dimensions.

目錄
1 緒論1
1.1 研究背景----------------------------1
1.2 研究動機與目的-----------------------1
2 文獻回顧------------------------------2
2.1 文字探勘相關介紹---------------------2
2.2 LDA -------------------------------2
2.3 流行音樂相關介紹---------------------3
2.4 文化維度及廣告訴求--------------------3
2.5 KKBOX ------------------------------8
2.6 R 語言------------------------------8
3 模型和方法-----------------------------9
3.1 模型介紹-----------------------------9
3.1.1 以混合模型探討LDA ----------------- 9
3.2 演算法-------------------------------11
4 KKBOX 排行榜分析------------------------12
4.1 研究結果------------------------------13
5 結論與建議-------------------------------28
Reference------------------------------- 29

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