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我正在研究一個基本上是基於知識的問答系統的項目。我的系統從用戶處獲取查詢，從維基百科下載相關文檔，去除所有html標籤並提取純文本。在此之後，它將文檔標記爲句子，然後形成術語 - 文檔（TD）矩陣（查詢也作爲句子傳遞）。這個TD矩陣然後被轉發到pLSA（概率潛伏體系分析）算法。然後，最終計算文檔（語句）向量與查詢向量之間的餘弦相似度。基於與查詢向量的相似性，最相關的句子被顯示爲答案。 （在TD Matrix的組建過程中也進行了干預）。 問題是顯示結果，但不是最相關的。我哪裏錯了？我所遵循的策略是否正確，或者其他算法是否存在可能有所幫助？ 下面我展示了一些問題和他們的答案由我的系統返回：基於知識的Q-A系統沒有給出最合適的答案
What is photosynthesis?
ANSWER 1 : The stroma contains stacks (grana) of thylakoids, which are the site of photosynthesis
ANSWER 2 : Factors leaf is the primary site of photosynthesis in plants
ANSWER 3 : Samuel Ruben and Martin Kamen used radioactive isotopes to determine that the oxygen liberated in photosynthesis came from the water
ANSWER 4 : In plants, algae and cyanobacteria, photosynthesis releases oxygen
另一個問題
What is Artificial Intelligence?
ANSWER 1 : the problem of creating 'artificial intelligence' will substantially be solved"
ANSWER 2 : 37 The leading-edge definition of artificial intelligence research is changing over time
ANSWER 3 : Stories of these creatures and their fates discuss many of the same hopes, fears and ethical concerns that are presented by artificial intelligence
ANSWER 4 : History of artificial intelligence and Timeline of artificial intelligence Thinking machines and artificial beings appear in Greek myths , such as Talos of Crete , the bronze robot of Hephaestus , and Pygmalion's Galatea 13 Human likenesses believed to have intelligence were built in every major civilization
另一個問題
Who is a hacker?
ANSWER 1 : 19 Hackers (short stories) Helba from the
ANSWER 2 : 16 Rafael Núñez aka RaFa was a notorious most wanted hacker by the FBI since 2001
ANSWER 3 : Often, this type of 'white hat' hacker is called an ethical hacker
ANSWER 4 : Hackers also commonly use port scanners
又跑
What is biology?
ANSWER 1 : Molecular biology is the study of biology at a molecular level
ANSWER 2 : molecular biology studies the complex interactions of systems of biological molecules
ANSWER 3 : The similarities and differences between cell types are particularly relevant to molecular biology
ANSWER 4 : Contents History Foundations of modern biology 2