qq_40658408的博客

不是好资源不上传的原则，清华大学李航的著作《统计学习方法》，机器学习爱好者入门必读书目之一，全面系统地介绍了机器学习的主要方法，尤其是监督学习方法

多层感知器是一种多层前馈神经网络 ,常用的快速训练算法有共轭梯度法、拟牛顿法。通 过模式分类实验对这两种算法和 BP算法进行比较 ,并由试验数据得出这几种算法的复杂性、可靠 性 ,以及由算法产生的多层感知器的泛化能力。

Question answering (QA) has become a popular way for humans to access billion-scale knowledge bases. Unlike web search, QA over a knowledge base gives out accurate and concise results, provided that natural language questions can be understood and mapped precisely to structured queries over the knowledge base. The challenge, however, is that a human can ask one question in many different ways. Previous approaches have natural limits due to their representations: rule based approaches only understand a small set of “canned” questions, while keyword based or synonym based approaches cannot fully understand the questions. In this paper, we design a new kind of question representation: templates, over a billion scale knowledge base and a million scale QA corpora. For example, for questions about a city’s population, we learn templates such as What’s the population of $city?, How many people are there in $city?. We learned 27 million templates for 2782 intents. Based on these templates, our QA system KBQA effectively supports binary factoid questions, as well as complex questions which are composed of a series of binary factoid questions. Furthermore, we expand predicates in RDF knowledge base, which boosts the coverage of knowledge base by 57 times. Our QA system beats all other state-of-art works on both effectiveness and efficiency over QALD benchmarks.