Sentiment analysis is the computational study of how opinions, attitudes, emotions, and perspectives are expressed in language, and has been the important task of natural language processing. Sentiment analysis is hig...Sentiment analysis is the computational study of how opinions, attitudes, emotions, and perspectives are expressed in language, and has been the important task of natural language processing. Sentiment analysis is highly valuable for both research and practical applications. The focuses were put on the difficulties in the construction of sentiment classifiers which normally need tremendous labeled domain training data, and a novel unsupervised framework was proposed to make use of the Chinese idiom resources to develop a general sentiment classifier. Furthermore, the domain adaption of general sentiment classifier was improved by taking the general classifier as the base of a self-training procedure to get a domain self-training sentiment classifier. To validate the effect of the unsupervised framework, several experiments were carried out on publicly available Chinese online reviews dataset. The experiments show that the proposed framework is effective and achieves encouraging results. Specifically, the general classifier outperforms two baselines(a Na?ve 50% baseline and a cross-domain classifier), and the bootstrapping self-training classifier approximates the upper bound domain-specific classifier with the lowest accuracy of 81.5%, but the performance is more stable and the framework needs no labeled training dataset.展开更多
情感分析已经成为当今自然语言处理领域的热点问题。对于文本的自动化、半监督式的情感分析研究具有广泛的理论和实用价值。基于情感词典的情感倾向分析方法是文本情感分析的一种重要手段。然而,中文词汇在不同领域中的情感倾向不尽相同...情感分析已经成为当今自然语言处理领域的热点问题。对于文本的自动化、半监督式的情感分析研究具有广泛的理论和实用价值。基于情感词典的情感倾向分析方法是文本情感分析的一种重要手段。然而,中文词汇在不同领域中的情感倾向不尽相同,一词多义现象明显。同时,不同领域中的情感词也具有专业性、领域性的特点。针对这些问题,本文提出一种基于词向量相似度的半监督情感极性判断算法(Sentiment orientation from word vector,SO-WV),并依据该算法设计出一种跨领域的中文情感词典构建方法。实验证明,本文所设计的情感词典构建方法能有效地对情感词情感倾向进行判断。算法不仅在不同领域的情感词典建立上具有良好的可移植性,同时还具有专业性、领域性的特点。展开更多
Web 2.0时代的到来,增强了互联网络的人际交互性与即时性,使互联网逐渐成为大众普遍交流观点、抒发情感的平台,同时也积累下关于人类心理和行为的海量文本信息,可供社会科学研究之用。心理学的情绪结构理论中有关类型分类取向和维度取...Web 2.0时代的到来,增强了互联网络的人际交互性与即时性,使互联网逐渐成为大众普遍交流观点、抒发情感的平台,同时也积累下关于人类心理和行为的海量文本信息,可供社会科学研究之用。心理学的情绪结构理论中有关类型分类取向和维度取向的理论成果,为信息科学研究中的情感词库、情感分析工具的开发和发展,提供了心理科学基础。利用在线文本情感分析技术研究大众社会心理,拓宽了包括心理学在内的社会科学研究范畴;同时社会科学也为在线文本情感分析研究提供了新的研究命题和理论框架。二者相辅相成,共同推动计算社会科学的发轫与发展。展开更多
基金Projects(61170156,60933005)supported by the National Natural Science Foundation of China
文摘Sentiment analysis is the computational study of how opinions, attitudes, emotions, and perspectives are expressed in language, and has been the important task of natural language processing. Sentiment analysis is highly valuable for both research and practical applications. The focuses were put on the difficulties in the construction of sentiment classifiers which normally need tremendous labeled domain training data, and a novel unsupervised framework was proposed to make use of the Chinese idiom resources to develop a general sentiment classifier. Furthermore, the domain adaption of general sentiment classifier was improved by taking the general classifier as the base of a self-training procedure to get a domain self-training sentiment classifier. To validate the effect of the unsupervised framework, several experiments were carried out on publicly available Chinese online reviews dataset. The experiments show that the proposed framework is effective and achieves encouraging results. Specifically, the general classifier outperforms two baselines(a Na?ve 50% baseline and a cross-domain classifier), and the bootstrapping self-training classifier approximates the upper bound domain-specific classifier with the lowest accuracy of 81.5%, but the performance is more stable and the framework needs no labeled training dataset.
文摘情感分析已经成为当今自然语言处理领域的热点问题。对于文本的自动化、半监督式的情感分析研究具有广泛的理论和实用价值。基于情感词典的情感倾向分析方法是文本情感分析的一种重要手段。然而,中文词汇在不同领域中的情感倾向不尽相同,一词多义现象明显。同时,不同领域中的情感词也具有专业性、领域性的特点。针对这些问题,本文提出一种基于词向量相似度的半监督情感极性判断算法(Sentiment orientation from word vector,SO-WV),并依据该算法设计出一种跨领域的中文情感词典构建方法。实验证明,本文所设计的情感词典构建方法能有效地对情感词情感倾向进行判断。算法不仅在不同领域的情感词典建立上具有良好的可移植性,同时还具有专业性、领域性的特点。
