Multi-granular document-level sentiment topic analysis for online reviews

Applied Intelligence - It is key to identify both sentiment and topic for well understanding and managing social media data such as online reviews and microblogs. This paper studies a robust and...     

基于在线评论的情感分析方法及应用

互联网以及电子商务的快速发展,使得网络成为人们交流和沟通的公共平台.消费者在网络平台生成的大量在线评论信息产生广泛影响,并引起专家学者的积极关注,基于在线评论进行的情感分析相关研究也不断发展.鉴于此,重点关注基于在线评论的情感分析方法及其应用,在对上述内容概述的基础上分析和思考现有研究存在的问题,并指出未来可能的研究方向和内容.     

Riding the tide of sentiment change: sentiment analysis with evolving online reviews

The last decade has seen a rapid growth in the volume of online reviews. A great deal of research has been done in the area of opinion mining, aiming at analyzing the sentiments expressed in those reviews towards products and services. Most of the such work focuses on mining opinions from a collection of reviews posted during a particular period, and does not consider the change in sentiments when the collection of reviews evolve over time. In this paper, we fill in this gap, and study the problem of developing adaptive sentiment analysis models for online reviews. Given the success of latent semantic modeling techniques, we propose two adaptive methods to capture the evolving sentiments. As a case study, we also investigate the possibility of using the extracted adaptive patterns for sales prediction. Our proposal is evaluated on an IMDB dataset consisting of reviews of selected movies and their box office revenues. Experimental results show that the adaptive methods can capture sentiment changes arising from newly available reviews, which helps greatly improve the prediction accuracy.     

面向旅游在线评论情感词典构建方法

旅游在线评论情感分析的基础是情感词典的构建。在领域情感词典构建过程中,通常仅使用词频作为筛选种子词集的标准,而并未考虑其内部词语的关联程度,这会导致种子词集聚类效果不明显,进而影响情感词语归类精度。因此,基于词向量模型,提出一种情感词典种子词集筛选方法。该方法将情感词语以向量形式表征并计算词向量间距离,形成种子词集的筛选标准和分类依据,再通过类别判断形成在线评论的情感词典。最后,构建了山岳型旅游景区在线评论情感词典,并通过对比实验验证了方法的有效性,对提高情感词语归类精度和旅游在线评论情感词典的构建起到了积极的作用。     

Text feature selection for sentiment classification of Chinese online reviews

In order to meet the requirement of customised services for online communities, sentiment classification of online reviews has been applied to study the unstructured reviews so as to identify users’ opinions on certain products. The purpose of this article is to select features for sentiment classification of Chinese online reviews with techniques well performed in traditional text classification. First, adjectives, adverbs and verbs are identified as the potential text features containing sentiment information. Then, four statistical feature selection methods, such as document frequency (DF), information gain (IG), chi-squared statistic (CHI) and mutual information (MI), are adopted to select features. After that, the Boolean weighting method is applied to set feature weights and construct a vector space model. Finally, a support vector machine (SVM) classifier is employed to predict the sentiment polarity of online reviews. Comparative experiments are conducted based on hotel online reviews in Chinese. The results indicate that the highest accuracy of the sentiment classification of Chinese online reviews is achieved by taking adjectives, adverbs and verbs together as the feature. Besides that, different feature selection methods make distinct performances on sentiment classification, as DF performs the best, CHI follows and IG ranks the last, whereas MI is not suitable for sentiment classification of Chinese online reviews. This conclusion will be helpful to improve the accuracy of sentiment classification and be useful for further research.     

EOSentiMiner: an opinion-aware system based on emotion ontology for sentiment analysis of Chinese online reviews

With the growing availability and popularity of online reviews, consumers' opinions towards certain products or services are generated and spread over the Internet; sentiment analysis thus arises in response to the requirement of opinion seekers. Most prior studies are concerned with statistics-based methods for sentiment classification. These methods, however, suffer from weak comprehension of text-based messages at semantic level, thus resulting in low accuracy. We propose an ontology-based opinion-aware framework – EOSentiMiner – to conduct sentiment analysis for Chinese online reviews from a semantic perspective. The emotion space model is employed to express emotions of reviews in the EOSentiMiner, where sentiment words are classified into two types: emotional words and evaluation words. Furthermore, the former contains eight emotional classes, and the latter is divided into two opinion evaluation classes. An emotion ontology model is then built based on HowNet to express emotion in a fuzzy way. Based on emotion ontology, we evaluate some factors possibly affecting sentiment classification including features of products (services), emotion polarity and intensity, degree words, negative words, rhetoric and punctuation. Finally, sentiment calculation based on emotion ontology is proposed from sentence level to document level. We conduct experiments by using the data from online reviews of cellphone and wedding photography. The result shows the EOSentiMiner outperforms baseline methods in term of accuracy. We also find that emotion expression forms and connection relationship vary across different domains of review corpora.     

Unsupervised method for sentiment analysis in online texts

In recent years, the explosive growth of online media, such as blogs and social networking sites, has enabled individuals and organizations to write about their personal experiences and express opinions. Classifying these documents using a polarity metric is an arduous task. We propose a novel approach to predicting sentiment in online textual messages such as tweets and reviews, based on an unsupervised dependency parsing-based text classification method that leverages a variety of natural language processing techniques and sentiment features primarily derived from sentiment lexicons. These lexicons were created by means of a semiautomatic polarity expansion algorithm in order to improve accuracy in specific application domains. The results obtained for the Cornell Movie Review, Obama-McCain Debate and SemEval-2015 datasets confirm the competitive performance and the robustness of the system.     

Building emotional dictionary for sentiment analysis of online news

Sentiment analysis of online documents such as news articles, blogs and microblogs has received increasing attention in recent years. In this article, we propose an efficient algorithm and three pruning strategies to automatically build a word-level emotional dictionary for social emotion detection. In the dictionary, each word is associated with the distribution on a series of human emotions. In addition, a method based on topic modeling is proposed to construct a topic-level dictionary, where each topic is correlated with social emotions. Experiment on the real-world data sets has validated the effectiveness and reliability of the methods. Compared with other lexicons, the dictionary generated using our approach is language-independent, fine-grained, and volume-unlimited. The generated dictionary has a wide range of applications, including predicting the emotional distribution of news articles, identifying social emotions on certain entities and news events.     

Applying uncertainty theory into the restaurant recommender system based on sentiment analysis of online Chinese reviews

World Wide Web - In this study, we utilize users’ reviews to a restaurant recommender system to further explore users’ opinions by the proposed recommender approach. Considering the...     

面向票房预测的影评情感可视分析

针对电影上映前后影评情感会发生较大变化,导致电影行业分析者分析影评情感对票房预测的影响具有一定难度的问题,提出一种基于影评情感类型与强度的自回归票房预测模型,并构建了面向票房预测的影评情感可视分析系统MRS-VIS。系统基于时空特征,提出一种空间插值可视化视图,并结合多种可视化经典视图,帮助电影行业分析者对一部电影在上映前后的影评情感进行多角度探索与分析。系统支持分析者在情感分析的基础上,通过交互操作对情感类型与强度进行编辑,进一步提高票房预测模型的准确性和可靠性。案例分析结果表明,提出的模型和构建的系统可以有效帮助电影行业分析者分析影评情感类型和修正情感。     

Hierarchical classification in text mining for sentiment analysis of online news

Sentiment analysis in text mining is a challenging task. Sentiment is subtly reflected by the tone and affective content of a writer’s words. Conventional text mining techniques, which are based on keyword frequencies, usually run short of accurately detecting such subjective information implied in the text. In this paper, we evaluate several popular classification algorithms, along with three filtering schemes. The filtering schemes progressively shrink the original dataset with respect to the contextual polarity and frequent terms of a document. We call this approach “hierarchical classification”. The effects of the approach in different combination of classification algorithms and filtering schemes are discussed over three sets of controversial online news articles where binary and multi-class classifications are applied. Meanwhile we use two methods to test this hierarchical classification model, and also have a comparison of the two methods.     

细粒度情感分析的酒店评论研究

酒店在线评论细粒度挖掘具有重要研究意义.以酒店在线评论具体特征属性和情感分类为研究目标,应用Apfiori算法和情感词典匹配算法,对重庆雾都宾馆在线评论数据深入挖掘,挖掘出用户最关注的酒店十大特征和满意度结果,进一步挖掘出商务出差等五种不同出游类型人最关注的酒店五大特征和满意度结果.这种方法不仅能对酒店领域评论进行分析,同样能够应用于其他领域.     

基于主题情感句的汉语评论文倾向性分析*

提出一种基于主题情感句的汉语评论文倾向性分析方法.根据评论文的特点,采用一种基于n元词语匹配的方法识别主题,通过对比与主题的语义相似度和进行主客观分类抽取出候选主题情感句,计算其中相似度最高的若干个句子的情感倾向,将其平均值作为评论文的整体倾向.基于主题情感句的评论文倾向性分析方法避免了进行篇章结构分析,排除了与主题无...     

Generate domain-specific sentiment lexicon for review sentiment analysis

Multimedia Tools and Applications - Lexicon-based approaches for review sentiment analysis have attracted significant attention in recent years. Lots of sentiment lexicon generation methods have...     

维吾尔语情感分类算法

情感分类是一项具有实用价值的分类技术。目前英语和汉语的情感分类的研究比较多,而针对维吾尔语的研究较少。以n-gram模型作为不同的文本表示特征,以互信息、信息增益、CHI统计量和文档频率作为不同的特征选择方法,选择不同的特征数量,以Naǐve Bayes、ME（最大熵）和SVM（支持向量机）作为不同的文本分类方法,分别进行了维吾尔语情感分类实验,并对实验结果进行了比较,结果表明：采用UniGrams特征表示方法、在5 000个特征数量和合适的特征选择函数,ME和SVM对维吾尔语情感分类能取得较好的效果。     

A survey on sentiment detection of reviews

The sentiment detection of texts has been witnessed a booming interest in recent years, due to the increased availability of online reviews in digital form and the ensuing need to organize them. Till to now, there are mainly four different problems predominating in this research community, namely, subjectivity classification, word sentiment classification, document sentiment classification and opinion extraction. In fact, there are inherent relations between them. Subjectivity classification can prevent the sentiment classifier from considering irrelevant or even potentially misleading text. Document sentiment classification and opinion extraction have often involved word sentiment classification techniques. This survey discusses related issues and main approaches to these problems.     

基于加权融合字词向量的中文在线评论情感分析

随着社交网络平台的广泛使用,涌现出大量蕴涵丰富情感信息的在线评论文本,分析评论中表达的情感对企业、平台等具有重要意义。为了解决目前针对在线评论短文本情感分析中存在特征提取能力弱以及忽略短文本本身情感信息的问题,提出一种基于文本情感值加权融合字词向量表示的模型——SVW-BERT模型。首先,基于字、词级别向量融合表示文本向量,最大程度获取语义表征,同时考虑副词、否定词、感叹句及疑问句对文本情感的影响,通过权值计算得到文本的情感值,构建情感值加权融合字词向量的中文短文本情感分析模型。通过网络平台在线评论数据集对模型的可行性和优越性进行验证。实验结果表明,字词向量融合特征提取语义的能力更强,同时情感值加权句向量考虑了文本本身蕴涵的情感信息,达到了提升情感分类能力的效果。     

基于网络新闻评论的四度用户影响力分析模型

由于网络新闻评论的开放性和传播性,经常引发舆论事件,为能正确引导社会舆论,需要重点关注某些具有较高影响力的用户.针对已有方法未能全面考虑表征网络新闻评论用户影响力的因素,提出四度用户影响力分析模型——FDRank(four-degree influence rank),通过综合考虑用户的评论内容、评论情感值、自身质量以...     

Classification of sentiment reviews using n-gram machine learning approach

With the ever increasing social networking and online marketing sites, the reviews and blogs obtained from those, act as an important source for further analysis and improved decision making. These reviews are mostly unstructured by nature and thus, need processing like classification or clustering to provide a meaningful information for future uses. These reviews and blogs may be classified into different polarity groups such as positive, negative, and neutral in order to extract information from the input dataset. Supervised machine learning methods help to classify these reviews. In this paper, four different machine learning algorithms such as Naive Bayes (NB), Maximum Entropy (ME), Stochastic Gradient Descent (SGD), and Support Vector Machine (SVM) have been considered for classification of human sentiments. The accuracy of different methods are critically examined in order to access their performance on the basis of parameters such as precision, recall, f-measure, and accuracy.     

Integrated BERT embeddings,BiLSTM-BiGRU and 1-D CNN model for binary sentiment classification analysis of movie reviews

Now a days, understanding the review of the articles, movies are the major issue due to different sentiment present on them. Reviews are short texts which expressing the opinion of the writer on certain texts and express the sentiment related to them. In the recent past, many researchers pay attention to sentiment analysis. In this research work, a novel binary sentiment classification is proposed to classify either positive or negative sentiment. First, the Bidirectional Encoder Representations from Transformers (BERT) embeddings are introduced to tokenize and preprocess the input text. The Bidirectional Long Short-Term Memory (BiLSTM) – Bidirectional Gated Recurrent Unit (BiGRU) and 1-D Convolutional Neural Network (CNN) model is integrated and proposed for sentiment classification. The proposed integrated BERT Embedding and BiLSTM-BiGRU is applied to extract the specified target and self-attention layer is added for better understanding of context, further 1-D CNN along with few other deep learning layers, the sentiment is classified for the selected IMDB movie review dataset. The proposed BERT Embedding + BiLSTM-BiGRU + self-attention and 1-D CNN model is trained and validated with the IMDB movie review dataset. From the simulation, it is found that the testing accuracy and AUC (Area Under the Curve) values are 93.89% and 0.9828 respectively. The performance of the proposed integrated BERT Embedding + BiLSTM-BiGRU+ self-attention and 1-D CNN model is compared with existing models and it is observed that it outperforms better in binary sentiment classification analysis.