Beijing Daxue Xuebao (Ziran Kexue Ban)/Acta Scientiarum Naturalium Universitatis Pekinensis

Wang Fenjua

Beijing Daxue xuebao. Ziran kexue ban

Case Study of Wuhan Dust Pollution in May 2014

2014年5月武汉粉尘污染案例研究

In order to explore the historical annual heavily PM2.5 polluted days and their health loss, the study constructs a daily air quality dataset for 31 provinces of China from 2001 to 2013. Further, it evaluates the health impacts especially the premature death and the economic loss due to the heavy PM2.5 pollution days of each year since 2001 for each province, by applying the latest results of dose-response in epidemiologic studies and taking account of the age structure of population as well as valuation approaches. The result shows that since 2001, heavily polluted situation(above the defined threshold, here the 2nd grade of air quality standard is applied for practical reason) for PM2.5 occurred in 71 percent of the provinces on a yearly basis. Although the average concentration of heavily polluted days did not have much variations during the thirteen years and the trend went down during 2001–2012 in terms of occurrence, heavily polluted situation increased dramatically in frequency in 2013. As a result, the proportion of heavily polluted days in 2013 was the highest during 2001–2013. It is estimated that over 65000 premature deaths was caused by heavy PM2.5 pollution days in 2013, which can be assessed as the 28.1 billion Yuan loss in economic term, 54 percent of the total economic loss in these thirteen years equivalently. The surge of economic loss in 2013 was attributed to the lasting heavy PM2.5 pollution in January 2013 and eight provinces in eastern and middle China.

Mu Qua

Assessment of the Trend of Heavy PM_(2.5) Pollution Days and Economic Loss of Health Effects during 2001–2013

2001-2013年期间重PM_(2.5)污染日趋势及健康效应经济损失评估

Cilin and Chinese Concept Dictionary are used as dictionary resources in many NLP applications. The authors study some strategies on Chinese synonyms extraction according to key word of the infobox in Baidubaike and HTML tag of the web page in Zdic. Meanwhile, DIPRE(Dual Iterative Pattern Relation Expansion) is applied to discover high credible patterns and synonymous instances in Encyclopedia corpora. Extensive experimental evaluation demonstrates that proposed strategies outperform the NLPCC 2012 evaluation results. A sophisticated synonym dictionary is built with manually proofreading for noun part of the Grammatical Knowledge-Base of Contemporary Chinese, which would make contributions to perfect the semantic systems of the Grammatical Knowledge-base of Contemporary Chinese.

Song Wenji

Multi-strategies Extraction of Chinese Synonyms

中文同义词的多策略提取

Based on the annotation of discourse connective in Chinese Discourse Treebank, especially the annotation of the connective and its relation classification. The authors extract syntax, lexical and position features of automatic syntax tree and standard syntax tree, and use supervised method to recognize and classify connective. Experimental results show that connective recognition F1-measure is 69.2%, and connective classification accuracy is 89.1%.

LI Yancu

Automatic Recognition and Classification on Chinese Discourse Connective

中文话语连接词的自动识别与分类

The authors propose a simple but effective distance based method to identify forms with similar layouts by measuring the user filled-in data, preprinted data and dithering data. The proposed method utilizes three kinds of weight components to mitigate the impact of randomness of user filled-in data, consistency of similar layouts and position dithering respectively. Experimental results show that the proposed method can achieve more than 90% classification accuracy on a series of data sets, which is significantly better than the results of the state-of-the-art method.

Wang Simen

A Study on Classification of Forms with Similar Layout

相似布局表单分类研究

Based on the efficiency and effectiveness issue of traditional simiar spatial textual objects retrieval, a semantic aware strategy which can effectively and efficiently retrieve the top-k similar spatial textal objects is proposed. The efficient retrieval strategy which is based on spatial textual objects is built on a common framework of spatial object retrieval, and it can satisfy the efficiency and effectiveness issues of users. Extensive experimental evaluation demonstrates that the performance of the proposed method outperforms the state-of-the-art approach.

GU Yanhu

Similar Spatial Textual Objects Retrieval Strategy

相似空间文本对象检索策略

Existing sentiment analysis focus on the emotional tendency, which are lack of detailed description of all kinds of emotions, they can't intuitively reflect the emotional change of social groups. An emotional analysis method based on the combination of dependency parsing and artificial tagging was proposed. Facial expression animation to present emotions analysis was realized. The microblog crowd's emotion in different areas for different social events was visualized. The experimental results show that the model could closely and effectively simulate the crowd emotion, and it could provide a new way of the analysis of network public opinion based on large data.

Liu Cuijua

Research on the Visualization Method of Social Crowd Emotion Based on Microblog Text Data Analysis

基于微博文本数据分析的社会群体情绪可视化方法研究

This paper presents an innovative method to align two glyph contours with three steps. First, 2D Bezier curve control points of glyph contours of each character are expanded into 3D space. Second, a Gaussian Mixture Model(GMM) is constructed using this 3D point set. Finally, the authors establish alignment by minimizing the Euclidean Distance(L2) between two GMMs and then apply transformation accordingly. Expansion to 3D space helps make use of inherent constraints of Chinese calligraphy beyond 2D coordinates. The advantage of using Gaussian Mixture Model is to maintain both the overall shape property and the local writing features during the alignment process. Experiments results verify the feasibility and effectiveness of proposed method and it performs well for both single stroke and whole character.

Liu Yingbi

Chinese Calligraphy Alignment Based on 3D Point Set Registration

基于三维点集配准的中文书法对齐

Entity linking is the process of linking name mentions in text with their referent entities in a knowledge base. This paper tackles this task by proposing an approach based on topic-sensitive random walk with restart. Firstly, the context information of mentions is used to expand mentions and search the candidate entities in Wikipedia knowledge base for mentions. Secondly, graph can be constructed in accordance with the intermediate result in the pre step. Finally, the topic-sensitive random walk with restart model is used to rank the candidate entities and choose the top 1 as the linked entity. Experimental results show that proposed approach on KBP2014 data set gets F score 0.623 which is higher than every other systems' mentioned in this paper. The proposed approach can improve the entity linking system's performance.

LI Maoli

An Entity Linking Approach Based on Topic-Sensitive Random Walk with Restart

一种基于主题敏感重启随机游走的实体链接方法

This paper proposes a method to construct Bilingual Movie Knowledge Graph(BMKG). The authors first builds Bilingual Movie Ontology(BMO) through a semi-automatic way, and aligns each data source with it in order to ensure semantic consistency of heterogeneous data sources. For entity linking, the proposed method makes best use of the field characteristics and calculate entity similarity based on both Word2 Vec and TFIDF models, which greatly improve entity linking. For entity matching, a similarity flooding based algorithm is proposed, which utilizes the intrinsic links between the movie data sources, addressing the problem of similarity computation between cross-lingual entities. The experiment results show that the entity matching precision is over 90% when the threshold is above 0.75. In addition, a movie knowledge graph sharing platform is also built to provide open data access and query interface.

ISSN	0479-8023
h-index	32

Publication Information	Publisher: Peking University，Publishing cycle: ，Journal Type: journal，Open Access Journals: No
Basic data	Year of publication: 2001，Proportion of original research papers: 0.00%，Self Citation Rate:N.A.， Gold OA Rate: 0.00%

Beijing Daxue Xuebao (Ziran Kexue Ban)/Acta Scientiarum Naturalium Universitatis Pekinensis

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