Please wait a minute...
Advanced Search
数据分析与知识发现  2020, Vol. 4 Issue (8): 15-27     https://doi.org/10.11925/infotech.2096-3467.2020.0384
     综述评介 本期目录 | 过刊浏览 | 高级检索 |
面向学术文献的作者名消歧方法研究综述*
沈喆1,王毅1,姚毅凡1,成颖1,2()
1南京大学信息管理学院 南京 210023
2山东师范大学文学院 济南 250014
Author Name Disambiguation Techniques for Academic Literature: A Review
Shen Zhe1,Wang Yi1,Yao Yifan1,Cheng Ying1,2()
1School of Information Management, Nanjing University, Nanjing 210023, China
2School of Chinese Language and Literature, Shandong Normal University, Jinan 250014, China
全文: PDF (815 KB)   HTML ( 12
输出: BibTeX | EndNote (RIS)      
摘要 

【目的】 分析并评述面向学术文献的作者名消歧的相关工作,为该领域的后续研究提供借鉴。【文献范围】 在Web of Science、谷歌学术、中国知网和万方数据库中检索2016年1月1日至2020年3月28日的相关研究,共选择51篇文献进行综述。【方法】 以作者名消歧的流程为主线系统梳理各项研究成果,分类总结特征提取、特征表示以及模型训练与预测等主题的研究,并针对研究中的共性问题进行多维度的讨论。【结果】在特征表示方面,相较于2016年之前的研究,基于图、概率和混合模型的方法优化了复杂特征的相似度计算。在模型训练与预测方面,基于机器学习的算法仍需要提高效率与泛化能力,使其能够满足大型数据库和增量消歧的需求。多数研究尚未解决数据中存在的诸如训练数据不均、特征数据缺失、一人多名等问题。【局限】由于各项研究的实证数据差异较大,未能对不同方法进行量化比较。【结论】提出从多源数据融合、用户干预以及预训练模型的引入等视角开展后续研究的思路。

服务
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章
沈喆
王毅
姚毅凡
成颖
关键词 作者名消歧姓名歧义重名消歧文献数据库    
Abstract

Abstract: [Objective] This paper reviews research on author name disambiguation techniques for the academic literature, aiming to provide references for future studies. [Coverage] A total of 51 papers published between January 1, 2016 to March 28 , 2020 were retrieved from the Web of Science, Google Scholar, CNKI and Wanfang Database. [Methods] First, we explored findings from these papers based on the process of author name disambiguation. Then, we summarized techniques like feature extraction, feature representation, model training and prediction. Finally, we discussed common issues facing these research multi-dimensionally. [Results] Graph-based and probabilistic methods, as well as hybrid feature representation models improved the calculation of complicated network features. We need to optimize machine-learning models' efficiency and generalization ability to finish tasks with large databases and incremental disambiguation. Most research did not address issues like unbalanced training data, missing feature data, and authors using different names. [Limitations] Due to the differences in empirical data, we did not carry out quantitative comparison among different methods. [Conclusions] Our study proposed multi-source data fusion, user intervention, and pre-trained models to improve author name disambiguation.

Key wordsAuthor Name Disambiguation    Name Ambiguity    Same Name Disambiguation    Literature Database
收稿日期: 2020-05-05      出版日期: 2020-06-05
ZTFLH:  TP393  
基金资助:*本文系国家社会科学基金重大项目"中国近现代文学期刊全文数据库建设与研究(1872-1949)"的研究成果之一(17ZDA276)
通讯作者: 成颖     E-mail: chengy@nju.edu.cn
引用本文:   
沈喆, 王毅, 姚毅凡, 成颖. 面向学术文献的作者名消歧方法研究综述*[J]. 数据分析与知识发现, 2020, 4(8): 15-27.
Shen Zhe, Wang Yi, Yao Yifan, Cheng Ying. Author Name Disambiguation Techniques for Academic Literature: A Review. Data Analysis and Knowledge Discovery, 2020, 4(8): 15-27.
链接本文:  
http://manu44.magtech.com.cn/Jwk_infotech_wk3/CN/10.11925/infotech.2096-3467.2020.0384      或      http://manu44.magtech.com.cn/Jwk_infotech_wk3/CN/Y2020/V4/I8/15
Fig.1  AND系统框架
Fig.2  AND特征使用频率
[1] Haak L L, Fenner M, Paglione L, et al. ORCID: A System to Uniquely Identify Researchers[J]. Learned Publishing, 2012,25(4):259-264.
doi: 10.1087/20120404
[2] Smalheiser N R, Torvik V I. Author Name Disambiguation[J]. Annual Review of Information Science & Technology, 2009,43(1):1-43.
[3] Elliot S. Survey of Author Name Disambiguation: 2004 to 2010[J/OL]. Library Philosophy and Practice, [2004-04-10]. https://digitalcommons.unl.edu/libphilprac/443/
[4] Ferreira A A, Gongalves M A, Laender A H F. A Brief Survey of Automatic Methods for Author Name Disambiguation[J]. ACM SIGMOD Record, 2012,41(2):15-26.
[5] Hussain I, Asghar S. A Survey of Author Name Disambiguation Techniques: 2010-2016[J]. The Knowledge Engineering Review, 2017,32:e22.
doi: 10.1017/S0269888917000182
[6] 付媛, 朱礼军, 韩红旗. 姓名消歧方法研究进展[J]. 情报工程, 2016,2(1):53-58.
[6] ( Fu Yuan, Zhu Lijun, Han Hongqi. A Survey of Name Disambiguation[J]. Technology Intelligence Engineering, 2016,2(1):53-58.)
[7] Sanyal D K, Bhowmick P K, Das P P. A Review of Author Name Disambiguation Techniques for the PubMed Bibliographic Database[J]. Journal of Information Science, 2019(3):1-28.
[8] 单嵩岩, 吴振新. 面向作者消歧和合作预测领域的作者相似度算法述评[J]. 东北师大学报(自然科学版), 2019,51(2):71-80.
[8] ( Shan Songyan, Wu Zhenxin. Review on the Author Similarity Algorithm in the Field of Author Name Disambiguation and Research Collaboration Prediction[J]. Journal of Northeast Normal University(Natural Science Edition), 2019,51(2):71-80.)
[9] Delgado A D, Montalvo S, Martinez-Unanue R, et al. A Survey of Person Name Disambiguation on the Web[J]. IEEE Access, 2018,6:59496-59514.
doi: 10.1109/Access.6287639
[10] 柯昊, 李天, 周悦, 等. 数据缺失时基于BP神经网络的作者重名辨识研究[J]. 情报学报, 2018,37(6):600-609.
[10] ( Ke Hao, Li Tian, Zhou Yue, et al. Author Name Disambiguation Using BP Neural Networks Under Missing Data[J]. Journal of the China Society for Scientific and Technical Information, 2018,37(6):600-609.)
[11] Zhang S Y, E X H, Pan T. A Multi-Level Author Name Disambiguation Algorithm[J]. IEEE Access, 2019,7:104250-104257.
doi: 10.1109/Access.6287639
[12] 尚玉玲, 曹建军, 李红梅, 等. 基于合作作者与隶属机构信息的同名排歧方法[J]. 计算机科学, 2018,45(11):220-225, 260.
[12] ( Shang Yuling, Cao Jianjun, Li Hongmei, et al. Co-author and Affiliate Based Name Disambiguation Approach[J]. Computer Science, 2018,45(11):220-225,260.)
[13] Ding X, Zhang H, Guo X Y. An Unsupervised Framework for Author-paper Linking in Bibliographic Retrieval System[C]// Proceedings of the 14th International Conference on Semantics, Knowledge and Grids (SKG). 2018: 152-159.
[14] Hazra R, Saha A, Deb S B, et al. An Efficient Technique for Author Name Disambiguation[C]// Proceedings of 2016 IEEE International Conference on Current Trends in Advanced Computing. 2016: 1-6.
[15] 刘林. 面向科技人才情报的多策略组合模型同名消歧方法[J]. 通信技术, 2018,51(8):1836-1843.
[15] ( Liu Lin. Multi-strategy Combination Model for Scientific and Technological Talent Disambiguation[J]. Communications Technology, 2018,51(8):1836-1843.)
[16] Zhang B C, Hasan M A. Name Disambiguation in Anonymized Graphs Using Network Embedding[OL]. arXiv Preprint, arXiv: 1702.02287.
[17] Zhang W, Yan Z, Zheng Y. Author Name Disambiguation Using Graph Node Embedding Method[C]// Proceedings of 2019 IEEE 23rd International Conference on Computer Supported Cooperative Work in Design (CSCWD). 2019: 410-415.
[18] 余传明, 钟韵辞, 林奥琛, 等. 基于网络表示学习的作者重名消歧研究[J]. 数据分析与知识发现, 2020,4(2/3):48-59.
[18] ( Yu Chuanming, Zhong Yunci, Lin Aochen, et al. Author Name Disambiguation with Network Embedding[J]. Data Analysis and Knowledge Discovery, 2020,4(2/3):48-59.)
[19] Yu Z Z, Yang B. Researcher Name Disambiguation: Feature Learning and Affinity Propagation Clustering[C]// Proceedings of the International Symposium on Methodologies for Intelligent Systems. 2018: 225-235.
[20] Zhu J, Wu X C, Lin X Q, et al. A Novel Multiple Layers Name Disambiguation Framework for Digital Libraries Using Dynamic Clustering[J]. Scientometrics, 2018,114(3):781-794.
doi: 10.1007/s11192-017-2611-8
[21] Shen Q M, Wu T S, Yang H Y, et al. NameClarifier: A Visual Analytics System for Author Name Disambiguation[J]. IEEE Transactions on Visualization and Computer Graphics, 2017,23(1):141-150.
doi: 10.1109/TVCG.2016.2598465 pmid: 27514051
[22] GB/T 6447-1986, 文摘编写规则[S]. 北京: 中国标准出版社, 1986.
[22] ( GB/T 6447-1986, Rules for Abstracts and Abstracting[S]. Beijing: Standards Press of China, 1986. )
[23] Han H Q, Yao C Q, Fu Y, et al. Semantic Fingerprints-based Author Name Disambiguation in Chinese Documents[J]. Scientometrics, 2017,111(3):1879-1896.
doi: 10.1007/s11192-017-2338-6
[24] Li N, Han J. The Application of Naive Bayes Classifier in Name Disambiguation[C]// Proceedings of the 3rd International Conference on Cloud Computing and Security. 2017: 611-618.
[25] Hussain I, Asghar S. Incremental Author Name Disambiguation Using Author Profile Models and Self-citations[J]. Turkish Journal of Electrical Engineering and Computer Sciences, 2019,27(5):3665-3681.
doi: 10.3906/elk-1806-132
[26] Abdulhayoglu M A, Thijs B. Use of ResearchGate and Google CSE for Author Name Disambiguation[J]. Scientometrics, 2017,111(3):1965-1985.
doi: 10.1007/s11192-017-2341-y
[27] Zhao Z Q, Rollins J, Bai L G, et al. Incremental Author Name Disambiguation for Scientific Citation Data[C]// Proceedings of 2017 IEEE International Conference on Data Science & Advanced Analytics. 2017: 175-183.
[28] Pooja K M, Mondal S, Chandra J. A Graph Combination with Edge Pruning-Based Approach for Author Name Disambiguation[J]. Journal of the Association for Information Science and Technology, 2020,71(1):69-83.
doi: 10.1002/asi.v71.1
[29] Backes T. Effective Unsupervised Author Disambiguation with Relative Frequencies[OL]. arXiv Preprint, arXiv: 1808.04216.
[30] Pooja K M, Mondal S, Chandra J. An Unsupervised Heuristic Based Approach for Author Name Disambiguation[C]// Proceedings of 2018 10th International Conference on Communication Systems & Networks (COMSNETS). 2018: 540-542.
[31] Peng L W, Shen S Q, Xu J, et al. Diting: An Author Disambiguation Method Based on Network Representation Learning[J]. IEEE Access, 2019,7:135539-135555.
doi: 10.1109/Access.6287639
[32] Huang H H, Kuo Y H. Cross-Lingual Document Representation and Semantic Similarity Measure: A Fuzzy Set and Rough Set Based Approach[J]. IEEE Transactions on Fuzzy Systems, 2010,18(6):1098-1111.
doi: 10.1109/TFUZZ.2010.2065811
[33] Hussain I, Asghar S. Author Name Disambiguation by Exploiting Graph Structural Clustering and Hybrid Similarity[J]. Arabian Journal for Science & Engineering, 2018,43(12):7421-7437.
[34] Muller M C. Semantic Author Name Disambiguation with Word Embeddings[C]// Proceedings of the International Conference on Theory and Practice of Digital Libraries. 2017: 300-311.
[35] Xu X L, Li Y P, Liptrott M, et al. NDFMF: An Author Name Disambiguation Algorithm Based on the Fusion of Multiple Features[C]// Proceedings of the 42nd Annual Computer Software and Applications Conference (COMPSAC). IEEE, 2018: 187-190.
[36] Zhang L Z, Ban Z J. Large Scale Name Disambiguation Using Rule-based Post Processing Combined with Aminer[C]// Proceedings of the International CCF Conference on Artificial Intelligence. 2019: 147-158.
[37] Zhang B C, Dundar M, Hasan M A. Bayesian Non-exhaustive Classification a Case Study: Online Name Disambiguation Using Temporal Record Streams[C]// Proceedings of the 25th ACM International Conference on Information and Knowledge Management. 2016: 1341-1350.
[38] Zhang B C, Dundar M, Dave V, et al. Dirichlet Process Gaussian Mixture for Active Online Name Disambiguation by Particle Filter[C]// Proceedings of 2019 ACM/IEEE Joint Conference on Digital Libraries (JCDL). 2019: 269-278.
[39] Lin X Q, Zhu J, Tang Y, et al. A Novel Approach for Author Name Disambiguation Using Ranking Confidence[C]// Proceeding of the International Conference on Database Systems for Advanced Applications. 2017: 169-182.
[40] Protasiewicz J, Dadas S. A Hybrid Knowledge-based Framework for Author Name Disambiguation[C]// Proceedings of 2016 IEEE International Conference on Systems, Man, and Cybernetics (SMC). 2016: 594-600.
[41] 翟晓瑞, 韩红旗, 张运良, 等. 基于稀疏分布式表征的英文著者姓名消歧研究[J]. 计算机应用研究, 2019,36(12):3534-3538.
[41] ( Zhai Xiaorui, Han Hongqi, Zhang Yunliang, et al. Research on English Author Name Disambiguation Based on Sparse Distributed Representation[J]. Application Research of Computers, 2019,36(12):3534-3538.)
[42] Zhang Y T, Zhang F J, Yao P, et al. Name Disambiguation in AMiner: Clustering, Maintenance, and Human in the Loop[C]// Proceedings of the 24th ACM SIGKDD International Conference on Knowledge Discovery & Data Mining. 2018: 1002-1011.
[43] Sun S M, Zhang H, Li N, et al. Name Disambiguation for Chinese Scientific Authors with Multi-Level Clustering[C]// Proceedings of IEEE International Conference on Computational Science & Engineering & IEEE International Conference on Embedded & Ubiquitous Computing. 2017: 176-182.
[44] Du H L, Jiang Z Y, Gao J L. Who is Who: Name Disambiguation in Large-Scale Scientific Literature[C]// Proceedings of the International Conference on Data Mining Workshops (ICDMW). 2019: 1037-1044.
[45] Chen B, Zhang J, Tang J, et al. CONNA: Addressing Name Disambiguation on the Fly[OL]. arXiv Preprint,arXiv: 1910. 12202.
[46] Wang H W, Wang R J, Wen C, et al. Author Name Disambiguation on Heterogeneous Information Network with Adversarial Representation Learning[OL]. arXiv Preprint,arXiv: 2002. 09803.
[47] Ma X, Wang R R, Zhang Y. Author Name Disambiguation in Heterogeneous Academic Networks[C]// Proceedings of International Conference on Web Information Systems and Applications. 2019: 126-137.
[48] Qiao Z Y, Du Y, Fu Y J, et al. Unsupervised Author Disambiguation Using Heterogeneous Graph Convolutional Network Embedding[C]// Proceedings of 2019 IEEE International Conference on Big Data. 2019: 910-919.
[49] Silva J M B, Silva F. Feature Extraction for the Author Name Disambiguation Problem in a Bibliographic Database[C]// Proceedings of the Symposium on Applied Computing. 2017: 783-789.
[50] Santana A F, Goncalves M A, Laender A H F, Incremental Author Name Disambiguation by Exploiting Domain-Specific Heuristics[J]. Journal of the American Society for Information Science and Technology, 2017,68(4):931-945.
[51] Katsurai M, Ohmukai I, Takeda H, Topic Representation of Researchers' Interests in a Large-scale Academic Database and Its Application to Author Disambiguation[J]. IEICE Transactions on Information & Systems, 2016,E99,D(4):1010-1018.
[52] Amplayo R K, Hwang S-W, Song M. AutoSense Model for Word Sense Induction[J]. arXiv Preprint, arXiv: 1811.09242.
[53] Kim K, Rohatgi S, Giles C L. Hybrid Deep Pairwise Classification for Author Name Disambiguation[C]// Proceedings of the 28th ACM International Conference on Information and Knowledge Management. 2019: 2369-2372.
[54] Xu J, Shen S Q, Li D S, et al. A Network-embedding Based Method for Author Disambiguation[C]// Proceedings of the 27th ACM International Conference on Information and Knowledge Management. 2018: 1735-1738.
[55] Deng C H, Deng H F, Li C R. A Scholar Disambiguation Method Based on Heterogeneous Relation-Fusion and Attribute Enhancement[J]. IEEE Access, 2020,8:28375-28384.
doi: 10.1109/Access.6287639
[56] Yan H, Peng H, Li C, et al. Bibliographic Name Disambiguation with Graph Convolutional Network[C]// Proceedings of the 20th International Conference on Web Information Systems Engineering. 2019: 538-551.
[57] 范午攸. 一种针对已知作者的姓名消歧方法[J]. 图书馆杂志, 2018,37(12):56-63.
[57] ( Fan Wuyou. Method to Remove Ambiguity of Names of Known Authors[J]. Library Journal, 2018,37(12):56-63.)
[58] Kim J, Kim J. The Impact of Imbalanced Training Data on Machine Learning for Author Name Disambiguation[J]. Scientometrics, 2018,117(1):511-526.
doi: 10.1007/s11192-018-2865-9
[59] Halkidi M, Vazirgiannis M, Batistakis Y. Quality Scheme Assessment in the Clustering Process[C]// Proceedings of the 4th European Conference on Principles of Data Mining and Knowledge Discovery. 2000: 265-276.
[60] Momeni F, Mayr P. Using Co-authorship Networks for Author Name Disambiguation[C]// Proceedings of the 16th ACM/IEEE-CS Joint Conference on Digital Libraries. 2016: 261-262.
[61] Fan X M, Wang J Y, Pu X, et al. On Graph-based Name Disambiguation[J]. ournal of Data and Information Quality, 2011, 10.
[62] Franzoni V, Lepri M, Milani A. Topological and Semantic Graph-based Author Disambiguation on DBLP Data in Neo4j[OL]. arXiv Preprint,arXiv: 1901. 08977.
[63] 于夏薇, 袁军鹏. 融合语料库的论文作者姓名中英自动翻译研究[J]. 情报工程, 2018,4(1):42-51.
[63] ( Yu Xiawei, Yuan Junpeng. Research on Chinese and English Automatic Translation Combined Authorship Corpus[J]. Technology Intelligence Engineering, 2018,4(1):42-51.)
[64] 张新征, 雷鹏飞, 李玉坤, 等. 面向论文检索的同名作者区分方法[J]. 计算机与数字工程, 2017,45(2):216-220, 372.
[64] ( Zhang Xinzheng, Lei Pengfei, Li Yukun, et al. A Method of Same Name Author Distinguishment Towards Paper Retrieval[J]. Computer and Digital Engineering, 2017,45(2):216-220, 372.)
[65] 邓可君, 华凯, 邓昌明, 等. 基于机器学习的论文作者名消歧方法研究[J]. 四川大学学报(自然科学版), 2019,56(2):241-245.
[65] ( Deng Kejun, Hua Kai, Deng Changming, et al. Research on Author Name Disambiguation Method Based on Machine Learning[J]. Journal of Sichuan University (Natural Science Edition), 2019,56(2):241-245.)
[66] Kim K, Sefid A, Giles C L. Scaling Author Name Disambiguation with CNF Blocking[OL]. arXiv Preprint,arXiv: 1709.09657.
[67] 高悦, 王文贤, 杨淑贤. 一种基于狄利克雷过程混合模型的文本聚类算法[J]. 信息网络安全, 2015(11):60-65.
[67] ( Gao Yue, Wang Wenxian, Yang Shuxian. A Document Clustering Algorithm Based on Dirichlet Process Mixture Model[J]. Netinfo Security, 2015(11):60-65.)
[68] 张旺强, 祝忠明, 李雅梅, 等. 机构知识库作者名自动消歧框架设计与实践[J]. 数据分析与知识发现, 2019,3(6):92-98.
[68] ( Zhang Wangqiang, Zhu Zhongming, Li Yamei, et al. Disambiguating Author Names Automatically for Institutional Repository[J]. Data Analysis and Knowledge Discovery, 2019,3(6):92-98.)
[69] Muller M C, Reitz F, Roy N. Data Sets for Author Name Disambiguation: An Empirical Analysis and a New Resource[J]. Scientometrics, 2017,111(3):1467-1500.
doi: 10.1007/s11192-017-2363-5 pmid: 28596627
[70] Tang A Y, Wu C K, Liu J, et al. Parallel Computing for Large-scale Author Name Disambiguation in MEDLINE[C]// Proceedings of 2019 IEEE 21st International Conference on High Performance Computing and Communications; IEEE 17th International Conference on Smart City; IEEE 5th International Conference on Data Science and Systems (HPCC/SmartCity/DSS). 2019: 1580-1586.
[1] 余传明,钟韵辞,林奥琛,安璐. 基于网络表示学习的作者重名消歧研究*[J]. 数据分析与知识发现, 2020, 4(2/3): 48-59.
[2] 张旺强,祝忠明,李雅梅,卢利农,刘巍. 机构知识库作者名自动消歧框架设计与实践*[J]. 数据分析与知识发现, 2019, 3(6): 92-98.
[3] 孙海霞, 王蕾, 吴英杰, 华薇娜, 李军莲. 科技文献数据库中机构名称匹配策略研究*[J]. 数据分析与知识发现, 2018, 2(8): 88-97.
[4] 杨波, 杨军威, 阎素兰. 基于规则的机构名规范化研究[J]. 现代图书情报技术, 2015, 31(6): 57-63.
[5] 张建勇, 黄永文, 于倩倩, 董智鹏, 郭舒. 中国ORCID注册平台iAuthor的设计与实现[J]. 现代图书情报技术, 2015, 31(3): 84-91.
[6] 郭舒. 文献数据库中作者名消歧算法研究[J]. 现代图书情报技术, 2013, 29(7/8): 69-74.
[7] 肖晶, 梁冰, 张晓丹, 吕世炅. 一种面向篇级数据的作者名消歧规则和算法[J]. 现代图书情报技术, 2012, 28(5): 55-59.
[8] 雷春炳,张晓梅,颜世刚,王国庆,陈建青,刘金玉,杜云祥. 西文生物医学期刊文献数据库(EMCC)建设[J]. 现代图书情报技术, 2005, 21(8): 54-57.
[9] 董斌,阮立. CERNET用户接入国外数据库的问题及对策[J]. 现代图书情报技术, 2004, 20(4): 93-96.
[10] 谈春梅. 会议文献数据库系统的开发与设计[J]. 现代图书情报技术, 2004, 20(12): 51-54.
[11] 谈春梅,段卫华. 特种文献数据库系统关键技术的研究与实现[J]. 现代图书情报技术, 2002, 18(6): 52-54.
[12] 柳丹枫. 中共福建省委党校省情资料全文数据库项目建设初探[J]. 现代图书情报技术, 2002, 18(6): 55-58.
[13] 谈春梅,段卫华,田质斌. 标准文献数据库系统的设计与实现[J]. 现代图书情报技术, 2001, 17(6): 21-23.
[14] 陈建青,颜世刚,雷春炳,王桂枝,刘春延. CMCC数据库的研制及产业化——回顾与展望[J]. 现代图书情报技术, 2001, 17(4): 54-56.
[15] 曹志梅,渠芳. 地方文献数据库检索系统建立之设想[J]. 现代图书情报技术, 2000, 16(6): 83-84.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
版权所有 © 2015 《数据分析与知识发现》编辑部
地址:北京市海淀区中关村北四环西路33号 邮编:100190
电话/传真:(010)82626611-6626,82624938
E-mail:jishu@mail.las.ac.cn