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Exploit latent Dirichlet allocation for collaborative filtering

Frontiers of Computer Science 2018年第3期12卷 571-581页

作者： zhoujun LI Haijun ZHANG Senzhang WANG Feiran HUANG Zhenping LI jianshe zhou State Key Laboratory of Software Development Environment Beihang University Beijing 100191 China School of Information Beijing Wuzi University Beijing 101149 China College of Computer Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211106 China Collaborative Innovation Center of Novel Software Technology and Industrialization Nanjing 211106 China Beijing Advanced Innovation Center for Imaging Technology Capital Normal University Beijing 100048 China

Previous work on the one-class collaborative filtering （OCCF） problem can be roughly categorized into pointwise methods, pairwise methods, and content-based methods. A fundamental assumption of these approaches is that all missing values in the user-item rating matrix are considered negative. However, this assumption may not hold because the missing values may contain negative and positive examples. For example, a user who fails to give positive feedback about an item may not necessarily dislike it; he may simply be unfamiliar with it. Meanwhile, content-based methods, e.g. collaborative topic regression （CTR）, usually require textual content information of the items, and thus their applicability is largely limited when the text information is not available. In this paper, we propose to apply the latent Dirichlet allocation （LDA） model on OCCF to address the above-mentioned problems. The basic idea of this approach is that items are regarded as words, users are considered as documents, and the user-item feedback matrix constitutes the corpus. Our model drops the strong assumption that missing values are all negative and only utilizes the observed data to predict a user＇s interest. Additionally, the proposed model does not need content information of the items. Experimental results indicate that the proposed method outperforms previous methods on various ranking-oriented evaluation *** further combine this method with a matrix factorizationbased method to tackle the multi-class collaborative filtering （MCCF） problem, which also achieves better performance on predicting user ratings.

关键词： latent Dirichlet allocation one-class collaborative filtering multi-class collaborative filtering

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Linked Open Data Query Based on Natural Language

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Chinese Journal of Electronics 2017年第2期26卷 230-235页

作者： LIU Jie LI Wei LUO Liming zhou jianshe HAN Xu SHI Jinsheng College of Information Engineering Capital Normal University Beijing Advanced Innovation Center for Imaging Technology Capital Normal University

Linked open data(LOD) supports the SPARQL query strongly.A translation system from the natural language query to the SPARQL query based on the syntax rules is *** a natural language query,a parsing method is proposed to represent the query intention and construct the corresponding query *** algorithms for obtaining and instantiating triple patterns are designed based on the rules.A mapping method for different types of graph nodes is lastly proposed to improve the *** experiments based on test data from QALD-4 are *** with the other systems,our system is more easy and effective,and evaluation results are outstanding in the field of unsupervised learning.

关键词： SPARQL conversion SPARQL query Query parsing Dependency parsing Linked open data(LOD)

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Brief Overview of Intelligent Education

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Journal of Contemporary Educational Research 2021年第8期5卷 187-192页

作者： Tiejun Shao jianshe zhou Capital Normal University Beijing 100048 China North China Institute of Science and Technology Langfang 065201China Research Center For Language Intelligence of China Beijing 100048China

Intelligent Education uses Al technology as a means in the education ecology to promote the automation and intelligence of education and *** reshapes the education ecology,adding Al things to the traditional education ecology that dominated by teachers and *** IE technology is widely used,there is little discussion about a comprehensive overview of *** goal and connotation of IE is ***,the emotional,ethical,Al technology as well as supervision and management perspectives in IE are discussed *** core goal of IE is putted forward that is human-oriented and individualized development of students ***,the education ecology with dual-teacher collaborative in intelligence education was proposed.

关键词： Artificial intelligence Intelligent education Emotion analysis

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语言智能场景下的学习行为多模态情感语义库建设

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语言文字应用 2023年第3期 121-131页

作者：周楠周建设首都师范大学文学院/中国语言智能研究中心北京100048 北京开放大学首都终身教育研究基地北京100081

学生学习行为多模态情感语义库建设对学生学习情感分析与教学评价具有重要意义,它可以通过文本、语音和视频等多模态信息分析和识别学生情感,有助于掌握学生的学习状态。目前,学习行为情感语义库较少且形态单一,制约了学习行为情感分析... 详细信息

学生学习行为多模态情感语义库建设对学生学习情感分析与教学评价具有重要意义,它可以通过文本、语音和视频等多模态信息分析和识别学生情感,有助于掌握学生的学习状态。目前,学习行为情感语义库较少且形态单一,制约了学习行为情感分析技术的进一步发展。本研究基于语言智能场景制定了一套科学完整的标注体系,构建了学习行为多模态情感语义库智能建设流程,并探讨了语义库在解析情感表达和构造情感智能识别模型、开展教学评价等多个方面的应用,为提高语义库的构建效率、掌握学生学习状态、优化教学策略提供了支持。

关键词：语言智能学生学习行为情感语义库

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An Improved K-Means Algorithm Based on Initial Clustering Center Optimization

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ZTE Communications 2017年第B12期15卷 43-46页

作者： LI Taihao NAREN Tuya zhou jianshe REN Fuji LIU Shupeng Beijing Advanced Innovation Center for Imaging Technology Capital Normal UniversityBeijing 100048China Flatley Discovery Lab Boston 02129USA Department of Information Science&Intelligent Systems University of TokushimaTokushima 7708506Japan School of Communication and Information Engineering Shanghai UniversityShanghai 200072China

The K-means algorithm is widely known for its simplicity and fastness in text ***,the selection of the initial clus?tering center with the traditional K-means algorithm is some random,and therefore,the fluctuations and instability of the clustering results are strongly affected by the initial clustering *** paper proposed an algorithm to select the initial clustering center to eliminate the uncertainty of central point *** experiment results show that the improved K-means clustering algorithm is superior to the traditional algorithm.

关键词： clustering K-means algorithm initial clustering center

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Phase-Locked Loop Based Cancellation of ECG Power Line Interference

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ZTE Communications 2018年第1期16卷 47-51页

作者： LI Taihao zhou jianshe LIU Shupeng SHI Jinsheng REN Fuji Beijing Advanced Innovation Center for Imaging Technology Capital Normal UniversityBeijing 100048China Flatley Discovery Lab Boston 02129USA School of Communication and Information Engineering Shanghai UniversityShanghai 200072China Department of Information Science and Intelligent Systems University of TokushimaTokushima 7708506Japan

Power line(PL)interference is one significant artifact in electrocardiography(ECG)that needs to be reduced to ensure accurate recording of cardiac *** PL interference is non-stationary and has varying frequency,phase,and amplitude in ECG measurement,adaptive techniques are often necessary to track and cancel the *** this paper we present a phase-locked loop(PLL)-based adaptive filter to cancel PL *** PLL obtains the reference signal that is fed into the adaptive filter to remove the PL interference at the central frequency of 50 *** is found that the technique can effectively cancel PL interference in real ECG signals and,when compared with some existing techniques such as least mean squares(LMS)adaptive filter,the new technique produces better results in terms of signal-to-interference ratio(SIR).

关键词： phase-locked loop ECG adaptive filter power line cancella-tion

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先秦语义来源理论

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首都师范大学学报（社会科学版） 2008年第2期 107-111页

作者：周建设首都师范大学文学院教授北京100089

语义来源问题是语言哲学研究的基本问题。本文考察先秦时代关于语义来源的理论,发现先秦关于语义来源的理论主要有两种:一是"象""意"摹写论,二是感官认知论。承载语义的符号是社会约定的。该项研究旨在对当代学者探索语义认知规律提供... 详细信息

语义来源问题是语言哲学研究的基本问题。本文考察先秦时代关于语义来源的理论,发现先秦关于语义来源的理论主要有两种:一是"象""意"摹写论,二是感官认知论。承载语义的符号是社会约定的。该项研究旨在对当代学者探索语义认知规律提供借鉴。

关键词：语义符号认知语言哲学

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Present Situation, Problems and Countermeasures of Fishery Resources Protection in Tibet

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Animal Husbandry and Feed Science 2016年第2期8卷 119-122页

作者： Zhang Chi Li Baohai Gong Junhua zhou jianshe Pan Yingzi Wang Wanliang Fisheries Research Institute Tibet Academy of Agricultural and Animal Husbandry Sciences

The present situation of fishery resources in Tibet was analyzed in the paper. The correspending conservation countermeasures aiming at various ecologi- cal and social problems of fishery resources in Tibet were put forward, including ex-situ conservation of some rare and endangered fishes, strengthening protection of gennplasm resources, establishing special and integrated nature reserves, and constituting environmental monitoring system for rare and special fish resources. Moreover, we should pay equal attention to economic development and environmental protection, strengthen propaganda and research, protect the existing habitat of rare and endangered species, and prevent invasion of Mien species, thereby ensuring sustainable development of fishery production.

关键词： Fishery resources Germplasm Biodiversity

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Research Progress of Fishery Resources in Tibet

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Animal Husbandry and Feed Science 2016年第4期8卷 246-250页

作者： zhou jianshe min zhiping zhang chi li baohai wang wanliang pan yingzi institute of fishery sciences tibet academy of agricultural and animal husbandry sciences，Lasa 850032，China tibet academy of agricultural and animal husbandry sciences，Lhasa 850032，China

The paper was to better understand fishery resources status in Tibet, to effectively protect rare and endangered cold-water fish resources, and to further understand the difficulties in rational exploitation and protection and utilization of fisheries resources. This study made a systematic analysis of research progress of fishery resources in Tibet and pointed out that Tibet had abundant water resources, but the aquatic industry lagged behind; resource utilization was extremely limit- ed; and endangered species had not been timely protected. It was very difficult to promote popularity of aquatic industry in Tibet because of weak infrastructure con- struetion and a serious lack of relevant technicians. Actually, the aquatic industry in Tibet remained basically a blank. Therefore, it was both important and neces- sary to establish fishery resources monitoring network based on platean water resource system. Furthermore, initial ideas for further investigation of water resources were put forward.

关键词： Tibet Fishery industry Resource

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残疾人竞技体育运动审美初探

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湖南师范大学社会科学学报 2016年第3期45卷 27-32页

作者：李萍周建社湖南师范大学体育学院湖南长沙410081 湖南大众传媒职业技术学院湖南长沙410081

无论是为了推动我国体育事业的发展,还是为了加强我国体育运动美学学科的建设,都离不开对残疾人竞技体育运动审美研究。这一研究应从厘清残疾人、竞技体育运动、残疾人竞技体育运动等相关概念入手,进而不仅揭示出残疾人在竞技运动中通... 详细信息

无论是为了推动我国体育事业的发展,还是为了加强我国体育运动美学学科的建设,都离不开对残疾人竞技体育运动审美研究。这一研究应从厘清残疾人、竞技体育运动、残疾人竞技体育运动等相关概念入手,进而不仅揭示出残疾人在竞技运动中通过运动力度、速度、节奏感和协调性等体现出技战术上的优雅美等一般之美,更要揭示出残疾人在竞技体育运动中体现出的人体上的残缺美和人格上的悲壮美、崇高美等独特之美。

关键词：残疾人竞技体育审美

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