检索结果-南通市图书馆

Journal of Social Computing 2023年第1期4卷 12-29页

作者： Yuanyi Zhen jar-der luo Hui Chen 不详 School of Chinese Language and Literature Beijing Foreign Studies UniversityBeijing 100089China

Prior studies have shown the importance of classroom dialogue in academic performance,through which knowledge construction and social interaction among students take ***,most of them were based on small scale or qualitative data,and few has explored the availability and potential of big data collected from online *** address this issue,this paper analyzes dialogues in live classrooms of a large online learning platform in China based on natural language processing *** features of interactive types and emotional expression are extracted from classroom *** then develop neural network models based on these features to predict high-and low-academic performing students,and employ interpretable AI(artificial intelligence)techniques to determine the most important predictors in the prediction *** both STEM(science,technology,engineering,mathematics)and non-STEM courses,it is found that high-performing students consistently exhibit more positive emotion,cognition and off-topic dialogues in all stages of the lesson than low-performing ***,while the metacognitive dialogue illustrates its importance in non-STEM courses,this effect cannot be found in STEM *** high-performing students in non-STEM courses show negative emotion in the last stage of lessons,STEM students show positive emotion.

关键词： academic performance prediction live classroom dialogue emotional expression interactive type natural language processing deep learning

Message from Editors-in-Chief

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Social Computing 2022年第4期3卷 I0001-I0002页

作者： James Evans Xiaoming Fu jar-der luo 不详

Dear readers,It is our pleasure to introduce the second issue of the third volume of the Journal of Social *** two special issues in the second half of 2021 and one special issue in March 2022,the present issue is bac... 详细信息

关键词： pleasure second comprise

Message from Editors-in-Chief

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Social Computing 2021年第2期2卷 I0001-I0002页

作者： James Evans Xiaoming Fu jar-der luo 不详

Dear readers It’s our pleasure to welcome you to the first issue of the second volume of the Journal of Social *** issue comprises the following six interesting *** the first article,“Using Twitter Bios to Measure Changes in Self-Identity:Are Americans Defining Themselves More Politically Over Time?”,Nick Rogers and Jason *** study whether Americans’political views will converge to their self-identify over *** authors introduce a methodology called“Longitudinal Online Profile Sampling(LOPS)”,which suggests a positive answer based on their analysis of millions of Twitter user bios over four years,where Twitter users tend to add political words more frequently to their bios than any other category.

关键词： Twitter Message Online

Inaugural Message from Editors-in-Chief

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Social Computing 2020年第1期1卷 I0001-I0004页

作者： James Evans Xiaoming Fu jar-der luo Faculty Director of Computational Social Science Knowledge Lab at the University of Chicago and the Santa Fe Institute the University of Gottingen Germany Department of Sociology Tsinghua University Tsinghua Social Network Research Center

On behalf of the Editorial Board,it is our privilege to present the first issue of the Journal of Social Computing,affectionately shortened *** computing concerns the intersection of social behavior and computational *** focused on recreating human social conventions and contexts through software and technology,we propose its expansion to the full interface between social interaction and computation.

关键词： Message computing behalf

Predicting Tie Strength of Chinese Guanxi by Using Big Data of Social Networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Social Computing 2020年第1期1卷 40-52页

作者： Xin Gao jar-der luo Kunhao Yang Xiaoming Fu Loring Liu Weiwei Gu Department of Sociology Tsinghua UniversityBeijing 100084China School of Arts and Sciences University of TokyoTokyo 153-8902Japan Institute of Computer Science University of G¨ottingenG¨ottingen 37077Germany Tencent Computer System Co.Ltd Shenzhen 518000China Information Science and Technology Beijing University of Chemical TechnologyBeijing 100029China

This paper poses a question:How many types of social relations can be categorized in the Chinese context?In social networks,the calculation of tie strength can better represent the degree of intimacy of the relationship between nodes,rather than just indicating whether the link exists or *** research suggests that Granovetter measures tie strength so as to distinguish strong ties from weak ties,and the Dunbar circle theory may offer a plausible approach to calculating 5 types of relations according to interaction frequency via unsupervised learning(e.g.,clustering interactive data between users in Facebook and Twitter).In this paper,we differentiate the layers of an ego-centered network by measuring the different dimensions of user's online interaction data based on the Dunbar circle *** label the types of Chinese guanxi,we conduct a survey to collect the ground truth from the real world and link this survey data to big data collected from a widely used social network platform in *** repeating the Dunbar experiments,we modify our computing methods and indicators computed from big data in order to have a model best fit for the ground *** the same time,a comprehensive set of effective predictors are selected to have a dialogue with existing theories of tie ***,by combining Guanxi theory with Dunbar circle studies,four types of guanxi are found to represent a four-layer model of a Chinese ego-centered network.

关键词： tie strength Dunbar circle theory Chinese Guanxi theory supervised classification model social network

Message from Editors-in-Chief

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Social Computing 2024年第1期5卷 I0001-I0001页

作者： Evans, James Fu, Xiaoming luo, jar-der

Dear Readers,We are thrilled to present the 1st issue of the 5th volume of the Journal of Social Computing,featuring a diverse array of research papers that delve into pivotal issues at the intersection of technology,society,and economics in the context of social *** paper offers solutions and insights into critical societal challenges,contributing to our understanding of complex socio-technical phenomena and paving the way for change.

关键词： insight change. intersection

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

以复杂思维考察制度涌现

外国经济与管理 2023年第1期45卷 23-37页

作者：罗家德万怡张江清华大学社会科学学院北京100084 清华大学公共管理学院北京100084 清华大学社会学系北京100084 北京师范大学系统科学学院北京100091

复杂思维反对还原论,从思考开放系统的本质出发,将主体的能动性、主体间的网络结构以及自组织纳入思维架构,考察系统涌现出的新特质及非线性的演化过程。本文通过对埃德加·莫兰的复杂思维的介绍,结合莫兰由复杂系统研究中被多学科共用... 详细信息

复杂思维反对还原论,从思考开放系统的本质出发,将主体的能动性、主体间的网络结构以及自组织纳入思维架构,考察系统涌现出的新特质及非线性的演化过程。本文通过对埃德加·莫兰的复杂思维的介绍,结合莫兰由复杂系统研究中被多学科共用的几个主要概念——有序、无序、组织、相互作用——共同形成的二重逻辑下的基础概念架构,引入格兰诺维特的“行动与网络共同演化”视角以及卢曼从“自创生”概念发展出的“社会自创生”理论,以补充基础架构中相互作用与组织的含义。同时,以这一扩充的概念架构具体分析两个复杂社会系统研究的理论范例,重新诠释集中式发电产业体制的建构过程与越南农业制度演进中的农民运动,得到不同于还原论范式的理论解释。本文还提出将中庸之道的动态平衡的概念纳入扩充架构,并尝试将之与格兰诺维特的理论结合,对两个理论研究范例继续做出解释,展示出概念架构进一步拓展的可能性。本文提出的概念架构使作为一种分析视角的复杂思维有所发展,并能补充既往还原论范式下社会科学研究中的简化解释,得到新的发现,拓展社会科学、管理学研究的理论视角。

关键词：复杂系统研究复杂社会系统复杂思维自组织涌现

复杂社会系统的涌现现象——以大数据分析结构与行动共同演化

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

社会学研究 2024年第2期39卷 134-155,M0006页

作者：罗家德万怡高馨清华大学社会科学学院清华大学公共管理学院哥本哈根大学传播学院

本文结合实证案例探讨如何以社会计算研究社会系统中的涌现现象。中国风险投资产业的案例说明VC投资行为与产业网络结构共演过程中的正反馈导致了“精英俱乐部型小世界网络”的结构涌现,解释了个体行为如何促成集体涌现;某大型科技公司... 详细信息

本文结合实证案例探讨如何以社会计算研究社会系统中的涌现现象。中国风险投资产业的案例说明VC投资行为与产业网络结构共演过程中的正反馈导致了“精英俱乐部型小世界网络”的结构涌现,解释了个体行为如何促成集体涌现;某大型科技公司的案例展现了集体智能涌现的过程及因素,并说明了系统转型前后团队创新能力的影响因素存在差异,解释了非线性发展对员工行为的影响。案例体现了调查数据与大数据结合、多种社会计算方法综合运用的方法取向及其在复杂系统研究中应用的可行性。

关键词：复杂社会系统大数据非线性演化涌现

Large language model and domain-specific model collaboration for smart education

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Frontiers of Information Technology & Electronic Engineering 2024年第3期25卷 333-341页

作者： Yawei luo Yi YANG School of Software Technology Zhejiang UniversityNingbo 315048China College of Computer Science and Technology Zhejiang UniversityHangzhou 310027China

In this paper,we introduce the large language model and domain-specific model collaboration(LDMC)framework designed to enhance smart *** LDMC framework leverages the comprehensive and versatile knowledge of large domain-general models,combines it with the specialized and disciplinary knowledge from small domainspecific models(DSMs),and incorporates pedagogy knowledge from learning theory *** integration yields multiple knowledge representations,fostering personalized and adaptive educational *** explore various applications of the LDMC framework in the context of smart education.

关键词： smart language knowledge

Switching Behavior of Cascode GaN Under Influence of Gate Driver

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2024年第4期10卷 1816-1833页

作者： Bin luo Guangzhao luo Sihai Li School of Automation Northwestern Polytechnical UniversityXi’an 710072China

With high-frequency,low power dissipation and high-efficiency characteristics,Gallium nitride(GaN)power devices are of significant benefit in designing high-speed motor drives,as they improve performance and reduce ***,due to the cascode structure,coupling with the parasitics in gate driver and power circuits,power converters based on cascode GaN are prone to overshoot and oscillate on switching waveforms,which may lead to serious EMC problems,or even device *** complicated structure of cascode GaN device makes the gate driver design comparatively *** analytical model of the switching process considering gate driver parameters is proposed in this *** influence of gate driver parameters on switching behavior is investigated from the perspective of switching speed,waveform overshoot,and power ***-offs among overshoot,switching speed,and power loss are discussed;guidelines to design gate driver parameters are given.

关键词： Gallium nitride(GaN) gate driver oscillation and overshoot switching characteristics