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Uni-LSDPM:基于预训练的统一在线学习会话退出预测模型 被引量:1
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作者 陈芮 王占全 《计算机研究与发展》 EI CSCD 北大核心 2024年第2期441-459,共19页
为了辅助学习者维持在线学习的连贯性以引导最优学习路径的执行,智能辅导系统(intelligent tutoring system,ITS)需要及时发现学习者退出学习的倾向,在合适的时间采取相应的干预措施,因此,在线学习会话退出预测研究十分必要.然而,与传... 为了辅助学习者维持在线学习的连贯性以引导最优学习路径的执行,智能辅导系统(intelligent tutoring system,ITS)需要及时发现学习者退出学习的倾向,在合适的时间采取相应的干预措施,因此,在线学习会话退出预测研究十分必要.然而,与传统的课程辍学相比,会话退出发生的频率更高,单次学习时长更短,故需要在有限的行为数据中对学习会话退出状态进行准确预测.因此,学习行为的碎片性和预测结果的即时性、准确性是学习会话退出预测任务的挑战和难点.针对会话退出预测任务,提出了一种基于预训练-微调的统一在线学习会话退出预测模型(unified online learning session dropout prediction model,Uni-LSDPM).该模型采用多层Transformer结构,分为预训练阶段和微调阶段.在预训练阶段,使用双向注意机制对学习者连续行为交互特征序列的特征表示进行学习.在微调阶段,应用序列到序列(sequenceto-sequence,Seq2Seq)的注意力机制对学习者连续行为交互特征序列与退出状态联合序列进行学习.基于EdNet公共数据集对模型进行预训练和微调,通过消融实验以获得最佳预测效果,并基于多个数据集进行了对比测试实验.实验结果表明,Uni-LSDPM在AUC和ACC方面优于现有的模型,并证明该模型具有一定的鲁棒性和扩展性. 展开更多
关键词 注意力机制 学习会话 退出预测 智能辅导系统 预训练
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Prefix-LSDPM:面向小样本的在线学习会话退出预测模型
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作者 陈芮 李飞 王占全 《华东理工大学学报(自然科学版)》 CAS CSCD 北大核心 2023年第5期754-763,共10页
在线学习会话退出预测旨在准确预测在线学习过程中的学习会话退出,是智慧教育领域中十分重要的一项研究任务。针对现有模型在小样本场景下预测准确率较低的问题,提出了基于前缀提示的在线学习会话退出预测模型Prefix-LSDPM。该模型为获... 在线学习会话退出预测旨在准确预测在线学习过程中的学习会话退出,是智慧教育领域中十分重要的一项研究任务。针对现有模型在小样本场景下预测准确率较低的问题,提出了基于前缀提示的在线学习会话退出预测模型Prefix-LSDPM。该模型为获取单个学习行为内部特征及连续学习行为之间的隐含关联信息,在改进了键值向量的Transformer网络中对提示形式的合成序列进行掩码学习;为降低模型训练涉及的参数量以适应小样本学习,将学习会话退出预测任务建模形式靠近预训练任务,并在冻结的预训练参数基础上对提示参数进行调优。基于多个数据集的实验结果表明,Prefix-LSDPM的预测准确率优于现有模型,且在小样本学习中仍能达到较好的预测效果。 展开更多
关键词 提示学习 预训练 学习会话 退出预测 小样本学习
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有利于学习者会话的因素分析 被引量:31
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作者 张雪梅 《解放军外国语学院学报》 北大核心 2002年第4期68-72,共5页
文章从L·S·韦格斯基的“最近发展区域”理论和“支架”理论出发 ,首先论述课堂会话作为知识共享和理解转化的有效中介。通过对学习者会话与教师—学习者会话的对比 ,探讨学习者会话的特征 ,并对三种不同的学习者—学习者会话... 文章从L·S·韦格斯基的“最近发展区域”理论和“支架”理论出发 ,首先论述课堂会话作为知识共享和理解转化的有效中介。通过对学习者会话与教师—学习者会话的对比 ,探讨学习者会话的特征 ,并对三种不同的学习者—学习者会话进行透析。依据上述发现 ,文章最后提出几个有利于学习者会话的因素 ,供教师在设计课堂教学任务时参考。 展开更多
关键词 L·S·韦格斯基 最近发展区域 支架 学习会话
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《WTO实用英语会话学习丛书》评介
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作者 王扬 余建琼 方灿 《渝西学院学报(社会科学版)》 2005年第1期110-112,共3页
对《WTO实用英语会话学习丛书》主要内容进行了初步的概述,并对丛书的编写特点进行了简要的评介,指出丛书是培养大学生专业英语(ESP)实用口语交际能力和应用能力的一套比较好的教材。
关键词 《WTO实用英语会话学习丛书》 特点 评介
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试论中小学生英语会话学习指导策略
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作者 金正丽 《儿童大世界(教学研究)》 2018年第8期205-206,共2页
现如今,英语作为一种语言,小学生英语会话学习对学生英语水平的提升有很大的帮助.所以本文从这个角度出发,提出了小学生英语会话学习指导的改进建议.
关键词 小学生 英语会话学习 指导策略
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基于整体序列建模的会话推荐模型 被引量:2
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作者 闫昭 项欣光 《南京理工大学学报》 EI CAS CSCD 北大核心 2021年第1期27-36,共10页
会话推荐常用的循环神经网络根据会话的短期交互生成相关表示。循环神经网络采用多次迭代的方式逐步生成表示,在每次迭代中选取局部最优解,无法从全局角度考虑会话记录中各项目的重要性,使会话表示的性能受限。针对该问题,该文提出一种... 会话推荐常用的循环神经网络根据会话的短期交互生成相关表示。循环神经网络采用多次迭代的方式逐步生成表示,在每次迭代中选取局部最优解,无法从全局角度考虑会话记录中各项目的重要性,使会话表示的性能受限。针对该问题,该文提出一种基于整体序列建模的会话推荐模型,通过综合考虑各项目内容对会话表示的重要性,生成更为有效的会话表示。为了更好地挖掘项目内容在会话推荐中的重要性,该文联合分析了该项目在会话历史中所处的位置和该项目与会话最新交互项目的关系等信息,衡量该项目在会话中的权重,最后融合会话历史中的各项目信息生成整体的会话表示。在3个公开数据集上进行的大量实验表明,该文方法明显优于现有方法,证明了其有效性。 展开更多
关键词 会话推荐 会话表示学习 神经网络 嵌入层 序列时序相关性
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机器学习在青少年性教育中的应用研究
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作者 陈龙 于一豪 +3 位作者 薛皓天 宋博凡 梁彦泽 许兵兵 《福建电脑》 2020年第8期129-130,共2页
为了让学生们能够在线上轻松地学习到科学全面系统的性知识,受线上“会话式学习”的新模式启发,本文整合有关性教育的教案资源、整理知识数据库,设计会话式的趣味学习模块,基于微信小程序,让用户在线上轻松获取全面系统的知识,从而全面... 为了让学生们能够在线上轻松地学习到科学全面系统的性知识,受线上“会话式学习”的新模式启发,本文整合有关性教育的教案资源、整理知识数据库,设计会话式的趣味学习模块,基于微信小程序,让用户在线上轻松获取全面系统的知识,从而全面高效地传播正确的性知识与性观念。为了给学生们提供一些相对专业的心理疏导,结合人工智能,给青少年一个倾诉和寻求帮助的对象,并为知识的授予方设计了一个“小莓人”的AI tutor形象。 展开更多
关键词 性教育 会话学习 人工智能 小莓人 微信小程序
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A Survey on Students' Group Discussion in Conversation Class 被引量:1
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作者 Cuiyun Cai 《Sino-US English Teaching》 2005年第11期75-78,共4页
This article makes an investigation of 114 English majors' level of a particular communicative performance and the general ability to perform in small-group conversations in their conversation class, and thereafter e... This article makes an investigation of 114 English majors' level of a particular communicative performance and the general ability to perform in small-group conversations in their conversation class, and thereafter explores the reasons for their current level with the aid of questionnaire based on a rating scale, together with observation and interviews. Some countermeasures are provided to call for teachers' attention in their teaching practice. 展开更多
关键词 INTERACTION small group interaction COUNTERMEASURES
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Authenticity and College Oral English Teaching
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作者 WANG Dong-mei AN Xue-hua 《Sino-US English Teaching》 2013年第5期373-377,共5页
This paper aims to explore how to bring authenticity into oral English class. By discussing a number of conversational features which are prominent in every day interaction, but are lacking in the standard English mat... This paper aims to explore how to bring authenticity into oral English class. By discussing a number of conversational features which are prominent in every day interaction, but are lacking in the standard English material our students are learning every day, we suggest that everyday conversation is different from standard written English, so taking standard written English as a model in our oral English class is not feasible. We believe that applying CL (corpus linguistics) and CA (conversation analysis) into oral English classroom to design the learning material and classroom tasks is a good way to enhance the authenticity of language learning. 展开更多
关键词 AUTHENTICITY oral English teaching CA (conversation analysis) CL (corpus linguistics)
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A New Way of Teaching Listening---- A Combination of Seeing, Listening and Speaking
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作者 Xiaomei Xu 《Sino-US English Teaching》 2004年第4期23-29,共7页
Comprehending speaking materials in a foreign language is one of the most difficult tasks and one of the most useful skills in foreign language teaching. But for many years listening skills have not received the prior... Comprehending speaking materials in a foreign language is one of the most difficult tasks and one of the most useful skills in foreign language teaching. But for many years listening skills have not received the priority it deserves in language teaching. A traditional listening lesson often tends to test listening rather than teach it and does not practice the kind of listening that takes place in real life. This paper explores a communicative way of teaching listening--a combination of seeing, listening and speaking. The new teaching approach can inspire learners' interest, help learners develop a better awareness of how to listen, build up their skills and strategies in listening and prepare them to deal with the demands of real world communication. The present study attempts to measure the effectiveness of and student reaction to the new approach to teaching listening. 展开更多
关键词 communicative principles classroom tasks three-stage format
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Survey of High School English Teachers' Pragmatic Failure
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作者 Dong He 《Sino-US English Teaching》 2006年第5期59-69,共11页
According to the principals of the Course Standard of English for Ordinary Senior Schools, published by China Education Ministry in 2001, the general goal of English curriculum on the basic education stage is to foste... According to the principals of the Course Standard of English for Ordinary Senior Schools, published by China Education Ministry in 2001, the general goal of English curriculum on the basic education stage is to foster the students' cross-cultural awareness, which is to develop their cross-cultural communicative competence. To achieve this goal, most of all, teachers of English at high school must have a good command of cross-cultural pragmatic competence. By looking through papers in various periodicals and the Internet, the writer finds that most of the studies have coped with pragmatic failures of ESL students but few of ESL teachers'. Therefore, this thesis studies the present situation --- how much do schoolteachers of English know about pragmatics? What about their cross-cultural communicative competence? Can they communicate with the native speakers fluently and appropriately? What are the most serious problems among them in pragmatics? What can be done to solve the problems? With all the questions, this research has collected considerable firsthand data and information. Only after the basic situations are known overall, can actions be taken to solve the problems existing in everyday ESL teaching. So this research is necessary and urgent for the present basic English pedagogy. However, since the present writer's ability and research conditions are limited, it is not possible to make a wider investigation in many places. Therefore, the district --- Bameng League, Inner Mongolia, China, is selected as the basic range of the survey, the situation of which is believed to be able to represent the basic educational ones in the poor and remote districts in the north and the west of China where education is more backward. The questionnaire consists of two parts: a table of individual information and a test paper. The former investigates informants' basic information, including the items of name, age, sex, teaching age, title of the technical post, degree, academic career, college or university that they graduated from, working unit, grades for teaching and the others. The latter is the test paper cited from He Ziran and Yan Zhuang (1986), that is, Chinese Students'Pragmatic Failure in English Communication --- Survey of the Pragmatic Difference between Chinese and English. And it contains 48 items, with items of pragmalinguistic and socio-pragmatic competence mixedly arranged. 120 of the questionnaire copies were handed out and 86 are collected, but only 64 are collected. The survey covers over 10 high schools in all the 7 banners of Bameng League, including two autonomous region-class key schools and five other league-class key schools. After the investigation, the present writer carefully corrects, marks, arranges, summarizes and analyzes the questionnaire, and obtains plenty of firsthand data and information. Then some conclusions have been drawn based on the data analysis. The result of the survey shows that linguistic competence is not equal to pragmatic competence, that ESL high school English teachers may use English rather fluently, without many mistakes in vocabulary and grammar,but it does not necessarily mean that they can use the target language appropriately to communicate with native speakers without pragmatic failures, and that the informants' knowledge of pragmatics and their pragmatic competence are rather poor. As a result, improving their knowledge and competence in pragmatics becomes a very necessary and urgent task to develop the quality of ELT in basic educational stages. In order to solve the above problems, the writer makes some suggestions as follows: (1) Pragmatics should be required as an essential course for the English majors in colleges and universities, especially in normal colleges and universities; (2) In-service high school English teachers must study courses of pragmatics and cross-cultural communication; (3) In some poor and remote districts, if educational conditions don't permit, textbooks of pragmatics and cross-cultural communication must be handed out to the high school English teachers who can study by themselves, then tests are regularly held for them and certificates will be given to those who have passed the tests; (4) In some developed districts, if conditions permit, English teachers can be sent abroad to English-speaking countries for further education in order to have a good command of the English language in the authentic contexts; (5) Modern multiple medias, such as VCD or DVD videos, TV or radio programs, the Internet, should be widely and frequently applied to training teachers; (6) More native language teachers and experts from English-speaking countries must be invited to high schools to train teachers of English. 展开更多
关键词 High school teachers of English pragmatic failure cross-cultural communicative competence speech acts
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Case study on the communicative competence of Chinese students
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作者 YING Sheng 《Sino-US English Teaching》 2007年第7期67-74,共8页
This study investigates the communicative competence of Chinese students in a British university, and the main purposes of the study are to find out more about Chinese students' difficulties in communication and to e... This study investigates the communicative competence of Chinese students in a British university, and the main purposes of the study are to find out more about Chinese students' difficulties in communication and to explore learning strategies of developing communicative competence. The research results show that Chinese students had both linguistic and socio-cultural problems in communication. Two case studies are presented of good and less good communicators to show up different patterns of communicative performance and learning strategies. In conclusion, a range of findings support the statement that attitudes, motivation and immersion were important in the development of communicative competence. 展开更多
关键词 communicative competence academic study everyday life ATTITUDE MOTIVATION
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A Unique and Vivid Way to Oral Class: KISS KIM
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作者 Zhengshun Han 《Sino-US English Teaching》 2005年第2期79-81,共3页
This paper introduces a new, unique, and vivid way of oral class teaching methods: KISS KIM, based on the author's rich teaching experience and profound theoretical reflections in an attempt to share some knowledge ... This paper introduces a new, unique, and vivid way of oral class teaching methods: KISS KIM, based on the author's rich teaching experience and profound theoretical reflections in an attempt to share some knowledge on this respect with other fellow colleagues. 展开更多
关键词 KISS KIM oral communication emblem
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爆破重启后注册检查程序:英语会话精灵
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作者 牛渊 《黑客防线》 2004年第06S期57-58,共2页
现在学习英语口语的软件真是层出不穷.有“轻轻松松学口语”.“英语八哥”、“单词超人”等等.实在是太多。但我觉得这么多英语口语软件中还属“英语会话精灵”较出色,因为它是一款非常方便.高效的英语会话学习软件,其中包含12大... 现在学习英语口语的软件真是层出不穷.有“轻轻松松学口语”.“英语八哥”、“单词超人”等等.实在是太多。但我觉得这么多英语口语软件中还属“英语会话精灵”较出色,因为它是一款非常方便.高效的英语会话学习软件,其中包含12大类1900余句经典实用的英语会话例句。 展开更多
关键词 英语会话学习软件 “英语会话精灵” 应用软件 计算机
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Exploring the Link Between Topic Initiation and Chinese Learner Involvement in NS-NNS Casual Conversations
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作者 刘萍萍 《Chinese Journal of Applied Linguistics》 2012年第2期189-211,256,257,共25页
This paper reports on a case study which explored Chinese L2 learners' conversational involvement in NS-NNS interaction in a study-abroad context. In particular, the study investigated the possible link between topic... This paper reports on a case study which explored Chinese L2 learners' conversational involvement in NS-NNS interaction in a study-abroad context. In particular, the study investigated the possible link between topic initiation and conversational involvement examined under the commonly identified topic genres in casual conversations, including "observation", "opinion seeking/providing", "story-telling", "chat" topics and "gossip". The findings show differences in the choices of topic initiation between the NS English group and the NNS Chinese group. Further analysis found that the participants' topic initiations did not necessarily lead to their active conversational involvement and suggests that the mere fact of getting involved in a topic does not always produce a sense of shared common ground between/among the conversationalists. The positive link between topic initiation and conversational involvement (such as in "observation"), and its impact upon L2 learners are also discussed in this study, confirming the social constructionist view that social roles and interpersonal relations are created and recreated at a micro-level in everyday discourse. 展开更多
关键词 NS-NNS conversation topic initiation learner involvement topic genre
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