检索结果-南通市图书馆

The Accuracy Analysis of Zero-lag Correlation Coefficient of Dual-Polarization Radar

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2015年第1期24卷 212-217页

作者： ZHANG Wenwen yin fulian JIA Yunfeng Beijing Aerospace System Engineering Institute Information Engineering School Communication University of China

Dual polarization technology is gradually promoted in our country after Doppler weather radar network. It extends the capabilities of conventional Doppler radar, and can directly detect the differential reflectivity factor and the zero-lag correlation coefficient and so on which are related with the micro-physics characteristics of precipitation. Considering that small error may lead to erroneous judgments when identify the particle phase state with the zero-lag correlation coefficient for its values is close to each other at different phase states and is between0 and 1, the error mean value and mean square root of the zero-lag correlation coefficient are deduced at alternative transmission mode, and each parameter’s effect to the precision is analyzed. It not only provides a useful polarization variable for better identifying hydrometer phase state and clutter recognition, but also provides an practical way to estimate the zero-lag correlation coefficient and relevant.

关键词： Dual polarization Doppler radar Alternative transmission Correlation coefficient Measurement accuracy.

The Effect of Send/Receive Dual Channel Parameters on Polarization Parameters Measurement

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2017年第2期26卷 336-344页

作者： ZHANG Wenwen yin fulian CHAI Juanfang BAI Xuesong Beijing Aerospace System Engineering Institute Information Engineering School Communication University of China Shanghai Electromechanical Engineering Institute

The dual-linear polarization radar is what China will popularize gradually following the Doppler radar *** the Doppler radar technology,the dual-linear polarization radar,which has been widely applied to enhancing modem weather radar system,becomes more and more popular in *** characteristics of hydrometeors,such as differential reflectivity,specific differential phase,and zero-lag correlation coefficient,are usually provided by the *** by the angular orientation of the feed,drop canting,and backscatter depolarization,however,inevitable measurement errors exit because of the unwanted horizontal and vertical wave *** small errors in these sensitive parameters may lead to erroneous judgment,both the factors themselves and their weights of influence should be studied specifically,with the mode of simultaneous transmission and reception of horizontally and vertically polarized *** study provides theoretical basis for the design of dual polarization Doppler radar,and will be helpful in the research of cloud,precipitation physics,and weather modification.

关键词： Doppler radar Dual-polarization technology Weather modification Elliptically polarized light Send/receive

Enhancing Embedding-Based Chinese Word Similarity Evaluation with Concepts and Synonyms Knowledge

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2020年第8期124卷 747-764页

作者： fulian yin Yanyan Wang Jianbo Liu Meiqi Ji Communication University of China Beijing100024China

Word similarity(WS)is a fundamental and critical task in natural language *** approaches to WS are mainly to calculate the similarity or relatedness of word pairs based on word embedding obtained by massive and high-quality ***,it may suffer from poor performance for insufficient corpus in some specific fields,and cannot capture rich semantic and sentimental *** address these above problems,we propose an enhancing embedding-based word similarity evaluation with character-word concepts and synonyms knowledge,namely EWS-CS model,which can provide extra semantic information to enhance word similarity *** core of our approach contains knowledge encoder and word *** knowledge encoder,we incorporate the semantic knowledge extracted from knowledge resources,including character-word concepts,synonyms and sentiment lexicons,to obtain knowledge *** encoder is to learn enhancing embedding-based word representation from pre-trained model and knowledge representation based on similarity ***,compared with baseline models,the experiments on four similarity evaluation datasets validate the effectiveness of our EWS-CS model in WS task.

关键词： Word representation concepts and synonyms knowledge word similarity information security

Improve Chinese Aspect Sentiment Quadruplet Prediction via Instruction Learning Based on Large Generate Models

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第3期78卷 3391-3412页

作者： Zhaoliang Wu Yuewei Wu Xiaoli Feng Jiajun Zou fulian yin College of Information and Communication Engineering Communication University of ChinaBeijing100024China The State Key Laboratory of Media Convergence and Communication Communication University of ChinaBeijing100024China Department of Electronic Engineering Tsinghua UniversityBeijing100084China

Aspect-Based Sentiment Analysis(ABSA)is a fundamental area of research in Natural Language Processing(NLP).Within ABSA,Aspect Sentiment Quad Prediction(ASQP)aims to accurately identify sentiment quadruplets in target sentences,including aspect terms,aspect categories,corresponding opinion terms,and sentiment ***,most existing research has focused on English ***,while ASQP has seen significant progress in English,the Chinese ASQP task has remained relatively *** inspiration from methods applied to English ASQP,we propose Chinese generation templates and employ prompt-based instruction learning to enhance the model’s understanding of the task,ultimately improving ASQP performance in the Chinese ***,under the same pre-training model configuration,our approach achieved a 5.79%improvement in the F1 score compared to the previously leading ***,when utilizing a larger model with reduced training parameters,the F1 score demonstrated an 8.14%***,we suggest a novel evaluation metric based on the characteristics of generative models,better-reflecting model *** results validate the effectiveness of our approach.

关键词： ABSA ASQP LLMs sentiment analysis Chinese comments

Syntax-Based Aspect Sentiment Quad Prediction by Dual Modules Neural Network for Chinese Comments

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第5期75卷 2873-2888页

作者： Zhaoliang Wu Shanyu Tang Xiaoli Feng Jiajun Zou fulian yin College of Information and Communication Engineering Communication University of ChinaDingfuzhuang East Street No.1Beijing100024China Cybersecurity and Criminology Centre University of West LondonSt.Mary’s RoadLondon W55RFLondonUK Department of Electronic Engineering Tsinghua UniversityShuangqing Road No.30Beijing100084China The State Key Laboratory of Media Convergence and Communication Communication University of ChinaDingfuzhuang East Street No.1Beijing100024China

Aspect-Based Sentiment Analysis(ABSA)is one of the essential research in the field of Natural Language Processing(NLP),of which Aspect Sentiment Quad Prediction(ASQP)is a novel and complete *** aims to accurately recognize the sentiment quad in the target sentence,which includes the aspect term,the aspect category,the corresponding opinion term,and the sentiment polarity of ***,existing approaches lack knowledge of the sentence’s syntax,so despite recent innovations in ASQP,it is poor for complex cyber comment ***,most research has focused on processing English text,and ASQP for Chinese text is almost *** usage is more casual than English,and individual characters contain more *** propose a novel syntactically enhanced neural network framework inspired by syntax knowledge enhancement strategies in other NLP *** this framework,part of speech(POS)and dependency trees are input to the model as auxiliary information to strengthen its cognition of Chinese text ***,we design a relation extraction module,which provides a bridge for the overall extraction of the framework.A comparison of the designed experiments reveals that our proposed strategy outperforms the previous studies on the key metric *** experiments demonstrate that the auxiliary information added to the framework improves the final performance in different ways.

关键词： ABSA ASQP sentiment analysis Chinese comments

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

数字电视节目推荐系统结构及推荐算法研究

高技术通讯 2014年第7期24卷 677-683页

作者：殷复莲柴剑平高雅中国传媒大学信息工程学院北京100024

针对数字电视信息过载问题进行了数字电视节目推荐系统的结构和推荐算法研究。构造了包含信息摄取单元、系统分析单元和推荐信息发送单元的数字电视节目推荐系统结构。提出了节目类型分析法,采用节目类型阈值和节目类型聚类两种形式,分... 详细信息

针对数字电视信息过载问题进行了数字电视节目推荐系统的结构和推荐算法研究。构造了包含信息摄取单元、系统分析单元和推荐信息发送单元的数字电视节目推荐系统结构。提出了节目类型分析法,采用节目类型阈值和节目类型聚类两种形式,分别实现了根据经验值的人工分级和任意簇数的自动聚类,达到了有效寻找观众收视兴趣与所观看节目之间的联系的效果。提出了收视行为分析法,采用收视个体行为分析和收视群体行为分析两种形式,通过观众收视数据推测观众收视兴趣,实现了给观众个体或群体推荐感兴趣的电视节目的目的。

关键词：数字电视节目推荐系统节目类型分析收视行为分析

环境影响下社会热点事件传播干预模型构建与分析

在线全文

学校读者我要写书评

暂无评论

情报科学 2024年第5期42卷 21-34页

作者：殷复莲王锦霞潘妍妍中国传媒大学媒体融合与传播国家重点实验室北京100024 中国传媒大学信息与通信工程学院北京100024

【目的/意义】融合信息传播环境因素,从网络信息传播动力学的角度分析观点迁移规律、完善舆情传播机制,提供政府、媒体等外部环境干预下的舆情引导建议,更有针对性地优化当前舆情生态治理系统。【方法/过程】本研究在传统信息传播动力... 详细信息

【目的/意义】融合信息传播环境因素,从网络信息传播动力学的角度分析观点迁移规律、完善舆情传播机制,提供政府、媒体等外部环境干预下的舆情引导建议,更有针对性地优化当前舆情生态治理系统。【方法/过程】本研究在传统信息传播动力学模型的基础上,分析环境因素对舆论引导方向的关键作用,将意识形态和观点作为不同的导向构建干预动力学模型。进一步地,使用舆情事件的真实传播数据进行动力学分析,对所构建的干预模型开展多角度敏感性分析实验。【结果/结论】本研究模型的干预参数能够明显改变舆情事件的观点扩散态势,且对原始传播过程中传播规模较小的观点方向影响程度更大;从微观数据层面折射现实舆情规律,为监管部门建设有数据支撑的舆论干预理论体系。【创新/局限】针对不同场景下的热点事件提出了两种考虑信息传播环境因素的舆情干预模型,将多方主体的干预作用进行抽象化公式表示,合理地融入多场景舆情传播动力学模型,能够更为全面地进行舆情干预。

关键词：信息传播动力学模型环境因素舆情干预复杂网络

在线全文

学校读者我要写书评

暂无评论

电视节目播前播中播后跨平台评价方法研究

电视技术 2016年第4期40卷 121-126,134页

作者：白雪松殷复莲柴剑平中国传媒大学信息工程学院北京100024

鉴于传统的节目综合评价体系只含播前和播后两个阶段而缺少播中评价,并且存在数据来源单一或新媒体未突出、调查打分等方式带来的高时间成本等问题,提出了电视节目播前播中播后跨平台评价方案,数据采集于有线电视、视频网站等多个平台,... 详细信息

鉴于传统的节目综合评价体系只含播前和播后两个阶段而缺少播中评价,并且存在数据来源单一或新媒体未突出、调查打分等方式带来的高时间成本等问题,提出了电视节目播前播中播后跨平台评价方案,数据采集于有线电视、视频网站等多个平台,采用优选对比的思路、多元线性回归法进行播前评价;开展以节目收视用户数、观众流动分析、微博词云分析为主的播中评价,扩充了原有评价体系;完成基于主成分分析法、层次分析法等6种主客观结合的方法来计算综合指数的播后评价,有效避免了传统调查打分等方式带来的可操作性和时效性的降低。

关键词：节目评价播前播中播后跨平台综合指数

跨学科视域下工程类专业本科人才培养:以中国传媒大学人工智能专业为例

在线全文

学校读者我要写书评

暂无评论

中国新闻传播研究 2021年第6期 218-229页

作者：殷复莲王爽章文辉中国传媒大学信息与通信工程学院

高等工程教育发展进入了新阶段,成为国际关注的焦点。本文首先调研了国内外高等院校高等工程教育改革经验,进一步指出了我国高等院校工程类人才培养存在的普遍问题;在此基础上,围绕高等教育人才培养的三个根本问题,本文尝试给出了高等... 详细信息

高等工程教育发展进入了新阶段,成为国际关注的焦点。本文首先调研了国内外高等院校高等工程教育改革经验,进一步指出了我国高等院校工程类人才培养存在的普遍问题;在此基础上,围绕高等教育人才培养的三个根本问题,本文尝试给出了高等工程教育人才培养模式改革的着力要素和实施路径,包括"课程"要素、"项目"要素、"学生"要素以及"教师"要素;接下来,本文将中国传媒大学人工智能专业作为典型案例,探讨其将传媒特色融入人工智能专业人才培养的可行性,以期为高等工程教育人才培养模式改革提供参考。

关键词：高等工程教育人工智能本科人才培养跨学科传媒