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北京大学 [23]
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期刊论文 [133]
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Spatio-temporal difference analysis in climate change topics and sentiment orientation: Based on LDA and BiLSTM model
期刊论文
RESOURCES CONSERVATION AND RECYCLING, 2023, 卷号: 188, 页码: 15
作者:
Wu, Meifen
;
Long, Ruyin
;
Chen, Feiyu
;
Chen, Hong
;
Bai, Yun
收藏
  |  
浏览/下载:14/0
  |  
提交时间:2023/02/07
Climate change
Sentiment analysis
Spatio-temporal difference analysis
Text mining
Sina Weibo
Are we working on the safety of UAVs? An LDA-based study of UAV safety technology trends
期刊论文
SAFETY SCIENCE, 2022, 卷号: 152
作者:
Mu, Di
;
Yue, Chaolong
;
Chen, An
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  |  
浏览/下载:0/0
  |  
提交时间:2023/05/22
Unmanned Aerial Vehicle
Safety science
Mechanical accident
Latent Dirichlet Allocation
Qualitative analysis
Are we working on the safety of UAVs? An LDA-based study of UAV safety technology trends
期刊论文
SAFETY SCIENCE, 2022, 卷号: 152
作者:
Mu, Di
;
Yue, Chaolong
;
Chen, An
收藏
  |  
浏览/下载:0/0
  |  
提交时间:2023/05/30
Unmanned Aerial Vehicle
Safety science
Mechanical accident
Latent Dirichlet Allocation
Qualitative analysis
Identifying environmental and health threats in unconventional oil and gas violations: evidence from Pennsylvania compliance reports
期刊论文
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2021, 页码: 15
作者:
Bi, Dan
;
Guo, Ju-E
;
Zhao, Erlong
;
Sun, Shaolong
;
Wang, Shouyang
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  |  
浏览/下载:14/0
  |  
提交时间:2022/04/02
Unconventional oil and gas
Text mining
LDA
Environmental violation
Decision tree
Environment pollution
Trip Purposes Mining From Mobile Signaling Data
期刊论文
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS, 2021, 卷号: 99, 期号: 99, 页码: 13
作者:
Li, Zhishuai
;
Xiong, Gang
;
Wei, Zebing
;
Zhang, Yu
;
Zheng, Meng
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  |  
浏览/下载:42/0
  |  
提交时间:2022/01/27
Cellular networks
Trajectory
Semantics
Unsupervised learning
Supervised learning
Resource management
Public transportation
Trip purpose inference
cellular network data
latent Dirichlet allocation
travel behavior
big data
一种基于知识元迁移的ESI研究前沿知识演进分析方法
期刊论文
情报学报, 2021, 卷号: 40, 期号: 10, 页码: 1027-1042
作者:
孙震
;
冷伏海
收藏
  |  
浏览/下载:13/0
  |  
提交时间:2022/01/26
知识元
研究前沿
语义分析
知识计算
钙钛矿太阳能电池
Bi-TLLDA and CSSVM based fault diagnosis of vehicle on-board equipment for high speed railway
期刊论文
MEASUREMENT SCIENCE AND TECHNOLOGY, 2021, 卷号: 32, 期号: 8
作者:
Wei, Wei
;
Zhao, Xiao-qiang
收藏
  |  
浏览/下载:5/0
  |  
提交时间:2021/10/14
fault diagnosis
vehicle on-board equipment
topic model
text classification
Public Opinions and Concerns Regarding the Canadian Prime Minister's Daily COVID-19 Briefing: Longitudinal Study of YouTube Comments Using Machine Learning Techniques
期刊论文
JOURNAL OF MEDICAL INTERNET RESEARCH, 2021, 卷号: 23, 期号: 2, 页码: 12
作者:
Zheng, Chengda
;
Xue, Jia
;
Sun, Yumin
;
Zhu, Tingshao
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  |  
浏览/下载:22/0
  |  
提交时间:2021/04/19
Canada
PM Trudeau
YouTube
machine learning
big data
infodemiology
infodemic
public concerns
communication
concern
social media
video
Twitter Discussions and Emotions About the COVID-19 Pandemic: Machine Learning Approach
期刊论文
JOURNAL OF MEDICAL INTERNET RESEARCH, 2020, 卷号: 22, 期号: 11, 页码: 14
作者:
Xue, Jia
;
Chen, Junxiang
;
Hu, Ran
;
Chen, Chen
;
Zheng, Chengda
收藏
  |  
浏览/下载:22/0
  |  
提交时间:2021/03/01
machine learning
Twitter data
COVID-19
infodemic
infodemiology
infoveillance
public discussion
public sentiment
Twitter
social media
virus
The Hidden Pandemic of Family Violence During COVID-19: Unsupervised Learning of Tweets
期刊论文
JOURNAL OF MEDICAL INTERNET RESEARCH, 2020, 卷号: 22, 期号: 11, 页码: 11
作者:
Xue, Jia
;
Chen, Junxiang
;
Chen, Chen
;
Hu, Ran
;
Zhu, Tingshao
收藏
  |  
浏览/下载:19/0
  |  
提交时间:2020/12/28
Twitter
family violence
COVID-19
machine learning
big data
infodemiology
infoveillance
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