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科研机构
北京大学 [1412]
内容类型
期刊论文 [911]
其他 [478]
会议论文 [23]
发表日期
2017 [77]
2016 [130]
2015 [146]
2014 [105]
2013 [123]
2012 [106]
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专题:北京大学
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Bioavailability of Soil-Sorbed Tetracycline to Escherichia coli under Unsaturated Conditions
期刊论文
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2017
Chen, Zeyou
;
Zhang, Wei
;
Wang, Gang
;
Zhang, Yingjie
;
Gao, Yanzhen
;
Boyd, Stephen A.
;
Teppen, Brian J.
;
Tiedje, James M.
;
Zhu, Dongqiang
;
Li, Hui
收藏
  |  
浏览/下载:5/0
  |  
提交时间:2017/12/03
ANTIMICROBIAL RESISTANCE GENES
NON-XEROPHILIC FUNGI
ANTIBIOTIC-RESISTANCE
VADOSE ZONE
AGRICULTURAL SOILS
ORGANIC POLLUTANTS
AGAR MEDIA
WATER
TRANSPORT
SORPTION
基于社交网络签到数据的城市空间相互作用和节点吸引力研究
期刊论文
北京大学学报 自然科学版, 2017
贺泽亚
;
吴必虎
;
刘瑜
收藏
  |  
浏览/下载:13/0
  |  
提交时间:2017/12/03
地理位置签到
空间相互作用
引力模型
节点吸引力
优化粒子群法(PSO)
location-based
check-in
spatial interaction
gravity model
nodal attraction
PSO
Spatial-temporal and multi-media variations of polycyclic aromatic hydrocarbons in a highly urbanized river from South China
期刊论文
SCIENCE OF THE TOTAL ENVIRONMENT, 2017
Zhang, Di
;
Wang, Jun-Jian
;
Ni, Hong-Gang
;
Zeng, Hui
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2017/12/03
PAHs
Urban river
Spatial-temporal variation
Multi-media transport
Similarity analysis
ECOLOGICAL RISK-ASSESSMENT
SUSPENDED PARTICULATE MATTER
SURFACE SEDIMENTS
PEARL RIVER
YANGTZE-RIVER
SOURCE APPORTIONMENT
ESTUARINE SEDIMENTS
SONGHUA RIVER
YELLOW-RIVER
PAHS
Extraction and analysis of city's tourism districts based on social media data
期刊论文
COMPUTERS ENVIRONMENT AND URBAN SYSTEMS, 2017
Shao, Hu
;
Zhang, Yi
;
Li, Wenwen
收藏
  |  
浏览/下载:112/0
  |  
提交时间:2017/12/03
Tourism district
Social media
Spatial-temporal behavior
DESTINATION
NETWORKS
TRACKING
COMMUNITIES
SINGAPORE
IDENTIFICATION
ORGANIZATION
LOCATION
EXAMPLE
WORLD
Classifying natural-language spatial relation terms with random forest algorithm
期刊论文
INTERNATIONAL JOURNAL OF GEOGRAPHICAL INFORMATION SCIENCE, 2017
Du, Shihong
;
Wang, Xiaonan
;
Feng, Chen-Chieh
;
Zhang, Xiuyuan
收藏
  |  
浏览/下载:8/0
  |  
提交时间:2017/12/03
Natural-language spatial relations
topological terms
metric variables
random forest
social media data
geographical information retrieval
METRIC DETAILS
SOCIAL MEDIA
OBJECTS
INFORMATION
Further study of Late Devonian seed plant Cosmosperma polyloba: its reconstruction and evolutionary significance
期刊论文
BMC EVOLUTIONARY BIOLOGY, 2017
Liu, Le
;
Wang, Deming
;
Meng, Meicen
;
Xue, Jinzhuang
收藏
  |  
浏览/下载:9/0
  |  
提交时间:2017/12/03
Cosmosperma polyloba
Frond
Ovule
Pollen organ
Seed plant
Late Devonian
Wutong Formation
South China
SP-NOV.
ZHEJIANG PROVINCE
SOUTH CHINA
GEN.
PTERIDOSPERM
CHANGXINGIA
AFFINITIES
IRELAND
ORGAN
FERNS
Exploring inter-country connection in mass media: A case study of China
期刊论文
COMPUTERS ENVIRONMENT AND URBAN SYSTEMS, 2017
Yuan, Yihong
;
Liu, Yu
;
Wei, Guixing
收藏
  |  
浏览/下载:6/0
  |  
提交时间:2017/12/03
Time series
Inter-country relations
Spatio-temporal data mining
Mass media events
GDELT
HUMAN MOBILITY PATTERNS
BEHAVIOR
MODEL
A Novel Popular Tourist Attraction Discovering Approach Based on Geo-Tagged Social Media Big Data
期刊论文
ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION, 2017
Peng, Xia
;
Huang, Zhou
收藏
  |  
浏览/下载:5/0
  |  
提交时间:2017/12/03
social media
geographical big data
tourist attraction
popularity analysis
PHOTOS
承压含水层应力场与井水位变化的数值模拟
期刊论文
北京大学学报 自然科学版, 2017
谢雨晴
;
赵永红
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2017/12/03
井水位
渗流
应力场变化
groundwater level
permeation
variation of stress field
Social Media: New Perspectives to Improve Remote Sensing for Emergency Response
期刊论文
PROCEEDINGS OF THE IEEE, 2017
Li, Jun
;
He, Zhi
;
Plaza, Javier
;
Li, Shutao
;
Chen, Jinfen
;
Wu, Henglin
;
Wang, Yandong
;
Liu, Yu
收藏
  |  
浏览/下载:5/0
  |  
提交时间:2017/12/03
Deep learning
emergency response
remote sensing
social media
VOLUNTEERED GEOGRAPHIC INFORMATION
CONVOLUTIONAL NEURAL-NETWORKS
LANDSAT TM DATA
DISASTER MANAGEMENT
EVENT DETECTION
BIG DATA
IMAGE CLASSIFICATION
OBJECT DETECTION
FLOOD
GIS
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