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科研机构
北京大学 [370]
内容类型
期刊论文 [295]
其他 [66]
会议论文 [9]
发表日期
2017 [25]
2016 [35]
2015 [34]
2014 [35]
2013 [25]
2012 [20]
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专题:北京大学
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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
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
Understanding the effects of administrative boundary in sampling spatially embedded networks
期刊论文
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, 2017
Chi, Guanghua
;
Liu, Yu
;
Shi, Li
;
Gao, Yong
收藏
  |  
浏览/下载:7/0
  |  
提交时间:2017/12/03
Spatially embedded network
Sampled network
Administrative boundary
MOBILE PHONE DATA
SOCIAL NETWORKS
MISSING DATA
Mean field study of a propagation-turnover lattice model for the dynamics of histone marking
其他
2017-01-01
Yao Fan
;
Li Fangting
;
Li Tiejun
收藏
  |  
浏览/下载:5/0
  |  
提交时间:2017/12/03
histone marking
contact process
mean field approximation
boundary layer analysis
Mean field study of a propagation-turnover lattice model for the dynamics of histone marking
其他
2017-01-01
Yao, Fan
;
Li, FangTing
;
Li, TieJun
收藏
  |  
浏览/下载:7/0
  |  
提交时间:2017/12/03
histone marking
contact process
mean field approximation
boundary layer analysis
EPIGENETIC STATES
LYSINE 9
METHYLATION
CHROMATIN
HP1
HETEROCHROMATIN
CELLS
H3
MECHANISM
MEMORY
LINEAR DAMPING OF ALFVEN WAVES BY PHASE MIXING
其他
2017-01-01
Ren, Siqi
;
Zhao, Weiren
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2017/12/03
linear damping
Alfven waves
incompressible MHD equations
MHD EQUATIONS
HYDRODYNAMIC STABILITY
ASYMPTOTIC STABILITY
MAGNETIC DIFFUSION
EULER EQUATIONS
2D EULER
EXISTENCE
DECAY
FIELD
A pomegranate-structured sulfur cathode material with triple confinement of lithium polysulfides for high-performance lithium-sulfur batteries
期刊论文
JOURNAL OF MATERIALS CHEMISTRY A, 2017
Mi, Yingying
;
Liu, Wen
;
Wang, Qian
;
Jiang, Jianbing
;
Brudvig, Gary W.
;
Zhou, Henghui
;
Wang, Hailiang
收藏
  |  
浏览/下载:6/0
  |  
提交时间:2017/12/03
LI-S BATTERIES
TITANIUM NITRIDE
GRAPHENE
PROSPECTS
REDOX
CELLS
High-performance Li-S battery cathode with catalyst-like carbon nanotube-MoP promoting polysulfide redox
期刊论文
NANO RESEARCH, 2017
Mi, Yingying
;
Liu, Wen
;
Li, Xiaolin
;
Zhuang, Julia
;
Zhou, Henghui
;
Wang, Hailiang
收藏
  |  
浏览/下载:10/0
  |  
提交时间:2017/12/03
lithium-sulfur battery
metal phosphide
lithium polysulfide
long cycle
LITHIUM-SULFUR BATTERIES
PROSPECTS
Preparing, Characterizing, and Investigating Luminescent Properties of a Series of Long-Lasting Phosphors in a SrO-Al2O3 System: An Integrated and Inquiry-Based Experiment in Solid State Chemistry for the Undergraduate Laboratory
期刊论文
JOURNAL OF CHEMICAL EDUCATION, 2017
Ma, Yan-Zi
;
Jia, Li
;
Ma, Kai-Guo
;
Wang, Hai-Hong
;
Jing, Xi-Ping
收藏
  |  
浏览/下载:4/0
  |  
提交时间:2017/12/03
Second-Year Undergraduate
Inorganic Chemistry
Laboratory Instruction
Hands-On Learning/Manipulatives
Inquiry-Based/Discovery Learning
Crystal Field/Ligand Field Theory
Fluorescence Spectroscopy
Materials Science
Phases/Phase Transitions/Diagrams
Solid State Chemistry
DY3+ PHOSPHOR
MICROWAVE SYNTHESIS
EU2+
SRAL2O4EU2+
MECHANISM
Structural correlation between Ba3Si6O12N2 and Ba3Si6O9N4 and the luminescent properties Eu2+ doped Ba3Si6O9N4
期刊论文
JOURNAL OF ALLOYS AND COMPOUNDS, 2017
Wei, Heng-Wei
;
Wang, Xiao-Ming
;
Jiao, Huan
;
Jing, Xi-Ping
收藏
  |  
浏览/下载:4/0
  |  
提交时间:2017/12/03
Ba3Si6O12N2
Ba3Si6O9N4
Structure
Eu2+
Luminescence
CRYSTAL-STRUCTURE
ENERGY-TRANSFER
GREEN PHOSPHOR
LEDS
BA
CONVERSION
SR
CA
PHOTOLUMINESCENCE
CE3+
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