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科研机构
北京大学 [50]
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期刊论文 [45]
其他 [5]
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2017 [7]
2016 [5]
2015 [6]
2014 [3]
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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
Post-fire dispersal characteristics of charcoal particles in the Daxing'an Mountains of north-east China and their implications for reconstructing past fire activities
期刊论文
INTERNATIONAL JOURNAL OF WILDLAND FIRE, 2017
Li, Yiyin
;
Xu, Xin
;
Zhao, Pengfei
收藏
  |  
浏览/下载:5/0
  |  
提交时间:2017/12/03
biomass burning
larch forest
wildfire
FOREST-FIRE
MACROSCOPIC CHARCOAL
MICROSCOPIC CHARCOAL
HOLOCENE FIRE
SOURCE AREA
RECORDS
DEPOSITION
REGIMES
BOREAL
HISTORY
In vitro Dosimetric Study of Biliary Stent Loaded with Radioactive I-125 Seeds
其他
2017-01-01
Yao, Li-Hong
;
Wang, Jun-Jie
;
Shang, Charles
;
Jiang, Ping
;
Lin, Lei
;
Sun, Hai-Tao
;
Liu, Lu
;
Liu, Hao
;
He, Di
;
Yang, Rui-Jie
收藏
  |  
浏览/下载:8/0
  |  
提交时间:2017/12/03
Brachytherapy
Computer Simulation
Phantom
Radiometry
Thermoluminescent Dosimetry
RADIOTHERAPY DOSE PERTURBATION
MALIGNANT OBSTRUCTIVE-JAUNDICE
BILE-DUCT CARCINOMA
INTRALUMINAL BRACHYTHERAPY
RADIATION-THERAPY
ESOPHAGEAL STENTS
TRACT CANCER
MODEL
TRIAL
RECOMMENDATIONS
Characteristics and source distribution of air pollution in winter in Qingdao, eastern China
期刊论文
ENVIRONMENTAL POLLUTION, 2017
Li, Lingyu
;
Yan, Dongyun
;
Xu, Shaohui
;
Huang, Mingli
;
Wang, Xiaoxia
;
Xie, Shaodong
收藏
  |  
浏览/下载:4/0
  |  
提交时间:2017/12/03
Air pollution
Source
Trajectory
PSCF/CWT
Eastern China
PEARL RIVER DELTA
PARTICULATE MATTER
CARBONACEOUS AEROSOL
SOURCE APPORTIONMENT
SURFACE OZONE
PM2.5
HAZE
CITIES
POLLUTANTS
LEVEL
Simultaneous measurements of new particle formation at 1 s time resolution at a street site and a rooftop site
期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2017
Zhu, Yujiao
;
Yan, Caiqing
;
Zhang, Renyi
;
Wang, Zifa
;
Zheng, Mei
;
Gao, Huiwang
;
Gao, Yang
;
Yao, Xiaohong
收藏
  |  
浏览/下载:5/0
  |  
提交时间:2017/12/03
SECONDARY ORGANIC AEROSOL
NUCLEATION MODE PARTICLES
DUTY DIESEL-ENGINE
SULFURIC-ACID
ULTRAFINE PARTICLES
SIZE DISTRIBUTION
ATMOSPHERIC PARTICLES
PARTICULATE MATTER
MAJOR HIGHWAY
BLACK CARBON
Generating high-yield positrons and relativistic collisionless shocks by 10 PW laser
期刊论文
LASER AND PARTICLE BEAMS, 2017
Jiao, J.
;
Zhang, B.
;
Yu, J.
;
Zhang, Z.
;
Yan, Y.
;
He, S.
;
Deng, Z.
;
Teng, J.
;
Hong, W.
;
Gu, Y.
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2017/12/03
Laser-plasma interaction
Positron production
Relativistic collisionless shock
10 PW laser
PARTICLE-ACCELERATION
PULSES
CODE
Excitation of surface plasmon polaritons by electron beam with graphene ribbon arrays
期刊论文
JOURNAL OF APPLIED PHYSICS, 2017
Liu, Yong-Qiang
;
Liu, Pu-Kun
收藏
  |  
浏览/下载:34/0
  |  
提交时间:2017/12/03
WAVE-GUIDE
TERAHERTZ
METAMATERIALS
HYBRIDIZATION
ABSORPTION
Identification of concentrations and sources of PM2.5-bound PAHs in North China during haze episodes in 2013
期刊论文
AIR QUALITY ATMOSPHERE AND HEALTH, 2016
Lu, Wei
;
Yang, Lingxiao
;
Chen, Jianmin
;
Wang, Xinfeng
;
Li, Hao
;
Zhu, Yanhong
;
Wen, Liang
;
Xu, Caihong
;
Zhang, Junmei
;
Zhu, Tong
;
Wang, Wenxing
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2017/12/03
Polycyclic aromatic hydrocarbons
Source
Haze episode
POLYCYCLIC AROMATIC-HYDROCARBONS
EXTRACTABLE ORGANIC-COMPOUNDS
SOURCE APPORTIONMENT
PARTICULATE MATTER
SEASONAL-VARIATION
MOLECULAR TRACERS
RISK-ASSESSMENT
HONG-KONG
ROAD DUST
URBAN
Studies on novel terahertz electronic sources based on doubly-corrugated metasurfaces
其他
2016-01-01
Liu, Yong-Qiang
;
Kong, Ling-Bao
;
Liu, Pu-Kun
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2017/12/03
Elastic hydrogel as a sensor for detection of mechanical stress generated by single cells grown in three-dimensional environment
期刊论文
BIOMATERIALS, 2016
Huang, Jianyong
;
Wang, Liangli
;
Xiong, Chunyang
;
Yuan, Fan
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2017/12/03
Elastic hydrogels
Cell growth
Mechanical microenvironment
Mechanobiology
Mechanotransduction
TRACTION FORCE MICROSCOPY
TISSUE MORPHOGENESIS
VOLUME REGULATION
FOCAL ADHESIONS
MECHANOTRANSDUCTION
SHAPE
MECHANOBIOLOGY
STIFFNESS
DYNAMICS
MATRIX
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