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科研机构
北京大学 [365]
内容类型
期刊论文 [257]
其他 [91]
会议论文 [17]
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2017 [27]
2016 [47]
2015 [47]
2014 [33]
2013 [24]
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专题:北京大学
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Object-Based Convolutional Neural Network for High-Resolution Imagery Classification
期刊论文
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING, 2017
Zhao, Wenzhi
;
Du, Shihong
;
Emery, William J.
收藏
  |  
浏览/下载:12/0
  |  
提交时间:2017/12/03
Convolutional neural network (CNN)
deep learning
high-resolution image
image classification
SCENE CLASSIFICATION
HYPERSPECTRAL DATA
MULTISCALE
FEATURES
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
Pressure-induced structural and spin transitions of Fe3S4
期刊论文
SCIENTIFIC REPORTS, 2017
Huang, Shengxuan
;
Kang, Duan
;
Wu, Xiang
;
Niu, Jingjing
;
Qin, Shan
收藏
  |  
浏览/下载:5/0
  |  
提交时间:2017/12/03
AUGMENTED-WAVE METHOD
GREIGITE FE3S4
MAGNETIC-PROPERTIES
CRYSTAL-STRUCTURE
FE3O4
COMPRESSIBILITY
TEMPERATURES
POLYMORPHS
STABILITY
SPECTRA
Topological defects in an unconfined nematic fluid induced by single and double spherical colloidal particles
其他
2017-01-01
Wang, Yiwei
;
Zhang, Pingwen
;
Chen, Jeff Z. Y.
收藏
  |  
浏览/下载:6/0
  |  
提交时间:2017/12/03
SATURN-RING DEFECTS
LIQUID-CRYSTALS
POINT-DEFECTS
DISCLINATION LOOPS
FINE-STRUCTURE
FORCES
PHASE
NANOPARTICLES
DISPERSIONS
STABILITY
Defects Around a Spherical Particle in Cholesteric Liquid Crystals
其他
2017-01-01
Tong, Yu
;
Wang, Yiwei
;
Zhang, Pingwen
收藏
  |  
浏览/下载:1/0
  |  
提交时间:2017/12/03
Cholesteric liquid crystal
defects
Landau-de Gennes theory
spectral method
DE-GENNES THEORY
TOPOLOGICAL DEFECTS
NEMATIC EMULSIONS
LANDAU THEORY
BLUE PHASES
A robust periodicity mining method from incomplete and noisy observations based on relative entropy
其他
2017-01-01
Guan, Tao
;
Wang, Ke-ren
;
Zhang, Shao-peng
收藏
  |  
浏览/下载:5/0
  |  
提交时间:2017/12/03
Periodicity detection
Relative entropy
Incomplete observations
Periodic patterns
TIME-SERIES ANALYSIS
SPACED DATA
Strain engineering effect on surprising magnetic semiconducting behavior in zigzag arsenene nanoribbons
期刊论文
COMPUTATIONAL MATERIALS SCIENCE, 2017
Abid, M.
;
Shoaib, Anwer
;
Aslam, Imran
;
Farid, Muhammad Asim
收藏
  |  
浏览/下载:4/0
  |  
提交时间:2017/12/03
Metallic edge states
Edge magnetism
Strain engineering
AFM semiconducting ground state
First principles calculations
BLACK PHOSPHORUS
Beyond carbocations: Synthesis, structure and reactivity of heavier Group 14 element cations
期刊论文
COORDINATION CHEMISTRY REVIEWS, 2017
Fang, Huayi
;
Wang, Zikuan
;
Fu, Xuefeng
收藏
  |  
浏览/下载:7/0
  |  
提交时间:2017/12/03
Main group chemistry
Heavier Group 14 element cation
Synthesis strategy
Structure
Reactivity
FRUSTRATED LEWIS PAIR
MAIN-GROUP ELEMENTS
FREE SILYLIUM ION
ORGANOTIN(II) CATION
CRYSTAL-STRUCTURES
FACILE ACCESS
PENTAMETHYLCYCLOPENTADIENYLSILICON(II) CATION
GERMANIUM(II) DICATIONS
LIVING POLYMERIZATION
DIHYDROGEN ACTIVATION
Diverse configurations of columnar liquid crystals in cylindrical nano-and micropores
期刊论文
SOFT MATTER, 2017
Zhang, Rui-bin
;
Ungar, Goran
;
Zeng, Xiangbing
;
Shen, Zhihao
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2017/12/03
POROUS ALUMINA
NANOCHANNELS
CONFINEMENT
ARRAYS
CHAINS
Self-Assembled Structures of Giant Surfactants Exhibit a Remarkable Sensitivity on Chemical Compositions and Topologies for Tailoring Sub-10 nm Nanostructures
期刊论文
MACROMOLECULES, 2017
Yue, Kan
;
Liu, Chang
;
Huang, Mingjun
;
Huang, Jiahao
;
Zhou, Zhe
;
Wu, Kan
;
Liu, Hao
;
Lin, Zhiwei
;
Shi, An-Chang
;
Zhang, Wen-Bin
;
Cheng, Stephen Z. D.
收藏
  |  
浏览/下载:4/0
  |  
提交时间:2017/12/03
POLYHEDRAL OLIGOMERIC SILSESQUIOXANE
BLOCK-COPOLYMER LITHOGRAPHY
MIKTOARM STAR COPOLYMERS
ORDER-DISORDER TRANSITION
SHAPE AMPHIPHILES
PHASE-BEHAVIOR
THIN-FILMS
CLICK CHEMISTRY
MOLECULAR ARCHITECTURE
DIBLOCK COPOLYMERS
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