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科研机构
北京大学 [628]
内容类型
期刊论文 [468]
其他 [144]
会议论文 [16]
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2017 [45]
2016 [59]
2015 [54]
2014 [58]
2013 [39]
2012 [23]
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专题:北京大学
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The origin of tetraradial symmetry in cnidarians
期刊论文
LETHAIA, 2017
Dzik, Jerzy
;
Balinski, Andrzej
;
Sun, Yuanlin
收藏
  |  
浏览/下载:5/0
  |  
提交时间:2017/12/03
China
evolution
Medusozoa
Ordovician
polyps
SOUTHERN SHAANXI PROVINCE
SMALL SHELLY FOSSILS
SPHENOTHALLUS-HALL
PHYLUM-CNIDARIA
STEPHANOSCYPHUS SCYPHOZOA
GAOJIASHAN LAGERSTATTE
PHYLOGENETIC POSITION
BILATERAL SYMMETRY
LOWER ORDOVICIAN
N SPEC
Garnets in the majorite-pyrope system: symmetry, lattice microstrain, and order-disorder of cations
期刊论文
PHYSICS AND CHEMISTRY OF MINERALS, 2017
Liu, Zhaodong
;
Du, Wei
;
Shinmei, Toru
;
Greaux, Steeve
;
Zhou, Chunyin
;
Arimoto, Takeshi
;
Kunimoto, Takehiro
;
Irifune, Tetsuo
收藏
  |  
浏览/下载:7/0
  |  
提交时间:2017/12/03
Garnet
Phase transition
Microstrain
Cation disorder
Cation substitution
SOLID-SOLUTIONS
RAMAN-SPECTROSCOPY
SILICATE GARNETS
PHASE-TRANSITION
GPA
MG3AL2SI3O12
ELASTICITY
JOIN
ZONE
Cycle symmetry, limit theorems, and fluctuation theorems for diffusion processes on the circle
其他
2017-01-01
Ge, Hao
;
Jia, Chen
;
Jiang, Da-Quan
收藏
  |  
浏览/下载:6/0
  |  
提交时间:2017/12/03
Excursion theory
Bessel process
Haldane equality
Cycle flux
Nonequilibrium
FREE-ENERGY DIFFERENCES
STOCHASTIC DYNAMICS
ENTROPY PRODUCTION
EQUALITY
MARKOV
AN ALGEBRAIC APPROACH TO NONORTHOGONAL GENERAL JOINT BLOCK DIAGONALIZATION
其他
2017-01-01
Cai, Yunfeng
;
Liu, Chengyu
收藏
  |  
浏览/下载:112/0
  |  
提交时间:2017/12/03
joint block diagonalization
tensor decomposition
independent component analysis
CANONICAL POLYADIC DECOMPOSITION
HIGHER-ORDER TENSOR
EXPLOITING GROUP SYMMETRY
MATRIX ASTERISK-ALGEBRAS
3RD-ORDER TENSORS
UNIQUENESS
SEPARATION
IDENTIFICATION
ALGORITHMS
SQUARES
Transition of Defect Patterns from 2D to 3D in Liquid Crystals
其他
2017-01-01
Qu, Yang
;
Wei, Ying
;
Zhang, Pingwen
收藏
  |  
浏览/下载:2/0
  |  
提交时间:2017/12/03
Transition of defects
liquid crystal
Landau-de Gennes model
spectral method
DE-GENNES THEORY
NEMATIC EMULSIONS
ORDER
Embedding compact surfaces into the 3-dimensional Euclidean space with maximum symmetry
其他
2017-01-01
Wang, Chao
;
Wang, ShiCheng
;
Zhang, YiMu
;
Zimmermann, Bruno
收藏
  |  
浏览/下载:6/0
  |  
提交时间:2017/12/03
finite group action
extendable action
symmetry of surface
maximum order
The maximally symmetric surfaces in the 3-torus
其他
2017-01-01
Bai, Sheng
;
Robins, Vanessa
;
Wang, Chao
;
Wang, Shicheng
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2017/12/03
Maximal surface symmetry
Triply periodic minimal surfaces
Knotted surfaces in the 3-torus
Unique Normal Form for a Class of Three-Dimensional Nilpotent Vector Fields
其他
2017-01-01
Li, Jing
;
Kou, Liying
;
Wang, Duo
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  |  
浏览/下载:4/0
  |  
提交时间:2017/12/03
Three-dimensional nilpotent vector field
unique normal form
first integral
linear grading function
multiple Lie brackets
SINGULARITIES
REDUCTION
PART
Stabilized Mixed Finite Element Methods for Linear Elasticity on Simplicial Grids in R-n
其他
2017-01-01
Chen, Long
;
Hu, Jun
;
Huang, Xuehai
收藏
  |  
浏览/下载:8/0
  |  
提交时间:2017/12/03
Linear Elasticity
Stabilized Mixed Finite Element Method
Error Analysis
Simplicial Grid
Inf-Sup Condition
WEAKLY IMPOSED SYMMETRY
PLANE ELASTICITY
STRESS SYMMETRY
FAMILY
TENSORS
Stability of icosahedral quasicrystals in a simple model with two-length scales
其他
2017-01-01
Jiang, Kai
;
Zhang, Pingwen
;
Shi, An-Chang
收藏
  |  
浏览/下载:7/0
  |  
提交时间:2017/12/03
icosahedral quasicrystals
two length scales with golden ratio
projection method
MEAN-FIELD THEORY
FARADAY WAVES
ORDER
SYMMETRY
PATTERNS
SPHERES
SYSTEM
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