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科研机构
北京大学 [421]
内容类型
期刊论文 [334]
其他 [80]
会议论文 [7]
发表日期
2017 [21]
2016 [44]
2015 [33]
2014 [44]
2013 [34]
2012 [27]
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专题:北京大学
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Changes of soil organic and inorganic carbon in relation to grassland degradation in Northern Tibet
期刊论文
ECOLOGICAL RESEARCH, 2017
Liu, Shuli
;
Tang, Yanhong
;
Zhang, Fawei
;
Du, Yangong
;
Lin, Li
;
Li, Yikang
;
Guo, Xiaowei
;
Li, Qian
;
Cao, Guangmin
收藏
  |  
浏览/下载:108/0
  |  
提交时间:2017/12/03
Soil carbon
Grassland degradation
Carbon storage
Northern Tibet
QINGHAI PROVINCE
LAND DEGRADATION
CLIMATE-CHANGE
ALPINE MEADOW
CO2 EMISSIONS
CHINA
STORAGE
SEQUESTRATION
PLATEAU
MANAGEMENT
GF-4/PMS与GF-1/WFV两种传感器地表反射率及NDVI一致性分析
期刊论文
农业工程学报, 2017
孙元亨
;
秦其明
;
任华忠
;
张添源
收藏
  |  
浏览/下载:8/0
  |  
提交时间:2017/12/03
传感器
遥感
像素
高分四号
高分一号
地表反射率
一致性
NDVI
sensors
remote sensing
pixels
GF-4
GF-1
surface reflectance
NDVI
consistency
Estimating structural parameters of agricultural crops from ground-based multi-angular digital images with a fractional model of sun and shade components
期刊论文
AGRICULTURAL AND FOREST METEOROLOGY, 2017
Mu, Xihan
;
Hu, Ronghai
;
Zeng, Yelu
;
McVicar, Tim R.
;
Ren, Huazhong
;
Song, Wanjuan
;
Wang, Yuanyuan
;
Casa, Raffaele
;
Qi, Jianbo
;
Xie, Donghui
;
Yan, Guangjian
收藏
  |  
浏览/下载:6/0
  |  
提交时间:2017/12/03
Leaf area index
Leaf angle distribution
Bidirectional gap fraction
Sun and shade leaves and soil
Field measurement
Canopy reflectance
LEAF-AREA INDEX
DIRECTIONAL BRIGHTNESS TEMPERATURE
SIZE ANALYSIS THEORY
VEGETATION COVER
HEMISPHERICAL PHOTOGRAPHY
PLANT CANOPIES
ROW CROPS
EXTINCTION COEFFICIENT
BROADLEAF CANOPIES
ANGLE DISTRIBUTION
地壳深部“重力-构造力复合压力状态”研究和大别-苏鲁超高压变质形成深度的测算
期刊论文
地学前缘, 2017
吕古贤
;
胡宝群
;
罗毅甜
;
刘瑞珣
;
王方正
;
李勃辉
;
王宗永
收藏
  |  
浏览/下载:6/0
  |  
提交时间:2017/12/03
大别超高压变质带
重力-构造力复合的静水压力模型
柯石英榴辉岩
构造附加静压力
深度构造校正测算
构造增压壳内成因
Dabie ultrahigh-pressure metamorphic belt
gravity-tectonic force composite hydrostatic pressure model
coesite-bearing eclogites
tectonic additional static pressure
structural correction calculation
tectonic pressure shell causes
塔里木盆地阿克苏地区下寒武统玉尔吐斯组两套黑色岩系的差异及成因
期刊论文
岩石学报, 2017
杨宗玉
;
罗平
;
刘波
;
刘策
;
马洁
;
陈斐然
收藏
  |  
浏览/下载:6/0
  |  
提交时间:2017/12/03
玉尔吐斯组
黑色页岩
沉积学特征
地球化学特征
控制因素
Yurtus Formation
Black shale
Sedimentology characteristics
Geochemical features
Controlling factors
RARE-EARTH-ELEMENTS
YANGTZE GORGES AREA
SOUTH CHINA
DEPOSITIONAL ENVIRONMENT
SHALLOW SEAWATER
OCEANIC ANOXIA
ORGANIC-CARBON
TRACE-ELEMENTS
GEOCHEMISTRY
SHALES
A simple temperature domain two-source model for estimating agricultural field surface energy fluxes from Landsat images
期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2017
Yao, Yunjun
;
Liang, Shunlin
;
Yu, Jian
;
Chen, Jiquan
;
Liu, Shaomin
;
Lin, Yi
;
Fisher, Joshua B.
;
McVicar, Tim R.
;
Cheng, Jie
;
Jia, Kun
;
Zhang, Xiaotong
;
Xie, Xianhong
;
Jiang, Bo
;
Sun, Liang
收藏
  |  
浏览/下载:7/0
  |  
提交时间:2017/12/03
SENSIBLE HEAT-FLUX
PRIESTLEY-TAYLOR PARAMETER
BALANCE CLOSURE PROBLEM
LEAF-AREA INDEX
EDDY-COVARIANCE
DAILY EVAPORATION
TERRESTRIAL EVAPOTRANSPIRATION
RADIOMETRIC TEMPERATURE
EXPERIMENTAL-DESIGN
METEOROLOGICAL DATA
Contextually guided very-high-resolution imagery classification with semantic segments
期刊论文
ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING, 2017
Zhao, Wenzhi
;
Du, Shihong
;
Wang, Qiao
;
Emery, William J.
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2017/12/03
VHR images
Deep learning
Semantic segmentation
CRF model
Contextual information
REMOTE-SENSING IMAGERY
SCENE CLASSIFICATION
FEATURE-EXTRACTION
MULTISCALE
INFORMATION
Nonlinear Dirac equation solitary waves under a spinor force with different components
其他
2017-01-01
Mertens, Franz G.
;
Cooper, Fred
;
Shao, Sihong
;
Quintero, Niurka R.
;
Saxena, Avadh
;
Bishop, A. R.
收藏
  |  
浏览/下载:8/0
  |  
提交时间:2017/12/03
variational approach
two-component spinors
collective coordinates
external force with damping
relativistic generalization
EXACT LOCALIZED SOLUTIONS
EXTERNAL-FIELD
GUIDE ARRAYS
MODEL
STABILITY
SOLITONS
INSTABILITY
DYNAMICS
BEHAVIOR
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
VCNet: vector-based gene co-expression network construction and its application to RNA-seq data
其他
2017-01-01
Wang, Zengmiao
;
Fang, Huaying
;
Tang, Nelson Leung-Sang
;
Deng, Minghua
收藏
  |  
浏览/下载:6/0
  |  
提交时间:2017/12/03
HYPOXIA-INDUCIBLE FACTOR
CANONICAL CORRELATION-ANALYSIS
EXPRESSION
CBP/P300
TRANSCRIPTION
VARIANCE
P300
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