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科研机构
北京大学 [242]
内容类型
期刊论文 [133]
其他 [99]
会议论文 [10]
发表日期
2017 [22]
2016 [39]
2015 [28]
2014 [19]
2013 [16]
2012 [21]
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共242条,第1-10条
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专题:北京大学
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Tree-ring-based SPEI reconstruction in central Tianshan Mountains of China since AD 1820 and links to westerly circulation
期刊论文
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2017
Jiang, Peng
;
Liu, Hongyan
;
Wu, Xiuchen
;
Wang, Hongya
收藏
  |  
浏览/下载:11/0
  |  
提交时间:2017/12/03
SPEI
tree-ring width
Tianshan Mountains
DROUGHT SEVERITY INDEX
MOISTURE VARIABILITY
NORTH-ATLANTIC
CLIMATE-CHANGE
TIME-SERIES
VEGETATION
IMPACTS
HISTORY
DATASET
SHAN
Passive Super-Low Frequency electromagnetic prospecting technique
期刊论文
FRONTIERS OF EARTH SCIENCE, 2017
Wang, Nan
;
Zhao, Shanshan
;
Hui, Jian
;
Qin, Qiming
收藏
  |  
浏览/下载:9/0
  |  
提交时间:2017/12/03
Super-Low Frequency (SLF)
three-dimensional modeling
frequency-depth transformation
geothermal exploration
coalbed methane (CBM)
electromagnetic radiation (EMR)
FINITE-DIFFERENCE APPROXIMATIONS
COALBED METHANE RESERVOIRS
MAGNETOTELLURIC DATA
RADIATION
EXPLORATION
CHALLENGES
RESOURCES
INDUCTION
INVERSION
FRACTURE
基于改进粒子群算法的压缩感知
其他
2017-01-01
陈江琦
;
马尽文
收藏
  |  
浏览/下载:6/0
  |  
提交时间:2017/12/03
信号采样
压缩感知
稀疏信号
粒子群算法
多群协作机制
signal sampling
compressive sensing
sparse signal
particle swarm optimization
multi-group collaboration learning mechanism
一种用于高场MRI的多源射频发射机
期刊论文
波谱学杂志, 2017
何刚
;
王为民
收藏
  |  
浏览/下载:7/0
  |  
提交时间:2017/12/03
高场
磁共振成像(MRI)
多源射频发射机
软件无线电
现场可编程门阵列(FPGA)
high-field
MRI
multi-channel radiofrequency transmitter
software defined radio
field programmable gate array (FPGA)
An improved multi-frequency carrier phase ambiguity resolution
其他
2017-01-01
Gu, Xiaoying
;
Zhu, Bocheng
收藏
  |  
浏览/下载:7/0
  |  
提交时间:2017/12/03
Ambiguity resolution
precise point positioning
multi-frequency carrier phase
linear combination
An iterative approach to H-/H Fault Detection Observer Design for Discrete-Time Uncertain Systems
期刊论文
ASIAN JOURNAL OF CONTROL, 2017
Huang, Di
;
Duan, Zhisheng
;
Hao, Yuqing
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2017/12/03
Fault detection
multi-objective
H- index
discrete-time systems
structured uncertainty
FINITE FREQUENCY-DOMAIN
DETECTION FILTER DESIGN
VARYING SYSTEMS
LMI APPROACH
KYP LEMMA
SPECIFICATIONS
INDEX
Design and characterization for a high-temperature dual-band radome wall structure for airborne applications
期刊论文
MATERIALS & DESIGN, 2017
Zhou, Licheng
;
Liu, Zejia
;
Tang, Liqun
;
Pei, Yongmao
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2017/12/03
Radome wall structure
High-temperature
Dual-band
Transmission measurement
Calibration
ELECTROMAGNETIC OPTIMAL-DESIGN
FREE-SPACE
DIELECTRIC-PROPERTIES
COMPLEX PERMITTIVITY
SANDWICH RADOME
MICROWAVE CHARACTERIZATION
ANTENNA
SYSTEM
LIGHTWEIGHT
FREQUENCIES
Magnetic-control multifunctional acoustic metasurface for reflected wave manipulation at deep subwavelength scale
期刊论文
SCIENTIFIC REPORTS, 2017
Chen, Xing
;
Liu, Peng
;
Hou, Zewei
;
Pei, Yongmao
收藏
  |  
浏览/下载:2/0
  |  
提交时间:2017/12/03
SOUND
PROPAGATION
Design and characterization for dual-band and multi-band A sandwich composite radome walls
期刊论文
COMPOSITES SCIENCE AND TECHNOLOGY, 2017
Zhou, Licheng
;
Wang, Peiyu
;
Pei, Yongmao
;
Zeng, Anmin
;
Tang, Liqun
;
Liu, Zejia
;
Liu, Yiping
;
Jiang, Zhenyu
;
Fang, Daining
收藏
  |  
浏览/下载:6/0
  |  
提交时间:2017/12/03
Radome
Dual-band
Multi-band
Sandwich structure
Transmission
FREQUENCY-SELECTIVE SURFACES
LOW-OBSERVABLE RADOMES
AIRBORNE APPLICATIONS
TRANSMISSION CHARACTERISTICS
MICROWAVE-ABSORPTION
NANOCOMPOSITES
PERFORMANCE
SYSTEM
SPACE
LAYER
Very large scale motions and PM10 concentration in a high-Re boundary layer
期刊论文
PHYSICS OF FLUIDS, 2017
Wang, Guohua
;
Zheng, Xiaojing
;
Tao, Jianjun
收藏
  |  
浏览/下载:8/0
  |  
提交时间:2017/12/03
SALTATION
SIMULATION
REGION
WINDS
AIR
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