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北京大学 [1]
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Pre-flight thermal performance test of a 35 K cryogenic integrated system [Test de performance thermique avant vol d'un système cryogénique intégré à 35K]
期刊论文
International Journal of Refrigeration, 2019, 卷号: 98, 页码: 372-380
作者:
He, J.
;
Guo, Y.
;
Miao, J.
;
Ding, T.
;
Zhang, H.
收藏
  |  
浏览/下载:6/0
  |  
提交时间:2019/12/30
Cooling
Cryogenic equipment
Heat pipes
Critical heat transfer
Cryogenic loop heat pipes
Integrated systems
Pulse tube cryocoolers
Steady-state operating
Supercritical startups
Terrestrial environments
Thermal Performance
Integrated control
Effect of urban tourist satisfaction on urban macroeconomics in China: A spatial panel econometric analysis with a spatial Durbin model.
期刊论文
PLoS ONE, 2018, 卷号: Vol.13 No.10, 页码: 1-24
作者:
Zhou, Min
;
Liu, Xiaoqun
;
Tang, Guoan
收藏
  |  
浏览/下载:12/0
  |  
提交时间:2019/12/26
Biology and life sciences
Computer and information sciences
Earth sciences
Ecology
Ecology and environmental sciences
Econometrics
Economic analysis
Economics
Geography
Geoinformatics
Housing
Human geography
Macroeconomics
Mathematical economics
Mathematics
Microeconomics
Physical sciences
Research Article
Social sciences
Spatial autocorrelation
Statistical models
Statistics
Terrestrial environments
Urban ecology
Urban economics
Urban environments
Performance of the least squares filter for passive radar interference cancellation applications
期刊论文
IET RADAR SONAR AND NAVIGATION, 2017, 卷号: 11, 期号: 8
作者:
Tang, Hui
;
Wan, Xianrong
;
Yi, Jianxin
;
Liu, Yuqi
;
Ke, Hengyu
收藏
  |  
浏览/下载:10/0
  |  
提交时间:2019/12/05
passive radar
radar signal processing
signal reconstruction
signal denoising
least squares filter
passive radar interference cancellation applications
LS filter
surveillance signal
subspace orthogonal
interference subspace
ideal reference signal reconstruction
passive sensing environments
nonnegligible multipath
nonnegligible noise
modulation error rate
direct-path signal noise ratio
SNR
closed-form expression
cancellation loss ratio
CLR
modified-MER scheme
noise residual
cancellation performance improvement
digital terrestrial multimedia broadcasting waveform
practical data processing
passive radar sensing
An Empirical Random-Cluster Model for Subway Channels Based on Passive Measurements in UMTS
期刊论文
IEEE TRANSACTIONS ON COMMUNICATIONS, 2016
Cai, Xuesong
;
Yin, Xuefeng
;
Cheng, Xiang
;
Perez Yuste, Antonio
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  |  
浏览/下载:5/0
  |  
提交时间:2017/12/04
Subway propagation environment
passive channel sounding
multi-link channel
time-evolving cluster
delay spread
doppler frequency spread
K-factor
path loss
universal mobile terrestrial system
TUNNEL ENVIRONMENTS
WAVE-PROPAGATION
LOSS PREDICTION
PATH LOSS
RADIO
MHZ
Drought adaptation of a terrestrial macroscopic cyanobacterium, Nostoc flagelliforme, in arid areas: A review
期刊论文
AFRICAN JOURNAL OF MICROBIOLOGY RESEARCH, 2012, 卷号: 6, 期号: 28, 页码: 5728-5735
作者:
Gao, Xiang*
;
Ai, Yufeng
;
Qiu, Baosheng(邱保胜)
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  |  
浏览/下载:3/0
  |  
提交时间:2019/12/23
Nostoc flagelliforme is a terrestrial macroscopic cyanobacterium with a hair-like appearance that is distributed in arid and semi-arid areas. It exhibits remarkable tolerance to extremely acute or long-term dehydration stress. However
it cannot withstand prolonged hydration or water saturation. It appears that too little water limits its growth while too much water becomes a burden. This seemingly contradictory situation is particularly pronounced in N. flagelliforme
reflecting its distinctiveness among Nosotcspecies with respect to the ways they adapt to dry environments. In this review
we call attention to potentially important drought-adaptation mechanisms in this species
including mechanisms related to its morphology
structure
ecophysiology and genetic background
summarizing the available studies relevant to this topic. This species may become a good model for investigating the diverse genetic mechanisms of Nostoc adaptation to dry environments.
Chemical characterization of naturally weathered oil residues in the sediment from Yellow River Delta, China
期刊论文
MARINE POLLUTION BULLETIN, 2011, 卷号: 62, 期号: 11, 页码: 2469-2475
作者:
Wang, Chuanyuan
;
Du, Jianguo
;
Gao, Xuelu
;
Duan, Yi
;
Sheng, Yanqing
收藏
  |  
浏览/下载:64/0
  |  
提交时间:2012/03/06
Oil Spills
Yellow River Delta
Weathering
Terrestrial Environments
Source Identification
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