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长春光学精密机械与物... [4]
南海海洋研究所 [1]
西北高原生物研究所 [1]
合肥物质科学研究院 [1]
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Yarn ball-like MoS2 nanospheres coated by nitrogen-doped carbon for enhanced lithium and sodium storage performance
期刊论文
OAI收割
JOURNAL OF POWER SOURCES, 2020, 卷号: 465
作者:
Bai, Jin
;
Zhao, Bangchuan
;
Wang, Xin
;
Ma, Hongyang
;
Li, Kunzhen
  |  
收藏
  |  
浏览/下载:30/0
  |  
提交时间:2020/11/26
MoS2-PVP@NC composite
Yarn ball-like nanosphere
N-doped carbon layer
Anode material
Lithium-ion or sodium ion batteries
Is phosphorus a limiting factor to regulate the growth of phytoplankton in Daya Bay, northern South China Sea: a mesocosm experiment
期刊论文
OAI收割
ECOTOXICOLOGY, 2019, 卷号: 28, 期号: 5, 页码: 559, 568
作者:
Liu, Jihua
;
Su, Xinying
;
Xu, Ge
;
Tan, Meiting
;
Song, Xingyu
  |  
收藏
  |  
浏览/下载:160/0
  |  
提交时间:2019/09/09
Mesocosm
N- or
and P-enrichments
Growth
Photosynthetic performance
Phytoplankton assemblages
Daya Bay
Tribological properties of Mos2 thin coatings under liquid lubricating (EI CONFERENCE)
会议论文
OAI收割
2nd International Conference on Innovation Manufacturing and Engineering Management, IMEM 2012, December 14, 2012 - December 16, 2012, Chongqing, China
Bai Y.
;
Cao P.
收藏
  |  
浏览/下载:33/0
  |  
提交时间:2013/03/25
The objective of this study is to investigate the effect of solid and liquid lubrication on friction and wear performance of selected solid lubricating coatings
comparative experiments have been carried out on magnetron sputtered MoS2 coatings against Si3N4 ball using a ball-on-disk tribo-tester under the conditions of room temperature and different lubrication. Surface morphology of coatings were investigated by atom force microscope (AFM)
and friction coefficient (COF) and wear rate of solid films were also be analyzed. It was shown that the friction is greatly reduced when the solid film is lubricated with oil and grease simultaneously in comparison with single-lubricant lubrication at the start-up or under boundary lubrication conditions. Liquid lubrication causes a dramatic decrease of the wear-ability of the MoS2 coatings. The effect of oil lubrication to the deterioration of wear resistance of MoS2 film was even worse than lubrication grease. (2013) Trans Tech Publications
Switzerland.
A hybrid median filter for enhancing dim small point targets and its fast implementation (EI CONFERENCE)
会议论文
OAI收割
2011 International Conference on Multimedia and Signal Processing, CMSP 2011, May 14, 2011 - May 15, 2011, Guilin, Guangxi, China
Yang Q.
收藏
  |  
浏览/下载:22/0
  |  
提交时间:2013/03/25
Weak stars and middle altitude orbit satellites or high altitude orbit satellites are presented as dim point targets in images of astronomical observation. They have low intensity and occupy few pixels in image. In most situations
the background of sky is always ununiform and there exists pulse noises. Thus results in targets submerging in background noises and low signal noise ratio (SNR). Median filter is an effective method for removing pulse noise. But it can blur image after modifying gray of non-noise pixels when image has low SNR. A hybrid median filter algorithm is proposed to process low SNR dim point targets image. The newly proposed method can suppress the pulse noises
also can increase target $SNR$ and does not add extra fake targets. The time complexity of median filter is O(N2)(N is the widow size) and is difficult to implement in hardware. For quasi real time application
a fast implementation of our hybrid median filter is proposed to reduce the time complexity to O(N). Experimental results show that the newly proposed algorithm is superior to ordinary median filter and fast median filter by comparing visual effect and performance. 2011 IEEE.
Image compression algorithm of high-speed SPIHT for aerial applications (EI CONFERENCE)
会议论文
OAI收割
2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011, May 27, 2011 - May 29, 2011, Xi'an, China
作者:
Zhang K.
;
Zhang K.
;
Zhang K.
;
Zhang K.
收藏
  |  
浏览/下载:39/0
  |  
提交时间:2013/03/25
SPIHT and NLS (Not List SPIHT) are efficient compression algorithms
but the algorithms application is limited by the shortcomings of the poor error resistance and slow compression speed in the aviation and other areas requiring high-speed compression. In this paper
the error resilience and the compression speed are improved. The remote sensing images are decomposed by Le Gall5/3 wavelet
and wavelet coefficients are indexed
scanned and allocated by the means of family blocks. The bit-plane importance is predicted by bitwise OR
so the N bit-planes can be encoded at the same time. Compared with the SPIHT algorithm
this modified algorithm is easy implemented by hardware
and the compression speed is improved. The PSNR of reconstructed images encoded by high-speed SPIHT is slightly lower than SPIHT at rate 1bpp
but the speed is 4.5-6 times faster than SPIHT encoding process. The algorithm meets the high speed and reliability requirements of aerial applications. 2011 IEEE.
Effects of temperature, glucose and inorganic nitrogen inputs on carbon mineralization in a Tibetan alpine meadow soil
期刊论文
OAI收割
european journal of soil biology, 2010, 卷号: 46, 期号: 6, 页码: 375-380
作者:
Song, Minghua
;
Jiang, Jing
;
Cao, Guangmin
;
Xu, Xingliang
收藏
  |  
浏览/下载:52/0
  |  
提交时间:2011/12/13
SOC mineralization
Q(10)
C or N amendment
Soil heterotrophic respiration
Tibetan Plateau
The synthesis and field emission property of carbon nanotubes on carbon fibers substrate (EI CONFERENCE)
会议论文
OAI收割
Technical Digest of the 20th International Vacuum Nanoelectronics Conference, IVNC 07, July 8, 2008 - July 12, 2008, Chicago, IL, United states
Leyong Z.
;
Weibiao W.
;
Jingqiu L.
;
Yuxue X.
;
Da L.
;
Song C.
;
Haifeng Z.
收藏
  |  
浏览/下载:33/0
  |  
提交时间:2013/03/25
Using ferrocene as catalyst precursor
C2H2 as carbon source
carbon nanotubes (CNTs) with uniform density were synthesized on carbon fibers substrate by floating catalyst method. The morphology and microstructure were characterized by field emission scanning electron microscope (FESEM) and high-resolution transmission electron microscopy (HRTEM). The observation showed that the length of CNTs is about 2 m
the average space between adjacent CNTs is about 300 nm and the diameter of CNT is about 45 nm. The less dense "short and stubby" aligned CNTs films should have good electron field emission characteristics. The results of field emission showed that the emission current of CNTs/carbon fibers was 5 A at the field of 2.5 V/m
and the emission current can be 280 A with a field of 7 V/m (the specimen area is 0.25 cm2 and the distance between cathode and anode is 200 m). The calculation based on the F-N plot indicated that the field enhancement factor of CNTs tip is 499122. Using the conductivity and chemical stability of carbon fibers and the uniform and sparse density distribution of CNTs on carbon fibers substrate
the tip predominance of carbon nanotubes can be exerted
and simultaneously the effect of screening effects between adjacent carbon nanotubes on the field emission performance can also be effectively decreased. The CNTs synthesized on carbon fibers substrate has many predominances for the fabrication of cold cathode devices. For example
using the removability of carbon fibers
the cathode of CNTs/carbon fibers can be arbitrarily moved
enlaced or combined to form different patterns
and the cathode of CNTs/carbon fibers can be also fabricated in large size. Therefore
CNTs/carbon fibers may have potential application in field emission displays.