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Tribological properties of Mos2 thin coatings under liquid lubricating (EI CONFERENCE)
会议论文
2nd International Conference on Innovation Manufacturing and Engineering Management, IMEM 2012, December 14, 2012 - December 16, 2012, Chongqing, China
Bai Y.
;
Cao P.
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浏览/下载:31/0
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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.
The Thinking about Improving the Soft Research Environment in Domestic Universities
会议论文
International Conference on Social Sciences Research (SSR), CM, 2013-01-01
作者:
Chen, Zhe
;
Geng, Xiaofu
;
Yin, Fuliang
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浏览/下载:2/0
  |  
提交时间:2019/12/11
Soft research environment
Study atmosphere
Comparison of China and the United States
Comparison of radiation temperature measurement precision between middlewave and longwave thermal-imaging systems (EI CONFERENCE)
会议论文
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
Sun Z.
;
Zhu W.
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浏览/下载:16/0
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提交时间:2013/03/25
A comparison study on temperature measurement precision between middlewave 3-5m and longwave 8-12m measuring thermal imaging systems has been conducted. The study was limited to systems working in indoor conditions and the target's temperature is in the range of 270K900K. First
the Disturb Resisting Function (DRF) of infrared systems is deduced. On the base of DRF curve
we find that the middlewave infrared system get the smaller influences under the same size disturb compared with the longwave system. A theory of the influence of target's physical characteristic and measurement conditions on the accuracy of temperature measurements has been developed. On the basis of the developed formulas an analysis of the influence of signal disturbances (because of incorrectly assumed emissivity
limited transmittance of the atmosphere
radiation reflected by the object and shift of optics radiation) on the accuracy of temperature measurement has been made. It has been found that the middlewave systems in typical temperature range offer generally better accuracy in temperature measurement than the longwave ones do. 2012 IEEE.
Comparison study on microwave absorbing properties of SiC absorbers
会议论文
作者:
Liu, Gu
;
Wang, Liuying
;
Chen, Guiming
;
Wei, Wanning
;
Ge, Chaoqun
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  |  
浏览/下载:4/0
  |  
提交时间:2019/12/10
Absorbing properties
Attenuation constants
Comparison study
Complex permittivity
Electromagnetic parameters
Frequency ranges
Imaginary parts
Microwave absorbing properties
Microwave absorption
Reflection loss
SiC
SiC whisker
COMPARISON STUDY ON THE GAP EFFECTS IN ATMOSPHERIC RADIO FREQUENCY DISCHARGES AT A CONSTANT POWER AND POWER DENSITY
会议论文
作者:
YUANTAO ZHANG
;
JIE LOU
;
QINGQUAN LI
;
QINGMIN LI
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  |  
浏览/下载:4/0
  |  
提交时间:2019/12/31
COMPARISON STUDY ON THE GAP EFFECTS IN ATMOSPHERIC RADIO FREQUENCY DISCHARGES AT A CONSTANT POWER AND POWER DENSITY
mode
A comparison study on the social impact and environmental significance of various coupled disasters in Eastern China
会议论文
4th International Conference on Bioinformatics and Biomedical Engineering, iCBBE 2010, Chengdu, China, June 18, 2010 - June 20, 2010
作者:
Li, Gang
;
Zhang, Chunhui
;
Zhang, Fan
;
Li, Zhuolun
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浏览/下载:5/0
  |  
提交时间:2017/01/18
Disasters
Bioinformatics
Climate change
Disaster prevention
Drought
Storms
Comparison study
Environmental significance
Locust plague
Natural disaster
Social impact
Ssocial crisis
Disaster emergency response model comparison of four countries
会议论文
北京, 2009-5-17
作者:
Guan Yan
;
Shi Peijun
;
Zou Ming
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  |  
浏览/下载:5/0
  |  
提交时间:2019/12/30
Emergency
response
Comparison
Case
study
CR image filter methods research based on wavelet-domain hidden markov models (EI CONFERENCE)
会议论文
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
Wang J.-L.
;
Wang Y.-P.
;
Li D.-Y.
;
Li S.-W.
;
Kui H.-L.
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浏览/下载:15/0
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提交时间:2013/03/25
In the procedure of computed radiography imaging
we should firstly get across the characters of kinds of noises and the relationship between the image signals and noises. Based on the specialties of computed radiography (CR) images and medical image processing
we have study the filtering methods for computed radiography images noises. On the base of analyzing computed radiography imaging system in detail
the author think that the major two noises are Gaussian white noise and Poisson noise. Then
the different relationship of between two kinds of noises and signal were studied completely. By considering both the characteristics of computed radiography images and the statistical features of wavelet transformed images
a multiscale image filtering algorithm
which based on two-state hidden markov model (HMM) and mixture Gaussian statistical model
has been used to decrease the Gaussian white noise in computed images. By using EM (Expectation Maximization) algorithm to estimate noise coefficients in each scale and obtain power spectrum matrix
then this carried through the syncretized two Filter that are IIR(infinite impulse response) Wiener Filter and HMM
according to scale size
and achieve the experiments as well as the comparison with other denoising methods were presented at last.
The Simulation measurement experiment and calibration for Solar Total Irradiance Monitor on board (EI CONFERENCE)
会议论文
ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China
Yupeng W.
;
Wei F.
;
Bingxi Y.
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浏览/下载:29/0
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提交时间:2013/03/25
STIM (Solar Total Irradiance Monitor) can be used on sun-synchronous polar orbit weather satellites to measure the total solar irradiance. It contains three independent and identical wide view absolute radiometers. They are mounted on the satellite in an angle which ensure the sun scan over the field of view of the absolute radiometers. This measurement method doesn't need the instrument tracking the sun but the sun scan over the field of view of the absolute radiometers in each orbit cycle. The paper presents the measurement method of simulation for solar irradiance measurement and calibration by mounting the instrument on a two-axis rotation table. By controlling the rotation angle velocity of the instrument in the meridian direction being the same as that of the weather satellite's on orbit
we can measure the solar irradiance when the sun scan over the field of view of the absolute radiometers to simulate the onboard state. And we have operated the measurement with the prototype of STIM. The SIAR-1 is traceable to WRR and serves as a transfer standard. So simultaneous comparison measurements between SIAR-1 and each of the three wide view absolute radiometers are measured to provide calibration corrections to the instrument. And we have a further study at the influence of stray light to the measurement results. This paper presents the method of simulation experiment and calibration for solar irradiance measurement with Solar Total Irradiance Monitor on board.
The logistics cost of two distribution patterns: A case study
会议论文
IEEE International Conference on Service Operations and Logistics and Informatics, Shanghai, PEOPLES R CHINA, JUN 21-23, 2006
作者:
Li, Yanhui*
;
Tang, Hanyu
;
Ma, Shihua
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浏览/下载:1/0
  |  
提交时间:2019/12/23
case study
comparison
distribution pattern
logistics cost
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