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浏览/检索结果: 共10条，第1-10条 帮助

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70多年来纸坊沟小流域土壤侵蚀演变过程 期刊论文  OAI收割
中国水土保持科学, 2012, 卷号: 10, 期号: 03, 页码: 1-8
庞国伟; 谢红霞; 李锐; 杨勤科
收藏  |  浏览/下载：38/0  |  提交时间：2014/06/24
Optimization and design of the bottom support of the primary mirror chamber in the opto-electronic device (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Transportation, Mechanical, and Electrical Engineering, TMEE 2011, December 16, 2011 - December 18, 2011, Changchun, China
作者:  Zhang G.;  Zhang G.;  Zhang G.
收藏  |  浏览/下载：14/0  |  提交时间：2013/03/25
In the large-diameter opto-electronic device tracking equipment  by full analyzing the support structure of the primary mirror  the primary mirror usually uses the combination of the bottom support and the lateral support. Because both the bottom support and the lateral support are installed on the primary mirror chamber's base plate  after changing the welded structure of the primary mirror chamber structure to the cast structure and improving the stiffness of the primary mirror base plate  the stiffness of the base plate will show in the amount of sloshing of the primary mirror relative to the primary mirror chamber and therefore influences the tracking accuracy of the opto-electronic device. During the assembling and adjusting of the primary mirror in the actual process of working on the project  the amount of sloshing of the primary mirror is reduced significantly. The results show that in working on the primary mirror support  as is found that the amount of sloshing of the primary mirror relative to the primary mirror chamber is comparatively large  the forms and structure stiffness of bottom support and lateral support should be considered  together with that the stiffness of the primary mirror chamber acting as the basis is playing the crucial role. 2011 IEEE.  
Application of Moldflow in gas-assisted injection molding (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Mechatronics and Materials Processing, ICMMP 2011, November 18, 2011 - November 20, 2011, Guangzhou, China
Zi K. M.; Chen L. H.
收藏  |  浏览/下载：28/0  |  提交时间：2013/03/25
Gas-assisted injection molding(GAIM)is a new kind of plastic processing technique. It is one of the most important developments in the injection molding industry. GAIM has many advantages such as lower injection pressure  lower warpage  better surface quality  lower material consumption  and shorten molding cycle time  etc. MPI/Gas module of Moldflow software can be used to simulate the GAIM process to optimize the whole molding process. In this study  the FM new truck interior ceiling handle was analyzed in GAIM process based on the MPI/Gas module. The simulation results showed the gas penetrating time  the contours of plastic layers thickness fraction of the parts and the gas volume fraction changing with time. The results can help technicians to determine the optimum process of the melt injection and the gas injection to ensure the final quality of the parts. 2011 Trans Tech Publications.  
Research of real-time control and calibration on laser energy simulator for optoelectronic confrontation HWIL system (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Electronics, Communications and Control, ICECC 2011, September 9, 2011 - September 11, 2011, Ningbo, China
作者:  Wang J.-J.
收藏  |  浏览/下载：20/0  |  提交时间：2013/03/25
Earth elevation map production and high resolution sensing camera imaging analysis (EI CONFERENCE) 会议论文  OAI收割
Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China
作者:  Dai L.
收藏  |  浏览/下载：145/0  |  提交时间：2013/03/25
The Earth's digital elevation which impacts space camera imaging has prepared and imaging has analysed. Based on matching error that TDI CCD integral series request of the speed of image motion  statistical experimental methods-Monte Carlo method is used to calculate the distribution histogram of Earth's elevation in image motion compensated model which includes satellite attitude changes  orbital angular rate changes  latitude  longitude and the orbital inclination changes. And then  elevation information of the earth's surface from SRTM is read. Earth elevation map which produced for aerospace electronic cameras is compressed and spliced. It can get elevation data from flash according to the shooting point of latitude and longitude. If elevation data between two data  the ways of searching data uses linear interpolation. Linear interpolation can better meet the rugged mountains and hills changing requests. At last  the deviant framework and camera controller are used to test the character of deviant angle errors  TDI CCD camera simulation system with the material point corresponding to imaging point model is used to analyze the imaging's MTF and mutual correlation similarity measure  simulation system use adding cumulation which TDI CCD imaging exceeded the corresponding pixel horizontal and vertical offset to simulate camera imaging when stability of satellite attitude changes. This process is practicality. It can effectively control the camera memory space  and meet a very good precision TDI CCD camera in the request matches the speed of image motion and imaging. 2010 SPIE.  
tree-based service discovery in mobile ad hoc networks 会议论文  OAI收割
2010 IEEE Asia-Pacific Services Computing Conference, APSCC 2010, Hangzhou, 40883
Liao Mingxue; He Jing; Zhu Rongfu; Wang Xianqing; He Xiaoxin
  |  收藏  |  浏览/下载：25/0  |  提交时间：2011/03/31
A sensitive solid-phase time-resolved fluorescence immunoassay apparatus (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China
作者:  Song K.-F.;  Li J.-L.;  Zhang W.-L.;  Wang Y.-L.
收藏  |  浏览/下载：37/0  |  提交时间：2013/03/25
In the device  a He-Ne laser of flash frequency 1-20 Hz was adopted as exciting light source  and three key technical problems have been solved successfully in order to enhance the detecting sensitivity and measuring stability of the device for time-resolved fluorimmunoassays(TRFIA) [1]. The first one is to design optimum exciting optical system  so that the exciting light beam excite the sample most effectively. The second one is to have a project spectrum filter which can reduce the affection of the background light to the photomultiplier tube and also ensure influence of the stray light and mixed diffusion light to the sample fluorescence to the least  the sample fluorescence through the integrating sphere and come to the grating monochromator  The right wavelength will be chosed through changing the angle of incidence of the grating monochromator. The third one is to simulate the principle of sample averaging of BOXCAR averager. In the device  SCM was used as primary controller and CPLD was used as timing controller. Through the preparation process  signal-to-noise ratio(SNR) will be improved  also adjust delay time  ampling frequency and sampling number arbitrarily. By testing  the sensitivity is 10-12mol/L(substance marked by Eu3+)  examination repeat is &le2.5%  examination linearity is from 10 -8mol/L to 10-12mol/L  correlation coefficient is 99.98%(p&le0.01). The instrument is advanced for ultrasensitive detection of antigen and antibody  and solve the tumor  genetic variation  the virus protein detection. 2009 SPIE.  
A new algorithm of image segmentation for overlapping grain image (EI CONFERENCE) 会议论文  OAI收割
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
作者:  Zhang X.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25
Image segmentation is primary issue in image processing  at the same time it is principal problem in low level vision in computer vision field. It is the key technology to process image analysis  image comprehend and image depict successfully. Aim at measurement of granularity size of nonmetal grain  a new algorithm of image segmentation and parameters calculation for overlapping grain image is studied. The hypostasis of this algorithm is present some new attributes of graph sequence from discrete attribute of graph  consequently achieve that pick up the geometrical characteristics from input graph  and new graph sequence which in favor of image segmentation is recombined. The conception that image edge denoted with "twin-point" is put forward  base on geometrical characters of point  image edge is transformed into serial edge  and on recombined serial image edge  based on direction vector definition of line and some additional restricted conditions  the segmentation twin-points are searched with  thus image segmentation is accomplished. Serial image edge is transformed into twin-point pattern  to realize calculation of area and granularity size of nonmetal grain. The inkling and uncertainty on selection of structure element which base on mathematical morphology are avoided in this algorithm  and image segmentation and parameters calculation are realized without changing grain's self statistical characters.  
Vacuum annealing effects on properties of ITO films prepared by reactive low voltage ion plating technique (EI CONFERENCE) 会议论文  OAI收割
ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China
作者:  Wang X.;  Wang X.;  Wang X.;  Zheng X.;  Gao J.
收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25
With reactive low voltage ion plating technique  ITO (indium oxide doped with tin) films were deposited on glass substrates by using ITO pellet with a composition of 90 wt.% In2O3 and 10 wt.% SnO2 without extra heating. The post annealing process was done in vacuum with different annealing temperature at 100  200  300 and 400C for 2 hours  respectively. The effects of vacuum annealing on structural  optical and electrical properties of the ITO film deposited by RLVIP were studied in detail. The results showed that the crystalline of the film was improved with the higher temperature. The increase of the annealing temperature improved the infrared reflectivity from 30% to 80% over 8-14m of the infrared atmosphere window  and a simultaneous variation in the optical transmission of the visible spectral region occurred. In addition  sheet resistance of ITO films had contrary changing trend with the IR reflectance  as well.  
A nonparametric test of changing conditional variances in autoregressive time series 期刊论文  OAI收割
COMMUNICATIONS IN STATISTICS-THEORY AND METHODS, 2001, 卷号: 30, 期号: 3, 页码: 557-578
作者:  Chen, M;  Chen, G
  |  收藏  |  浏览/下载：12/0  |  提交时间：2018/07/30