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Factor analysis of selective laser melting process parameters with normalised quantities and Taguchi method 期刊论文  OAI收割
OPTICS AND LASER TECHNOLOGY, 2019, 卷号: 119, 页码: 11
作者:  
Jiang HZ(蒋华臻);  Li ZY(李正阳);  Feng T;  Wu PY;  Chen QS(陈启生)
  |  收藏  |  浏览/下载:71/0  |  提交时间:2019/10/21
Novel method for optimizing polishing tool-path in CCOS based on weighted-iterative algorithm (EI CONFERENCE) 会议论文  OAI收割
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, November 19, 2008 - November 21, 2008, Chengdu, China
作者:  
Zhang X.-J.;  Wang X.;  Wang X.;  Wang X.;  Wang X.-K.
收藏  |  浏览/下载:61/0  |  提交时间:2013/03/25
In Computer Controlled Optical Surfacing (CCOS)  polishing tool-path is the base of solving other control parameters such as dwell time. In order to improve the fabrication results of polishing off-axis aspheric  a novel method to optimize the tool-path is discussed in this paper. The optimizing method named weighted-iterative algorithm is according to the balance principle of the particle system. The power factor of each dwell point represents the requirement of dwell density. Considering the factors which influence the polishing result  the power factors cosist of three elements include constant  error distribution and dwell distance of workpiece edge. The tool-path is solved by numerical iterative method. In the end  an error data is simulated with actual parameters using the matrix-based algorithm with two different tool-paths. The one is X-Y uniform spacing model and the other one is to optimize it based on the first. The comparison shows that the results of the optimized one are much better than traditional one  especially the rms convergence rate. Theory of the algorithm is simple and exercisable  and it satisfies practical requirement as well. 2009 SPIE.  
Study of 316L stainless steel coronary stent high vacuum heat treatment (EI CONFERENCE) 会议论文  OAI收割
2009 IEEE International Conference on Mechatronics and Automation, ICMA 2009, August 9, 2009 - August 12, 2009, Changchun, China
作者:  
Wang J.-L.;  Wang J.-L.
收藏  |  浏览/下载:42/0  |  提交时间:2013/03/25
Optimization procedure for design of heliostat field layout of a 1MWe solar tower thermal power plant (EI CONFERENCE) 会议论文  OAI收割
Solid State Lighting and Solar Energy Technologies, November 12, 2007 - November 14, 2007, Beijing, China
作者:  
Zhang H.
收藏  |  浏览/下载:52/0  |  提交时间:2013/03/25
A procedure for designing and optimizing heliostat field layout of solar tower thermal power plant is developed. The ray tracing is used for the calculation of the optical efficiency of field. The mathematical theory of the calculation is derived. The parametric search algorithm  which allows variation of the field parameters within a specified range  is used for the optimization of field. The field layout is made automatically according to the no-blocking loss condition and the heliostats are located at the positions where the annual incident cosine value is higher. In this way  the blocking and cosine losses are lowered. Because the optimization of the distance between fore-and-aft two rows of heliostat is avoided  the computer time is reduced effectively. Using this procedure the heliostat field of a 1MWe solar tower power plant was designed. Four modes of layout including North-South cornfield  North-South stagger  Radial cornfield and Radial stagger were experimented and optimized respectively. The comparison of the field efficiency for the four optimized results was made. It is concluded that the North-South cornfield layout is the optimal decision for the 1MWe solar tower power plant.  
Fabrication of multilayer laminar grating with high efficiency for extreme ultraviolet (EI CONFERENCE) 会议论文  OAI收割
3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China
作者:  
Jin C.-S.;  Zhang L.-C.
收藏  |  浏览/下载:36/0  |  提交时间:2013/03/25
The main goal for investigations on multilayer laminar gratings working at the EUV region is to enhance their efficiency. In this article  second  third  we demonstrate a routine to fabricate multilayer laminar gratings with high efficiency. This routine comprises three steps: first  optimizing fabricating techniques to obtain multilayer coatings with high reflectivity  strictly controlling errors of multilayer grating parameters to ensure the coinciding of the optical performance with the expectation. Results demonstrate that this routine is feasible. The measured peak efficiency of -1 order at 12.8nm was 14.3%. Some related issues about efficiency curves such as wavelength separation and suppression of zero order are discussed.  preparing grating substrates with ideal groove profile and low roughness by holographic recording and ion beam etching process