中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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Numerical Analysis of Flow Instability in the Water Wall of a Supercritical CFB Boiler with Annular Furnace 期刊论文  OAI收割
2016
作者:  
Xie, B. B., Yang, D., Xie, H. Y., Nie, X. and Liu, W. Y.
收藏  |  浏览/下载:33/0  |  提交时间:2017/05/27
MAGNETOROTATIONAL INSTABILITY IN A COLLISIONAL WEAKLY IONIZED PLASMA 期刊论文  OAI收割
ASTROPHYSICAL JOURNAL, 2012, 卷号: 754, 期号: 2
Ren, HJ; Cao, JT; Wu, ZW
收藏  |  浏览/下载:49/0  |  提交时间:2013/09/18
Onset of oscillatory double-diffusive buoyancy instability in an inclined rectangular cavity 期刊论文  OAI收割
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2012, 卷号: 55, 期号: 13-14, 页码: 3633-3640
Chen, ZW; Li, YS; Zhan, JM
收藏  |  浏览/下载:23/0  |  提交时间:2013/08/28
General criteria of material instabilities 会议论文  OAI收割
23rd International Congress of Theoretical and Applied Mechanics, 中国北京/Beijing, China, 2012-08-19
作者:  
Ma W(马维)
收藏  |  浏览/下载:25/0  |  提交时间:2014/04/02
Magnetorotational instability in a collisionless plasma with heat flux vector and an isotropic plasma with self-gravitational effect 期刊论文  OAI收割
PHYSICS OF PLASMAS, 2011, 卷号: 18, 期号: 9
Ren, HJ; Cao, JT; Wu, ZW; Chu, PK
收藏  |  浏览/下载:25/0  |  提交时间:2013/09/18
Key techniques of laser direct writing of fine lines on the spherical surface (EI CONFERENCE) 会议论文  OAI收割
ICO20: Optical Design and Fabrication, August 21, 2005 - August 26, 2005, Changchun, China
Liang F.; Hu J.
收藏  |  浏览/下载:21/0  |  提交时间:2013/03/25
The main principles of laser direct writing (LDW) system for lines on the spherical surface (SS) are discussed. It is pointed out that line profile is determined by the exposure dose distribution  which lies on the light intensity distribution of focus plane and the scanning speed. To improve the quality of line profile on the SS  several key techniques as follows are introduced. Firstly  the unique system configuration  four axes mutually intersecting at the center of the SS  is adopted  which ensures the shape of the focus be maintained circular during the writing period. Secondly  an automatic focus system (AFS) with the function of automatic focus in a certain range is introduced. Thirdly  to guarantee the linear velocity to accord with the exposure character of the photoresist all the time  an efficient arithmetic that controls motors run at appropriate angular velocity in different latitude is developed. Finally  to achieve a stable and well-behaved system so as to compensate the velocity instability resulting from unavoidable errors of mechanical and electronics factor  a powerful programmable multi-axis controller (PMAC) is utilized as the kernel element of the servocontrol system  and the curves of step response and parabolic response achieved by feedforward and PID loop tuning indicate that the location precision and velocity stability have reached a high level. The experimental results of LDW of lines on the SS work piece with a diameter 30 mm and a radius equal to 100 mm are given. The section analysis of the lines on the photoresist by the atomic force microscope (AFM) after exposure and development is performed. The results show that line width is about 3.0 m  and the steep sides of the lines are parallel to each other.  
Evaporative and convective instability in the two-layer Marangoni-Bënard system of vapor-liquid 会议论文  OAI收割
AIAA 57th International Astronautical Congress, IAC 2006, Valencia, Spain, October 2, 2006 - October 6, 2006
作者:  
Liu QS(刘秋生);  Liu R(刘荣);  Zhu ZQ(朱志强);  Yan JP
收藏  |  浏览/下载:21/0  |  提交时间:2017/06/01