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Spatiotemporal variations in the hydrochemical characteristics and controlling factors of streamflow and groundwater in the Wei River of China 期刊论文  OAI收割
ENVIRONMENTAL POLLUTION, 2019, 卷号: 254, 页码: 10
作者:  
Li, Zhou;  Xiao, Jun;  Evaristo, Jaivime;  Li, Zhi
  |  收藏  |  浏览/下载:27/0  |  提交时间:2020/06/05
Bootstrap loader design of aerospace payload controller based on TSC695F (EI CONFERENCE) 会议论文  OAI收割
2010 2nd International Conference on Computational Intelligence and Natural Computing, CINC 2010, September 13, 2010 - September 14, 2010, Wuhan, China
Xu W.; Piao Y.
收藏  |  浏览/下载:37/0  |  提交时间:2013/03/25
Anti-radiation TSC695F is usually used as aerospace payload controller in tasks to ensure the aerospace payload having extremely high reliability in abominable space environment. The processor bases on SP ARC V7 architecture with parity check and EDAC  so it could design out high reliable bootstrap loader to guarantee the operation system of VxWorks and application codes loaded correctly and worked stable and high effective. First  this paper put forward the system hardware composition and boot mode which apply for aerospace payload  then it makes clear the related contents of register group initialization  stack initialization  system hardware initialization in bootstrap loader of TSC695F and give out the method to establish TRAP table. That's all through comparing different type of organize mode of program image. After that  compiling of target codes have been described and the kernel code of MakeFile had been given at the same time for reference aimed at the realization of engineering. Although this paper is based on TSC695F  but it could be extended to other embedded system based on SP ARC for bootstrap loader analysis and design  for example  the TSC697 which based on SP ARC V8 with higher performance  so this paper has extremely high engineering value. 2010 IEEE.  
Stochastic video signal's automatic identification and image reproduction (EI CONFERENCE) 会议论文  OAI收割
2007 2nd IEEE Conference on Industrial Electronics and Applications, ICIEA 2007, May 23, 2007 - May 25, 2007, Harbin, China
Mingxiu L.; Guangliang H.
收藏  |  浏览/下载:19/0  |  提交时间:2013/03/25
In order to realize the automatic extraction of stochastic signal's horizontal synchronization frequency and the stable reproduction of video image  different image features of horizontal synchronization blanking signal under different deviation are analyzed  and spectrum analysis algorithm of horizontal synchronization frequency  texture feature extraction algorithm of slope image and phase feature extraction algorithm of drifting image are put forward. Based on the three algorithms  the hierarchical automatic recognition algorithm is put forward to automatically control the adjusting of the horizontal synchronization frequency and realize the reproduction. The algorithm was applied in the automatic interception system of computer video leaking information  and quick interception and stable reproduction of computer video leaking information were achieved. 2007 IEEE.  
All-solid-stated laser controller design based on digital optical feedback (EI CONFERENCE) 会议论文  OAI收割
Lasers in Material Processing and Manufacturing II, November 10, 2004 - November 12, 2004, Beijing, China
作者:  
Liu L.;  Wang J.-L.;  Wang J.-L.;  Liu L.
收藏  |  浏览/下载:28/0  |  提交时间:2013/03/25
The new design about a CW  digital all-solid-stated LD pumped Nd:YVO 4 controller is introduced. The stable output power of this digital laser controller which adopts Digital Signal Processor(TMS320C31) is approximately 20mW. The whole system is composed of constant- current source  protection circuit  pulse-width modulation circuit  Si-photo-detector and amplified circuit and Digital Signal Processor control system  etc. In terms of error deviation Based on nonlinear control curves of LD power output by Si-photo-detector  the region control can be obtained by means of the PID control algorithm in the software platform  that is  error amendment and high stability laser power output can be achieved. And the precision of temperature control can reduce from 0.2C to 0.04C. By adopted integral separated mode PID control algorithm  the LD output power instability ( %) down to 2%. By way of adopting the new digital design  the work to protect the laser diode  including the continuous adjustable output power with high accuracy and stability  is easily obtained. The internal-external modulation control of the laser power based on digital optical feedback can be accomplished with stable power output. At last  the bringing reasons of noise are analyzed and the solving methods are put forward in this paper.  
A note on the stability of Toeplitz matrix inversion formulas 期刊论文  OAI收割
APPLIED MATHEMATICS LETTERS, 2004, 卷号: 17, 期号: 8, 页码: 903-907
作者:  
Wen, YW;  Ng, MK;  Ching, WK;  Liu, H
  |  收藏  |  浏览/下载:16/0  |  提交时间:2018/09/26
A note on the stability of Toeplitz matrix inversion formulas 期刊论文  OAI收割
APPLIED MATHEMATICS LETTERS, 2004, 卷号: 17, 期号: 8, 页码: 903-907
作者:  
Wen, YW;  Ng, MK;  Ching, WK;  Liu, H
  |  收藏  |  浏览/下载:11/0  |  提交时间:2018/09/26