Journal of Applied Sciences ›› 1988, Vol. 6 ›› Issue (1): 67-73.

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THE EXTREME VALUE CONTROLLING BY DERIVATIONWITH RESPECT TO TIME AND ITS APPLICATIONTO X-RAY DIFFRACTION TOPOGRAPHY

LU ZHIPING   

  1. Shanghai Institute of Ceramics, Academia Sinica
  • Received:1985-01-21 Revised:1985-05-27 Online:1988-03-31 Published:1988-03-31

Abstract: The automatic following system of Bragg angle was set up in terms of the extreme value controlling by derivation with respect to time. The relative errors are within ±0.05. We performed some experiments in X-ray topography of sapphire and synthetic quartz and obtained quite good results.