BAE’s Life Test Results on Various Linear Coolers and Their Correlation with a First Order Life Estimation Method

2002 ◽  
pp. 665-671
Author(s):  
D. T. Kuo ◽  
T. D. Lody ◽  
S. W. K. Yuan
Keyword(s):  
Estimation Method ◽  
Test Results ◽  
Life Test ◽  
Life Estimation ◽  
First Order

Photocatalytic Discolouration of Solutions of Reactive Dyes in the Presence of H2O2

1995 ◽  
Vol 30 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Deng Nansheng ◽  
Tian Shizhong ◽  
Xia Mei
Keyword(s):  
Photochemical Reaction ◽  
Uv Light ◽  
Reactive Dyes ◽  
Solar Light ◽  
Rate Equations ◽  
Oh Radical ◽  
Test Results ◽  
Dye Molecules ◽  
First Order ◽  
Dye Solutions

Abstract Tests for the photocatalytic degradation of solutions of three reactive dyes, Red M-5B, Procion Blue MX-R and Procion Black H-N, in the presence of H2O2 were carried out. When the solutions of the three reactive dyes were irradiated by UV or solar light, the colour of the solutions disappeared gradually. A statistical analysis of the test results indicated a linear relation between the concentration of dyes and the time of irradiation. The discolouration reaction of the solutions was of the first order. Rate equations for the discolouration reactions of dye solutions were developed. The dark reactions or the dye solutions containing H2O2 were very slow, illustrating that the photochemical reaction played a very important role. It was demonstrated that UV light and solar light (300 to 380 nm) photolyzes the HO and that the resulting OH radical reacts with the dye molecules and destroys the chromophore.

Non-stationary local slope estimation via forward-backward space derivative calculation

Geophysics ◽  
2021 ◽  
pp. 1-91
Author(s):  
Hang Wang ◽  
Liuqing Yang ◽  
Xingye Liu ◽  
Yangkang Chen ◽  
Wei Chen
Keyword(s):  
Finite Difference ◽  
Random Noise ◽  
Estimation Method ◽  
Order Derivative ◽  
Space Domain ◽  
Local Slope ◽  
First Order ◽  
Slope Estimation ◽  
Difference Calculation ◽  
Seismic Images

The local slope estimated from seismic images has a variety of meaningful applications. Slope estimation based on the plane-wave destruction (PWD) method is one of the widely accepted techniques in the seismic community. However, the PWD method suffers from its sensitivity to noise in the seismic data. We propose an improved slope estimation method based on the PWD theory that is more robust in the presence of strong random noise. The PWD operator derived in the Z-transform domain contains a phase-shift operator in space corresponding to the calculation of the first-order derivative of the wavefield in the space domain. The first-order derivative is discretized based on a forward finite difference in the traditional PWD method, which lacks the constraint from the backward direction. We propose an improved method by discretizing the first-order space derivative based on an averaged forward-backward finite-difference calculation. The forward-backward space derivative calculation makes the space-domain first-order derivative more accurate and better anti-noise since it takes more space grids for the derivative calculation. In addition, we introduce non-stationary smoothing to regularize the slope estimation and to make it even more robust to noise. We demonstrate the performance of the new slope estimation method by several synthetic and field data examples in different applications, including 2D/3D structural filtering, structure-oriented deblending, and horizon tracking.

scholarly journals A new remaining useful life estimation method for equipment subjected to intervention of imperfect maintenance activities

2018 ◽  
Vol 31 (3) ◽  
pp. 514-528 ◽  
Author(s):  
Changhua HU ◽  
Hong PEI ◽  
Zhaoqiang WANG ◽  
Xiaosheng SI ◽  
Zhengxin ZHANG
Keyword(s):  
Estimation Method ◽  
Remaining Useful Life ◽  
Imperfect Maintenance ◽  
Life Estimation ◽  
Useful Life ◽  
Maintenance Activities

Active matrix organic light-emitting diode (AMOLED) performance and life test results

2011 ◽  
Author(s):  
David A. Fellowes ◽  
Michael V. Wood ◽  
Arthur R. Hastings, Jr. ◽  
Russell S. Draper ◽  
Amalkumar Ghosh ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Test Results ◽  
Life Test ◽  
Active Matrix ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

scholarly journals The 6,500-H Life Test Results of 30 cm Diameter Ion Thruster

2021 ◽  
Vol 13 ◽  
Author(s):  
Sun Mingming ◽  
Geng Hai ◽  
Zheng Yi
Keyword(s):  
Test Results ◽  
Life Test ◽  
Ion Thruster

scholarly journals A Life Estimation Method of the Plastic Helical Gear and Spur Gear Pairs(Machine Elements and Manufacturing)

2009 ◽  
Vol 75 (755) ◽  
pp. 2068-2074 ◽  
Author(s):  
Mikio TAKAHASHI ◽  
Hideo TAKAHASHI ◽  
Tokihiko TAKI ◽  
Takao KOIDE
Keyword(s):  
Estimation Method ◽  
Spur Gear ◽  
Helical Gear ◽  
Life Estimation ◽  
Machine Elements
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