Differential Evolution and Heat Radiation Intensity Optimization

2014 ◽  
Author(s):  
Jaroslav Mlynek ◽  
Radek Srb
Keyword(s):  
Differential Evolution ◽  
Radiation Intensity ◽  
Heat Radiation

Analysis of Combustion Characterization of Computer Monitor and Paper in Conic Calorimeter Test

2011 ◽  
Vol 282-283 ◽  
pp. 169-172
Author(s):  
Jia Lei Tan ◽  
Yu Shu Xie ◽  
Xiao Feng Zhang ◽  
Tong Wang
Keyword(s):  
Mass Loss ◽  
Production Rate ◽  
Release Rate ◽  
Radiation Intensity ◽  
Cone Calorimeter ◽  
Loss Rate ◽  
Mass Loss Rate ◽  
Growth Index ◽  
Heat Radiation ◽  
Fire Growth

Small-scale burning experimental study of computer monitors and paper was done based on cone calorimeter. The small and middle scale fires were simulated by changing the heat radiation intensity of cone calorimeter. The heat release rate, mass loss rate and production rate of CO was measured in experiment. The data of mass loss rate and CO production rate is fitted, and the formula of its change with time is obtained. The computer monitor has slow pyrolysis speed on the 35 kW/m2, and the carbon layer on surface gradually thickened. So the heat will accumulate, and then the pyrolysis speed increases. The heat release rate reaches to the second peak. The fire growth index of monitor increases as the heat radiation intensity. But the fire growth index of paper has the opposition trend. The CO production rate of computer monitor is larger than paper’s. The experiment results can reflect the combustion characteristics of computer monitor on real fires.

Optimum Design of Piston Stroke and Cylinder Diameter for HPD Diesel Engine

2011 ◽  
Vol 347-353 ◽  
pp. 522-524
Author(s):  
Guo Dong You ◽  
Tie Xiong Su ◽  
Chun Long Xu ◽  
Lu Xu ◽  
Jun Feng Xu
Keyword(s):  
Mathematical Model ◽  
Diesel Engine ◽  
Differential Evolution ◽  
Differential Evolution Algorithm ◽  
Heat Radiation ◽  
Cylinder Diameter ◽  
Evolution Algorithm ◽  
Improved Differential Evolution Algorithm ◽  
Piston Stroke ◽  
Radiation Area

Based on the load and heat radiation area are directly influenced by the ratio of piston stroke to cylinder diameter (S/D).An optimized mathematical model is established, with the minimal heat radiation area as the object function and the S/D value as the variable. The optimum results are calculated by using the an Improved differential evolution algorithm method based on 1Stopt.The result shows that this method is of better convergence, high calculation efficiency and consistent with MTU890.

LZW differential evolution for binary encoding

2012 ◽  
Author(s):  
Orawan Watchanupaporn ◽  
Worasait Suwannik
Keyword(s):  
Differential Evolution ◽  
Binary Encoding

Radiation of Charge Moving Between Two Planar Periodic Wire Structures

2020 ◽  
Vol 23 (1) ◽  
pp. 66-71
Author(s):  
E. A. Gurnevich ◽  
I. V. Moroz
Keyword(s):  
Angular Distribution ◽  
Charged Particle ◽  
Research And Development ◽  
High Power ◽  
Free Electron ◽  
Radiation Intensity ◽  
Free Electron Lasers ◽  
Radiation Sources ◽  
Power Radiation ◽  
High Power Radiation

The Smith-Purcell radiation of a charged particle moving in a periodic structure is analysed theoretically. The considered structure consists of two planar diffraction gratings with different periods which are formed by parallel conducting wires. The analytical expression for the spectral-angular distribution of radiation is obtained. It is shown that the angular distribution of radiation can be made narrower by using two gratings instead of one, and radiation intensity can be manipulated by parallel relative shift of gratings. The obtained results are of great importance for the research and development of high power radiation sources based on volume free-electron lasers.

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