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The paper proposes a new model to predict the backward extrusion force of Cu-0.75Cr copper alloy based on Projection Pursuit Regression (PPR). Three major technological parameters of the fault plane contraction rate, convex model awl angle and extrusion temperature are regarded as the influencing factors and the extrusion force in the backward extrusion process is regarded as the influencing object...
The evaluation of the tank firepower performance is very important for the demonstration, research, and use of armored vehicles. The Topsis method is applied in this article to comprehensively evaluate the firepower performance of tank, and this method is the effective evaluation method by using the multi-objective decision method to approach the ideal solution, which could effectively solve the difficulty...
The projection pursuit classification method is used to study the decision-making of plane's maintenance program, the optimal program is determined to improve the scientific of decision-making. Simulation examples show that the method is reasonable and effective.
We can judge the diesel active state by measuring the turbo supercharger speed, but in practical measurement, there are always many problems. In this paper, we build the regression model of relationship between turbo supercharger speed and pressure ratio, intake flow, turbine final pressure, turbine front pressure, turbine final temperature, gas compressor final pressure, gas compressor front pressure...
In this paper, Ni-Co compositional coatings were electrodeposited by brush-plating and the surface topography images were obtained with the help of scanning electron microscope. The surface topography of Ni-Co coating and the Co element in Ni-Co alloy coating were changed by changing the proportion of Co in plating solution. The fractal dimensions of the surface topography of Ni-Co coating with different...
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