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Structural parameters and material behaviors of an in-service structure are changed due to various external factors influence. Its structural strength is hard to be clearly expressed by mathematical formula. Based on the Grey system and the new information principle, taking the mean relative error as objective function and taking the modified nth component of each variable as initial value of response...
A general method for Grey Fuzzy Robust Optimization Design of High-dimension Multi-objective was presented based on sensitivity of designed variables and based on sensibility analysis to produce fuzzy objective functions, two models for Grey Fuzzy Robust Optimization Design of High-dimension Multi-objective were established. The fuzzy multi-objective optimization design was transformed into the general...
The optimum model of the truck's gearbox was built up. On the basis of GuoTao algorithm, an elite multi-parent crossover evolutionary optimization algorithm by introducing the elite-preservation strategy, constructing dynamic penalty function and enhancing the selection pressure of parents in the process of crossover was presented. Based on Matlab software, the program DEMPCOA with hybrid discrete...
The non-equal-interval direct optimum Verhulst GM(1,1) model was built which extended equal interval to non-equal-interval and suited for general data modeling and estimating parameters of direct Verhulst GM(1,1) by optimizing the background value. The new model need not pre-process the primitive data, accumulated generating operation (AGO) and inverse accumulated generating operation (IAGO). It was...
The optimal design of planetary gears is a problem with high dimensional multi-objective and with complicated calculations & constraints et al. A general method for high dimensional multi-objective optimal design is presented based on degree of grey incidence with hybrid discrete variables. Using grey degree of improved absolute incidence, multi-objective optimization design can be convened to...
Based on the exponential trait of grey model and the definition of integral, the reconstruction method of GM(1, 1) modelpsilas background value of non-equal distance sequence was put forward, the approximately expressions of parameters of the background value function were obtained and a kind of non-equidistant optimum grey model GM(1, 1) to test data process was proposed, the method of precision...
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