scholarly journals The relationship between multi-objective robustness concepts and set-valued optimization

2014 ◽  
Vol 2014 (1) ◽  
pp. 83 ◽  
Author(s):  
Jonas Ide ◽  
Elisabeth Köbis ◽  
Daishi Kuroiwa ◽  
Anita Schöbel ◽  
Christiane Tammer
2013 ◽  
Vol 791-793 ◽  
pp. 1337-1340
Author(s):  
Xue Zhang Zhao ◽  
Ming Qi ◽  
Yong Yi Feng

Fuzzy kernel clustering algorithm is a combination of unsupervised clustering and fuzzy set of the concept of image segmentation techniques, But the algorithm is sensitive to initial value, to a large extent dependent on the initial clustering center of choice, and easy to converge to local minimum values, when used in image segmentation, membership of the calculation only consider the current pixel values in the image, and did not consider the relationship between neighborhood pixels, and so on segmentation contains noise image is not ideal. This paper puts forward an improved fuzzy kernel clustering image segmentation algorithm, the multi-objective problem, change the single objective problem to increase the secondary goals concerning membership functions, Then add the constraint information space; Finally, using spatial neighborhood pixels corrected membership degree of the current pixel. The experimental results show that the algorithm effectively avoids the algorithm converges to local extremism and the stagnation of the iterative process will appear problem, significantly lower iterative times, and has good robustness and adaptability.


2021 ◽  
Author(s):  
Hongwei Xu ◽  
Haibo Zhou ◽  
Zhiqiang Li ◽  
Xia Ju

Abstract Stiffness and workspace are crucial performance indexes of a precision mechanism. In this paper, an optimization method is presented, for a compliant parallel platform to achieve desired stiffness and workspace. First, a numerical model is proposed to reveal the relationship between structural parameters, desired stiffness and workspace of the compliant parallel platform. Then, the influence of the various parameters on stiffness and workspace of the platform is analyzed. Based on Gaussian distribution, the multi-objective optimization problem is transformed into a single-objective one, in order to guarantee convergence precision. Furthermore, particle swarm optimization is used to optimize the structural parameters of the platform, which significantly improve its stiffness and workspace. Last, the effectiveness of the proposed numerical model is verified by finite element analysis and experiment.


2011 ◽  
Vol 48-49 ◽  
pp. 60-63
Author(s):  
Zhi Bin Qin ◽  
Zhao Hui Liu ◽  
Yu Zhi Li

The concept of the road-region ecosystem is described and its environmental features analyzed. In addition, the stability of the road-region ecosystem is summarized. A scientific and rational evaluation of road-region ecosystem stability is proposed to properly investigate the relationship between highway construction and protection of the ecological environment. This paper investigated a method for determining an index system to be used to evaluate road-region ecosystem stability. It put forward an index system for assessing road-region ecosystem stability as a reference. On the basis of detailed analysis of the multidimensional space of the road-region ecosystem, a new method and calculation formula for multi-objective comprehensive evaluation of road-region ecosystem stability are presented. Computation result is fit with the actual situation. The result indicates that the evaluation index system and the method are feasible.


2012 ◽  
Vol 500 ◽  
pp. 466-471
Author(s):  
Zhi Jun Fan ◽  
Zhao Liang Jiang ◽  
Zhi Li

The aim of product configuration is to satisfy the customer's personality requirements with low manufacturing cost. Based on the relationship of customers performance requirements and satisfaction, a method of product configuration optimization was proposed. The customers performance requirements are divided into three types with Kanos theory. A multi-objective genetic algorithm with objectives of performance satisfaction, manufacturing cost and lead time was designed to solve this multi-objective optimization problem. A case study is conducted to demonstrate the effectiveness of the proposed approach.


2019 ◽  
Vol 24 (3) ◽  
pp. 352-359 ◽  
Author(s):  
Naoto Horie ◽  
Tohgoroh Matsui ◽  
Koichi Moriyama ◽  
Atsuko Mutoh ◽  
Nobuhiro Inuzuka

2012 ◽  
Vol 182-183 ◽  
pp. 2071-2074
Author(s):  
Chun Hsiung Lan ◽  
Kuo Torng Lan ◽  
Tzu Ying Hung

This paper proposed a mathematical model called Multi-objective Production System Design (MOPSD) model solved by Ant Colony Optimization (ACO). The MOPSD model placed a production system under the constrained factory space to achieve the minimal total material transportation flow cost. This paper discussed 2-phase pheromone layout procedure that we proposed how to transform the best design information into and the relationship and tracing technology. After modeling experiment we proved it can be put the best design information into 2-phase pheromone layout procedure and achieved the minimal total material transportation flow cost by simply tracing technology.


Author(s):  
Gang Li ◽  
Ye Liu ◽  
Gang Zhao ◽  
Yan Zeng

There are inherently various uncertainties in practical engineering, and reliability-based design optimization (RBDO) and robust design optimization (RDO) are two well-established methodologies when considering the uncertainties. Naturally, reliability-based robust design optimization (RBRDO) is a methodology developed recently by combining RBDO and RDO, in which the tolerances of random design variables are always assumed as constants. However, the tolerance of random design variables is a key factor for the objective robustness and manufacturing cost, and the tolerance allocation is the core problem in mechanical manufacturing. Inspired by the cost–tolerance relationship in mechanical manufacturing, this paper presents an integrated framework to simultaneously find the optimal design variable and the corresponding tolerance in the multi-objective RBRDO, with the trade-off between objective robustness and manufacturing cost. The failure mechanism of the constraint handling strategy of the constrained reference vector-guided evolutionary algorithm (C-RVEA) is discussed to solve the multi-objective optimization formulation. Then the robust repair operator and reliability-based repair operator are proposed to transform unfeasible solutions to the feasible ones under reliability constraints. Numerical results reveal that the proposed repair algorithm is effective. By solving the integrated multi-objective optimization problem, the Pareto front with the compromised solutions between the objective robustness and manufacturing cost could be obtained, from which decision makers can select the satisfying solution conveniently according to the preferred requirements.


2019 ◽  
Vol 49 (9) ◽  
pp. 3447-3463 ◽  
Author(s):  
Juan Carlos Fernández ◽  
Mariano Carbonero ◽  
Pedro Antonio Gutiérrez ◽  
César Hervás-Martínez

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