Robotics and Automation in Construction 2012 Part 5

Tham khảo tài liệu 'robotics and automation in construction 2012 part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 114 Robotics and Automation in Construction Network analysis of the evacuation path This part we use Best Route to calculate the optimum. We use distance and deliver time to search for the least accumulative cost like Fig. 23 and Fig. 24. In Fig. 23 Best Route calculates the least accumulative cost by the distance. But in Fig. 24 is depends on deliver time. There are some different evacuation paths in the tow figure. The reason of the different is the class of the path. The high level paths get the short deliver time but these cost more distance. So we get the different optimum with Best Route. Fig. 23. Fig. 24. Network Analysis of the Evacuation Path Working data and parameter setting Before process the GA calculation we must to precede the pattern of Gene Coding. Let the variables indicate the suitable sequence in the computer operating. And we decoding it and return the result like Fig. 25 . Final we set the parameter like Initial population crossover rate and mutation rate. After we coding the refuge node we can create initial population and choose the start node. This study on GA s parameter set up 1500 initial populations and it has crossover rate and mutation rate. Fig. 25. The refuge node coding To search evacuation path we use GA technique to get an answer belong to the problem form of the limited type model. The region of answer could be very small. The result could be segment to several areas. It would have low rate to get optimization answer with this model and the rate of best answer also obvious level down. Generally speak the best answer often appearance on cape area that on the boundary region of the feasible solution. If we only adopt the information of the feasible solution it would increase search time and difficulty. Applications of Computer Aided Design to Evaluate the Zoning of Hazard Prevention in Community Neighbours 115 Gen 1997 use GA to solve the limited type of problem model it will often appear the result that not .

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