Probes into a new and effective method in arranging the powerhouses of tank & armored vehicles. Theory and method of 3-dimensional rectangular packing are adapted to arrange effectively almost all the systems and ...Probes into a new and effective method in arranging the powerhouses of tank & armored vehicles. Theory and method of 3-dimensional rectangular packing are adapted to arrange effectively almost all the systems and components in the powerhouse of the vehicle, thus the study can be regarded as an attempt for the theory's engineering applications in the field of tank & armored vehicle design. It is proved that most parts of the solutions attained are reasonable, and some of the solutions are innovative.展开更多
A new 3D layout algorithm to lay rectangular tiles on the 3D hull surface model is proposed to improve the algorithm performance in accelerating layout process and enhancing design accuracy. Three times optimizations ...A new 3D layout algorithm to lay rectangular tiles on the 3D hull surface model is proposed to improve the algorithm performance in accelerating layout process and enhancing design accuracy. Three times optimizations are carried out upon the original basic algorithm, namely optimization of calculating range, separation of surface flattening computation from laying computation, and optimization of interior point distribution. By testing, the generated surface layout drawing by the refined system is fairly applicable to guide the actual tiles＇ coating process.展开更多
The meta-heuristic algorithm is a global probabilistic search algorithm for the iterative solution.It has good performance in global optimization fields such as maximization.In this paper,a new adaptive parameter stra...The meta-heuristic algorithm is a global probabilistic search algorithm for the iterative solution.It has good performance in global optimization fields such as maximization.In this paper,a new adaptive parameter strategy and a parallel communication strategy are proposed to further improve the Cuckoo Search(CS)algorithm.This strategy greatly improves the convergence speed and accuracy of the algorithm and strengthens the algorithm’s ability to jump out of the local optimal.This paper compares the optimization performance of Parallel Adaptive Cuckoo Search(PACS)with CS,Parallel Cuckoo Search(PCS),Particle Swarm Optimization(PSO),Sine Cosine Algorithm(SCA),Grey Wolf Optimizer(GWO),Whale Optimization Algorithm(WOA),Differential Evolution(DE)and Artificial Bee Colony(ABC)algorithms by using the CEC-2013 test function.The results show that PACS algorithmoutperforms other algorithms in 20 of 28 test functions.Due to the superior performance of PACS algorithm,this paper uses it to solve the problem of the rectangular layout.Experimental results show that this scheme has a significant effect,and the material utilization rate is improved from89.5%to 97.8%after optimization.展开更多
树图是一种实用的层次数据可视化方法,由于其数据属性和分析任务具有多样性,单种树图布局算法难以满足各层数据的显示需求.文中介绍了Slice and Dice,Squarified,Pivot-by-middle,Pivot-by-size,Pivot-by-split-size,Strip,Spiral和Orde...树图是一种实用的层次数据可视化方法,由于其数据属性和分析任务具有多样性,单种树图布局算法难以满足各层数据的显示需求.文中介绍了Slice and Dice,Squarified,Pivot-by-middle,Pivot-by-size,Pivot-by-split-size,Strip,Spiral和Ordered-Squarified 8种典型的矩形树图布局算法,给出了评价它们的6项性能指标定义,具体包括平均长宽比、连续性、可读性、平稳性、平稳的平衡性和距离相关性.通过实验,采用这6项性能指标对8种算法进行了比较分析,给出实验和分析结果.同时提出了多种布局算法混合使用的优化方案,并进行了优化后的指标分析,其结果可为树图布局算法的选择提供参考.展开更多
基金Sponsored by the National Natural Science Foundation of China under Grant( 50335040).
文摘Probes into a new and effective method in arranging the powerhouses of tank & armored vehicles. Theory and method of 3-dimensional rectangular packing are adapted to arrange effectively almost all the systems and components in the powerhouse of the vehicle, thus the study can be regarded as an attempt for the theory's engineering applications in the field of tank & armored vehicle design. It is proved that most parts of the solutions attained are reasonable, and some of the solutions are innovative.
基金Supported by the Fundamental Research and Application Fund for Ship Industry (04J1.13.3)
文摘A new 3D layout algorithm to lay rectangular tiles on the 3D hull surface model is proposed to improve the algorithm performance in accelerating layout process and enhancing design accuracy. Three times optimizations are carried out upon the original basic algorithm, namely optimization of calculating range, separation of surface flattening computation from laying computation, and optimization of interior point distribution. By testing, the generated surface layout drawing by the refined system is fairly applicable to guide the actual tiles＇ coating process.
基金funded by the NationalKey Research and Development Program of China under Grant No.11974373.
文摘The meta-heuristic algorithm is a global probabilistic search algorithm for the iterative solution.It has good performance in global optimization fields such as maximization.In this paper,a new adaptive parameter strategy and a parallel communication strategy are proposed to further improve the Cuckoo Search(CS)algorithm.This strategy greatly improves the convergence speed and accuracy of the algorithm and strengthens the algorithm’s ability to jump out of the local optimal.This paper compares the optimization performance of Parallel Adaptive Cuckoo Search(PACS)with CS,Parallel Cuckoo Search(PCS),Particle Swarm Optimization(PSO),Sine Cosine Algorithm(SCA),Grey Wolf Optimizer(GWO),Whale Optimization Algorithm(WOA),Differential Evolution(DE)and Artificial Bee Colony(ABC)algorithms by using the CEC-2013 test function.The results show that PACS algorithmoutperforms other algorithms in 20 of 28 test functions.Due to the superior performance of PACS algorithm,this paper uses it to solve the problem of the rectangular layout.Experimental results show that this scheme has a significant effect,and the material utilization rate is improved from89.5%to 97.8%after optimization.
文摘树图是一种实用的层次数据可视化方法,由于其数据属性和分析任务具有多样性,单种树图布局算法难以满足各层数据的显示需求.文中介绍了Slice and Dice,Squarified,Pivot-by-middle,Pivot-by-size,Pivot-by-split-size,Strip,Spiral和Ordered-Squarified 8种典型的矩形树图布局算法,给出了评价它们的6项性能指标定义,具体包括平均长宽比、连续性、可读性、平稳性、平稳的平衡性和距离相关性.通过实验,采用这6项性能指标对8种算法进行了比较分析,给出实验和分析结果.同时提出了多种布局算法混合使用的优化方案,并进行了优化后的指标分析,其结果可为树图布局算法的选择提供参考.
