摘要
将模拟植物生长算法应用于辐照装置上的源棒的排列优化工作。提出了以参考点群的照射量率的相对标准误差为目标函数来评价源棒排列方案的方法,并对把源棒在源架上的位置坐标xj和yj这两类控制变量转换为合适的整形变量做了分析和处理。通过实例计算表明:兼具随机性和方向性搜索机制的模拟植物生长算法具有很好的全局搜索能力,且使用方便;计算结果受初始值影响较小,提高了辐射场的均匀性,这为辐照装置上的源棒的排列优化工作提供了可靠的解决途径。
A plant growth simulation algorithm was proposed for optimizing source pencil deployment for a ^60Co irradiator. A method used to evaluate the calculation results was presented with the objective function defined by relative standard deviation of the exposure rate at the reference points, and the method to transform two kinds of control variables, i.e., position coordinates xj and yj of source pencils in the source plaque, into proper integer variables was also analyzed and solved. The results show that the plant growth simulation algorithm, which possesses both random and directional search mechanism, has good global search ability and can be used conveniently. The results are affected a little by initial conditions, and improve the uniformity in the irradiation fields. It creates a dependable field for the optimization of source bars arrangement at irradiation facility.
出处
《核技术》
CAS
CSCD
北大核心
2009年第12期915-921,共7页
Nuclear Techniques
关键词
模拟植物生长算法
辐照装置
排列
相对标准误差
Plant growth simulation algorithm, Gamma-ray irradiator, Source pencil deployment, Relative standard deviation
