基于改进型灰狼算法的γ能谱解析应用研究  

Application research ofγenergy spectrum analysis based on improved grey wolf algorithm

作　　者：刘薇 赵剑锟 刘义保[1,2] 李蔚成 邢义强 LIUWei;ZHAO Jiankun;LIU Yibao;LIWeicheng;XING Yiqiang(Engineering Research Center for Nuclear Technology Application Ministry of Education,East China Institute of Technology,Nanchang 330013,China;College of Nuclear Science and Engineering,East China Institute of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学核技术应用教育部工程研究中心,南昌330013 [2]东华理工大学核科学与工程学院,南昌330013

出　　处：《核技术》2021年第4期27-32,共6页Nuclear Techniques

基　　金：核技术应用教育部工程研究中心开放基金资助项目(No.HJSJYB2020-5);国家自然科学基金(No.11805032);江西省研究生创新基金(No.YC2020-S491);教育部产学合作协同育人项目(No.202002088002)资助。

摘　　要：针对传统γ能谱解析存在时间长、步骤多、精度低等缺点,在定性分析的基础上提出了一种改进型灰狼算法的γ能谱解析方法。采用基于倒S型曲线的收敛因子,保持算法全局搜索与局部搜索之间的平衡,解决了灰狼算法易陷入局部最优的问题;引入逐维更新策略,提高了寻优的精度和效率。对土壤标准源和马林杯标准源进行测量实验,结果证明:改进后的灰狼算法对多核素混合γ能谱解析效果较好,解析速度相较原始灰狼算法提升了近59%,土壤标准源中所有核素解析误差均可控制在±10%,8种核素平均绝对误差在4%以内;马林杯标准源中除^(226)Ra和^(235)U外,其他核素误差均小于10%,8种核素平均绝对误差在7%以内。[Background]Traditionalγenergy spectrum analysis methods have the disadvantages of long time,many steps and low accuracy.[Purpose]This study aims to propose an improved gray wolf algorithm based on qualitative analysis to obtain nuclide information faster and more accurately.[Methods]The convergence factor based on the inverted S-curve was adopted in the improved gray wolf algorithm to maintain the balance between the global search and the local search of the algorithm,and solve the problem of local optimum that the original gray wolf algorithm fallen into easily.A dimension-by-dimension update strategy was introduced to improve the accuracy and efficiency of optimization.Finally,this improved gray wolf algorithm was applied to experimental test on the gamma spectra of"Soil standard source"and"Marin cup standard source".[Results]Experimental results show that the improved gray wolf algorithm has a better analysis effect on multi-nuclides mixed gamma spectra.The analysis speed is 59%faster than the original gray wolf algorithm.The analytical error of all nuclides in the soil standard source can be controlled within±10%.The average absolute error of 8 nuclides is within 4%.Except for ^(226)Ra and ^(235)U in the Marin Cup standard source,the errors of other nuclides are less than 10%.The average absolute error of the 8 nuclides is within 7%.[Conclusions]The improved gray wolf algorithm provides a new method for rapid analysis of nuclides.

关 键 词：γ 能谱 定量分析 灰狼算法 倒S型曲线 逐维更新 

分 类 号：TL82[核科学技术—核技术及应用]