It is a part of muon tomography algorithms research for Fissile Nuclear Materials Detection. As muon Tomography objectives have a objective condition that the quality of particles is small, the work accords with gray system theory which have the features of little sample and incomplete information. Cray relational cluster method is applied for materials detection of the research of muon tomography for the first time.%该工作为宇宙线μ子探测裂变核材料研究中的一部分.宇宙射线μ子成像目标存在粒子数偏少的客观条件,符合灰色系统理论的“小样本”、“贫信息”的特点,首次探索应用灰色关联聚类分析提高宇宙射线μ子成像中对物质区分效率的方法.
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