Based on the assumption of uniform distribution of single target, the fire efficiency assessment model of single cluster ammunition attacking group targets was set with discrete method.
在假定单个目标均匀分布的基础上，运用离散的方法研究并建立单发子母弹对集群目标射击的效率评定模型。
A grain logistics center location model based on extension theory is put forward, which applies extension decision method, cluster analysis and gravity method together.
综合运用可拓决策方法、聚类分析、重心法，建立了基于可拓理论的粮食物流中心选址模型。
A method based on a cluster model composed by pseudo-atomic orbitals is proposed for the calculation of deep energy levels in semiconductors.
本文提出了由赝原子轨道组成的集团计算半导体中深能级的方法。
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