在筛法和费尔马小定理的基础上，利用索阶乘及判别数对如何判别一个整数是否是一个素数的算法加以改进。
The algorithm of distinguishing prime number is improved on the basis of Eratosthenes' sieve method and Fermat 's minor theorem.
结果：建立了周围型肺癌影像计量诊断组织学分型的判别数学模型，使其诊断符合率由4 2 1%提高到71 9%。
Results Founded the distinguish mathematics model about histology pattern of imagiologic measurement diagnosis on peripheral lung cancer, promote its accurate rate from 42% to 71 9%.
结果：建立了周围型肺癌影像计量诊断组织学分型的判别数学模型，使其诊断符合率由4 2 1%提高到71 9%。
Results Founded the distinguish mathematics model about histology pattern of imagiologic measurement diagnosis on peripheral lung cancer, promote its accurate rate from 42% to 71 9%.
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