亲和数

When I looked up at John again, he was barely able to contain his excitement anymore."They're amicable numbers," he said."I wrote a computer program and let it run for twelve hours. These were the biggest ones I found, and then I double-knitted them in. I thought you might like it."

我抬头再看约翰，他已难掩兴奋之情："这是一组亲和数，"他解释道，"我编了个程序，让它运行了十二个小时，这是我能找到的最大一组亲和数，然后我把它们织进布料的两面，我想你也许会喜欢。"

The discussion is based on some property of arithmetic function.

为了判断整数是否为亲和数，在讨论数论函数性质的基础上，找到一种验证一个整数是否是亲和数的方法，从而给出了f=x2x+1不与任何正整数构成亲和数的结论，这里x为偶数，即关于y的方程σf(x=σ=f+y不存在正整数解。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。