Several kinds of biology models and arithmetic derived from are expatiated, including common immune arithmetic, negative chosen arithmetic, immune study arithmetic, clone chosen arithmetic and so on.

阐述了人工免疫算法的各种生物模型以及衍生出的各种算法，包括一般免疫算法、阴性选择算法、免疫学习算法、克隆选择算法等。

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The objective is to study the impact of extra water on the immune system in mice.

目的是研究多余的水对老鼠免疫系统的影响。

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Scientists who study stress learnt a little stress can make the immune system stronger.

研究压力的科学家们了解到，少量压力可以让免疫系统更强大。

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The Northwestern University researcher took part in a study that found a way to turn off the immune system in mice with arthritis.

VOA: special.2010.03.16

And today, Jan is a pioneer in the study of the immune system and the treatment of inflammatory diseases like arthritis.

WHITEHOUSE: President Obama Honors the Country's Top Innovators and Scientists of 2011 | The White House

Disease-causing germs, which grow and spread on showerheads, can potentially cause threats to people with a weakened immune system, a new study by the National Academy of Sciences found.

CNN: Vital Signs health tips

Outside the brain, stress can wreak havoc on the immune system, according to another study to be presented at the meeting.

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