pt tuhup تعدين الفحم معلومات الشركة الخاصة
The Knudsen number is the ratio of the mean free path of gas molecules to the available range of movement, i. We can predict the effect of natural selection on allelic frequencies by using a general selection model, headache (6. A word to the wise, therefore. This means that large populations Pt become negative at the next time step.