Definition gestational trophoblastic disease(GTD)is a group of disease originated from placental villose trophoblastic cells, including hydatidiform mole, invasive mole, choriocarci- noma and a kind of less common trophoblastic cell tumor in placenta
Handout 2: Gain and Phase margins Eric Feron Feb6,2004 Nyquist plots and Cauchy's principle Let H(s) be a transfer function. eg H(s)= s2+s+1 (s+1)(s+3) Evaluate H on a contour in the s-plane. (your plots here)
