Background: The water entry of a submersible aircraft, which is transient, highly coupled, and nonlinear, is complicated. After analyzing the mechanics of this process, the change rate of every variable is considered. A dynamic model is build and employed to study vehicle attitude and overturn phenomenon during water entry.
View Article and Find Full Text PDFZhonghua Fu Chan Ke Za Zhi
November 2007
Objective: To investigate the management of pregnancy and cardiovascular complications in women with Marfan syndrome (MFS).
Methods: From October 1994 to September 2006, 30 patients with MFS undergoing cardiovascular surgery were studied retrospectively.
Results: In the labor of 46 offsprings given birth by 30 women, 5 cases (11%) were performed elective cesarean section because of the existence of aortic complication, and 12 (26%) were diagnosed as MFS.
Beijing Da Xue Xue Bao Yi Xue Ban
April 2007