Results: In the 60 cases of endograft collapse, TEVAR had most commonly been applied to repair traumatic thoracic aortic injuries (39, 65%), followed by acute and chronic type B aortic dissections (9, 15%). The median time interval between TEVAR and diagnosis of endograft collapse was 15...
G Belli,F Walter,B Mcardell,... - 《Journal of Geophysical Research Earth Surface》 被引量: 0发表: 2022年 Debris flows monitoring and localization using infrasonic signals Infrasonic waves (frequency 鈮 20 Hz) are generated during the formation and movement of debris flows, traveling in air ...
The computational complexity of the determination of the electric properties varies considerably with cluster size. B3LYP and conventional ab initio values are not in good agreement for the monomer but the gap is drastically reduced for the... ...
Efficient algorithms are known for the simple linear programming problem where each inequality is of the form x j x i 鈮 a ij. Furthermore, these techniqu... OA Davis,AB Whinston 被引量: 75发表: 1961年 Inequalities for the Maximum Modulus of the Derivative of a Polynomial Let P(z) be...
B={y|y=2x,x>0}={y|y>1} 隆脿?RA={x|x鈮�0或x鈮�3} 隆脿(?RA)隆脠B={x|x鈮�0或x>1}. 故选:A. 化简集合AB根据补集与并集的定义写出(?RA)隆脠B. 本题考查了集合的化简与运算问题,是基础题. 【解析】 A 二、填空题(共9题,共18分) 6、略 【分析】 【分析】求函数的导数...
As in the two-person case, the N-person "Dilemma-Type" Game (N鈮 3) involves a conflict between maximizing personal gain (individual interests) and maximizi... S S.,Komorita - 《Journal of Experimental Social Psychology》 被引量: 110发表: 1976年 Perfect equilibria of a model of n-pers...
如图,在平面直角坐标系中,O为坐标原点,点 A、B在x轴正半轴上,点C在y轴正半轴上,连接AC、BC,tan∠CAO=43,tan∠CBO=12,AB=5.(1)求点C的
【解答】解析:(1)如图,以AB所在直线为x轴,AB中垂线为y轴建立直角坐标系,⇒A(-1,0),B(1,0)y D E C A 0 B X设椭圆方程为:x2a2+y2b2=1令x=C⇒y0=b2c∴C=1b2a=32⇒a=2b=3∴椭圆C的方程是x24+y23=1(2)(文)l⊥AB时不符合,∴设l:y-12=k(x-1)(k≠0)设M(x1,y1),N(...
锛屼笖a鈮?锛屸埓0锛渁锛?锛孅img src="http://qz-question.oss-cn-beijing.aliyuncs.com/qing%2F0decdd1acadca9ab855c4bdb0b788443.jpg" zwidth="502" zheight="22" />鈭祙f锛坸锛?g锛坸锛墊鈮?鈭滁img src="http://qz-question.oss-cn-beijing.aliyuncs.com/qing%2Fe8fe4d85...
如图,在平面直角坐标系中,点0是坐标原点,直线y=x+4分别交x轴、y轴于点 A、点B,直线y=-2x+b分别交x轴、y轴于点 C、点D,且0C=20B.设直线AB、CD相交于点E.(1)求直线CD的解析式;(2)动点P从点B出发沿线段BC以每秒钟√5个单位的速度向点C匀速移动,同时动点Q从点D出发沿线段DC以每秒钟2√5...