,因为M是线段PN的中点,所以 , 又因为M,N是圆上的任意两点,则有0< ≤2r,即0< ≤8r2. 设动点P(x,y),圆心C坐标为(3,2),则有0<(x-3)2+(y-2)2-r2≤8r2,即r2<(x-3)2+(y-2)2≤9r2,在一个圆环内,又因为P在直线3x+y=3上,所以直线3x+y=3与圆环有公共点,即直线与圆(x-3)2+(y-...
Building Specialized Palliative Care for the Czech Republic: A Fifteen-Year Leadership Journey in a Developing Country Since its creation, the Czech Republic has developed an advanced health system and social system. Life expectancy at birth has increased by an average of 7... L Kabelka - 《Jou...
The research is done to identify the constructs which effect the performance of a healthcare firm. Specifically, a mediating variable has been utilized to establish a relationship between the latent variable and a dependent variable. The... A Verma - 《Strad Research》 被引量: 0发表: 2020年 ...
BLCD initially uses heuristic greedy search to derive the Markov Blanket (MB) of a node that serves as the "locality "for the identification of pair-wise causal relationships. BLCD takes as input a dataset and outputs potential causes of the form variable X causally influences variable Y. ...
目的观察和评价雷贝拉唑联合莫沙必利治疗返流性食管炎的临床疗效.方法将我院确诊为返流性食管炎的患者分雷贝拉唑联合莫沙必利组(A组),法莫替丁联合莫沙必利组(B组),对... 陈荣伟,李强 - 《基层医学论坛》 被引量: 39发表: 2006年 奥美拉唑联合木香顺气丸治疗反流性食管炎疗效观察 目的 观察奥美拉唑联...