dilations

与dilations相关的网络例句 [注：此内容来源于网络，仅供参考]

CT finding is round and elliptic dilations of common bile duct.1 case is multiple localized cysts of intrahepatic bile ducts.CT finding is multiple limitative dilations of intrahepatic bile ducts.2 cases are cysts in both intrahepatic and extrahepatic bile ducts.2 cases of CT cholangiography show that contrast media were in the cysts.

结果：10例胆总管呈圆形或椭圆形扩张，1例肝内胆管呈多发性局限性囊状扩张，2例同时累及肝内、外胆管，2例胆系造影CT扫描，造影剂进入囊肿内。

INTRODUCTION: In esophageal achalasia, pneumatic dilations proide short-term and long-term remission rates of 60–90% and 40–50%, respectiely.

目的： 对于贲门失弛缓症患者，球囊扩张的短期和长期复发率分别为60–90%和 40–50%。

Combining the definition of CWT and the derivative property of convolution, we constructed a general method to calculate the approximate derivative of signal through CWT by using the first and second derivative of Gaussian function, Haar, and the first derivative of three-order-Spline function as wavelets. As compared with the other approaches of calculating derivative, which include the numerical differentiation, polynomial filters, Fourier transform, and the recently proposed DWT method, fast calculation and simple mathematical operation were remarkable advantages of CWT method. For the signal corrupted by severe noise (Signal-toNoise Ratio=5), the satisfactory results could also obtained via CWT method through appropriately adiusting the dilations.

在此基础上，(1)结合连续小波变换的特点和卷积的微分性质，提出了使用Gaussian函数的一阶和二阶导数，Haar和三次样条函数的一阶导数作为小波函数的连续小波变换计算信号近似导数的一般性方法，与其他导数计算方法(包括数字微分法，多项式滤波法，Fourier变换法和离散小波变换法)相比，本法简单便捷，计算速度快，对于噪声含量较高的信号(S/N为5)，只要适当调节尺度即可获得比较满意的结果。