VFC abbr. 心室功能曲线(ventricular function curve)
- CPLD is used to control AD652 to achieve 20 bits high accuracy AD conversion by adopting voltage-frequency-conversion (VFC) method.
文中所述系统采用压频转换的方法,由CPLD控制压频转换器(AD652)完成20位的高精度模数转换; - Second, the locations and contours of polysaccharides are used to initialize VFC. Then the polysaccharides are accurately detected by the active contour model.
其次,利用粗提取得到的多糖分子位置和轮廓来初始化VFC活动轮廓,再进行活动轮廓变形来精确地检测多糖分子。 - In addition, the data stability of VFC running in the high full scale output frequence and high sampling frequency conditions are analysed and some useful conclusions are obtained.
此外,分析了VFC型模数转换在高输出频率、高采样率情况下数据的稳定性,并得出了有益的结论。