To investigate the value of color Doppler ultrasound in differentiation of benign and malignant solid superficial soft-tissue tumors using receiver operationcharacteristiccurve(ROC curve).
应用受试者工作特征曲线(ROC曲线)评价彩色超声判断实性浅表软组织肿物良恶性的价值。
2
Least square method of polynomial or the method based on the given function are used to fit pump characteristiccurve in pump selection or operation.
在水泵的选型或运行中,通常采用多项式的最小二乘法或根据假设的函数关系来拟合水泵性能曲线。
3
During the constant speed operation, the motor could be smoothly in a natural characteristiccurve and would have a full new function of the stepless stable speed regulation.