Objective To diagnose the fibrolamellar hepatocellular carcinoma (FL HCC)with two dimentional and duplex Doppler ultrasonography.
目的应用二维及双功多普勒超声诊断纤维板层性肝细胞癌（FL HCC）。
A quasi-two dimentional analytical model of threshold voltage for non-uniform doped short channel MOSFET is presented in this paper.
本文提出一个非均匀掺杂、短沟道MOSFET阈电压的准二维解析模型。
On the basis of which the two dimentional FFT technology is introduced to analyse the quality of error between the halftone image and the original image.
在此基础上，引入二维FFT技术，对半色调误差图象的质量进行了分析研究。
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