qdd

Results Compared with those in the flunarizine group, clinical curative effect was better, recurrent rate lower, symptom score higher, hemorheological parameters and transcranial doppler indexes were improved more significant in the QDD group ( P < 0.01 or P < 0.05).

结果治疗组临床疗效、复发率、症状评分、血液流变学及经颅多普勒指标改善均优于对照组（P<0·05或P<0·01）。

A Quadrature Direct Digital Frequency Synthesizer ( QDDS ) based on CORDIC algorithm is presented.

设计了一种基于CORDIC算法的正交输出直接数学频率合成器 ( QDDS ),并在ALTERAFLEX10K系列 FPGA上 予以实现.

The weak solutions to the stationary quantum drift-diffusion equations ( QDD) for semiconductor devices are investigated in one space dimension.

研究了半导体器件中量子漂移扩散模型（QDD）的一维稳态模型。