结论彩色多普勒超声检查是诊断睾丸扭转的首选辅助检查，早期诊断及手术探查可以提高睾丸的存活率。
Conclusion Color doppler ultrasound is the first choice in assistant diagnosis of testicular torsion. Earlier diagnosis and operations research could improve the testicular survival rate.
高动态环境会造成较大的多普勒频移，这使得一般的GPS接收机在没有外界辅助的情况下难以可靠工作。
High dynamic environment may cause a large Doppler shift, thus the general GPS receiver is difficult to work reliably without outside assistance.
高动态环境存在较大的多普勒频移，这使得普通的GPS接收机在没有惯导辅助的情况下很难可靠工作。
There is great Doppler frequency shift under high dynamic circumstances, thus the common GPS receiver cannot work reliably without the help of inertial navigation devices.
胎盘血管瘤在产前不易确诊，彩色多普勒超声是产前诊断胎盘血管瘤的唯一辅助手段。
Color Doppler is helpful to differential diagnosis of placental masses particularly placental chorioangioma, though the later is difficult to diagnose artte partum.
多普勒主动雷达导引头(ARS)可利用波束速度连续辅助惯导，弥补“北斗”系统无速度信息、不能全程使用的缺点。
While Doppler Active Radar Seeker (ARS) could be aided SINS by beam velocity all The Times and remedy the BDS's default of lacking velocity information and continual working ability.
基于卫星轨道可模化、可预测的特性，提出了利用轨道预报得到的多普勒频移来辅助环路跟踪的新方法。
So the method that the Doppler frequency shift which obtained using theforecast approach aids the carrier tracking loop is proposed.
结论多普勒超声听诊器辅助中心静脉穿刺置管可提高穿刺成功率。
Conclusion Doppler ultrasonic stethoscope-assisted central venous puncture and catheterization is superior to the conventional technique with higher success rate.
经颅超声多普勒可为诊断该病的重要依据，并可作为判断发作期病情轻重的辅助手段。
TCD study may be useful in diagnosis of vascular magraine and supply a good index for judging the severity of the disease.
经颅超声多普勒可为诊断该病的重要依据，并可作为判断发作期病情轻重的辅助手段。
TCD study may be useful in diagnosis of vascular magraine and supply a good index for judging the severity of the disease.
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