1) Frequency standard comparison based on dual-phase detecting
双相检频标比对
2) frequency standard comparison
频标比对
1.
High resolution frequency standard comparison method;
一种高精度频标比对方法
2.
Based on the recognition of periodic law of phase variance between two periodic frequencies, on the reference of previous frequency standard comparison methods and the basis of phase-coincidence theory, this paper represents a new double phase-detecting freque.
随着科技的高速发展，对原子频标和频标比对精度的要求也愈来愈高，设计出能实现高精度频标比对的仪器设备，在当今的时频测量领域有着十分重大的意义。
3.
A frequency standard comparison platform based on beat-frequency technique has been designed to evaluate the difference of performance between the periodic frequency measurement with counter and the digital beat-frequency signals processing with computer, the fundamental of measurement and realization of the two sets of systems are analyzed.
针对差拍计数器测量系统和差拍数字频标比对系统各自的频率测量特性、精度表现等方面的差异,建立了基于差拍技术的频标比对平台以便进行测试比较。
3) dual-frequency phase comparing
双频比相
1.
An algorithm of range based on group- frequency agile and dual-frequency phase comparing is proposed,which gains information of range using phase difference between echoes.
提出了采用基于双频比相和组频率捷变的测距算法,解决了测距精度与测距范围之间的矛盾。
4) Double contrust radiography
双对比相
5) Frequency comparator
频标比对器
6) GI series
双对比造影检查
1.
Now the recognized point is following:GI series is still the preferred examination on gastric cancer,CT and MRI have great potential of pre-operation diagnosis and staging,yet have inhered limit,combine of various examination will improv.
目前较为成熟的观点是双对比造影检查依然是胃癌检测首选方法,CT和MRI在胃癌的诊断和分期上具有巨大的潜力,但有其固有的局限性,多种检查方法的联合应用将进一步提高胃癌术前检查的准确性。
补充资料：标检
1.犹标榜。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条