采用含电机电压模型和电机电感模型的观测器，在低速时注入测试信号，可以得到位置和速度信号。
Position and speed are obtained by an observer using a voltage and an inductance motor model together with test signal injection at low speed.
图像匹配是图像导航中的关键技术，图像匹配系统在实时图和基准图之间寻找匹配位置，得到位置信息提供给航行器。
Image match is critical technique in image aided navigation. Image match system finds correspondence between real image and base image and then outputs the position parameters to the aircraft.
谈到具体的，涉及到位置，你正在申请。如果你没有具体的经验，得到接近，你可以这样做。
Speak about specifics that relate to the position you are applying for. If you do not have specific experience, get as close as you can.
当安放在离钻头较近的位置时，无需常规的第二趟钻进行口袋扩眼，井眼条件可得到极大的改善，套管可以更快下到位。
When placed near the bit, the traditional second rathole reaming run is eliminated, wellbore conditions are improved, and casing can be run that much faster.
当安放在离钻头较近的位置时，无需常规的第二趟钻进行口袋扩眼，井眼条件可得到极大的改善，套管可以更快下到位。
When placed near the bit, the traditional second rathole reaming run is eliminated, wellbore conditions are improved, and casing can be run that much faster.
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