This paper aims at comparing the above two cities from the geographical position, layout, structure and defensive system to have a deep understanding of the capitals during the Warring States Period.

本文从地理位置、布局形制和防御体系三个方面对以上两城进行了比较，以期对战国时期列国都城有更进一步的认识。

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"Beidou" double satellite positioning system, adopting two geosynchronous satellites to position, has the characteristic of high precision in positioning and active positioning mechanism.

北斗双星定位系统(简称双星定位)利用两颗地球同步卫星进行定位，具有定位精度高、采用有源定位体制的特点。

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To reduce cost of the two dimension position system, a method using linear array charge coupled device (CCD) was proposed.

为了降低二维位置定位系统的成本，提出了一种基于线阵列电荷耦合器件(CCD)的测量方法。

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