In this algorithm, the measured value of seeker initially set in polar coordinate system was converted into the rectangular coordinate system for filtering, and the bias was eliminated.

该滤波算法将球坐标系中的测量信息转换到直角坐标系下进行滤波，并消除了偏差。

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In the rectangular coordinate system, we express the electric field intensity and different position electric field energy of the elliptical ring with positive electric charge in the central axis.

在直角坐标系中分别表示出了均匀带电椭圆形环在中心轴线上任意位置处的电势及电场。

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In a. plane rectangular coordinate system, mathematics simulation of the change of moisture content in a corn kernel during tempering is presented by the finite element method.

在平面直角坐标下，利用有限元方法，对玉米颗粒在缓苏过程中的含水量变化进行了数学模拟。

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