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1·Periodic error commonly appear in restoring uniform motion blurred picture, its appearance degrade the quality of restored image heavily.

周期性误差是匀速直线运动降质图像复原中普遍存在的现象，它严重影响复原图像质量。

2·The test scheme and identification method were given which solved the problem of periodic error caused by the earth rotation angular velocity.

所提出的测试方案和辨识方法解决了地球自转角速度对陀螺加速度计的输出造成周期性误差这一重要问题。

3·Periodic error, one of the main errors occurring with phase-type optic-electronic rangers, often results in influences seriously affecting the accuracy of measured distances.

周期误差是相位式光电测距仪的主要误差之一，它对测距成果的精度往往产生严重的影响。

4·The characteristics of error motion of shafting is a complex signal which includes periodic component and random term.

轴系回转误差运动的特征是一项复合信号，它含有周期分量和随机分量。

5·The time-frequency domain sampling characteristics of periodic signal, the truncation error and the spectrum leakage error caused by asynchronous sampling are discussed in detail.

讨论了周期信号取样的时域频域特性、非同步取样引起的截断误差和频谱泄漏误差。

6·In the radar elevation coordinate, the multipath effects are more severe, which cause periodic peak error in the target height measurement.

在雷达俯仰角(目标高度)方向上多径误差的影响尤为严重，使得目标高度的测量误差表现为周期性的尖峰误差。

7·The paper analyzes the periodic characteristics of China GDP increasing rate by means of minimal error analytical method and forecasts the GDP increasing rate in a few years.

利用最小偏差分析法，分析了我国GDP增长率的周期性特征，并对我国今后几年的GDP增长率进行了预测。

8·The measurement error caused by finite intervals effect of measured value can be decreased using time cumulation or periodic expansion.

测量取值的有限时宽效应，可以采用时间累积或周期延拓方法，把测量方法误差降到足够小。

9·It is to meet the shortfall of least squares linear coefficients method, gain the information of periodic system error, and improve the precision of electric eddy sensor.

该方法弥补了线性系数最小二乘法的不足，获得了周期性系统误差的信息，提升了电涡流传感器的精度。

10·The error caused by each algorithm was analysed, and some Suggestions for ac periodic signals measurement were provided.

分析了这三种改进算法的误差和性能，供交流周期信号测量选择。