根据数值计算误差的特点分析及小波包多尺度、高分辨的特性，设计了一种基于小波包的滤波器，较好地解决了消除数值积分计算引入误差的问题。
A filter is designed based on wavelet packet according to the features of numerical integral errors and those of multiple scales and high resolving power of wavelet packet.
针对传统的畸变图像校正方法，其所建立的畸变数学模型，不仅求解畸变参数复杂、计算量大，且存在很大的数值计算误差的问题，提出了一种基于神经网络的畸变图像校正方法。
According to the graphic distortion of the laser galvanom, a kind of conic calibration model was put forward based on post-validation of geometry distortion caused by the imaging system.
本文讨论了大降深矿井排水预测中 ，利用迭代法求解数值模型时 ，地下水位计算误差的影响因素。
The influential factors of calculation error for groundwater table are discussed by using the iteration method to find solution of numerical model in the mine drainage forecast of deep drawdown.
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