为了进一步提高模型预测的准确度，减小预测误差，本文还对BP神经网络进行改进。
To further improve the forecast accuracy of this model, and reduce its forecast error, I also improve the BP NN in this article.
由于它考虑了几种方法所获结果的权重，因此可减小预测误差，提高预测的准确性，是一种值得推广的预测方法。
It could reduce the forecasting error, improve the forecasting accuracy as it has considered the weights of several methods. It is a spreadable forecasting method.
由于它考虑了几种方法所获得结果的权重，因此可减小预测误差，提高预测的准确性，是一种值得推广的预测方法。
It can reduce the forecasting error, improve the forecasting accuracy as it has considered the weights obtained by several methods. Therefore, this forecasting method is worth spreading.
仿真结果表明，广义预测控制方法能够有效地减小跟踪误差，从而实现精确的地形跟踪。
Simulation results show that the tracking errors can be reduced efficiently and accurate terrain following can also be achieved when the generalized predictive control method is introduced.
该算法利用预测误差阈值进行样本的取舍，在尽量保留有用信息的情况下减小样本训练规模。
This algorithm USES the prediction error threshold to retain the useful information to decrease sample training scale.
为减小城市交通需求预测中由于土地使用分析方面造成的误差，提出了一种基于城市区位差异分析的新的改进方法。
To reduce the error that comes from the analysis about the land use, authors put forward an improvement based on city location difference.
对外汇汇率问题进行的模型构造和预测的结果表明，该方法的预测误差明显减小。
We build models and make predictions for the currency exchange rate, the prediction errors of adaptive modeling method decrease.
结果表明，小波神经网络方法比传统BP网络方法平均预测误差减小了1%，收敛速度加快了3倍。
It is shown that, compared with the results from traditional BP neural network, the average error rate is reduced by 1% and the convergence speed raised by 3 times.
同时采用实际目标跟踪数据进行仿真对比实验，结果验证了此方法有效可行，并且减小了预测误差。
Simulation was made in tracking system using real data. It turned out that the improved EPF is available and effective, which can also decrease the prediction error.
同时采用实际目标跟踪数据进行仿真对比实验，结果验证了此方法有效可行，并且减小了预测误差。
Simulation was made in tracking system using real data. It turned out that the improved EPF is available and effective, which can also decrease the prediction error.
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