After the analysis of the updating condition for index table and probability interval, an optimized algorithm based on partial parallel scheme was presented for arithmetic encoder(AE) in JPEG2000.

通过对索引表和概率间隔区间更新条件的分析，提出了一种JPEG2000算术编码器的部分并行优化算法。

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To compare arithmetic performance, the authors also processed the spectral data with partial least squares and PCA-BP neural network.

为了比较算法的性能，作者又分别采用了偏最小二乘法、主成分分析结合BP神经网络进行数据处理。

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To compare arithmetic performance, the authors also processed the spectral data with partial least squares and PCA-BP neural network.

为了比较算法的性能，作者又分别采用了偏最小二乘法、主成分分析结合BP神经网络进行数据处理。

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