经改进后，又产生新的问题，需进一步改进。
A new question was shown after the improvement, It is necessary to further improver.
但其中也有一些不尽合理的地方，需进一步改进和完善管理办法。
But there were some unreasonable places, so it needed more ameliorate.
为有效提高矢量量化码书的性能和学习效率，需进一步改进自组织神经网络的学习算法。
Self-organizing neural network is a very efficient method for pattern recognition and vector quantization(VQ).
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