本文探讨了用神经网络从模式中自动抽取特征向量并确定特征向量是否已具有足够特征信息的方法，给出了计算机模拟的结果。
In this paper, we have studied the method of drawing automatically from pattern and assessing whether feature vectors contain enough feature information. The result of computer simulation is given.
该系统从文献的题名中抽取并识别主题模式，相当有效地解决了医学科技文献的自动标引中涉及的主题词和副主题词的组配问题。
The system has a relatively high performance in subject indexing problem, which involves the procedure of combination of medical headings and subheadings.
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