The accuracy of a knowledge base can be maintained and improved over time by providing it with feedback -- confirmation or correction of the current categorization.
通过向知识库提供反馈（对当前的分类进行确认或纠正），知识库的精确性可以随着时间的推移得以维持和提高。
On the base of a plenty of facts we suggested a method in which bi-Gaussian form is approached the output pulse in multimode fibers The accuracy measuring band in time domain can be improved highly.
在综合大量实例的基础上，提出双高斯函数逼近多模光纤的光脉冲输出的解析近似方法，使时域法确定光纤带宽的精度大为提高。
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