After a development iteration produces a deployable, working build of the application, business analysts can monitor the live performance of the system by tracking key performance indicators (KPIs).

开发迭代产生应用程序的可部署工作版本(应用程序的工作构建)后，业务分析人员可以通过跟踪关键性能指标(Key Performance Indicator, KPI)来监视系统的实时性能。

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Each base class is responsible for tracking performance before and after certain operations and will need to update system-wide performance statistics for that information.

每个基类负责跟踪某项操作前后的性能，还需要更新系统范围内这条信息的性能统计值。

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The experimental result shows that the tracking performance will be improved by selecting proper features, using word segmentation system and using named entity recognition system.

实验结果显示选取适当的特征数目、使用好的分词技术、使用命名实体识别技术都能改进中文话题追踪系统的性能。

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