The method applies LDA model on temporal news reports to extract news topics, the number of topics in different time periods is different.
首先应用LDA对不同时间段的文集进行话题的自动抽取，话题数目在不同时间段是可变的；
A model for predicting the tumble speed is derived and verified by the steady flow rig and the in-cylinder flow measurement results by a LDA system.
据此建立了缸内滚流比预测模型，并在稳流试验和拖动工况下缸内流动的LDA测量试验中得到验证。
A model for predicting the tumble speed is derived and verified by the steady flow rig and the in-cylinder flow measurement results by a LDA system.
据此建立了缸内滚流比预测模型，并在稳流试验和拖动工况下缸内流动的LDA测量试验中得到验证。
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