likun_hou
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Member since ‎01-25-2016

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Gradient Boosting is an ensemble machine learning algorithms, it is used to build predictive models for both regression and classification problems. In gradient boosting, a weak predictive model, typically a decision tree, is trained on the input dat...
In a few related blog posts[1][2], we have shown the analysis of time-series using traditional approaches like seasonal decomposition, ARIMA and exponential smoothing. However, those traditional approaches have some drawbacks for time-series analysis...
In this blog post, we will show users how to perform time-series modeling and analysis using SAP HANA Predictive Analysis Library(PAL). Different from the original SQL interface, here we call PAL procedures through the Python machine learning client ...
In a few separate blog posts, we have discussed the problem of anomaly detection in dataset with multiple features using techniques like one-class classification, clustering(DBSCAN) as well as statistical tests. However, all the aforementioned techni...
We have introduced several methods for outlier detection in a few separate blog posts, inclusive of outlier detection using statistical tests and clustering. Typically, these methods can only detect outliers the input dataset, and the detection resul...