However, for more complex metrics like Nb /Na, lack of precision of point estimates may limit utility of linear models for trend detection, and for outlier analysis of specific time periods.
This includes change management, trend detection, model evolution, streaming data and stream reasoning, event processing, time-and space dependent models, contextual and local knowledge representations with a special emphasis on the evolvability and localization of knowledge and the correct usage of these limits.
Marine water quality monitoring is performed for compliance with regulatory issues, trend detection, model validation and assessment of the effectiveness of adopted policies.
Groundwater quality observation data for individual monitoring points can be fitted to a linear or log linear regression model, where the significance of a trend can be determined by using the Mann-Kendall approach, which is widely used for trend detection in groundwater and surface water studies (Bouza-Deaño et al. 2008; Wahlin and Grimvall 2010).
Chandler, R. & Scott, M. Statistical Methods for Trend Detection and Analysis in the Environmental Sciences Wiley (2011).
Kundzewicz, Z. W. et al. Trend detection in river flow series: 1. Annu.
Kostas Tsioutsiouliklis is a Software Engineer in the Search & Relevance team at Twitter, working on trend detection.
The Mann-Kendall and Pettitt tests were used for trend detection.
It is possible to apply the same trend detection techniques within a more highly curated stream.
Without archives, analyzing only the most recent events can mislead an app's trend detection or recommendation services.
