scholarly journals Towards Gaussian Bayesian Network Fusion

2015 ◽  
pp. 519-528
Author(s):  
Irene Córdoba-Sánchez ◽  
Concha Bielza ◽  
Pedro Larrañaga
Keyword(s):  
Bayesian Network ◽  
Gaussian Bayesian Network

VIRTUAL METROLOGY MODELING BASED ON GAUSSIAN BAYESIAN NETWORK

2018 ◽  
Author(s):  
Wei-Ting Yang ◽  
Jakey Blue ◽  
Agnes Roussy ◽  
Marco S. Reis ◽  
Jacques Pinaton
Keyword(s):  
Bayesian Network ◽  
Virtual Metrology ◽  
Gaussian Bayesian Network

scholarly journals Seasonal forecasting of lake water quality and algal bloom risk using a continuous Gaussian Bayesian network

2022 ◽  
Author(s):  
Leah Jackson-Blake ◽  
François Clayer ◽  
Sigrid Haande ◽  
James Sample ◽  
Jannicke Moe
Keyword(s):  
Water Quality ◽  
Bayesian Network ◽  
Lake Water ◽  
Regression Tree ◽  
Predictive Performance ◽  
Lake Water Quality ◽  
Water Quality Prediction ◽  
Chl A ◽  
First Choice ◽  
Gaussian Bayesian Network

Abstract. Freshwater management is challenging, and advance warning that poor water quality was likely, a season ahead, could allow for preventative measures to be put in place. To this end, we developed a Bayesian network (BN) for seasonal lake water quality prediction. BNs have become popular in recent years, but the vast majority are discrete. Here we developed a Gaussian Bayesian network (GBN), a simple class of continuous BN. The aim was to forecast, in spring, total phosphorus (TP), chlorophyll-a (chl-a), cyanobacteria biovolume and water colour for the coming growing season (May–October) in lake Vansjø in southeast Norway. To develop the model, we first identified controls on inter-annual variability in water quality using correlations, scatterplots, regression tree based feature importance analysis and process knowledge. Key predictors identified were lake conditions the previous summer, a TP control on algal variables, a colour-cyanobacteria relationship, and weaker relationships between precipitation and colour and between wind and chl-a. These variables were then included in the GBN and conditional probability densities were fitted using observations (≤ 39 years). GBN predictions had R2 values of 0.37 (cyanobacteria) to 0.75 (colour) and classification errors of 32 % (TP) to 13 % (cyanobacteria). For all but lake colour, including weather nodes did not improve predictive performance (assessed through cross validation). Overall, we found the GBN approach to be well-suited to seasonal water quality forecasting. It was straightforward to produce probabilistic predictions, including the probability of exceeding management-relevant thresholds. The GBN could be purely parameterised using observed data, despite the small dataset. This wasn’t possible using a discrete BN, highlighting a particular advantage of using GBNs when sample sizes are small. Although low interannual variability and high temporal autocorrelation in the study lake meant the GBN performed similarly to a seasonal naïve forecast, we believe the forecasting approach presented could be useful in areas with higher sensitivity to catchment nutrient delivery and seasonal climate, and for forecasting at shorter time scales (e.g. daily to monthly). Despite the parametric constraints of GBNs, their simplicity, together with the relative accessibility of BN software with GBN handling, means they are a good first choice for BN development, particularly when datasets for model training are small.

scholarly journals Maize Carotenoid Gene Locus Mining Based on Conditional Gaussian Bayesian Network

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 15223-15231
Author(s):  
Jianxiao Liu ◽  
Yu Kang ◽  
Kai Liu ◽  
Xuan Yang ◽  
Menghai Sun ◽  
...  
Keyword(s):  
Bayesian Network ◽  
Gene Locus ◽  
Gaussian Bayesian Network
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