7 papers
Domain-Adapted Power Curve for Cross-Farm Applications
Ahmadreza Chokhachian, V. Roshan Joseph, Yu Ding
The wind energy industry relies on accurate power curve models to make power forecast, evaluate turbine performance, quantify upgrade, or support site-planning decisions. In this p…
Spatio-Temporal Gaussian Process for Building Terrain-Incorporating Wind Power Curves
Ahmadreza Chokhachian, V. Roshan Joseph, Yu Ding
Accurate modeling of wind turbine power curves is crucial for optimal wind farm operation. Nearly all existing power curve models focus on temporal variables such as wind speed and…
Factor Importance Ranking and Selection using Total Indices
Chaofan Huang, V. Roshan Joseph
Factor importance measures the impact of each feature on output prediction accuracy. Many existing works focus on the model-based importance, but an important feature in one learni…
Rational Kriging
V. Roshan Joseph
This article proposes a new kriging that has a rational form. It is shown that the generalized least squares estimate of the mean from rational kriging is much more well behaved th…
Discovering the Unknowns: A First Step
V. Roshan Joseph, William E. Lewis, Henry S. Yuchi +1
This article aims at discovering the unknown variables in the system through data analysis. The main idea is to use the time of data collection as a surrogate variable and try to i…
Enhancing Sample Quality through Minimum Energy Importance Weights
Chaofan Huang, V. Roshan Joseph
Importance sampling is a powerful tool for correcting the distributional mismatch in many statistical and machine learning problems, but in practice its performance is limited by t…