Lithium niobate is most well-known of optical material and could be characterised using stochastic spline regression. The aimed of this research is to find the best spline regression based on percentage of transmittance of lithium niobate and wavelength at three concentrations of ruthenium oxide (0%, 2%, and 4%) and to learn the behaviour of transmittance of lithium niobate if wavelength of visible light change with spline regression. The results show that spline quadratic regression with three knots are the best model for all concentration of ruthenium oxide, since the model can follow actual data accurately with R² more than 90%.

中文翻译：

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可见光波长影响铌酸锂透过率的最佳随机模型

铌酸锂是最著名的光学材料，可以使用随机样条回归来表征。本研究的目的是根据三种浓度的氧化钌（0％，2％和4％）下铌酸锂的透射率百分比和波长找到最佳样条回归，并了解铌酸锂的透射率行为。可见光的波长随样条回归而变化。结果表明，对于所有浓度的氧化钌，三个结的样条二次回归是最好的模型，因为该模型可以准确地遵循R ²大于90％的实际数据。