Process – Structure Linkage for Cellulose NanoCyrstals (CNC) Presentation – 3 Sezen Yucel
Process Parameters: Acid concentration & Process time Dataset Process Parameters: Acid concentration & Process time 58 % 62 % 64 % 60 mins 120 mins 105 mins 45 mins 75 mins 105 mins C = 58, 62, 64 (%) T = 45, 60, 75, 105, 120 (min)
Image Analysis Rods as ellipses Majoraxis ~ Length Minoraxis ~ Width Histograms for length and width
Size Distributions (Length) Probability Density Distributions
Size Distributions (width) Probability Density Distributions
1st Approach Probability 2nd Approach Probability & data 2 Approach for PCA Example Data Set = {3, 5, 5, 6, 6, 6, 6, 7, 9,9} Histogram of the Data 1st Approach Probability Same range for each data 0 for no-data 1 2 3 4 5 6 7 8 9 10 0.1 0.2 0.4 Frequency Probability 2nd Approach Probability & data 1 2 3 4 5 6 7 8 9 10 0.1 0.2 0.4 0.3 2.4 0.7 1.8 0.48 0.16 0.39 0.11 0.29 Weighted Weighted/Sum
PCA results (1st approach – only probability C = 64% T = 45, 75, 105 (min) C = 62% T = 105 (min) C = 58% T = 60, 120 (min)
PCA results (1st approach – only probability) Basis Vectors for Length 1 2 3 4 5 6 PC1 -0.20 -0.24 -0.08 0.07 0.25 0.20 PC2 -0.04 -0.05 0.12 0.03 -0.01 PC3 0.06 0.004 0.001 -0.007
PCA results (2ND approach – probability & Data) C = 64% T = 45, 75, 105 (min) C = 62% T = 105 (min) C = 58% T = 60, 120 (min)
PCA results (2ND approach – probability & Data) Basis Vectors for Length 1 2 3 4 5 6 PC1 -0.19 -0.22 -0.08 0.05 0.26 0.19 PC2 -0.049 -0.06 0.135 0.028 -0.039 -0.016 PC3 -0.062 -0.059 -0.012 0.025 0.011 0.004
Desired model – Process structure linkage (Acid Hydrolysis) Structure (Particle Morphology) Concentration = 58, 62, 64 (%) Time = 45, 60, 75, 105, 120 (min) Inputs Process Parameters Outputs Size Distributions L_d W_d
First model - polynomial regression (1st order) f1 R Square = .85 f2 R Square = .14 f3 R Square = .57 Fitting polynomial equations for PC scores f1, f2, f3 MultiPolyRegress(X,Y,1) Where X = Y = ----------------------------------------------------------------------- PC1 = f1(C,T) PC2 = f2(C,T) PC3 = f3(C,T) 2nd order polynomial fitting Overfitting C T 58 60 120 62 105 64 45 75 PC1 PC2 PC3 -0.20 -0.037 0.057 -0.237 -0.054 -0.05 0.083 0.115 -0.006 0.067 0.026 0.004 0.255 0.043 0.001 0.198 -0.007
A new model for small number of data such as: Future work A new model for small number of data such as: Bayesian Linear Regression (BLR) Or Gaussian Process Regression (GPR) Hyperparameter optimization Validation of the new model (on the image which has different process parameters (C=62%, T=75 min) but less number of particles (~50)
Thank you & Questions