A Hybrid Method to Solve Data Sparsity in Travel Recommendation Agents Using Fuzzy Logic Approach

Table 1

List of acronyms in alphabetical order.

Acronym	Term
AIC	Akaike information criterion
ANFIS	Adaptive neurofuzzy inference system
ANN	Artificial neural network
BPR	Bayesian personalized ranking
CF	Collaborative filtering
EM	Expectation-maximization
FN	Fuzzy number
FIS	Fuzzy inference system
GMM	Gaussian mixture model
HOSVD	Higher-order singular value decomposition
SVD	Singular value decomposition
KNN	K-nearest neighbor
MAE	Mean absolute error
MC-CF	Multicriteria collaborative filtering
MF-BPR	Multifeedback Bayesian personalized ranking
MFs	Membership functions
MRMF	Multirelational matrix factorization
NN	Nearest neighbor
PCA	Principle component analysis
R2	Coefficient of determination
RMSE	Root mean squared error
RS	Recommender system
TRSs	Travel recommender systems