1. Full name: Pham Dinh Phong                                             2. Sex: male

3. Date of birth: 04/09/1976                                                     4. Place of  birth: Ha Noi

5. Admission decision number: 1118/QĐ-CTSV, dated 24/12/2012 of the Rector of the University of Engineering and Technology

6. Changes in academic process: Decision No. 957/QĐ-ĐT, dated 27/11/2015 of the Rector of the University of Engineering and Technology on extending the study period of the PhD. student.

7. Official thesis title: Develop some classifier design methods based on fuzzy set theory and hedge algebras

8. Major: Computer Science                                                         9. Code: 60 48 01 01

10. Supervisors: 1. Prof., Dr. Nguyen Thanh Thuy

                            2. Asso. Prof., Dr. Sc. Nguyen Cat Ho

11. Summary of the new findings of the thesis:

Contribute to propose an enlarged hedge algebras for modeling the semantics core of terms in order to provide a mathematical formalism for developing methodologies to design automatically the fuzzy set based semantics with interval-cores, e.g. trapezoidal fuzzy sets, to represent linguistic frames of cognition.

Applications of the semantics core and the trapezoidal fuzzy set based semantics of the linguistic frames of cognition to the optimal design problem of the interpretable fuzzy linguistic rule based classifiers. The experimental results of the proposed methods are evaluated and compared to the state-of-the-art published results.

Research on the quality effects of the fuzzy linguistic rule based classifier design methods with the computational semantics of linguistic terms determined by the hedge algebras and propose the quality improvements using soft computing techniques.

12. Practical applicability, if any:

The research results can be applied to solve the current hot issues of the classification problems and can be applied to solve the other current hot problems such as the fuzzy control, pattern recognition, etc.

13. Further research directions, if any:

Research on the fuzziness parameter optimization and the optimal fuzzy rule set selection based on the coevolutionary methods. Research on the fuzzy reasoning method for the fuzzy rule based classifiers using hedge algebras. Apply hedge algebras to solve the classification problems with missing data, imbalanced data.

14. Thesis-related publications:

- Nguyen Cat Ho, Tran Thai Son, Pham Dinh Phong (2012), “Interval quantifying mapping of hedge algebras with adding special hedge”, Journal of Computer Science and Cybernetics 28 (4), pp. 346 – 358.

- Phong Pham Dinh, Ho Nguyen Cat, Thuy Nguyen Thanh (2013), “Multi-objective Particle Swarm Optimization Algorithm and its Application to the Fuzzy Rule Based Classifier Design Problem with the Order Based Semantics of Linguistic Terms”, In proceeding of The 10th IEEE RIVF International Conference on Computing and Communication Technologies (RIVF-2013), Hanoi, Vietnam, pp. 12 – 17.

- Pham Dinh Phong, Nguyen Cat Ho, Nguyen Thanh Thuy (2013), “Study the granularity design methods of triangle fuzzy-set-based semantics of linguistic terms for the classification problem”, Proceedings of the 6th National Conference on Fundamental and Applied Information technology Reseach, Hue, pp. 385 – 393.

- Pham Đinh Phong, Nguyen Cat Ho, Tran Thai Son, Nguyen Thanh Thuy (2013), “A fuzzy classifier design method based on the extended hedge algebras quantification”, Journal of Computer Science and Cybernetics 29 (4), tr. 325 – 337.

- Cat Ho Nguyen, Thai Son Tran, Dinh Phong Pham (2014), “Modeling of a semantics core of linguistic terms based on an extension of hedge algebra semantics and its application”, Knowledge-Based Systems 67, pp. 244 – 262 (SCI indexed).

- Phong Pham Dinh, Thuy Nguyen Thanh, Thanh Tran Xuan (2014), “A Hybrid Multi-objective PSO-SA Algorithm for the Fuzzy Rule Based Classifier Design Problem with the Order Based Semantics of Linguistic Terms”, VNU Journal of Science: Computer Science and Communication Engineering 30 (4), pp. 44–56.

- Pham Dinh Phong (2015), “An application of feature selection for the fuzzy rule based classifier design with the order based semantics of linguistic terms for high-dimensional datasets”, Journal of Computer Science and Cybernetics 31 (2), pp. 171 – 184.

- Pham Dinh Phong (2015), An application of feature selection for the fuzzy rule based classifier design based on an enlarged hedge algebras for high-dimensional datasets, Journal of Science and Technology 53 (5), pp. 583–597.