Thank Dr. Ra guidance of my thesis, in his help, my papers have been completed successfully. Dr. Ra is 16 years in my career encountered in studying the best teacher. Dr. Ra First of all, the mathematical basis and for my ability, confirms my thesis topic and research objectives and methods, and let me know as soon as the relevant theoretical knowledge. Teachers in the model design, data modeling and thesis writing and revising process have given my careful guidance and help. Thank Dr. Ra on my tolerance, care and easygoing. My English speaking and listening are not very good, and teachers in exchange for each course, he always answered my questions patiently and the particular attention taken the trouble to use a pen to write it down. After reviewing my paper every time, always encouraging and tolerant attitude that the inadequacies of the paper, given a solution. Dr. Ra during the holidays, is still very concerned about the progress of my thesis. Thank Dr. Sa Ra teachers in travel time, also expressed concern about the progress of my thesis. Thank Dr. Ti, etc. I use the Matlab model simulation program to provide assistance. I thank Ms. Ma thesis grammar, wrong words, etc. changes. In addition, I am very grateful to Professor K gave me the opportunity to further study. My IELTS score of 6 points, and I present science in accounting, math is not very good, K, Professor still unconditional acceptance letter was sent to me. KK thanks the University of the year in the process of learning all the courses I teach teachers, especially Dr. PP, Dr, LL, in front of me over the course of the average scores of 70 points, a professor can not do without your heart. I am also very grateful to my parents and my brother to study in support. Finally, in the busy schedule to review this article to express my sincere thanks to you teacher