When this thesis is completed, i would like to give my sincere gratitude to all the teachers and students who give me a lot of great help.
Firstly, I am sincerely appreciate my supervisor Prof. Shi Falin. Thanks for his warm care and careful guidance. During the writing process,he helps me a lot. From the thesis proposal,architecture of the paper to the finally paper,he give me a ardent guidance. And he puts forward many valuable advices no matter the topic selection and conception of thesis,or the research methods. He gives me a lot of careful and meticulous edification and generous help. Especially his wide range of knowledge,rigorous attitude toward research and strict working style make me learn a lot. Without his help,there would not have been this thesis presented.
Secondly, i would give my sincere gratitude to all my good friends for they offer me a large number of materials and suggestions. They also.supervise me and spend their free time to help me revise my paper and point out my inadequacies and they also offer me their suggestions and amendments. Without their positive and unselfish help,i can not finish my paper in time.
Finally, i would like to thanks my teachers and students again for their great help.
When this thesis is completed, i would like to give my sincere gratitude to all the teachers and students who give me a lot of great help.
Firstly, I am sincerely appreciate my supervisor Prof. Shi Falin. Thanks for his warm care and careful guidance. During the writing process,he helps me a lot. From the thesis proposal,architecture of the paper to the finally paper,he give me a ardent guidance. And he puts forward many valuable advices no matter the topic selection and conception of thesis,or the research methods. He gives me a lot of careful and meticulous edification and generous help. Especially his wide range of knowledge,rigorous attitude toward research and strict working style make me learn a lot. Without his help,there would not have been this thesis presented.
Secondly, i would give my sincere gratitude to all my good friends for they offer me a large number of materials and suggestions. They also.supervise me and spend their free time to help me revise my paper and point out my inadequacies and they also offer me their suggestions and amendments. Without their positive and unselfish help,i can not finish my paper in time.
Finally, i would like to thanks my teachers and students again for their great help.