Abstract:This thesis involves extensive collaborations and a lot of helps from so many respectable people. It gives me an opportunity to show my gratitude to all people who had done contributions to this thesis. First and foremost, I would like to express my deep gratitude to my research supervisor, Dr. Sun ChangQing. He gave me an opportunity to continue my high degree pursuing in such interesting research field. With his encouragement, guidance and invaluable suggestion, I immersed into the project gradually. His und… Show more
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