The three-year doctoral study career is coming to an end, and the doctoral thesis is the summary of the three-year study results, and the acknowledgment is the summary of the three-year experience. I gave it to the public.

? Xiongguan road is as iron as iron, and now it is still one step away from the beginning. . When the thesis is about to be engraved, looking back on my three-year doctoral career, many people have helped me. I should thank my tutor, researcher Kong Zhaojun. First of all, thank him for including me in the door wall. It is because of his acceptance that I have completed the transformation from a layman to a scientific explorer. Secondly, I want to thank him for trying his best to help me apply for public places when I entered school. It is precisely because of this pool that I have reduced a lot of financial pressure. During the whole three-year blog, I was in the mood to really sit down and do some learning. Finally, I thank him for taking the trouble to help me find a suitable job when I was looking for a job. The teacher's kindness is like a sea, which is hard to report. I was deeply impressed by Mr. Kong's profound academic attainments, rigorous academic style, serious scientific attitude, optimistic and cheerful personality and humorous talk. In particular, his profound knowledge and keen insight have provided key inspiration and help for the topic selection and writing of my thesis.

Thanks to Professor Gan Chuchu, Professor Han, Professor Xia Enjun, Associate Professor Feng Haiqi, Associate Professor and other teachers for their help in the process of writing my thesis.

Thanks to my brothers, Dr. Zhang Jihai, Dr. Li Lianhong, Dr. Peng and Dr., my classmates for three years, Bi Dede, Jing Lei and Pan Xuhua, my classmates during my master's degree, Dr. Shi Xinhe from Nanda, Dr. Hu from Renmin University, and Associate Professor from Zhejiang Sci-Tech University for their help in writing and revising my thesis. I would like to thank Professor Li Bo, Mr. Yu Chuanren and Mr. Dai from School of Management Economics of Beijing Institute of Technology, and my classmates Chu, Wang, Mi Chuanjun, Cai Feng, Xu Changjun, Deng Wei, Sun Mengyang, Wu Yang, Gui Jie and Pei for their help in my study and life. Thanks to my little brothers and sisters in the lab for sharing their youth and happiness with me. Thank you to all the students in the doctoral program of the School of Management and Economics of Beijing Institute of Technology in the fall of 2004 for accompanying me through this unforgettable journey!

Thank your family for their support and understanding over the past year!

Thanks to all the experts and scholars who reviewed my doctoral thesis in their busy schedules!

Special thanks to all those who supported me, helped me, criticized me, encouraged me and understood me!

Finally, I thank the years and difficulties for tempering me!

Please continue to read the relevant recommendation: graduation thesis fresh graduates apply for jobs.