前两天阅读文献，随手发现一个论文致谢比较长的（4页英文），转载于博客。没想到那么高的阅读点击量和推荐（看来又到毕业季啦），并有以曹聪老师为代表的至少三位评论人说自己的论文致谢要超过4页。刚刚就看到尚同学的长达6-7?页的激扬文字，可谓文笔飞扬，非常精彩。殷殷深情，可昭日月。 http://blog.sciencenet.cn/blog-293055-696319.html

其实一直以来，也常看到科网上非常有文采的致谢。尤其是那种采用文言文书写，彰显文笔优美，不失为一种传统文化休养的良好表现。但是，我觉得文笔为次，感情为上。每一个学位的“认真”获取都不是一件轻而易举的事，伴随着学术上的成长的是生活上感情上挫折崎岖也好，平坦顺利也罢，但是这一切都不可复制，不可重来。更何况又都发生在那些个【终将逝去的青春】？你要说没感情，我大抵是不信的。知识阶层宝贵的就是精神财富和那份理想主义。

我想谈一谈博士论文的后记，我相信所有的人在写博士论文的时候都费心费力，如何表达这些辛苦，如何对帮助过自己的人表达一个谢意，也许只有博士的致谢或后记可以作为一个非科技文体的地方才能完全表达，而如何利用好这个后记就成了所有的博士需要好好考虑的重要的事情了！真情实感的写出自己的这么多年的辛苦，真诚的向所有帮助过自己的人致以谢意也是我们必须做好的！

－－－－－ 尚书勇给我的留言

传统中国文化不善于直抒胸意，甚至不善于对亲近的人表达敬意和爱意。比如我们对于父母很少说爱，虽然我们可能更多表示在行动上。但是表达出来又有何不可呐？若是求学路上遇到良师益友，感情固然值得回忆和缅怀，但也值得写下来和表达出来。我觉得这是人很自然的本性，懂得感恩。

－－－－－ 我给尚同学的回复

在今天这个特殊的日子里，我们能不能以对过往的良师益友亲爱家人的感谢作为一个怀念，来一份我们读书人独有的大PARTY？也许他们就在你的身边，也许他们已经远去，但是我相信在你的心底，他们一直都没有走远！

感谢毕业路上有他们

青春可以走，但是爱，请留下！

带个头，上上俺还没有最终定稿的致谢。也希望坐在电脑前的你，再一次被曾经的爱滋润，巴拉巴拉亮出来。

note:年代不限，语言不限，格式不限，长短不限，学位也不限，只要保证真实。

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ACKNOWLEDGEMENTS

Firstly, my sincere gratitude goesto my supervisor, ProfessorTariq P. Sattar. When I first met him, I was clearly not well preparedfrom any aspect and was so weak that I could not even speak understandable English.It must be a terrible moment to him as the same as to me since I repeated every singlesentence/word twice but still massed up them. After our meeting in his office,my brain was exhausted. From then, whenever my parents and friends asked meabout my supervisor, I often replied to them with

He can eat your brain

A beard well lathered is halfshaved. Prof. Sattar is so patient and gentle that he starts educating me byteaching me the language. We start from the beginning and graduallywe are on the right road. On this road, he always served as a great sourceof enthusiasm and encouragement and gave tremendous trust, freedom and supportto my research. His excellent supervision, consistent support, and fatherly patiencethroughout my postgraduate education have been invaluable. Through the threeyearsat theCentre for Automated and Robotics NDT directed by him, we have many prettymemorable and wonderfulmoments that will never decrease over time. Itruly believe that our supervisor-student relationship and collaborationwill continue.

I would also like to sincerelyexpress my gratitude to Dr. Zhanfang Zhao who is my second supervisor andProfessor Shudong Sun who is my supervisor with the School of Mechatronics,Northwestern Polytechnical University (NPU) in China with which I am anon-leaving PhD candidate. Both of them provide supports and assistance to Prof. Sattarto my research in London south bank university (LSBU). After I leavefrom LSBU, I will join the team of Prof. Sun with NPU. My research programmewas carried out in collaboration with NPU.

Sincere thanks to my colleagues, friends and brothersMohammed Abdullah Al Rashed, Ousmane Abdoulaye Oumar, Tejas Kaushik Patel, SalmanHussain and Mohammed Hossain. It has been a wonderful experience towork, play, andlive with such passionate, stimulating and friendly people. Thedays we cook in the lab (this is clearly against the rule of the lab!), playcricket (they are my teacher at this part) and look around in the university tofind something that can be useful to us are never far! I also value support from all of thestaff at the Robotics Centre and the faculty as well as the Central Research Support.I am very grateful to all the work they have done to support myresearch. Thanks to the security staffs as well who gave me warm smiles everylater night and weekend when I worked Out Of Hours in the lab.

Sincere thanks to Professor Yu-Chi(Larry) Ho from Harvard University USA for advising me how to do research and encouragingme on several academic topics involved with nonlinear filtering. Thanks to Dr.Miodrag Bolić with the Ottawa University, Canada and Prof. Petar Djurić with theStony Brook university, USA for their collaboration and academic discussion. There are also many otherworldwide peers who provided help to me and who deserve my gratitude. We all work in similarfields to serve for a more bright and intelligent society. In my personalconversation with Professor Ho, he said to me

Filtering is a very mature field.

It is my personal opinion that wehave reached the point of diminishing return to further spent effort in thisfield.  My recommendation is that youfollow my golden rule on how to do research and find useful research problemswith payoff

The biggest thanks go to my parents(Fujun Li and Qiaoyun Zhao), my brother (Gangdong Li), my sisters (Guiju Li andGuifen Li) and my wife-to-beMiss Qian Jia for always supporting me. Lovegoes to my nephews (Pei Li and Ze Li) and nieces (Tiantian Huang and JingjingLiu). Without them and their love, this work would not have been possible.

Last but not least, I wish toacknowledge China Scholarship Council for supporting me to study in UnitedKingdom and the faculty of Engineering, Science, Built and Environments, LSBUfor providing me the faculty scholarship and research fund. Without this financialsupport, this work could also not be possible.

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