电子电气工程个人陈述七.

　　申请专业：电子电气工程EE

　　Brought up in a pure environment surrounded by mountains and woods. I deem myself as a lucky person born with natural gifts Some of them are "ordinary", showed obviously on math, music and memory at a quite early age and continued to serve as parts of my distinctiveness as I grew up some of them are "extraordinary ", for example, my original interest in philosophy. It is hard to believe to some that what I have speculated about at the age of five coincided with some of the thoughts in Jean-Paul Sartre&aposs "L&aposEtre at le Neant".

　　Why electronics?

　　It still remains a mystery to me how I lt childhood dream of become an astronomer and chose electronic engineering as my college major instead. Not knowing much about circuits as about stars at that time. I seemed to be simply allured by the idea of designing a guidance system for the space shuttle. Five years of inquiry into the electronic world proved that my choice was right. I was completely infatuated with such a field-so profound and vigorous that one is only limited by his/her imagination.

　　What&aposs done?

　　Anxious to find out what "electronics" really means. I began doing laboratory research as early as from the third year. First at the Microwave Lab, doing circuits simulation and user interface design. Generally speaking. Works during that period were fragmentary , but they have given me sufficient experience on C. C++, Windows programming and interface design, which laid a sold foundation for my future study.

　　Later, to explore something new, I applied to join the Multimedia Lab, an "interactive "place sponsored by Prof Xing Li, I became familiar with UNIX system and did X Windows interface design for some time Probably because some interesting points in my design, I was offered an opportunity by Prof Li to join the "wavelet research group". Intending to develop wavelet applications .

　　That was a turning point in my work. Wavelet is a brand-new area with modern mathematical background, free space of imagination and, a little but philosophical color that totally interested me I carried out a experiment of applying Embedded. Zero tree Wavelet (EZW) algorithm to speech coding EZW algorithm was originally developed in image coding, aiming at the multi-resolution transmission of pictures. Its ficiency greatly depends on the amount of zerotrees the source produced . By properly quantized, speech samples can be expected to generate a considerable number of zerotrees due to its spectrum characteristics . In my experiment, different kinds of speech sources have been tested and an average compression ratio of 8 I was achieved, with no perceptible distortions Compared with previous coding methods, the result is encouraging, for the benits are gained through a rather concise procedure doing encoding and decoding is as schematically as doing a cross -word puzzle Moreover. What I have done is actually superficial. There still exist at least several means to improve it, for example, the application of non-even quantizer, wavelet packet, the dinition of a higher dimensional structure like "zeroforest ". the selection of an appropriate wavelet base, etc.. The improvement of the algorithm is included in my present research.

　　What&aposs on going

　　I am now working on my diploma thesis. The topic is "A Research of Multi-resolution Coding of information and Relevant Transmission Protocols", including multi-resolution coding of images. Wavelet coding of audio signals (improved EZW algorithm), and an integrated demo system.

　　Special interest

　　More than enjoying the coding game, another fascinating point I found in speech or image processing is the combination of signal theory with neuropsycology and cognitive science. It was discovered as I was studying the auditory model. When a series of complex physiological functions are modeled and mathematically abstracted ,we found out that the cochlea is actually a living wavelet filter, while lumps of cells working infatiguedly for the Fourier Transform--the way the hearing cortex to grasp a sound Some interesting things can be also found in our visual system The contour and texture based image coding is one of the inspirations given by our own eyes, and is just one of the numerous that waiting for us to discover When we are puzzled by piles of questions such as sound and vision, perception and cognition, why don&apost we go to the Creator and ask how he has handled them?

　　What to pursue?

　　Concluded form above, my research experiences concentrate on speech and image processing, with an emphasis on coding schemes and a special interest on the application of knowledge in biological and cognitive science. What I am going to do is to develop my interest on speech or image processing, prerably with an interdisciplinary approach. Because of the rapid advances and the active environment of such a field in the United States. I am sure that an institution with a world reputation on electrical engineering like yours is my first choice. However ,due to my broad interest in electronics and other branches of learning, there is always no limitations on specific programs.

　　Still further

　　Upon receiving a doctoral degree in the States, I will go back to my mother country, not only for the beloved land and people, but also for the temptation of eastern philosophy. The idea hit upon me when I caught sight of the graphic of wavelet decomposition that is surprisingly similar to the ancient Taoist interpretation of the generation of universe . It has been widely accepted that eastern thought would play an important role in future science and I believe the instillation of modern western ideas could accelerate the process. As the descendant of the Orient. I am willing to make some usul attempts.