I plan to begin my Ph. D. Degree study in your Biophysics program in
            the fall term of 1995 and wish to obtain the degree within five
            years or so . (来源：EnglishCN英语问答中心[e问e答])

            Biophysics develops fast with the fruits of modern physics and
            chemistry. There is a wide range of fascinating questions in
            understanding life systems. During these years' study at Tsinghua
            University, I constantly tried to improve myself through independent
            reading. This kept me well informed of the latest development in
            Biophysics which attracts me a lot.

            E. Schrodinger's famous work 'What is Life' let me think a lot of
            questions in Biophysics. Up to now, physicist have made great
            success in studying simple periodic crystals, but for the complex
            biological structures possess both aperiodicity and order such as
            DNA, there still exist many challenges. Why these aperiodic matter
            can control the life strictly and precisely? Why a small amount of
            nature catalyst-enzyme can be far more efficient than plenty of
            man-made catalysts? Is the growth of life determined by genetic
            materials or by self-assembly or by both of them? From the book
            'Liquid Crystals and Biological Structures' written by Glenn H.Brown
            and Jerome J.Wolken, I got deeper understanding of biological
            structures which possess both mobility and long-range structure
            order, respond to a variety of external stimuli just like the
            properties of liquid crystals. The striking architecture at the
            molecular level shows there is a common physical-chemical origin for
            all life systems. The oriented molecules in liquid crystals furnish
            an ideal medium for catalytic action, particularly of the complex
            type needed to account for growth and reproduction. Water,
            especially the weak hydrogen bond plays critical role in all
            organism. It determines the protein folding, stabilizes the double
            helix structure of DNA. If we substitute deuterium for hydrogen, the
            biological system may be destroyed.

            Many physical and mathematical approaches can be applied to biology
            such as the quantum mechanics, non-equilibrium thermodynamics,
            information theory. But a basic difficult by using the
            non-equilibrium thermodynamics in biology is the spatial
            heterogeneity in biological systems and the feedback existing in all
            kinds of reactions and processes. Condensed Matter Physics also
            concerns closely with Biophysics. The theory of phase transitions
            and critical phenomena can be used to explain problems such as how
            the temperature of the phase transition of lipids from the solid
            state to the liquid crystalline depends on the fatty acid
            composition.

            On the other hand, researches in biophysics also push forward the
            development of physics, lead to more applications in bionics such as
            AI and neural network

            Now I am doing my Diploma Thesis at the Institute of Physics,
            Chinese Academy of Science. My Topic is about investigating coherent
            backscattering in a random scattering medium by the He-New laser.
            Light in certain dielectric microstructures exhibits localized
            modes, similar to the localized wave function of electrons in
            disordered solids-Anderson Localization. The propagation of light in
            a scattering medium can be described as random walk of photons with
            the direction of each succeeding step determined by the laws of
            probability. The Topic spans the disciplines of Condensed Matter
            Physics and Quantum Opties. I have absorbed a lot of relative
            knowledge such as random walk, peroration models stochastic process
            to prepare for my project .I think the method I dynamics of chemical
            reactions.

            Since my background focused on physics, mathematics, electronics,
            lasers and optics, I have taught myself some beginning biology and
            chemistry courses this year, discussed them with teacher sin the
            Dept of Biological Science and Technology at Tsinghua University I
            would also like to take more basic courses in this field under your
            guidance to make up my deficiency. From college guides I learned
            with pleasure that you had strong faculty with a variety of
            background in physics, chemistry, mathematics and electrical
            engineering. It is often in the multi-disciplinary research that
            came the most exciting discovery. Your group also provides
            outstanding opportunities for close interaction between graduate
            students and faculty. That is why I deem your program as my best
            choice. Besides, I want to link modern biophysics with Chinese
            Medicine to get comprehensive understanding of life.