科大的那篇牛PS

加菲熊UID: 103463

发信人: blacksoil (nature explorer), 信区: AdvancedEdu
标  题: 我的PS
发信站: 瀚海星云 (2003年11月02日09:08:04 星期天), 站内信件

不能妄称“一篇成功申请XXX牛校的PS”，只是希望这篇PS能起到一个借鉴的作用，在整

体结构、行文思路、材料筛选方面。因为许多同学在最初写PS的时候都会犯相似的错误
，如喜欢把一些自认为很了不起（比如作家教啦、当班上的生活委员啦）这类事情花大
量笔墨来写，而把真正重要的东西省略了。

这篇文章可以与我的前面一篇《写PS的几点个人体会》结合起来看。

再次提请注意，这篇PS并不就是“适合每个人的PS”，每个人的经历不同、申请的专业
不同，因此写出的好的PS应该是有各种风格的。本文仅在于对大家刚动笔写PS时起一个
参考作用。
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Statement of Purpose

I am writing to apply for graduate study in the Department of Mechanical  
Engineering at UC-Berkeley. My intense interest is in heat transfer related  
to the emerging areas of MEMS and materials processing, as well as fluid  
mechanics and combustion. I want to become a world-class researcher in  
these areas.

A top student from the University of Science and Technology of China  
(USTC), which is one of the most prestigious universities in China, I am  
proud of my very strong background in my chosen field and great potential  
for study and research, which are both key factors to a successful graduate  
study as well as a successful research career.

The best proof of my potential for study is the fast rise of my academic  
rank in my first year in USTC. The first semester in USTC was a depression  
period for me and I did poorly in most subjects. However, after finding out  
the problems with my study as well as personal affairs, I spent the second  
semester in diligent and highly effective study, and my rank in the class  
soared from the second half of the class to No. 2, this became a story in  
my class at the time. Since then, I have always kept being one of the top  
students. My excellent performance in study brought me many awards and my  
overall rank of the four years is No.3 out of 67 students.

During the study, I always try to make in-depth exploration of regular  
courses, rather than just earn A’s or B’s in the final exams. For  
example, in Numerical Heat Transfer, we were required to compare several  
schemes through solving a transient two-dimensional heat conduction  
problem. Through careful programming and many numerical tests, I made new  
observations concerning the effects of relaxation factors and a phenomenon  
which I named as “false convergence”. In addition to regular schemes, I  
also employed the Low-Storage Runge-Kutta schemes proposed by  
J.H.Williamson, hoping to improve the accuracy of temporal discretization.  
However, they showed no superiority to other schemes. After carefully  
analyzing the results, I came to realize that the inherent discontinuity of  
boundary conditions in this problem limited the accuracy, and a specific  
scheme has its specific range of application.

In addition to regular studies, I have been involved in research projects  
at an early stage of my undergraduate study. These research projects  
spanned such diverse subjects as energy conversion, heat transfer, and  
fluid mechanics.  

My early research was mainly related to energy systems. As a sophomore, I  
assisted Dr. Guoquan Qiu in the construction of a kind of novel solar  
energy collector, and I experimented with it. This first involvement in  
research gave me preliminary knowledge about “what engineering really is”.  

Later, in Dr. Hong Ye’s lab, I took part in the design of a heat pump  
system which had promising applications in food industry to efficiently  
desiccate vegetables. I did a large portion of the work in design,  
construction, experimentation, system analysis and improvement. And the  
final results were very good.

Later, my interest shifted to biomedical engineering, whose  
interdisciplinary nature attracted me very much. I joined in Professor  
Shuxia Cheng’s group, whose research focused on the preservation of cells  
and tissues, measurements of physical properties of organisms, and other  
research projects directed at immediate medical applications. I attended  
the group meetings frequently, and offered my ideas toward many problems.  
Later, I was assigned the task to calculate the fluid flow and mass  
transfer in a dialyses system. This was the first project on which I worked  
independently. It required dealing with two coupling boundary conditions in  
calculation. I devised a SIMPLE-like method and successfully overcame the  
difficulties. My work was finally summarized in a technical report and  
became a part of the Ph.D. thesis of a member in the lab. It should be  
mentioned that this work was completed when I haven’t finished the courses  
of Numerical Heat Transfer and Viscous Fluid Mechanics. And now, with added  
knowledge in these fields, I have renewed interest in biomedical  
engineering.

Experiences in Professor Cheng’s group made me well aware of the  
importance of fluid mechanics in engineering systems, so later I devoted  
great efforts to that field. Through extensive reading, I have kept abreast  
with the latest developments in fluid mechanics such as Lattice-Boltzmann  
Methods, ENO & WENO schemes, high-order compact schemes, etc. Currently, I  
am attending graduate courses in Advanced Fluid Dynamics and Applied  
Mathematics, participating in Professor Yiliang Chen’s seminar on PDF  
methods, and attending an elective on fluid flows in MEMS. I believe a  
sound understanding of fluid mechanics can greatly benefit the research of  
other disciplines such as heat transfer.

My interest in microscale heat transfer came from Professors Bu-Xuan Wang  
and Xiao-Feng Peng’s work in boiling heat transfer in microchannels. Their  
description of boiling systems using statistical methods really fascinated  
me. Professor Chang-Lin Tien’s seminal work in the basic mechanism of  
microscale heat transfer further motivated me to go into this field. This  
field is full of exciting opportunities and challenges, and is constantly  
drawing ideas from physics, materials science, electrical and mechanical  
engineering. A sound understanding of transport phenomena in micro scales  
can greatly push forward the progress of heat transfer as well as related  
engineering applications.

Therefore, I choose Berkeley, the Mecca of heat transfer researchers in the  
world, to further my studies and research. With my broad background, solid  
foundations, and above all, keen interest in this field, I am confident  
that I can succeed in my graduate studies.

After obtaining the Ph.D. degree, I will come back to China and continue my  
research in this area. I believe that coming into this prosperous field  
will be one of the most significant decisions in my life and a graduate  
experience in Berkeley will greatly benefit both my own career and my  
country.

  
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※ 来源:·瀚海星云 bbs.ustc.edu.cn·

auteurUID: 139302

就一个字：强！

wingshockerUID: 88089

so long a PS...

given79UID: 121937

比较有水平!!

kmokUID: 46976

写的是好，感觉就是长了点

netshiziUID: 132752

是不是太长了？

sdramUID: 113664

看起来长，其实才九百七十字

fenzai04UID: 26944

very good

hen 流畅

stella152UID: 123977

perfect