Dear Sir or Madam: The
purpose of this letter is to recommend Mr. Yi, a worthy candidate
for admission to your graduate program. Mr.
Yi have ever took my course "Introduction to Control". I
was deeply impressed with him not only the good score "A"
he got in the class but also thehighly active and devout attitude
he learn Control Theory. Sometimes, he came to my office to ask me
some interesting questions about the Control and System theories not
mentioned in the autobiology of my class and to discuss the development
and application of control theory in Science and Industry with me.
He imagined this theory is truly an amazing subject. If people understand
and use it very well, this world will get better. "Well!"
I thought, " This young man is really like Control." Then
he took part in my research "Design of Sinusoidal Oscillators
Using the Theory of Variable Structure Systems" (published in
the Int. J. of Electronics, 1992, Vol. 72, No. 1) to design the oscillator
circuits. From simulating the circuits he designed with PSPICE to
assembling the electronic elements. he shown me the enthusiam and
hardily spirit in his work.When gettinga new idea or finding some
questions,he always shared his opinion about how to overcome the error
or improve the experiment results to me.After try-and-error and ameliorating
the circuit many times, we finally got a refined but good-performance
oscillator. Mr. Yi also got
admirable grades in a couple of courses of control and systems, I
truly believe he has strong learning capability and enthusism in this
field. So I no doubt that he will become a good student in your esteemed
department. Should you need any further information about Mr. Yi,
please do nothesitate to contact me. Sincerely
Yours
XXX
来源：英文锁定 |