美国留学材料中推荐信的作用也是值得大家注意的，在美国研究生申请中不同的专业应该准备不一样的美国研究生申请推荐信，下面就来看看美国大学控制系统专业推荐信范例，以供大家参考。

　　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 the highly 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 enthusiasm and hardily spirit in his work. When getting a 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 rined 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 enthusiasm 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 not hesitate to contact me.

　　Sincerely Yours

　　XXX

　　通过以上对美国研究生申请中控制系统专业推荐信范例分享，很多准备美国留学材料的人可以参考以上的美国大学控制系统专业推荐信范例。

　　澳际提示：

　　1.美国研究生申请推荐信 化学专业范例

　　2.申请美国大学奖学金的推荐信怎么写

　　3.美国留学材料 工程专业推荐信范例

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