2009-04-15
老婆的西电考研复试
栏目：胡言乱语
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笔试篇
真正上来考场才知道复试笔试没有传说中的那么简单，数处从原来的五道大题增加为七道，五道证明，都是变换的性质，傅立叶变换，Z变换，离散傅立叶变换，这些还好，凭自己的理解都能证出来，一道线性卷积，一道FIR线性滤波器网络框图。数处一道DFT的证明帕斯瓦尔定理没有证出来，同学说倒着证，咋证呢？现在也没想出来。
数电模电一张卷子觉得题量还很大，还没考之前总四处打听会考什么知识点，结果是什么都考，很细的知识点都考虑。模电最后一道大题驰张振荡器俺没看，所以就空着了。今天面试时看到笔试的成绩了，85，还比较满意，呵呵。
面试篇
为了这个面试，仔细看了数字信号处理，看来微机原理、通信原理，赶了半个月的毕设，因为有人说老师必问毕设。
来了西电，见了老师带的研究生，感觉心里特放心了，也没有见导师，知道昨晚发现报我那导师的只有我一个外校的，其余都是本校的，五个还数成了六个，一下子急的觉都睡不着，只怕会保本校刷外校，刷谁呀，俺呗。
下午从两点就站在办公室外等着，19个人俺是第十五个，等啊等，等啊等，有点人进去了半个小时才被放出来，都说问的问题很难，还动笔算，画频谱图之类的，有些是通信原理的，比如平稳随机过程，宽平稳严平稳之类的，还有信号与系统的，问傅立叶变换，其实很多时候我们只是会用，深入讲讲本质的东西就不会来。每出来一个我们就围过去取经。五点半多，我刚从找了好几圈才找到的厕所回来，就被告知下个就是你，赶紧进去。就这么着，还没来得及紧张一脚就跨进去了。
敲门～进去
把四六级成绩单、报名信息简表、身份证学生证及复印件、成绩单、个人简历、复试表一股脑的给了复试秘书
老师:请坐吧
我:谢谢
秘书：唉呀，四六级成绩这么高，都五百多
老师：那就用中文自我介绍吧
我：……（信口讲了一堆）
中途被打断
组长给出了到题，一个矩形脉冲序列，画它的FT
我给讲了下我的思路，头头点了点头，“思路很清楚，就是这样的”
俺思路是懂，笔跟不上，知道是单个矩形脉冲和周期脉冲序列卷积，频谱是相乘，可到了频域硬是画成了卷积；头头说我知道你的意思啦，这式子写的也对，就是有点晕吧；
又给出了一道，把周期矩形脉冲改为只有三个矩形，画频谱
M:改为只有三个，相当于对原序列加矩形窗，时域相乘，那频域就是这两个的频谱卷积……
嘴上说的很对，理解也很正确，还是没画出来，我导师这会开口了：看来基本概念掌握的很清楚，很透彻，她一直在看我的成绩单，还惊讶的说“呀，高数竟然考了100”（嘿嘿，窃喜）
我左手边的老师没开口只是看我带的英语的那些证书，我纳闷哪个才是传说中留过洋的外语系的老师呢，左手边是复试作记录的秘书，我犯迷糊那会她还给我偷偷的提示呢，哈哈）
就问了俩问题，就把俺给放出来了，脑袋还蒙蒙的，兴奋，那会就觉得兴奋，哈哈
18，19号体检完了，算是真结束了
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