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自適應信號處理論文:基于matlab的自適應濾波算法研究-免費閱讀

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【正文】 and I hope modern readers will sympathize with the pedestrians plagued by prams, and infuriated by the postal service, even if our forebears had slightly higher standards.‖(Lee Jackson, 2020: 12) It must make a help to study the London of Victorian Era. By the way, the website ―Wikipedia‖ provides the related information, too. The domestic scholars‘ studies in this field are meritorious. Li Zeng and his partner Long Ruicui study the classes system in Victorian Era in their The Shift of Dominative Moral Trend in Victorian Britain. They point out that ―… the people essentially establish their moral trends with their real social estate in the class system…‖ (Li Zeng and Long Ruicui, 2020: 190) This thesis provides some references to the social class system in Victorian Era. Liu Xiaohan‘s study, The colonialism London in Holmes’s Eyes which is published in ANHUIWENXUE, presents the side of colonialism in London of Victorian Era. ―Industrialization, Urbanization and Colonialism 寧波大學科學技術學院本科畢業(yè)設計(論文) 10 change the original structure of London, and the cultures which e from colonies, as same as drugs, are injected into the heart of the developed empire.‖(Liu Xiaohan, 2020: 22) It is worth mentioning, she realizes the side of hero from Sherlock Holmes in this study. ―… Holmes represents the scientific and rational. He tries his best to dislodge all the colonialism poisons which are invading his mind and recovers the original British cultures and orders.‖(Liu Xiaohan, 2020: 22) Wang Ting‘s Complete Sherlock Holmes: the Panorama Gram of Victorian Era studies various aspects in Victorian Era with the descriptions in Conan Doyle‘s tales of Sherlock Holmes. ―The popularity of Complete Sherlock Holmes is not only for its attractive stories, but also for its making readers understand a real London, a real Victorian Era.‖(Wang Ting, 2020: 104) Wang Ting analyzes the economy, science, culture, social classes and the minds of the public. What is more, Wang Ting realizes the change of women‘s power in this work. ―The women widely expend their views and realize the importance to strive the rights for themselves. The Feminist Consciousness is awakening.‖(Wang Ting, 2020: 106) The points in the thesis are useful in this study, providing the detailed date of Victorian Era. Feng Xinhua holds that the word ―gentleman‖ originates in Victorian Era. Yu Xiaoqun points the Sherlock Holmes‘ influences to the society in Victorian Era in his Discussion on the Social Condition of Holmes39。 Sherlock Holmes。道爾完成了 《 福爾摩斯偵探集 》 的第一篇小說《血字的研究》。)。) figure:subplot(211),plot(a),title(39。 %收斂因子 for i=1:length E(i)=d(i)a(i:i+N1)39。%產(chǎn)生輸入信號 end end %%%%% LSM 算法 %%%%%%%%%%%%%%%%%%%%% a=a39。)。title(39。 %DCT 變換輸出 subplot(4,1,2)。 一維 N 點 離散余弦 變換 (DCT)可表示為: 10( 2 1 )c o s 2Nk k nnnky C x N ????? ? 其中, xn 是輸入時域序列中的第 n 項, yk 是輸出頻域序列的第 k 項,系數(shù) Ck定義如下: 102 1 , 2 , ..., 1kNkCN k N? ??? ????? 一維 N 點離散余弦逆變換 (IDCT)可以表示為: 10( 2 1 )c o s 2Nn k knnkx C y N ????? ? MATLAB 仿真 實驗 DCT 變換對語音信號的壓縮 DCT 變換的 MATLAB 實現(xiàn)方法,基于 FFT 的快速算法 , 這是通過 MATLAB 工具箱提供的 dct 和 idct 函數(shù)實現(xiàn)的 ,仿真結果如下 程序: t=0:1/1000:。TDAF 就是變換域中的 LMS 算法,所以也稱為 TDLMS 算法。 LMS算法是在最陡下降法的基礎上導 出的,可以說 LMS 算法是最陡下降法的隨機實現(xiàn)。表 1 詳細地給出 LMS 算法,其中 x(n)為 n 時刻濾波器的輸入信號, w(n)為n 時刻的濾波器系數(shù), y(n)為濾波器的輸出信號 , d(n)為濾波器的期望信號, e(n)為濾波器的估計誤差 , u 為更新步長 。 詳細算法如下所示。x=sawtooth(2*pi*45*t)。 plot(y)。DCT 壓縮后的信號 39。 仿真結果圖: 0 0 . 0 2 0 . 0 4 0 . 0 6 0 . 0 8 0 . 1 0 . 1 2 0 . 1 4 0 . 1 6 0 . 1 8 0 . 2101原始信號0 50 100 150 200 250505DCT 輸出信號0 50 100 150 200 250505D C T 壓縮后的信號0 0 . 0 2 0 . 0 4 0 . 0 6 0 . 0 8 0 . 1 0 . 1 2 0 . 1 4 0 . 1 6 0 . 1 8 0 . 2202恢復的信號 可以看出,當波形數(shù)據(jù)做 DCT 變換后壓縮到原數(shù)據(jù)的 %左右時 ,根據(jù)壓縮信號重建的時域波形存在失真,但在工程上這樣的失真是允許的。 d=zeros(1,length+N)。*w。輸入信號 a39。% 誤差的變化情況 仿真結果圖: 0 1000 2020 3000 4000 5000 6000 7000 8000 9000 5 0050100150輸入信號 a0 1000 2020 3000 4000 5000 6000 7000 8000 9000 2 00204060期望信號 d 0 50 100 150 200 250 300 350 400 450 500 0 . 100 . 10 . 20 . 3L M S 輸出信號 w50 100 150 200 250 300 350 400 450 500 5 0050DCT 輸出信號 y 0 1000 2020 3000 4000 5000 6000 7000 8000 9000 1 001020304050誤差 E 隨著自適應算法迭代次數(shù)的增加,濾波器輸出估計誤差逐漸變小 。隨后,福爾摩斯的探案故事紅遍全球,作者也因這部作品名利雙收。 Victorian Era。s Image and His Character Charm which is published in Writer Magazine. It presents the Sherlock Holmes changes the London of Victorian Era. ―For a long time, Holmes, the amazing character who was created by the famous British writer Arthur Conan Doyle, is not the character in the novels again, and he bees a man who has a great influence to British people.‖ (Yu Xiaoqun, 2020: 67) And her study analyses the image of Sherlock Holmes. The most impressive part is she thought Holmes is a ―lone hero‖ in London. ―In a sense, although Holmes lives in the city, he is just as Robinson in the lonely island. His fighting will shows the spirit and value of individual struggle. His creativity and intelligence embodies the charm from human.‖ (Yu Xiaoqun, 2020: 68) Previous Studies on the Tales of Sherlock Holmes The tales of Sherlock Holmes is thought as the Bible in detective novels. As same as ―the study of Shakespeare‖, there is ―the study of Holmes‖, too. And the foreign and domestic scholars make great contributions to the study. 寧波大學科學技術學院本科畢業(yè)設計(論文) 11 The foreign scholars presented their achievements in their monographs. Christopher Morley and Steven Rothman wrote The Standard Doyle Company: Christopher Morley on Sherlock Holmes together, and published in 1990. That Monograph collected large numbers of famous writers‘ mentaries. In those mentaries, the famous British novelist William Somerset Maugham‘s mentary was wildly known, ―No detective stories have ever had the popularity of Conan Doyl
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