這是一個(gè)用小波對(duì)含噪信號(hào)進(jìn)行濾波處理的程序,程序中還包括了功率譜密度分析等。
上傳時(shí)間: 2014-12-08
上傳用戶(hù):sdq_123
上下文無(wú)關(guān)文法(Context-Free Grammar, CFG)是一個(gè)4元組G=(V, T, S, P),其中,V和T是不相交的有限集,S∈V,P是一組有限的產(chǎn)生式規(guī)則集,形如A→α,其中A∈V,且α∈(V∪T)*。V的元素稱(chēng)為非終結(jié)符,T的元素稱(chēng)為終結(jié)符,S是一個(gè)特殊的非終結(jié)符,稱(chēng)為文法開(kāi)始符。 設(shè)G=(V, T, S, P)是一個(gè)CFG,則G產(chǎn)生的語(yǔ)言是所有可由G產(chǎn)生的字符串組成的集合,即L(G)={x∈T* | Sx}。一個(gè)語(yǔ)言L是上下文無(wú)關(guān)語(yǔ)言(Context-Free Language, CFL),當(dāng)且僅當(dāng)存在一個(gè)CFG G,使得L=L(G)。 *⇒ 例如,設(shè)文法G:S→AB A→aA|a B→bB|b 則L(G)={a^nb^m | n,m>=1} 其中非終結(jié)符都是大寫(xiě)字母,開(kāi)始符都是S,終結(jié)符都是小寫(xiě)字母。
標(biāo)簽: Context-Free Grammar CFG
上傳時(shí)間: 2013-12-10
上傳用戶(hù):gaojiao1999
一:需求分析 1. 問(wèn)題描述 魔王總是使用自己的一種非常精練而抽象的語(yǔ)言講話,沒(méi)人能聽(tīng)懂,但他的語(yǔ)言是可逐步解釋成人能聽(tīng)懂的語(yǔ)言,因?yàn)樗恼Z(yǔ)言是由以下兩種形式的規(guī)則由人的語(yǔ)言逐步抽象上去的: ----------------------------------------------------------- (1) a---> (B1)(B2)....(Bm) (2)[(op1)(p2)...(pn)]---->[o(pn)][o(p(n-1))].....[o(p1)o] ----------------------------------------------------------- 在這兩種形式中,從左到右均表示解釋.試寫(xiě)一個(gè)魔王語(yǔ)言的解釋系統(tǒng),把 他的話解釋成人能聽(tīng)得懂的話. 2. 基本要求: 用下述兩條具體規(guī)則和上述規(guī)則形式(2)實(shí)現(xiàn).設(shè)大寫(xiě)字母表示魔王語(yǔ)言的詞匯 小寫(xiě)字母表示人的語(yǔ)言的詞匯 希臘字母表示可以用大寫(xiě)字母或小寫(xiě)字母代換的變量.魔王語(yǔ)言可含人的詞匯. (1) B --> tAdA (2) A --> sae 3. 測(cè)試數(shù)據(jù): B(ehnxgz)B 解釋成 tsaedsaeezegexenehetsaedsae若將小寫(xiě)字母與漢字建立下表所示的對(duì)應(yīng)關(guān)系,則魔王說(shuō)的話是:"天上一只鵝地上一只鵝鵝追鵝趕鵝下鵝蛋鵝恨鵝天上一只鵝地上一只鵝". | t | d | s | a | e | z | g | x | n | h | | 天 | 地 | 上 | 一只| 鵝 | 追 | 趕 | 下 | 蛋 | 恨 |
上傳時(shí)間: 2014-12-02
上傳用戶(hù):jkhjkh1982
估算帶寬,先是計(jì)算輸入信號(hào)單邊帶功率譜密度,然后估算出信號(hào)所占的帶寬
標(biāo)簽: 帶寬
上傳時(shí)間: 2013-12-26
上傳用戶(hù):kytqcool
We have a group of N items (represented by integers from 1 to N), and we know that there is some total order defined for these items. You may assume that no two elements will be equal (for all a, b: a<b or b<a). However, it is expensive to compare two items. Your task is to make a number of comparisons, and then output the sorted order. The cost of determining if a < b is given by the bth integer of element a of costs (space delimited), which is the same as the ath integer of element b. Naturally, you will be judged on the total cost of the comparisons you make before outputting the sorted order. If your order is incorrect, you will receive a 0. Otherwise, your score will be opt/cost, where opt is the best cost anyone has achieved and cost is the total cost of the comparisons you make (so your score for a test case will be between 0 and 1). Your score for the problem will simply be the sum of your scores for the individual test cases.
標(biāo)簽: represented integers group items
上傳時(shí)間: 2016-01-17
上傳用戶(hù):jeffery
The XML Toolbox converts MATLAB data types (such as double, char, struct, complex, sparse, logical) of any level of nesting to XML format and vice versa. For example, >> project.name = MyProject >> project.id = 1234 >> project.param.a = 3.1415 >> project.param.b = 42 becomes with str=xml_format(project, off ) "<project> <name>MyProject</name> <id>1234</id> <param> <a>3.1415</a> <b>42</b> </param> </project>" On the other hand, if an XML string XStr is given, this can be converted easily to a MATLAB data type or structure V with the command V=xml_parse(XStr).
標(biāo)簽: converts Toolbox complex logical
上傳時(shí)間: 2016-02-12
上傳用戶(hù):a673761058
可實(shí)現(xiàn)QAM的星座圖輸出,仿真波形圖輸出,功率譜密度輸出
上傳時(shí)間: 2013-12-10
上傳用戶(hù):xiaodu1124
本程序能夠產(chǎn)生ami碼,并且能夠繪制其波形圖和功率譜密度圖
上傳時(shí)間: 2014-01-19
上傳用戶(hù):hjshhyy
Study on LD Pumped Yb3+ -doped Double-clad Fiber Lasers數(shù)值分析對(duì)線形腔LD泵浦摻鐿的雙包層光纖激光器進(jìn)行研究,分析了單端泵浦和雙端泵浦的泵浦光及激光輸出功率和增益在光纖中的分布,結(jié)果表明,非均勻泵浦比較適合高功率光纖激光器。
標(biāo)簽: Double-clad Pumped Lasers Study
上傳時(shí)間: 2013-12-25
上傳用戶(hù):jichenxi0730
Study on LD Pumped Yb3+ -doped Double-clad Fiber Lasers數(shù)值分析對(duì)線形腔LD泵浦摻鐿的雙包層光纖激光器進(jìn)行研究,分析了單端泵浦和雙端泵浦的泵浦光及激光輸出功率和增益在光纖中的分布,結(jié)果表明,非均勻泵浦比較適合高功率光纖激光器。
標(biāo)簽: Double-clad Pumped Lasers Study
上傳時(shí)間: 2014-01-12
上傳用戶(hù):我們的船長(zhǎng)
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