W ?????????abooklikethistogether,manypeoplewhoneverhope to see their namesinprint get involved and provide alot of help. I wouldliketogivecreditwherecreditisdueandacknowledgethose people here. Firstandforemost,atleasthalfofthecreditforthisbookneedstogotomy wife,BrigitteKilger-Mattison. Brigittewasresponsible for editingall the mate- rial, creating all the graphics, and coordinating all the efforts of everyone else involvedinthisproject.Thisbookcouldnothavebeencompletedwithouther painstaking attention to detail, her dedication, and her loyalty.
標(biāo)簽: Data Warehousing Mining and
上傳時(shí)間: 2020-05-27
上傳用戶:shancjb
This edition updates and continues the series of books based on the residential courses on radiowave propagation organised by the IEE/IET. The first course was held in 1974, with lectures by H. Page, P. Matthews, D. Parsons, M.W. Gough, P.A. Watson, E. Hickin, T. Pratt, P. Knight, T.B. Jones, P.A. Bradley, B. Burgess and H. Rishbeth.
標(biāo)簽: Propagation Radiowaves edition 3rd of
上傳時(shí)間: 2020-05-31
上傳用戶:shancjb
Part I provides a compact survey on classical stochastic geometry models. The basic models defined in this part will be used and extended throughout the whole monograph, and in particular to SINR based models. Note however that these classical stochastic models can be used in a variety of contexts which go far beyond the modeling of wireless networks. Chapter 1 reviews the definition and basic properties of Poisson point processes in Euclidean space. We review key operations on Poisson point processes (thinning, superposition, displacement) as well as key formulas like Campbell’s formula. Chapter 2 is focused on properties of the spatial shot-noise process: its continuity properties, its Laplace transform, its moments etc. Both additive and max shot-noise processes are studied. Chapter 3 bears on coverage processes, and in particular on the Boolean model. Its basic coverage characteristics are reviewed. We also give a brief account of its percolation properties. Chapter 4 studies random tessellations; the main focus is on Poisson–Voronoi tessellations and cells. We also discuss various random objects associated with bivariate point processes such as the set of points of the first point process that fall in a Voronoi cell w.r.t. the second point process.
標(biāo)簽: Stochastic Geometry Networks Wireless Volume and
上傳時(shí)間: 2020-06-01
上傳用戶:shancjb
正則表達(dá)式用于字符串處理、表單驗(yàn)證等場(chǎng)合,實(shí)用高效。現(xiàn)將一些常用的表達(dá)式收集于此,以備不時(shí)之需。 匹配中文字符的正則表達(dá)式: [\u4e00-\u9fa5] 評(píng)注:匹配中文還真是個(gè)頭疼的事,有了這個(gè)表達(dá)式就好辦了 匹配雙字節(jié)字符(包括漢字在內(nèi)):[^\x00-\xff] 評(píng)注:可以用來計(jì)算字符串的長(zhǎng)度(一個(gè)雙字節(jié)字符長(zhǎng)度計(jì)2,ASCII字符計(jì)1) 匹配空白行的正則表達(dá)式:\n\s*\r 評(píng)注:可以用來刪除空白行 匹配HTML標(biāo)記的正則表達(dá)式:<(\S*?)[^>]*>.*?</\1>|<.*? /> 評(píng)注:網(wǎng)上流傳的版本太糟糕,上面這個(gè)也僅僅能匹配部分,對(duì)于復(fù)雜的嵌套標(biāo)記依舊無能為力 匹配首尾空白字符的正則表達(dá)式:^\s*|\s*$ 評(píng)注:可以用來刪除行首行尾的空白字符(包括空格、制表符、換頁符等等),非常有用的表達(dá)式 匹配Email地址的正則表達(dá)式:\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)* 評(píng)注:表單驗(yàn)證時(shí)很實(shí)用 匹配網(wǎng)址URL的正則表達(dá)式:[a-zA-z]+://[^\s]* 評(píng)注:網(wǎng)上流傳的版本功能很有限,上面這個(gè)基本可以滿足需求 匹配帳號(hào)是否合法(字母開頭,允許5-16字節(jié),允許字母數(shù)字下劃線):^[a-zA-Z][a-zA-Z0-9_]{4,15}$ 評(píng)注:表單驗(yàn)證時(shí)很實(shí)用 匹配國(guó)內(nèi)電話號(hào)碼:\d{3}-\d{8}|\d{4}-\d{7} 評(píng)注:匹配形式如 0511-4405222 或 021-87888822 匹配騰訊QQ號(hào):[1-9][0-9]{4,} 評(píng)注:騰訊QQ號(hào)從10000開始 匹配中國(guó)郵政編碼:[1-9]\d{5}(?!\d) 評(píng)注:中國(guó)郵政編碼為6位數(shù)字 匹配身份證:\d{15}|\d{18} 評(píng)注:中國(guó)的身份證為15位或18位 匹配ip地址:\d+\.\d+\.\d+\.\d+ 評(píng)注:提取ip地址時(shí)有用。 匹配特定數(shù)字:
上傳時(shí)間: 2020-12-16
上傳用戶:
SI-PNP 60 V 0,6 A 0,6 W 100 MHz
標(biāo)簽: 2N2905
上傳時(shí)間: 2021-07-02
上傳用戶:xiangshuai
復(fù)活節(jié)計(jì)算 int y, n, a, q, b, m, w, d, mm = 4; y = atoi(argv[1]); n = y-1900; a = fmod(n,19);
上傳時(shí)間: 2021-07-09
上傳用戶:scfan2004
快速傅里葉變換,fft應(yīng)用實(shí)例。供學(xué)習(xí),供參考。 原理:快速傅里葉變換 (fast Fourier transform), 即利用計(jì)算機(jī)計(jì)算離散傅里葉變換(DFT)的高效、快速計(jì)算方法的統(tǒng)稱,簡(jiǎn)稱FFT。快速傅里葉變換是1965年由J.W.庫利和T.W.圖基提出的。采用這種算法能使計(jì)算機(jī)計(jì)算離散傅里葉變換所需要的乘法次數(shù)大為減少,特別是被變換的抽樣點(diǎn)數(shù)N越多,F(xiàn)FT算法計(jì)算量的節(jié)省就越顯著。
上傳時(shí)間: 2021-07-14
上傳用戶:hhh4321
PROTEL99SE電路設(shè)計(jì)教程protell技術(shù)大全程簡(jiǎn)明使用手冊(cè)Protel封裝庫至Allegro的轉(zhuǎn)化等學(xué)習(xí)文檔資料PROTEL 99 SE特性手冊(cè).docPROTEL 99SE 簡(jiǎn)明使用手冊(cè).docProtel for Windows PCB 轉(zhuǎn) GERBER文件.mhtProtel PCB 轉(zhuǎn)SCH全攻略.pdfProtel 原理圖-PCB到Cadence的數(shù)據(jù)轉(zhuǎn)換.mhtProtel99 SE Gerber File 輸出說明.mhtPROTEL99SE教程protell技術(shù)大全.docProtel到Allegro -CCT格式轉(zhuǎn)換.mhtProtel封裝庫至Allegro的轉(zhuǎn)化.pdfProtel常見錯(cuò)誤.pdfPRTEL99的PCB文件生成GERBER文件流程.mhtW-Protel99SE精彩教程.chm電路設(shè)計(jì)與制板Protel99入門與提高.pdf
標(biāo)簽: protel99se 電路設(shè)計(jì)
上傳時(shí)間: 2021-10-15
上傳用戶:
AD7790是一款適合低頻測(cè)量應(yīng)用的低功耗、完整模擬前端,內(nèi)置一個(gè)低噪聲16位Σ-Δ型ADC,一路差分輸入可配置為緩沖或無緩沖模式,此外還有一個(gè)增益可設(shè)置為1、2、 4或8的數(shù)字PGA。該器件采用內(nèi)部時(shí)鐘工作,因此,用戶不必為其提供時(shí)鐘源。器件的輸出數(shù)據(jù)速率可通過軟件編程設(shè)置,可在9.5 Hz至120 Hz的范圍內(nèi)變化,更新速率較低時(shí)均方根(RMS)噪聲為1.1 μV。內(nèi)部時(shí)鐘頻率可以使用系數(shù)2、 4或8進(jìn)行分頻,從而可以降低功耗。更新速率、截止頻率和建立時(shí)間與時(shí)鐘頻率成比例變化。這款器件采用2.5 V至5.25 V電源供電,工作電壓為3 V時(shí),最大功耗為225 μW,采用10引腳MSOP封裝。
上傳時(shí)間: 2021-10-25
上傳用戶:得之我幸78
[摘要]全球電源管理技術(shù)領(lǐng)袖國(guó)際整流器公司(International Rectifier,簡(jiǎn)稱IR)今天發(fā)布了IR1150 系列產(chǎn)品,專用于AC-DC 功率因數(shù)矯正電路,商標(biāo)為PFC(tm)。由于采用緊湊的SO-8 封裝,有助于將PFC 控制板面積縮減一半,在75W-4k W 功率范圍內(nèi),為計(jì)算機(jī)、消費(fèi)電子產(chǎn)品和家電提供了簡(jiǎn)便、靈活、高密度的解決方案。
標(biāo)簽: ir集成電路
上傳時(shí)間: 2021-11-23
上傳用戶:
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