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In case you haven’t noticed, multimedia communication over IP and wireless net-
works is exploding. Applications such as BitTorrent, used primarily for video
downloads, now take up the lion’s share of all traffic on the Internet. Music file
sharing, once on the legal cutting Edge of massive copyright infringement on col-
lege campuses around the world, has moved into the mainstream with signifi-
cant legal downloads of music and video to devices such as the iPod and nu-
merous other portable media players.
標(biāo)簽：
Multimedia
Over
IP
上傳時(shí)間：
2020-05-31
上傳用戶(hù)：shancjb
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Digital mobile wireless communication and the Internet have undergone a
fantastic growth in the last few years and, despite originating from two different
worlds, they are converging. This convergence corresponds to the evolution of
mobile systems towards the highest broadband data transmissions (GSM,
Edge/GPRS, UMTS then HSDPA), while the computing world gets equipped with
wireless technologies such as Wi-Fi or Wi-Max.
標(biāo)簽：
Reconfigurable
Systems
Mobile
Radio
上傳時(shí)間：
2020-06-01
上傳用戶(hù)：shancjb
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This book is written for engineers involved in the operation, control, and
planning of electric power systems. In addition, the book provides information and
tools for researchers working in the fields of power system security and stability. The
book consists of two volumes. The first volume provides traditional techniques for the
stability analysis of large scale power systems. In addition, an overview of the main
drivers and requirements for modernization of the traditional methods for online
applications are discussed. The second volume provides techniques for online security
assessment and corrective action studies. In addition, the impact of variable generation
on the security of power systems is considered in the second volume. The first volume
may be considered as a background builder while the second volume is intended for
the coverage of Edge techniques and methods for online dynamic security studies.
標(biāo)簽：
Security
Dynamic
上傳時(shí)間：
2020-06-07
上傳用戶(hù)：shancjb
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百度文庫(kù)網(wǎng)頁(yè)免費(fèi)瀏覽插件，支持谷歌、火狐、Edge，可以免費(fèi)復(fù)制百度文庫(kù)中內(nèi)容，可自動(dòng)嗅探下載鏈接，免費(fèi)下載百度文庫(kù)文檔。網(wǎng)頁(yè)腳本插件，內(nèi)存占用小，瀏覽器的萬(wàn)能插件，親測(cè)好用。安裝步驟可搜索百度geasy fork網(wǎng)站。轉(zhuǎn)載geasy fork油猴腳本插件，非作者原創(chuàng)，程序猿良心工藝，優(yōu)良插件，值得擁有。
標(biāo)簽：
免費(fèi)下載插件
上傳時(shí)間：
2021-10-20
上傳用戶(hù)：
-
General Design Specification:1. AC Input Range 180-264Vac, Isolated ac-dc offline, 12LEDS,Output 700mA2. Intelligent wall dimmer detections(Leading-Edge dimmer , Trailing-Edgedimmer , No-dimmer)3. Multiple dimming control scheme4. Wide dimming range from 1% up to 100%5. No visible flicker6. Resonant control to achieve high efficiency7. High Power Factor, 0.9 without dimmer8. Temperature degrade control to adjust the LED9. Primary-only Sensing eliminates opto-isolator feedback and simplifies design
標(biāo)簽：
iw3617
上傳時(shí)間：
2021-12-03
上傳用戶(hù)：canderile
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This texts contemporary approach focuses on the concepts of linear control systems, rather than computational mechanics. Straightforward coverage includes an integrated treatment of both classical and modern control system methods. The text emphasizes design with discussions of problem formulation, design criteria, physical constraints, several design methods, and implementation of compensators.Discussions of topics not found in other texts--such as pole placement, model matching and robust tracking--add to the texts cutting-Edge presentation. Students will appreciate the applications and discussions of practical aspects, including the leading problem in developing block diagrams, noise, disturbances, and plant perturbations. State feedback and state estimators are designed using state variable equations and transfer functions, offering a comparison of the two approaches. The incorporation of MATLAB throughout the text helps students to avoid time-consuming computation and concentrate on control system design and analysis
標(biāo)簽：
控制系統(tǒng)
上傳時(shí)間：
2021-12-15
上傳用戶(hù)：
-
LTC2756 18位乘法串行輸入電流輸出數(shù)模轉(zhuǎn)換器DAC模塊ALTIUM原理圖+PCB文件，硬件4層板設(shè)計(jì)，大小為66mmx39mm，ALTIUM設(shè)計(jì)的工程文件，包括完整的原理圖和PCB文件，可以做為你的設(shè)計(jì)參考。
原理圖器件列表：
Library Component Count : 14
Name Description
----------------------------------------------------------------------------------------------------
AD8397ARDZ Imported
Capacitor CAP.,1uF,X74,10V,10%,1206
Header 10X1 2.54
Header, 100mil, 2x1_1Header, 100mil, 2x1, Tin plated, TH
Header, 100mil, 3x1 Header, 100mil, 3x1, Tin plated, TH
KJDZ-2 快接端子
LT1012 LT1012
LT1360 LT1360
LTC2054_1 LTC2054
LTC2756AIG LTC2756AIG
LTC6244 Imported
LTC6655 LTC6655
Resistor RES.,1K OHMS,5%,1/16W,0603
SMA-KE CONNECTOR, SHEILDED, END LAUNCH JACK, GOLD PLATED, FOR 0.062 PCB, Edge MOUNTED
標(biāo)簽：
數(shù)模轉(zhuǎn)換器
上傳時(shí)間：
2021-12-22
上傳用戶(hù)：
-
SENT（Single Edge Nibble Transmission，單邊半字節(jié)傳輸）協(xié)議（如SAE J2716）適用于汽車(chē)及運(yùn)輸行業(yè)中對(duì)安全性要求嚴(yán)格和對(duì)成本敏感的應(yīng)用。
標(biāo)簽：
汽車(chē)通訊
sent協(xié)議
上傳時(shí)間：
2022-01-05
上傳用戶(hù)：
-
ML7820+Mini PCI-E LTE 無(wú)線(xiàn)模塊是一款適用于 FDD-LTE/TDD-LTE/TD-SCDMA/WCDMA/Edge/GPRS/GSM 多種網(wǎng)絡(luò)制式的無(wú)線(xiàn)產(chǎn)品，采用標(biāo)準(zhǔn) Mini PCI-E 封裝形式，接口成熟。可以提供短信、通訊簿、高速數(shù)據(jù)等多種功能，可廣泛應(yīng)用于移動(dòng)寬帶接入、視頻監(jiān)控、手持終端、車(chē)載設(shè)備等產(chǎn)品。
標(biāo)簽：
ml7820
lte
上傳時(shí)間：
2022-03-24
上傳用戶(hù)：
-
邊緣（Edge）是指圖像局部強(qiáng)度變化最顯著的部分.邊緣主要存在于目標(biāo)與目標(biāo)、目標(biāo)與背景、區(qū)域與區(qū)域（包括不同色彩）之間，是圖像分割、紋理特征和形狀特征等圖像分析的重要基礎(chǔ).圖像分析和理解的第一步常常是邊緣檢測(cè)（Edge detection）.由于邊緣檢測(cè)十分重要，因此成為機(jī)器視覺(jué)研究領(lǐng)域最活躍的課題之一.本章主要討論邊緣檢測(cè)和定位的基本概念，并使用幾種常用的邊緣檢測(cè)器來(lái)說(shuō)明邊緣檢測(cè)的基本問(wèn)題圖像中的邊緣通常與圖像強(qiáng)度或圖像強(qiáng)度的一階導(dǎo)數(shù)的不連續(xù)性有關(guān).圖像強(qiáng)度的不連續(xù)可分為：（）階躍不連續(xù)，即圖像強(qiáng)度在不連續(xù)處的兩邊的像素灰度值有著顯著的差異（2）線(xiàn)條不連續(xù)，即圖像強(qiáng)度突然從一個(gè)值變化到另一個(gè)值，保持一個(gè)較小的行程后又返回到原來(lái)的值.在實(shí)際中，階躍和線(xiàn)條邊緣圖像是很少見(jiàn)的，由于大多數(shù)傳感元件具有低頻特性，使得階躍邊緣變成斜坡型邊緣，線(xiàn)條邊緣變成屋頂形邊緣，其中的強(qiáng)度變化不是瞬間的，而是跨越一定的距離，這些邊緣如圖6.1所示對(duì)一個(gè)邊緣來(lái)說(shuō)，有可能同時(shí)具有階躍和線(xiàn)條邊緣特性.例如在一個(gè)表面上，由一個(gè)平面變化到法線(xiàn)方向不同的另一個(gè)平面就會(huì)產(chǎn)生階躍邊緣：如果這一表面具有鏡面反射特性且兩平面形成的棱角比較圓滑，則當(dāng)棱角圓滑表面的法線(xiàn)經(jīng)過(guò)鏡面反射角時(shí)，由于鏡面反射分量，在棱角圓滑表面上會(huì)產(chǎn)生明亮光條，這樣的邊緣看起來(lái)象在階躍邊緣上疊加了一個(gè)線(xiàn)條邊緣.由于邊緣可能與場(chǎng)景中物體的重要特征對(duì)應(yīng)，所以它是很重要的圖像特征。比如，個(gè)物體的輪廓通常產(chǎn)生階躍邊緣，因?yàn)槲矬w的圖像強(qiáng)度不同于背景的圖像強(qiáng)度在討論邊緣算子之前，首先給出一些術(shù)語(yǔ)的定義：邊緣點(diǎn)：圖像中具有坐標(biāo)[門(mén)且處在強(qiáng)度顯著變化的位置上的點(diǎn)邊緣段：對(duì)應(yīng)于邊緣點(diǎn)坐標(biāo)[，門(mén)及其方位，邊緣的方位可能是梯度角邊緣檢測(cè)器：從圖像中抽取邊緣（邊緣點(diǎn)和邊緣段）集合的算法
標(biāo)簽：
邊緣檢測(cè)
數(shù)字圖像處理
計(jì)算機(jī)視覺(jué)
上傳時(shí)間：
2022-04-22
上傳用戶(hù)：bluedrops
