This book is intended for RF planners, to serve as a practical tool in their daily work designing indoor radio distribution systems. Based on feedback from readers of the first edition it was clear to Me that I needed to add more material and in depth description of the basics of indoor systems based on using repeaters; this has grown into a new Section 4.7. There was also a strong demand to add more detail and dedicate a full chapter to radio planning in tunnels, for both rail and road tunnels; and redundancy principles in the design focus for solving the challenge of handover zones. An entire Chapter 11 is now dedicated to tunnel radio planning.
上傳時間： 2020-05-27
上傳用戶：shancjb
The roots of this book were planted about a decade ago. At that tiMe, I becaMe increasingly convinced that wide-area and Metropolitan-area networks, where much of my group’s research has been centered at that tiMe, were in good shape. Although research in these fields was (and still is) needed, that’s not where the networking bottleneck seeMed to be. Rather, the bottleneck was (and still is in many places) in the access networks, which choked users’ access to information and services. It was clear to Me that the long-term solution to that problem has to involve optical fiber access networks.
上傳時間： 2020-05-31
上傳用戶：shancjb
As a student I did my best to avoid text books – a strange stateMent for a Professor to make and one that I should clarify before you put this book down; I did my best to avoid text books that did not help Me.
標簽： Microdevices Ceramic Thick Films MeMS for and
上傳時間： 2020-06-06
上傳用戶：shancjb
I would like to thank you for purchasing the second edition of “Industrial Network Security,” especially if you are one of the many supporters of the first edition. When the second edition was announced, many people asked Me, “why a second edition?” and even more followed that up with, “and why a coauthor?” These ques- tions are harder to answer than you would think.
標簽： Industrial Security Network
上傳時間： 2020-06-07
上傳用戶：shancjb
This manuscript is a partial draft of a book to be published in early 1994 by AddisonWesley (ISBN 0-201-63337-X). Addison-Wesley has given Me permission to make drafts of the book available to the Tcl community to help Meet the need for introductory docuMentation on Tcl and Tk until the book becoMes available. Please observe the restrictions set forth in the copyright notice above: you’re welcoMe to make a copy for yourself or a friend but any sort of large-scale reproduction or reproduction for profit requires advance permission from Addison-Wesley
標簽： Toolkit
上傳時間： 2020-07-05
上傳用戶：
It all started rather innocuously. I walked into Dr GT Murthy’s office one fine day, andchanged my life. “Doc” was then the General Manager, Central R&D, of a very largeelectrical company headquartered in Bombay. In his new state-of-the-art electronics center,he had hand-picked soMe of India’s best engineers (over a hundred already) ever assembledunder one roof. Luckily, he too was originally a Physicist, and that certainly helped Me gainsoMe empathy. Nowadays he is in retireMent, but I will always reMember him as athoroughly fair, honest and facts-oriented person, who led by example. There were severalthings I absorbed from him that are very much part of my basic engineering persona today.You can certainly look upon this book as an extension of what Doc started many years agoin India … because that’s what it really is! I certainly wouldn’t be here today if I hadn’t MetDoc. And in fact, several of the brash, high-flying managers I’ve Met in recent years,desperately need soMe sort of crash course in technology and human values from Doc!
標簽： 開關電源
上傳時間： 2021-11-23
上傳用戶：
◆無線充電是電子產品“無尾化”進程的一部分。搖脫線纜的來縛是消夤電子產業發展的必然趨勢，也是無線互聯網時代的自然害求。包抬3G4G等在內的無線通信技術主要麟決了數據文互的無線化，而能量傳輸的無線化作為“無尾化”發展趨勢的重要組織部分，必須通過無線充電技術來完或。在盤據傳輸無線化進入高湖的今天能量傳的無線化將得到更多的重視。而“無尾化”趨勢的最終發展方向則是無線數據傳輸和無線能量傳的融合◆無踐充電技術在消費電子領域大有可為，消費電子市場下游體量巨大，智能手機平板電腦，PC以及近期越演越烈的可穿鵡風湖為無線充電產品提供了足夠的發展空間。在智能予機和乎板電腦增長呈現疲態的后智能化時代，無線充電技術是各大廠商無法避開的產品創新。而從消費者角度講。無線充電技術在無線互聯網和智能終端大爆發的背景下能夠帶來用戶體驗的大幅提高。◆。無線充電產業啟動的外部環境在2014年得到很大改善，根搭 isuppli的預計到2015年全球無線充電行業產值將達到240億美元，但是其在2013年的滲遺逵度卻遠低于業界預期，主要是成本過高。標準不統一和充電效率不理想這三大固素制了產業啟動。而在2014年，隨著技術的進步以及多模方案的成熱，這些限制概頸將逐一被突破，無線充電產業發展的外部環境將得到很大改善，這就使得產業啟動成為可能巨頭紛紛加入，無線充電產業有望在2014年迎來揚點。不管是在技術實力上，還是場號召力上，行業巨頭的態度直接決定了無線充電產業何時啟動以及以何種方式唇動，而在2014年的CEs上，包括Me，高通、悔通等在內的行業巨頭，一改此前出聲不出力的做法，開始實質性的加大了對無線充電技術的投入力度，各種相關產品和方袋紛紛亮相。行業巨頭們的強勢加入將形成巨大的帶動效應，推動無線充電產業在2014年實現實質性啟動
標簽： 無線充電
上傳時間： 2022-03-30
上傳用戶：
FU6831 是一款集成 8051 內核和電機控制引擎(Me)的電機驅動專用芯片，8051 內核處理常規事務，Me 處理電機實時事務，雙核協同工作實現各種高性能電機控制。其中 8051 內核大部分指令周期為 1T 或 2T，芯片內部集成有高速運算放大器、比較器、Pre-driver、高速 ADC、高速乘/除法器、CRC、SPI、I2C、UART、多種 TIMeR、PWM 等功能，內置高壓 LDO，適用于 BLDC/PMSM 電機的方波、SVPWM/SPWM、FOC 驅動控制。預驅動為 3P3N Predriver 輸出。
標簽： fu6831
上傳時間： 2022-07-09
上傳用戶：
FU6831/11 是一款集成 8051 內核和電機控制引擎(Me)的電機驅動專用芯片，8051 內核處理常規事務，Me 處理電機實時事務，雙核協同工作實現各種高性能電機控制。其中 8051 內核大部分指令周期為 1T 或 2T，芯片內部集成有高速運算放大器、比較器、Pre-driver(FU6811 除外)、高速 ADC、高速乘/除法器、CRC、SPI、I2C、UART、多種 TIMeR、PWM 等功能，內置高壓 LDO，適用于BLDC/PMSM 電機的方波、SVPWM/SPWM、FOC 驅動控制。預驅動類型為：FU6811 為 Gate Driver 輸出；FU6831 為 3P3N Predriver 輸出。
標簽： FU6831
上傳時間： 2022-07-09
上傳用戶：
由于文件較大，附件提供了百度網盤的分享地址和提取碼。打開即可下載或轉存。microsoft visio 2016(visio2016)是微軟官方最新發布的一款領先的圖表解決方案，可以幫助企業定義流程、編制最佳方案、同時也是建立可視化計劃變革的實用工具。新版本的visio2016為15大最熱門的領域提供了直觀和易于訪問的預設模板；比如通過Office 365你可以向任何人分享視頻圖表，并就其中一個版本進行溝通，以保持和推動全局的一致性。visio2016提供了上手圖例（starter diagrams）、成百上千的智能形狀、一步數據鏈接、以及信息權限管理（IRM）等功能，可視化工作可以以往更快更輕松。除了上手圖例，visio2016還加入了office 2016上全新的“Tell Me”功能，通過它，用戶可以在導航欄上輕松訪問超過800 Visio命令。visio2016的“新手入門”功能再次經歷大幅變動，現在操作更加簡單。對于新用戶以及不習慣其豐富工具的用戶來說，Visio圖表顯得有些“嚇人”。visio2016現在通過提供一組篩選后的預繪制圖表來幫助用戶熟悉該應用的核心使用場景，從而讓它顯得更加“平易近人”。visio2016還提供了一些與圖表相關的操作技巧，幫助用戶順利編輯與完成圖表，Visio已經變得比以往更加好用。
標簽： microsoft visio
上傳時間： 2022-08-09
上傳用戶：
