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The Home Gateway Initiative (HGI) is a non-profit making organization which publishes guidelines,
requirements documents, white papers, vision papers, test plans and other documents concerning
broadband equipment and services which are deployed in the home.
標(biāo)簽：
Evaluation
Discussion
Framework
Document
KPI
上傳時(shí)間：
2020-06-06
上傳用戶(hù)：shancjb
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RFID (radio-frequency identification) is the use of a wireless non-contact system
that uses radio-frequencyelectromagnetic fields to transfer datafrom a tag attached
to an object, for the purposes of automatic identification and tracking [38]. The
basic technologies for RFID have been around for a long time. Its root can be traced
back to an espionage device designed in 1945 by Leon Theremin of the Soviet
Union,whichretransmittedincidentradiowaves modulatedwith audioinformation.
After decades of development, RFID systems have gain more and more attention
from both the research community and the industry.
標(biāo)簽：
Infrastructure
RFID
as
an
上傳時(shí)間：
2020-06-08
上傳用戶(hù)：shancjb
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I wrote this book so that students, hobbyists, and engineers alike can take advantage of the Arduino
platform by creating several projects that will teach them about the engineering process. I also wanted to
guide the reader through introductory projects so that they could get a firm grasp on the Arduino
Language, and how to incorporate several pieces of hardware to make their own projects.
This book offers so much information on the Arduino, not just the basic LED projects but it
offers different peripherals such as Ultrasonic sensor, the Xbox? controller, Bluetooth, and much more.
This book also teaches the non-engineer to follow a process that will help them in future project (not just
Arduino projects).
標(biāo)簽：
Engineering
Practical
Arduino
上傳時(shí)間：
2020-06-09
上傳用戶(hù)：shancjb
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The main aim of this book is to present a unified, systematic description of
basic and advanced problems, methods and algorithms of the modern con-
trol theory considered as a foundation for the design of computer control
and management systems. The scope of the book differs considerably from
the topics of classical traditional control theory mainly oriented to the
needs of automatic control of technical devices and technological proc-
esses. Taking into account a variety of new applications, the book presents
a compact and uniform description containing traditional analysis and op-
timization problems for control systems as well as control problems with
non-probabilistic models of uncertainty, problems of learning, intelligent,
knowledge-based and operation systems – important for applications in the
control of manufacturing processes, in the project management and in the
control of computer systems.
標(biāo)簽：
Modern_Control_Theory
上傳時(shí)間：
2020-06-10
上傳用戶(hù)：shancjb
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【實(shí)例簡(jiǎn)介】
一、Delphi程序啟動(dòng)Word
采用CreateOleObjects的方法來(lái)啟動(dòng)Word，調(diào)用VBA代碼，具體實(shí)現(xiàn)過(guò)程為：
首先使用GetActiveOleObject('Word.Application')判斷當(dāng)前內(nèi)存中是否存在Word程序，如果存在，則直接連接，如果沒(méi)有Word程序，則使用CreateOleObject('Word.Application')啟動(dòng)Word
二、Delphi程序新建Word文稿
格式：WordDocuments.Add(Template,NewTemplate,DocumentType,Visible)
Template： 使用模板的名稱(chēng)，
NewTemplate： 新建文檔的類(lèi)型，True表示為模板，F(xiàn)alse表示為文檔
DocumentType： 文檔類(lèi)型，默認(rèn)為空白文檔
Visible： 打撈的窗口是否可見(jiàn)
標(biāo)簽：
deljosdfsd
上傳時(shí)間：
2021-01-12
上傳用戶(hù)：
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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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The PW5300 is a current mode boost DC-DC converter. Its PWM circuitry with built-in 0.2? powerMOSFET make this regulator highly power efficient. The internal compensation network alsominimizes as much as 6 external component counts. The non-inverting input of error amplifierconnects to a 0.6V precision reference voltage and internal soft-start function can reduce the inrushcurrent. The PW5300 is available in the SOT23-6L package and provides space-saving PCB for theapplication fields
標(biāo)簽：
pw5300
上傳時(shí)間：
2022-02-11
上傳用戶(hù)：jiabin
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解讀 5G 八大關(guān)鍵技術(shù) 【摘要】5G 不是一次革命，5G 是 4G 的延續(xù)，我相信 5G 在核心網(wǎng)部分不會(huì)有太 大的變動(dòng)，5G 的關(guān)鍵技術(shù)集中在無(wú)線(xiàn)部分。 在進(jìn)入主題之前，我覺(jué)得首先應(yīng)該弄清楚一個(gè)問(wèn)題：為什么需要 5G？不是因 為通信工程師們突然想改變世界，而炮制了一個(gè) 5G。是因?yàn)橄扔辛诵枨螅庞辛?5G。什么需求？ 未來(lái)的網(wǎng)絡(luò)將會(huì)面對(duì)：1000 倍的數(shù)據(jù)容量增長(zhǎng)，10 到 100 倍的無(wú)線(xiàn)設(shè)備連接， 10 到 100 倍的用戶(hù)速率需求，10 倍長(zhǎng)的電池續(xù)航時(shí)間需求等等。坦白的講，4G 網(wǎng)絡(luò)無(wú)法滿(mǎn)足這些需求，所以 5G 就必須登場(chǎng)。 但是，5G 不是一次革命。5G 是 4G 的延續(xù)，我相信 5G 在核心網(wǎng)部分不會(huì)有 太大的變動(dòng)，5G 的關(guān)鍵技術(shù)集中在無(wú)線(xiàn)部分。雖然 5G 最終將采用何種技術(shù)，目前 還沒(méi)有定論。不過(guò)，綜合各大高端論壇討論的焦點(diǎn)，我今天收集了 8 大關(guān)鍵技術(shù)。 當(dāng)然，應(yīng)該遠(yuǎn)不止這些。 1.非正交多址接入技術(shù) （Non-Orthogonal Multiple Access,NOMA） 我們知道 3G 采用直接序列碼分多址（Direct Sequence CDMA ，DS-CDMA） 技術(shù)，手機(jī)接收端使用 Rake 接收器，由于其非正交特性，就得使用快速功率控制 （Fast transmission power control ，TPC)來(lái)解決手機(jī)和小區(qū)之間的遠(yuǎn)-近問(wèn)題。 而 4G 網(wǎng)絡(luò)則采用正交頻分多址（
標(biāo)簽：
5G
上傳時(shí)間：
2022-02-25
上傳用戶(hù)：20125101110
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溫度控制如今已成為當(dāng)代社會(huì)研究的熱點(diǎn)之一,而溫度檢測(cè)在現(xiàn)代設(shè)備參數(shù)檢測(cè)中也是一項(xiàng)極其重要的技術(shù),應(yīng)用十分廣泛。與傳統(tǒng)的測(cè)溫方法相比,紅外測(cè)溫方法具有時(shí)間短、精度高、使用簡(jiǎn)單方便等優(yōu)點(diǎn)。本文以環(huán)境溫度為被測(cè)對(duì)象,設(shè)計(jì)了以STC89C52單片機(jī)為控制中心的紅外測(cè)溫裝置,能夠?qū)崿F(xiàn)對(duì)目標(biāo)溫度的實(shí)時(shí)采集、處理、顯示和報(bào)警等功能。本設(shè)計(jì)主要是由STC89C52單片機(jī)、紅外測(cè)溫傳感器、LCD1602液晶顯示器、按鍵和蜂鳴器等部分組成,采用非接觸的方式對(duì)目標(biāo)溫度進(jìn)行實(shí)時(shí)檢測(cè)。Temperature control has become one of the hotspots in contemporary social research,and temperature detection is an extremely important technology in modern equipment parameter detection.Compared with traditional method,the infrared temperature measuring method has advantages of short time,high precision and convenient operation,etc.This paper consider environment temperature as research objects and designs an infrared temperature measuring device which employs the STC89C52singlechipas-control center,and it can realize timely collection,processing,display and alarm function of the target temperature.The design is mainly composed of STC89C52 singlechip,infrared temperature sensor,LCD1602monitor,keys and buzzer,etc.This design detects the target temperature by non-contact method.
標(biāo)簽：
單片機(jī)
紅外測(cè)溫
上傳時(shí)間：
2022-03-27
上傳用戶(hù)：jiabin
-
本系統(tǒng)基于STM32單片機(jī)設(shè)計(jì)的非接觸式電流檢測(cè)控制系統(tǒng),通過(guò)OPA548片將所給任意信號(hào)放大,由100Ω電阻和INA128芯片進(jìn)行電流電壓轉(zhuǎn)換放大后,利用STM32單片機(jī)對(duì)獲取的電壓信號(hào)以0.488μs頻率采樣,利用STM32單片機(jī)的FFT庫(kù),獲得信號(hào)的諧波信息。測(cè)量電流信號(hào)精準(zhǔn),該設(shè)計(jì)可廣泛應(yīng)用在以STM32單片機(jī)為核心控制器件的新型儀表中,性能精準(zhǔn)且抗干擾能力強(qiáng)。This system is a non-contact current detection and control system based on STM32 single chip microcomputer. It amplifiesany signal through OPA548 chip, converts and amplifies the current and voltage by 100 Ω resistance and INA128 chip. The obtainedvoltage signal is sampled at the frequency of 0.488 μs by STM 32 single chip microcomputer, and the harmonic information of the signalis obtained by the FFT library of STM 32 single chip microcomputer. The measurement of current signal is accurate. This design can bewidely used in a new instrument with STM 32 single chip microcomputer as its core control device, with accurate performance and stronganti-interference capability.
標(biāo)簽：
stm32
單片機(jī)
上傳時(shí)間：
2022-03-27
上傳用戶(hù)：
