C語言接口與實現(xiàn),一本過于學(xué)術(shù)的書 body {background: #383838 !important;}::-webkit-scrollbar{height:10px !important; width:10px !important; overflow:visible !important;}::-webkit-scrollbar-button{height:0 !important; width:0 !important; display:none !important;}::-webkit-scrollbar-track{box-shadow:none !important;}::-webkit-scrollbar-track:hover{background-color:rgba(56, 56, 56, 0.03) !important; box-shadow:inset 1px 1px 0 rgba(56, 56, 56, 0.1), inset -1px -1px 0rgba(56, 56, 56, 0.1) !important;}::-webkit-scrollbar-track:active{background-color:rgba(56, 56, 56, 0.04) !important; box-shadow:inset 1px 1px 0 rgba(56, 56, 56, 0.14), inset -1px -1px 0 rgba(56, 56, 56, 0.14) !important;}::-webkit-scrollbar-thumb{background-clip:padding-box !important; background-color:rgba(56, 56, 56, 0.2) !important;}::-webkit-scrollbar-thumb:vertical{min-height:28px !important; box-shadow:inset 1px 1px 0 rgba(56, 56, 56, 0.1), inset -1px -1px 0 rgba(56, 56, 56, 0.1) !important;}::-webkit-scrollbar-thumb:horizontal{min-width:28px !important; box-shadow:inset 1px 1px 0 rgba(56, 56, 56, 0.1), inset -1px -1px 0 rgba(56, 56, 56, 0.1) !important;}::-webkit-scrollbar-thumb:hover{background-color:rgba(56, 56, 56, 0.6) !important; box-shadow:inset 1px 1px 1px rgba(56, 56, 56, 0.25), inset -1px -1px 1px rgba(56, 56, 56, 0.25) !important;}::-webkit-scrollbar-thumb:active{background-color:rgba(56, 56, 56, 0.7) !important; box-shadow:inset 1px 1px 3px rgba(56, 56, 56, 0.35), inset -1px -1px 3px rgba(56, 56, 56, 0.35) !important;}::-webkit-scrollbar-corner{background:trnasparent !important;}html::-webkit-scrollbar,body::-webkit-scrollbar{background: rgba(56, 56, 56, 0.5) !important;}body * {background-color: rgba(56, 56, 56, 0.44) !important;}* {color: #B6AA7B !important;}a:link,a:link *,a:link:hover,a:link:hover *,a:link:active,a:link:active * {color: #B6AA7B !important;}a:visited,a:visited *,a:visited:hover,a:visited:hover *,a:visited:active,a:visited:active * {color: #D9C077 !important;}#_maxthon_night_mode_mask{position:fixed !important; left:0 !important; right:0 !important; top:0 !important; bottom:0 !important;z-index:100 !important; opacity:0.22 !important; background:#383838 !important; pointer-events:none !important;}
標簽: c語言 接口與實現(xiàn)
上傳時間: 2015-12-13
上傳用戶:qq253363112
css美化有序列表,貼出部分css代碼 <ol > <li>先涂粉底再涂防曬</li> <li>先涂防曬再涂粉底</li> </ol> <!doctype html> <html> <head> <title>CSS3 ordered list styles - demo</title> <style> body{ margin: 40px auto; width: 500px; } /* -------------------------------------- */ ol{ counter-reset: li; list-style: none; *list-style: decimal; font: 15px 'trebuchet MS', 'lucida sans'; padding: 0; margin-bottom: 4em; text-shadow: 0 1px 0 rgba(255,255,255,.5); } ol ol{ margin: 0 0 0 2em; } /* -------------------------------------- */
上傳時間: 2018-08-22
上傳用戶:53660542
How will future generations refer to our times? Will it be known as one of space exploration, genetics, atomic energy or computing? Possibly, but I think it is more likely to be ‘The age of communications’. Not since printed books and newspapers were first introduced has there been such an explosion of communication. None of this technology could function without modern cables and, just as important, competent installers.
標簽: Applications Cabling Copper
上傳時間: 2020-05-27
上傳用戶:shancjb
With all the recent hype over radio frequency identification (RFID) and the requirements to implement it, you might think that RFID can turn water into wine, transform lead into gold, and cure the world’s diseases. You might also be worried that RFID will enable Big Brother to track your move- ments to within a foot of your location from a satellite five hundred miles up in space. The truth is, RFID can do none of these things. In this chapter, you find out the basics of what RFID is, what forces are dri- ving RFID as a replacement for the bar code in the marketplace, and what benefits RFID can offer
標簽: ForDummies_RFID_For_Dummies
上傳時間: 2020-06-08
上傳用戶:shancjb
mosfet并聯(lián)使用介紹了并聯(lián)使用的注意事項,特別注意避開Vgsth zero thermal coefficient以下的正溫特性設(shè)計
上傳時間: 2022-03-01
上傳用戶:bluedrops
華為AI安全白皮書2018-cn近年來,隨著海量數(shù)據(jù)的積累、計算能力的發(fā)展、機器學(xué)習(xí)方法與系統(tǒng)的持續(xù)創(chuàng)新與演進,諸如圖像識別、語音識 別、自然語言翻譯等人工智能技術(shù)得到普遍部署和廣泛應(yīng)用。越來越多公司都將增大在AI的投入,將其作為業(yè)務(wù)發(fā)展 的重心。華為全球產(chǎn)業(yè)愿景預(yù)測:到2025年,全球?qū)崿F(xiàn)1000億聯(lián)接,覆蓋77%的人口;85%的企業(yè)應(yīng)用將部署到 云上;智能家庭機器人將進入12%的家庭,形成千億美元的市場。 人工智能技術(shù)的發(fā)展和廣泛的商業(yè)應(yīng)用充分預(yù)示著一個萬物智能的社會正在快速到來。1956年,麥卡錫、明斯基、 香農(nóng)等人提出“人工智能”概念。60年后的今天,伴隨著谷歌DeepMind開發(fā)的圍棋程序AlphaGo戰(zhàn)勝人類圍棋冠 軍,人工智能技術(shù)開始全面爆發(fā)。如今,芯片和傳感器的發(fā)展使“+智能”成為大勢所趨:交通+智能,最懂你的 路;醫(yī)療+智能,最懂你的痛;制造+智能,最懂你所需。加州大學(xué)伯克利分校的學(xué)者們認為人工智能在過去二十年 快速崛起主要歸結(jié)于如下三點原因[1]:1)海量數(shù)據(jù):隨著互聯(lián)網(wǎng)的興起,數(shù)據(jù)以語音、視頻和文字等形式快速增 長;海量數(shù)據(jù)為機器學(xué)習(xí)算法提供了充足的營養(yǎng),促使人工智能技術(shù)快速發(fā)展。2)高擴展計算機和軟件系統(tǒng):近 年來深度學(xué)習(xí)成功主要歸功于新一波的CPU集群、GPU和TPU等專用硬件和相關(guān)的軟件平臺。3)已有資源的可獲得 性:大量的開源軟件協(xié)助處理數(shù)據(jù)和支持AI相關(guān)工作,節(jié)省了大量的開發(fā)時間和費用;同時許多云服務(wù)為開發(fā)者提供 了隨時可獲取的計算和存儲資源。 在機器人、虛擬助手、自動駕駛、智能交通、智能制造、智慧城市等各個行業(yè),人工智能正朝著歷史性時刻邁進。谷 歌、微軟、亞馬遜等大公司紛紛將AI作為引領(lǐng)未來的核心發(fā)展戰(zhàn)略。2017年谷歌DeepMind升級版的AlphaGo Zero橫 空出世;它不再需要人類棋譜數(shù)據(jù),而是進行自我博弈,經(jīng)過短短3天的自我訓(xùn)練就強勢打敗了AlphaGo。AlphaGo Zero能夠發(fā)現(xiàn)新知識并發(fā)展出打破常規(guī)的新策略,讓我們看到了利用人工智能技術(shù)改變?nèi)祟惷\的巨大潛能。 我們現(xiàn)在看到的只是一個開始;未來,將會是一個全聯(lián)接、超智能的世界。人工智能將為人們帶來極致的體驗,將 積極影響人們的工作和生活,帶來經(jīng)濟的繁榮與發(fā)展。
上傳時間: 2022-03-06
上傳用戶:
隨著光伏發(fā)電系統(tǒng)快速發(fā)展,以及電動汽車充電樁的普及,傳統(tǒng)的剩余電流保護器無法滿足實際需求。介紹了一款B型剩余電流保護器,采用磁調(diào)制剩余電流互感器和零序電流互感器采集剩余電流。根據(jù)GB/T 22794—2017標準要求,可識別1 kHz及以下的正弦交流、帶和不帶直流分量的脈動直流、平滑直流等剩余電流信號。經(jīng)信號調(diào)理電路將電壓信號送到單片機進行采集和判斷。通過試驗測試,該樣機在測試精度和速度上均符合國家標準的相關(guān)要求。The rapid development of photovoltaic power generation systems and the popularity of electric vehicle charging piles make the traditional residual current protective devices unable to meet the actual demand.This paper proposed a type B residual current protective device,which uses the magnetically modulated residual current transformer and the zero sequence current transformer to acquire the residual current.According to the requirements of GB/T 22794—2017,the type B residual current protective device can detect sinusoidal AC residual current of 1kHz and below 1kHz,pulsating DC residual current with and without DC component,smooth DC residual current and so on.The signal processing circuit sends the voltage signal to the MCU for acquisition and judgment.Through experimental tests,the device meets the relevant requirements of national standards in terms of test accuracy and speed.
標簽: 電流保護器
上傳時間: 2022-03-27
上傳用戶:
針對交流電路過零檢測電路存在結(jié)構(gòu)復(fù)雜、過零點檢測不準確、編程繁瑣等問題,設(shè)計了一種基于LM339的硬件結(jié)構(gòu)簡單的過零檢測電路。通過仿真軟件Mulisim對該設(shè)計電路進行了仿真,實驗證明了該方案過零檢測的可行性、穩(wěn)定性和可靠性,可直接作為交流電路中CPU的過零信號。Aiming at the problems of AC cilsuit zero crossing detection circuit such as complex structure, zero crossing detection and cumbersome programming, a zero crossing detection circuit with simple hardware structure based on LM339 was designed. The design circuit was simulated by simulation software Mulisim, and the feasibility, stability and reliability of zero crossing detection were proved by experiments, which can be used as zero crossing signal of CPU in AC circuit directly.
上傳時間: 2022-05-03
上傳用戶:
The JW? 7805 is a low noise low-dropout (LDO) voltage regulator with enable function that operates from 1.8V to 5.5V. It provides up to 300mA of output current and offers low-power operation in miniaturized packaging. JW7805 supports fixed output voltage 0.9V, 1.0V, 1.05V, 1.1V,1.2V, 1.3V, 1.35V, 1.5V, 1.8V, 1.85V, 2.1V, 2.2V, 2.3V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V,3.1V, 3.3V, 3.6V, 4.2V, 4.4V and 5.0V. The features of low quiescent current as low as 6uA and almost zero disable current are ideal for powering the battery equipment. JW7805’s low output noise and high PSRR are also friendly to RF systems.
標簽: JW7805
上傳時間: 2022-05-06
上傳用戶:slq1234567890
本文以感應(yīng)加熱電源為研究對象,闡述了感應(yīng)加熱電源的基本原理及其發(fā)展趨勢。對感應(yīng)加熱電源常用的兩種拓撲結(jié)構(gòu)-電流型逆變器和電壓型逆變器做了比較分析,并分析了感應(yīng)加熱電源的各種調(diào)功方式。在對比幾種功率調(diào)節(jié)方式的基礎(chǔ)上,得出在整流側(cè)調(diào)功有利于高頻感應(yīng)加熱電源頻率和功率的提高的結(jié)論,選擇了不控整流加軟斬波器調(diào)功的感應(yīng)加熱電源作為研究對象,針對傳統(tǒng)硬斬波調(diào)功式感應(yīng)加熱電源功率損耗大的缺點,采用軟斬波調(diào)功方式,設(shè)計了一種零電流開關(guān)準諾振變換器ZCS-QRCs(Zero-current-switching-Quasi-resonant)倍頻式串聯(lián) 振高頻感應(yīng)加熱電源。介紹了該軟斬波調(diào)功器的組成結(jié)構(gòu)及其工作原理,通過仿真和實驗的方法研究了該軟斬波器的性能,從而得出該軟斬波器非常適合大功率高頻感應(yīng)加熱電源應(yīng)用場合的結(jié)論。同時設(shè)計了功率閉環(huán)控制系統(tǒng)和PI功率調(diào)節(jié)器,將感應(yīng)加熱電源的功率控制問題轉(zhuǎn)化為Buck斬波器的電壓控制問題。針對目前IGBT器件頻率較低的實際情況,本文提出了一種新的逆變拓撲-通過IGBT的并聯(lián)來實現(xiàn)倍頻,從而在保證感應(yīng)加熱電源大功率的前提下提高了其工作頻率,并在分析其工作原理的基礎(chǔ)上進行了仿真,驗證了理論分析的正確性,達到了預(yù)期的效果。另外,本文還設(shè)計了數(shù)字鎖相環(huán)(DPLL),使逆變器始終保持在功率因數(shù)近似為1的狀態(tài)下工作,實現(xiàn)電源的高效運行。最后,分析并設(shè)計了1GBT的緩沖吸收電路。本文第五章設(shè)計了一臺150kHz,10KW的倍頻式感應(yīng)加熱電源實驗樣機,其中斬波器頻率為20kHz,逆變器工作頻率為150kHz(每個IGBT工作頻率為75kHz),控制孩心采用TI公司的TMS320F2812 DSP控制芯片,簡化了系統(tǒng)結(jié)構(gòu)。實驗結(jié)果表明,該倍頻式感應(yīng)加熱電源實現(xiàn)了斬波器和逆變器功率器件的軟開關(guān),有效的減小了開關(guān)損耗,并實現(xiàn)了數(shù)字化,提高了整機效率。文章給出了整機的結(jié)構(gòu)設(shè)計,直流斬波部分控制框圖,逆變控制框圖,驅(qū)動電路的設(shè)計和保護電路的設(shè)計。同時,給出了關(guān)鍵電路的仿真和實驗波形。
上傳時間: 2022-06-22
上傳用戶:
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