AFCRL Atmospheric Absorption Line Parameters Compilation
標(biāo)簽： AFCRL Atmospheric Absorption Line Parameters Compilation
上傳時(shí)間： 2016-03-30
上傳用戶：xilong1393
DLMS 編輯 本詞條缺少名片圖，補(bǔ)充相關(guān)內(nèi)容使詞條更完整，還能快速升級(jí)，趕緊來(lái)編輯吧！ 配電線報(bào)文規(guī)范(Distribution Line Message Specification) [IEC 62056-53]是應(yīng)用層規(guī)范，獨(dú)立于應(yīng)用層以下的各個(gè)低層，因而也就與通信信道無(wú)關(guān)，設(shè)計(jì)用于在計(jì)算機(jī)集成環(huán)境中支持與（能量）分配設(shè)備間的消息交換，是由IEC TC57建立并以IEC 61334-4-41發(fā)布的國(guó)際標(biāo)準(zhǔn)。 中文名 配電線報(bào)文規(guī)范 外文名 Distribution Line Message Specification) 建立者 IEC TC57 應(yīng)用領(lǐng)域 于抄表、遠(yuǎn)程控制以及增值服務(wù)等 這個(gè)概念被進(jìn)一步發(fā)展成為設(shè)備語(yǔ)言報(bào)文規(guī)范，其目的在于為結(jié)構(gòu)化建模和儀表數(shù)據(jù)交換提供一個(gè)互操作環(huán)境，支持任何能量類(lèi)型如電、水、氣或熱的計(jì)量，應(yīng)用于遠(yuǎn)程抄表、遠(yuǎn)程控制以及增值服務(wù)
標(biāo)簽： IEC62056 DLMS COSEM
上傳時(shí)間： 2016-04-07
上傳用戶：auqaiss
Line Driver, 16sop, 5in-5out
上傳時(shí)間： 2016-07-06
上傳用戶：shijy
Dynasty 350, 700 208/575 Volt Models W/Auto-Line Maxstar 350, 700 File: TIG (GTAW) Including Optional Cart And Cooler CE And Non-CE Models
標(biāo)簽： Dynasty Maxstar 350 700
上傳時(shí)間： 2017-03-11
上傳用戶：zosoong
J1為L(zhǎng)ine input 5V，兩個(gè)104電容為濾波電容，引腳分別接地，主要濾掉高頻紋波，防止自激振蕩；47UF和100UF為濾波電容，主要濾掉低頻紋波；R1作限流作用以保護(hù)穩(wěn)壓二極管D2，當(dāng)輸入電壓和輸出負(fù)載電流發(fā)生變化時(shí)R1通過(guò)本身壓降的變化，來(lái)調(diào)節(jié)穩(wěn)壓二極管D2的工作電流，從而起到穩(wěn)壓作作用。
標(biāo)簽： VPCB 3.3 穩(wěn)壓電源 原理圖
上傳時(shí)間： 2017-07-29
上傳用戶：18826226223
ble Logic Controller，可編程邏輯控制器，一種數(shù)字運(yùn)算操作的電子系統(tǒng)，專(zhuān)為在工業(yè)環(huán)境應(yīng)用而設(shè)計(jì)的。它采用一類(lèi)可編程的存儲(chǔ)器，用于其內(nèi)部存儲(chǔ)程序，執(zhí)行邏輯運(yùn)算，順序控制，定時(shí)，計(jì)數(shù)與算術(shù)操作等面向用戶的指令，并通過(guò)數(shù)字或模擬式輸入/輸出控制各種類(lèi)型的機(jī)械或生產(chǎn)過(guò)程。是工業(yè)控制的核心部分。 另外PLC還有以下幾個(gè)名稱(chēng)： PLC = Power Line Communication，電力線通信，即我們俗稱(chēng)的“電力線上網(wǎng)”。 PLC = Public Listed Co
標(biāo)簽： 驅(qū)動(dòng)器
上傳時(shí)間： 2018-06-27
上傳用戶：454545
書(shū)中以4個(gè)面向來(lái)表現(xiàn)C++的本質(zhì)：procedural（程序性的）、generic（泛型的）、object-based（個(gè)別對(duì)象的）、object-oriented（面向?qū)ο蟮模珪?shū)圍繞著一系列逐漸繁復(fù)的程序問(wèn)題，以及用以解決這些問(wèn)題的語(yǔ)言特性。循此方式，讀者不只學(xué)到C++的函數(shù)和結(jié)構(gòu)，也會(huì)學(xué)習(xí)到它們的設(shè)計(jì)目的和基本原理
標(biāo)簽： Essential+C++
上傳時(shí)間： 2019-06-10
上傳用戶：wigen
In recent years, cellular voice networks have transformed into powerful packet-switched access networks for both voice communication and Internet access. Evolving Universal Mobile Telecommunication System (UMTS) networks and first Long Term Evolution (LTE) installations now deliver bandwidths of several megabits per second to individual users, and mobile access to the Internet from handheld devices and notebooks is no longer perceived as slower than a Digital Subscriber Line (DSL) or cable connection. Bandwidth and capacity demands, however, keep rising because of the increasing number of people using the networks and because of bandwidth-intensive applications such as video streaming. Thus, network manufacturers and network operators need to find ways to continuously increase the capacity and performance of their cellular networks while reducing the cost.
標(biāo)簽： BRINGING NETWORKS Beyond and 3G 4G
上傳時(shí)間： 2020-05-26
上傳用戶：shancjb
This books attempts to provide an extensive overview on Long-Term Evolution (LTE) networks. Understanding LTE and its Performance is purposely written to appeal to a broad audience and to be of value to anyone who is interested in 3GPP LTE or wireless broadband networks more generally. The aim of this book is to offer comprehensive coverage of current state-of-the-art theoretical and techno- logical aspects of broadband mobile and wireless networks focusing on LTE. The presentation starts from basic principles and proceeds smoothly to most advanced topics. Provided schemes are developed and oriented in the context of very actual closed standards, the 3 GPPP LTE.
標(biāo)簽： Performance LTE and its
上傳時(shí)間： 2020-05-27
上傳用戶：shancjb
Fordecades,microwavelineofsight(LOS)linkshavebeenoneofthebasictechnolo- gies used to build telephone networks. Until 1980, the fast rollout of high capacity transport networks and deployment of links in areas with challenging geographic characteristics could not be understood without this technology.
上傳時(shí)間： 2020-05-28
上傳用戶：shancjb
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