AX522 1SAP250000R0001

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選擇深圳長欣,選擇放心,售后無憂
大量現(xiàn)貨,當天順豐發(fā)貨!
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描述

AX522 1SAP250000R0001

?OSD將來會從HPC存儲過渡成主流的企業(yè)級存儲嗎?我們拭目以待。試想,當年SUN公司的NFS不就是從最早的技術環(huán)境走到主流商業(yè)應用的最前線的嗎?
? ? 對象存儲成為主流
? ? 無論OSD是從HPC走到企業(yè)級應用中,或是通過其他方式,均面臨需要被企業(yè)級的用戶所接受這樣的事實。從傳統(tǒng)的存儲變成OSD存儲,需要在多個層面上作改變,這包括,存儲設備,存儲網絡,文件系統(tǒng)和數(shù)據(jù)庫。
? ? OSD面臨著巨大的機遇。如GarthGibson博士所講,大規(guī)模并行數(shù)據(jù)存儲的問題通過數(shù)據(jù)對象,和屬性可以得到解決。在這個時候,對象存儲的特性才得以發(fā)揮。而這些都是基于塊的存儲所不能解決的。
? ? 對象存儲可以以這種方式使用而與應用無關。應用系統(tǒng)可以和以前使用文件導向的系統(tǒng)一樣使用,所有的工作通過文件系統(tǒng)實現(xiàn)對文件的存取。這個時候,應用直接存儲數(shù)據(jù)對象而不是向文件系統(tǒng)寫數(shù)據(jù)。
? ? 對象存儲自誕生的那一天起已經表現(xiàn)出其巨大的活力,它可以提供數(shù)據(jù)安全,容易的數(shù)據(jù)共享,強大的可擴展功能,完全具備走向企業(yè)級數(shù)據(jù)中心的能力。我們很高興地看到,對象存儲的國際標準已經制定,很多全球一線的存儲廠商和服務器廠家均加入到此陣營中。各個廠家的對象存儲產品已經或即將面世。但是,同時我們也看到,對象存儲全面取代傳統(tǒng)的塊存儲還需時日。

產品承諾:
保?證?全新原裝進口,
保?證?安全準時發(fā)貨,
保?證售后服務質量,
優(yōu)勢價格,大量現(xiàn)貨。

主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
品牌:ABB???,AB??,GE,FOXBORO,本特利,英維思,伍德沃德,西屋,瑞恩,施耐德,西門子,摩托羅拉,安川。力士樂。ACSO,橫河等進口品牌。 專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊
Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA
? 專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質保 大量現(xiàn)貨? 國內實力庫存商家

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NetApp DSX-7.0TB-R5-C DS14MK2-AT 14 X267A-R5 500GB SATA
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IBM N3700 NETAPP FAS270 Controller Module Filer Head

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專業(yè)銷售進口DCS? PLC系統(tǒng)備件模塊

PLC模塊,可編程控制器,CPU模塊,IO模塊,AI模塊,通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅

15天包退換 一年質保 大量現(xiàn)貨? 國內實力庫存商家


選擇深圳長欣,選擇放心,售后無憂大量現(xiàn)貨,當天順豐發(fā)貨!
主營:本特利,英維思,伍德沃德,福克斯波羅、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

先介紹幾點經驗。
1、先通讀一遍“系統(tǒng)手冊”(不管能不能看懂,先了解個大概,以便學習編程時查找);
2、由位控邏輯入手,逐漸增加定時、計數(shù)等條件,把或、與、非關系理順;
3、進而練習整數(shù)運算、實數(shù)運算、類型轉換;
4、量程轉換、PID調節(jié)回路的建立及P、I、D參數(shù)的理解(最好是有個物理回路驗證,比如變頻器+電機+測速傳感器);
5、循環(huán)、順序、跳轉等程序控制(盡量避免跳轉,非跳不可時也是跳的越近越好);
6、中斷、通訊、位置控制....

本人以ABB工業(yè)機器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅動器系列為主攻。各位電工朋友可根據(jù)自己的條件選擇適合自己的PLC品牌,由于PLC的基本框架大同小異,學會一種至于其它的學習起來也就簡單了。