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At present,the main control way in automation field are rlay control,microcomputer control and PLC control. Compared with the relay control system and the microcomputer control systerm, the PLC control systerm has a series of advantages, such as little work load of designing,installing,wiring and..
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古典園林與現(xiàn)代公園運(yùn)用比較學(xué)的方式，在基于中國(guó)傳統(tǒng)文化及美學(xué)思想建立的頤和園與基于現(xiàn)代消費(fèi)文化的主題游樂(lè)公園-歡樂(lè)谷之間進(jìn)行比較。分別對(duì)其背后的文化動(dòng)機(jī)和經(jīng)濟(jì)動(dòng)機(jī)進(jìn)行比較和分析，以及其藝術(shù)設(shè)計(jì)表現(xiàn)方式的不同，和審美意趣的不同進(jìn)行對(duì)比，深入探討在兩種文化背景下產(chǎn)生的景觀設(shè)計(jì)方式的不同之處。在經(jīng)典文化..
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1 介紹推動(dòng)數(shù)據(jù)庫(kù)系統(tǒng)發(fā)展的一個(gè)主要因素是，人們希望將一個(gè)企業(yè)的操作數(shù)據(jù)綜合起來(lái)并能提供對(duì)數(shù)據(jù)的受控訪(fǎng)問(wèn)，經(jīng)管綜合和受控訪(fǎng)問(wèn)意味著集中管理，但這并不是目的。實(shí)際上，計(jì)算機(jī)網(wǎng)絡(luò)的發(fā)展促進(jìn)了分散式的作業(yè)模式。這種分散的方式反映了許多公司的組織結(jié)果：在邏輯上分成多個(gè)分公司，部門(mén)，項(xiàng)目等，而在體制上分為辦..
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Abstract This is a study on underground tunnel ventilation for piston effects influenced by draught relief shaft. Field measurements of transient air movement in the draught relief shaft for a typical Taipei underground subway station were taken under winter and summer conditions. It has been fou..
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What it is:Electrically powered steering uses an electric motor to drive either the power steering hydraulic pump or the steering linkage directly. The power steering function is therefore independent of engine speed, resulting in significant energy savings.How it works :Conventional power steeri..
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Ali MadanipourDepartment of Architecture, Planning and Landscape, Newcastle University, Newcastle, United KingdomAvailable online 25 September 2006With a population of around 7 million in a metropolitan region of 12 million inhabitants, Tehran is one of the larger cities of the world. This paper ..
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1．緒論：在制作粒子加速器時(shí)的基本對(duì)準(zhǔn)問(wèn)題是改變工件的磁中心線(xiàn)與外部基準(zhǔn)之間的位置關(guān)系。這一步，是建立臨界基準(zhǔn)因?yàn)樗鼘?duì)于校正誤差十分重要。這個(gè)過(guò)程有兩種測(cè)量方法：1) 通過(guò)磁中心線(xiàn)建立機(jī)械中心線(xiàn)。2) 通過(guò)機(jī)械中心線(xiàn)建立外部基準(zhǔn)。下面我們會(huì)關(guān)注論第二種測(cè)量方法，介紹兩個(gè)斯坦福線(xiàn)性碰撞（SLC）的例子。2．目..
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1 Introduction Is a leading infraStructure Engineering design, design documents are the main basis for the construction, design quality is to determine the quality of the project the first part. My project quality accident statistics show that from the design of the project quality accident c..
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A: Fundamentals of Single-chip Microcomputer The single-chip microcomputer is the culmination of both the development of the digital computer and the integrated circuit arguably the tow most significant inventions of the 20th century [1]. These tow types of architecture are found in single-ch..
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關(guān)于PLC控制系統(tǒng)的----外文翻譯
地鐵隧道 釋壓通風(fēng)井影響下的活塞效應(yīng)通風(fēng)研究 -------- （外文翻譯）
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