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聚合物的滲透率、溶度和擴散率測試技術回顧及應用
...sion, 2nd Ed., Oxford University Press, New York, 1975. 4. Amini, Mary A. Ph.D. and Morrow, Darrel R., Ph.D., Package Development and Systems, “Leakage and Permeation: Theory and Practical Applications”, May/June 1979, pp 20-27. 5. M.B. Huglin and M.B. Zakaria, Applied Macromolecular Chemistry and Physics, “Comments on Expressing the Permeability of Polym...
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電容型電流互感器現(xiàn)場介損測量方法分析
...電流互感器的絕緣介質(zhì)損耗因數(shù)的測量理論與實踐分析,提出在實際測量中減少工作量、提高工作效率的測量方法。關鍵詞:電容型電流互感器;介質(zhì)損耗因數(shù);測量 Abstract:Through theoretical and practical analyses on dielectric dissipation factor measuring methods of capacitive current transformer with positive and negative connecting modes, the authors propose an onsite m...
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現(xiàn)代水工業(yè)自動化必須走信息控制一體化的道路——兼談實用工業(yè)以
...t modernized and scientific automation control technology can help to construct new water enterprises of continuous economic benefit. Key words: Information control of integration Practical Ethernet Virtual technology Embedded technology Field network technology 1 水工業(yè)自動化面臨新的挑戰(zhàn) 城市上下水處理,工礦企業(yè)污水處理,城市樓群二次供水,上水水質(zhì)深度處理,...
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工業(yè)測量中的噪聲干擾問題
...誤差的能力。合理的線路板布線和采用信號調(diào)理措施將確保在噪聲環(huán)境中達到最高精度。結論問:什么是合理的安裝和布線?答:這里有幾點建議 。你也可以查閱“Design Tools”和ADI公司出版的書——“Practical Analog Design Techniques”,可從ADI公司購買此書或在網(wǎng)上免費查閱。應避免在電磁噪聲源(如斷路器、變壓器、電動機、可控硅整流器驅(qū)動器、焊接機、熒光燈控制器或繼電器)附近安裝敏...
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Practical制作出新的仿真元件電子版產(chǎn)品手冊
Practical Components新的產(chǎn)品手冊旨在幫助工程師迅速找到所需的主要產(chǎn)品,以檢驗產(chǎn)品質(zhì)量,培訓員工,實現(xiàn)業(yè)務增長。涉及PCB組裝、焊接和表面封裝技術的任何人都將從這一新的產(chǎn)品手冊中獲益。 據(jù)Practical公司總裁Kevin Laphen介紹,“在www.PracticalComponents.com網(wǎng)站上,我們新的電子產(chǎn)品手冊按封裝類型/類別排列,每種產(chǎn)品都帶有圖示、說明、無鉛元件和錫鉛元件的編號及配方和串聯(lián)方...
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