(adsbygoogle = window.adsbygoogle || []).push({}); 本实用新型公开了一种激光雕刻机的运动机构,包括主动运动机构,从动运动机构,激光头运动机构,第一方向导轨,第二方向运动导轨和支撑框架,第一方向运动导轨为两条,分别固定在支撑框架相对平行的两边框上,主动运动机构和从动运动机构分别设置在一条第一方向...
日期:2014-09-03 浏览:1542次 阅读全文
(adsbygoogle = window.adsbygoogle || []).push({}); Different levels of theoretical methods have been used to study a novel stable cyleophane 1,8- [1,8-naphthalenediylbis(4'.4-biphenyldivl)] naphthalene. It was concluded that HF/3-21g* was the most efficient method for the system, which could...
日期:2014-09-03 浏览:870次 阅读全文
(adsbygoogle = window.adsbygoogle || []).push({}); Using first-principles density functional calculations, we investigated work functions (WFs) of thin double-walled nanotubes (DWNTs) with outertube diameters ranging from 1 to 1.5 nm. The results indicate that a work function change within t...
日期:2014-09-03 浏览:896次 阅读全文
(adsbygoogle = window.adsbygoogle || []).push({}); The structural, energetic and electronic properties of carbon nanobuds (CNBs) with the smallest fullerene C20 covalently attached to the sidewall of single-walled carbon nanotubes (SWNTs) are studied by first-principles calculations. Due to ...
日期:2014-09-03 浏览:884次 阅读全文
(adsbygoogle = window.adsbygoogle || []).push({}); 本实用新型公开了一种可升降加热器,包括传送杆,载物台,加热器和丝杠,加热器和丝杠的顶部固定连接,加热器的顶部设置有斜槽和深槽,载物台用于承载样品,载物台的底部设置有弹性定位销,侧面设置有一对侧面定位销,加热器与载物台是通过弹性定位销与斜槽和...
日期:2014-09-03 浏览:1488次 阅读全文
(adsbygoogle = window.adsbygoogle || []).push({}); Atomic layer deposition (ALD) technology is a self-limiting ultrathin film deposition method. In ALD reactions, the reaction temperature plays a key role. And generalized predictive control (GPC) algorithm is adopted to control the temperatur...
日期:2014-09-03 浏览:871次 阅读全文
(adsbygoogle = window.adsbygoogle || []).push({}); Probe-based memory devices using ferroelectric media have the potential to achieve ultrahigh data-storage densities under high write-read speeds. However, the high-speed scanning operations over a device lifetime of 5-10 years, which correspo...
日期:2014-09-03 浏览:859次 阅读全文