磁盘基片镜面车削技术的研究

本文阐述了计算机铝合金磁盘基片的镜面车削技术。讨论了影响磁盘基片加工精度及粗糙度的主要因素以及有关磁盘加工车床，金刚石车刀，工件材质，工作环境和切削条件等方面的问题。     

A mirror electron microscope for surface analysis

The principle of mirror microscopy has been adapted to provide a relatively low resolution surface microscope (<1000 ×), a large transfer width low energy electron diffractometer and a photoelectron analyser in k_|| space. A focused electron beam of ? 10 kV is decelerated through a Johansson lens, reflected in front of the sample and reaccelerated back through the lens to produce an electron image over a field of view of a few microns. The image can be interpreted as a micrograph of work function variations on the surface if other effects (geometry, magnetic field) are uniform. In the LEED mode, diffracted beams virtually retain their positions on the screen over the whole impact energy range used (0.160 V). Secondary electrons are preferentially focused around the lens-gun electro-optic axis, thus effectively filtering them out from the diffraction pattern. The design has an inherently large coherence length, of up to 10⁴ Å. Photoelectrons can similarly be imaged in k_|| space on the detector plane. The addition of energy filtering at the screen allows the two-dimensional Fermi surface to be imaged.     

人造多晶金刚石刀具的优越性及其加工镜面的反射率

实验研究了人造多晶金刚石刀具进行镜面加工的可能性及其镜面反射率的规律。     

金属基复合材料反射镜研究

复合材料镀镍通过研磨，能成为性能良好的反射镜．     

碳化硅轻量反射镜的超精密加工

运用在线电解磨削技术(ELID)加工大型碳化硅球面镜(口径ф360 mm),设计了一套专用的静压组合夹具用以抑制加工过程中因磨削力引起的工件变形.结合在线面形测量和基于误差补偿的补正加工方法,可以获得面形精度为P-V值0.8 μm、表面粗糙度为Ra7.8 nm的高质量碳化硅球面镜.     

《天花与热狗》和江南园林

通过分析一出英国戏剧所呈现的空间秩序,并联系其与江南园林①空间的相似之处,从体验入手,指出江南园林空间中镜池、粉墙与其他景观要素的结合能够形成镜像空间。镜像空间是江南园林中重要的空间原型,产生于空间的同体性或共时性。镜像空间原型不只与建筑空间有关,它还关联着心理层面。由于它从根本上影响人的自我认知,因此最终导致镜像成为一种艺术语言,反复出现在园林中。表达手段既有镜子、水池形成的镜面反射,也有因空间组织而形成的镜像体验。     

振镜式在线激光打标扫描方案的设计

论述了振镜式激光打标扫描方案的设计和实现过程 ,通过对振镜扫描速度的补偿解决了由于生产线的运动而造成的打标字符倾斜问题 ,并且有效提高了打标的速度 ,实现了在不同速度生产线对不同材质进行打标     

Real-time mirror steering for improved closed loop neoclassical tearing mode suppression by electron cyclotron current drive in DIII-D

The development and operation of the neoclassical tearing mode (NTM) avoidance and control system for DIII-D, which uses six sets of real-time steerable mirrors in order to move the electron cyclotron current drive (ECCD) deposition location in plasma, is described. The real-time DIII-D NTM control algorithm residing in the Plasma Control System (PCS) automatically detects an NTM by analysis of the Mirnov diagnostics, employs motional Stark effect (MSE) EFIT MHD equilibrium reconstruction to locate the rational q-surface where the NTM island can be found, then calculates the appropriate mirror position for alignment of the ECCD with the island using ray tracing. The control commands from PCS are sent to the electron cyclotron system to switch on and off or modulate the gyrotrons and to the steerable mirror system to move the steerable mirrors to the requested positions. Successful NTM suppression has been achieved in DIII-D using this control system to rapidly align the NTM island and the ECCD deposition location, and to actively maintain the alignment as plasma conditions change.     

以太网的双机热备份系统

本文介绍了双机热备份网络系统的硬件配置、工作原理和正确使用以及实现双机热备份StandbyServer软件的安装、测试和恢复。