自适应光学系统MEMS微变形镜的研究

指出了传统变形镜研究所面临的瓶颈，以及采用MEMS技术研究微变形镜的优点．介绍了利用静电力驱动的平板电容式分立式微变形镜．分析结果表明它具有比传统变形镜更优越的性能．指出了进一步研究与发展MEMS微变形镜还需要解决的若干重要问题．     

Interactions Between Study Task, Study Time, and the Low-Frequency Hit Rate Advantage in Recognition Memory.

In studies of episodic recognition memory, low-frequency words (LF) have higher hit rates (HR) and lower false alarm rates (FAR) than do high-frequency words (HF), which is known as the mirror pattern. A few findings have suggested that requiring a task at study may reduce or eliminate the LF-HR advantage without altering the LF-FAR effect. Other studies have suggested that the size of the LF-HR advantage interacts with study time. To explore such findings more thoroughly and relate them to theory, the authors conducted 5 experiments, varying study time and study task. The full mirror pattern was found only in 2 cases: the standard condition requiring study for a later memory test and a condition requiring a judgment about unusual letters. The authors explain their findings in terms of the encoding of distinctive features and discuss the implications for current theories of recognition memory and the word frequency effect. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

功率集成电路中过热保护电路的设计

过热保护电路对于功率集成电路而言无疑是十分重要的。在集成电路中的过热保护电路一般利用二极管、三极管的温度特性来做传感器。阐明这种电路的优缺点、工作原理,并对其进行分析。该保护电路主要应用于功率集成电路中,也可以应用于一般的数字或模拟芯片中。     

硅藻土胎模成形刀具设计

通过硅藻土胎模的加工实践,分析了硅藻土特点及其切削性能,设计了加工硅藻土胎模成型曲面的成形刀具,不但提高了胎模加工表面的质量,而且使硅藻土胎模成型曲面的加工效率提高了几十倍。     

长距离伪斜机头旋转开采技术研究

针对负伪斜状态下综采工作面机头旋转开采过程中存在的问题，通过对工作面1号支架进行精确定位安装、采取合理的调斜和进刀方式等技术工艺，解决了负伪斜旋转开采过程中工作面支架和输送机容易下窜的技术难题。该技术的成功应用，提高了工作面的采出率，为综采工作面旋转机头开采提供了技术参考。     

Performance evaluation of an acrylic mirror booster solar still for neera concentration in jaggery-making industry

A single-basin solar still was constructed from locally available materials to concentrate palm tree juice (neera) for jaggery-making application. The performance of the still was tested with and without an acrylic mirror booster on both partially cloudy and clear sunshine days. About 73% of water content from neera was evaporated within 2 days by using the mirror booster technique in clear sunshine days. Distilled water of about 7.26 l was extracted from 10 l of neera with the mirror booster condition. Wind velocity showed a considerable effect on neera juice temperature and water vapour temperature during partially cloudy conditions. The calculated efficiency of the still with the mirror booster technique was 36.53% in clear sunshine conditions. The calculated energy conservation for the neera concentration process by using the mirror booster solar still was about 16408 kJ.     

再析纺纱时钢丝圈在钢领上位置倾侧

进一步叙述在离心力分量FMy不略去时钢丝圈平面空间位置,它在坐标平面x'Ay'上迹线u的倾角κ0,并且∠κ=∠δ;经实例计算,钢丝圈平面的位置角δ较小。但已说明了纺纱时钢丝圈外脚超前。钢丝圈平面在坐标平面y'Az'上迹线w的倾角χ表明它呈整体前倾,导致钢丝圈纱线通道高度减小。分析钢丝圈上纱作用点J的坐标比q/s得出,质心高度低、圈形小的钢丝圈前倾大,纱线通道小。至于钢丝圈外倾角τ,它是钢丝圈几何图形在坐标平面x'Az'上投影对于轴Az'形成的,可直接从动态图上测量得。指出:纺纱时钢丝圈外倾是不可避免的,其质心坐标c应由气圈纱张力及形状确定之;按τ和c/a算出的τ0v将是角τ0的最小值;角τ0可从钢丝圈和钢领呈弧面接触,钢丝圈下腿圆弧半径须为r1的条件确定;掌握"圈径"概念对钢丝圈和钢领设计和使用非常有利,应注意圈径长度A0M0≌AMv,每只钢丝圈都有属于自己的圈径A0M0,其斜度和长度已被确定而成为技术特征数。     

Principle of a two-output-difference interferometer for removing the most important interference distortions

This paper presents a two-output-difference interferometer for removing the most important interference distortions caused by nonlinear detectors. These distortions can be removed not only because the resulting interferogram is composed of the difference between the signals of the two detectors, but also because the modulated signals at each output have the same amplitude and opposite phases. Due to the use of two corner-cube mirrors fixed as a single moving element, the tilt and shearing problem will disappear. The effect of the corner-cube mirror deviation angle and the plane mirror tilt angle are investigated in detail, and the formulas of their tolerance are derived by means of modulation depth and phase error. The advantage of the interferometer enables it to be suitable for Fourier transform spectrometers.     

极紫外啁啾多层膜反射镜的拟合分析

设计并制备了极紫外啁啾多层膜反射镜,利用同步辐射反射率测试装置完成了样品反射率的测试,采用单纯形算法拟合了反射率测试曲线,分析了顶层Si的氧化对拟合结果的影响.拟合结果表明,2块样品的Si-on-Mo粗糙度为0.4 nm和0.5 nm,Mo-on-Si粗糙度为0.8 nm和0.9 nm,顶层Si的氧化是影响极紫外啁啾多层膜反射镜反射率的重要因素.     

射流倾斜角度对热轧无缝钢管冷却均匀性的影响

为了获得射流倾斜角度对热轧无缝钢管冷却效率及均匀性的影响规律,运用Fluent软件对单股倾斜射流冲击冷却热轧无缝钢管的流动特点及传热特性进行了有限元模拟。研究了不同射流倾斜角度下无缝钢管表面剪切力、湍流动能及压力分布特点,并获得冲击点处热流量及钢管1/2厚度处温度的变化曲线。结果表明,射流倾斜角度对钢管表面剪切力、湍流动能及温度分布具有显著的影响;随着射流倾斜角度的增加,钢管表面剪切力及湍流动能非对称性逐渐增加,且在顺流方向3°附近出现最大值;从钢管1/2厚度处温度分布发现,随着射流倾斜角度的增加,换热效率及温度均匀性得到了改善,先升高后降低;通过标准差计算,当入射角θ=10°时,冲击点两侧温度均匀性最佳。