Demonstration of Four Fundamental Operations of Liquid Droplets for Digital Microfluidic Systems Based on an Electrowetting-on-Dielectric Actuator

An electrowetting-on-dielectric actuator is developed, in which the liquid is sandwiched between top and bottom plates. For the bottom plate, silicon wafer is used as the substrate, the heavily phosphorus-doped polysilicon film is deposited by low pressure chemical vapour deposition as the microelectrode array, and thermally grown SiO2 film as the dielectric layer. The top p/ate is a glass plate covered with transparent and conductive indium tin oxide as the ground electrode. In addition, a Teflon AF1600 film is spun on the surface of both the plates as the hydrophobic layer. The experimental results show that when the gap height between two plates is 133μm, a prototype of the device is capable of creating, transporting, merging and dividing droplets of deionized water in an air environment with a 70V at lOHz voltage pulse. This is also established by simulations using the computational fluidic software of CFD-ACE＋.     

基于开关电流技术的小波变换的滤波器电路实现

提出基于开关电流技术的小波变换的滤波器电路实现方法. 小波变换的开关电流滤波器实现电路由冲激响应为高斯一阶导数及其膨胀函数的滤波器组构成. 开关电流滤波器的膨胀系数(尺度)通过控制宽长比(W/L)或时钟频率可得到精确地控制. Padé逼近是一种有效的有理逼近，小波函数经过Padé变换可以得到其有理分式逼近，十分利于其开关电流滤波器电路实现. 仿真结果证实了其可行性. 关键词： 小波变换 开关电流 滤波器 Padé逼近     

Propagation Effect of Hollow Gaussian Beams Passing through a Misaligned Optical System

A generalized formula of hollow Gaussian beams through the first-order misaligned ABCD systems is derived by using the generalized diffraction integral formula. It is shown that the hollow Gaussian beam passing through the misaligned system becomes a decentred hollow Gaussian beam. The propagation properties of the output beam are investigated when it propagates through a simple misaligned lens system. These results provide a powerful theoretical tool for applications of optical traps.     

一种适用于陀螺定向测量数据处理的滤波算法

一本文针对陀螺仪定向模型的特点，提出一种自适应卡尔曼滤波算法，实际应用表明，该算法能有效地对陀螺定向数据进行实时处理，既保证了观测精度，又缩短了观测时间。     

铁电体触发开关实验

目前超宽带中的高压开关技术正向着高气压、高重复频率、低抖动、快前沿方向发展。铁电体作为触发极具有触发电压低、抖动小的特点。用铁电体作为触发极开关在国际上已经受到人们越来越多的重视。为掌握铁电体作为触发极的工作性能，在充气和真空条件下开展了实验研究。     

中国餐馆过程中的最大餐桌

本文研究服从参数为（α，θ）的中国餐馆过程．我们应用和发展了Shepp在1966年的论文中关于随机排位图的思想，得到第r张大桌（根据人数多少排序）所占的比例的各阶渐近矩．     

含约束阻尼层的多层仪表板随机振动特性数值分析

在模态实验分析的基础上，建立一个五层仪表板的有限元模型，研究了其非线性振动特性，并通过随机振动试验验证了计算分析结果。     

六方AlN本征缺陷的第一性原理研究

用基于密度泛函理论平面波赝势法首先对六方AlN本征点缺陷(氮空位、铝空位、氮替代铝、铝替代氮、氮间隙、铝间隙)存在时的晶格结构进行优化，得到其稳定结构；然后通过各缺陷形成能的计算可得知其在生长过程中形成的难易程度；最后从态密度的角度对各种本征点缺陷引起的缺陷能级及电子占据情况进行了分析.发现除氮空位外其他本征缺陷在带隙中形成的能级都很深，要得到n型或p型AlN必须要引入外来杂质.计算得到的本征缺陷能级对于分析AlN的一些非带边辐射机理有重要帮助. 关键词： 六方AlN 形成能 缺陷能级 态密度