Stability of Tokamak Equilibrium with Internal Transport Barrier against High n MHD Ballooning Mode

Internal transport barriers （ITBs） are phenomena associated with improved confinement mode of tokamak plasmas. Within the region where the ITB locates, the plasma pressure has a large gradient while the magnetic shear s has a minimum so that within and near the ITB, the absolute value of the shear is very low. Physics involved is plentiful, from the macroscopic （ MHD ） stability, to the suppression of microscopic instabilities thought to be responsible for anomalous transport. The treatment of very low shear also poses some theoretical difficulties.     

自适应光学对大气扰动波前的补偿效果研究：I.理论推导

在采用冻结湍流假设和几何光学近似的条件下，得到了经自适应光学系统校正后的剩余波前相位扰动的结构函数，进而根据剩余相位结构函数与系统Ｓｔｒｅｈｌ比的关系，求出自适应光学系统的补偿效果受系统的时空传递函数，大气湍流，光波传播路径上的横向风，观察目标的旋转角速度以及系统时间延迟影响情况的解析表达式。     

大速差射流型双一次风通道通用煤粉主燃烧器

本文介绍了一种新型煤粉主燃烧器－双一次风通道通用煤粉主燃烧器。它既保留了大速差射流燃烧技术的优点，又彻底克服了燃烧器内容易局部结焦的缺点，从而由辅助燃烧器（或预燃室）发展成为主燃烧器。具有煤种适应性广，低负荷运行范围大，煤粉着火点位置可控等优点。     

基于CEEMDAN-MFO-RBF的风电功率短期预测

文中提出一种基于自适应噪声完整集成经验模态分解与飞蛾扑火算法优化径向基神经网络的短期风电功率预测方法.首先,利用自适应噪声完整集成经验模态分解对风电功率信号进行分解,以获得不同时间尺度的固有模态函数分量和剩余分量,该方法相较于经验模态分解与集成经验模态分解具有更好的收敛性和完整性.其次,利用飞蛾扑火算法优化径向基神经网...     

静态偏振风成像干涉仪中光在四面角锥棱镜中的传播规律研究

简述了自行设计的新型静态偏振风成像干涉仪的原理和四面角锥棱镜的分光机理;应用光线追迹法,推导出了主截面内任意光线在棱镜中的传播方向及出射点坐标,建立了平行光束经角锥棱镜后的偏向角和透过率的理论表达式;采用计算机模拟给出了偏向角和透过率随入射角的变化关系曲线;根据静态偏振风成像干涉仪的具体参数确定了四面角锥棱镜的侧面和底面夹角以及底边长度.该研究为静态偏振风成像干涉仪的研制提供了理论依据.     

新型静态偏振风成像干涉仪理论探测误差的分析与计算

简述了新型静态偏振风成像干涉仪的原理,推导出一般情况下系统的Jones矩阵.在此基础上计算了系统中各偏振器件重要参数在非理想情况下对风速和温度探测结果的影响.利用计算机模拟对探测误差进行了分析,并按照系统精度要求从理论上提出了各重要参数的误差容限.该研究为新型静态偏振风成像干涉仪的研制、定标及后期数据处理提供了理论依据. 关键词： 静态偏振风成像干涉仪 Jones矩阵 方位角误差 相位延迟量误差     

Effect of film thickness manganite-based on interfacial barrier of heterojunctions

Interracial barrier is a key factor that determines the performances of heterojunctions. In this work, we study the effect of manganite film thickness on the effective interracial barrier for La0.67Sr0.33MnO3/Nb：SrTiO3 junctions, The barrier is extracted from the forward current-voltage characteristics. Our results demonstrate that the barrier decreases gradually from -0.85 eV to -0.60 eV when the film thickness decreases from 150 nm to 2 nm. The overall value of the barrier is only about 50% of the corresponding one determined from the photovoltaic effect.     

A full resolution autostereoscopic 3D display based on polarizer parallax barrier

A full resolution autostereoscopic three-dimensional （3D） display prototype is developed. It is composed of a time division thin film transistor liquid crystal display panel with an optical controlled birefringence liquid crystal polarization switch and a polarizer parallax barrier. Fast driving circuits operating at 120-Hz frame rate are fabricated. The 3D images on the display have the same resolution as the corresponding two-dimensional images, which is significantly different from conventional parallax barrier autostereoscopic 3D displays having degraded 3D image resolution.     

Mobile Rayleigh Doppler wind lidar based on double-edge technique

<正>We describe a mobile molecular Doppler wind lidar(DWL) based on double-edge technique for wind measurement of altitudes ranging from 10 to 40 km.A triple Fabry-Perot etalon is employed as a frequency discriminator to determine the Doppler shift proportional to the wind velocity.The lidar operates at 355 nm with a 45-cm-aperture telescope and a matching azimuth-over-elevation scanner that provides full hemispherical pointing.To guarantee wind accuracy,a single servo loop is used to monitor the outgoing laser frequency to remove inaccuracies due to the frequency drift of the laser or the etalon.The standard deviation of the outgoing laser frequency drift is 6.18 MHz and the corresponding velocity error is 1.11 m/s.The wind profiles measured by the DWL are in good agreement with the results of the wind profile radar(WPR).Evaluation is achieved by comparing at altitudes from 2 to 8 km.The relative error of horizontal wind speed is from 0.8 to 1.8 m/s in the compared ranges.The wind accuracy is less than 6 m/s at 40 km and 3 m/s at 10 km.     

风速测量实验的设计与探究

基于电磁理论和空气动力学的相关知识,利用磁铁、金属棒和DISLAB传感器等器件设计并制作了风速测量系统,可准确地测量2-11级范围内的风速值.该装置还可作为演示电磁感应现象的设计型实验内容,实验过程中可加深学生对电磁感应现象的理解,并提高学生对matlab软件的应用能力.