基于Schwarz-Christoffel变换的平板电容器电场电荷分布仿真

本文利用施瓦兹-克里斯多菲（S-C）变换,得出并讨论了计及边缘效应的平行板电容器的电场、电荷分布函数.利用离散化与数值迭代的方法,通过Matlab数值仿真得出了其电场和电荷分布的较精确的可视化结果.     

紧凑的非链式脉冲HF激光器

研究了气体组分和峰化电容对紫外光预电离脉冲HF激光器性能的影响.实验发现最佳气体混合比为SF₆/C₂H₆=20:1,峰化电容和主放电电容的最佳比为C_p/C_s=0.3,在最佳气体混合比时,最大激光脉冲峰值功率和对应的总气压随充电电压的提高而增大.同时得到了E/P值和激光能量的关系.整个器件的最大激光输出为400mJ,脉冲峰值功率为1.5MW,最大电光转换效率约为2.2%.     

铯原子永久电偶极矩实验研究

圆柱形电容器中充铯蒸气,测量不同温度下电容量的变化,这变化与铯原子数度成正比。本实验得出铯原子永久电偶极矩edCs>2.4e×10-8cm。     

An adaptive local grid refinement and peak/valley capture algorithm to solve nonlinear transport problems with moving sharp-fronts

Highly nonlinear advection–dispersion-reaction equations govern numerous transport phenomena. Robust, accurate, and efficient algorithms to solve these equations hold the key to the success of applying numerical models to field problems. This paper presents the development and verification of a computational algorithm to approximate the highly nonlinear transport equations of reactive chemical transport and multiphase flow. The algorithm was developed based on the Lagrangian-Eulerian decoupling method with an adaptive ZOOMing and Peak/valley Capture (LEZOOMPC) scheme. It consists of both backward and forward node tracking, rough element determination, peak/valley capturing, and adaptive local grid refinement. A second-order tracking was implemented to accurately and efficiently track all fictitious particles. Shanks’ method was introduced to deal with slowly converging case. The accuracy and efficiency of the algorithm were verified with the Burger equation for a variety of cases. The robustness of the algorithm to achieve convergent solutions was demonstrated by highly nonlinear reactive contaminant transport and multiphase flow problems.     

岩体中非填实爆炸空腔壁振动状态分析

采用流体动力学模型研究了地下空腔中化学爆炸冲击波的传播过程及空腔壁的运动状态。计算中体现了空气冲击波与空腔壁作用后激发的强谱振幅高频冲击波。在实验中 ,解决了空腔内传感器的防护和抗干扰等技术难题 ,测到了空腔壁的地运动加速度波形。通过对所测波形的时频域分析得出了非填实爆炸在源区和近区激发高频应力波 ,其频率明显高于填实爆炸的频率。这些特征与数值计算相一致。最后简略讨论了数值计算与实验测量中需解决的问题。     

碳基双电层电容器的结构、机理及研究进展

活性炭基双电层电容器是一种新型电化学能量储存装置,其储电机理是利用电极材料比较大的比表面积在电极和电解液之间形成双电层储存电荷,充放电过程中无化学反应发生。活性炭材料由于具有较大的比表面积、良好的孔结构分布、化学惰性表面等,一直是双电层电容器电极的首选材料。本文简要介绍了双电层电容器的制造工艺、应用及发展趋势。     

非平行板电容器电容和电场的一种计算

运用复变函数把非平行反电容器转换成平行板电容器来计算电容和电场强度,方法比较简便。     

电容器工作时的热效应

用热力学第一定律给出电容器在工作时产生的热效应。     

A Probe Design for the Acquisition of Homonuclear, Heteronuclear, and Inverse Detected NMR Spectra from Multiple Samples

A new probe design is presented for obtaining homonuclear, heteronuclear, and inverse detected NMR spectra from more than one sample in the same total data acquisition time as for a single sample, thus increasing data acquisition efficiency. Specifically, a two-coil system, with each solenoidal coil impedance matched to 50 Omega at both proton and nitrogen frequencies, has been designed for operation at 11.7 T with an observe volume of 15 microL for each coil. Isolation between the two frequencies for each individual coil, and at each frequency between coils, was greater than 30 dB. Two-dimensional COSY and HMQC spectra were obtained with negligible NMR cross-talk between the two coils.     

多孔Co(OH)2的制备及其超电容特性

多孔Co(OH)2的制备及其超电容特性;多孔氢氧化钴;电化学电容器;超电容