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1.
The plasma parameters of planar-type surface-wave plasmas (SWPs) are diagnosed based on the resonant excitation of surface plasmon polaritons (SPPs).The plasma parameter distributions are obtained by changing the discharge conditions of gas pressure and incident power.The measured experimental results show that the plasma near the heating layer is excited by surface waves of SPPs while the plasma located downstream originates from diffusion Moreover,the influence of high-frequency oscillations plays a significant role in producing the proposed SWPs with bi-Maxwellian electron energy distributions.  相似文献   
2.
把基于Haar小波的时域多分辨分析(MRTD)推广到Haar小波包,扩展了基函数的选择范围,导出了一维小波包MRTD(WP-MRTD)的时间迭代格式,并给出WP-MRTD与传统FDTD的接口算法.计算结果显示,用小波包基作为电磁场展开函数和小波基相比可以获得能量更集中的展开系数,有利于进一步提高计算效率;对于给定级数的小波包二叉树,存在一个最佳小波包基,使得计算效率最高.该方法可直接推广到二维和三维问题.  相似文献   
3.
The propagating behaviours, i.e. phase shift, transmissivity, reflectivity and absorp- tivity, of an electromagnetic (EM) wave in a two-dimensional atmospheric pressure plasma layer are described by the numerical solutions of integral-differential Maxwell's equations through a generalized finite-difference-time-domain (FDTD) algorithm. These propagating behaviours are found to be strongly affected by five factors: two EM wave characteristics relevant to the oblique incident and three dimensionless factors. The two EM wave factors are the polarization mode (TM mode or TE mode) and its incident angle. The three dimensionless factors are: the ratio of the maximum electron density to the critical density no/nor, the ratio of the plasma layer width to the wave length d/λ, and the ratio of the collision frequency between electrons and neutrals to the incident wave frequency veo/f.  相似文献   
4.
Investigation of the energy confinement in ohmic and lower hybrid current drive (LHCD) plasmas in HT-7 has been performed. In ohmic discharges at low densities the global energy confinement time rE increases almost linearly with the density, saturates at a critical density (2.5×10^13/cm^3 for HT-7) and is nearly constant at higher densities. The energy confinement time is in good agreement with the Neo-Alcator scaling law at different densities and currents. In the LHCD plasmas the global energy confinement time similar to that of the L-mode discharges has been observed to be in good agreement with the low confinement mode (L mode) scaling law of ITER89-P in higher electron density and plasma current.  相似文献   
5.
超颖材料的奇异特性和近几年的研究进展使该材料成为人们研究的重点,其发展前景引起了学术界,产业界,尤其是军方的无限遐想。针对超颖材料在隐身方面的应用对其基本特性和实验成果进行了总结,并对该材料在隐身和其它方面的应用前景进行了描述。  相似文献   
6.
This article presents hydrodynamics simulation of multi-steady states and mode transition by DC-beam-injected gas discharge, and provides a model approach to hysteresis and distinct forms of multi-steady states. The critical transition conditions of the three discharge modes (temperature limited mode, Langmuir mode, and space charge limited mode) are estimated to be dependent on the gas pressure and the filament temperature. Various forms of the multi-steady states in gas discharge can be uniformly explained by the displacement of the mutant positions.The simulation results are in a good agreement with those of the experiments.  相似文献   
7.
AZO透明导电薄膜的制备技术及应用进展   总被引:4,自引:5,他引:4  
概述了国内外AZO透明导电薄膜的多种制备技术和开发应用进展。详细介绍了磁控溅射、溶胶-凝胶、脉冲激光沉积、真空蒸镀、化学气相沉积等工艺在AZO薄膜制备中的研究现状,并且在对AZO膜与ITO膜性能比较的基础上,指出AZO薄膜的产业化前景好。  相似文献   
8.
概述了用于电容器储能的新型绝缘材料的国内外研究现状,介绍用于提高绝缘材料介电性能的新方法,即低温等离子体技术。从低温等离子体的化学活性出发,重点阐述了可以用于制备、改性绝缘材料的不同等离子体技术和这些技术的发展前景。  相似文献   
9.
10.
基于磁开关的高压高频脉冲陡化电路的设计   总被引:1,自引:0,他引:1  
根据磁开关技术和磁脉冲压缩的原理,设计了一种高压高频脉冲陡化电路。该电路将峰值5 kV、重复频率5 kHz的电压脉冲进行陡化,使其脉冲上升沿由50μs陡化为40 ns。分析了磁开关陡化脉冲的原理和设计方法,并建立了电路的PSPICE仿真模型,仿真结果表明,磁开关可有效陡化高压高频脉冲。  相似文献   
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