助手标题
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
共[2832]条 当前为第1条到20条[由于搜索限制,当前仅支持显示前5页数据]
 

相关语句
the beam
Two plane-parallel wettable plates are immersed in the liquid in symmetrical positions with respect to the point of incidence of the beam on the liquid.
      
If detected, at the same geocentric distances (2-4RE) the "continuum" demonstrated a strongly variable and perturbed character, as well as a considerably larger extension of the beam over the geomagnetic latitude (10°-20° and more).
      
It examines the effect of the field of the beam and of the inherent volumetric charge of the tag on the results of the measurements; the conditions under which this effect can be neglected are calculated.
      
Experiments show that under these conditions the direct flow hardly goes beyond the limits of the beam.
      
Inflow into the main stream takes place at every point on the lateral surface of the beam [7], with the possible exception of the region near the emitter where the acoustic field is substantially nonuniform [8].
      
It is also assumed that the acoustic streaming does not affect the parameters of the sound wave within the beam.
      
The fluid is assumed to be ideal and incompressible and its flow symmetric; the lateral bending of the beam is described by the Euler equation.
      
The stresses and strains arising in the beam and at its ends during impact are found.
      
Solutions of the dispersion equation are given for all positions of the emitting surface (arbitrary, vertical, horizontal, and critical when one of the beam propagation directions is collinear with the emitting surface).
      
The difference between the beam-coupling gain coefficient Γ and the absorption coefficient α increases at 647 nm from 217 to 361 cm-1 with the increasing strength of a constant electric field E0 applied to the layer from 16 to 123 V/μm.
      
The net internal gain (difference between the beam-coupling gain coefficient Γ and the absorption coefficient α) was Γ - α = 143 cm-1 under these conditions.
      
Therefore, the beam-coupling gain coefficient Γ and the net gain Γ-α have low values, which are 53 and 42 cm-1, respectively, at 115 V/μm.
      
An analysis of the photorefractive characteristics showed that the admixture of fullerene C60 in an amount of 3 wt % to the PVK composite with 0.26 wt % SWNT leads to a twofold increase in the beam-coupling gain coefficient.
      
In the PVK-matrix composite containing 0.26 wt % SWNT and 3 wt % C60, the beam-coupling gain coefficient Γ of a 1550-nm laser beam and the net gain Γ-α are 32 and ~27 cm-1, respectively, at a constant field of E0 = 140 V/μm.
      
It is concluded that the growth of thickness of these layers is primarily caused by the spread of the beam energy density from pulse to pulse and by the presence of individual pulses with a higher-than-average value of energy density.
      
The Simulation of a Beam-Plasma Discharge with the Beam Current Exceeding the Limiting Vacuum Current
      
Results are given of simulation of the space-time dynamics of a beam-plasma discharge with the beam current exceeding the limiting vacuum current.
      
The method is based on the effect of capture of a high-current relativistic electron beam under conditions of significant overcompensation of space charge of the beam by positive background ions.
      
The method is based on the effect of capture of a high-current relativistic electron beam under conditions of significant overcompensation of space charge of the beam by positive background ions.
      
Analytical methods are used to obtain the criterion defining the boundary between the beam and hydrodynamic modes of motion of electrons in uniform and nonuniform electric fields for Townsend and high-voltage glow discharges.
      
 

首页上一页12345下一页尾页 

 
CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社