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
   first order mode 的翻译结果: 查询用时:0.01秒
图标索引 在分类学科中查询
所有学科
更多类别查询

图标索引 历史查询
 

first order mode
相关语句
  第一阶模态
     The validity of the prediction of NC spindle units dynamics is studied by FEM and experimental modal analysis. A conclusion is reached that the prediction of the first order mode of the spindle unit using elastic beam theory has high precision. It is drawn through the theoretical calculation and modal analysis of a standard spindle unit.
     采用有限元法和实验模态分析方法对用弹性梁理论预测数控机床主轴单元基本动特性的有效性进行研究.理论计算和实验模态分析结果表明,有限元弹性梁理论对具有短粗结构的主轴单元的第一阶模态具有很高的预测精度.研究结果为主轴单元的动态优化设计目标函数的确定打下实验基础
短句来源
  “first order mode”译为未确定词的双语例句
     The main factor that introduces asymmetry into the output of Y-branch or MMI structure is the first-order mode guided by them. A coupler in which the waveguides which can only guide the fundamental modes are located on both sides of the multimode waveguide is designed, and this coupler can filter out the first order mode guided by it.
     引入Y分支和多模干涉结构输出的不对称主要原因是这两种结构中产生了一阶导模 ,设计一种新的耦合器结构 ,在这个结构中 ,两根单模波导分别放置在一根多模波导两边 ,并且单模波导的传播常量与多模波导的一阶模的传播常量相同 ,这种结构可以将一阶导模滤除。
短句来源
     The bending vibration of the rotor system of a large hydraulic turbine was studied. First calculated the first order natural frequency and first order mode by the Finite Element method and Transfer Matrix method. The results of the first order natural frequency are 3.56 Hz and 3.72 Hz respectively.
     研究了某大型水轮发电机转子轴系弯曲振动.用有限元法和传递矩阵法分别计算了轴系的固有频率和振型,两种方法求得的系统第一阶固有频率为3.56Hz和3.72Hz;
短句来源
     The application of the negative damp zero network on the attitude control system of the first class for some launch vehicle showed that the system stability would be realized when the slope of first order mode shape near the mounting position of the rate gyro was positive.
     某运载一级姿控系统负阻尼零点校正网络的应用表明,可在速率陀螺安装处一阶振型斜率为正时实现系统的稳定。
短句来源
     Vibration mode analysis is by using commercial finite element software, and the analysis shows the sensitivity of the change ratio of the first order mode shape to the location and severity of structure damages.
     应用有限元程序进行模态分析,模态分析的结果表明第一阶振型改变率对不同位置和程度损伤的敏感性。
短句来源
     5) Three damage cases of the 10-storey shearing building are considered. Locations of damages can be identified using the method based on changes in slopes of first order mode shape.
     5)对于10 层剪切型框架结构数值模型所讨论的三种损伤工况,通过采用本文提出的改进的基于一阶振型斜率改变的结构损伤定位算法,成功地识别出了所有损伤位置。
短句来源
更多       
查询“first order mode”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  first order mode
We pick up this idea to vary the first-order mode output intensity ratios.
      
The total excess loss of the first-order mode in comparison to a 3m straight waveguide of equal length is 0.3 dB.
      
The peak of the zero-order mode is smaller in comparison to the first-order mode peak.
      
The intensities of the zero-order mode image A and first-order mode image B are uniformly split onto the output waveguides.
      
The method of multimode interference allows to convert a fundamental mode into a first-order mode.
      
更多          


In this paper we have given a numerical calculation and theoretical analysis of the lateral waveguide and the lateral mode selectivity, of the injected stripe-geometry semiconductor DH lasers. The calculation and analysis include effective refractive index and real refractive index distributions, phase plane, radiation patterns of far field and the lateral mode selectivity of the waveguide. Comparing the calculated results shows that the lateral waveguide in PCW structure is more stationary but the first...

In this paper we have given a numerical calculation and theoretical analysis of the lateral waveguide and the lateral mode selectivity, of the injected stripe-geometry semiconductor DH lasers. The calculation and analysis include effective refractive index and real refractive index distributions, phase plane, radiation patterns of far field and the lateral mode selectivity of the waveguide. Comparing the calculated results shows that the lateral waveguide in PCW structure is more stationary but the first order mode tends to be stimulated than that in slab waveguideo But by decreasing the thickness factor r, the selectivity can be improved, and the decreasing of γ can be realized by widening and shallowing the channals through the technology of fabrication.

本文以PCW结构和平面界面结构的半导体激光器为例,对它们的侧向模式导引机制和模式选择性作了理论分析,对等位相面分布和辐射远场图做出了较为精确的计算。计算结果与国内外报道的有关实验结果符合得很好。

As the gain-guided modes in semiconductor lasers are not energy-orthogonal,anyone of these "improper" modes should be composed of a set of energy-orthogonal "pro-per" modes.We further propose that under certain suitable conditions,a new mecha-nism of first order mode locking pulsation in a single gainguided mode semiconductorlaser is quite possible. This possibility has been verified theoretically.

本文从理论上提出由于增益波导各模式间不满足功率正交关系,因而每条模式应由若于条满足功率正交关系的本征模式所组成,故在一定条件下这些本征模式有可能产生一阶锁模自脉动的新机制.

Abstract Using a method for finding self consistent solutions of the optical field, carrier diffusion, and mode coupling equations, we have studied the transverse mode control of burried structure vertical cavity surface emitting lasers with trapezoid section. The influence of the slope angle of the confining region, the radius of the active region, and injected current on the radiation losses of the fundamental mode and the first order mode have been investigated. The results show that the radiation loss...

Abstract Using a method for finding self consistent solutions of the optical field, carrier diffusion, and mode coupling equations, we have studied the transverse mode control of burried structure vertical cavity surface emitting lasers with trapezoid section. The influence of the slope angle of the confining region, the radius of the active region, and injected current on the radiation losses of the fundamental mode and the first order mode have been investigated. The results show that the radiation loss of the first order mode is always larger than that of the fundamental mode, so that the high order transverse mode can be suppressed very well in this laser. Increasing the slope angle of the confining region is in favour of single fundamental mode operation. However, the radiation loss of the fundamental mode also increases with the slope angle, giving rise to a large threshold current. For a given radius of the active region, we have calculated an injected current range of single mode operation for different slope angles. Thus, the best slope angle of the confining region for single mode operation can be obtained in a given injected current range.

本文采用求解光场方程,载流子扩散方程和模式耦合方程自洽解的方法研究了具有梯形截面掩埋结构垂直腔面发射半导体激光器的横模控制.计算了掩埋限制区的倾角以及激光器有源区半径等对基模和一阶模的辐射损耗的影响.结果表明,在这种结构的半导体激光器中,一阶模的辐射损耗总比基模大,因而可以很好地抑制高阶横模.增大限制区的倾角,虽然有利于实现单基模工作,但是因为基模的辐射损耗也随之增大,从而激光器的阈值电流也相应增大.对于一定的有源区半径,我们找到了不同限制区倾角时单基横模工作的注入电流区域.从而可以确定在特定的注入电流范围内实现单基横模的最佳限制区倾角.

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关first order mode的内容
在知识搜索中查有关first order mode的内容
在数字搜索中查有关first order mode的内容
在概念知识元中查有关first order mode的内容
在学术趋势中查有关first order mode的内容
 
 

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