structure constant meaning in English
构造常数
结构常数
Examples
- An atmosphere structure constant cn2 model , which varies with height , is presented based on itu - r amplitude scintillation model , existing itu - r optical cn2 model and meteorologic measurement relative humidity and temperature profile data , at 10 ~ 30ghz . the log - amplitude scintillation deviation calculated in terms of the cn2 model based on humidity and temperature vertical profile compare with values predicted by means of itu - r and ortgies model . it is emerged that the calculation results based on the cn2 model agree almost with prediction results by itu - r and ortgies model at 10 ~ 30ghz and there is an advantage that relative humidity and temperature varied with height has be considered in the cn2 model
根据光波段的itu - rc _ n ~ 2模型， itu - r幅度闪烁标准偏差模型，和温度和相对湿度随高度变化的气象数据，在10 30ghz ，分析得到了大气结构常数c _ n ~ 2随高度变化的模型；并根据温度和湿度垂直分布数据计算了对数幅度闪烁_ x ，还与itu - r和ortgies模型的预测结果进行了比较，结果表明，在10 30ghz ，用该c _ n ~ 2模型计算的结果和用itu - r及ortgies模型预测的值符合较好，且在用c _ n ~ 2模型计算时考虑了温度和相对湿度随高度变化关系。 - Under our task experimental condition , we calculated the sensitivity of our planning to develop dial system with direct detection , besides , we studied the relationship between the sensitivity of measurement and atmospheric refractive - index structure constant and applied matlab program simulated the system parameters such as beam diameter , laser divergence angle , detection distance and gained relevant relationship curves
在课题实验条件下，模拟计算了直接检测dial系统的测量灵敏度。在考虑大气折射率结构常数对系统测量灵敏度影响的基础上，并对各种系统参数如光束半径、束散角和探测距离对测量灵敏度的影响运用matlab程序做了仿真计算，为合理选择系统设计参数提供了依据。 - Since the effects of turbulent atmosphere is prominent , this thesis concentrates on the effects of the turbulent atmosphere on the laser beam propagation in the atmosphere . the atmosphere refractive index model , especially refractive index fluctuation , power spectrum , phase spatial structure constant are introduced in the following and the specific structure function is achieved
根据大气折射率模型，以及折射率起伏功率谱密度和相位空间结构常数，得到具体的结构函数；通过长程情况下的马尔科夫近似，得到了互相关函数，对数振幅和相位协方差函数。 - We have the following results through simulation and experiments : i ) turbulent structure constant of atmosphere decreases with altitude ; ii ) turbulence induced power scintillation decreases with the optical wavelength ; iii ) scintillation of space - to - ground optical propagation is smaller than that of horizontal optical propagation ; iv ) power scintillation of space - to - ground optical propagation increases with wavelength ; results above are accord with existent theory . what ' s more , the last result discovers a new rule
通过对数学模型和仿真结果的分析，得到以下结论： a )大气湍流结构常数随海拔高度的增加而迅速减小； b )由湍流引起的光功率闪烁与波长呈反比； c )空-地激光通信的光功率闪烁小于地面水平传输的闪烁； d )空-地激光通信的光功率闪烁与波长呈正比；上述结果与理论保持一致。 - According to the theory of optical wave propagation in the slant path and the itu - r turbulence structure constant model , which is altitude dependent and proposed in 2001 , the modified rytov method is extended to be applied to study on the problems , which waves propagate in the slant path . the scintillation index as a function of the rytov variance is obtained from weak to strong fluctuation regions with plane wave and sphere wave incidence , respectively
根据斜程传输理论和2001年提出的itu - r湍流大气结构常数模型，将修正pytov方法推广应用于斜程传输问题研究，得到了平面波和球面波斜程传输时的闪烁指数，分析了湍流内尺度、近地面风速等参量对闪烁指数的影响。