结构常数 meaning in English
structural constant
structure constant
textural constant
Examples
- The fine - structure constant is an important zero dimension constant in the atomic physics . this article introduces the origin of fine - structure constant , and discusses its physical significance , and theoretical calculation
摘要本文介绍原子物理学中重要的无量纲常数之一的精细结构常数的由来，讨论它的物理意义和理论计算。 - And we also make the simulation of space - to - ground optical propagation by using the software of matlab , including scintillation , turbulent structure constant of atmosphere and spot of horizontal optical propagation
并用matlab语言实现了对空-地激光传输的光功率闪烁、大气结构常数以及湍流大气中的水平激光传输远场光斑的计算机模拟仿真。 - 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。 - 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。