structure constants造句
例句與造句
- phenomenal analysis of fine structure constant
發(fā)生改變的唯象分析 - these energy levels are determined by how tightly the atomic nucleus holds the electrons, which depends on the strength of the electromagnetic force between them ? and therefore on the fine-structure constant
能階是由原子核拉住電子的松緊程度所決定，而這又取決于能階之間的電磁力強(qiáng)度，因此便和精細(xì)結(jié)構(gòu)常數(shù)關(guān)系密切。 - these findings complement recent contentious observations that the fine-structure constant, which describes the overall strength of the electromagnetic force, has increased slightly
這項(xiàng)發(fā)現(xiàn)為近來(lái)一項(xiàng)引人爭(zhēng)議的觀察做了補(bǔ)充：用來(lái)描述電磁力總體強(qiáng)度的精細(xì)結(jié)構(gòu)常數(shù)，已經(jīng)些微增加了。詳情請(qǐng)見(jiàn)4月21日的《物理評(píng)論通訊》。 - 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
摘要本文介紹原子物理學(xué)中重要的無(wú)量綱常數(shù)之一的精細(xì)結(jié)構(gòu)常數(shù)的由來(lái)，討論它的物理意義和理論計(jì)算。 - 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
摘要本文介紹原子物理學(xué)中重要的無(wú)量綱常數(shù)之一的精細(xì)結(jié)構(gòu)常數(shù)的由來(lái)，討論它的物理意義和理論計(jì)算。 - It's difficult to find structure constants in a sentence. 用structure constants造句挺難的
- 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語(yǔ)言實(shí)現(xiàn)了對(duì)空-地激光傳輸?shù)墓夤β书W爍、大氣結(jié)構(gòu)常數(shù)以及湍流大氣中的水平激光傳輸遠(yuǎn)場(chǎng)光斑的計(jì)算機(jī)模擬仿真。 - 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
根據(jù)光波段的itu-rc_n~2模型，itu-r幅度閃爍標(biāo)準(zhǔn)偏差模型，和溫度和相對(duì)濕度隨高度變化的氣象數(shù)據(jù)，在1030ghz，分析得到了大氣結(jié)構(gòu)常數(shù)c_n~2隨高度變化的模型；并根據(jù)溫度和濕度垂直分布數(shù)據(jù)計(jì)算了對(duì)數(shù)幅度閃爍_x，還與itu-r和ortgies模型的預(yù)測(cè)結(jié)果進(jìn)行了比較，結(jié)果表明，在1030ghz，用該c_n~2模型計(jì)算的結(jié)果和用itu-r及ortgies模型預(yù)測(cè)的值符合較好，且在用c_n~2模型計(jì)算時(shí)考慮了溫度和相對(duì)濕度隨高度變化關(guān)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
在課題實(shí)驗(yàn)條件下，模擬計(jì)算了直接檢測(cè)dial系統(tǒng)的測(cè)量靈敏度。在考慮大氣折射率結(jié)構(gòu)常數(shù)對(duì)系統(tǒng)測(cè)量靈敏度影響的基礎(chǔ)上，并對(duì)各種系統(tǒng)參數(shù)如光束半徑、束散角和探測(cè)距離對(duì)測(cè)量靈敏度的影響運(yùn)用matlab程序做了仿真計(jì)算，為合理選擇系統(tǒng)設(shè)計(jì)參數(shù)提供了依據(jù)。 - 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
根據(jù)大氣折射率模型，以及折射率起伏功率譜密度和相位空間結(jié)構(gòu)常數(shù)，得到具體的結(jié)構(gòu)函數(shù)；通過(guò)長(zhǎng)程情況下的馬爾科夫近似，得到了互相關(guān)函數(shù)，對(duì)數(shù)振幅和相位協(xié)方差函數(shù)。 - 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
通過(guò)對(duì)數(shù)學(xué)模型和仿真結(jié)果的分析，得到以下結(jié)論：a)大氣湍流結(jié)構(gòu)常數(shù)隨海拔高度的增加而迅速減?。籦)由湍流引起的光功率閃爍與波長(zhǎng)呈反比；c)空-地激光通信的光功率閃爍小于地面水平傳輸?shù)拈W爍；d)空-地激光通信的光功率閃爍與波長(zhǎng)呈正比；上述結(jié)果與理論保持一致。 - 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
根據(jù)斜程傳輸理論和2001年提出的itu-r湍流大氣結(jié)構(gòu)常數(shù)模型，將修正pytov方法推廣應(yīng)用于斜程傳輸問(wèn)題研究，得到了平面波和球面波斜程傳輸時(shí)的閃爍指數(shù)，分析了湍流內(nèi)尺度、近地面風(fēng)速等參量對(duì)閃爍指數(shù)的影響。