數學常數 的英文怎麼說
中文拼音 [shǔxuéchángshǔ]
數學常數
英文
mathematic constant-
Given the initial conditions including ( 1 ) number density distribution in space which has the similar form to the present day ones, ( 2 ) both the power law and gaussian mass functions for clusters, and ( 3 ) two different velocity distributions which one has a constant dispersion and the other is described by the eddington formula, the dynamical evolution of globular clusters in our milky way galaxy is investigated in detail by means of monte carlo simulations
本文採用與觀測結果具有相同形式的球狀星團空間密度分佈函數，在給定兩種球狀星團系統的初始質量譜（冪律的和對數高斯的）和兩種球狀星團系統的初始速度分佈函數（愛丁頓速度分佈函數和常數的速度彌散度）條件下，我們採用montecarlo的方法對球狀星團系統的動力學演化進行討論。Optical characterization of hydrogenated amorphous silicon carbide films from transmission spectra
薄膜光學常數的透射譜表徵The results indicate that ( a ) before heat treatment, with the increasing of substrate temperatures, content of lower valency ( tij + ) decreases, the stoichiometric proportion of o / ti in all samples is about 2 ; the films have amorphous incompact columnar fiber structure, and with the increasing of substrate temperature, the size of columnar fiber increases ; the films have good hyalescence in visible range and great absorbability at the wavelength of 350nm ; optical constants of the films are calculated from the transmittance spectrums in visible range by mathematical analysis of the orders of interference, the results show that the refractive ind
研究結果表明， （ a ）熱處理前，隨著基片溫度的增加，薄膜中的低價氧化鈦含量逐漸減少，化學計量比趨于o ti = 2 ；薄膜具有非晶態不緻密的柱狀纖維結構，柱狀纖維的尺寸隨基片溫度的升高而增加;薄膜在可見光范圍內透明，在波長為35onzn時嚴重吸收，利用干涉級次法分析了薄膜的光學常數，結果表明，薄膜的折射率隨基片溫度的升高而增加，根據計算結果得到了tioz薄膜在不同基片溫度下的折射率色散曲線。The results also indicate that by taking particle size effect into consideration, the theoretical values of optical constants of the cermet films are more consistent with experimental values. at last we discuss the discrepancy between the theoretical results and the experimental results, and the factors that cause the discrepancy are analyzed as well
但是我們又發現對納米金屬陶瓷薄膜材料的光學常數的計算，考慮尺寸效應和極化因子修正後的值與實驗結果之間仍存在一定的差異，文章最後我們分析討論了產生這些差異的原因。Determination of ginsenoside rb1 in compound chanshu granule by rp - hplc
祖師麻總香豆素物理化學常數的測定Contains wedding photos, everyday pictures, and photos of the owners pets
-提供字典同義詞典讀音及錯別字參考個人網志數學常識討論區等。Provides constants and static methods for trigonometric, logarithmic, and other common mathematical functions
為三角函數、對數函數和其他通用數學函數提供常數和靜態方法。We find that the cosmic scale factor has the form of exponent inflation if the cosmological constant contributes to the positive material density, and the factor is composite function of cosine if the cosmological constant contributes to the negative material, furthermore, we gain the new formality of the pressure and the temperature in the procedure of cosmological evolution
首次發現當宇宙學常數對物質密度的貢獻大於零時有指數復合函數的型得一般暴漲，當宇宙學常數對密度的貢獻小於零時宇宙有餘弦形式的演化。通過對宇宙中壓強和溫度的計算，得到新的壓強表達式和暴漲宇宙模型中溫度隨時間演化的表達式。This special type of material may possess optical constants that are different from those at the fully relaxed material
這種特別的材料類型可能會擁有與完全馳豫材料不同光學常數。2. using the simulation method and a lorentzian oscillator model, the influence of the deviation in experimental parameters, including the thickness of samples, the incident angle, the misalignment of the time delay line, the background noise and the laser noise is analyzed
二、首次利用模擬thz輻射脈沖入射到共振吸收的樣品上的方法分析了厚度、角度、平移臺錯位、背景噪聲及激光器噪聲等對于光學常數測量產生的影響。Zero stress - optical constant
零應力光學常數In this paper, a model developed by t. d. dorney and d. duvillaret et al is used to discuss the principle and method for optical constants extracting. the real refractive index and extinction coefficient of materials and the extraction of other material parameters are also discussed
Duvillaret等人提出的模型的基礎上研究了從thz時間波形中提取材料的光學常數（實折射率和消光系數）的原理、方法，並對于如何得到材料的其他物理參數進行了探討。Study of the reasonableness of fitting model concerning dlc film optical constant
類金剛石薄膜光學常數擬合模型的合理性研究The infrared results showed that the ir characteristic value l080cm - lof cubic crystal sio, and the absorption peak 460cm - l of mgf, caused by the interaction between f - - mg ' + - p elastic vibration and photon radiation, appeared in the ir spectra. ellipsometric analysis showed that the typical absorption peaks 58lnm, 589nm and 606nm, resulting from the surface plasma resonance of cu panicles and reflecting the absorption on composite film system, appeared in the extinction coefficient k curves of cu ( voll5 % ) mgf, cu ( vol20 % ) mgf, and cu ( vol30 % ) mgf, cermet films, respectively. with the component of cu increasing, the peak site presented red shift, which was in accordance to the results of ultraviolet - visible spectra
橢偏測試分析表明： cu （ vol15 ） mgf _ 2 、 cu （ vol20 ） mgf _ 2和cu （ vol30 ） mgf _ 2樣品的消光系數k曲線中出現了反映復合金屬陶瓷體系吸收的由cu金屬顆粒表面等離子體共振引起的吸收峰，峰位分別為581nm 、 589nm和606nm ，呈現紅移，這些與紫外-可見光譜測試結果相一致；此外， cu - mgf _ 2復合納米金屬陶瓷薄膜光學常數的實驗值與考慮尺寸效應修正過的mg理論值總體上符合得很好。While the fodri chapter was the focal point, in which the preparation, microstructure and photoelectric properties of cu - mgf, cermet films were discussed in detail
膜的微結構、光學常數和應力特性；第四章是本文的重點，詳細論述了cll mgf 。系列樣品的制備、微結構和光電特性。As the position, intensity and width of the plasma resonance absorption peak are concerned, we find that maxwell - garnett and ping sheng theories are applicable for the cermet films with low metal volume fraction, while bruggeman theory fits better than maxwell - garnett theory for au - mgf2 films with high metal volume fraction
就金屬顆粒表面等離子共振引起的吸收峰的峰位、強度和峰形而言，對低金屬組分的納米金屬陶瓷薄膜光學常數的計算， maxwell - garnett和pingsheng要比bruggeman理論結果好。Mathcad applied to testing of the optical constants for thin films with ellipsometer
Mathcad在橢圓偏振儀測定薄膜光學常數中的應用Thermal analysis test methods for kinetic constants of combustible materials
可燃物質動力學常數的熱分析試驗方法Effect of annealing temperature on the microstructure and optical constants of al film
膜微結構及光學常數的影響Represents a mathematical constant having a history going back 4, 000 years, the earliest written record being from the egyptian
這個數學常數已有四千年歷史，而早於公元前約1650年，分享友人