晶體格構 的英文怎麼說
中文拼音 [jīngtǐgégòu]
晶體格構
英文
crystal lattice-
Commonly the dolomite crystals form a framework with evenly distributed porosity.
通常白雲石晶體構成格架,它有均勻分佈的孔隙。The structures and characteristics of several graphite samples are measured by means of powder x - ray diffraction ( xrd ), brunauer - emmer - teller ( bet ) surface area measurement, inductively coupled plasma ( icp ) spectroscopy, particle size analysis and electrochemical measurements. the effects of origin, structure, impurity, particle size, specific surface area of carbon materials on the electrochemical characteristics are studied. a synthetic graphite with abundant resources, low cost and favorable performance is determined as the raw material for modification of graphite
採用xrd 、 bet 、 icp 、激光粒徑分析及電化學性能測試等方法,對國內外多種典型石墨樣品的結構與性能進行比較,研究石墨材料的來源、晶體結構、雜質含量、顆粒大小、比表面積等因素對其充放電性能的影響,確定一種性能較好、價格低廉、來源廣泛的普通人造石墨粉作為熱處理與摻雜改性、以及復合結構炭材料研究的原材料。The mi - crocavity of 1 - - d pc and 1 - - d pc sl structure are made. we study the re - flection and transmission characteristics of the microcavities
製作了一維光子晶體結構的微腔和一維光子晶體超晶格結構的微腔,研究了由此組成的微腔的反射、透射特性。Consisting of the protracting graph of hydrogen - like atom ' s angle distributing, computer simulation of the symmetry of molecular orbital and chemical reaction mechanism, showing the molecular point group and symmetry element, computer simulation of molecular vibration, bravias ' s crystal lattice and their transforming, extracting of plane periodic lattice, extracting of solid periodic lattice, close packing of isometrical pellet and the structure of simple mental substance, close packing of unequal pellet and crystal structure of representative ionic crystal, computer simulation of phase analysis by x - ray diffraction
內容包括類氫原子角度分布圖的繪制,分子軌道對稱性和反應機理的微機模擬,分子點群和對稱元素顯示,分子振動運動的微機模擬,布拉維晶格和晶格轉化,平面點陣抽取,立體點陣抽取,等徑網球的密堆積和金屬單質結構,不等徑圓球密堆積和典型離子晶體結構, x射線多晶衍射的微機模擬十個子模塊。Abstract : the effect of correction of self - consistent potential on electronic structure in simple cubic nanocrystal particles is calculated by means of the green ' s function method in the tight - binding approximation, taking only the nearest neighbor matrix elements into account. the numerical results show that the electronic energy spectrum is shifted, the chemical potential is not equal to the atomic energy level, the electronic density at each lattice point is changed, and the variation of electronic density at surface lattice point is the largest
文摘:在緊束縛近似下,只計及最近鄰的矩陣元,採用格林函數計算了自洽勢修正對簡立方納米晶體顆粒的電子結構的影響,發現電子能譜發生了移動,化學勢不等於格點原子能級,各格點的電子密度也發生了變化,其中以表面格點的電子密度變化最大。In manganite perovskites, substitution of divalent ions ( alkaline earth metals viz. ca, sr, ba ) in the a sublattice, introduces mn4 + ions or holes into the system. it is generally considered that the concentration of holes is equal to the concentration of divalent cations because of the charge compensation by controlled valencies
在類鈣鈦礦型晶體結構中通過摻入二價堿土金屬(如ca , sr , ba )可以在系統中產生mn ~ ( 4 + )或氧空位,由價格補償的原理,理論上摻入的二價離子的濃度和氧空位的濃度相等。The crystallization and melting behavior of mellocene - catalized branched and linear polyethylenes of low molecular weight was studied. it was found that the crystalline lattice of branched polyethylene is larger than that of linear polyethylene because of the existence of branched chains. the melting behavior of branched polyethylene is similar to that of linear polyethylene since the branched chains can not enter the lattice. however, the crystalline behavior of low molecular weight branched polyethylene is the same as that of high molecular weight linear polyethylene, but different with that of low molecular weigh linear polyethylene. kinetics theory analysis evidenced that the transition temperature of growth regime of the branched polyethylene is about 20 lower than that of linear polyethylene with the same molecular weight. it may be attributed to the existence of short branched chains
研究了金屬茂催化的低分子量支化聚乙烯和線性聚乙烯的結晶及熔融行為,發現支化聚乙烯的結構與線性聚乙烯相同為正交結構,但晶格略有膨脹.支鏈的存在對熔融行為影響不大,兩種聚乙烯的熔點均隨結晶溫度的升高而非線性增加,表現出低分子量樣品的共同特徵.但支鏈的存在對結晶行為卻有很大的影響,主要是由於支鏈的存在降低了晶體的結晶速率從而影響結晶過程,使得低分子量的支化聚乙烯的結晶行為與高分子量線性聚乙烯的結晶行為相似而與低分子量的線性聚乙烯不同.動力學分析表明,低分子量的支化聚乙烯的結晶生長方式的轉變溫度比同等分子量的線性聚乙烯降低了約20It is shown that with increasing doped value x, structures of the crystals change its low symmetry into high symmetry and doping with praseodymium can induce larger crystal structure distortion than other elements
發現塊材樣品隨摻雜量x增加,晶體結構由低對稱向高對稱性轉變。通過摻雜pr元素可以引起晶格較大畸變。The voltage of lithium - intercalation reaction, impedance and structural stability of intercalation - type cathode material were analysed and calculated. theoritical results show that the reaction voltage depends on the content of lithium and the bond energy, and that the key ways to lower the electrode impedance are to increase the electronic conductivity of the electrode and the diffusion coefficient of lithium ion in the host and to decrease the size of powder. in addition, the thermal stability of lithium - insertion structure can be improved by using crystallographic co - lattice theory and doping treatment
本文從嵌入式陰極材料的嵌鋰反應的電壓、阻抗及結構穩定性的分析和理論計算著手,得到了電壓取決于基體中各種離子間的鍵能及鋰含量、降低電極阻抗的關鍵是提高電子型導電性和li ~ +在基體中的擴散系數及減小粉末粒度的理論依據及其利用晶體的共格原理和摻雜改性的方式來提高材料嵌鋰結構的熱穩定性的設計思路。During the calculation of crystallography, we always need to make some calculation such as vector length, angle between vectors or planes etc. this is a group of scilab functions which can make some common calculation
晶體學計算過程中經常需要計算矢量長度、矢量夾角等。此scilab工具箱提供了一組適用於任何晶體結構的函數,可以在輸入晶格常數的前提下,計算一些常用的晶體學數據。Of photonic crystals with different lattice constants
不同晶格常數光子晶體構成的After some band structure analysis with the fast method, some interesting results are found for a 2d photonic crystal formed by a rectangular lattice of dielectric material gaas ( e = 11. 4 ) and air
對一種長方晶格結構的光子晶體,通過反復調節介質柱的長、寬和晶格的長、寬,得到該結構最大絕對禁帶寬度= 0 。The phase structure, the lattice constant, crystal grain diameter of the samples was obtained by the x - ray diffractions ( xrd ) spectra. their relations are showed respectively. influence of grain size on the lattice constant of several kind of phase structure was studied theoretically by interaction energy between atoms in nanocrystallites
其次,從結合能的角度出發,研究了nacl結構和cscl結構的離子晶體,面心立方( fcc ) 、體心立方( bcc )金屬晶體以及簡立方( scc ) 、面心立方( fcc ) 、體心立方( bcc )結構分子晶體的晶粒線度對晶格常數的影響。The growth morphology of cu - cr eutectic are studied. during the process of eutectic growth, ( + ) growth is clinging to a phase. because cu - cr eutectic have very good coupling relation, the configuration of eutectic holds crystallography structure, and the influence of the direction of heat flow is not distinct
2揭示了cu - cr共晶的生長形態,發現其在共晶生長過程中,共晶體( + )依附在相上生長; cu - cr因有較好的共格關系,其共晶形貌按照其結晶結構學特點生長,定向凝固下熱流的方向影響不顯著。Simplicity to use and ease to real - time output etc. the quartz crystai microbaiance based on the response of mass change, is a sensitive mass sensor and very suitable to the detection of biomacromoiecuiar. now it is expected to find widely use in ciinic chemistry, pharmaceutics anaiysis, environmentai detection and so on
而作為一種很有發展前途的傳感器件,壓電體聲波傳感器具有高靈敏度、寬響應譜、價格低廉、操作簡單及方便適時的輸出等優點;尤其是基於質量效應構制的石英晶體微天平具有很高的質量響應靈敏度,特別適合生物大分子的測定而廣泛用於臨床化學,藥物分析,環境質量等諸多領域。Srtio _ 3 ( sto ) thin films exhibit a large electric field dependence of dielectric permittivity. the microwave surface resistance of yba2cu3o7 - x ( ybco ) is much lower than that of the normal conductor. the typical value of rs for ybco epitaxial thin film is smaller than 1 m
在低溫下, srtio _ 3 (簡寫為sto )薄膜具有強烈的非線性介電性質,即:介電常數隨外加直流電場變化而變化; yba2cu3o7 - x (簡寫為ybco )具有極低的微波表面電阻, rs ( 10ghz , 77k ) < 1m ,而且它們的晶體結構相似,晶格常數匹配以及化學性質相容。In 6. 635, topics covered include : special relativity, electrodynamics of moving media, waves in dispersive media, microstrip integrated circuits, quantum optics, remote sensing, radiative transfer theory, scattering by rough surfaces, effective permittivities, random media, green ' s functions for planarly layered media, integral equations in electromagnetics, method of moments, time domain method of moments, em waves in periodic structures : photonic crystals and negative refraction
本課程所覆蓋的論題包括:狹義相對論、運動媒質的電動力學、色散媒質中的波、微帶集成電路、量子光學、遙感、輻射傳輸理論、粗糙表面上的散射、有效介電系數、隨機媒質、平面層狀媒質的格林函數、電磁學中的積分方程、矩量法、時域矩量法、周期結構中的電磁波:光子晶體和負折射率。We find that the lattice constant of ionic crystallites like nacl cscl structure decreases with the decrease of the grain size ; the lattice constant of metal crystallites like fcc, bcc structure increases with the decreasing of the grain size
發現對于fcc 、 bcc結構的金屬晶體來說,晶河北師范大學碩士研究生論文格常數隨著晶粒線度的減小而減小。這些結果與實驗定性地一致。Now the method of lever set is wildly used like crystal grows, etc. this paper mainly explains the application in the moving interface aspect of the method, which based on fast tree redistancing for moving interface, including definition of level set method, adaptive mesh ( octatree ) and interpolation of scattering points
水平集方法現已得到廣泛的應用,如晶體增長等。本論文主要闡述了水平集方法在求等距問題方面的應用,即一種基於樹形結構的快速等距面計算方法,包括水平集方法的定義,自適應網格剖分(本論文採用八叉樹的方法)以及離散點的插值。We also investigated the effect of c on the samples formed by ion implantation of mn and c. we studied the samples " crystal structure and surface appearance by x - ray diffraction and afm, experimental results revealed that with increasing the annealing temperature, the crystal lattice reformed and defect in the surface reduced gradually
還進行了mn ~ + 、 c雙離子注入,研究了c對樣品性質的影響。利用x -射線衍射法和原子力顯微鏡對樣品的晶體結構和表面形貌進行了研究。發現隨著退火溫度的升高,樣品的晶格質量得以恢復;注入表面形成的晶格缺陷逐漸減少。分享友人