number density 中文意思是什麼

number density 解釋
數量密度
  • number : n 1 數；數字；〈pl 〉算術。2 （汽車等的）號碼；第…，第…卷，第…期〈通常略作 No （復數 Nos ），用於...
  • density : n. 1. 稠密；濃厚。2. 【物理學】濃度；密度；比重。3. 愚鈍，昏庸。
  1. Thermodynamical fluctuation of number density of particles in grand canonical ensemble of perfect systems

    理想體系巨正則系綜中粒子數密度的熱力學漲落
  2. 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。
  3. Our results show that with the up to date experimental data, 13c can not sufficiently burn, the neutron number density decrease, the timescale of neutron source become long and these come into conflict with model of thermal pulse agb star

    研究結果表明，在新實驗結果下， 』 3c不能充分燃燒，中子數密度降低，中子源持續的時標變長，這與熱脈沖agb星的現有模型出現矛盾。
  4. Influences of initial damage on development of spalling damage have been indicated by analyzing the distribution of void number density, the cumulative percentage of void volume and the volume fraction of the different - seize voids

    通過分析孔洞數密度分佈、孔洞體積累積百分比、不同大小孔洞所佔體積份額的計算結果，指出初始損傷對損傷演化有直接影響。
  5. For the low pr hadrons, the bayon number density is very low and shows the evidence of early stage equilibrium. there exists elliptic flow character for the high pt hadrons

    對于低竹強于，在h 0處呈現較低的重子數密度，有早期平衡的明顯證據；對于高ptjffi子，有橢性流的特點。
  6. With the cell cycle model, the cell cycle related variables, such as fraction of budding cells ( fbc ) and cell number density, can be simulated

    通過細胞循環模型，求得與細胞循環過程相關的變量，如細胞帶芽分率和細胞數目濃度。
  7. Number density profile

    數密度輪廓
  8. In high energy neutrino - emulsion collisions, the normalized distribution of two - particle relative pseudorapidity and the correlation between the mean maximum number density of shower particles and multiplicity are investigated

    摘要論述了高能中微子與核乳膠碰撞中，歸一化的兩粒子相對鷹快度分佈，和平均最大簇射粒子數密度與多重數的關聯。
  9. The macro - mechanical properties ( the elastic constants ) of the fractured rocks can be connected with the micro - parameter of crack ( crack number density )

    這個模型將微觀隨機參數（裂紋數密度）與非均勻裂縫介質的宏觀性質（彈性常數）直接聯系起來。
  10. The distribution of the void number density has been numerically investigated under the condition of the same ratio of inner and outer diameters for all voids

    假設所有孔洞的內外半徑之比相同，用數值方法定性分析了材料在層裂損傷過程中孔洞數密度分佈的變化。
  11. Using the multi - cloud model to fit the ha - spectra data of the april 27, 1981 post flare loop, we obtained the spacial distributions of the four physical parameters in the space of the post flare loop : the line - of - sight velocity v the excitation temperature tex, the micro - turbulence velocity vt and the column number density of the hydrogen atoms at the second level along the line - of - sight direction fields n2

    我們利用多雲模型處理了1981年4月27日太陽西邊緣耀斑后環的三個時段的h光譜掃描資料。通過對1000餘條對稱譜線和不對稱譜線的計算，我們得到了該耀斑后環各個時段在空間上的視向速度場，激發溫度場，視向上處于第二能態的氫原子柱密度場以及湍流速度場。
  12. And the no - isothermal structure can accelerate the breaking of gravity wave in mesospause, and the breaking of gravity wave is an important source of convection and small - scale waves. the propagation of gravity wave will affect the distribution of minor species. the breaking of gravity wave accelerates the downward transport of atomic oxygen, some smaller - scale structures appear on the horizontal distribution of atomic oxygen number density, and other chemical species are also affected due to the chemical reaction with atomic oxygen and the propagation of gravity wave

    在重力波的傳播過程中，氫氧大氣成分的水平和垂直分佈均受到了不同程度的影響，以氧原子的響應最為明顯，而其中重力波破碎在氧原子水平分佈上的反應則是非線性重力波過程的一個重要表現；另外，分析顯示，重力波的非線性傳播對oh氣輝的峰值分佈由明顯影響，小尺度重力波的傳播有時會引起oh氣輝出現奇異的雙峰分佈，重力波的破碎現象也可以從對氣輝的觀測中反映應出來，這對利用氣輝觀測研究重力波傳播特性有非常重要的指示意義。
  13. The main simulation results were as follow : the average energy of electron decreases with the increasing pressure ; it decreases with the increasing methane concentration in the filling gas in the lower pressure range and increases in the higher pressure range ; the number density of fragment h and ch3 does not always increases with the gas pressure, but reaches an individual maximum ; energy carried by neutral dissociative fragment ch3 decreases with increasing gas pressure and ch4 concentration

    主要結果如下：平均電子能量隨著反應室內氣壓的增加呈下降趨勢；在較低氣壓范圍內平均電子能量隨著反應源氣體中甲烷濃度的增加而減少；在較高氣壓范圍內平均電子能量則隨著甲烷濃度的增加而增加；隨著氣壓的增加碎片h和ch _ 3的數目並不是一直增加的，而是在不同的特定氣壓下出現各自的最值；碎片攜帶的能量基本隨甲烷濃度和氣壓的增加而減小。
  14. The number density distribution of globular cluster in space will change with time due to the dynamic evolution, especially for those in the central region of the galaxy ; 5. for the power law initial cluster mass function, the peak value of the mass function after the dynamic evolution is sensitive to the lower limit of the initial mass function we adopt. the suggested value in this paper is - 104m, which is consistent with that reduced from the dynamical analyses for the giant molecular clouds

    對于冪率的初始質量譜，球狀星團系統動力學演化后質量分佈的轉折點質量主要是由初始質量函數的質量下限決定的，最為適合的值為10 ~ 4m _ ；冪率的初始質量譜的譜指數對球狀星團系統動力學演化后質量分佈的轉折點質量也有影響，其最佳值為1 . 5 2 . 0 ；經過大約5gyr的動力學演化，冪率的初始質量譜就會演化成為高斯的對數質量分佈並具有在隨后的動力學演化中保持對數高斯形式質量分佈的特性。
  15. Comparing with the current observations, which include the number density distribution in space, mass function, etc., the so - called standard modes for both the power law and gaussian cluster initial mass functions are selected among many runs of simulations. the deviation from the standard modes, which is resulted from the change of the parameter for the initial conditions, is discussed in detail. the discussion of the model parameters is also presented although they are adopted as the typical values based on previous work

    對應一定的初始分佈我們發現無論是冪律的還是對數高斯的球狀星團初始質量譜經過長時間的動力學演化都會得到和現在銀河系觀測到的球狀星團系統相符的對數高斯的質量分佈；動力學演化會明顯地改變球狀星團系統的空間密度分佈，靠近銀心區域的球狀星團瓦解得更多；經過動力學演化后的球狀星團速度分佈函數在靠近銀心的區域明顯得不同於初始分佈，初始擁有較大軌道偏心率的球狀星團更容易瓦解。
  16. The relationship between the gas and particles is obtained as well as the distributions of velocities both of gas and particle, temperature, particle number density, and other turbulent qualities such as turbulent kinetic energy and its dissipation rate. it finds that micro zone clean control through the well - designed flow pattern is possible

    在模擬的條件下探討了氣流運動和顆粒運動的關系，初步研究了通過氣流對不同分區進行潔凈度的控制實現的可能性，得出了不同送風狀態下氣相速度場和顆粒數密度的分佈、溫度及相關的湍流量的分佈。
  17. Meanwhile by using numerical method, the beam ' s one - order current density, and the power exchange between the beam and the field are solved. curves are given to illustrate the relations among the above solved parameters and the gap ' s transit angle in different electron velocity and number density

    然後通過數值求解得到了不同初始速度和電子數密度時徑向間隙中一階電流密度、高頻電場、電子束與本徵場的功率交換等隨間隙直流渡越角的變化規律。
  18. By analyzing of the potentiostatic transients, the diffusion coefficient d of the depositing nickel ions and saturated nucleus number density nsat were estimated, the effects of applied potential on nucleation and growth ware also discussed

    通過分析恆電位暫態曲線，求出鎳離子的擴散系數d ，以及不同外加電位下的飽和晶核數密度n _ （ sat ） ，探討了外加電位對成核作用的影響。
  19. With the film thickness, which was determined using transmission electron microscopy ( tem ), and the known material number density ( since the film is epitaxial on silicon, the number density is the same as in silicon crystals ), this determines the ge concentration

    由通過隧道電鏡（ tem ）決定的膜厚和已知材料的密度（因為薄膜為硅上外延，密度與硅單晶相同） ，決定了鍺的濃度。
  20. To model the elastic properties of rocks with distribution fractures, a new heterogeneous anisotropic constitutive model was presented. in this model, the autocorrelation function is used to describe the spatial distribution of crack number density

    提出一種新的非均勻各向異性本構模型來模擬具有分佈裂縫的巖石，在這個模型中用自相關函數來描述裂紋數密度的空間分佈。
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