mass density 中文意思是什麼

mass density 解釋
比質量
  • mass : n 彌撒；彌撒的儀式[禱告、音樂]；彌撒曲。 a high [solemn] Mass （有燒香、奏樂等的）大彌撒。 a low ...
  • density : n. 1. 稠密；濃厚。2. 【物理學】濃度；密度；比重。3. 愚鈍，昏庸。
  1. ρ is the mass density of the material.

    為材料的質量密度。
  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. This thesis described fuel management system theory and system reliability design to set forth system fuel management general design thought. many technical details are discussed in the thesis such as : fuel quantity measurement, fuel mass character calculation, fuel density measurement, the accuracy of fuel quantity measurement, the optimum location of fuel gauge probes in the fuel tank. the author brings forward a new method which is based on the software of catia to calculate fuel mass character

    本文對燃油管理系統的工作原理和可靠性設計等問題進行研究，以明晰燃油管理系統的總體設計思路；並對數字式燃油量測量、燃油質量特性計算、燃油密度測量、提高燃油量測量精度的措施、油箱油量傳感器安裝位置優化等具體技術展開研究；提出了一種基於catia軟體的燃油質量特性計算方法；論文最後探討了燃油管理系統的未來發展方向。
  4. The mass of jupiter is about 300 times that of the earth, however its density is low. in fact, these are general features of jovian planets

    木星的質量大約是地球的300倍，但和其它類木行星一樣，它的密度很低。
  5. The carbon nanotubes ( cnts ) are attractive materials for electrodes of supercapacitors due to their superb characteristics : chemical stability, low mass density, low resistivity, and large specific surface area

    納米碳管導電性好、比表面積大、微孔集中在一定范圍內，從理論上講是製作超級電容器的理想材料。
  6. Piezoelectric sensors, commonly known as quartz crystal microbalance, are sensitive to multiple signals such as the surface mass and the viscosity, density, dielectric effect, conductivity of the liquid

    壓電傳感技術則是一種比較成熟的傳感技術，可響應石英晶體表面的質量變化及溶液粘度、密度、介電常數、電導率等參數。
  7. This paper deals with the static and dynamic output kinematic accuracy of a group of elastic slider - crank mechanisms with the same design parameters by taking the bar length, joint - gaps, mass density, interception and physical parameters as random variables

    摘要將彈性曲柄滑塊機構的桿長、截面尺寸、鉸鏈間隙、質量密度、彈性模量等幾何、物理參數均視為隨機變量，對機構輸出運動進行了靜態和動態誤差分析。
  8. In the case of an open universe, the mass density ( denoted by the greek letter omega ) is less than unity, and the universe is predicted to expand forever

    在一開放的宇宙里，質量密度（以希臘字母歐米加表示）是小於平均數，且宇宙被預言永遠地膨脹下去。
  9. Again, a simple supported beam with stochastic mass density is used as an example. its statistics ( the mean value and the variance ) are calculated and compared with the theoretical values to verify the correctness of the used formulas. eventually this becomes the theoretical basis of the probability damage identification of the bridges

    3 .對于簡支梁橋，用該方法進行損傷識別，無論何種情況，識別結果都比較理想:對于有損傷單元，其單元損傷概率達到98 %以上;對于無損傷單元，其單元損傷概率一般都小於10 % ，可以認定，這些單元發生損傷的情況為小概率事件，即不發生損傷。
  10. Effects of acupuncture plus acupoint sticking on bone mass density and pain in the patient of primary osteoporosis

    愈痛貼治療痛經的藥效學研究
  11. Considering the randomness of physical parameters ( elastic module and mass density ) of structural materials, the structure dynamic characteristics is analyzed based on probability, and the distribution parameters of dynamic characteristics random variable is derived from the rayleigh s quotient

    在此基礎上，構造了具有頻率或頻率禁區可靠性約束的工程結構動力優化數學模型，並對其中關切頻率的估定，兩種頻率約束的統一表示等進行了討論。
  12. The effect of the rise of ground water level was simulated by increasing the mass density of pore water in the soil elements between the initial and targeted ground water levels

    通過逐步改變初始和終止地下水位間土單元中孔隙水的密度模擬地下水位上升的效應。
  13. The largest scale on which the mass density has been measured with any precision is that of superclusters

    已經用任何精密測量的質量密度的最大值是超星系團的數值。
  14. It ' s especially applicable for to increase the mass density of product

    尤其適合於增加產品堆積比重的場合。
  15. Introducing mass density allows the equation to be simple, understandable and applicable

    而且，引入質量密度后，該方程形式簡單並易於理解和應用。
  16. Mass density is the physical quantity determining the future of the universe. there is a value called the

    宇宙的質量密度決定了宇宙的命運，假若質量密度大過某一稱為
  17. The strength of the particles are high, the mass density is increased more apparently compare to other method of granulation

    顆粒強度高，堆積比重的提高較其它造粒方式都更為顯著。
  18. If the mass density is larger than the critical density, then the universe will eventually stop its expansion and start to collapse

    的數值，引力便足以使宇宙停止膨脹，並令它重新收縮，這稱為
  19. Chapter 4 proposes an incompressible lattice bgk model, in which the velocity and pressure instead of the mass density that is a constant are the independent dynamic variables

    本文第四章建立了以壓力、速度為獨立變量的不可壓格子bgk模型。
  20. A parameter known as the " mass density " - that is, how much matter per unit volume is contained in the universe - determines which of the three possibilities applies to the universe

    以「質量密度」聞名的一個參數-也就是，在宇宙里含有多少單位體積物質?確定三種可能性哪一種適用於宇宙。
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