零密度 的英文怎麼說

中文拼音 [língmìdù]
零密度 英文
zero density
  • 零 : Ⅰ數詞1 （零數） zero2 （數的空位） zero sign （0）; nought 3 （表示沒有數量;無） nil; nought 4 （...
  • 密 : Ⅰ名詞1 （秘密） secret 2 [紡織] （密度） density 3 （姓氏） a surname Ⅱ形容詞1 （距離近; 空隙小）...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  1. Using the lagrangian at a finite temperature of the scalar field which can generate global cosmic string in the spontaneous breakdown, solved the gravitational field equation outside the core of a global cosmic string at the background of temperature, corrected the result in the theory at zero temperature. on the basis of this, the properties of the gravitational field outside the core of a global cosmic string are discussed

    考慮溫度效應，運用改寫的能自發破缺產生整體宇宙弦的標量場在有限溫度下的拉氏密度，求解了整體宇宙弦核外的引力場方程，對零溫理論中的結果作了修正，進而討論弦核外引力場的性質
  2. The zero point of the density scale is defined by having no specimen in the densitometer.

    定義密度計內沒有樣品時的密度為密度尺標的零點。
  3. In quantum chromodynamics ( qcd ), vacuum is not trivial, that is, vacuum carry quantum numbers. such a behavior is embodied by non - perturbative con - densates of quarks and gluons. since hadrons are excitations with respect to the vacuum, hadronic properties are ultimately related to properties of the vacuum. based on the vacuum structure, some hadron properties have been described well. in the low energy region, qcd has two very important proper - ties : chiral symmetry spontaneous breaking and confinement, which are closely related to the vacuum characteristics of qcd. much experiments and theoretical studies have shown that chiral symmetry spontaneous breaking is very important to understand the low - energy feature of the strongly interacting physics, and the quark condensates give an expression to chiral symmetry spontaneous breaking. according to goldstone ' s theorem, the goldstone bosons with zero mass will emerge as the chiral symmetry is spontaneously broken. there are two ways : inear and non - linear methods to carry out this constraint. in our paper, we will use the non - linear method

    大量實驗和理論研究表明，手征對稱自發破缺對于理解低能強相互作用十分重要，而夸克凝聚又是導致手征對稱自發破缺的因素。按goldstone理論，伴隨手征對稱自發破缺應該會有零質量的goldstonebosons產生。而對于這一條件的實現有線性和非線性兩種方法本文將用非線性的方法將手征對稱自發破缺應用於su （ 3 ）模型即重子八重態，得出描述其強相互作用的手征對稱自發破缺lagrange密度。
  4. On 7 tracks nonreturn to zero recorded magnetic tape for digital data storage, density 8 rpmm 200 rpi

    數字數據存儲用7磁軌不歸零制記錄磁帶.密度8rpmm 2
  5. On 9 tracks nonretorn to zero recorded magnetic tape for digital data storage, density 32 rpmm 800 rpi

    數字數據存儲用9磁軌的不歸零制記錄磁帶.位密度32位
  6. Spontaneous emission can be totally suppressed or strongly enhanced depending on the relative position of the resonant frequency from the edge of the photonic band gap and the photonic mode density. several novel phenomena can be obtained. the spontaneous emission displays an oscillatory behavior, classical light localization, photon - atom bound state, nonzero steady - state population and anomalously large vacuum rabi splitting. and localized mode associated with a defect site in an otherwise perfect photonic crystals, acts as a high - q micro - cavity

    通過原子上能級與光子頻率帶隙邊緣的相對位置或者光子態密度，可以抑制或增強原子的自發輻射。分析並得到了一些奇異的現象，如自發輻射的諧振子行為、光的局域、單光子?原子局域態、上能級中存在非零穩態原子布居數、類似於真空中的拉比頻率分裂等。
  7. There is a vaporizing layer below 0 layer and it is far thick, which may be one of the important reasons of small precipitation on ground ; in the paper the cloud and the rain drop size distribution in warm layer of stratiform cloud are calculated and analyzed. it is found that n ( d ) = n0dnexp ( - a d ) can express the size distributions of little cloud drops, big cloud drops and rain drops. the observational and calculated results are well matched

    在零度層以下蒸發層的存在，且比較深厚，應是導致地面雨強較小的重要因素之一；本文對暖層的雲滴譜和雨滴譜進行了計算，對小雲滴、大雲滴和雨滴分佈可以用同一種形式的分佈密度函數多階函數n （ d ） = n _ 0d ~ nexp （ - d ）來表示。
  8. Examination of the density, strength, hardness and microstructure showed that the mechanical properties and structure of the part made by direct metal forming process are better than that obtained from selective laser sintering process, as good as or even better than castings

    對成形件進行的密度、強度和硬度指標測試和金相組織觀察表明：基於弧焊的直接金屬成形件的組織結構和力學性能指標明顯優于選擇性激光燒結工藝成形件，達到或高於鑄造零件。
  9. This kind of high silica wrought aluminum alloy is provided with low density and well heat - stability, especially with the metallurgical structur ? similar with bearing alloy ? which is composed of dispersion distribution common silicon crystal hard mass point and the alloyed basal body is very fit for the components manufacture ? can bear small capacity moving load and friction load

    這種高硅變形鋁合金具有密度小和200以下良好的熱穩定性，特別是它的由彌散分佈的共晶硅硬質點及合金化的相基體組成的類似軸承合金的金相組織、特別適合用於製做承受小能量動載荷和摩擦載荷的零件。
  10. The simulation results show that the model can reflect the distribution of heat flow density under the dissimilarity load, and then made up the shortage of zero - dimension model and three - dimension model

    通過在不同負荷下的模擬計算，說明了該模型能夠反映不同負荷下爐膛內的熱流密度分佈的不同，從而彌補了零維模型和三維模擬的不足。
  11. We say the gas becomes ideal in the zero-density limit.

    我們說在零密度的極限條件下，氣體變成理想的。
  12. Pipe joints and elements for high density polyethylene pressure pipelines, types 1 and 2 ; pipe bends for butt - welding, dimensions

    1型和2型高密度聚乙烯壓力管道用管子接頭與零件.對焊
  13. Pipe joints and elements for high density polyethylene pressure pipelines, types 1 and 2 ; injection moulded elbows for socket - welding, dimensions

    1型和2型高密度聚乙烯壓力管道用管子接頭與零件.承插
  14. Pipe joints and elements for high density polyethylene pressure pipelines, types 1 and 2 ; injection moulded tee pieces for socket - welding, dimensions

    1型和2型高密度聚乙烯壓力管道用管子接頭與零件.承插
  15. The space geometry is open and negatively curved as a saddle. if the density equals to the critical density exactly, the space is flat as a sheet of paper. if the density is greater than the critical density, the space geometry is closed and positively curved as a ball

    為負馬鞍形的開放宇宙假若密度和臨界密度相等，空間曲率為零，宇宙如一張白紙般平坦假若密度高於臨界密度，它則是一個空間曲率為正球形的封閉宇宙。
  16. 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。
  17. Cell morphology was similar no matter what method was used. percentage of live cells was significantly higher in erythrocyte splitting method that was ( 91 4 ) % than in centrifugation method that was ( 83 5 ) %. proliferative ability of mscs seperated by erythrocyte splitting method at 2 to 6 generation was much higher than by another method. the maximal cell number was 4. 67 vs 4. 10 times that of the initial cell number at cell inoculation

    紅細胞裂解法較密度梯度離心法細胞貼壁較慢， 36小時才可見零星細胞貼壁，兩種方法細胞形態相似。活細胞百分比，紅細胞裂解法為（ gi士4 ） ，密度梯度離心治（ 83士5 ） ，有明顯差異。傳代培養： 2 6代范圍內，紅細胞裂解法較梯度離心法細胞增殖更旺盛（分別是按種時細胞數的4
  18. This immediately tells us that the virtual quanta necessarily have to be short lived. thus the vacuum has a non - zero and very large value of energy density associated with it

    能在極短時間內復歸于無，在不違反能量時間測不準定理的情況下，短暫的能量不守恆是容許的，所以真空可擁有一個非零而非常大的能量密度。
  19. Standard test method for density, oil content, and interconnected porosity of sintered metal structural parts and oil - impregnated bearings

    燒結金屬結構零件和油浸軸承的密度油含量和互連孔隙率的標準試驗方法
  20. According to the mechanism characteristics of the ac motor, with zero - voltage switching technology, the pdm converter mathematical models both the pwm and rectangular wave control mode are given in this paper. and the voltage and current harmonic analysis and the simulation waveforms of the output voltage, current and power are also described respectively

    根據交流電機在恆轉矩區和恆功率區的特性，結合零電壓開關技術，分別給出相應的脈寬調制控制（ pwm ）方式和方波控制方式下的高頻交流脈沖密度調制變頻器的數學模型，電壓和電流的諧波分析以及輸出電壓、電流和功率的模擬波形。
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