場常數 的英文怎麼說

中文拼音 [chǎngchángshǔ]
場常數 英文
field constant
  • 場 : 場Ⅰ名詞1 （平坦的空地 多用來翻曬糧食 碾軋穀物） a level open space; threshing ground 2 [方言] （...
  • 數 : 數副詞（屢次） frequently; repeatedly
  1. The piezoelectric constant ( dji ) changes with the polarization time under saturated electric field. the d33 increases rapidly with the polarization time at the initial stages of polarization, and approaches constant after certain time

    在飽和電場（ es ）下，壓電常數（ d33 ）隨極化時間（ tp ）的變化而變化，極化初期d33隨tp的增加而迅速增高；極化一定時間后， d33趨于平緩。
  2. When the field is slowly - varying, the scalar field potential acts like a cosmological constant. in addition to the quintessence models, many other theories for dark energy have been proposed, including models based on super - symmetric gauge theories, super - gravity, small extra dimensions, large extra dimensions, quantum field theory effects in curved space - time. all these models are essentially based on the existence of a mass less scalar field acting at a cosmic scale

    除了真空場模型外，科學家亦提出其他解釋黑暗能量的理論，這些模型建基於不同的物理理論或假設，例如超對稱規范理論超重力增加一些小或大的空間維數量子力學在彎曲時空的影響等等，這些理論模型，返本溯源，其實背後都假設存在著一個特性類似於宇宙常數的無質量純量場。
  3. Witten ' s open string field theory formulate the interaction of bosonic open strings in the language of noncommutative geometry. compactification of matrix theory on the noncommutative torus was argued to correspond to supergravity with constant background three form tensor field. more generally, it has been realised that noncommutative gauge theory arises in the worldvolume theory on d - brane in the presence of a constant background b field in string theory

    Witten的開弦場論用非對易幾何描述了玻色開弦的相互作用；在非對易torus上的矩陣理論的緊化對應于帶有常數三形式張量場的超引力；更為普遍的，非對易規范理論可以自然地產生在帶有常數b背景場的三維d - brane上。
  4. ( 2 ) the results reveal that the pre - swirl ratio has a great influence on the flow field of the rotating disk, even greater than the rotational reynolds number, and an initial constant is induced in moment coefficient cm and average nusselt number nuave correlations, which does not exist in the case of without pre - swirl

    （ 2 ）分析了預旋系數_ r對該旋轉盤腔流場的影響，定義了一個新的壓力系數c _ p ，該壓力系數c _ p沿徑向位置的變化對特定的旋轉雷諾數re _是一個常數。
  5. Using the advanced technology by its head office ( newkey co., ltd. ), it produces various kinds of alumina black and white ceramic products. the component alumina ceramics, which are widely used in electron components, devices, electrical products, enjoy low loss of high frequency, high insulating strength, good specific volume resistance, small dielectric constant, high mechanical intensity and excellent airtightness and thermal and chemical stability

    本公司根據目前市場需求，生產出各種型號的黑、白陶瓷產品，廣泛應用於電子、電工、化學工業、紡織工業、水暖、宇航、環保等諸多方面，系列產品有高頻損耗少，比體積電阻大，介電常數小，強度高，氣密性、熱穩定性、化學穩定性好等特點。
  6. Observed tidal harmonic constants in many stations are used to verify the astronomical tides in the compound fluid model. the wave model is tested by a set of wave flume data at first. then the results are compared by the actual processes of significant wave height in gauging stations

    其中復合流場模型中的天文潮利用眾多測站的實測調和常數進行驗證；波浪模型首先進行了水槽實驗的檢驗，然後在臺風過程中，進行了測站有效波高過程線的比較。
  7. The results show that binding energies per nucleon at each density and various asymmetry parameters fulfill the empirical parabolic law and the asymmetry energy is density dependent. it is found that both scalar and vector potentials of neutron in the neutron rich nuclear matter become stronger although the isospin dependence is not stronger. we compare our results with those in a simple method, where the dbhf nucleon self - energies are extracted from the momentum dependence of the single - particle energy

    首先我們要求在每一個密度及各種不對稱系數的核物質中，相對論平均場（ rmf ）計算出的核子標量與矢量自能與dbhf計算出的標量與矢量自能一致，從而得到在rmf下的密度依賴的有效介子核子耦合常數，包括同位旋標量介子。
  8. In these contexts, the fields work because they are the simplest generalization of einstein ' s cosmological constant

    在這樣的情況下，由於純量場是愛因斯坦宇宙常數最簡化的歸納，因此它會產生作用。
  9. A two - cylinder model for saal incorporating bem simulations is proposed, which introduces a factor concerning the geometric parameters of the levitator into the expressions for the time - averaged potential u, acoustic radiation force f, and restoring force constant ki, respectively, and builds up the relationship between the levitation capabilities and the geometric parameters of a single - axis acoustic levitator

    建立了單軸式聲懸浮的優化設計理論模型，採用邊界元方法求解入射聲場，在表徵聲懸浮性能的時間平均勢u 、聲輻射力f _ i和回復力常數_ i的表達式中分別引入了一個涉及懸浮器幾何參數的因子。
  10. We present a charge - transport model of the photorefractive effect with two deep traps ( two deep - trap model ) based on one deep - trap model and shallow - deep - trap model. we also found dark decay behaviors which accord with the two deep - trap model in the two - beam interference experiments. the fast decay - time constant of the space - charge field is obtained as 714s

    此外，在ce ： batio _ 3雙光束干涉光折變光柵的暗衰減實驗中，也觀察到了符合雙deep模型的衰減現象，得到光折變空間電場快衰減時間常數714s ，約12分鐘。
  11. In the second section of chapter 2, the fact that the essential interest rates of all nodes differ from each other is discussed, a non - homogeneous differential equation model of interest rate - amount of circulating fund is established, and it is proved that the sum of the weighted interest rates of each node in the financial network still remains a constant and that the difference of the instant interest rates between two nodes will finally approach the difference between their basic interest rates. in the third section of chapter 2, the differential equation model of interest rate - amount of circulating fund in an open system is studied, the laws of changes of interest rate are taken into account when fund is injected into or withdrawn from the node or when fund is injected into the network or withdrawn from the network, and the stability of equilibrium solution is proved based upon lyapunov stability theory. in the last, the equation model of interest rate - amount of circulating fund in the financial network with time delay is studied, and a necessary and sufficient condition for the existence of periodic solution is obtained to the interest rate - amount of circulating fund equation with delay

    本文第二章首先建立了封閉系統的利率?流通量微分方程模型，證明了各結點利率加權和為常數即金融市場利率均衡原理，以及各結點利率極限為整個網路平均利率；其次在各結點基本利率不相同的情況下，建立了非齊次利率?流通量微分方程模型，證明了金融網路各結點利率加權和仍是一個常數，並證明了各結點兩兩之間的即時利率之差最終將穩定地趨于其基本利率差；此外，還研究了開放金融網路利率?流通量方程模型，考慮了結點自身追加資金和提走資金的情形以及網路外部注入資金和向外部轉移資金情形下的利率變化規律，用lyapunov穩定性理論證明了模型均衡解的穩定性；最後，還研究了具有時滯的金融網路利率?流通量方程模型，並給出了具有時滯金融網路的利率流通量方程具有周期解的充要條件。
  12. According to the theory of light transmission, we derived the expression of rotation angle as a function of the dielectric constant conductivity of er fluid, and ( the angle between the electric vector of linearly polarized light and electric field ) from maxwell ' s equations and fresnel reflection, on the condition of several appropriate approximations and assumptions

    進而導出了非均相結構電流變液在外電場與光場交互作用下旋光角與（入射線偏振光振動方向與外加電場方向間夾角）及參數（為外加電場e 、分散顆粒介電常數、體積分數、絕緣油介電常數、位置矢量（ ? ）等量的函數）的西北工業大學應用物理系碩士學位論文摘要理論表達式。
  13. Based on an engineering background, through numerical simulation of the flow field in the hp turbine of the energy efficient engine ( e3 ), the article research the unsteady flow in a transonic turbine stage, the unsteady phenomena in the stage include the shockwave, wake, shedding vortex, endwall vortex, passage vortex and leakage vortex, etc. there are two shockwaves generated on the vane the tailing edge, one on suction side is named moving shockwave, and name another on pressure side steady shockwave

    本文首先對于研究的意義和國內外研究的現狀做了簡要的介紹，再從某工程背景出發，通過對e3發動機高壓渦輪內流場的數值模擬，研究了干涉的周期性的問題，以及渦輪級內常見的非定常現象：激波、尾跡、脫落渦、根腳渦、通道渦、漏流渦。導向器尾緣會出現兩道激波，在吸力面的激波可稱為「運動」激波，壓力面的激波可稱為「定常」激波。
  14. So the characteristics of these four groups of optical field arrangements are compared and the corresponding error analysis is made

    為此通過對上述4種光場的特點進行分析比較，給出了通常採用的光場參數下的誤差分析。
  15. And the sm ( cocufezr ) z thin films with lower magnetocrystalline anisotropy constant of cell boundary phase will have a higher coercivity

    而較低的胞壁相磁晶各向異性常數k1 ，則有助於獲得高的釘扎場。
  16. Given dynamic stress concentration factor around the interface circular lining. some examples and numerical results and illustrated, the influence of wave number, incident wave angle and combination of different medium parameters upon dynamic stress concentration factor are discussed

    針對具體算例給出數據結果討論了不同波數條件、不同入射角作用、不同的材料常數組合對界面襯砌散射波遠場位移模式和散射截面的影響。
  17. Featured by wide band gap, high breakage electric field, high electron mobility, low dielectric constant, strong irradiation proof and excellent chemical stability, silicon carbide ( sic ), viewed as one of the most promising wide band gap semiconductors, is widely utilized in optoelectronic devices, high frequency and large power, high temperature electronic devices

    被譽為最有潛力的寬禁帶半導體材料一sic ，因其具有禁帶寬度大、擊穿電場高、熱導率大、電子飽和漂移速度高、介電常數小、抗輻射能力強、良好的化學穩定性等優異的特性，被廣泛地應用於光電器件、高頻大功率、高溫電子器件。
  18. The essentially universal biophysical phenomenon of " electroporation " occurs if an appropriate pulse field is applied. electroporation is believed to be the rapid creation of aqueous pathways through lipid - containing barriers in cells and tissue. the driving force is the physical interaction of electric fields with different dielectric constants

    電穿孔效應是指在適當高壓脈沖電場作用下，細胞或組織間起相對隔離作用的「屏障」內快速形成液態通道的現象，是電場與具有不同介電常數而且易變形的物質相互作用的結果。
  19. If a scalar field changes slowly, it resembles a constant, both in its fixed magnitude and in its lack of directionality ; relativity theory predicts it will produce a gravitational repulsion

    如果純量場變化緩慢，它就會有固定的大小，而且沒有方向性，就像一個常數一樣；相對論預測，這種情況會產生重力排斥效應。
  20. Analysis on the species richness and diversity index, community evenness in different plots and layers of evergreen broad - leaved forest in shiyang forest center in wencheng, zhejiang province resulted that species richness and diversity index, community evenness of the second sublayer of tree layer was much greater than that of the first sublayer in the vertical structure of the community

    對文成縣石?林場常綠闊葉林的不同樣地、不同層次的物種豐富度、物種多樣性指數和群落均勻度進行了分析，結果表明:在群落垂直結構中，喬木層第2亞層的物種豐富度、物種多樣性指數、群落均勻度顯著大於第1亞層。
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