經典近似 的英文怎麼說

中文拼音 [jīngdiǎnjìnsì]
經典近似 英文
classical approximation
  • 經 : 經動詞[紡織] （把紡好的紗或線梳整成經紗或經線） warp
  • 典 : Ⅰ名詞1 （標準; 法則） standard; law; canon2 （典範性書籍） standard work of scholarship 3 （典故...
  • 近 : Ⅰ形容詞1 （空間或時間距離短） near; close 2 （接近） approaching; approximately; close to 3 （親...
  • 經典 : 1. （具有權威性的著作） classics 2. （宗教教義著作） scriptures 3. （著作具有權威性的） classical
  • 近似 : approximate; similar; approach; approximation; roughness; propinquity
  1. To neutralize the function of cam, the cam binding domain peptide from bovine calcineurin a subunit was chosen because the pre - experiment demonstrated that bovine calcineurin could bind to calmodulin strongely in an acidic and high calcium concentration condition which is similar to the cell wall environment. in order to increase the binding ability of the chimeric secreted calmodulin binding peptide, the plasmid containing two copies of calmodulin binding domain were constructed

    它共有26個氨基酸，具有信號肽的典型特徵。為了削弱質外體cam的功能，選擇了牛腦鈣調神經磷酸酶can （ calcineurin ）的a亞基的cam結合域。預實驗結果表明，在近似於胞外環境的酸性高鈣條件下can與cam有強結合。
  2. So a conclusion can be got that the annealing in n2 raises the la2o2, stability. 3. the exact solution and wkb approximation are compared, the exact solution agrees with the wkb approximation in calculating the mono - layer sio2 tunneling current, but the wkb approximation is inappropriate for the dual layer oxide - lanthanum structure, while the exact algorithm can give a exact result

    比較了wkb和精確解法計算柵介質隧穿電流的方法，精確解法在解決單sio _ 2層和wkb準經典近似有相同的結果，但是wkb不適合計算la _ 2o _ 3 / sio _ 2雙層柵介層的隧穿電流，而精確解法能精確地計算雙層柵介質隧穿電流。
  3. Transformed the six - bar guide - bar mechanism realizing linear displacement in automatic instruments into a basic rotating guide - bar mechanism, established the mathematical model of velocity approaching constant by the classical approximate synthesis theory and the modern error theory, discussedthe influences of the existent region of main mechanismic parameters on kinematic and dynamic properties, analysed the theoretical transmission ratio error, advances systematic, complete steps and methods for dimensional synthesis of this mechanism with computer aided design

    將自動化儀表中實現線性輸出的六桿導桿機構轉化為基礎轉動導桿機構，應用經典的機構近似綜合理論與現代的誤差理論，建立了速度逼近常數的數學模型，討論了主要機構參數存在區域及對運動、動力性能的影響，分析了傳動比理論誤差，提出了系統完整的計算機輔助尺度綜合的步驟與方法。
  4. In the last part of the paper, we derive the euclidean equation of motion of the magnetic vector in a theoretical magnetic film consisting of biaxial - anisotropic molecular ferromagnets, which is reduced to the 2 + 1 dimensional sine - gordon field equation in the strong anisotropy limit. we obtain various domain structures which are the static solutions of the sine - gordon field equation

    最後考慮由雙軸各向異性分子磁體形成的理想無界膜，在強各向異性極限下，採用半經典近似方法，將磁化矢量的時空運動方程約化為2 + 1維sine - gordon場方程，從而得到各類疇結構。
  5. Secondly, the effectiveness and limitation of the classical perturbation, such as the method of multiple scales and the poincare - lindstedt method, are discussed in detail through a duffing oscillator with delayed velocity feedback. it is shown that the two perturbation methods are effective only in solving the approximate solution of the first two orders. an ambiguity or paradox will be encountered when they are used to seeking for the third or higher order approximation of solution

    其次，以一具有時滯速度反饋的duffing系統為例，研究了經典攝動法如多尺度法， poincar - lindstedt法等在求解時滯微分方程級數解時的適用性和局限性問題，指出利用這些方法只能有效求得系統的前兩階近似解，而在求系統的三次以上近似解時會出現矛盾或二義性。
  6. By calculating the feynman diagram in rtf, we find that when taking into account both the thermal photon emission, absorption and the virtual photon exchange processes, the infrared divergences at zero and finite temperature can be cancelled at the same time. the full quantum calculation results for soft photon radiation coincide completely with the poisson distribution obtained in the semiclassical approximation ( the coupling of the classical current and quantized field )

    通過實時溫度場論下的費曼圖計算，我們得到：將實光子的發射、吸收，虛光子的交換過程同時考慮時，零溫場論中出現的和由溫度效應引起的紅外發散都能得到消除；並且完全量子場論下的軟光子輻射幾率與半經典近似下（經典的電流和量子化的電磁場之間的耦合）得到的泊松分佈結果完全一致。
  7. The energy loss of protons or silicon nuclei due to nuclear scattering is calculated using binary collision approximation and the " magic " formula is used to calculate the scattering angle. the electronic energy loss is calculated by bethe - bloch formulation at high energy, by linhard - scharff formulation at low energy and the interpolation formulation is used for the medium energy region. the nuclear reaction is calculated using intra - nuclear cascade model

    核散射採用經典兩體碰撞近似，並用「夢幻」公式求解散射角；電子阻止在高能時採用bethe - bloch公式，低能時採用lindhard - scharff公式，中能時採用biersack的插值公式；核反應過程採用核內級聯模型。
  8. From the exact expression of the field, we obtain a multipole polynomial expansion, and under the paraxial condition we furthermore obtain the approximate expression. the loffe trap, consisting of two coils with parallel currents and four straight conductors with currents in alternating directions, is one of the most important traps. we specially study the field structure of it by using both the exact expression and a multipole polynomial expansion that facilitates studies of classical or quantum orbits. if the region near the origin is of interest, we may obtain a simple expression of the field and this configuration may be called idealized loffe trap

    若只討論阱中的近原點區域時，阱中的磁場可以呈現出一種簡潔的形式，人們把它稱為理想ioffe阱。磁矩反平行於磁場的中性粒子在阱中與磁場發生相互作用，藉助相互作用勢，可以獲得粒子在阱中的經典運動方程。在一定的近似條件下，我們可以採用逐次近似的方法，使方程簡化，其中三個分量式中關于z的方程比較容易求解，而關于x 、 y的方程則演化為我們熟悉的馬丟方程的形式。
  9. The coherent state is represented by a minimum uncertainty wave packet, the quantum correlation in these state is absent, so that it behaves as a quasi - classical state. it is such a property that leads to the results coincide completely with those obtained in semiclassical approximation

    正是因為相干態是一個量子力學允許的最小的測不準波包，沒有任何量子關聯，可以看作是一個準經典態，才導致了完全量子場論和半經典近似下理論結果的完全一致性。
  10. Scheduling problems are known to be in general np - complete, only sub - optimal can be obtained by classical scheduling approaches in most cases

    任務分配與調度問題是一類np問題，經典調度理論一般僅能獲得問題的近似最優解。
  11. Viewing from this, traditional capital market theories are studied by means of approximate analysis on which is based linear model

    從新古典主義經濟學關于資本市場的研究框架可知，傳統資本市場理論大多是在一個線性範式上的近似分析。
  12. In this paper, the nonclassical properties of two two - level atoms interacting with a single mode light field is studied by means of the quantum theory without rotating wave approximation ; the influences of the yirtual photon process on the mean photon number, the degree of second order coherence of field, the evolution of the field entropy and the squeezing effect are also discussed

    本文利用全量子理論，研究了非旋波近似下「耦合雙原子-單模光場」相互作用過程中光場所表現出的非經典性質，研究了虛光子過程對場的平均光子數、二階相干度、場熵演化特性及光場壓縮效應的影響。
  13. The two important instruments, linear and approximate analysis, o n which neoclassical economics depends, could n ' t be used to precisely describe practical capital market. many empirical analysis, home and abroad, show the limitation of emh

    新古典經濟學賴以生存的線性分析和近似分析這兩個主要工具，無法用來準確描述復雜的資本市場，國內外許多實證研究都佐證了emh的失效。
  14. Secondly, it introduces the classical pawlak rough sets model, which is a uncertain and vague conception based on equivalence relation and expresses by upper and lower set approximations

    接著介紹了經典（ pawlak型）粗糙集模型的基本理論，它是建立在等價關系基礎之上的，用上下近似集合來表示一個不精確的概念。
  15. Tests on a practical radial distribution system have shown that, the proposed method is as robust as, but more efficient than the back / forward sweep method

    文中以一個實際的中等規模配電系統為例，分析、比較前推回推法、導出的近似牛頓法、經典牛頓法等的收斂性和計算速度，證實上述研究結論。
  16. The first section introduces the background, significance and the relative development of the dissertation. then the roughness of rough surface and the basic theories of the scattering of electromagnetic waves from rough surfaces are discussed, and the kirchhoff approximation and small perturbation method are presidented in detail

    然後介紹了描述隨機粗糙面的有關統計特性參量，給出了處理粗糙面散射問題的不同方法，指明了各自的適用條件，並對經典粗糙面電磁散射的kirchhoff標量近似法和微擾法做了詳細闡述。
  17. At last, a classical parallel programme of computing the approximate value of n was run with different number of nodes and different scale of question on the self - established linux cluster system, and the process status and the performance results were monitored by the ppdbm at the same time

    最後，在自行搭建的機群系統上，用ppdbm系統對近似值經典并行演算法按不同節點數及不同問題規模進行了測試，對并行程序進程行為進行了實際監測和性能分析。
  18. We consider a neutral particle with magnetic moment antiparallel to the field. with the interaction potential energy between the magnetic moment of the particle and the magnetic field, we obtain the classical motion equation of the neutral particles in the loffe trap. in some limit conditions, by using the perturbative method, the equations may take on concise forms. of which the two equations about x and y are mathieu equations. if we properly set the parameters and have the condition a > > q > 0, we can solve the mathieu equation with the traditional wkbj method. as a new attemptation, with fourier series expansion we solve the mathieu equation and obtain the classical motion law of the neutral particles

    若阱的參數設置使得條件> > q 0成立時，我們可以利用傳統的wkbj方法近似求解馬丟方程。作為一種新的嘗試，本文還採用傅立葉級數展開的辦法來對馬丟方程進行求解，從而得到中性粒子在阱中的經典運動規律。在研究ioffe阱對中性粒子的囚禁問題時，實際上我們更感興趣的是馬丟方程的周期解，而要想獲得這種周期解，和q必須滿足一定的關系，亦即必須選擇阱的特定的參數和粒子的特定初始條件，對這一問題我們進行了嘗試性的研究。
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