homogeneous medium 中文意思是什麼

homogeneous medium 解釋
均勻介質
  • homogeneous : adj. 1. 同種的，同質的，同性的，相似的。2. 純一的，均質的；均勻的。3. 【數學】齊性的，齊次的。adv. -ly ,-ness n.
  • medium : n （pl dia ）1 媒介物；傳導體；媒質，基質，介質，介體；中間物；環境、生活情形。2 手段，方法；媒介...
  1. There has been many papers to discuss the in - medium quark and gluon condensates in nuclear matter which use the models with su ( 2 ) l su ( 2 ) r sym - metry. now, we make use of the chiral model su ( 3 ) l su ( 3 ) n including the baryon octet to discuss the quark condensate < qq > in strange matter, where q is an up or down quark field. on the one hand, from the experimetal data, it is found that < qq > vac = - ( 225 25mev ) 3, on the other hand, with the hellmann - feynman theorem, quark condensate can be evaluated on the hadronic level. in this paper, we will investigate the quark condensate in strange matter with the chiral symmetry su ( 3 ) l x su ( 3 ) rspontaneous breaking lagrangian to obtain the variation of the quark condensate in the strange matter when the baryon number change. it can be applied to understand the neutron stars when the neutron star are considered to be constructed by the strange matter. because nertron stars are homogeneous and at very low temperature, we will use the mean - field approximation and zero temperature throughout this paper

    鑒于已有大量文獻討論了核物質中的夸克凝聚，本文將討論在奇異物質中的夸克凝聚。而在介質中的夸克凝聚的基本公式可由hellmann - feynman理論導出，所以運用手征對稱自發破缺拉氏量以及平均場近似，我們就可以討論在奇異物質中的夸克凝聚，由所計算的結果表明： （ 1 ）奇異物質中的夸克凝聚隨奇異物質密度的增大而單調減小。 （ 2 ） -凝聚的出現對衰減率有影響。
  2. From the mathematical point of view, the difficulty stems from the inability to get, with the traditional global transform like the fourier transform, a simplified differential equation that governs the evolution of the basic function through the non - homogeneous medium

    這些基本函數的全局特性使其在非均勻空間的演化變得十分復雜，從而影響了傳統方法的波場外推精度及效率。
  3. Essential to their utility is the requirement that the evolution of the basic functions through the propagation environment constitutes a simplified problem with an exact or approximate closed form solution to the original wave equation. the evolution of a spatial fourier harmonic through a homogeneous medium is governed by a reduced wave equation, obtained by applying the fourier transform to the helmholtz equation, with a simple and well - known solution - the plane wave

    這些方法均採用一組具有全局特性的基本函數對波場進行分解，如占據整個空間的富氏調諧函數或充滿各個方向的dirac函數（點源） ，並通過求解基本函數滿足波動方程的精確解或近似解來達到波場外推的目的。
  4. The various medium parameters have different influence on the reflection of the laser pulse. based on the diffusion approximation theory, the boundary condition of semi - infinite homogeneous media, the influence of the absorption a, the scattering s and the anisotropy coefficient g on the ultra short laser pulse of different pulse - width and shapes has been researched

    論文對超短脈沖在混濁介質中的傳輸進行了理論分析和數值模擬，並在不同脈寬的高斯脈沖和方波脈沖入射到混濁介質的漫反射、漫透射脈沖強度和形狀進行了理論分析和數值模擬，得到了它們與各光學特性參數的關系曲線。
  5. The application of transverse resonance theory is firstly extended further from plane homogeneous medium to the inhomogeneous spatial region by primarily combining the current martcatili method. then the simplex method is used to calculate the source point " s best position, frequency and the correspond wavenumber of the region

    重點結合已有的marcatili法，首次將橫向諧振法從平面均勻分層介質中的應用進一步延伸到模擬地殼波導的三維非均勻空間區域中，再利用單純形法，確定源點在該區域的最佳位置、最佳頻率和對應的傳播常數。
  6. In recent years, theories of elastic foundation and layers elastic body system have been widely applied and perfectly developed, but the theories often consider the medium as continuous, elastic, homogeneous, isotropy and submitting to small deformation hypothesis, and the anisotropy of the material has not been introduced

    近代發展的彈性地基和層狀彈性體系理論認為介質是連續、線彈性、均勻的和各向同性的，服從小變形的假設，沒有考慮材料的各向異性。
  7. These results are consistent with the results from gross and salzstein and so on. osteoblast is the seeded cell of bone tissue engineering. now, in order to research the response of the osteoblast when it is cultured with mechanical stimulating, the paper consider the osteoblast as an homogeneous, isotropic, incompressible viscoelastic medium

    由於成骨細胞是骨組織工程的種子細胞，為研究其在機械刺激離體培養下的受力情況，論文將成骨細胞看作是一種均勻、各向同性、不可壓縮粘彈性體，然後應用數值方法將物理關系中的遺傳積分展開，從而導出物理關系的矩陣形式。
  8. Any homogeneous viscoelastic medium subjected to one - dimensional tension and compression can be characterized in terms of the phase velocity c ( w ) and the attenuation coefficient deduce the complex modulus and the other equivalent viscoelastic functions

    一維的縱向壓縮波在同質的粘彈性介質中傳播時，材料的粘彈性特性主要通過縱向波的傳播速度c （ w ）和衰減系數a （ w ）兩項來定義。
  9. The micromechanics model of self - consistent scheme is that a particle is embedded in a homogeneous and isotropic medium whose conductivity is the unknown. at infinite distance from the particle a homogeneous boundary condition is prescribed

    自洽方法的微觀力學模型是：夾雜相顆粒處于熱導率恰為原復合材料等效熱導率的均勻各向同性介質中，無窮遠處受均勻邊界條件。
  10. According to the assumption that porous iron sample has transformed to homogeneous medium under a given shock pressure, a morse - type potential is used to simulate hugoniot curve and shock temperatures of porous iron by md method

    為了研究多孔鐵樣品在沖擊壓縮后系統溫度均勻性的問題，本文還採用anderson的對勢對多孔鐵沖擊壓縮線進行了分子動力學模擬。
  11. It uses the encouragement of step wave or other impulse current field source to produce the transition process field in earth. in the moment of shutting the power it produce the volute alternating electromagnetic field. from the abnormity of measuring the attenuation character of the second induction electromagnetic field, which produced by underground medium with time change, the conductive capacity and the position of the underground non - homogeneous substance can be analyzed

    瞬變電磁法（ transientelectromagneticmethod ）是一種時間域的電磁勘探方法，利用階躍波或其它脈沖電流場源激勵，在大地產生過渡過程場，斷電瞬間在大地中形成渦旋交變電磁場，測量這種由地下介質產生的二次感應電磁場隨時間變化的衰減特性，從測量得到的異常分析出地下不均勻體的導電性能和位置，從而達到解決地質問題的目的。
  12. The psm was extended to heterogeneous anisotropic medium and a program for 2d elastic waves propagation was written in fortran. the stable condition of psm for 2d anisotropic media was introduced and discussed. the propagations of elastic waves, excited by point sources in homogeneous isotropic / anisotropic rocks, were simulated

    導出了適用於模擬二維各向異性非均勻巖石中彈性波傳播、以位移為變量的偽譜法公式並編寫了相應的程序，並推導了適用於二維各向異性介質的偽譜法穩定性條件。
  13. 1. meshless local petrov - galerkin method ( mlpg ) is developed for solving the raidative heat transfer problems in homogeneous medium

    使用該方法分別求解了一維和二維半透明介質內的輻射換熱問題。
  14. Scattering of sh - wave by collinear cracks of any limited length originating diametrecally at the boundary of circular lining which has cracks in homogeneous medium is investigated, and solution of dynamic stress intensity factors in mode at crack tip are obtained

    按「契合」方式並採用裂紋切割技術構造含徑向裂紋圓環形襯砌對sh波散射的模型，利用green函數將問題歸結為求解第一類fredholm積分方程組。
  15. The green ' s function for point - source excitation is also very simple in homogeneous media. however, since global basic functions like plane waves occupy the entire domain and point source excitation radiates to all directions, their evolution through a non - homogeneous medium constitutes a problem that may become at least as difficult to solve as that of the propagation of the total field

    例如dirac函數（點源）在空間域可以有精確的定位，但在傳播方向上（波數域）卻毫無確定性；而平面波（波數域的基本解）則具有精確的傳播方向，但其波前卻是無限延伸的，不具任何空間局域性。
  16. At present, a composite medium in which ultrafine particles are dispersed in another originally homogeneous polymer ( matrix ) is an important absorbing material and has been used widely. this kind of material can be used both in coatings and in structure materials

    目前，一類非常重要且在國內已得到實用的微波吸收材料是在高分子粘結劑基體中加入超細顆粒製成的混合物，這種材料既可以用於塗覆型吸波材料又可用於結構型吸波材料中的某一層。
  17. In the pancreas, uptake of contrast medium during ceus using sonovue is very rapid ; at approximately 25 - 40 s it produces a transient, bright homogeneous enhancement that is due to the high vascularization of the organ

    在應用聲諾維進行胰腺對比增強超聲檢查的過程中造影劑的充盈是非常迅速的；因為胰腺是一個富血供的器官，在注入造影劑后25 40秒就會產生一個短暫、明亮而均勻性的強化。
  18. With these backgrounds, the object being investigated in this article is composite metallic and dielectric structure which is composed by piecewise homogeneous, linear and isotropic medium, the problem being investigated is the complex scattering and radiation problem, the intention being investigated is modeling and fast computing the electromagnetic characteristic of electric large complex structures with uniform method, the final objective is developing general fast electromagnetic computing software to solve the realize electromagnetic computing problems in engineering

    本文就是圍繞這一背景展開的，研究對象是由分塊連續、線性、各向同性媒質組成的「金屬與介質混合結構」 ，研究問題是復雜的散射和輻射問題，研究目標是以統一的方法對電大尺寸復雜結構作電磁建模與快速計算，最終目的是開發通用的電磁計算程序，來解決一些工程中的復雜電磁計算問題。
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