cylindrical boundary 中文意思是什麼

cylindrical boundary 解釋
圓柱界面
  • cylindrical : adj. 圓柱體的，圓柱形的，長圓形的。n. -cality
  • boundary : n 邊界，疆界，限界 （between）;（球場）邊線；界標；界限，范圍，分野。 aboundary dispute 邊界糾紛...
  1. In the last part of this chapter, we will summarize the main results of existence, uniqueness and regularity for solution of such kind of problems. in chapter ii, we consider a class of boundary value problem for second order degenerate elliptic equations on a bounded periodic domain ft, which is homeomorphic to the cylindrical surface

    使用橢圓正則化方法分別在每個區域上討論dirichlet問題，即先構造輔助問題，並建立輔助問題的能量不等式，然後由緊性推理方法，利用輔助問題的解的某種收斂性來得到原問題的弱解存在性。
  2. Rolling bearings - cylindrical rolling bearings - boundary dimensions

    滾動軸承圓柱滾子軸承外形尺寸
  3. The corresponding control equation is given. the control equation and boundary condition about the addiontional small deformation ' s effect caused by initial stress using virtual principal theory in cylindrical reference frame. generalized stress and strain and equivalent constitutive equation are given

    第四章提出了描寫柱形薄殼中初應力的數值特徵，將應力的三維分佈轉化為二維分佈，給出相應的支配方程；在柱坐標系中，利用虛功方程建立了初應力對附加小變形影響的控制方程和邊界條件；給出了廣義應力、廣義應變及等效本構關系。
  4. Based on the semi - vector wave equation under cylindrical coordinate system, the mode distribution and complex propagation constant in bent waveguides were computed by a finite difference method with perfectly matched layer ( pml ) boundary condition

    摘要以柱坐標下的半矢量波動方程為基礎，採用基於完美匹配層（ pml ）邊界條件的有限差分方法，對彎曲波導進行模式求解，進而得到波導彎曲引起的輻射損耗。
  5. The conformal microstrip antenna with some unique character has been applied in many fields, especialy on speedy objects. in this paper, an efficient fdtd algorithm is introduced to analyse the microstrip antenna. firstly, the fdtd formula in descartes coordinate system and in cylindrical coordinate system are obtained from the time _ dependent maxwell equations using the yee algorithm in a calculating region where the dielectric parameters are independent of time and space. the choice of the space discretization units and the time discretization interval are discussed which are decided by the accuracy and stability respectively. the shape and setup of the excitation source are discussed too. the excitation source is chosen to be gaussian pulse in shape. secondly, the mur ' s first - order and second - order boundary condition are deduced in cylindrical coordinate system. the methods of transforming radiation fields from near zone to far zone in the frequency domain and in the time domain are presented when fdtd is applied to analyse the characteristics of far zone. finally, three kinds of microstrip antennas are analysed. they are a slot antenna that lies on a plane ground of a microstrip, a slot antenna that lies on a cylindrical ground of a microstrip and a microstrip line _ fed aperture coupled stacked rectangular patch antenna in cylindrical coordinate system

    本文從麥克斯韋旋度方程出發，建立了笛卡兒坐標下無源空間中均勻無耗媒質的fdtd基本方程和圓柱坐標下無源空間中均勻無耗媒質的fdtd基本方程，詳細討論了fdtd法計算中時間步長和空間步長的選取原則以及激勵源的類型和設置；推導了mur一階和二階邊界條件在圓柱坐標下的差分格式；給出了在用fdtd法計算天線的遠場輻射特性時必需採用的頻域和時域近場遠場變換技術；最後用fdtd法計算了平面微帶縫隙天線、柱面共形微帶縫隙天線和柱面共形微帶層疊天線的輸入阻抗和遠區輻射場，並分析了天線的一些參數的變化對天線輸入阻抗的影響，得出了一些有用的結論。
  6. Thirdly, the method to calculate the 3 - d dynamic responding of layered transversely isotropic saturated soils to an arbitrary buried source in cylindrical coordinate as well as to an arbitrary harmonious source in rectangular coordinate is presented respectively. based on biot ' s wave theory, the 3 - d wave equations in cylindrical coordinate for transversely isotropic saturated poroelastic media are transformed into a group of governing different equations with 1 - order by the fourier expanding with respect to azimuth and hankel integral transform method or by the double fourier transform method with respect to horizontal coordinates in rectangular coordinate. then, transfer matrixes within layered media are derived under the continuous conditions, drainage conditions and the boundary conditions

    基於飽和土的biot波動理論，通過fouricr變換，將橫觀各向同性飽和土三維非軸對稱波動方程轉化為一組一階常微分方程組，再經har止el變換，建立問題的狀態方程，求解狀態方程得到傳遞矩陣;利用傳遞矩陣，結合飽和層狀地基的邊界條件、排水條件及層間接觸和連續條件，首次給出層狀橫觀各向同性飽和地基在任意地展力作用下的三維非軸對稱動力響應的解析解。
  7. The numerical results show that the nature frequencies of the structure are affected by the temperature effect, boundary conditions and the number or orientations of layers ; the proper orientations can change the nature frequencies ; the effect degree on the nature frequencies of cross - ply laminated cylindrical shell is different from that of the antisymmetric one

    結果表明，溫度效應、邊界約束、鋪層層數顯著影響結構的固有頻率，適當的鋪層角度會改變結構的固有頻率，不同的鋪層方式對結構固有頻率影響程度不同。
  8. The strict solution of the eddy current distribution inside a conductor cylindrical boundary surface for quasi - state - state is obtained by derivation of maxwell ’ s equations ; meanwhile, the approximate solution of the eddy current and electromagnetic field in the condition of the low - frequency or the high - frequency are obtained. furthermore the penetration depth of the skin effect is achieved

    五、討論了似穩條件下導體圓柱面內的渦電流分佈的規律。我們採用圓柱界面條件下獲得的趨膚效應的穿透深度與採用平面條件下獲得的趨膚效應的穿透深度相一致，我們的研究可視為對傳統教材相關論述的有益補充。
  9. Rolling bearings - cylindrical roller bearings, separate thrust collars - boundary dimensions

    滾動軸承.滾柱軸承分離式止推環.界面尺寸
  10. Currently, cylinder2 - 1 / 2d includes boundary conditions for the electric and magnetic fields at the surface of ideal conductors, the cylindrical axis, the incoming wave ports. a new and simple model for explosion electron emission from cathode surfaces is described

    程序中實現了多種邊界條件，如良導體、對稱軸、入射波等，詳細地介紹了陰極表面爆炸發射電子的演算法處理和程序實現。
  11. In this dissertation, higher order anisotropic / tensor impedance boundary condition ( hotibc ) was derived and applied to anisotropic coated planar, cylindrical or bodies of revolution. the design of optimal ram for several conical targets was considered. the exact impedance for single and multilayer arbitrary material coated conducting planar and cylindrical surface were build hi spectral domain

    本文以各向異性介質塗敷結構為研究對象，研究各向異性阻抗邊界條件的導出和在平面及曲面結構上的應用方法和應用條件，最後，針對幾類典型體的ram進行優化設計，建立快速、有效的設計方法。
  12. Abstract : on the principle of heat - flow distributing and superimposing, this paper has directly obtained the solutions to the steady heat - conduction differential equations for a cylindrical wall with nonuniform generation under the first, second and third boundary conditions

    文摘:應用熱流分流和疊加原理，分別直接得出第一、二、三類邊界條件下，非均勻內熱源圓筒壁穩態導熱微分方程的解。
  13. Rolling bearings - double row cylindrical roller bearings - boundary dimensions

    滾動軸承雙列圓柱滾子軸承外形尺寸
  14. Rolling bearlngs - cylindrical thrust roller bearlngs - boundary dimensions

    滾動軸承推力圓柱滾子軸承外形尺寸
  15. Boundary element method on characteristic impedance of shielded rectangular line with cylindrical inner conductors

    用邊界元法分析圓柱內導體屏蔽矩形板線的特性阻抗
  16. Further suppose the container is the general cylindrical in shape, the boundary of the model is determined, the solution of the diffusion equation is solved

    開發的擴散模型建立的理論依據是梯度輸送理論即單位時間內物質通過單位面積的輸送的通量與濃度梯度成正比。
  17. Rolling bearings. cylindrical roller bearings, separate thrust collars - boundary dimensions

    滾動軸承.圓柱滾子軸承斜檔圈.外形尺寸
  18. Rolling bearings. cylindrical roller bearings, separate thrust collars. boundary dimensions

    滾動軸承.柱型滾子軸承分離式推力環.外形尺寸
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