橢圓形截面 的英文怎麼說
中文拼音 [tuǒyuánxíngjiémiàn]
橢圓形截面
英文
elliptical section-
It is mainly characterized in the triangular - lanceolate leaves which are green but white with dark green reticulation along the midrib and more or less truncate at base ; the flowers are erect on the rachis and half - opened ; the lip is tripartite, glabrous, more or less urceolate in side view ; the hypochile is saccate, ovoid and big while the epichile is relatively tiny, reflexed, undivided and transversely oblong or subreniform
本種之主要特徵為： ?呈三角?披針形， ?面?色，沿中?有白色斑塊， ?基多少呈截形；花直?于花軸，半張；唇瓣呈三段? ，平?無毛，側視時多少呈壺型；基段片囊? ， ?形，巨大，先段片相對微小、反卷， ?再細?而呈橫向橢圓形。A new waveguide made of changing a wide wall of a rectangular waveguide to a uniform curved wall is called conformal waveguide. a kind of expression of approximate solution for domain mode of the new waveguide, including symmetric, unsymmetric arc, parabolic arch, hyperbolic arch, elliptic arch, etc., is constructed by using boundary condition of mental waveguide, variational method and boundary element method. by using the equivalence principle, an approximate calculating formula for equivalent resonant conductance of a narrow longitudinal halfwavelength slot cut in the curved wall of the unsymmetric arcrectangular waveguide is derived, and the result is shown. although this solution is approximate, it can solve the problem in designing the slotted antenna of such conformal waveguide
把矩形波導一個寬面外突成均勻曲面構成的新波導統稱為共形波導.利用金屬波導邊界條件、變分法、邊界元素法構造這種新波導中主模場的一種近似解表達式，包括曲面橫截線為對稱、非對稱圓弧，拋物線弧，雙曲線弧，橢圓弧等.然後根據等效原理，推導非對稱圓弧矩形波導曲面上窄的縱向半波長縫隙的等效諧振電導的近似計算公式，給出計算曲線.這種解雖然是近似的，但卻能解決這類共形波導縫隙天線的工程設計When the dimensionless governing parameters exceed some critical value, the bifurcation phenomena in the rotation pipe with rectangular and elliptical will appear and the flow structure becomes more complicated
對于矩形截面和橢圓截面管道，當控制參數較大時，流動會出現分叉現象。Employing perturbation method and numerical simulation, we study the flow in rotating helical pipes including different rotations, different cross sections ( circular, elliptical, annular and square cross section ), and different geometrical structures
採用攝動方法和數值計算方法，研究了處于多種旋轉狀態下、多種截面形狀（圓截面、橢圓截面、環形截面、矩形截面） 、不同幾何結構旋轉螺旋管道流動。The experimental and numerical studies on the two enhanced tubes are performed. the strong multi - longitudinal vortex flow in the aea - tube is induced by alternating change of the elliptical cross - section, and for the ddir - tube, the strong multi - longitudinal vortex flow is
交叉縮放橢圓管是通過橢圓截面的交叉變化誘導產生強烈的二次流和多縱向渦流，而不連續雙斜向內肋管則是通過不連續的雙斜向內肋對的作用形成強烈的多縱向渦。When f is about fr, for curved pipes, the secondary flow appears eight vortexes for annular cross section and four for circular and four or six for elliptical ; for helical pipe, the secondary flow appears as a loop flow for annular and circular cross section, and a saddle flow for elliptical cross section
當f在fr左右時，對于彎管，環形截面上存在八個渦，圓截面上存在四個渦，橢圓截面上存在四個或六個渦；對于螺旋管，圓截面和環形截面上二次流表現為環流，橢圓截面上表現為鞍流。Based on the review, the fluid flow and heat transfer in the curved circular and rectangular pipes have been researched by employing perturbation method and numerical simulation with a physical model under the rotational orthogonal curvilinear coordinate in a rotating curvilinear pipe with multi - parameters. we firstly analyzed the fully developed fluid flow and heat transfer, mixed convection heat transfer, the development of flow and heat transfer in the inlet in different cross section ( circular, elliptical, annular and rectangular crossection ). the variations of the secondary flow, axial velocity, distribution of temperature, the friction force on the wall, the ratio of friction factor as well as the nusselt number with different dimensionless parameters had been examined in detailed
本文在總結和分析了一個世紀以來有關曲線管道流動和換熱特性的研究成果的基礎上，以旋轉正交曲線坐標系統下的多參數旋轉螺旋管道中的對流傳熱為物理模型，通過攝動方法和有限體積法，首次對各種截面（圓截面、橢圓截面、環形截面、矩形截面）旋轉曲線管道內充分發展流動的流動結構和傳熱特性（包括耦合對流傳熱特性）以及旋轉曲線管道開口段發展流動的流動結構和換熱特性進行了系統的數值模擬和理論分析，詳細討論了各種無量綱參數對管道內軸向速度分佈、二次流結構、溫度分佈、壁面摩擦力、摩擦系數比以及管道nusselt數的影響，獲得了若干創新性成果。The cross section of the fiber is full of oval space, which enables the product to absorb and evaporate moisture in a flash
其橫截面布滿橢圓形的空隙，可以在瞬間吸收並蒸發水份The fifth chapter investigates the dynamic relationship between geometry and architecture based on ellipse ' s geometric character, and analyzes ellipse architecture ' s characters in symbolism, dualism, diversity and unity these four facets. in the sixth chapter, taking ellipse architecture as examples, i try to explore the relationship between the more general geometry ' s purity and architecture ' s complexity, and build the foundation for future exploration of geometry ' s purity. in the seventh chapter, using typology contrast methodology, i analyze two architects with quite different design theories - tadao ando and koolhaas " adoption of ellipse, and taking position relationship as clue, combine ellipse and other geometric forms together to generalize the effect of geometry ' s purity to architecture ' s complexity in usual situations
第四章從歷史和現代兩個方面展開了大量對橢圓形式在建築中應用的個案和實例的研究與對比，探討了橢圓形式在歷史上意義的變遷；第五章以橢圓的幾何特性為立足點，研究了橢圓幾何- -建築之間的動態關系，從標志性，二元對立，多樣和統一四個方面分析了橢圓建築的特點；第六章以橢圓建築為例，嘗試探討了更一般的幾何的純粹性與建築的復雜性的關系，對幾何純粹性意義的挖掘為進一步的研究提供基礎；第七章採用了類型對比的研究方法，分析了安藤忠雄和庫哈斯兩位設計哲學截然不同的建築師對橢圓形式的使用；另外，以位置關系為線索，將橢圓和其他的幾何形式結合起來，總結了一般情況下幾何的純粹性對建築復雜性的作用。First, with the variational method, the variational lower bounds of the characteristic impedance are respectively computed of the conformal coaxial lines with circular, regular polygonal and elliptical cross - sections. then the optimal variational lower bound of the conformal coaxial line with a square cross - section is obtained
本文首先用變分法求解了截面為圓形、正多邊形和橢圓形的共形同軸傳輸線的特性阻抗的變分下界，得到了截面為正多邊形的共形同軸傳輸線特性阻抗的變分最優下界。The paper analyzed the struture of the tri - eccentric butterfly vavle at length, defined the tri - eccentric butterfly valve, educed the geometry function and its characteristic about the section of the butterfly disc. the results indicate : the parallel contour line across butterfly disc thickness is normal ellipse, thereby eslablished function relations between its geometry parameters ( long axis and short axis ) of three primary sections of the butterfly disc and the tri - eccentricity ; in order to avoid interference between the butterfly disc and the valve seat as well as the valve body, combining the torque, we obtained the feasible range about the rotation center of the tri - eccentric butterfly vavle
本文主要分析了三偏心蝶閥的結構，給出了三偏心的定義，推導出了蝶板截面的幾何方程及其性質，結果表明，沿蝶板厚度的平行截面輪廓線為標準的橢圓形，進而推導出了蝶板幾個主要截面的幾何參數（長軸、短軸）與三個偏心之間的函數關系；考慮到蝶板啟閉過程中避免與閥體及閥座發生干涉，結合蝶板的啟閉扭矩，確立了三偏心蝶閥回轉中心的適宜區域。The impact of the shape - change trend towards round on bending stress during the process of pressure increase was researched, a common formula and a simplified one for bending stress calculation were established, the formula of maximum bending stress caused by round degree of cylindrical vessels was deduced, the calculation method for wall thickness of pressure vessels of elliptical cross section was introduced
摘要研究了橢圓形截面容器在升壓過程中的趨圓變形對彎曲應力的影響，建立了彎曲應力通用計算公式和簡化計算公式，導出了由圓度引起的圓筒形容器最大彎曲應力計算公式，給出了橢圓形截面容器壁厚的計算方法。In this study, the effect of rotating elliptical inner cylinder on the instability of flow field, the relationship between azimuthal wave speed and the angular speed of inner cylinder, and the so - called ' hysteresis ' will also be investigated experimentally
本文主要目的除了藉由實驗比較橢圓與圓形截面內柱兩種系統加速過程中不穩定發生時機、流場流況的差異外；對于所謂的遲滯現象于兩系統中的發生過程亦將探討，此外內柱幾何形狀所造成高階不穩定於圓周方向的波形相速度變化，也是本文的探討重點。分享友人