拋物線狀的 的英文怎麼說

中文拼音 [pāowùxiànzhuàngde]
拋物線狀的 英文
parabolic
  • 拋 : 動詞1. （扔; 投擲） throw; toss; fling 2. （丟下; 拋棄） leave behind; cast aside; abandon
  • 物 : 名詞1 （東西） thing; matter; object 2 （指自己以外的人或與己相對的環境） other people; the outsi...
  • 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
  • 狀 : Ⅰ名詞1 （形狀） form; shape 2 （情況） state; condition; situation; circumstances 3 （陳述事件或...
  • 的 : 4次方是 The fourth power of 2 is direction
  1. A reliability experiment of thermal aging was carried out for the two types of joints, scanning electron microscopy, energy dispersive x - ray spectrometer and micro x - ray diffractomer were adopted to investigate the interfacial evolution behavior of joints, and kinetics model of imc formation was established. the results show that imc growth follows the parabolic law as a function of aging time at certain aging temperature, imc growth is more sensitive to the aging temperature than the aging time, the activation energy of cu - al imc growth is 97. 1kj / mol and the major forming cu - al imc are cual2 and cu9al4, the activation energy of au - al imc growth is 40. 1kj / mol and the main au - al imc are au4al and au5al2, with au2al and aual at the interfacial periphery of joints, the rate of cu - al imc growth is about 1000 times slower than that of au - al imc, and kirkendall voids and cracks are easily appeared during thermal aging in gold ball bonds while voids and cracks are absent in copper ball bonds even after aging at 200 for 2900 hours and 250 for 169 hours

    研究結果表明:金屬間化合物厚度與老化時間的關系符合拋物線法則，金屬間化合物的生長對老化溫度比老化時間更加敏感; cu - al金屬間化合物生長的激活能為97 . 1kj / mol ，老化后金屬間化合物呈層狀分佈，主要相為cual2和cu9al4 ; au - al金屬間化合物生長的激活能為40 . 1kj / mol ，主要相為au4al和au5al2 ，同時在界面周邊區域生成了au2al和aual ;老化過程中cu - al金屬間化合物生長速率比au - al金屬間化合物生長速率小103數量級;金絲球鍵合點200老化96小時出現了明顯的kirkendall空洞和裂紋，但銅絲球鍵合點200老化2900小時和250老化169小時都沒有形成空洞和裂紋。
  2. The combination of fdtd method with physical optics is also used to analyze paraboloidal reflector antenna in millimeter band. using fdtd method, we obtains precise near fields of the feed because the computing areas include all the feed structure. the current on the paraboloidal reflector can be calculated by using physical optics, and then the far field of reflector can be calculated

    在毫米波拋物面天線的分析計算中，把fdtd與物理光學法結合起來， fdtd用於具有精細結構的饋源及饋電波導一體計算，得到饋源的幅度和相位方向圖，以此為依據調整饋源結構，使饋源的幅度和相位方向圖為最佳狀態。
  3. 2. nonlinear source term identification problem about a quasilinear parabolic heat equation is investigated. for the given function determined, the existence and the uniqueness of the solution of the state equation are proved and the dependence of the solution of the state equation on the identification parameter is discussed ; then the identifiability is verified ; through choosing suitable basic functions, the above identification problem can be transformed into a constant coefficients identification problem ; and an practical iterative algorithm for solving the identification problem is presented, the feasibility and validity of the algorithm is verified by the numerical experiments

    2 、研究一擬線性拋物型熱傳導方程非線性未知源項的識別問題；對于給定識別函數，論證了狀態方程解的存在惟一性、方程解與識別函數的依賴關系和可識別性；通過選取適當的基函數，把對非線性源項的識別轉化成常系數識別問題；給出了實現非線性源項識別的迭代演算法，通過數值實驗證明了演算法的有效性。
  4. The original flow rate formula of parobolic throat flume used for u - shaped channel is implicit function and is not convenient for calculation in irrigation districts. an simplified formula is developed in this paper, with a di fference between results calculated with the original formula and the new formul a being less than 0. 5 %

    用於u形渠道量水的拋物線形喉口式量水槽原流量公式為隱函數形式，針對其使用不便的現狀，通過理論分析推導出了顯函數形式的量水槽流量公式，計算結果與原流量公式比較相對誤差值0 . 5 % 。
  5. In this paper, two kinds of the aforesaid methods based on the parabola and catenary theories for the datum strand erection of the self - anchored suspension bridge of pingsheng bridge in foshan under non - datum state condition of erection are presented

    介紹基於拋物線理論和基於懸鏈線理論的平勝大橋基準索股非基準狀態下架設垂度修正量的確定方法及達到該垂度的施工控制方法。
  6. The curve of life is like the parabola of a projectile which, disturbed from its initial state of rest, rises and then returns to a state of repose

    人生的曲線就像是發射器的拋物線，脫離了原先的靜止狀態，往上射出，最後又回歸到靜止的狀態。
  7. A calculation method and calculation results that show that a new kind of shaped paraboloid antennas can produce a ringy radiation pattern is presented

    摘要通過數值計算發現：將拋物線繞通過焦點的非拋物線對稱軸旋轉而形成的賦形拋物面天線可產生環狀的方向圖主瓣（此主瓣指的是主瓣最大值處） 。
  8. Abstract : in this paper, the static shape control of the flexible intelligent thin - shell structure is derived by the intelligent thin - shell element of ref. 5. finally, a numerical example of a paraboloid antenna is given

    文摘:應用文獻5給出的三維智能薄殼單元研究了柔性薄殼智能結構的靜態形狀控制問題，給出了拋物面形天線的靜態形狀控制算例。
  9. The stresses and strarns of cylindrical spherical and paraboloid shells can be solved when the drawing unsteadiness happen

    文中就圓柱殼形、圓球殼形、拋物線殼形封頭等壓力容器的失穩狀態，分別求出它們的應力和應變。
  10. In this paper, the current states of research about the basic theory of stationary state perturbation method are firstly reviewed, on base of them, and studied some physics issues mainly about hydrogen atom. the stark effect of the energy level ( n = 4 ) of hydrogen atom is calculated and the stark effect of three dimensional hydrogen atom is discussed by the use of the parabolic coordinates, then the perturbative matrix elements for each energy level are given

    本文首先綜述了關于定態微擾論基本理論的研究現狀，在此基礎上利用定態微擾論對某些物理問題，主要是對氫原子問題展開了研究，計算了氫原子n = 4能級的斯塔克效應，並利用拋物線坐標法求解了三維氫原子的斯塔克效應，給出了氫原子斯塔克效應中微擾矩陣元的普遍公式。
  11. The fluffy crescent - shaped x - ray features that appear around the edge of the remnant are thought to be fragments of high - speed matter shot out from the star when it exploded, like shrapnel from a bomb

    射線下，環繞遺跡邊緣的蓬鬆新月狀結構據信是恆星爆發時高速拋出的物質的殘留，類似於炸彈的彈片。
  12. A truss deployable parabolic wave antenna is introduced to show the developing procedure of large space deployable antenna

    最後作為大型可展開天線的研製實例，介紹了一個構架式網狀可展開拋物面天線。
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