numerical expression 中文意思是什麼

numerical expression 解釋
數式
  • numerical : adj 數字的；數值的；用數字表示的。 （a） numerical order 號數。 a numerical statement 統計。 the ...
  • expression : n 1 表現，表示，表達。2 詞句；語句，措辭，說法。3 表情，臉色，態度；腔調，聲調。4 【數學】式，符...
  1. The scielltific computational theories and methods on bird strike to the windshield of aircraft have been systematically studied and summed up in this thesis, such as fem comptltational principles and procedures to elastic dynamic problems under the conditions of small and non - linear finite deformation, 3d viscous elastic constitutive theory and incremelltal expression under the consideration of the rate effect of non - metallic materials like the aircraft windshield, and the numerical compatational principles and key constitutions for impact - contact dynamic subjects

    2 、系統學習並歸納總結了鳥體撞擊風擋結構問題中的科學計算理論與計算方法。按照鳥撞問題數值計算方法逐步深入的思路，系統總結了小變形結構動力學有限元數值計算方法、有限變形的幾何非線性有限元數值計算方法、粘彈性體非線性形變的本構物理關系；對于實施復雜結構有限元動力學計算的載荷增量方法提出了對newmark差分的改進以及進行材料與幾何非線性數值計算的細致步驟。
  2. Based on establishing a quantitative index system of comprehensive assessment for dam structure monitoring behaviour, a new thought about measuring the quantitative indices, is offered by means of analyzing the dam safety monitoring data in two sides of numerical expression and trend expression

    摘要在建立大壩結構實測性態定量評價指標體系的基礎上，通過對大壩安全監測資料的數值表現和趨勢表現兩方面的研究，為研究定量評價指標的度量方法提供了一條基本思路。
  3. Only the method for using backwater expression can predict the variation of water surface near the spur dike very well. numerical simulations of the flume experiment cases are carried out with the standard k - e turbulence model

    隨后採用標準k一e紊流數學模型，依據水槽試驗資料，數值模擬了繞壩和漫壩兩種情況下水流的流動過程。
  4. For the first time, the coaxial ridge - disk - loaded cylindrical waveguide as sws is presented. its dispersion equation and the expression of coupling impedance are given by application of the field matching method. a series of numerical results show that the influence of structure dimensions on the dispersion characteristics and interaction impendance

    三、創造性地提出脊加載同軸膜片圓波導慢波結構，並對其採用嚴格的場匹配法，詳細推導了色散方程和耦合阻抗表達式，並得到一系列有關系統結構參量與色散和耦合阻抗之關系的數值模擬結果。
  5. For two - spheres system, we present the concrete expression of the t matrix in such a system. and some numerical results obtained by this expression are compared well with experimental data

    在雙球粒子體系散射問題的研究中，用矩陣求逆的方法，具體地給出了雙球粒子體系散射傳輸矩陣的表達形式。
  6. Hearing aids ; numerical expression of acoustical performance characteristics

    助聽器.聲學特性的數字表示法
  7. Many factors regarding the modifying coefficients of circular and rectangular section are analyzed : ( 1 ) it is theoretically proved that the diffusion coefficient of cl - in concrete is dependent of modifying coefficients ; ( 2 ) through analysis of the results of numerical value calculation, it is discovered that the relation between the modifying coefficients and the thickness of protection layer of concrete is linear, from which the function expression of these two variables is gain ; at the same time, the influence on modifying coefficient of the radius of circular section and the thickness of cl - on the surface of concrete ; based on these, practical calculating method of beginning corrosion time of steel of circular section is set up ; ( 3 ) to rectangular section, the diffusion of cf in concrete is two - dimension diffusion

    討論了影響矩形截面以及圓形截面修正系數的因素： （ 1 ）從理論上證明了氯離子在混凝土中的擴散系數與修正系數無關； （ 2 ）通過圓形截面數值計算結果的分析，發現圓形截面修正系數與保護層厚度基本成線性關系，並建立了二者之間的聯系；分析了圓形截面半徑、混凝土表面氯離子濃度對修正系數的影響，從而建立了圓形截面鋼筋初始銹蝕時間的實用計算方法； （ 3 ）在矩形截面氯離子侵蝕下，混凝土處於二維擴散狀態。本文通過計算分析，證明二維擴散的影響區域從邊角開始向中間逐步擴散，並證明了二維擴散影響區域依賴于氯離子擴散系數與氯離子擴散時間的乘積。
  8. We derive an analytic expression of the group velocity dispersion ( gvd ) induced chirp and the self - phase modulation ( spm ) induced chirp in the normal dispersionregion of non - kerr - like optical fibers with saturable nonlinarity. the evolution of chirp is simulated by numerical methods. the studied results show that the more powerful saturable effects, the smaller is chirp and the gently is chirp. the net chirp is zero in the central region of the pulse

    從理論上推導出具有飽和非線性的非克爾光纖正常色散區內，群速度色散效應導致的啁啾和自相位調制效應導致的啁啾解析表達式.利用數值解法模擬了非克爾光纖正常色散區啁啾演變過程.研究結果表明：當非克爾光纖的飽和非線性增強時，凈啁啾不斷減小，而且，越來越平緩，脈沖中心附近區域凈啁啾接近零
  9. In this thesis, a multi - disk rotor supported by two plain journal bearings is used for the numerical and experimental studies. the one aim is to analyze the nonlinear dynamic characteristics of the rotor system under different varying parameters ; the methods of online elimination of the oil whip and subharmonic vibration are developed and studied also. besides the expression of the nonlinear oil film force is proposed, so that the unbalance of the nonlinear rotor system may be identified online

    作者在總結了前人大量的有關非線性振動研究工作的基礎上，確立了本文的研究目標：一是以工程應用為背景，研究轉子-軸承系統由非線性油膜力引起的非線性振動特性以及各種影響因素，力圖通過對轉子-軸承系統非線性振動特性的分析，找到切實可行的在線消除油膜振蕩的辦法；二是研究非線性油膜力的表達方法式，使非線性轉子系統的不平衡量在線識別成為可能。
  10. Based on the definition of the average ambiguity function, the numerical expression of the average ambiguity function for the rppm pulse doppler radar signal is derived in this dissertation

    本文從平均模糊函數的定義出發，推導了隨機脈位調制脈沖多普勒雷達信號的平均模糊函數解析表達式。
  11. Definition : with in an english letter expression cube body number equality, is called the regular script numerical expression

    定義：用英文字母表示的一個正方體內的體數的等式叫正體式。
  12. In doing so, she created a numerical “ expression signature ” for everyone in the study and gave herself something to compare using statistics

    依靠這份資料，她在研究中給每個受訪者製作了一套數字形式的「表情簽名」 ，同時她自己也得到了可以用作統計對比的數據。
  13. The expression of the improved boussinesq equations in curvilinear orthogonal coordinate system is derived. on the basis of poission equation conversion, the methods to generate curvilinear orthogonal grids are introduced, and then the two - dimensional numerical wave model under curvilinear orthogonal coordinate system is established

    推導了正交曲線坐標系下的改進型boussinesq方程，以poission方程變換為基礎，建立擬合正交曲線坐標系下正交曲線網格的生成方法，進而建立正交曲線坐標系下的二維波浪模型，提高了模型對復雜地形的適用性。
  14. In order to illustrate the valid range of the axial intensity expression and approximation formulae numerical results of both the methods are compared

    使用軸上光強公式和近似公式對焦移計算結果的比較證明了近似公式的適用范圍。
  15. The interaction between femtosecond dark solitons is similar to that of the picosecond dark solitons. they are more stable than the bright solitons and have only little repulsive force between them. furthermore, the numerical results show that the interaction of femtosecond dark solitons agree with the empirical expression of picosecond dark solitons for the separation of two solitons as a function of initial separation and traveling distance in a certain range

    數值研究的結果表明：飛秒亮孤子間的相互作用不同於皮秒亮孤子，後者表現為周期性的離合，而前者在經過第一次吸引碰撞后便相互排斥離去，不具有周期性；飛秒暗孤子間的相互作用與皮秒暗孤子基本相同，它們比亮孤子更加穩定，只有微小的排斥作用，同樣也不具有周期性。
  16. The analytic expression for the spatial bright solitions obtained under the weak light intensity agrees well with the results obtained by the numerical calculation

    結果表明，在低振幅條件下空間明孤子的解析表達式與數值計算所得到的結果十分吻合。
  17. A constant expression that overrides the default numerical value of an enumeration member

    可選項。重寫枚舉成員的默認數值的常數表達式。
  18. Hence, the problems concerning the expression of position vector in the global coordinate system and the local coordinate system, and the numerical area integration by the natural coordinates were solved thoroughly

    這樣，完善地解決了單元中任意點在整體坐標與局部坐標的表示問題和基於局部自然坐標的面積分和體積分的數值積分的依據問題。
  19. The knowledge bases system in this expert system is self - contained system, which not only can store the accurate numerical knowledge and the fuzzy language expression knowledge accurately and conveniently, but also fuzzy continuous knowledge and dispersed knowledge effectively. it solved the problem of the store of subjection function and domain in the database, not concerning the type of the database

    這種表示方法具有完備性，根據它建立的知識庫不但能準確、方便的存儲精確的數值型知識和模糊語言表示的知識，而且能有效的表示、存儲模糊的連續型知識和離散型知識，既解決了隸屬函數和論域在數據庫中存儲的問題又不依賴于具體的數據庫系統。
  20. It is necessary to define a numerical expression of the defects in quantitative measure of the quality of part

    兩種方法的結合，必須對板材的成形缺陷進行量化的表示，以形成目標函數和約束條件。
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