積分步長 的英文怎麼說

中文拼音 [jīfēnbùzhǎng]
積分步長 英文
integration step
  • 積 : Ⅰ動詞（積累） amass; store up; accumulate Ⅱ形容詞（長時間積累下來的） long standing; long pending...
  • 分 : 分Ⅰ名詞1. （成分） component 2. （職責和權利的限度） what is within one's duty or rights Ⅱ同 「份」Ⅲ動詞[書面語] （料想） judge
  • 步 : Ⅰ名詞1 （步度; 腳步） pace; step 2 （階段） stage; step 3 （地步; 境地） condition; situation; st...
  • 長 : 長Ⅰ形容詞1 （年紀較大） older; elder; senior 2 （排行最大） eldest; oldest Ⅱ名詞（領導人） chief;...
  • 積分 : 1. [數學] integral; integrate; integration 2. [體育] （積累的分數） accumulate points
  1. In this paper, the upwind scheme and the central scheme are presented for solving 3 - d n - s equations using the cell - center finite volume spatial discretization and four - stage runge - kutta time stepping scheme, with standard convergence acceleration techniques such as local time stepping and implicit residual smoothing

    在n - s方程的數值計算上，採用了中心差分格式和迎風格式，用格心格式的有限體積法進行了空間離散，用四步龍格?庫塔法作顯式時間推進，並採用了當地時間步長和隱式殘差光順等加速收斂措施。
  2. The explicit finite element method ( fem ) based on the varying time - step was selected to analyse the dynamic roll - pass process ; the nodes on the leading face of the steady - state elements set was extracted and projected onto a plane to give the required mesh, also called the origin mesh ; the implicit fem was selected to analyses the inter - pass transient thermal process ; a geometric part from the mesh was generated and meshed by using the quadrilateral elements, a heat transfer analysis was selected to transfer the node temperature data ; a new model was created by using hexahedral elements, mapping the node temperature and the equivalent plastic strain on the integration points

    利用基於變步長中心差分格式的顯式積分方法分析瞬態軋制過程；提取穩態單元集節點形成截面網格；利用隱式積分方法分析軋制道次間隙瞬態溫度場；對型鋼斷面進行平面四邊形網格劃分並映射節點溫度數據；利用六面體單元構建有限元分析模型，映射單元節點的溫度、積分點的等效塑性應變，進行數值分析。
  3. The thesis also involves some detailed techniques come across in the numerical simulation process of elastic dynamic fem analysis, and remarks the theoretical foundation and applications to them, which covers mass scaling, hourglass deformation mode and dimensional compatibility

    本文還對彈性動力學有限元數值計算過程中遇到的若干技術細節進行了深入分析與探討。這包括質量縮放技術對時間步長的影響、單位制對計算速度的影響以及單元剛度單點數值積分的沙漏模態控制技術等。
  4. Firstly, the integral - differential equation described the radiation field evolution is derived, and then the instability of its solution is also investigated analytically. by using the perturbation and iteration method, the threshold detuning and threshold linear growth rate of the unstable solution are analyzed and discussed in detail

    首先，建立了一個描述輻射場演化的積分一微分方程，解析分析了系統解的不穩定性，並採用線性方程解的微擾迭代方法進一步對系統不穩定解出現的失諧量閾值和線性增長率閾值等作了詳細討論。
  5. To accept the current signal from high negative voltage circuit, the analog ground is raised to a certain positive voltage, which makes it possible for the signal amplitude to be compressed at the same time of its polarity reversion. a pi control program special for laser gyro current control is brought forward according to the conventional pid control method, in which the control signal is figured out corresponding to the difference between the sample and the reference value by turn of proportion - short step integral - long step integral. and at the end of this paper, a comparison of system performance on different conditions is made and the key elements influencing system performance are educed

    利用集成a / d 、 d / a轉換器的新型晶元aduc824 ，實現了電流（電壓）采樣?數據處理?電流控制的閉環控制結構；地電位的抬升解決了a / d轉換器對負高壓迴路電流采樣時的輸入范圍匹配問題；控制信號反相的同時進行幅度壓縮，使得輸出調整電壓的解析度提高；根據常規的比例?積分?微分（ pid ）調節模型，針對陀螺系統的特性，給出了一種可以滿足系統要求、據采樣值偏差大小進行的比例?大步長積分?小步長積分、分層次比例?積分演算法；不同條件下系統穩流性能的對比、分析在論文最後給出，並據此找出了決定該系統穩流精度的關鍵因素，提出了系統的改進意見。
  6. The model can be made into difference equation of the temperature field that can be used to simulate calculation ; then we can get the set of edge point, and we can have the function of the fire line, and we can also have the burned area, the length of fire line and the space of fire area ; it also come to the conclusion that the main factor of forest fire is convection heat transfer

    經差分處理，得到進行模擬計算的一組溫度場計算方程；由邊界點條件，求出邊界點的集合后，擬合得出火線函數，積分后可得到時刻火場的過火總面積、火線長度和火場形狀，同時進一步證實了對流傳熱方式是影響林火蔓延的主要因素。
  7. Mainly by using the data of land meteorological observation and sun radiation of mohe area, heilongjiang province, which is located deciduos needlelaf forest area in north china from 2001 to 2002, this paper adopts bats ( biosphere - atmosphere transfer scheme ), accepted in the world, and radiation computing solution developed by zhou suoquan et al

    本文採用國際上公認的陸面過程模式（ bats ）和周鎖銓等的輻射計算方案，主要選取大興安林區落葉針葉林區的漠河來進行試驗分析。使用2001 2002年常規地面氣象觀測資料和太陽輻射資料，以6小時為時間積分步長，進行了陸面過程和植被生長過程的模擬試驗。
  8. Above all, this paper work on the principle of simulink. principle of block and model are explained during initialization and execution stage. then runge - kutta ( 4, 5 ) formula which is a main numerical integration method of simulink and zero crossing detection function are analyzed

    從構成模型的基本單元? ?模塊入手，闡述其運行機理並對模型的執行階段進行全過程分析，然後介紹simulink的主要數值積分方法? ?四?五階變步長runge - kutta法的基本積分原理，以及simulink的拐點處理功能? ?過零點檢測技術（ zerocrossingdetection ）的基本原理。
  9. First according to the fact that tangential components of the evolution do not affect the geometric shape of the evolving curves, we introduce the evolution equation of geometric quantities for the general planar curves. then we describe the work of gage - hamilton briefly. last we consider a special curvature flow of curve which evolves with speed function of the principal curvatures along the inner norm and show that convexity of the curve is kept and its length and area are contracted if the initial closed curve is smooth and convex. so the final shape of the curve will be a point in finite time

    首先根據曲線在切向分量上發展是不影響曲線的發展形狀，我們引入了曲線的一些幾何變量的發展方程；其次我們簡要地回顧gage - hamilton研究曲線發展的一般步驟；最後我們考慮沿曲線的內法線以曲率的函數為發展速度的一類特殊的曲線族，證明了在初始曲線為凸的閉平面簡單曲線條件下，曲線將保持凸的，並且它的面積和周長將同時收縮，並在有限時間內成為一個點。
  10. Successfully applied markov process to analyze the change of vegetation cover, and point out the change of vegetation transition is not a single markov process but a multi - markov process and also is a long term process. 9. the writer proved that under the 8km resolution, the markov process ca n ' t estimate the trend of land use by two term - data no matter it ' s sequence or at intervals. through analyzing the change of each vegetation area, the change of spatial data and the markov process, the main conclusions are : in plain of china western arid land, the desert area decreased and the oasis area increased, most of the increase represents extension of the traditional oasis

    利用回歸方程對今後的植被變化情況進行了模擬預測，其結果具有一定的參考價值；南京氣象學院博士學位論文8 .將馬爾科夫過程成功地應用於中國西部干早區的植被變化分析當中，指出，植被的轉移變化不是一重馬爾科夫過程，而是一個多重的馬爾科夫過程;而且是一個步長較長的馬爾科夫過程; 9 .證明在8klll尺度下，馬爾科夫過程不能使用兩期的土地利用變化來預測土地利用的發展趨勢，無論這兩期的時間是連續的還是有一定時間間隔的;通過各類植被的面積變化、空間變化及馬爾科夫過程分析認為:中國西部乾旱區在平原區整體上荒漠面積減少，綠洲面積增加，綠洲的面積擴大主要表現在原有綠洲的擴大。
  11. It is well known that for an optical pulse, its distribution in time domain is infinite. but only a limited time window width t _ ( w ) may be selected in numerical calculations because of the limitation of the microcomputer. therefore, the selection of t _ ( w ) is also a key aspect that should be considered carefully in numerical simulations

    基於此，本文提出了利用分步傅里葉方法計算光脈沖在光纖中傳輸時間窗口的選取方法，給出了正確模擬光脈沖通過不同長度的光纖后光脈沖的變化所要選取的時間窗口（即計算過程中所取的積分上下限之差） 。
  12. Through caculation example, the factors that will influece the results of seismic soil response including element meshing, intergration step, damping, boundary were studied and the regularity was generalized. in the third part, the pile - soil - superstructure model was constructed and solved

    通過算例考察了影響土體地震反應的單元網格劃分、積分時間步長、阻尼取值、邊界等因素，並對土體地震反應的規律性現象做了總結。
  13. Along the medial axes with the same steps, we can get the average integral gray profile and the width profile. 3. karyotype classification of chromosome : according to the chromosome ’ s geometrical parameters, the karyotype classification are realized through the normal bayes classifier or fuzzy clustering based on the character of average integral gray profile

    利用染色體的中線等步長提取平均積分輪廓和寬度輪廓; 3 、染色體的核型分類:利用染色體結構參數即其灰度輪廓通過正態貝葉斯分類器或採用模糊聚類的方法來實現染色體的對號分類。
  14. Furthermore, the newton method can relax the lindt of step size due to convergent l [ ~ condition, llhp * fi ] < l, for the simple iteration method that is used in ll lyi ] <, for the simple iteration method that is used in, some general electric - mechanical transient simulation programs

    同時，牛頓迭代方法對步長力的限制較寬，可以採用較大的步長，從而克服了目前電力系統機電暫態程序中通常採用的簡單迭代演算法求解微分一網路方程，受迭代收斂條件的限制，積分步長h受限的問題。
  15. Because of continuity of load effects in time and space, displacement effects of previous time period in the latter time period and effects in various places have been taken into accounts. it is on these basis that the paper puts forward the dispersed counting way discrete algorithm based on such relationship, takes time - stepping integration to calculate rails " dynamic response, uses fortran language to write counting program, and conducts computer mock tests about rails " power response

    由於荷載作用在時間和空間上的連續性，因此考慮了前一時間段所產生的位移對后一時間段的影響以及不同位置的相互影響，在此基礎上提出了基於車輪、軌道、枕木相互關系的離散化演算法，採用時間步長積分計算了軌道的動力響應，使用fortran語言編制計算程序對軌道動力響應進行了模擬。
  16. The equations are solved by newmark integration method. 2. the nonlinear response and the journal trajectory of the rotor - bearing system are numerically investigated

    這樣的轉子系統具有高維和局部非線性的特點，可採用變步長的newmark積分法對系統的運動方程進行求解。
  17. Hence this method can improve accuracy and efficiency of the calculation. c. based on these work upwards, an adaptively wavelet precise time - invariant integration method was proposed in this paper. in this method, an adaptive multilevel interpolation wavelet collocation method for partial difference equations ( pdes ) was conducted, in which the time complexity is less than oleg v ' s method, and then the adaptive precise integration method was combined with, so that in this method the adaptively discretes both in time domain and physical domain were realized

    該方法將外推法引入求解結構動力方程的精細時程積分法中，從而使該方法在求解非線性動力方程中可以自適應選取時間步長；需要指出的是，由於考慮了矩陣指數精細演算法和外推法演算法在時間離散方法上的一致性，在外推過程中，計算工作量基本沒有增加；因此，兩種方法的結合有效提高了演算法的效率和精度。
  18. The teclinique of varying order and step size of integration is researched according to the truncation error controi. the study results have established the theory bases for the numerical integral methods of the full dynandc simulation

    並研究了根據積分的截斷誤差控制，自動變階變步長的技術，為電力系統全過程動態模擬技術中的數值積分方法奠定了堅實的理論基礎。
  19. The effect of the number of grid, liquid water content ( lwc ), median volumetric diameter ( mvd ) and ice layer time step on ultimate ice shape is analyzed, the aerodynamic characteristics of the iced airfoil is analyzed simply, too

    分析了網格數、空氣液態水含量、水滴當量體積直徑和冰層時間步長對模擬冰形的影響，此外還對結冰翼型的氣動特性進行了簡要的分析。
  20. By using this technique, the baseline of transmitting acceleration data in real time is adjusted, and the velocity and the displacement are integrated synchronistically

    利用此套技術可對實時傳輸的加速度記錄同步進行長周期基線校正、積分求速度及積分求位移。
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