積矩系數 的英文怎麼說

中文拼音 [jījǔxìshǔ]
積矩系數 英文
product-moment coefficient
  • 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...
  • 矩 : 名詞1. （畫直角或正方形、矩形用的曲尺） carpenter's square; square2. （法度; 規則） rules; regulations 3. [物理學] moment
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. Calculus, differential equations, linear algebra, statistics, computer science and at least one in numerical analysis, matrix algebra or computer systems

    微積分，微分方程，線性代數，統計，計算機科學和至少一數值分析，矩陣代數或計算機系統
  2. The aerodynamic characteristics of a projectile with wrap around fins are studied systematically in this paper, as follows : 1. the lift coefficients 、 drag force coefficients 、 pitch moment coefficients 、 pitch damping moment derivatives and roll damping moment derivatives are obtained from engineering calculation through looking wrap around fins as flat fins of the same projection aera

    本文對某卷弧尾翼彈氣動特性進行了系統研究，主要內容與結論為: 1 .將卷弧翼按照相同投影面積的平板翼進行工程估算，得到升力系數、阻力系數、俯仰力矩系數、俯仰阻尼導數、滾轉阻尼導數曲線。
  3. Pearson product - moment correlation coefficient

    皮爾森積矩相關系數
  4. In this paper, the following work has been done : 1 the load - bearing capacity of l, t and + - shaped columns under axial compression and biaxial bending is calculated by a numerical integral program

    本文主要進行了如下工作： 1對l 、 t 、十形柱雙偏壓作用下正截面承載力進行計算，編制了數值積分程序，並對l 、 t 、十形柱偏心矩增大系數進行計算分析。
  5. The interspecific association and correlation of 36 dominant species of the wetland vegetation were analyzed by using x2 - test, pearson ' s coefficient and spearman ' s coefficient. the results shown that those dominant populations composed 630 species - pairs ; among the 36 species were herbs, and the higher significant association ' s or correlation of species - pairs were 49, 88, 71, respectively, moreover, the significant association ' s or correlation of species - pairs were 31, 9, 7, respectively

    採用x ~ 2檢驗、 pearson積矩相關系數和spearman秩相關系數等方法對濕地植物群落的種間關系研究，結果表明： 36個建群種群和優勢種群構成的630個種對（其中主要是草本植物） ，其中極顯著關聯的種對數分別為49 、 88 、 71 ，顯著關聯的種對數分別是31 、 9 、 7 。
  6. The granulometer error can be corrected through calculating an integrated light energy distribution coefficient matrix

    系統誤差可以通過計算積分式光能分佈系數矩陣校正。
  7. 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。
  8. In the third chapter, the mathematical models of project system have been established, and simulation has been done on the simulink enviroment of matlab software kits. the simulation focus on the effects of main parameters on the dynamic characteristics of speed control system, and the main parameters include viscosity damp coefficient and friction torque of electrical motor shaft, internal leakage coefficient of pump / motor of hydraulic circuits, gas volume of pressure accumulator, viscosity damp coefficient of cylinder piston and different running building floors, etc. at last, theoretical research effects of the flow and pressure pulsation of pump / motor on car speed and oil volume leakage theory are discussed. the fourth chapter of this thesis concerns the research on the key items about hydraulic power control system according to the ens 1 - 2 and other hydraulic elevator standards

    論文第三章針對組成系統的各個模塊進行了機理建模，並且通過matlab軟體中的simulink圖形化模擬環境進行了本課題系統的模擬研究，主要針對影響系統特性的主要參數變化，動態分析系統的輸出特性，在上下行工況中，分析了電機軸系粘性阻尼系數、軸系摩擦力矩、主迴路蓄能器迴路液壓泵馬達內泄漏系數、蓄能器氣體容積、液壓缸柱塞粘性阻尼摩擦系數以及不同運行樓層工況等參數對系統特性的影響；最後對軸向柱塞泵馬達的流量壓力脈動對電梯轎廂速度的影響和蓄能器內油液體積損失機理進行了理論研究。
  9. 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。
  10. According to the integral characteristic of pvdf film, two pvdf sensors are designed to measure adjoint coefficient of sound radiation mode in this paper. based on the theory of sound radiation and two - dimensional modal sensors equation, and taking a simply supported plate as example, we measure mode l, mode 2 and mode 3 adjoint coefficient of its sound radiation by the sensors

    本文是在聲輻射模態理論以及兩維分散式壓電傳感器方程的基礎上，利用pvdf獨特的積分特性，以簡支矩形板為例，設計了pvdf壓電薄膜傳感器用於測量簡支板第一、二、三階聲輻射模態伴隨系數。
  11. The exact expression is obtained by integration method for a tightly wound rectangular solenoid of finite length, the result is plotted and discussed

    通過直接積分得到了有限長密繞矩形螺線管自感系數的精確表達式，並對結果進行了圖示和討論。
  12. In 6. 635, topics covered include : special relativity, electrodynamics of moving media, waves in dispersive media, microstrip integrated circuits, quantum optics, remote sensing, radiative transfer theory, scattering by rough surfaces, effective permittivities, random media, green ' s functions for planarly layered media, integral equations in electromagnetics, method of moments, time domain method of moments, em waves in periodic structures : photonic crystals and negative refraction

    本課程所覆蓋的論題包括：狹義相對論、運動媒質的電動力學、色散媒質中的波、微帶集成電路、量子光學、遙感、輻射傳輸理論、粗糙表面上的散射、有效介電系數、隨機媒質、平面層狀媒質的格林函數、電磁學中的積分方程、矩量法、時域矩量法、周期結構中的電磁波：光子晶體和負折射率。
  13. The moment method is used to calculate the rcs of three - dimensional targets in this paper. these targets include conducting targets, dielectric targets and coat targets. triangular patches are used to model the surface of the target, then electric field integral equation ( efie ) and magnetic field integral equation ( mfie ) are built which satisfy the boundary conditions. the rwg vector base functions are used to denote equivalent electric current and magnetic current on the surface of the target. finally use the galerkin method ( rwg vector base functions are basis function and test function ) to transform integral equations into matrix equation. when obtain the equivalent electric current and magnetic current, we can calculate the scattering field and the rcs of the target

    本文利用矩量法計算了三維導體目標、介質目標、塗層目標的雷達散射截面。首先採用三角形面元對物體表面幾何形狀進行模擬，然後建立滿足邊界條件的電場積分方程（ efie ）和磁場積分方程（ mfie ） ，將物體表面的等效電磁流用rwg矢量基函數表示，最後利用伽略金法（ rwg矢量基函數既作為基函數又作為檢驗函數）將電磁場積分方程轉化為矩陣方程求解未知電磁流系數，得到了表面的等效電磁流后，可以計算散射場和目標的雷達散射截面。
  14. Instead, there needs to store only the original coefficient matrix, some auxiliary matrices for the preconditioner and several vectors in the iteration methods. further, the core of the iteration is the matrix - vector multiplication and the solution of the auxiliary equations corresponding to the preconditioner. if the solution of the auxiliaries spend not very much, the computational cost in each iteration step will be very cheap, due to the fact that the sparsity of the matrix can be exploited sufficiently

    與直接法相比，迭代法只需存儲原系數矩陣、對應于預處理的幾個輔助矩陣與少量幾個向量，且迭代中除求解輔助線性方程組外，其餘的計算主要是稀疏矩陣與向量乘積，從而能充分利用稀疏性減少計算量，但迭代法的收斂速度一般與系數矩陣的譜分佈有關。
  15. A new method to build the semi - quantitative system relating matrix was advanced, it was constructed via the dynamic envelopes, which were built by gm ( 1, 1 ) based on the qualitative binning of observing data current of part variables, and its elements were calculated by the ratio of variable states ' corresponding areas in the dynamic envelopes

    為了實現這一目標，一種新的系統半定量關聯矩陣的構建方法被提出，它以系統部分變量觀測數據流的定性劃分為基礎，應用灰色gm （ 1 ， 1 ）模型建立其系統動態包絡，並以動態包絡中變量各種狀態的對應面積之比作為它們的關聯系數。
  16. In this paper, based on integrated solution of differential equation, we derived simple and analytical expression of elements of sentivity matrix and formed imaging equations

    本文從微分方程的積分解出發，推導了表達式極為簡單的三維雅可比系數矩陣，構造了成像方程。
  17. In this part we start form the magnetic field integral equations ( mfie ) and then establish the matrix equations for the unknown magnetic currents on the surface of slot aperture. to solve this problem, piece - wise sinusoidal basis and galerkin ' s method are used

    首先，利用理想縫隙假設建立關于縫隙內外口面磁流密度的磁場積分方程，然後採用分段正弦基galerkin方法將積分方程離散為關于展開系數的矩陣方程。
  18. It is a new truly mesh - less method, because the background cells for integration are not needed. it uses the weighted function of gaussian or of spline as a test function of the weighted residual method

    這種方法採用高斯權函數或樣條函數作為加權函數；同時這種方法只包含中心在所考慮點處的規則局部區域上以及局部邊界上的積分；所得系數矩陣是一個帶狀稀疏矩陣。
  19. To obtain the fast matrix - vector multiplication algorithm, we approximate the kernel function with piece - wise polynomial and get the approximate coefficient matrix a using the approximate kernel function. let n be the number of quadrature points and k2 be the number of interpolating knots at each subdomain. it is proved that the construction of a and the matrix - vector multiplication ax require o ( nk ) operations respectively

    我們利用對核函數進行分片多項式插值逼近得到適用於快速方法的近似系數矩陣a ：矩陣a的計算和矩陣-向量相乘ax各需要o （ nk ）次運算，存貯a需要佔用o （ nk ）內存，其中n為積分節點的個數， k ~ 2為每個小區域的插值節點數。
  20. On the basis of analysis previous experiment data, it is conclusion that allowable value of drift angle of elastic and elastic - plastic is 1 / 550 and 1 / 75 respectively, which is applicable to r. c. frame structure with special - shaped column is given out. the conclusion explains that the deformabiliry of r. c. frame structure with special - shaped column lies between rectangle column frame structure and shear wall structure. the calculating formula of allowable value of axial load ratio of special - shaped column is derived, it is compared with that of equaling areas rectangle column

    根據對前人試驗數據的統計分析，給出了適用於異形柱框架結構的彈性和彈塑性層間位移角限值分別為1 550和1 75 ；指出了異形柱框架結構的層間變形能力介於普通矩形柱框架結構和剪力墻結構之間；以t形柱為例，推導了異形柱軸壓比限值的計算公式，通過與等面積矩形柱的對比分析，認為異形柱的軸壓比限值與其截面尺寸的比例關系有關；當腹板受壓或翼緣受壓時， t形柱軸壓比限值存在較大差異；不同的荷載角作用，軸壓比限值變化較大；矩形柱的軸壓比限值要大於異形柱的軸壓比限值。
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