approximation coefficient 中文意思是什麼

approximation coefficient 解釋
近似系數
  • approximation : n. 1. 接近；近似。2. 【數學】近似值。3. 概算，略計。
  • coefficient : adj. 共同作用的。n. 1. 共同作用；協同因素。2. 【數，物】系數，率；程度。
  1. Angular distributions for some interesting states of 12b and 13c have been experimentally measured in hb ( d, p ) and 12c ( d, p ) reactions. the density distributions, rms ( root mean square ) radii, contributions of outside nucleon, etc., of the valence neutrons in these states are extracted by dwba ( distorted wave born approximation ) method and anc ( asymptotic normalization coefficient ) method, respectively

    實驗測量了11b （ d ， p ）和12c （ d ， p ）反應中12b和13c幾個感興趣的核態角分佈，分別用dwba方法和anc方法從角分佈數據中抽取了各核態外層中子的密度分佈、 rms半徑以及外層核子的貢獻等，對這兩種方法作了比較。
  2. In semi - fragile image watermarking algorithm, a robust watermark and a fragile watermark are extracted from the third approximation coefficient of wavelet transform of the original image. the two watermarks are embedded into the third vertical and horizontal detail coefficients. when authenticating image, image can be authenticated correctly and attacked parts can be localized through comparing the original watermarks and extracted watermarks

    其中，完全認證方法，利用qr分解的特性把圖像的邊緣信息嵌入到載體圖像中，演算法對各種攻擊都具有很好的敏感性;內容認證方法，從載體圖像中提取出一個脆弱水印和一個魯棒水印，並把它們重新嵌入到載體圖像中，認證時，通過兩個水印在圖像傳輸前後的變化情況來對圖像的保留價值進行評估，並準確定位受攻擊部位。
  3. In the section 2, firstly based on the diffusion approximation theory, the temporal characteristics of the reflectance and the transmittance were theoretically analyzed in turbid tissues ; secondly, the curves were simulated that the intensity and the pulse shape of the time resolved reflectance and transmittance versus the absorption a, the scattering s and the anisotropy coefficient g in two different boundary conditions : semi - infinite turbid media and homogeneous slab ; at last, the optical properties can be derived from the curves ; in the section 3, the conditions of ultra short laser pulses of different pulse - width and shapes has been theoretical analyzed and calculated, besides, the simulated the curves of the intensity and pulse shapes of the reflectance and transmittance in a homogeneous slab are obtained for use and future studying

    第二章中首先根據漫射近似理論對超短脈沖在以生物組織為典型的混濁介質中傳輸進行了理論分析，然後對兩種邊界條件下產生的漫反射、漫透射光脈沖強度和形狀隨各光學特性參數的變化情況進行了數值模擬，最後得到了混濁介質的光學特性參數與漫反射、透射脈沖強度與形狀的關系曲線。第三章對不同形狀和脈寬的脈沖光源入射到混濁介質中產生的漫反射、漫透射脈沖的強度和形狀進行了理論分析和數值模擬，並將高斯脈沖與方波脈沖情況進行了對比，得到了各種情況的漫反射、漫透射脈沖強度、形狀與各光學特性參數的關系曲線，這對從分析脈沖形狀中提取介質的光學特性參數的信息有重要的意義。
  4. The various medium parameters have different influence on the reflection of the laser pulse. based on the diffusion approximation theory, the boundary condition of semi - infinite homogeneous media, the influence of the absorption a, the scattering s and the anisotropy coefficient g on the ultra short laser pulse of different pulse - width and shapes has been researched

    論文對超短脈沖在混濁介質中的傳輸進行了理論分析和數值模擬，並在不同脈寬的高斯脈沖和方波脈沖入射到混濁介質的漫反射、漫透射脈沖強度和形狀進行了理論分析和數值模擬，得到了它們與各光學特性參數的關系曲線。
  5. The results demonstrate that the theory predicted values of compression, bulk modulus, linear expansion, and thermal expansive coefficient of compressed solids are very agreement with the corresponding experimental data. in summary, the error with respect to theory prediction and its causes are pro bably analyzed in detail. the discussion suggests that the function of the phenomenological short - distance repulsive force constant a ( v ) and approximation for anderson - griineisen parameter 5t ( v ) proposed in this paper are valid and applicable in high pressures ( up to loogpa ) and high temperatures ( from debye temperature 0d to melting temperature tm ) for many types of solids

    在本文最後一節，為了驗證固體在等壓過程中anderson grhneisen參量乓與體積膨脹的唯象假設：乓久w兀的有效性，及由此假設而推導出來的等壓態方程的廣泛應用性，本論文主要針對十六種堿金屬鹵化物、三種堿性氧化物、三種硅酸鹽礦物質的線膨脹八n 、體積熱膨脹v vo （ n 、熱膨脹系數a （ n 、體積彈性模量肘d等隨溫度的變化作了理論上的預測，且與相應的實驗數據作了比較與分析
  6. Combining with practical investigation and analysis, the author presented the fitting equation of the second non - uniform coefficient in which the method of least squares error approximation with the power index regression is used and proposed a modified formula for flow rate per second calculation to precisely determine the size of pipeline and to make the design advanced in technology and reasonable cost

    本課題分析了室外和室內的設計流量公式，通過調查、實測本地區的水量資料，運用相關數學方法分析，提出了適合小區給水管網採用的流量公式。
  7. In chapter three, the momentum integral equations and their solutions of two - phase fluids in boundary layer are given and the no - disturbance solutions on the surface of vane are required. leading into the disturbance factor of no - dimension and thickness coefficient ks in boundary layer, the numerical method of finite approximation is used to calculate the boundary layer

    第三章給出了固液兩相流泵的邊界層動量積分方程及其解的一般表達式，並得到葉片表面的無擾動解；引入了無量綱擾動因子及邊界層厚度系數k _ ，給出了用於邊界層計算的有限次逼近的計算方法。
  8. Judging by the different magnitude and direction of the wavelet packet coefficient modular maximum, we can select the single phase - to - earth line. the method using wavelet singularity detection theory to extract the fault time is discussed. a fault distance measurement algorithm combining wavelet analysis used for separating the character from the transient fault signal with artificial neural networks used for the nonlinear approximation from the transient character to fault distance is presented

    論文提出利用各個出線零序電流在頻帶上小波包系數模極大值的方向和大小的不同來實現故障選線，討論了利用小波分析的奇異性來判斷故障啟動時刻，提出將小波分析和人工神經網路結合，利用人工神經網路的非線性逼近能力，實現故障暫態量到故障距離的非線性映射，完成測距。
  9. Asymptotics of coefficient polynomials of cubic hermite - pad approximation to e - x

    逼近系數多項式的漸近估計
  10. The fast spot price solution proposed in this paper introduces a decomposing model, which is benefit for analyzing each component of spot price. based on interior - point optimal power flow, which has superiority on calculating and decomposing spot prices under power market environment, after rational approximation, the coefficient matrix and its factor table of modifying equation are made constant and need no recalculation during iterations

    本文提出的快速實時電價演算法採用適于對實時電價各組成部分進行分析的分解模型，在內點法最優潮流的基礎上合理的常數化其修正方程系數矩陣，使其在每次迭代時不必重新計算，大大提高計算速度。
  11. This paper studied zero - velocity correct technology for ins, based on analysis of ins error equation, it concluded the method by which we can use ins velocity output to estimate the attitude angle error when the vehicle halted, then it contrasted two schemes of conic approximation of attitude angle error and put forward a method to decide the approximation coefficient by time range

    本文首先研究了車載捷聯慣導系統（ ins ）的零速修正技術，在分析捷聯慣導系統誤差方程特點的基礎上，推導了停車時利用ins速度輸出估計姿態誤差角的方法，並對用二次曲線擬合姿態誤差角的兩種方案作了比較，提出了按時間分段確定擬合系數的方法。
  12. It gives a new expression method for the solution of often coefficient linear siuu1taneous differential equation, with the aid of uneven sublinear system of equations ' s standard base solution matrix nature, gradually approximation, derivative principle, the text give the limited form of this system of equations solution and the developments for the contents of literature

    摘要提出了常系數線性微分方程組解的新的表達方式，藉助齊次方程組的標準基解矩陣的性質、逐步逼迫法、導數法則，給出了這個方程組解的有限形式。
  13. To illustrate the superiority of this type of transition, the author adapted the local normal mode ( lnm ) based on couple - mode theory to explain the coupling between two lowest order modes along the transition. for the two important parameters, propagation constants difference between the two modes apy and mode coupling coefficient cy, which denoting power coupling between lnms, the approximation expressions using structure parameters were worked out. then the author compared three typical different transitions according to the demanding of power coupling, at last concluded that the parabolic - type transition can transport the light in shortest length with lowest loss

    對于表徵局部標準模之間功率耦合的兩個重要的參數_ （ ij ） （模式傳播常數差）和c _ （ ij ） （模式耦合系數） ，推導了用器件結構參數表達的近似公式，然後根據功率耦合的需求，在常見的三種不同輪廓的過渡區之間進行了比較，得出了拋物形輪廓過渡區能夠使光束在最短尺寸內以最低損耗通過波導的結論。
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