近似修正 的英文怎麼說

中文拼音 [jìnsìxiūzhēng]
近似修正 英文
approximate correction
  • 近 : Ⅰ形容詞1 （空間或時間距離短） near; close 2 （接近） approaching; approximately; close to 3 （親...
  • 修 : Ⅰ動詞1 （修飾） embellish; decorate 2 （修理; 整治） repair; mend; overhaul 3 （寫; 編寫） write;...
  • 正 : 正名詞（正月） the first month of the lunar year; the first moon
  • 近似 : approximate; similar; approach; approximation; roughness; propinquity
  1. Abstract : the effect of correction of self - consistent potential on electronic structure in simple cubic nanocrystal particles is calculated by means of the green ' s function method in the tight - binding approximation, taking only the nearest neighbor matrix elements into account. the numerical results show that the electronic energy spectrum is shifted, the chemical potential is not equal to the atomic energy level, the electronic density at each lattice point is changed, and the variation of electronic density at surface lattice point is the largest

    文摘:在緊束縛近似下，只計及最近鄰的矩陣元，採用格林函數計算了自洽勢修正對簡立方納米晶體顆粒的電子結構的影響，發現電子能譜發生了移動，化學勢不等於格點原子能級，各格點的電子密度也發生了變化，其中以表面格點的電子密度變化最大。
  2. Very accurate predictions of planetary orbits require corrections to the central-field approximation.

    想要非常準確地預言行星的軌道，就需要對中心場近似進行修正。
  3. A real rough set space and the concepts of real lower and upper approximation corresponding to real - valued attributes is studied. a rhombus neighborhood for som is proposed, and the combination of som and rough sets theory is explored in the dissertation. according to the distance between the weight of winner node and the input vector in the real rough sets space, some new weights learning rules are defined

    本文提出採用菱形鄰域代替一般的方形鄰域，可以減少待修正權重的數目;並利用實數粗糙空間的下、上近似集的精確概念劃分自組織映射的輸出結果，使得改進后的映射結果中各類樣本點之間有明顯的間隔，易於進行分類識別。
  4. Following is our main work and important conclusions : ( 1 ) the question of energy spectrum hardening. we used the klein - nishina ' s differential scatter formula, meanwhile utilize the thaler progression to spread out, and neglected the high - power, and then we deduced a theoretical formula of correction of energy spectrum hardening

    其主要工作和結論如下： （ 1 ）對x射線能譜硬化問題，把klein - nishina微分散射方程，利用泰勒級數展開，在忽略高次項的情形下，近似地推導出了能譜硬化修正公式。
  5. The optical - limit glauber theory has been of great success in describing the stable nucleus scattering at high energies. as it is extended to the nucleus scattering at low and intermediate energies, the modification of the coulomb field to the effective impact parameter and the diffuseness of the nucleon - nucleon ( n - n ) scattering in the forward direction has to be taken into account

    其中光學極限近似的glauber模型能很好地描述高能小角度的穩定核散射，進一步推廣應用於研究中低能穩定核散射時，需要考慮庫侖相互作用對有效碰撞參數的修正和核子?核子兩體散射在朝前方向的彌散。
  6. For the stress analysis of dryers under the line load of supporting rollers, according to hoff theoretical solution of thin cylindrical shell under line loads, mangelsdorf approximate solution is modified on the basis of the calculation analysis for 14 sets dryers " dimension by computer programming with matlab software. the approximate formulas of the second largest hoop stress of the middle section of the shell are derived

    針對托輥線壓載荷作用下烘缸的受力分析，本文根據薄壁圓柱殼在線壓載荷作用下的hoff理論解，在運用matlab軟體對14組常用烘缸參數進行編程計算分析的基礎上，對mangelsdorf近似解作了修正，並由最小二乘法導出殼體中部截面環向應力次大值的近似計算式。
  7. To this end, some mild regularity conditions are imposed and an asymptotic distribution theory is established for modified statistic

    在適當的正則條件下，對修正的經驗似然比統計量給出了漸近分佈理論。
  8. The main contents are as follows : ( 1 ) by employing the direct method, the soliton periodic amplification system in optical fiber link with loss is considered, and the adiabatic solution ( slowly varying portion ) and first - order correction ( rapidly varying portion ) for a single soliton case are presented

    本文的主要內容如下： （ 1 ）利用直接擾動方法對周期放大系統進行了理論分析，給出孤子周期放大系統的絕熱近似解和一級修正解的積分表達式，結果分析表明孤子在放大過程中一部分能量以色散波的形式流失，而這一色散波主要由孤子周期放大系統的一級修正解來刻畫。
  9. In this thesis, studies are made on the problem of time - harmonic electromagnetic fields excited by an arbitrary current dipole in spherical conductor. the problem is presented in eddy - current nondestructive test and geophysical prospecting. under the condition of magnetic quasi - static state, the boundary - value problem about modified magnetic vector potential is solved and the analytical solution is obtained

    本論文針對渦流無損檢測和地球物理勘探領域用到的球導體中時諧電流元的電磁問題做了研究，在磁準靜態近似下，求解了修正磁矢量位的邊值問題，獲得了問題的解析解，並利用通用有限元分析軟體做了數值驗證。
  10. To meet the need of settlement calculation with fem when absence of laboratory triaxial test data in common road engineering, methods of determining the five parameters included in tangential elastic module through soil routine tests and the related emendation coefficient are given. at the same time, one approximately substituted formula for tangential poisson ratio is also developed, which is suitable for both sandy soil and cohesive soil. ( 3 ) research on main parameters modification of duncan - chang model based on the improved bp network

    對於一般道路工程中不做三軸試驗但須進行沉降有限元計算的情況，給出了依據土體常規試驗的切線彈性模量確定方法和相關修正系數，同時也提出了對砂性土和粘性土均適用的切線泊松比的近似替代式子； （ 3 ）基於改進的bp網路對鄧肯張模型主要參數修正研究。
  11. Reference to the convention means of the analysis and research for energy spectrum hardening and photon scattering in internal and external, and based on the physical mechanism of radial interacts with matter, this paper approximatively deduce a theoretical formula of correction of energy spectrum hardening and scattered radiation in transmission industrial x - ray computerized tomography from a ideal model. and presented a correction computer program

    本文在分析研究國內外有關射線能譜硬化和散射修正問題的分析方法及其研究狀況的基礎上，從射線同物質相互作用的物理學機理出發，從理論上近似推導了x射線能譜硬化和散射修正計算公式，建立了散射修正的分析模型，並編制了相應的計算機修正程序。
  12. A numerical approach and a novel analytical solver are used to solve the governing equation of cantilever beam actuated by electrostatic force, and dynamic responses of the cantilever are calculated by mode - superposition

    摘要給出了一種靜電力作用下微懸臂梁控制方程的數值求解方法，提出了求解該模型的近似解析式和修正解析式，並採用模態疊加法計算微梁的動響應。
  13. It is difficult to estimate indent depth in theory. this paper presents two methods to estimate the relationship between dent depth and contact force, respectively amend method and deflection compensate method, which are developed by using a clear geometrical relation to express indent, incursion profile and deflection difference

    本文以一種新的觀點，用一個明確的幾何關系來確定壓痕、壓頭與板的接觸面剖面及接觸中心點與邊界點之間的撓度差三者之間的關系，提出兩種近似預測接觸力與壓痕深度關系的方法? ?修正法和撓度補償法。
  14. In a word, a new method that theoretically calculates the relativistic corrections and the fine structure of the energy levels in two - electron atom, including the atomic hamiltonian expressed by spherical tensors, the calculation of the angular matrix elements and the summations over spin of the various interactions in the atomic hamiltonian, and the approximate calculation of the radial matrix elements, has been provided in this thesis

    總之，本文為雙電子原子能級的相對論修正和精細結構的理論計算提供了一種新的方法，包括原子哈密頓算符的球張量表示方法、原子哈密頓中各種相互作用項的角向矩陣元和自旋求和的計算方法，以及徑向矩陣元的近似計算方法
  15. Polynomial - time approximation schemes ( ptas ) : a ptas is a family of algorithm { a | > 0 } such that for any fixed > 0, a runs in time polynomial in the length of the input and gets a solution with an objective value which is at most 1 + e times of the optimum

    若每次修正後，實例的目標函數值不超過原來的1 + o （ ）倍，我們稱修正費用不超過1 + o （ ） 。 ptas演算法：若演算法列{ a _ }對于問題的任一個例子都是1 +近似演算法，計算次數是問題大小的多項式（將視為常數） ，稱它為ptas演算法。
  16. This thesis suggests a process considered minimizes the population size as similar individuals occur in the fitter members of the population, which helps reduce the execution times for ga by removing the redundancy associated with the saturation effect found in the later generation. this thesis uses a method that adds dynamic penalty terms to the fitness function according to the optimal degree of solutions, so as to create a gradient toward a feasible suboptimal or even optimal solutions. on the basis of the difference of the biggest and the smallest of fitness of individual, modifying the fitness function in order to convergence is a satisfaction

    動態調節種群大小，去掉遺傳演算法在迭代後期搜索產生的過多相似個體，達到減少計算時間的目的；按照解的優劣程度給適應度函數增加一個在ga搜索過程中動態改變的可變罰函數，給搜索最優解創造一個梯度，使遺傳演算法收斂到可行的較優解或最優解；根據適應度值最大和最小個體的差修正適應度函數，使適應度函數值適中不容易造成收斂太快、局部收斂或根本不收斂而變成隨機搜索；為了避免「近親繁殖」採用競爭擇優的交叉操作；利用并行遺傳演算法的思想，提出一種自適應多子種群進化策略；提出人口汰新政策來解決類似甚至相同的個體的情況發生。
  17. The second aspect : from qgp kinetic equations with collision integrals, by using the relaxation time approximation, we calculate the distribution functions to the second order correction. we obtain the distribution functions for quarks ( and anti - quarks ) and gluons under perturbation of the fluctuation of the color field. then in the high - temperature - low - density area, we discuss the characteristics of the distribution functions, and use t hem to get the net baryon density and the energy density

    第二，從有碰撞項的qgp動力論方程出發，忽略自旋，在色漲落擾動下，利用弛豫時間近似，得到夸克和膠子分佈函數的二級修正，通過數值分析重點討論了高溫低密情況下qgp中成分粒子分佈函數的特性，並且由分佈函數得到凈重子數密度和能量密度。
  18. The intracavity photon density and initial population inversion density are assumed to be gaussian distributions instead of plan wave assumption, based on this assumption, the rate equations of diode - pumped intracavity - frequency - doubled passively q - switched laser are modified. through solving these space - dependent rate equations numerically, the results under different assumption are compared. 5

    將腔內光子密度和初始反轉粒子數的平面波近似修正為高斯分佈近似，獨立地導出描述二極體泵浦內腔倍頻-被動調q激光器的速率方程，並通過數值求解該方程比較了兩種近似下脈沖特性的不同； 5 .實驗驗證了2中提出的實驗方案，並對實驗結果進行了分析。
  19. For lack of anthropometric datum about the elderly and the disabled, in chapter 2, according to a conclusion that senility of the elderly could result in some changes on body dimensions, the thesis amends " the human dimensions of chinese adults ", and approximately arrives at part human body dimensions of the elderly ; on the other hand, in view of some lower - limb disabled have strong dependence on wheelchair, the thesis gets to part approximate dimensions of lower - limb disabled in wheelchair by assuming that normal person sitting in wheelchair

    由於缺乏老年人和殘疾人人體測量方面的權威性統計數據，在第二章中本論文根據老年醫學資料中關于老年人的身體衰老而引起的人體尺寸變化的結論，對中國成年人人體尺寸進行修正，從而近似推出老年人的部分人體尺寸；由於乘坐輪椅的殘疾人對輪椅的依賴性很強，論文假設健全人坐在輪椅中，近似得到坐在輪椅中的下肢殘疾人的部分人體尺寸。
  20. Chapter 2 establishes the theoretical framework of a class of dual algorithms for solving nonlinear optimization problems with inequality constraints. we prove, under some mild assumptions, the local convergence theorem for this class of dual algorithms and present the error bound for approximate solutions. the modified barrier function methods of polyak ( 1992 ) and the augmented lagrange function method of bertsekas ( 1982 ) are verified to be the special cases of the class of dual algorithms

    第2章建立求解不等式約束優化問題的一類對偶演算法的理論框架，在適當的假設條件下，證明了該類演算法的局部收斂性質，並給出近似解的誤差界，驗證了polyak （ 1992 ）的修正障礙函數演算法以及bertsekas （ 1982 ）的增廣lagrange函數演算法都是這類演算法的特例。
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