有理近似法 的英文怎麼說

中文拼音 [yǒulǐjìnsìfǎ]
有理近似法 英文
rating approximation
  • 有 : 有副詞[書面語] （表示整數之外再加零數）: 30 有 5 thirty-five; 10 有 5年 fifteen years
  • 理 : Ⅰ名詞1 （物質組織的條紋） texture; grain （in wood skin etc ） 2 （道理;事理） reason; logic; tru...
  • 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...
  • 法 : Ⅰ名詞1 （由國家制定或認可的行為規則的總稱） law 2 （方法; 方式） way; method; mode; means 3 （標...
  • 有理 : 1 （有道理） reasonable; justified; in the right 2 [數學] rational; 有理函數 rational function; ...
  • 近似 : approximate; similar; approach; approximation; roughness; propinquity
  1. Optimized association rules are permitted to contain uninstantiated attributes. the optimization procedure is to determine the instantiations such that some measures of the roles are maximized. this paper tries to maximize interest to find more interesting rules. on the other hand, the approach permits the optimized association rule to contain uninstantiated numeric attributes in both the antecedence and the consequence. a naive algorithm of finding such optimized rules can be got by a straightforward extension of the algorithm for only one numeric attribute. unfortunately, that results in a poor performance. a heuristic algorithm that finds the approximate optimal rules is proposed to improve the performance. the experiments with the synthetic data sets show the advantages of interest over confidence on finding interesting rules with two attributes. the experiments with real data set show the approximate linear scalability and good accuracy of the algorithm

    優化關聯規則允許在規則中包含未初始化的屬性.優化過程就是確定對這些屬性進行初始化，使得某些度量最大化.最大化興趣度因子用來發現更加有趣的規則;另一方面，允許優化規則在前提和結果中各包含一個未初始化的數值屬性.對那些處理一個數值屬性的演算法進行直接的擴展，可以得到一個發現這種優化規則的簡單演算法.然而這種方法的性能很差，因此，為了改善性能，提出一種啟發式方法，它發現的是近似最優的規則.在人造數據集上的實驗結果表明，當優化規則包含兩個數值屬性時，優化興趣度因子得到的規則比優化可信度得到的規則更有趣.在真實數據集上的實驗結果表明，該演算法具有近似線性的可擴展性和較好的精度
  2. In the present study, eighty - one species of suborder flabellifera are found and described, of which 13 are new species and the other 29 species are recorded for the first time from chinese waters. key to chinese families and genera are provided. discussion on taxonomic problems is given and brief notes of the distribution are provided

    本文以傳統的形態分類為主，結合現代分類學的手段和方法解決近似種、疑難種的準確鑒定問題，搞清中國的屬種及分類上存在的錯誤和混淆，並結合已有的此類群研究結果，進行地理區系的比較。
  3. Based on the correct evaluation of the means and covariance of the measurement error in cartesian coordinate system, the algorithm processes the radar measurements sequentially, and the linearization of measurement equation is no longer neccessary

    作者推導了有測速數據時的去偏轉換卡爾曼濾波演算法。此演算法估計精度和計算效率比以前的方法有較大改善，對測量方程不做近似處理。
  4. The discussion of main parallel technologies on construction of parallel sliq algorithm is presented in this paper. the computing result of algorithm complexity of sequential and parallel algorithm indicates : when the data set is large enough, as to continuous attributes, the parallel algorithm almost get speedup value equal to the number of processors ， while as to categorical attribute the improvement of parallel algorithm is limited

    通過對串列和并行演算法時間復雜度的計算表明，當數據集充分大時，由於連續屬性的排序計算操作分散到各個處理機單元上進行，顯著降低了計算時間，從而可以得到近似於處理機個數的加速比，對于離散屬性，本并行演算法對串列演算法的性能提高有限
  5. In order to calculate easily and do n ' t influence the single - chip microcomputer ' s calculate velocity, we put forward two scheme to deal with the numerical value, one is to use a simple function to close or approach a normal function f ( x ) ( mainly is lagrange ' s intepolation, newton ' s intepolation, hermite ' s intepolation, cubic spline interpolation, etc. ) the other one is function approach ( mainly is chebyshev ' s polynomic. legendre ' s polynomic, laguerre ' s polynomic, method of least squares, etc. ), we analyze and compare the lagrange ' s intepolation and chebyshev ploynomic, at last, we select the chebyshev polynomic to do the value calculating on single - chip microcomputer

    提出了數值處理的二種方案。即用簡單函數近似或逼近一個一般函數f （ x ） （主要有拉格朗日插值、牛頓插值、埃爾米特插值、三次樣條插值等）和函數逼近（主要有切比雪夫多項式、勒讓德多項式、拉蓋爾多項式、最小二乘法等） ，對上述兩個方案中的典型函數?拉格朗日插值和切比雪夫多項式進行了分析比較，最後選取切比雪夫多項式完成單片機上的數值計算。
  6. But, the eeg signal that we can acquired is very weak and is badly contaminated by strong background noise, such as electrooculogram ( eog ), electrocardiogram ( ecg ), and line noise ( 50hz or 60 hz power frequency interference ), etc. eeg is a typical non - stationary random signal with a certain extent of non - gaussian and non - linear character

    但是我們能夠獲得的腦電信號一般非常微弱、並伴有很強的背景噪聲，是一類典型的非平穩的隨機信號，且存在一定的非高斯性和非線性。傳統的分析處理方法一般將腦電信號近似認為是線性的準平穩的高斯分佈隨機信號，這使得分析結果往往不能令人滿意、實用性差。
  7. In the experiment, we use the he - ne laser and the semiconductor laser as the source, record the bessel beam patterns behind the axicon by using a digital camera and a microscope, measure the radius of the bessel beam central spot by film - scanning and measure the effect of both the radius of the aperture and the open angle of the axicon on the maximum non - diffraction distance. the experiments show that a specific propagating range has constant power and the beam has a bessel - like distribution in this range. the results agree with the beam corresponding to a diffraction free beam

    同時我們還採用膠片掃描的方法測量了無衍射光束的中心光斑尺寸，測量了不同光闌孔徑和不同稜角情況下的最大無衍射距離和傳播軸附近橫截面內微小光孔中的光強，實驗結果顯示當激光光束經過軸棱錐轉換後有一段距離功率變化很小，且分佈近似貝塞爾分佈，符合無衍射光束的特性;經過聚焦后，呈現三維分佈中空的光束bottlebeam ，實驗結果與理論分析基本吻合。
  8. Users of the preliminary edition ( now out of print ) will be interested to note several new chapters on complexity theory : chapter 8 on space complexity ; chapter 9 on provable intractability, and chapter 10 on advanced topics, including approximation algorithms, alternation, interactive proof systems, cryptography, and parallel computing

    早期版本的讀者將驚奇的發現新增的有關復雜性理論的章節：第8章，空間復雜性；第9章，不可證明性；第10章，高級話題，包括近似演算法，交替，交互推理系統，密碼學和并行計算。
  9. For the purpose of discovering the near - globally optimal solution, this paper proposed a hybrid approach of ant colony algorithm and sequential quadratic programming ( sqp )

    摘要為了獲得整體近似最優解，提出採用蟻群演算法，搜索發電機可運行狀態的最優組合，並對蟻群演算法的數學模型進行分析，以參數的形式給出具有普遍意義的收斂性定理。
  10. Obvious deviation from experimental observations is caused since many - body and multipolar effects are neglected in this approximation. we proposed a dipole - induced - dipole ( did ) model based on a multiple image method to deal with multipolar interaction in er fluids

    本文中，我們採用多重鏡象法近似處理顆粒間的多極矩相互作用，建立了研究er流體基態問題的did模型，並將它應用於顆粒具有一定分佈的多分佈er流體。
  11. The basic thought is to divide the cities which are close to each other into a group ( physical area ) by applying sorting neural network, find out the optimal path by the improved hnn, and then calculate the local optimal path by using the same method, and finally get the whole optimal path, which are described as following : a assembly s of cities is grouped into some subsets according to their physical location and we can get, and then get the optimal, path of tsp of s = { s, i = 1, 2, n } through the given method, as well as the st

    基本思想是利用聚類神經網路先把地理位置上相互靠近的城市劃分為一個集體單位（一個物理區域） ，用改進的hopfield神經網路演算法求解各個區域間的最優（或近似最優）路徑，然後再在每一個區域內部用同樣的方法來求解其局部的最優（或近似最優）路徑，這樣可以最終得到全局的最優（或近似最優）解。描述如下：設有城市集合s ，按城市的地理位置把s劃分為若干子摘要2集，得s ijs ， ，其中廠s ； d ， i一口求得集合i叫s s ； i習， 2 ， … n的tsp最優路徑，再依次求得子集s ；內部的tsp最優路徑，即得最終優化路徑m一） s一） …一寧s ； di
  12. For the first time we investigate detailedly on the theory of the conductor - centered arbitrarily - shaped helical groove structure. we divide the arbitrarily - shaped helical groove into many consecutive small rectangle area to approximate the original groove. the recurrence relation of the admittance is obtained

    首次對具有中心導體軸的任意槽形螺旋槽結構的普遍理論進行了研究，通過以多層矩形階梯來近似代替任意形狀槽的邊界的方法，同時對導納的遞推關系進行了詳細的推導。
  13. A new type of viscoelastic stochastic finite element method is established using first - order perturbation theory based on local averaging method of random field and karhunen - loeve expansion theory of random process. the amount of computations is greatly reduced by transforming correlated random variables to a set of uncorrelated random variables. the relations of different random response variables are analyzed and monte carlo simulations for viscoelastic stochastic structures are investigated

    基於隨機場的局部平均法以及隨機過程的karhunen - loeve分解理論，通過一階隨機攝動方法建立了考慮材料近似不可壓縮的粘彈性隨機有限元公式，由相關結構分解減少計算量，分析了各結構隨機響應量之間的關系，給出了數字特徵的計算方法，研究了粘彈性隨機結構的montecarlo模擬驗證方法。
  14. Characterizing and analyzing the dynamic properties of the humanoid - robot is one of the key problems in the research field of robot. but at present, the existing mo - deling methods of the humanoid - robot dynamics are based on the theory of traditional multi - rigid - body dynamics, and usually simplifying the system as framework with multi - rigidity poles and simplex joints. for this reason, the walking dynamic perform - ance of the humanoid - robot is pictured only approximately by these methods

    精確地描述和分析系統動力學特性一直是仿人機器人研究方向需要解決的關鍵課題之一，而至今為止，針對此系統的已有建模理論和方法一般是以其結構剛性桿件簡化，以及將桿件以單純鉸鏈聯結成「骨架」為前提，建立在傳統多剛體動力學理論基礎上，這些研究成果由於結構的簡化和多剛體理論的局限，只能近似地反映仿人機器人系統的步行動力學特性。
  15. In order to predict hydrodynamic characteristics a computational system is developed including determination of the pressure distribution on a wing section by use of the conformal mapping method and panel method respectively and of the flow in boundary layer according to the thin shear layer approximation ( tsl ) for navier - stokes equation approach. the wing sections of naca4412 and naca0012 are applied to test the computational system. the numerical inspection shows that the panel method with better precision and the momentum and the displacement thickness of boundary layer can be used to complete this calculation

    本文分別用守屋的保角變換法和基於源匯渦分佈的面元法，建立了計算槳葉表面壓力分佈的數學模型；應用納維-斯托克方程的薄層近似理論模式和有限差分數值方法，建立了計算機翼表面邊界層內部流動的數學模型；應用槳葉表面邊界層內部粘性流動和外部勢流流動在邊界上的匹配演算法，建立了槳葉表面二相流流動的計算方法和相應的計算機程序。
  16. 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。
  17. Using the theories of probability, algebra and number theory comprehensively, we investigate a class of boolean functions with three - valued walsh spectrum in the first part of this dissertation : the properties of the extended semi - bent functions, which are constructed from any two bent functions, are studied, followed by the structure characteristics of the boolean functions satisfying propagation criterion with respect to all but two vectors ; the definition and cryptographic properties of k - order quasi - bent functions are proposed whose walsh spectrum takes on only three values. some sufficient and necessary conditions are offered to decide whether a boolean function is a k - order quasi - bent function ; a special method is presented to construct the k - order quasi - bent functions, whose cryptographic properties are explored by the matrix method, which is different from the method of walsh spectrum and that of autocorrelation of boolean functions ; the application of this kind of boolean functions in the fields of stream cipher, communications and block ciphers is discussed, which shows the great importance of the fc - order quasi - bent functions ; some methodology are proposed to construct the k - order quasi - bent functions, including the complete construction by using the characteristic matrices of boolean functions, and the recursive method by two known k - order quasi - bent functions we further extend our investigation to the ring zp, where p is a prime, and the similar results are presented as far as the p - valued quasi - generalized - bent functions are considered

    本文首先綜合運用概率論、代數學、數論等基礎學科的理論知識，並以頻譜理論作為主要研究工具，對一類譜值分佈相對均勻的函數? ?廣半bent函數、 k階擬bent函數和p值k階擬廣義bent函數進行了系統、深入的研究，給出了廣半bent函數定義，並探討了廣半bent函數的密碼學性質；給出了k階擬bent函數和p值k階擬廣義bent函數的定義及等價判別條件；討論了k階擬bent函數和p值k階擬廣義bent函數與部分bent函數和p值廣義部分bent函數的關系，探討了它們的密碼學性質；給出了k階擬bent函數和p值k階擬廣義bent函數的典型構造方法，並將對k階擬bent函數的密碼性質的研究轉化到對一類特殊的矩陣的研究上；利用布爾函數的特徵矩陣原則上給出了k階擬bent函數的一種完全構造方法，還給出了從已有的p值k階擬廣義bent函數出發，遞歸構造變元個數更多的p值k階擬廣義bent函數的方法；初步探討了k階擬bent函數在序列密碼、分組密碼以及通信中的應用；給出了一類布爾函數walsh譜的分解式，並利用這類布爾函數的walsh譜分解式給出了一類近似穩定的布爾函數的構造，特殊情形下為k階擬bent函數；利用代數數論的知識考察了p值k階擬廣義bent函數的譜特徵，並給出了k階擬廣義bent函數與所有仿射函數的符合率特徵等等。
  18. The water quality respond relation of input - output measurements are established by systematic theory in this paper. according to the peculiarity of hydrology and the necessity of water quality inverse problem the multi - parameter inverse problem model based on ordinary differential equation is developed. the existence and uniqueness of the solution of the ordinary differential equation about two parameters or multi - parameter are to be proved. the unstability depending on errors between monitoring data and interpolation approximate data are analyzed and demonstrated. cubic spline interpolation function, the least two multiply and positive rule method are conjoined for obtained solution of multi - parameter. the results from this algorithm indicats its efficient to the multi - parameter identification in water quality modeling

    本文應用系統理論，建立了水質多參數輸入輸出之間的響應關系；根據河流水文水質變化特點和參數反問題的需求，建立了水質常微分方程多參數反問題模型.根據常微分方程參數反問題的數學理論，作者給出了兩參數和多參數水質常微分方程反問題的解的存在性、唯一性的理論證明過程和結論；還針對水質現有監測資料的測驗誤差和插值近似計算誤差造成參數反問題的不穩定性，將三次樣條插值函數、超定方程最小二乘法和正則化演算法有機地結合使用，成功地給出了水質參數反問題的穩定化演算法.最後給出了應用計算結果
  19. The other, called " integral method ", is got by converting the problem to degree reduction of bi - variable polynomials with upper bounds using approximation theory and the relationships between chebyshev bases and bernstein bases

    另一個是將問題轉化為二元多項式的保上界降階問題，再由近似逼近理論和chebyshev基與bernstein基的轉換關系，求得區間有理bezier曲面的降階逼近的「整體法」 。
  20. The first section introduces the background, significance and the relative development of the dissertation. then the roughness of rough surface and the basic theories of the scattering of electromagnetic waves from rough surfaces are discussed, and the kirchhoff approximation and small perturbation method are presidented in detail

    然後介紹了描述隨機粗糙面的有關統計特性參量，給出了處理粗糙面散射問題的不同方法，指明了各自的適用條件，並對經典粗糙面電磁散射的kirchhoff標量近似法和微擾法做了詳細闡述。
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