polynomial是什么意思,polynomial中文翻譯,polynomial發(fā)音、用法及例句
?polynomial
polynomial發(fā)音
英:[?p?l?'n??m??l] 美:[?p?l?'no?m?rl]
英: 美:
polynomial中文意思翻譯
n. 多項式
adj. 多項的
polynomial常見(jiàn)例句
1 、Too high a degree polynomial produces lower residuals, but at the expense of smoothness in the derivative.───一個(gè)很高次數的多項式會(huì )產(chǎn)生較低的殘差,但卻要破壞導數的光滑性。
2 、In the Statistics area of the positionplot, click the Statistics Menu button and select "Curve Fit, Polynomial Fit"in the Statistics menu.───在位置曲線(xiàn)的統計區中,單擊統計菜單按鈕,并在統計菜單中選擇“曲線(xiàn)擬合,多項式擬合”。
3 、In this paper, by using the residue class ring of polynomial ring and the diagonalization of matrixa a fast algorithm for the inverse of r-circular matrices is derived.───單位:華南理工大學(xué)應用數學(xué)系廣東廣州510640;華南農業(yè)大學(xué)理學(xué)院廣東廣州510640;
4 、In NTRU public key cryptosystem,it is very important whether or not a polynomial has inverse.───在NTRU公鑰密碼體制中,一個(gè)多項式是否有逆多項式是一個(gè)很重要的問(wèn)題。
5 、HUANG Ai-ping, HU Rong.Channel estimation based on pilot and polynomial model [J].Acta Electronica Sinica, 2002,30 (4): 584- 586.───[3]黃愛(ài)蘋(píng),胡榮.基于導頻和多項式模型的信道估計[J].電子學(xué)報,2002,30(4):584-586.
6 、The numerical calculation resuits are oftained by means of approximate polynomial expression for Thomson's function.───借助thomson函數的多項式逼近式給出了本文方法的數值計算結果。
7 、Zernike polynomial fitting method and its application[J].───引用該論文 單寶忠,王淑巖,牛憨笨,劉頌豪.
8 、For polynomial fitting method, polynomial was changed into fitting curves of hyperbola, S-figure curve, converse exponential curve and logarithm curve, etc.───多項式擬合先將其化為雙曲線(xiàn)、S型曲線(xiàn)、倒指數曲線(xiàn)、對數曲線(xiàn)等擬合曲線(xiàn),再求解擬合多項式系數。
9 、Complex-valued random signals, Polynomial phase signal, Parametricestimation, cyclostationarity, Higher-order statistics, Cumulants, Statistical performance.───復隨機信號,多項式相位信號,參數估計,循環(huán)平穩方法,高階統計量,累積量,統計性能
10 、Some applications of the fast Fourier transform to the polynomial calculation.───多項式計算當中快速傅立葉變換的應用。
11 、A simple approach to compute complex polynomial was introduced.So after the whole data compression, the number of the codeword will be reduced.───應用VB編程處理復雜多項式計算,實(shí)現了數據壓縮編碼算法的優(yōu)化,從而使在整體數據壓縮后,碼字數目得到減少。
12 、In order to calculate the satellite orbit in GPS data process,it is more efficient to use polynomial methods to fit the orbit curve with the parameters of GPS broadcast ephemeris.───利用多項式擬合的方法計算GPS衛星在軌坐標時(shí),使用正交多項式可有效避免計算過(guò)程中出現的病態(tài)矩陣。
13 、To deal with such an NP-hard problem, the paper proposes two dynamic programming algorithms, a branch and bound algorithm with a polynomial solvable case.───對于這一NP-困難的排序問(wèn)題,本文給出了兩個(gè)動(dòng)態(tài)規劃解法及其多項式可解的特例,并給出了一個(gè)分枝定界算法。
14 、Could be aa cipher, a randomly generated number, a polynomial artifact.─── 有可能是暗號 有可能是隨機生成的數字 有可能是多項式的人為現象
15 、This paper presented a new method combining of neighbor search and interior point to solve unit commitment (UC) nondeterministic polynomial (NP)-hard problem.───定義鄰域的結構,并提出一種鄰域的調整方法,可處理各項約束條件,保證結果的可行性。
16 、Under the condition of a large integer factoring problem, S1 is decrypted by constructing a special polynomial function (scheme 1).───在大整數分解困難問(wèn)題的條件下,構造特殊多項式函數來(lái)解密S1(方案1)。
17 、Using third order polynomial fitting in center area of FOV, the theory focal length also can be computed.───在計算鏡頭畸變中,利用中心視場(chǎng)區域內畸變設計無(wú)窮小,采用三次多項式擬和的方法,計算鏡頭理論焦距;
18 、We put the decimal in the wrong spot in our proof of the existence of a bound for the number of limit cycles of planar polynomial vector fields of fixed degree.─── 在證明不動(dòng)度平面多項式向量場(chǎng)的 極限環(huán)是否有界的過(guò)程中 我們故意把小數點(diǎn) 放錯了位置
19 、Theorem 4.1 Algorithm 4 can solve the problem (P) by using at most 2k-1 matchings in polynomial time.───定理4.1 算法4能夠在多項式時(shí)間內給出問(wèn)題(P)的一個(gè)用2k-1次匹配的解。
20 、Analogous to the quadratic B-spline curves,each trigonometric polynomial curve segment is generated by three consecutive control points.───與二次B樣條曲線(xiàn)類(lèi)似,曲線(xiàn)的每一段由相繼的三個(gè)控制頂點(diǎn)生成;
21 、To this day, researchers have found only a few other quantum algorithms that appear to provide a speedup from exponential to polynomial time for a problem.───到目前為止,研究人員只找到少數的量子演算法,可以將一個(gè)問(wèn)題的計算所需時(shí)間,由指數時(shí)間降到多項式時(shí)間。
22 、Theorem 3.3 Algorithm 2 is a polynomial approximation algorithm of using at most 2k-1 matchings.───定理3.3 算法2是最多用2k-1次匹配的多項式近似算法。
23 、A primal-dual infeasible-interior-point algorithm for box linear programming is presented.And it is prcved that the iteration complexity is polynomial.───對框式線(xiàn)性規劃提出了一個(gè)原始-對偶不可行內點(diǎn)算法,并證明了該算法的迭代復雜性為多項式時(shí)間性.
24 、A complete quartic polynomial consists of 15 terms.───一個(gè)完整四次的多項式由15項組成。
25 、The absolute values of the coefficients of any chromatic polynomial form a unimodal sequence.───任何多項式系數的絕對值都構成單峰序列。
26 、It developed a general solution to discrete log in polynomial time.─── 它開(kāi)發(fā)出了多項式時(shí)間內 離散對數的通用解
27 、Even-length Bernstein filter banks (EBFB) is a new class of even-length filter banks based on Bernstein polynomial.───EBFB是基于伯恩斯坦多項式的偶數長(cháng)濾波器組。
28 、A conclusion on rational root of one variable polynomial with integer coefficient is generalized and a method on multivariate polynomial factorization is put forward.───將一元整系數多項式有理根的一個(gè)結論在多元多項式上進(jìn)行了**,從而得到多元多項式因式分解的一種方法。
29 、The relation ship between the generalized Radon transform and Gegenbauer polynomial is studied,are generalized. The results of Deans and Ludwig.───對于廣義Radon 變換,本文得到了它與Gegenbauer多項式的關(guān)系式,**了Deans 和Ludw ig 的工作
30 、Autofluorescence is subtracted from the raw spectrum by polynomial fitting and skin Raman spectrum is then smoothed for further analysis.───利用多項式擬合的方法扣除熒光背景,對其進(jìn)行平滑和濾噪,并對拉曼峰進(jìn)行了歸屬和指認。
31 、The main method is got a the relation ship be t ween the high pressure are the oil parameters by using the polynomial matching m ethod based on the present data in the oilfield.───主要方法是根據各油田有代表性的高壓物性資料,采用多項式的方法對實(shí)測點(diǎn)進(jìn)行擬合,得出原油的高壓物性與地層壓力之間的關(guān)系式;
32 、Based on the deep analysis of the principle of parametric polynomial method, shape eigenfunction method is presented in this paper.───在深入分析參數多項式方法數學(xué)原理的基礎上,提出了參數分布形狀特征式法。
33 、Eisentein Discrimination Method 1 to decide the irreducibility of the multinomial polynomial of integral coefficients is one of the main methods offered in higher algebra.───判定整系數多項式的不可約性,艾森斯坦因判別法[1](以下簡(jiǎn)稱(chēng)“艾法1”)是高等代數中給出的主要方法之一。
34 、This paper proposes a polynomial approximate method using the property of light scattering.───利用光線(xiàn)散射的特性,提出一種多項式近似的方法;
35 、It included Karaji's binomial theorem and rules of the arithmetic polynomial operations and developed Karaji's theory of polynomial.───其中保存了凱拉吉的關(guān)于二項式定理的工作以及多項式的運算法則,并進(jìn)一步發(fā)展了凱拉吉的多項式理論。
36 、Do Section V.5 on the smallness of the Auxiliary polynomial.───5中關(guān)于輔助多項式有界性。
37 、The principle of a CRC technique is the following: the eight bits of the word are treated as coefficient of a polynomial of degree 7.───CRC方法的原理如下:一個(gè)字的8位作為7次多項式的系數。
38 、With the use of the properties of the second Chebyshev polynomial,a group of interesting identity of sine and cosine function is obtained.───利用第二類(lèi)契貝謝夫多項式的性質(zhì)得到了關(guān)于正余弦函數的一組有趣的恒等式。
39 、Another general method explored by Viets was to factor the polynomial into first degree factors.───威茨所探求的另一個(gè)一般性方法是把多項式分解成一次因子。
40 、A homogeneous polynomial having two or more variables.───多元齊次多項式有兩個(gè)或多個(gè)變量的齊次多項式
41 、As the fitted Zernike polynomial of exit pupil wavefront cannot express the discrete wavefront accurately, the former way is much different from the reality system.───對于離散出瞳波前,擬合的澤尼克多項式不可避免有較大誤差,由此計算獲得的調制傳遞函數與實(shí)際測量值有較大區別。
42 、Polynomial geometry is based on the hexagonal geometry (HG) and multicentered double-density (MD) mode.───多邊形分布方法結合了正六邊形和多中心-多密度分布模型的優(yōu)點(diǎn)。
43 、And a memory polynomial model is proposed for the predistorter.───并提出一種記憶多項式模型用于放大器的預失真。
44 、Its form up to a tenth degree polynomial is shown below.───下面寫(xiě)出一直到十次多項式的帕斯卡三角形。
45 、Under the condition of discrete logarithm problem, S2 was decrypted by OPE (Oblivious Polynomial Evaluation) protocol and Lagrange Interpolation Polynomial (scheme 2).───在離散對數困難問(wèn)題的條件下,利用不經(jīng)意多項式估值協(xié)議(OPE)和拉格朗日**值多項式來(lái)解密S2(方案2)。
46 、Most of the kernel functions are polynomial for curve & surface modelling in CAGD.───在計算機輔助幾何設計中 ,曲線(xiàn)曲面擬合一般采用多項式作為基函數。
47 、Meantime,the polynomial time algorithm is suggested.The method provides a new way for the bilevel decision problem and multi-level decision making.───同時(shí),在上下層問(wèn)題獨立求解時(shí),引入了一種多項式的時(shí)間算法,為兩層以及多層決策問(wèn)題提供了新的求解途徑。
48 、A polynomial with two terms.───二項式
49 、This paper proposes a rigorous algorithm for solving the 0-1 polynomial knapsack problem.───提出了0-1多項式背包問(wèn)題的一種新的精確算法。
50 、To reduce these disadvantageous influences, sensor output signal polluted by additive noise are processed by hybrid filter with polynomial FIR predictors and median (PMH).───為了解決該問(wèn)題,本文討論了多項式預測濾波和中值濾波相結合的方法對傳感器輸出信號進(jìn)行濾波消噪。
51 、But the language constructed there is indeed an unnatural one because the construction needs to run all polynomial time Turing machines.───但 Lander給出語(yǔ)言并不是一個(gè)自然的語(yǔ)言因在該語(yǔ)言的構造中需運行所有多項式時(shí)間的圖靈機 .
52 、The concept is introduced of the annihilating polynomial and minimal polynomial of vector with linear transform, their property discussed.───介紹了線(xiàn)性變換作用向量的化零多項式與最小多項式的概念,并討論了它們的性質(zhì)。
53 、It's possible to make contrived functions f(x), for which no such polynomial exists, but these rarely occur in practice.─── 也可以人為創(chuàng )造一個(gè)函數f(x) 一個(gè)不存在逼近多項式的函數 但在實(shí)踐中這樣的函數很少見(jiàn)
54 、Stochastic parameter sensitivity of SRM grain structure was analyzed based on viscoelastic stochastic finite element method(VSFEM) and polynomial regression model.───基于粘彈性隨機有限元法(VSFEM)和多項式回歸模型,分析了固體火箭發(fā)動(dòng)機藥柱結構的隨機參數靈敏度。
55 、The bit-operation complexity of the fast exponential algorithm is polynomial.───快速指數算法的比特運算復雜度是多項式的。
56 、On Polynomial Representations of Lie Algebras, Zhuo Chen, Long-Guang He and De-shou Zhong , N.E. Math J. to appear.───半單李代數的單純作用,陳酌與祁玉海,數學(xué)年刊,刊印中.
57 、The deflection field of the element is expressed with a polynomial of area coordinates which is corresponding to a polynomial of 4th order in Cartesian coordinates ?(x,y)?.───單元的撓度場(chǎng)以面積坐標多項式表示,對應于直角坐標x,y的完全三次式和部分四次式,因而單元是完備的廣義協(xié)調的板單元。
58 、The wafer warpage curve is 2nd order polynomial, therefore the warpage results of a 2” wafer can be calculated from smaller models to reduce calculation time.───利用晶圓翹曲為二次多項式曲線(xiàn)之關(guān)系,兩吋晶圓之翹曲可由較小半徑模型之翹曲求得,以節省計算時(shí)間。
59 、For this purpose,ap ampitude equalizer was designed by use of Bessel polynomial in this paper,so as to implement relative gain compensation without delay distortion.───為上述目的,本文中利用貝塞爾多項式設計了振幅均衡器,以實(shí)現無(wú)延遲失真的相對增益補償.
60 、The polynomial method can evaluate the linear degree of the laboratorial methods using statistical theory and considering clinical significance.───多項式線(xiàn)性評價(jià)方法充分利用統計理論,結合臨床可科學(xué)評價(jià)實(shí)驗方法線(xiàn)性程度。
61 、Interpolating.zip,46KB,下載 118 次,Finds the polynomial p10 of degree less than or equal to 10 that interpolates cos x on the interval [0, PI/2] at 11 equally spaced points.───下載332次,用于多個(gè)離散點(diǎn)擬合光滑曲線(xiàn)的,優(yōu)化了追趕法,這個(gè)例子適用于閉合和不閉合兩種情況。
62 、Today's example function is evaluating a third order polynomial.───今天的例子是評測一個(gè)三次多項式。
63 、The second order regressive polynomial was determined by the curve and the value of CTOD was estimated furthermore.───可以使一組沒(méi)有規律的數據,成為一條光滑的曲線(xiàn)。
64 、Under the condition of a discrete logarithm problem, S2 is decrypted by the OPE (Oblivious Polynomial Evaluation) protocol and Lagrange Interpolation Polynomial (scheme 2).───在離散對數困難問(wèn)題的條件下,利用不經(jīng)意多項式估值協(xié)議和拉格朗日**值多項式來(lái)解密S2(方案2)。
65 、When the determinant is expanded, it produces a polynomial, called the characteristic polynomial.───當行列式展開(kāi)后,得到一個(gè)多項式,叫它為特征多項式。
66 、Based on that, with time-sequence theory, it concluded the polynomial model is the basic model for predicting SISE.───在此基礎上,研究、選擇了時(shí)間序列理論預測軌道誤差,得出了多項式模型是預測SISE的基本模型的結論。
67 、Polynomial Control Systems offers new tools for the modeling, analysis, and design of linear control systems.───Polynomial Control Systems為建模、分析、和設計線(xiàn)性控制系統提供了新的工具。
68 、Under the condition of a discrete logarithm problem,S2 is decrypted by the OPE(Oblivious Polynomial Evaluation) protocol and Lagrange Interpolation Polynomial(scheme 2).───在離散對數困難問(wèn)題的條件下,利用不經(jīng)意多項式估值協(xié)議和拉格朗日**值多項式來(lái)解密S2(方案2).
69 、Based on the curve of quintic polynomial,the take-up cam is designed,and the method of optimized design is presented in this paper.───利用五次多項式曲線(xiàn)對挑線(xiàn)凸輪進(jìn)行了設計;并根據刺繡機的特殊要求,提出了刺繡機最優(yōu)化設計方法。
70 、Accordingly, this paper offered optimized algorithm for reduction of knowledge, of which time complexity was polynomial.───在此基礎上提出了優(yōu)化的知識約簡(jiǎn)算法,該算法的時(shí)間復雜度是多項式的。
71 、The interior point method is a polynomial time algorithm for solving linear programming problem, and its number of iterations is independent on the size of system.───內點(diǎn)法是一種求解線(xiàn)性規劃問(wèn)題的多項式時(shí)間算法,其顯著(zhù)特征是其迭代次數與系統規模關(guān)系不大。
72 、The purpose is to establish the relation between the Aitken transformation and a class of polynomial sequences defined by Horadam,and to generalize the results of some papers.───建立了Horadam定義的一類(lèi)多項式與Aitken變換的聯(lián)系,**了一些文獻中的結果。
73 、An infeasible path-following algorithm is constructed, and its polynomial complexity is analyzed.───基于這組方程,文中建立了一個(gè)求解線(xiàn)性互補的不可行內點(diǎn)算法,并分析了它的多項式復雜度。
74 、Let h(G,x) denote the adjoint polynomial of a Graph G. The chromatic uniqueness and chomatic equivalence from the complement of Graph G are studied.───h(G,x)表示圖G的伴隨多項式,它從圖G的補圖出發(fā)研究色惟一和色等價(jià).
75 、By means of both the cubic spline functions in the toolbox of MATLAB and the ordinary polynomial interpolation func...───同時(shí)也得出了極坐標下的三次樣條遠優(yōu)于直角坐標下的多項式.
76 、In the Format Trendline dialog box, on the Type tab, the pointer selects Polynomial and then clicks OK.───在“趨勢線(xiàn)格式”對話(huà)框中的“類(lèi)型”選項卡上,指針選擇了“多項式”,然后單擊“確定”。
77 、AKS algorithm was proposed by three computer scientists in India in Aug 2002.This algorithm can unconditionally determine whether an input number is a prime in polynomial time.───AKS算法是3位印度的計算機科學(xué)家于2002年8月提出的,它是一個(gè)能在輸入規模的多項式時(shí)間內確定的對一個(gè)數進(jìn)行素性測試的方法.
78 、HMO characteristic polynomial and select eigenvalues for many heterocyclic benzenoids are calculated by using chemical graph theory methods.───應用化學(xué)圖論計算了雜環(huán)芳烴HMO的選擇本征值和本征多項式。
79 、In order to retrench the data quantity, eight step Chebyshelv polynomial function parameters and ls rate precise clock corrections are broadcasted.───為了節省傳送的數據量,數據分析中心向用戶(hù)站發(fā)播八階切比雪夫多項式擬合系數和一秒更新率的衛星鐘差。
80 、It is unsuitable to directly adopt indirect polynomial correction method in the process from raw data to longitude latitude projection image.───并在大量實(shí)驗的基礎上指出,從原始數據圖像到等經(jīng)緯度投影圖的糾正過(guò)程中不宜采用間接的多項式擬合法。
81 、Also the curve plotted accordion to the polynomial shows in good agreement with the velocity distribution profile given by the exact solution.───同時(shí),該多項式對應的曲線(xiàn)與精確解的速度分布曲線(xiàn)擬合很好。
82 、It's commonly believed that no polynomial time algorithms exist for such formula satisfiability problems,since they belong to the NPC class.───布爾表達式的判定是NPC問(wèn)題,用回溯法就能解決這一問(wèn)題(只要變量不是很多)。
83 、The solvability conditions of the LQ inverse problem for the multivariable linear time invariant system is studied iwth the polynomial matrix method.───利用多項矩陣方法研究了多變量線(xiàn)性定常系統LQ逆問(wèn)題的可解性條件,得到了一般情形下的LQ逆問(wèn)題解的充要條件及其代數描述。
84 、Let L_n(x) bc thc interpolation polynomial of dcgrce n for a function f(x).───令L_n(x)是函數f(x)的n次**值多項式。
幾種GIS空間**值方法
1.IDW?;舅枷胧悄繕穗x觀(guān)察點(diǎn)越近則權重越大,受該觀(guān)察點(diǎn)的影響越大。好處是觀(guān)察點(diǎn)本身是絕對準確的,而且可以限制**值點(diǎn)的個(gè)數。通過(guò)power可以確定最近原則對于結果影響的程度。Searchradius可以控制**值點(diǎn)的個(gè)數。2.克里金**值??死锝?*值與IDW**值的區別在于權重的選擇,IDW僅僅將距離的倒數作為權重,而克里金考慮到了空間相關(guān)性的問(wèn)題。它首先將每?jì)蓚€(gè)點(diǎn)進(jìn)行配對,這樣就能產(chǎn)生一個(gè)自變量為兩點(diǎn)之間距離的函數。對于這種方法,原始的輸入點(diǎn)可能會(huì )發(fā)生變化。在數據點(diǎn)多時(shí),結果更加可靠。時(shí), 其內**的結果可信度較高。通過(guò)某種函數來(lái)模擬他們之間的關(guān)系,這樣就能夠得到空間分布的關(guān)系了。接著(zhù)再用這種空間分布的關(guān)系來(lái)模擬出所得的數據。Ordinary是指一般的情況,而universal是指已知某種分布模式比如風(fēng)暴的模擬等等3.Natural Neighbour法原理是構建voronoi多邊形,也就是泰森多邊形。首先將所有的空間點(diǎn)構建成voronoi多邊形,然后將待求點(diǎn)也構建一個(gè)voronoi多邊形,這樣就與圓多邊形有很多相交的地方,根據每一塊的面積按比例設置權重,這樣就能夠求得待求點(diǎn)的值了。個(gè)人感覺(jué)這種空間**值方法沒(méi)有實(shí)際的意義來(lái)支持。4.樣條函數**值spline這種方法使用樣條函數來(lái)對空間點(diǎn)進(jìn)行**值,它有兩個(gè)基本條件:1.表面必須完全通過(guò)樣本點(diǎn)2.表面的二階曲率是最小的。一下是一篇論文里spline與IDW之間的比較:從本文實(shí)驗數據可以看出,IDW **值主要受冪指數和各采樣點(diǎn)屬性值變化情況的影響,冪指數越高,其局部影響的程度越高,在IDW搜索半徑內,若各個(gè)采樣點(diǎn)屬性值變化較小時(shí),內**結果受冪指數的影響較??;Spline **值主要受**值類(lèi)型(Regularized 或Tension)和weight 值的影響,一般Regularize **值結果比Tension**值結果光滑,在Regularized Spline **值中,weight 值越高生成的表面越光滑,Tension Spline **值則相反;總體來(lái)看,IDW和SPLINE **值受采樣點(diǎn)范圍、采樣點(diǎn)密度、采樣點(diǎn)屬性取值變化以及各自的參數影響,當采樣點(diǎn)足夠密時(shí),使用IDW**值可以取得良好效果,SPLINE**值則適合那些空間連續變化且光滑的表面的生成。5.Topo to Raster這種方法是用于各種矢量數據的,特別是可以處理等高線(xiàn)數據6.Trend這種方法是用多項式擬合,雖然它不一定在局部很符合輸入點(diǎn),但是在總體上是非常符合的。由Polynominalorder來(lái)確定多項式的級數,1表示平面,最高是12,這是最復雜的情況。
幾種GIS空間**值方法
GIS空間**值方法如下:
1、IDW
IDW是一種常用而簡(jiǎn)便的空間**值方法,它以**值點(diǎn)與樣本點(diǎn)間的距離為權重進(jìn)行加權平均,離**值點(diǎn)越近的樣本點(diǎn)賦予的權重越大。 設平面上分布一系列離散點(diǎn),已知其坐標和值為Xi,Yi, Zi (i =1,2,…,n)通過(guò)距離加權值求z點(diǎn)值。
IDW通過(guò)對鄰近區域的每個(gè)采樣點(diǎn)值平均運算獲得內**單元。這一方法要求離散點(diǎn)均勻分布,并且密度程度足以滿(mǎn)足在分析中反映局部表面變化。
2、克里金**值
克里金法(Kriging)是依據協(xié)方差函數對隨機過(guò)程/隨機場(chǎng)進(jìn)行空間建模和預測(**值)的回歸算法。
在特定的隨機過(guò)程,例如固有平穩過(guò)程中,克里金法能夠給出最優(yōu)線(xiàn)性無(wú)偏估計(Best Linear Unbiased Prediction, BLUP),因此在地統計學(xué)中也被稱(chēng)為空間最優(yōu)無(wú)偏估計器(spatial BLUP)。
對克里金法的研究可以追溯至二十世紀60年代,其算法原型被稱(chēng)為普通克里金(Ordinary Kriging, OK),常見(jiàn)的改進(jìn)算法包括泛克里金(Universal Kriging, UK)、協(xié)同克里金(Co-Kriging, CK)和析取克里金(Disjunctive Kriging, DK);克里金法能夠與其它模型組成混合算法。
3、Natural Neighbour法
原理是構建voronoi多邊形,也就是泰森多邊形。首先將所有的空間點(diǎn)構建成voronoi多邊形,然后將待求點(diǎn)也構建一個(gè)voronoi多邊形,這樣就與圓多邊形有很多相交的地方,根據每一塊的面積按比例設置權重,這樣就能夠求得待求點(diǎn)的值了。個(gè)人感覺(jué)這種空間**值方法沒(méi)有實(shí)際的意義來(lái)支持。
4、樣條函數**值spline
在數學(xué)學(xué)科數值分析中,樣條是一種特殊的函數,由多項式分段定義。樣條的英語(yǔ)單詞spline來(lái)源于可變形的樣條工具,那是一種在造船和工程制圖時(shí)用來(lái)畫(huà)出光滑形狀的工具。在中國大陸,早期曾經(jīng)被稱(chēng)做“齒函數”。后來(lái)因為工程學(xué)術(shù)語(yǔ)中“放樣”一詞而得名。
在**值問(wèn)題中,樣條**值通常比多項式**值好用。用低階的樣條**值能產(chǎn)生和高階的多項式**值類(lèi)似的效果,并且可以避免被稱(chēng)為龍格現象的數值不穩定的出現。并且低階的樣條**值還具有“保凸”的重要性質(zhì)。
5、Topo to Raster
這種方法是用于各種矢量數據的,特別是可以處理等高線(xiàn)數據。
6、Trend
根據已知x序列的值和y序列的值,構造線(xiàn)性回歸直線(xiàn)方程,然后根據構造好的直線(xiàn)方程,計算x值序列對應的y值序列。TREND函數和FORECAST函數計算的結果一樣,但是計算過(guò)程完全不同。
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