least squares method 中文意思是什麼
least squares method
解釋
最小2-
The dispersion model, with axial dispersion only was used to describe the liquid flow in the downcomer. the model parameters were fitted by the least - squares method. it was found that the curve of dispersion model fitted the experimental rtd curve well
本文利用一維軸向擴散模型對降液管中液體流動進行了數學描述，用時間域最小二乘法擬合了模型參數，模型方程所作曲線與rtd曲線吻合較好。 -
Using the least squares method to modulate the inclined cable forces both in forward analysis stage and backward analysis stage, the tensile inclined cable forces during construction will be get finally
最後採用最小二乘法對正裝和倒拆兩個步驟中得到的索力進行修正，得到施工中的斜拉索的張拉索力。 -
Second, carried out the fatigue life test of the truck ' s front axles adopted grouping fatigue life test method, calculated the results on theory of probability stats, linear fitted the fatigue life data by means of the basquin equation and least squares method, acquired the mathematical model of s - n and p - s - n curve of the front axles
其次，採用成組試驗法，對汽車前橋進行了疲勞壽命試驗，藉助概率統計方法對試驗結果進行了分析計算，得到了各試驗載荷下的疲勞壽命的正態分佈的均值和標準差，採用basquin關系式和最小二乘法對疲勞壽命數據進行線性擬合，得到了前橋的s - n和p - s - n的關系。 -
Using three - dimensional tomographic imaging results of 2 ? 2 ? grid s wave velocity and 15 ' 15 ' grid average gravity anomaly in north china, this paper adopted inversion with constrained least squares method and, as a result, obtained density distribution results of six bedding surfaces in lithosphere of north china
摘要利用華北地區的2 ? 2 ?網格s波速度三維層析成像結果和15 ? 15 ?的網格平均布格重力異常，採用約束最小二乘方法反演，得到了華北地區巖石圈內6個層面上的密度分佈結果。 -
Finally, the method of estimating power customer emission level based on binary linear regression is put forward, which make it a condition that harmonic emission is steady at the point of common coupling. combined with power system thevenin equivalent and customer norton equivalent, according to the principle of least squares method, the voltage that a customer ' s harmonic current begets at the point of common coupling can be estimated in the light of the plural correlation of network parameters
最後，提出了基於二元線性回歸的用戶諧波發射水平估計方法，該方法在假設公共聯接點諧波發射穩定的情況下，結合系統側戴維南等值與用戶側諾頓等值的電路圖，按照最小二乘法原理，利用電網各參數的復數關系推導關于系統側諧波阻抗的二元線性回歸方程，並根據諧波阻抗的估計值求取用戶諧波電流在公共聯四川大學碩士學位論文（ 2003 ）接點產生的電壓降。 -
Using iterative reweighted least squares method for evaluating flatness errors
使用迭代重加權最小二乘法求解平面度誤差 -
Works on the bending roll system of four - roll rolling mill, the workroll shape variation caused by the force of bending roll and the contact stress between rolls was researched with the fem software ansys, the maximum deformation of the work roll was calculated, and the curve of the gap adopting the least - squares method was fitted, which set the base of the further calculation of load - gap shape
摘要以四輥軋機的彎輥系統為研究對象，利用有限元分析軟體ansys研究彎輥力和輥間接觸應力引起工作輥形狀的變化，計算工作輥彎曲的最大變形量，並用最小二乘法對輥縫曲線進行擬合，為進一步計算有載輥縫形狀提供可靠的理論依據。 -
This way has been improved in this paper. whole - cycle fourier differential algorithm is adopted in record start - up to satisfy the real - time requirement. the least squares method is applied to extract the fundamental frequency component in location which has low computing speed but high precision
故障錄波啟動採用全波傅立葉差分演算法，以滿足啟動實時性要求，測距所需基波的提取採用最小二乘法，適應其精度要求高而實時性無要求的特點。 -
According to test results of three or more than three points of flowing pressure and corresponding liquid output, the regression equations that contained the 3 undetermined coefficients were setup by the least squares method rule, and the undetermined coefficients were solved by the optimization method
根據3點或更多點穩定工作制度下產量與對應流壓的測試數據，建立了確定3個待定系數的非線性代數方程組。 -
Method of ascertaining main effecting factors in dam mathematics safety monitoring model during construction period is studied. and dam safety monitoring model during construction period is founded, including statistic model, deterministic model and hybrid model. moreover, traditional regression model is improved, based on deeply studying robustified least squares method
（ 2 ）研究了大壩施工期數學安全監控模型中各主要影響因素的確定方法及因子的選擇原理，並建立了大壩施工期安全監控模型（統計數學模型、確定性數學模型和混合數學模型） ；此外，在深入研究抗差最小二乘法的基礎上，對傳統的回歸模型進行了改進。 -
The paper establishes the model for the urban life - water quantity prediction by means of combining neural network with the partial least squares method
將偏最小二乘回歸與神經網路耦合，建立了城市生活用水量預測模型。 -
The first chapter quotes three methods for determining the steady - state equivalent circuit parameters of an induction machine. they are the classical locked - rotor and no - load tests, the direct modification method and the recursive least - squares method. then a new parameter estimation method based on genetic algorithms is presented
緒論首先引述了確定感應電動機穩態模型參數的其他三種方法：傳統的空載和堵轉試驗方法、直接修正參數法和遞推最小二乘法，並由此提出基於遺傳演算法的參數識別技術。 -
Based on the moving least squares method and the finite difference scheme, a new element - free method is proposed and used to simulate horizontal two dimension river flow with complicated boundary
本文通過引入滑動最小二乘法和有限差分法，得到水動力學無單元計演算法並應用於復雜邊界的河道水流運動方程。 -
Comparison of the estimator from the least - squares method with the robust method shows that the estimator from the robust estimator is more reliable
通過比較，對于各測線上所有采樣點的系統誤差補償來說，系統誤差模型的抗差估計比最小二乘估計的可靠性更高。 -
3. this paper also presents the gray - artificial neural network combined model, which combines the gray metabolic model with the modified artificial neural network, and the weight coefficient of combined forecasting method is decided by least squares method
以改進的bp神經網路和灰色新陳代謝模型作為單項模型進行組合預測，並將灰色模型融入神經網路模型的預測過程，最後採用最小二乘法確定組合模型中各個單項模型的權系數。 -
A new kind of optimal selection cluster algorithm ( osca ) is presented in this paper, and a new hybrid algorithm is obtained by combining osca with least squares method and gradient algorithm. the algorithm can synchronously solve the identification problems of the new fuzzy neural network model ' s structure and parameters
提出一種新型優選聚類演算法，並將該演算法與最小二乘法和梯度下降法相結合，形成一種新的混合學習演算法。該演算法能同時解決上述新型模糊神經網路模型結構和參數的辨識問題，進一步提高了模型的辨識精度。 -
Aim to the special model nc bend tube, use the modeling method that essential parameter drive product sample model ; 3 ) in the foundation that summing up a rule of optimized welding assembly underside of tube, develop the nc bend tube welding underside optimization design tool, then complete the optimization design united with two application methods : rotation method and the least squares method ; 4 ) propose a design method of nc bend tube welding jig bottom base, then establish model storehouse according to the design rules, and endow the foundation model with assembly feature
針對多數通用型數控導管，運用矢量轉換演算法反求得導管關鍵特徵，並據此創建導管模型，針對特殊造型數控導管，使用關鍵參數驅動產品庫樣本模型的方法完成建模; 3 ）在歸納總結了焊接底面創建規則的基礎上，開發數控導管焊接底面優化設計工具，分別應用旋轉法和最小二乘法兩類方法完成底面的優化設計; 4 ）提出了一種數控導管焊接底座設計方法。 -
Compared with classical recursive extended least squares, their accuracy obviously is improved. applying these new algorithms to the parameter estimation problem for systems with measurement noises, some new approaches and algorithms of parameter estimation for system with measurement noises, are presented, for example, two - stage rels - gevers - wouters algorithm and three - stage rls - pi - gevers - wouters algorithm, which solve the biased parameter estimation problem by classical least squares method
並將這些演算法推廣到帶觀測噪聲系統參數估計的問題，給出了帶觀測噪聲系統參數估計的一些新方法和新演算法，其中包括兩段rels - gevers - wouters演算法和三段rls - pi - gevers - wouters演算法，解決了用普通最小二乘法估計帶觀測噪聲系統未知參數的有偏問題。 -
Based on the classical least squares method ( rls ) in system identification, the several new identification algorithms of parameter estimation for the autoregressive moving average ( arma ) model, are presented. they include univariable and multivariable two - stage recursive least squares - recursive extended least squares ( rls - rels ) and two - stage recursive least squares - pseudo - inverse ( rls - pi ) algorithms
本文在系統辨識經典的最小二乘法（ rls ）的基礎上，提出了自回歸滑動平均（ arma ）模型參數估計的一些新的辨識演算法，它包括單變量和多變量兩段遞推最小二乘?遞推增廣最小二乘（ rls ? rels ）演算法和兩段遞推最小二乘?偽逆（ rls ? pi ）演算法等。 -
Abstract : a blind multiuser detection algorithm based on nonlinear least squares method is proposed. it is proved that as the number of the sampled data vectors is large, the performance of this algorithm tends to the performance of moe. simulations indicate that the performance of this algorithm is better than that of cmoe, and can be used in variable enviorment
文摘:基於非線性最小二乘方法，提出了一種新的多用戶檢測演算法，並且證明了在大樣本取值的情況下，這一演算法的性能逼近於moe演算法的性能.模擬分析表明，演算法性能優于cmoe演算法，且能適應環境的變化
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