two-parameter model 中文意思是什麼
two-parameter model
解釋
雙參數模型-
But my focus was specially laid on the decision - making of investment under uncertainty and with competition, i first. extend the basic model of dixit & pindyck ' s by allowing the relevant parameter to be a random variable, then proposed an numerical example to show how to solve this model, i gave the algorithm and did the comparative static analysis, finally i developed a model of duopoly under uncertainty, considering the competition between the firms explicitly, using roa, i calculated the two firm ' s values respectively when they take different roles - to be leader or follower, and then checked the possible equilibriums
本文的重點是考察在同時存在不確定性和競爭的情況下，如何用實物期權的理論估算投資項目的價值，為此，文中發展了兩個模型，第一個模型是對dixit & pindyck的模型的擴展，它通過一個相關的隨機變量來考察競爭對項目價值的影響，但沒有考慮企業間的相互博弈，文中給出了一個例子詳細地說明了該模型的求解並做了敏感性分析；第二個模型是一個不確定情況下的雙寡頭模型，文中給出了用實物期權方法計算的兩企業在處于領導者和跟隨者兩種不同境況時的價值，並將企業間的相互博弈考慮在內，考察了可能的均衡狀態。 -
The least square estimation in linear model is used to derive the two - stage estimation of the item parameter vector 1 of j th item as follows : noting that xj consists of the nuisance parameters s, j, j, were updated so that the estimation of 6 s could be renewed
修正進而修正x _ j和，從而形成一種新的估計方法?雙重兩步迭代估計蒙特卡洛模擬結果顯示，雙重兩步迭代估計提高了估計對真值的恢復能力。 -
According to the geometry of slope measurements for the subjective wavefront optometer, a wavefont reconstruction model using zernike polynomial with normalization factor is put forward. based on householder transformation and gram - schmidt orthogonalization method, two methods for working out unknown zernike coefficients are bring forward. the error propagation parameter for the wavefront reconstruction model is deduced
深入研究了帶標準化因子的zernike多項式的性質;針對主觀式像差儀波前斜率采樣方案，提出了採用帶標準化因子的zernike多項式對眼測試波前進行重建的數學模型;提出了兩種求解方法，即基於householder變換求解法和基於gram - schmidt正交化求解法，用於確定重建模型中的未知模式系數;推導出了該波前重建模型對斜率測量誤差的傳遞系數。 -
The important meaning in which this direction studied has lain in establishing the connection between the material science of concrete and civil engineering, analyse the strength in terms of material microcosmic or the mesoscopic, have important meaning to understanding, know the essential law of the strength of concrete. this text divides six chapters altogether. chapter one reviewed the pore structure in nowadays domestic and international research current situation, including the concrete examines research, research of the pore structure model and the research current situations of pore structure and strength relation of the pore method, have introduced some most important achievements of structure research of pore ; chapter two narrated much yardstick of the material mesoscopic structure of concrete and principle of examining pore technology of material of concrete, and the commonly used sign parameter in discussedding the pore and material pore of quito of cement and analyse, have explained that the influence factor of mip to the result of study of pore, has pointed out the limitation in mip in the pore structure ; analyse porosity and strength relation development course of model emphatically, and has carried on comparative analysis to the existing model, has pointed out the weak point of the original model ; on the basis of " ing integrate synthetically ", propose concrete pore structure compound body model and pore physical model of systemlex body ; chapter five carried on the corresponding test data to compares to the model parameter appearing in model of chapter four with and analyses, have received k value of the characteristic of strength of matrices of reflecting according to the method to return to analysis, and calculate the influence produced on the strength of concrete in revision that can probed into the content of cement, elastic mould and surface energy, exactness of the inspection model ; chapter six is the conclusion, according to studying the survey this text to some research conclusions of the pore structure and making corresponding prospect to the structure development of pore
第一章回顧了孔結構在當今國內外的研究現狀，包括混凝土測孔方法的研究、孔結構模型的研究及孔結構與強度關系的研究現狀，介紹了孔結構研究方面的一些最重要的成果；第二章敘述了混凝土材料細觀結構的多尺度性及混凝土材料測孔技術的原理，並討論了水泥基多孔材料孔隙分析中常用的表徵參數，也說明了壓汞法測孔對研究結果的影響因素，指出了壓汞法在孔結構研究中的局限性；第三章是著重分析了孔隙率與強度關系模型的發展歷程，並對已有的模型進行了比較分析，指出了原有模型的不足之處；第四章在「綜合集成」的基礎上，提出了混凝土孔結構復合體模型和孔系統的物理模型，並模擬了該模型下由各單體並聯形成的復合體的斷裂過程，最後根據所建模型編制了相應的計算程序，可根據輸入的孔徑分佈與水泥含量等參數，實現混凝土理論強度的計算；第五章對第四章模型中出現的模型參數進行了相應的試驗數據對比分析，根據回歸分析的方法得到了反映基體強度特徵的k值，並從理論上探討了水泥含量、彈性模量和表面能的修正對混凝土強度計算產生的影響，檢驗模型的正確性；第六章是結論與展望，根據研究綜述了本文對孔結構的一些研究結論並對孔結構發展作了相應的展望。 -
This text divides into five chapters altogether : chapter one in the introduction, have introduced the common sensor of displacement, has pointed out the fine characteristic of hall ' s sensor, put forward the basic task ; chapter two have introduced the basic operation principle of hall ' s component ; chapter three introduce hall temperature performance, electromagnetic characteristic, zero error, frequency characteristic and these parameter commonly used compensation method and hall simple application of component ; chapter four having recommended the measurement principle of the feedback servo mechanism, systematic implementation method, the experimental result has appeared, structure the mathematics model, and has analysed the error ; chapter five have pointed out the developing direction in the future while looking forward to
本文共分為五章：第一章緒論中，介紹了常見的位移傳感器，指出了霍爾傳感器的優良特性，提出了基本任務；第二章介紹了霍爾元件的基本工作原理；第三章介紹了霍爾元件的溫度性能、電磁特性、零位誤差、頻率特性以及這些參數常用的補償方法和霍爾元件的簡單應用；第四章介紹了反饋隨動機構的測量原理，系統的實現方法，給出了實驗結果，構建了數學模型，並對誤差進行了分析；第五章展望中指出了今後的發展方向。 -
The elastic foundation model is considered as two - parameter elastic foundation model and its effect to moderate - thick plates are taken into account by a set of governing differential equations. united with hu hai - chang ’ s function, least squares collocation weighted residual method which uses b - spline function as trial function is put forward for solving the bending problems. compare with the results of finite element method of lines, spline finite strip method, accurate solution of series etc. it is proved that the method in this article has adequate accuracy and practical feasibility
本文採用瑞斯納中厚板理論求解彈性地基板，建立雙參數地基與中厚板相互作用的控制微分方程，結合胡海昌的解耦函數，運用雙五次b樣條函數作為試函數的離散型最小二乘加權殘值法分析了雙參數地基上的中厚板的彎曲問題，並將結果與有限元線法、有限條法、級數精確解等進行比較，證明本文方法具有足夠的精確性與實際的可行性。 -
Used the identification of bandwidth point, a first - order - plus - dead - time model can be available. meanwhile a 4 - parameter model can be obtained with the two points. with the model available, the two - degree - of - freedom pid controller is designed based on the iae specification and a robustness specification
並利用臨界點的辨識與帶寬點的辨識建立二階純延遲模型，從nyquist圖可以看出，模型在對參數整定關鍵的一段頻率范圍內都能較好的擬和原對象。 -
For a general linear model ( input matrix is deterministic ), under a certain conditions on variance matrix invertibility, the two estimates can be identical provided that they have the same priori information on the parameter under estimation. even if the above information is unknown only for the optimally weighted ls estimate, the sufficient condition and necessary condition, under which the two estimates are identical, is derived. more significantly, we know how to design input of the linear system to make the performance of the optimally weighted ls estimation identical to that of the linear minimum variance estimation in case of being lack of prior information
在一般線性模型（即輸入矩陣為確定性）下，當兩種估計都利用有關被估參數的先驗信息時，二者在方差陣可逆的一定條件下可達到一致；當最優加權最小二乘估計不利用此先驗信息時，存在二者一致的充分條件和必要條件，進而找到一種設計輸入矩陣的方法，使得在先驗信息缺乏的條件下，仍可利用最優加權最小二乘估計達到與線性最小方差估計一樣優越的估計性能。 -
In this thesis, based on item response theory, a number of ways to estimate the latent trait and item parameters were introduced and their advantages and disadvantages were analyzed ; what is more, empirical logistic regression and two parameters logistic model ( 2plm ) are combined to set up a linear model by logit - mapping and a new parameter - estimation method is proposed
新方法將經驗logistic回歸用於兩參數logistic模型的參數估計，使用logit變換建立線性模型，利用線性模型的最小二乘估計得到第j個項目的項目參數向量_ j = （ _ j ， _ j ）的兩步估計由於x _ j含有未知的討厭參數，的理論值也和有關，我們結合上式的結果對進行再估計。 -
The study has completed the design of two - phase inverter and made up of the two - phase inverter - motor system for experimental use it is a variable frequency adjustable speed system with a open - loop control of rotational speed, which consists of voltage - controlled oscillator circulating assign device inverter circuit and two - phase induction motor a accurate mathematical model is set based on the whole system, and simulator program of dynamic and steady condition is established, which is used to calculate the dynamic and steady performance by kron and symmetrical coordinate converter by simulator calculation and experimental research with specific parameter of the system, a comparison is made between predicted and experimental characteristics, experimental measurements are shown to compare closely with corresponding theoretical result it is compared with some variable frequency adjus table speed system comprising inverter and single - phase induction motor from the system efficiency torque pulsation and the effect of two - phase inverter capacitance based on the conclusion, harmonic cancellation pulse width modulation control of a two - phase inverter - fed induction - motor drive system is researched, which cancelled the low harmonic and improve the system performance
通過對電機的kron變換和對稱分量變換，建立了系統較精確的數學模型，編制了系統動態及穩態運行的模擬計算程序分別計算系統的動態和穩態性能。通過對系統的具體參數進行了模擬運算和實驗研究，實驗和模擬結果進行比較，說明實驗和理論較為一致，並從系統效率、轉矩脈動及兩相逆變器電容的影響等方面與各種逆變器和單相異步電動機組成的變頻調速系統加以比較。在此基礎上，對兩相逆變器供電-異步電動機系統使用諧波抑制pwm控制進行了研究，由於減少了低次諧波，改善了系統性能。 -
Fitting results of three non darcy seepage models including three - parameter model, power exponent model and two - section model were pretty good, and broken line model could be simplified to the forms of linear permeability model and darcy model
試驗與分析結果表明，三參數模型、冪指數模型和非線性分段模型這3種非達西滲流模型的擬合效果較好；折線滲流模型簡單實用，在特殊情況下可以簡化為線性滲流模型或達西定律。 -
The theoretical analysis and the simulation of the chain structure model indicate that the fluctuations of mass leaving enthalpy close in on that of distributed parameter model with two - order, two - order, and three order precision at the disturbances of heat flow rate, mass entering flow rate, and mass entering enthalpy
理論分析及模擬結果表明，該模型在熱流量、入口流量和入口焓的擾動條件下，出口焓的變化分別以二階、二階、三階精度逼近分佈參數模型。 -
From the simulation, we can get some parameter curves of landing gear. by analyzing these curves and the methods with two - masses model, the linear state equation of landing gear during landing process was established
基於參數曲線分析和二質量模型建立了起落架著陸的線性狀態方程，應用現代控制理論對方程進行分析並結合matlab軟體對其進行著陸動態模擬。 -
Aiming at the effects of distributed capacitance on accurate fault location, a new method based on the distributed parameter model, where the two - terminal data of the transmission lines are utilized, is proposed
摘要基於線路的分佈參數模型，並且利用線路兩端工頻電氣量和相模變換，提出了在模域中進行故障測距的演算法。 -
After acquainting myself with the research status with regard to beam on two parameter foundation about the computational method, mechanic performance, damage assessment, similitude theory, several aspects will be studied in this paper : ( 1 ) whereas most of the existed researches are based upon winkler ( one - parameter ) foundation model, this paper discusses the computational methods of beam on two - parameter foundation, and compare the different methods with each other
在較為充分地了解了國內外對雙參數地基上樑的計算方法、力學性能、破損評估、相似性理論應用的研究現狀后，本文主要對以下幾個方面進行研究： （ 1 ）鑒于已有研究多基於文克爾（單參數）地基模型，本文對雙參數地基上樑的計算方法（靜力和動力）進行了較為深入的研究，並對各種計算方法進行了比較。 -
Two parameter estimation methods of the texture model based on the gibbs distribution and neighbor pixels are adopted to extract the features of workpiece surface texture. tool wear condition is recognized by the feature parameters of texture
提出了基於gibbs分佈和基於近鄰像元的兩種紋理模型參數估計方法以提取工件表面紋理特徵，並利用紋理特徵參數對刀具的磨損浙江大學博士學位論文狀態進行判別。 -
The analytical and numerical solutions of the established mathematical model have been achieved. in the whole paper, two - parameter method is employed to calculate the coefficient of subgrade reaction or subgrade modulus
本文將雙參數法引入到土抗力模數或地基系數的計算中，並貫穿到整個結構計算中。 -
The global distribution of nssr can be provided by means of satellite remote sensing. in this paper a new parameterization derived by li zhan - qing ( li model ) in 1995 was used to compute the net surface solar radiation for 18 stations of chinese main land on some days over january and february in 2001. after compared the results of li model with those derived from a model ( li - leighton model ) and b model ( langley parameter model ) for clear - sky and cloud - sky respectively, we founded that the relative difference of the two model are below 6 %
結果表明：在晴天情況下， li模式與a模式很相近，而與b模式結果差別較大，因為b模式在晴空條件下是不準確的，這也可以從a模式與b模式的差別看出；在雲天情況下， li模式與b模式結果盡管有些差異，但是相似性仍然很好，除了個別的臺站外，絕大部分臺站兩者的相對差在6以內。 -
In the effective mass approximation, using the two - dimensional equivalent potential model and a simple two - parameter wave function, we calculate variationally the ground state binding energy and correlation energy of positively and negatively charged excitons in finite deep gaas - al0. 33ga0. 67as quantum wells. the results show fair agreement with the previous experimental results
在有效質量近似下，我們採用二維等效勢模型，並且選取了數學形式簡單、物理意義明確的兩參數變分波函數，利用變分法數值計算了有限深gaas ? al _ （ 0 . 33 ） ga _ （ 0 . 67 ） as量子阱中帶電激子的基態束縛能及相關能，所得結果與實驗結果符合得很好。 -
( 5 ) based upon numerical simulation, the effect of initial value and measure random error on back - analysis is discussed, and the first parameter and the second parameter of two - parameter model of the experimental field is identified using the experimental data
（ 5 ）通過數值模擬，分析了初值及測量結果隨機誤差對反分析結果的影響，並利用試驗數據，識別出試驗場地雙參數地基模型的第一參數與第二參數。
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