Based on the fourier series digital approximation method , the optimal design of flat - top and high isolation pass band frequency response interleaver has been studied . at last a solution of high isolation ( > 45db ) 用傅立葉級數(shù)展開數(shù)值逼近的方法進(jìn)行了高隔離度平頂通帶頻響全光纖奇偶交錯(cuò)濾波器的優(yōu)化設(shè)計(jì),提出了隔離度大于45db通帶平坦濾波器的制作方案。
By orthogonal polynomial approximation method , we first reduce the random system into its deterministic equivalent one , so the response problem of a random system can be transformed into that of a deterministic system 有關(guān)上述gegenbauer多項(xiàng)式方法在隨機(jī)振動問題中的應(yīng)用,現(xiàn)有文獻(xiàn)中尚未見報(bào)道。上述三種方法都可以用于求解隨機(jī)結(jié)構(gòu)的演變隨機(jī)均方響應(yīng)問題。
The main design procedure involves the use of a feasible approximation method to establish a finite - dimensional and interconnected nonlinear dynamics , and then utilize the cascaded nonlinear feedback design for achieving uniform output regulation 主要設(shè)計(jì)方式擬先采用可行近似方法建立一有限次元及內(nèi)都串聯(lián)的非線性動態(tài),接著利用串級非線性回饋控制設(shè)計(jì)使得均一輸出能規(guī)則化。
The gaussian approximation method used in single traffic cdma system is introduced , at the same time the improved gaussian method also discussed for greater accuracy , when the active user load is small . however , the improved gaussian method needs more complicated calculations 研究gsc的結(jié)構(gòu)以及其輸入端信號的統(tǒng)計(jì)分布,為我們后面研究多速率擴(kuò)頻系統(tǒng)分集合并的gsc接收機(jī)作一些必要的數(shù)學(xué)準(zhǔn)備。
The bose - hubbard model is a basic model which contains main features in the strongly interacting bose systems . various aspects of this and related models were previously investigated analytically by quantum monte carlo method ( qmcm ) , mean - field approximation method and so on 本文利用玻色子算符的微分實(shí)現(xiàn)來重新構(gòu)造bose - hubbard模型的哈密頓量,并展開對一維bose - hubbard模型精確數(shù)值解的研究。
In this paper , we study the periodic solutions of the impact oscillator with damping . first part , using continuation lemma and approximation method , we prove the existence of 2 - periodic admissible solutions for a class of second order bouncing differencial equations with damping 在第一部分里,我們運(yùn)用延拓引理與逼近框架,對于一類帶阻尼的二階碰撞方程,證明了2 -周期碰撞允許( admissible )解的存在性。
By the polygonal approximation method , a global approximation solution is constructed for the initial - boundary value problem of nonconvex scalar conservation laws with two - side boundary effect , and its convergence to the global weak entropy solution of the corresponding problem is proved 摘要使用折線逼近法,對具有兩條邊界影響的非凸單個(gè)守恒律初邊值問題構(gòu)造了整體近似解,并證明其收斂到初邊值問題的整體弱熵解。
Making full use of the correlated space information of multi - beam bathymetric data , the author put forward a method of gaussian surface approximation to build the grid net of regular digital terrain model ( dtm ) of surveyed seafloor , which is more accurate than other approximation methods 本文充分利用了多波束數(shù)據(jù)的空間相關(guān)信息,提出了一種基于高斯地形曲面擬合的數(shù)字地理模型數(shù)據(jù)網(wǎng)格化方法,準(zhǔn)確快速地得到標(biāo)準(zhǔn)等深線圖。
In order to obtain an optimal estimate of the tilt angle and angle velocity , an indirect kalman filter configuration combining a rate gyroscope sensor and an accelerometer is implemented . because of the extreme nonlinearity of the two - wheeled self - balancing robot , application feasibility of nonlinear system control strategy based on linear approximation method , exact linearization and intelligent control have been investigated . according to robustness , balancing performance and environment adaptability , robust tracking control , linear quadratic regulator and fuzzy model reference learning control are implemented to the velocity controller 針對具有強(qiáng)非線性的前進(jìn)子系統(tǒng),論證了基于近似線性化、精確線性化及智能控制的非線性系統(tǒng)控制策略的應(yīng)用可行性,據(jù)此按照不同性能要求設(shè)計(jì)了三種前進(jìn)速度控制器:漸近跟蹤魯棒調(diào)節(jié)器簡單精確,具有良好的干擾抑制能力;二次型最優(yōu)跟蹤控制器,在耗能最小的條件下,大大提高系統(tǒng)的平衡能力;而基于動態(tài)聚焦學(xué)習(xí)的模糊模型參考學(xué)習(xí)控制則兼具平衡性能好、環(huán)境適應(yīng)性強(qiáng)、精度高及魯棒性好的優(yōu)點(diǎn)。
It is well known that the coupled interactions between the ship hull and the surrounding fluid field of explosion give rise great influence to both the fluid loadings over the structural wetted surface and the responses of the hull . jt is the coupling effect that provides the major difficulties in the underwater explosion induced dynamic responses of the ship structure . the second order doubly asymptotic approximation method ( dda2 ) has been commonly employed in the world to deal with the coupling effect 本文針對daa方法不適合于分析敷有聲阻抗與水差不多的聲學(xué)材料(如玻璃鋼與消聲瓦)的船體結(jié)構(gòu)與水下沖擊波相互作用的局限性,依據(jù)聲波的反射和透射原理對二階daa方法的高頻段進(jìn)行了改進(jìn),發(fā)展并提出了能夠分析聲學(xué)材料流固相互作用的adaa方法( acousticdaa ) ,拓展了應(yīng)用范圍,使現(xiàn)有的二階daa方法成為它的一個(gè)特例。