Approximation method based on qurbs ( quasi - uniform rational b - spline ) is adopted and a iterative algorithm is introduced to improve the precision in the paper 在曲面片的逼近中采用邊界替換算法以保證曲面片具有公共的邊界曲線,所以達(dá)到gc ~ 0連續(xù)。
This paper puts forward a new method for calculating anomaly area - the polygonous approximation method , and gives corresponding algorithm and precision - controlling technique 摘要提出一種新的異常面積計(jì)算方法多邊形逼近法,并給出相應(yīng)的算法和精度控制方法。
Secondly , analysed the approach model , described circular arc approximation method , approaching blade curved surface with this method and realized raise of the approach speed 其次,分析了逼近模型,推導(dǎo)了單圓弧逼近方法,用這一方法來逼近葉片曲面,提高了逼近速度。
Depending on the image method and point source approximation method , the physic model was established , and the formula of photo - current versus surface recombination velocity was obtained 導(dǎo)出了光電流與表面復(fù)合速率相應(yīng)關(guān)系的計(jì)算公式,確定了可進(jìn)行電量測(cè)量的實(shí)驗(yàn)裝置。
Secondly , as for degree reduction of interval rational bezier curves , two methods are given : pseudo linear programming method ( plpm ) and pseudo optimal approximation method ( poam ) 接下來對(duì)區(qū)間有理bezier曲線,給出兩種降階逼近算法:擬線性規(guī)劃法( plpm )和擬最優(yōu)逼近法( poam ) 。
Using local base surface parameterization , a parametric quadric surface approximation method is used to estimate the local surface curvature properties of scattered points based on propagating normal vector direction 首先,計(jì)算各點(diǎn)的鄰近點(diǎn)集,選取合適的局部基礎(chǔ)曲面,把鄰近點(diǎn)集投影到相應(yīng)的局部基礎(chǔ)曲面。
A parabolic regularity ( viscosity method ) and difference schemes in the rectangle mesh is constructed and convergence rata is obtained in the norm l1 . his approximation method is lately called kuznetsov approximation t 85 ]得到補(bǔ)償緊引理,并推得著名的div一curl引理,他給出了當(dāng)一致l加估計(jì)序列的任意嫡消失測(cè)度在式
In each step of the sequential design , an individual controller is designed by the robust frequency response approximation design procedure , the controller order is reduced by a frequency response approximation method 在序列控制器設(shè)計(jì)的每一步,單個(gè)魯棒控制器用魯棒頻域響應(yīng)近似法獲得,并使用頻域響應(yīng)近似法進(jìn)行控制器降階。
Second part , using approximation method and implicit function theorem , we obtain the existence of large amplitude 2 - periodic bouncing for damped linear impact osillator with mutiple impacts in one period 在第二部分里,我們運(yùn)用逼近框架與隱函數(shù)定理,對(duì)于帶小阻尼的線性碰撞振子,證明了在一周期內(nèi)發(fā)生多次碰撞的大振幅2 -周期解的存在性。
The expressions for correlation functions , power spectrum and correlation time of the intensity of a single - mode laser driven by two white noises with a exponential function correlation form were calculated by linear approximation method 應(yīng)用線性近似方法,計(jì)算了具有指數(shù)形式關(guān)聯(lián)的兩白噪聲驅(qū)動(dòng)下單模激光光強(qiáng)的關(guān)聯(lián)函數(shù)、功率譜及關(guān)聯(lián)時(shí)間。