With the similar technique , they gave a complete description of the connectivity and the totally disconnectivity of the julia sets of cubic polynomials 他們用類似的拼圖技巧,對三次多項(xiàng)式的julia集的連通性和完全不連通性作出了完整的描述。
Based on the historical data of shanghai port container throughput , forecast models are established by using grey prediction model and cubic polynomial curve prediction model 摘要利用上海港國際集裝箱吞吐量的歷史數(shù)據(jù),分別采用灰色預(yù)測法和三次多項(xiàng)式曲線模型建立了單項(xiàng)預(yù)測模型。
In order to obtain a high - quality speech codec , the phase information of speech should be included in codec . in this thesis , a method for quantizing the phase of sew ( slowly evolving waveform ) and reconstructing sew ’ s phase with cubic polynomial interpolation is given based on the perceptual weighting analysis - by - synthesis ( a - b - s ) vector quantizer for the phase spectrum in wi coder 本文基于感覺加權(quán)相位譜分析合成( abs - analysis - by - synthesis )矢量量化方法,給出了一種wi編碼器中慢漸變波形( sew - slowlyevolvingwaveform )的相位信息量化及合成端相位的三次多項(xiàng)式插值重建方法。
The methodology adopted by most existing cam / cnc systems , which uses huge amount of linear segments to approach the original shape and make linear interposition increases the cost of memory size and communication work of the cnc system tremendously . a new approach based on cubic polynomial and b spline interposition to rebuild the cam generated tool path under real time condition is presented in the paper . applications on cnc machine tools showed that the presented approach improves the machining accuracy and increases the cutting speed significantly 目前大多數(shù)cam / cnc系統(tǒng)采用大量小直線段逼近原始曲線和直線插補(bǔ)的做法,只能獲得零階連續(xù)的走刀軌跡,逼近精度低,不能保證高速加工運(yùn)動(dòng)的平穩(wěn)性,因而加工精度、光潔度和加工速度都難以提高;由小直線段構(gòu)成的nc代碼數(shù)據(jù)量龐大,也增加了數(shù)控系統(tǒng)在內(nèi)存容量和數(shù)據(jù)傳輸方面的成本。