次参数 meaning in English
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Examples
- Zhanwen li and guiding gu , restarted fom augmented with ritz vectors for shifted linear systems , numer . math . ( j . chinese univ . ) ， 15 （ 2006 ） 40 - 49
顾桂定，林磊和周献丽，二次参数方程组的线性化模式比较，应用数学与计算数学学报， 20 ( 2006 ) 33 - 41 - 3 zhang c , cheng f , miura k . a method for determing knots in parametric curve interpolation . cagd , 1998 , 15 : 399 - 416 . 4 fritsch f n , carlson r e . monotone piecewise cubic interpolation
文章以四组有代表性的数据为实例，通过定义节点用样条函数方法构造三次参数样条曲线，将新方法与向心参数化法修整弦长参数化法和二次精度方法进行了比较。 - An approach of two point temperature correction parameter compensation is presented in this paper , it can compensate the parameter accuracy according to the real - time signal dynamic range , the parameter can be modified near to its theoretical value
文中探索了一种二次参数补偿的两点温度定标方案，由基本公式得到的校准参数值，再依据现实信号动态范围进行实时精度补偿，使之更加接近于理论计算值，从而使非均匀性校准的系数精度得到较大幅度提高。 - The constructed surface is c2 continuous on the whole domain , and is a piecewise cubic parametric polynomial on every subdomains . the interpolating surface can preserve the convexity , concavity , inflection property and monotonicity of the data set . in the end , each algorithm brought forward in the paper is exemplified , at the same time , error is discussed
3针对保形曲面插值问题，提出了一种插值于给定数据点集的参数型保形曲面插值算法，所构造的曲面在整个区域上是c ~ 2连续的，在每个子区域上是分片三次参数多项式，并且保持被插函数集的所有子区域的边界及其内部的轴向单调性、凸凹性以及拐点性质。 - Several key techniques of carving and milling machine cnc system are deeply studied they include : the transformation , data rebuild and interface design of huge volume nc program produced by cam ; the algorithm of cubic parametric spline pre _ interpolation and high speed real time interpolation in the cnc system , which . will gain a much higher surface precision and cutting speed ; methodology and algorithm of movement velocity acceleration control on a real time forecast _ and _ prejudge basis is designed . therefore , a smooth movement is insured . the shake and noise problem caused by non _ uniform pules for driving stepping or servo motor is solved by an improving algorithm to generate uniform pules
同时，本文对基于统一的pc平台的雕铣机数控系统中的几项关键技术进行了深入的研究，包括： cam生成加工程序的传送、接收、读取及其加工链表的生成和实时重构；对cam生成的离散数据进行三次参数样条插值和基于累加弦长的三次参数样条插补控制，保证加工工件表面的精度和光顺性；设计具有“前瞻”功能的自动升降速控制方法，保证加工过程的平稳性；通过脉冲均匀化，有效地解决加工过程中因为脉冲不均匀而引起的震动问题。