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过抛物线外一定点作其法线的求解分析及其几何迭代作图
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作者 郭朝勇 刘传恩 《河北工业大学学报》 CAS 1998年第1期100-105,共6页
对过抛物线外一定点的法线作图问题作了探讨,指出了几何作图法的不可解性.根据抛物线与其法线的几何特征关系建立了求解析方程,分析了法线问题解析求解的繁杂性.指出了一种几何迭代作图方法,并具体给出了该方法的几何作图步骤.
关键词 抛物线 抛物线法线 几何作图 几何迭代 机械制图
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Qualitative Analysis and Explicit Exact Solitary,Kink and Anti-Kink Wave Solutions of the Generalized Nonlinear Schrdinger Equation with Parabolic Law Nonlinearity
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作者 何斌 蒙清 《Communications in Theoretical Physics》 SCIE CAS CSCD 2016年第1期1-10,共10页
The generalized nonlinear Schrdinger equation with parabolic law nonlinearity is studied by using the factorization technique and the method of dynamical systems.From a dynamic point of view,the existence of smooth so... The generalized nonlinear Schrdinger equation with parabolic law nonlinearity is studied by using the factorization technique and the method of dynamical systems.From a dynamic point of view,the existence of smooth solitary wave,kink and anti-kink wave is proved and the sufficient conditions to guarantee the existence of the above solutions in different regions of the parametric space are given.Also,all possible explicit exact parametric representations of the waves are presented. 展开更多
关键词 vSchrodinger equation with parabolic law nonlinearity qualitative analysis smooth solitary wave kink and anti-kink wave explicit exact parametric representation
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GEOMETRIC ERROR CONTROL IN THE PARABOLA-BLENDING LINEAR INTERPOLATOR 被引量:1
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作者 LI Hongbo ZHANG Lixian 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2013年第5期777-798,共22页
This paper considers geometric error control in the parabola-blending linear interpolation method(Zhang,et al.,2011).Classical model of chord error by approximation with contact circle on the parabolas leads to incorr... This paper considers geometric error control in the parabola-blending linear interpolation method(Zhang,et al.,2011).Classical model of chord error by approximation with contact circle on the parabolas leads to incorrect result.By computing the geometric error directly without accumulating the approximation error and chord error,the authors realize correct geometric error control by establishing inequality constraints on the accelerations of the motion. 展开更多
关键词 Chord error GO1 code interpolation geometric error NC machining parabola-blendinginterpolation.
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PARALLEL STABILIZATION
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作者 J. L. LIONS(College de france,3,red’Ulm,75231 Paris Cedex 05,France) 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 1999年第1期29-38,共10页
A new algorithm for the stabilization or (possibly turbulent, chaotic) distributed systems,governed by linear or non linear systems of equations is presented.The SPA (Stabilization Parallel Algorithm) is based on a sy... A new algorithm for the stabilization or (possibly turbulent, chaotic) distributed systems,governed by linear or non linear systems of equations is presented.The SPA (Stabilization Parallel Algorithm) is based on a systematic parallel decompositionof the problem (related to arbitrarily overlapping decomposition of domains) and on a penaltyargument.SPA is presented here for the case of linear parabolic equations, with distributed or boundarycontrol. It extends to practically all linear and non linear evolution equations, as it will bepresented in several other publications. 展开更多
关键词 SPA Linear parabolic equation Distributed system
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