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一个完整四次的多项式由15项组成。A complete quartic polynomial consists of 15 terms.

而且四次式的方向盘又是怎么一回事啊？And what was the point of a quartic steering wheel?

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正交两圆柱的相贯线，一般是四次曲线。The intersection of two right circular cylinders is usually quartic curve.

况且，在平衡计算中常常发生比四次方程还高的高次方程。Moreover equations of degree higher than quartic often arise in equilibrium calculations.

本文讨论四次缺插值多项式样条。This paper is concerned with the problem of quartic lacunary polynomial spline interpolation.

这些结果都用有关的仿射不变量表示，可以用来控制四次T-曲线的形状。The results are denoted by related affine invariants, and can be used to control the shape of quartic T-curves.

针对一类四次隐式代数曲面，提出一种基于分片的几何参数化方法。This paper proposes a piecewise geometric approach to parametrize a kind of quartic implicit algebraic surface.

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提出了一种隐式曲面之间的求交方法，主要用于道路施工机械复杂曲面的求交计算。This paper proposes a piecewise geometric approach to parametrize a kind of quartic implicit algebraic surface.

观众参观全程需验票四次，请保持票面清洁平整。The visitors need to be quartic tickets checking during an entire journey, Please keep the face clean and smooth.

布朗单一参数四次指数平滑能更好地跟踪时序的非线性变化趋势，达到更好的短期预测效果。Quartic exponential smoothing method can follow the nonlinear trend of time series better and can also forecast better.

用四阶龙格——库塔法的基尔改进式，计算了单模锥体光纤的传输特性。The quartic Runge-kutta Method improved by Gill is used to Calculate the propagation Characters of a Single-mode taper fiber.

同时采用四次曲线进行了拟合，得出最佳工艺的压力范围。An optimum range of process pressures has been obtained through the combined analysis of test results plus quartic curve fits.

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对有理插值样条有关问题进行了分析，并在此基础上构造了一种带参数的分母为线性的四次有理插值样条。A kind of rational quartic spline with linear denominator is derived on the base of analysis about the question of rational spline.

应用四次B样条基函数计算梁的弯曲，表明了偶次B样条展开方式的合理性，同时也表明了该基函数有较佳的逼近性能和适应性。By using quartic B-spline basis function to calculate the bending of a beam, the example proves the reasonability of the expansion form.

研究了三向四次箱样条曲面与控制网格中心三角平面片间的距离和该距离的界。The distance from 3-direction quartic box spline surface to the central triangular planar patch of its control net is investigated as well as its bound.

而采用工作辊与中间辊弯辊相结合的板形前馈控制模型则对二次和四次板形均具有很强的控制能力。However, for work roll and intermediate roll bending compensation model both quadratic and quartic components of strip flatness can be controlled effectively.

最后，对二元切触有理插值存在性也进行了讨论，并给出有理插值函数的显式表示。In this paper, we discussed the existence, uniqueness, and approximation order of interpolation by bivariate quartic splines with B-Net in three direction meshes.

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本文讨论了一元四次方程无实根的一些充分、必要条件，并得到了一元四次方程无实根的一个充要条件。In this paper, we discuss when a quartic equation has no real roots, and obtain a necessary and sufficient condition on a quartic equation which has no real roots.

用微分方程定性理论结合数值模拟方法研究了一类非线性四阶波动方程的纽结波。The qualitative theory of ordinary differential equations and numerical simulation method are employed to investigate the kink waves of a nonlinear quartic equation.

用微分方程定性理论结合数值模拟方法研究了一类具有四次多项式势的非线性波方程的扭结波。The qualitative theory of ordinary differential equations and numerical simulation method were employed to investigate the kink waves of a nonlinear quartic wave equation.