二次函数

It can be indicated by the practical example that the fractal-interpolated surface function is obviously superior to the quadric polynomial surface for the fitted accuracy of the height anomaly.

实例计算结果表明，分形插值曲面函数拟合高程异常的精度明显优于二次多项式曲面。

The change of parameter {a, b, c, d} with temperature in double exponential function can be expressed as a quadric polynomial function of temperature.

双指数函数中的参数{a， b， c， d}随温度的变化可以表示成温度的二次多项式函数。

Considering various contributions of the nonlinear response from the bulk and interfaces, the interface strain implies an nonuniform inhomogeneous intensity variation of second harmonic generation as functions of the surface azimuthal rotation angle ψ.

考虑来自於薄膜及介面的非线性响应，我们发现不均匀的介面应力对二次谐波的贡献为方位角ψ的函数。

Under the effect of motive force of sheet now, erosion amount increases with the slope gradient as power function; under the co-effect of spitshment and flow, erosion amount...

在薄层水流动力的作用下，侵蚀量随地表坡度增加呈幂函数增大；在击溅和水流共同作用下，侵蚀量与地表坡度呈二次抛物线型关系。

The number and distribution of the singular points of streamlines in the cross section of steady flow through a curved tube are discussed by using the method of topological structure analysis.

利用拓扑结构分析方法，分析了弯曲圆管内定常流在横截面上流线的奇点个数及分布规律，给出了二次流的漩涡数目由 2个变为 4个，流态结构发生分叉现象的理论判据·进而，利用Galerkin方法，得到了弯曲圆管内定常流的流函数和轴向速度的半解析表达式，给出了流态结构发生分叉现象的临界Dean数，所得结果与理论判则一

The effect of curvature, torsion and Dean number on secondary flow, the isoline of stream function, the distribution of axial speed and wall friction is discussed in detail.

详细讨论了曲率、挠率、Dean数对二次流动、流函数等值线和轴向速度的分布以及壁面摩擦力的影响。

In this paper, the inertial theorem of real symmetric matrix has been proved by three methods in three aspects: the relationship between real symmetric matrix and real quadratic form, the relationship between real symmetric matrix and symmetric bilinear function of real linear space.

从实对称矩阵与实二次型的联系、实对称矩阵与实线性空间的对称双线性函数的联系以及将实对称矩阵作为研究主体这三个角度，介绍实对称矩阵的惯性定理的三种证明，以期加深对实对称矩阵的惯性定理的理解。

In this text we used the method of volume integral equation base on tensor Green's function to study the forward of 4D transient electromagnetic response.

本文采用基于张量格林函数的体积分方程法进行四维模型瞬变电磁响应的正演研究，文章中首先说明了四维瞬变电磁法模拟的可行性及程序实现，然后分别设计了两个三维异常体模型，采用两种观测方式(激发与接收平行、激发与接收垂直)进行正演模拟计算，并对所得的二次总场的数据进行了分析。

The top-hat filter of gray level morphology could detect small targets defined by structure element efficiently.

本文采用了均值偏移算法常用的概率分布函数匹配技术，对检测出的小目标进行二次确认。

So cooperative controlling of driving force of wheel is a key of trafficability on tough lunar terrain.Based on SQP algorithm,driving force of wheel was optimized. Optimization is based on restriction of moving safely and smoothly.The aim of optimization is to minimize power consume of motors and varying range of driving force.

本文基于序列二次规划算法优化摇杆-转向架式月球车车轮系统驱动力输出，建立保证月球车在月壤平稳安全通过的力学约束方程，以车轮驱动功率和驱动力变化最小为目标函数优化车轮驱动力输出，使月球车平稳前进的同时车轮驱动电机功率消耗最小，这对能源有限的月球车来说是很有意义的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。