查询词典 cosine curve

In this paper, a region approximation idea that means using a "fat curve" with a width to approximate the offset curve is proposed, and a complete set of algorithms to approximate offset curve using disk Bézier curve are given and implemented. In the algorithms, the optimal and uniform approximate curve of the offset curve as the central curve of the Disk Bézier curve is found by using Remez method, and then the upper optimal and uniform approximation principle is proposed to compute the error radius function of the Disk Bézier curve. Thus, the whole Disk Bézier curve can be obtained. In the end of this paper, the approximate effect of the Disk Bézier curve is not only analyzed and assessed, but also some specific examples are provided.

提出用一条带宽度的"胖曲线"来逼近上述等距曲线的区域逼近思想，并建立与实现了圆域Bézier曲线等距逼近的整套算法，包括应用Remez方法求出等距曲线的最佳一致逼近曲线作为圆域Bézier曲线的中心曲线，提出上控最佳一致逼近的原理求出圆域Bézier曲线的误差半径函数，以及确定整条圆域Bézier曲线，最后还对该圆域Bézier逼近的效果做了分析和考核，并给出了一些具体实例。

This paper establishes cubic spline function, analyzes subsection curve function and curve slope and curvature, at last decides to place the curve especial points which can be obtain easement curve length and other line parameters, such as the ZH point (end of line and beginning of transition curve), the HY point (end of transition curve and beginning of circular curve), the QZ point, the YH point (end of circular curve and beginning of transition curve), the HZ point (end of transition curve and beginning of line).

针对公路平面线形的8种组合类型，其线形元素特征则由最基本的直线、圆曲线、缓和曲线组成的特点，解析三次样条函数模型，得分段曲线函数、曲线斜率、曲率，从而确定曲线特征点（直缓ZH点、缓圆HY点、曲中QZ点、圆缓YH点、缓直HZ点）位置，进而得到曲线缓和曲线长度及其他线形参数。

According to the Poisson equation of gravity-magnetic potential, we derive the relation of cosine transform spectrum between magnetic potential and magnetic field constituent and deduce the cosine transform spectrum formula of n degree derivatives using the cosine transform.

根据重磁位场的泊松公式，利用余弦变换给出磁位与磁场分量间的余弦变换谱关系，推导出磁异常n阶导数的余弦变换谱公式。

In this paper we introduce the hyperbolic cosine function and construct the new hyperbolic cosine penalty function and algorithms, further more, we construct the new hyperbolic cosine multipier penalty function .

本文在传统形式的罚函数基础上引入双曲余弦函数做罚项，构造了新的对于一般约束优化问题的双曲余弦罚函数和求解迭代公式；进一步地，又提出了求解具有等式约束优化问题的双曲罚函数乘子法。

The parameter of the cosine function affects the center of time gravity of the cosine-Gauss pulse in a certain range, even for the cosine-Gauss pulse whose pulse width is longer than one optical oscillation period.

余弦函数的参量在一定取值范围内对余弦-高斯脉冲也有较大的影响，它可能导致几周期余弦-高斯脉冲的时间重心有较大的漂移。

Cosine law of spherical triangles : in the spherical triangle , either side of the hot core corresponding to the cosine of angle equal to each other on both sides of the corresponding hot core product with the cosine angle on both sides of each angle of the sine and the corresponding spherical center piece of any side in the spherical triangle in ...

球面三角形余弦定律：在球面三角形中，任意一边所对应球心角的余弦等于其他两边各自对应球心角的余弦乘积加上这两边各自对应球心角的正弦及任意的那条边在球面三角形中。。。

In this paper, the design of the cosine modulated filter banks with perfect reconstruction are studied in details with emphasis on the design of biorthogonal cosine modulated filter banks and oversampled cosine modulated filter banks.

本论文主要讨论了完全重构的余弦调制滤波器组设计方法，其中的重点是完全重构低延迟双正交余弦调制滤波器组和过采样余弦调制滤波器组。

Through theoretical analysis and experiment simulation, transmission effect in trapezoid wire winding curve and the double cosine half-wave speed rule curve is researched. And the wire winding algorithm of single cosine half-wave is proposed.

通过理论分析和实验仿真的方法，深入研究梯形走线规律曲线和双余弦半波速度规律曲线的传动效果，提出单余弦半波走线算法。

The test results indicate that Lambert cosine radiation characteristic of the new method has a distinct improvement, and the incidence normalized curve approaches to the standard cosine curve in the 0° and 45°.

测试结果表明，新工艺的朗伯余弦辐射特性得到明显改善，在0°与45°入射时，归一化曲线接近标准余弦曲线；300 nm处半球反射率均匀度从0.77提高到0.98；200~400 nm处半球反射率平均提高33%；将其应用于紫外－真空紫外遥感仪器上进行了角度响应测试，漫反射特性明显优于美国2002年发射的同类仪器SBUV/2。

The test results indicate that Lambert cosine radiation characteristic of the new method has a distinct improvement, and the incidence normalized curve approaches to the standard cosine curve in the 0° and 45°. Moreover,with the new mehtod, hemisphere index of reflection uniformity increases from 0.77 to 0.98 at 300 nm and the hemisphere index of reflection averagely enhances by 33% at 200~400 nm.

测试结果表明，新工艺的朗伯余弦辐射特性得到明显改善，在0°与45°入射时，归一化曲线接近标准余弦曲线；300 nm处半球反射率均匀度从0.77提高到0.98；200~400 nm处半球反射率平均提高33%；将其应用于紫外-真空紫外遥感仪器上进行了角度响应测试，漫反射特性明显优于美国2002年发射的同类仪器SBUV/2。

But the most wonderful thing about Harbin is the yearly Ice and Snow Festival which lasts for a month in January.

但是那里最为引人入胜的还要数每年一届的冰雪节。

How to choose the inducts method is not the most import.Choosing the method that suits the current course content is the most important.

选择怎样的导入方式并不是最重要的，重要的是选择适合本课教学内容的方式。