三次曲线

VC6.0 prepared by the cubic Bezier curve drawing procedures, use MFC framework document View structure.

详细说明：这是用VC6.0编写的绘制三次Bezier曲线的程序，使用MFC框架文档视图结构。

The Geo-RS model of biomass is not only considered the vegetation spectral ,but also the other relative information, the accuracy of this model is better than the cubic curve fitting, but workload is large and the model is complex .

生物量的遥感地学模型由于不仅仅考虑到了植被的光谱信息，也考虑到了其他的相关信息而反演精度高于三次拟合曲线，但是工作量大，建模复杂。

Furthermore,a Cubic Curve-fitting equation deduces and set up.In the end,through a group of actual data,the effect of this new method is validated.

建立了三次拟合曲线方程，通过实际数据的检验，验证了该方法的拟合效果。

Therefore at each time we get the roots of this cubic equation, we can decide if we keep or reject each root according to the continuity of the curved surface, the method is as follows: If , the relative cubic plane curve is just a circle, this circle can be gotten by solving .

因此在每次求得该一元三次方程的解时，我们根据曲面的连续性来判断这些根的取舍，方法如下：在处，所得的平面曲线就是圆截线，该圆截线可以由相截得到，即。

For the data got by regional measuring mode in thickness measure, cubic spline is used to measure generatrix.

研究了基于三次样条曲线拟合及插值算法的壁厚测量数据可视化技术。

The stress-strain curve of new-old concrete and HPRRC, are suggested to be modeled by two sections: the ascending section of the stress-strain curve is simulated by cubic parabola equation and the descending section is simulated by rational fraction, where the theoretical value is in good agreement with the test value.

新—老砼及HPRRC应力—应变全曲线建议采用两段式拟合：上升段采用三次抛物线方程模拟，下降段采用有理分式模拟，理论值与试验结果吻合较好。

Cubic spline function fitting is a good method in the curve fitting because it is characterized by very good subsection smoothness.

三次样条函数拟合是曲线拟合的一个公认的较好方法，它具有很好的分段光滑性。

This procedure using cubic spline to be smooth margin function programming curve.

详细说明：本程序利用三次样条差值函数编程得到顺滑的曲线。

In view of the problems in the traditional highway vertical curve design,the cubic interpolation spline function replacing the conventional curve is proposed and the formula of function is demonstrated.

针对传统的公路竖曲线设计中存在的一些问题，可提出使用三次插值样条函数来替代传统线形的思路。

Objective:Since some limitaions of SRK Ⅱ formula,the dual cubic curved regressive formula was designed. methods:By means of computer,statistical analysis and regressive treatment of kerato diopter,axial length and emmetropic IOL diopter of 415 pseudophakia was done.

针对目前临床上常用的SRKⅡ公式在计算人工晶体屈光度时的局限性，对415只后房型人工晶体眼的角膜屈光力、眼轴长度和正视化人工晶体屈光度进行回归分析后，设计出一种不同于传统的线性回归公式的曲线回归公式——二元三次计算公式。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。