心脏线

给出了快速绘制心脏线的逐点算法。

For the cardioid curve , a fast pixel-level drawing algorithm is presented .

心脏线的逐点生成算法

A Pixel-Level Algorithm for Generating the Cardioid Curve

心脏线的下方是“头脑线”，若纹路清晰，表明此人聪明；

Below the heart line is the head line . If the head line is strongly marked it is supposed to indicate intelligence ;

基于曲线表达式的特点，该算法将心脏线的点坐标迭代关系转化为几个简单的迭代关系的线性组合。

By taking advantage of the characteristic of the curve s ' expression , the algorithm changes the cardioid curve into the linearly combination of some simple iterations .

“心脏线”指贯穿手掌的横线，这条线若长而无中断，则意味着为人热情或易于感情用事。

The heart line stretches across the palm just below the fingers . If this line is long and unbroken , the person is supposed to have a warm , affectionate nature .

独立给出了稳定不动点的参数集是填充的心脏线、稳定二周期轨的参数集是填充的圆的结论。

This paper independently comes into the conclusion that the parameter set of the stable fixed points is the stuffing cardioid , and the parameter set of the stable two periodic orbit is the stuffing circle .

此外由于它们还具有三角函数的优点，故既可以精确表示直线段、二次多项式曲线段又可以精确表示圆弧、椭圆弧等二次曲线以及心脏线、双纽线等超越曲线。

They not only inherit the advantages of Bezier curves and B-spline curves , also can be used to represent straight lines precisely and some remarkable transcendental curves precisely , such as circular arc , ellipse , cardioids and twisted pair line etc.

方法采用实时超声对750例妊娠16～40周正常孕妇的胎儿心脏及胸腔径线的测量和面积计算，并得出每一孕龄组的胎儿心脏面积与胸腔面积的平均比值。

Methods Among 750 normal pregnant women with gestational ages from 16 to 40 weeks underwent ultrasonographic measurement of the fetal heart and chest diameters and areas .

本文应用彩色多普勒对417例正常小儿（年龄1天－14岁）按体重分组法，进行心脏血流、四心脏径线及其比值的研究。

Using Doppler color flow image to estimate cardiac bind flow and four chamber diameter and their ratio of 417 health children ( age : one day - fourteen age year ) in relation with their body weights divided into groups .

本文对兰州地区60例新鲜流产胎儿（男35例，女25例），进行了身长、体重、心脏重量及心脏各径线的测量。

60 fresh abortive fetus were studied , including 35 male and 25 female . Their body height , body weight , weight and various diameters of the heart ( the long diameter , the transvers diameter and anterior-posterior diameter ) were measured .

针对用不同轮廓线提取方法对心脏断层图像提取的心脏表面轮廓线数据产生的格式不同，研究并设计了一种通用的心脏表面三角网格重构方法。

For the difference of data format of heart surface contours extracted by different ways , through utilizing the basic characteristics of the heart shape and slice data , a general method of heart surface triangular mesh reconstruction was studied and designed .

在心脏MRI图像处理中，传统的水平集方法仅仅使用了图像边缘梯度信息，受到图像弱边界，强结构噪音，以及心脏MRI标记线（Tag）的影响，得不到正确的结果。

Classical Level Set method only used image gradient information in cardiac MRI segmentation . In can hardly get nice result because of strong structural noise , image weak edge and tag line .