逼近

The trigonometric uniform polynomial curve constructed in this paper has two advantages. One is that the curve can be continuous and the shape can be adjusted with the fixed tangents. The other is that only adding one new knot, the curve can pass through the tangent, which reduces excess points.

利用绘出的三角均匀多项式曲线来逼近多边形，主要有2个特点：一是曲线能达到连续，并且在切点固定时曲线的形状可以进行调整，二是只需增加一个新节点就可以通过切点，减少了额外点。

With the shape parameter, the trigonometric polynomial curves can be close to the cubic Bécurves or close to the given control polygon then the cubic Bécurves.

由四个控制顶点生成的曲线具有与三次B zier曲线类似的性质，但具有比三次B zier曲线更好的逼近性。

With the shape parameters, the trigonometric polynomial curves can approach more to the quadratic Bézier curves or to the given control polygon than the quadratic Bézier curves.

由三个控制顶点生成的曲线具有与二次Bézier曲线类似的性质，但具有比二次Bézier曲线更好的逼近性。

At first, in this paper, the concept and type were introduced; afterwards, how to apply counter-examples in the higher mathematics was expatiated particularly in such aspects: concept、theorem、rule、formula and distinguishing true and false of the proposition; Finally, the construction of counter-examples was explored using special example、character、the method of approach as well as intuitional geometrical graphics.

本文首先简要介绍了反例的概念和类型；然后从概念、定理、法则、公式以及判别命题真假等几个方面，详细阐述了在高等数学中如何应用反例；最后，从利用特例、性质，采用逼近的方法以及直观的几何图形几个方面探讨反例的构造。

It consists of two parts: one is for one dimension and the other is for two dimensional case.

本文研究了一类插值逼近的收敛性质，分一元及二元两部分进行。

Point to successive two days appear steep fall, shanghai points to drop for a time approach 5000 bits of col, two city do much power to continue to drop, those who drop from Zhou San occupy about 7 Chengshangsheng arrives to be controlled most probably; And two city clinch a deal 267.2 billion yuan, continue to the limit of one's capacity 7 percent, point to appear to drop urgently continuously of to the limit of one's capacity bad go situation, have 21 drop more than 8%, part a brunt capital is more apparent from field evidence.

股指连续两天出现暴跌，沪指一度下跌逼近5000点关口，两市做多动力继续减退，下跌的个股从周三的约占七成上升到八成左右；而两市成交2672亿元，继续放量7个百分点，股指呈现连续急跌放量的不妙走势，有21只个股跌幅超过8%，部分个股主力资金离场迹象比较明显。

As Typhon Haitang draws closer to Taiwan, the National Science Counc il sent an airplane to the edge of the storm to test its intensity . They also took video footage of weather conditions at the scene.

趁著海棠台风逼近，国科会补助的「追风计画」今天凌晨又有飞机飞到台风的暴风圈，抛掷探测仪侦测台风结构密度，并且用摄影机拍下台风暴风圈外围的天气状况。

To draw up the extremum is unexhausted.

关于K值的逼近，怎样才能达到极值点，尚需进一步研究。

This method first gains shape vectors and texture vectors from given sample facial images of the same kind of expression. Then, based on the facial image morphable model, the linear combinations of the shape vectors and texture vectors of the unexpressive images are retrieved respectively using optimal linear fitting.

该方法利用人脸图像形变模型线性组合逼近的基本思想，确定合成表情图像的形状信息和纹理信息，其步骤简单，容易实现。

Though the sky is blue and the land is silent with green hills and blue water, the death, an invisible chain, covering around the neck of people, may kill you unguardedly.

死亡，渐渐逼近，惊恐，慌张，弥漫在清浅的空气中，天空蔚蓝，大地安详，山青水绿，可是死亡却像无形的枷锁，套在人生的项颈之上，稍不留神，便会被套牢封死。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。