查询词典 geometric figure

The aims of this thesis are researching some typical NURBS surfaces geometric continuous conditions and pointing out the effects of knot vector and the degree of surface on geometric continuities.

本文的目的是研究一些典型的NURBS曲面的几何连续条件，指出节点向量和曲面片的次数对几何连续性的影响。

The purpose of this study is to discuss students' geometric concept and meta-cognition of quadrilaterals by employing the geometric thinking model developed by Pierre van Hiele and the performance assessment.

本研究旨在结合van Hiele几何思考模式与实作评量，探讨学生的四边形几何概念及其后设认知。

The method first embeds watermark into the geometric invariant Fourier-Mellin domain of an image to weaken the geometric distortion, brought by printing process, of the watermark in presswork, and the image is then used to create presswork via a legal printing process. Secondly, the method rectifies rescanned image from the presswork by using Radon transformation and the embedded watermark in it is detected. Since there is an obvious difference between the destruction degrees of the watermark caused respectively by legal and pirated printing process, we can judge whether a copy of presswork is valid or not just by computing the ratio of the successfully derived watermark and comparing it with a predefined threshold.

该方法先将水印嵌入到具有几何不变性的Fourier-Mellin域中，以削弱正版印刷过程中的几何失真对水印的破坏；再利用Radon变换对由扫描印刷品所获得的图像进行矫正，并从图像中提取嵌入的水印信息；由于正版和盗版印刷过程对水印的破坏程度区别明显，该方法最终通过计算水印提取的正确率来度量这种破坏，并将其与预先制定的阈值进行比较来判定印刷品的正伪。

Geometric measurement is one of important means controlling the manufacture of parts and the quality of assemblies. So raising the accuracy, speed and detection ratio of geometric measurement is the urgent affairs.

公差检测是控制零件制造和装配质量的重要手段之一，提高公差检测的精度、速度和检测率是制造业的当务之急。

This paper discusses the close relation of geometry and architectural aesthetics in the aspects of ratio scale, geometric curved lines, geometric curved surfaces, etc.

几何与建筑美存在着密切关系，从比例分割、几何曲线、曲面等方面探寻了几何与建筑美的奇妙关系。

It also makes assessment on the geometric control results derived from cantilever construction of Sutong Bridge and presents some constructive suggestions for further application of geometric control methodology in erection of cable-stayed bridges.

文中还对苏通长江大桥双悬臂施工中应用几何控制法的结果进行了评估，并讨论得出了几何控制法在斜拉桥施工控制进一步广泛应用的一些有意建议。

The barycentric coodinates of the horizontal projection figure of coal face are solved with the aid of the formula of geometric centre of gravity.

地下开采煤层的分布形式多种多样，平面分布形式的煤层仅是曲面分布形式煤层的一种简单情况。

In topographic map, especially for city area, most of features are central symmetry and axial symmetry. By means of extracting features with symmetric figure first and then vectoring them according to their geometric characteristic, accuracy and efficiency can be increased and data sizes can be reduced.

在地形图中，轴对称和中心对称的要素占据着相当大的比例，特别是城市地形图中，房屋建筑等具有对称形状的要素占据了地形图中要素的绝大部分，在扫描图中首先对这些要素进行提取，进而根据特定要素的几何特征矢量化，可显著地提高矢量化精度和效率，减少数据的储存量。

The generatrix of a geometric figure.

几何形状的母量

By the new learner which causes The Geometer's Sketchpad can in the short time grasp The Geometer's Sketchpad the application, and can use The Geometer's Sketchpad to make the beautiful geometric figure, and some pleasant animation effect.

以使几何画板的初学者能在短时间内掌握几何画板的应用，并能用几何画板作出美丽的几何图形，及一些令人赏心悦目的动画效果。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48