查询词典 geometric drawing

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。

It contains all the necessary functions for drawing various geometric and freehand shapes and organizing them on the page.

它包含在页面上绘制各种几何形状、任意形状和管理它们必需的所有功能。

A mandala is a drawing that is used in meditation because it tends to draw your focus back to the center, and it can be as simple as a geometric figure or as complicated as a stained glass window.

曼陀罗是一种用以沉思的图像，因为它会将你的注意力集中在中心的焦点。而它可能单纯如几何图形，也可能复杂如彩色玻璃窗。

Spatial analysis procedures are completed basic geometric figure drawing, and completed gis Lane buffer analy...

空间分析程序完成基本几何图形的绘制，并且完成gis里缓冲区分析，部分完成了多边形之间关系的功能！

General use Mathematics, Geometric, Drawing, Chemistry and Physics, Biology and Medicine, Prefix Used wuth SI Units, si dERIVED Units, Subatomic Particles and Quanta, International System of Units Signs and Symbol Print version

常用数学，几何，绘图，化学，物理，生物，医疗，国际单位字首，国际导出单位，次原子粒及国际单位符号表列印版本

The first class of curve contains the quartic Wang-Ball and Said-Ball curve and many curves locating between them. The second class of curve contains the quartic Said-Ball and Bézier curve and many curves locating between them. By analyzing the relation between the new curves and the quartic B6zier curve, the geometric meaning of the shape parameters is obtained, and the geometrical drawing method of the new curves is given.

第一种曲线包含了四次Wang-Ball和Said-Ball曲线以及介于它们之间的无数曲线；第二种曲线包含了四次Said-Ball和Bézier曲线以及介于它们之闻的无数曲线；通过分析新曲线与四次Bézier曲线之问的关系，得出了形状参数的几何意义，并给出了它们的几何作图法。

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