查询词典 geometric

Many methods is overviewed and many new techniques are also proposed.The graph-based geometric constraint solving method proposed by C.M.

本文首先回顾了CAD技术发展的历史，然后进一步详细分析了国内外一些典型的约束求解方法，并对各种方法的优缺点进行了详细的评述和综述。

Based on these constraints for distance geometric computation, the structure of Blue Crab MT whose conformation has been measured by NMR was predicted.

以上述结构特征为基础，构建了用于结构计算的约束条件，建立了一种基于距离几何算法的蛋白质结构预测方法。

There are three main features that characterize beautiful faces: the geometric feature of bilateral symmetry, the mathematical feature of averageness, and the biological feature of secondary sexual characteristics.

美丽的面孔具有三个主要特征：左右对称的几何特征、平均化的数学特征和第二性征的生物特征，这些都表明他们在基因与发展上更健康。

Secondary sexual characteristics. Unlike the geometric concept of bilateral symmetry and the mathematical concept of averageness, the biological concept of secondary sexual characteristics differ for the sexes.

第二性征：与几何上左右对称的概念、数学上平均值的概念不同，生物上的第二性征概念是有性别差异的。

In addition, many studies of patients with AVN showed plenty of special characteristics,such as age distribution and bone quality.Objective:To study the geometric features of proximal femur for the Chinese AVN population,in order to prove the existence of special characteristic of proximal femur for the disease and then develop an AVN-specialized stem evaluated by a validated finite element analysis.Methods:1.The author investigated the standard X-ray data of 127 cases(179 hips) with definite diagnosis of AVN to provide anatomical references for this disease.At the same time,we conducted a meta-analysis of anatomical studies of normal proximal femur data,including the section of LT+20,LT,LT-20 and CFI to identify the potential difference between AVN and normal population.

方法1、通过研究AVN患者标准X线正、侧位片127例(179髋)，获得股骨近端的解剖学数据，利用荟萃分析的方法比较AVN患者股骨近段髓腔特征平面(LT+20，LT，LT-20)及CFI的改变与以往研究数据的差异，并利用创伤性FNF患者资料代替正常人股骨数据进一步比较髓腔前、后、内、外四条曲线段上的差异。2、通过结合现代CAD技术，将内、外、前、后曲线拟合到AVN柄的外形上，选用短柄假体设计，近段设计利用AVN患者骨髓腔CT相对应位置的断面进行修正，设计AVN人工股骨柄。3、计算机三维有限元分析：①使用CAD软件SolidWorks和有限元软件Ansys所建立的髋关节股骨侧假体置换后的三维有限元模型。

This paper addresses the control problem of a variable speed wind turbine system in above rated wind speed which uses pitch angle control of the blades and delay angle control of the rectifier,with special emphasis on the differential geometric theory.

讨论了在额定风速以上时变转速风力机的控制问题，系统采用基于微分几何理论下的桨距角和触发角双输入控制。

The art development of Giorgio de Chirico is divided into seven periods : art cultivation、exploration、space consciousness、geometric architecture、return classicism、dualism and classical consciousness , which described the style transformation of Metaphysical painting .

本研究将基里诃一生艺术发展归纳为：艺术孕育期、创作探索期、空间意识期、几何建筑期、回归古典期、二元对立期和古典意识期等七个分期，来阐述「形而上绘画」的形式风格转变。

At the same time, Léger's predilection for geometric and rectilinear backgrounds may show a "Purist" sensibility influenced by the principles of De Stijl, and, in particular, the paintings of Piet Mondrian.

同时，雷捷偏爱几何学及直线构成的背景，可说是受到风格派中，特别是皮耶蒙德利安的油画影响，表现出纯粹派艺术家的风格。

Delaunay triangulation is one of the key parts in the field of computer-aided design,geometric modeling and computer graphics.

Delaunay三角剖分是计算机辅助几何设计、几何造型及计算机图形学中的重要研究内容之一。

the ccd image sensors have been wide ly used in industrial process measurement and control systems owing to their wid e spectral response,wide dynamic range,high sensitivity and geometric precision ,low noise and convenience for digital processing and connecting computers.the p aper gives a brief introduction about the measuring principle of the ccd image s ensor and its application status in industrial measurements.some difficulties an d limitations existing in its application are analysed and the trend of its appl ication is pointed out.

cdd图像传感器以其光谱响应宽、动态范围大、灵敏度和几何精度高、噪声低、便于进行数字化处理和与计算机连接等优点，在工业测控中得到广泛应用。该文简要介绍了ccd图像传感器的检测原理和它在工业检测中的应用现状，分析了现有ccd检测技术在应用中存在的问题和局限，指出了ccd传感器在工业检测应用中的发展方向。

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