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Results The contour of soft tissue and hard tissue and some typical curves were successfully taken, and 19 cephalometric landmarks were identified,computerized automatic recognition system of cephalometry was set up.

结果:提取了头颅定位侧位片的软组织和硬组织轮廓曲线和图像内部的某些特征曲线,在此基础上确定了19个头影测量标志点,建立了X线头影测量计算机自动识别系统。

This paper describes the importance of using correctly the characteristic curve of the X-ray films in the radiographic detection.

阐述了正确运用X光胶片特性曲线在射线检测中的重要性,研究了X光胶片特性曲线在射线检测过程中曝光参数选取时的实用价值及其相关应用。

In this paper,the B-spline curve is supposed as boundary curves,when they are in two paralled plane and two arbitrary plane,the condition about the control vertex of characteristic polygon when the ruled surface is developable are gained,solved the designing problem of degree and degree B-spline curve .Throughing (2,3) degree and (2,2) degree B-spline ,we haveproved the validity and utility of this method.

本文用两条B样条曲线作边界曲线,当它们位于两平行平面上和两任意平面上时,研究得到了由它们形成的直纹面为可展面时它们的特征多边形顶点满足的条件,解决了(n,n+1)次和次可展B样条曲面的设计问题,然后以(2,3)次和(2,2)次B样条曲面为构造实例,证明了该算法的正确性和实用性。

On the basis of Aumann,Meng Ya-qin and Ye Zheng-lin[13],Cuan-ying and Xue Ji-jun[16] have gained some conditions about characteristic polygon of the ruled surface,they used two Bezier curves in paralled plane as boundary curves to get ruled surface.

国内孟雅琴、叶正麟、爨莹、薛继军等人在Anmann方法的基础上,用位于两平行平面上的两条Bézier曲线作边界曲线,形成直纹面,并得到了它们可展时特征多边形顶点应该满足的条件。

This paper used a method of curvature circle replacing general curve,the authors obtain twouniversal formulas calculating the inherent frequency of relative oscillation in miniamplitude be-tween columns that have general section curve.

本文应用曲率圆弧近似一般曲线的方法,导出了具复杂截面曲线的等截面柱体在另一柱体上微幅摆动时固有频率的一般计算式。

The essay focuses on the relationship between line and circular cone, andmainly discusses 5 most typical problems------the basic chord length formula, t...

直线和圆锥曲线的位置关系是本论文重点部分,从最基本的弦长公式、常见的中点弦问题及直线和圆锥曲线关系中五种最典型问题进行了探究。

In the paper, the math model of the fitting machining benchmark curve of stone slice has been given, which used on the handrail of eddied ladder ,and circular helix has been used to be a fitting curve.

本文给出了旋转扶梯石材贴片的加工基准曲线拟合的数学模型,以空间螺旋线作为拟合曲线,为石材数控线切割机提供了理论基础,解决了石材加工行业中的实际问题。

In order to model complex hair styles, such as curly hairs and wavy hairs, we first construct five types of surfaces and three curves: curved cylinder, curved circular frustum, curved prism, curved edged frustum, curved revolving paraboloid, and curved cylinder helix, curved circular frustum helix and curved revolving paraboloid helix. Then we give the expressions for points and normal vectors on these surfaces, suitable to composition.

为了构造复杂发型,例如卷发发型和波浪发型,我们首先构造了五种曲面和三种曲线:弯曲圆柱面、弯曲圆台面、弯曲棱柱面、弯曲棱台面和弯曲旋转抛物面,以及弯曲圆柱螺线、弯曲圆台螺线和弯曲旋转抛物螺线,并且给出了这些曲线曲面上适合于拼接的点和向量的表示方式。

In this paper we derive the. curve equation of tooth profile on the basis of its meshing principle and discuss the necessity and possibility of replacing the equidistant curve which in the circular section of lang arc external pendulum curve by circular arc.

本文从其啮合原理出发,导出齿廊曲线方程,论述了以圆弧替代长幅外摆线环形部分等距曲线的必要性和可能性,提出圆弧齿形替代要求,运用最优化方法,给出最优设计方案。

This result is visualized and further compared with the results based on line segment and circular curve-line error models.

以三次B样条曲线为例,给出了其建模及可视化结果,进一步地将该结果与折线及圆曲线的情况进行了比较。

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And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时,论述了一体化管理体系构建中的几个主要问题,包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。

If you're huffing and puffing at any point during the run, slow down and make sure you can take deep breathes.

如果你任何时候在跑步过程中气喘如牛,降低速度并且确保你能够深呼吸。