圆几何

Prominent in the modern elementary geometry of the triangle is the nine-point circle.

九点圆在三角形的现代初等几何中是重要的。

Prom nt in the modern elementary geometry of the triangle is the nine-point circle .

九点圆在三角形的现代初等几何中是重要的。

In the fiber cladding and core, the optical fields are represented by the sum of the Bessel and modified Bessel functions, respectively. In the polymer and metal, the optical fields are written to the sum of the exponential functions.

针对热极化光纤的特点，本论文完成了以下理论分析和实验工作： 1、首次利用圆波导模型和标量近似理论对具有复杂几何结构的极化D型光纤的传输特性进行了理论分析。

The geometrical model of tubule has been formed, and the grid size sensitivity has been performed in FLUENT.

建立了微型圆管的几何模型并进行了网格独立性分析。

The relations between the numbers of measured points and measuring error are found based on least-square method in calculating the geometric paramteters of circle, sphere, plane etc. Furthermore the choice of the number of measured point and their distribution have been recomended instructively.

为了减小偶然误差或消除零件表面形状误差对测量结果的影响，往往多测数点或数十点，本文推导出了使用最小二乘法计算几何参数时，如圆、球、平面等，测量点数与测量误差的关系，对测量点数及测点位置的选择提出了指导性意见。

It has 347 rooms in the palace, after 15 years of the project, completed in 1943. Jodhpur royal family used as a principal residence. Designed by eminent Edwardian architect Henry Lanchester. General Oriental and Western architectural s. Palace were 105 feet high dome ctruction, mining Renaissance . and the furniture is gilded to the internal geometry and aerodynamic characteristics of the art.

皇宫中105英呎高的圆屋顶建筑，采文艺复兴时期风格，内部是镀金的家俱及以几何型及流线型为特色的艺术作品，并挂上自我放逐的波兰艺术家Stefan Norblin的异国风格壁画，来彰显内部装饰。

The knifepoint geometry and cutting edge's blunt round radius are considered as critical parameters to get high quality for the machined surface.

认为正确地选择刀尖部分几何形状和修光刃钝圆半径是获得高质量加工表面的有力保证。

By the aid of a example, the parameters were solved with the tangent line of a circle, the intersection point of tangent and thecoordinates defined by the geometrical relationship of the image based on two propositions proposed in the paper.

借助实例，在文中建立的2个命题的基础上，通过对圆的切线、切线交点及所成像的几何关系确定的的坐标进行参数求解，得到确定模型的二维像和三维像。

Combining with the National Natural Science Foundation ofChina(No.50478032), following researches were done in this thesis: 1 The variation regularity of the ultimate anti-bending capacity of therectangular-sectioned beam with different corrosion has been obtained through thequalitative analysis of 48 beams (32 corroded beams and 12 comparing beams) withaccelerated corrosion; 2 The conclusion has been obtained that the strain of corroded steel bar andconcrete no longer fit in with the assumption of plane section through the analysis ofthe strain data, the strain relation of steel bar and concrete in the mid-span section ofvariously corroded beams at ultimate has been obtained. Through the building of newgeometric relation, the expression of the height of compressive area in the corrodedbeam with rectangular section has been deduced, and the formula with corrosion rateas the main variable for the anti-bending capacity of the corroded concrete beam hasbeen suggested and verified by experiment.; 3 The influence of steel bar corrosion and the concrete regression to the flexureductility coefficient of the corroded structure component has been analyzed. Based onthe relation of steel bar and concrete at yield and ultimate, the expression for theflexure at yield and ultimate of corroded reinforced concrete beam, and the model forthe calculation of the flexure ductility has been built.

本文结合国家自然科学基金项目(50478032)"既有钢筋混凝土桥梁时变可靠度研究"，主要进行了以下研究工作： 1通过对48根快速锈蚀钢筋混凝土矩形截面梁(32根锈蚀梁和12根对比试验梁)数据的定性分析，得到了不同锈蚀率下，锈蚀钢筋混凝土矩形截面梁极限抗弯承载力的变化规律； 2通过对应变数据的分析，论证了锈蚀构件钢筋和混凝土的应变不再符合平截面假定的结论，并通过回归分析得出了不同锈蚀率的螺纹钢筋梁和光圆钢筋梁在极限弯矩作用下，跨中截面处钢筋应变和钢筋处混凝土应变的关系，通过构造新的几何关系，得出了锈蚀钢筋混凝土矩形截面梁计算受压区高度的表达式，既而得出了以锈蚀率为主要变量的锈蚀钢筋混凝土矩形截面梁的正截面抗弯计算建议公式，并通过试验数据加以验证； 3分析了钢筋锈蚀和混凝土劣化对锈蚀构件曲率延性系数的影响，结合钢筋屈服和极限弯矩两种状态下钢筋和混凝土的应变关系，分别得到了锈蚀钢筋混凝土矩形截面梁屈服曲率和极限曲率的计算表达式；既而推导出曲率延性系数的计算模型。

The distance between the reactive sensor node and the target node is estimated by using the value of RSSI, since the strength of radiation signal and the square of distance is inversely proportional. We proposed a method to derive the position of the target node based on the theory of radical center. With data from three reactive nodes, the position of target node can be analytically estimated.

我们以讯号强度指标来推估节点与被追踪物件的距离，并利用圆之根轴的几何特性，提出一个位置的估算方法，可以简单地利用三个感测节点所回传的资讯计算出被追踪物件的位置，所提出的方法即使在距离值有误差的情况下，依然能够估算出被追踪物件的唯一位置。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。