圆弧

词组短语

arc of a circle · circular arc

与圆弧相关的网络例句 [注：此内容来源于网络，仅供参考]

Basing on the Graf′s addition theorem, two expessions, interior and exterior expression, are deduced and the suitable problems for them are discussed. It has been found that the interior expression is the main point for sovling the scattering problem of circular inclusion in half-space. It also has been found that the exterior expression is the key for the scattering problem of circular arc canyon and circular arc alluvial valley, and is one of the main points for scattering problem of circular arc hill as well.

从Graf原有加法公式出发，本文给出了其内域型和外域型两种表达形式并讨论了这两种表达的适用范围，同时指出：内域型表达是求解半空间内含夹塞区出平面散射问题的要点，而外域型表达是解决任意圆弧型凹陷地形和任意圆弧型沉积盆地出平面散射问题中求解难点的关键，同时也是克服任意圆弧型凸起地形出平面散射问题求解困难的要点之一。

We present k -Degree T-Bezier basis function and reparametrize it on the interval [0,1],representation of ellipse and cardioid and G~1 condition of T-Bezier curves based on the analysisof T-Bezier basis function and terminal properties. The results have definite geometric meanings that are useful for surface modeling.(3) We presents G~1 of C-B-spline curves and C-Bezier curves.

3给出了C-曲线间的G~1拼接条件，利用C-Bézier曲线能够精确表示半圆弧和半椭圆弧的性质，在实际应用过程中需要精确表示半圆弧和半椭圆弧的地方利用C-Bézier曲线来代替C-B样条曲线，从而较好的解决了在C-B样条造型系统中无法精确表示圆弧的问题。

The combined motion of grinding the transition arc maintains that the gyration center of the arc moves along the parallel line to the surface of the grinding wheel, and the gyration center of the oxide tool moves along the vertical line to the surface of the grinding wheel.

磨削刀片过渡圆弧时，过渡圆弧的回转中心到砂轮面的距离必须恒等于过渡圆弧的半径，磨削过渡圆弧的复合运动要保持过渡圆弧的回转中心沿平行于砂轮面的直线运动；刀片的回转中心沿垂直于砂轮面的直线运动。

The resulting arc spline is shape|preserving, and has the same number of inflections with the original polyline;(2) The segment number of circular arcs is the same as that of data points.

这种算法具有以下 3个特点：(1)生成的圆弧样条曲线具有保形的特点；(2 )圆弧样条中圆弧的段数与型值点个数相同；(3)圆弧段之间的连接点不一定在插值的型值点上，这样就能用更多的自由度来控制拟合曲线的形状。

In order to overcome shortcomings that the circular arc and ellipse could not be accurately represented by CE-Bézier curves, this method used the continuity condition of CE-Bézier curves and C-Bézier curves to resolve the representation of circular arc and ellipse in CE-Bézier curve modeling.

该方法首先构造了一种具有优良形状可调性和更好逼近性的带3个形状参数α，β，γ的三次扩展Bézier曲线(CE-Bézier曲线)；并针对CE-Bézier曲线无法精确表示圆弧和椭圆弧等二次曲线的缺点，利用CE-Bézier曲线与C-Bézier曲线间的拼接技术，解决了CE-Bézier曲线造型中圆弧和椭圆弧的表示问题。

The main results can beexpressed as follows:(1)Based on πtheory, some affected factors about wave forces are given, and therelation between affected factors and wave forces is analysised by experimentalresults.(2) The distribution of wave press at representative time and reflection nature aregiven and their variety charactes are discussed by experimental results.(3)By comparing the wave forces of quarter-circular breakwater and semi-circularbreakwater under the same wave conditions,some approximately wave forcesexpressions of quarter-circular breakwater are given.(4)Based on VOF method to trace water free surface,solve numerical value ofRANS equation,and get the distributions of flow field and wave press ofquarter-circular breakwater at the same time during one period,the mechanism ofwave force is also discussed elementarily.(5) Based on the result that RANS equation of numerical simulation agree wellwith experimental results,a new approach to study hydraulic natures of quarter-circular breakwater is provided.

其主要结论如下：一、通过π定理，确定影响波浪力的无因次参变量，根据试验结果对其影响因素进行分析；二、基于模型试验，给出典型时刻圆弧面防波堤的同步波压分布和反射特性，讨论它们的变化特点；三、通过相同条件下圆弧面防波堤与半圆型防波堤两种堤型试验波浪力的比较，给出了圆弧面防波堤波浪力的近似方法；四、利用VOF法追踪自由水面，数值求解RANS方程，得到圆弧堤堤体周围的流场和压力场，初步分析了速度涡流与压力场的相互影响；五、对比数值分析与试验结果，探讨数值方法研究圆弧面防波堤水力特性的可行性，提供新的研究途径

The technical characteristics of the invention is that: the rotor end face tooth profile contains four, five or six sections of tooth curves with the circular nature; when it has five sections, addendum circular arcs and dedendum circles are added to the addendum or the dedendum of the rotor; when it has six sections, both the addendum circular arcs and the dedendum circles are added to the addendum and the dedendum of the rotor at the same time, to form four different combination schemes; there are common tangents at the connection points of the two adjacent teeth forming curves, which has a smooth tooth-profile without cusp, a high-wearing feature, a long life of the rotor, a small leakage triangle, and a good sealing property.

本发明的技术特征是：转子端面齿型是包含四段、五段或六段圆弧性质的齿曲线；当为五段时，在转子的齿顶或齿根加上齿顶圆弧或齿根圆弧，当为六段时，在转子的齿顶和齿根同时加上齿顶圆弧和齿根圆弧，形成四种不同的齿型组合方案；相邻的两组成齿曲线的连接点处具有公切线，齿型光滑，没有尖点，耐磨性好，转子的使用寿命长，泄漏三角形小，密封性好。

In this dissertation, first, based on theory of cutting tooth about the gleason spiral bevel gear, the equation of meshing in the process of cutting tooth, the surface equation of generating gear as well as the general tooth surface equation of the double circular arc spiral bevel gear, using GB12759-1991 type of double circular arc gear as a basic gear profile, a three-dimension solid model of double circular arc spiral bevel gear which has the good adaptability was carried out by used of Unigraphics software;Second, by researching of the algorithm about contact and collision as well as various contact types based upon Contacting Finite Element Method, a foundation was laid for selecting the contact type in analyzing contact stress of double circular arc spiral bevel gearing;Finally, through the connection port of PARASOLID between UG software and ANSYS/LS-DYNA software, the three-dimension solid model of double circular arc spiral bevel gearing obtained above in UG was imported into ANSYS/LS-DYNA, a finite element analyzing about contact stress of double circular arc spiral bevel gearing was carried out by applying new loading method.

本文首先基于格利森弧齿锥齿轮加工原理及切齿啮合过程中的啮合方程、产形轮齿面方程以及双圆弧弧齿锥齿轮的齿面方程，选用GB12759-1991型双圆弧齿轮基本齿廓为基准齿形，利用Unigraphics软件的建模功能，绘制了有较好适应性的双圆弧弧齿锥齿轮传动三维实体模型。其次，描述了应用有限单元法进行实体接触与碰撞问题算法的公式，研究了有限元分析中的各种接触类型以及双圆弧弧齿锥齿轮接触应力分析中所选择接触类型的依据。最后，通过UG软件和ANSYS/LS-DYNA之间的PARASOLID接口工具包，将UG软件中得到的啮合齿轮模型导入ANSYS/LS-DYNA有限元分析软件，给出一种新的加载方法，进行了双圆弧弧齿锥齿轮传动的接触应力的有限元分析。

After extraction of the arc region from regions, the seed for an arc is obtained. By traversals for the graph, the seed arc grows by constrains for the same circle.

圆弧及圆的识别先从邻接图顶点中抽取圆弧域，作为种子圆弧，然后从此出发遍历图，按照同圆来建立路径，进行整弧和整圆增长，最终获得圆弧和圆的几何表达。

In practice, the offset curve usually is approximated by lower degree rational polynomial cur ve in order to have the unified expression of data structure and geometric algor ithm in the commercial modeling systems.

通过用双圆弧逼近表示 NURBS( non- uniform rational B- spline)曲线及其 offset，并利用双圆弧逼近的特有性质，把 offset的双圆弧逼近转化为原曲线的双圆弧逼近，简化了问题的求解。

与圆弧相关的网络解释 [注：此内容来源于网络，仅供参考]

Create Arc Tangent：绘制切圆弧

7.3.6 三点绘制圆弧--Create Arc 3 Points | 7.3.7 绘制切圆弧--Create Arc Tangent | 7.4 绘制标准矩形--Create Rectangle

circular arc：圆弧=>円弧

circular aperture 圆孔 | circular arc 圆弧=>円弧 | circular arc profile 圆弧叶型

circular arc profile：圆弧叶型

1192. circular arc 圆弧 | 1193. circular arc profile 圆弧叶型 | 1194. circular brick (改进型气冷堆)圆形砖

circular arc camber：圆弧曲面

circular adsorption chromatogram | 圆形吸附色谱 | circular arc camber | 圆弧曲面 | circular arc profile | 圆弧叶型

circular arc camber：圆弧曲度

circular arc 圆弧 | circular arc camber 圆弧曲度 | circular beam 圆形梁

great circle distance：大圆弧距离

大圆弧航线 great-circle course | 大圆弧距离 great-circle distance | 大圆弧飞行 great-circle flying

ellipse：椭圆弧

云线(revcloud)用来做标记(不重要)样条曲线(SPL)全称:(pline)椭圆(EL)全称(ellipse)椭圆弧(ellipse)不常用. 用来画椭圆弧点(P)全称(point)

great circle route：大圆弧航路

大圆弧飞行 great-circle flying | 大圆弧航路 great-circle route | 格雷屈喷嘴 Greatrex nozzle

round-segment multifocal：圆弧多焦距[眼镜]

round-segment fused bifocal construction 圆弧熔接双焦距结构 | round-segment multifocal 圆弧多焦距[眼镜] | round-trip gain 往返增益

QUA：圆弧或圆的象限点

CEN 圆弧、圆心的圆心 | QUA 圆弧或圆的象限点 | TAN 圆弧或圆的限象点