扇形的

In this paper, the research object is the XM18 spherical generator, in order to improve the dynamic behavior of the machine tool, the following aspects have been studied in this thesis: Firstly, based on the elasticity theory and finite element analysis theory, the finite element models of the lathe bed, dovetail, dovetail shelf, headstock, fanlike plank and millhead shelf, which were the main parts of the spherical generator, were built up using ANSYS9.0. And based on the modal analysis theory and FEM technology, the free modal and the constrained modal analysis of the main parts were studied. Accordance to the analytical results, put forword methods to optimize the key parts.

本课题以XM18球面铣磨机为研究对象，为了提高其动态特性，本文主要从以下几个方面进行研究：首先，根据弹性力学理论和有限元分析的基本理论，利用ANSYS9.0软件建立了铣磨机的主要零部件床身、燕尾、燕尾座、主轴箱、扇形板和磨头座的有限元模型，利用有限元法对主要零部件进行了自由模态和约束模态分析，并根据分析结果对关键部件提出了改进方案。

Any of several Old World birds of the family Upupidae, especially Upupa epops, having distinctively patterned plumage, a fanlike crest, and a slender, downward-curving bill.

戴胜一种东半球戴胜科鸟类，尤指戴胜鸟，有特别的带花纹的羽毛，扇形羽冠，和狭长下弯的喙

Seed scales closely overlapping, often reniform, trapeziform, or flabellate, woody, base narrowed, deciduous at maturity.

重叠的接近的种鳞，通常，梯形，扇形，木质的或，基部狭窄，成熟时落叶。

Leaves ascending on upper side of branchlets, pectinately arranged in 2 lateral sets on lower side, dark green and bright adaxially, oblanceolate-linear, flattened, 1-2.3 cm × 2-2.5 mm, stomatal lines in 2 white bands abaxially, resin canals 2, median, apex obtuse or emarginate. Seed cones dark purple or blue-black, oblong or cylindric-ovoid, ca. 7 × 3.5-4 cm. Seed scales flabellate-trapeziform, 1.6-2 × 1.6-2.2 cm, base stalked.

在小枝的上面边上上升的叶，侧在2安排的pectinately 确定在下部边，正面深绿色和鲜艳，倒披针形线形，扁平，1-2.3厘米×2-2.5毫米，球果深紫色或蓝色黑色，长圆形或者卵形体，约 7 * 3.5-4 厘米种鳞扇形梯形， 1.6-2 * 1.6-2.2 厘米，基部柄。

This type of snowflake, called a sectored plate, forms when the temperate dips below about 5 degrees Fahrenheit (-15 degrees Celsius).

这种雪花的形式叫做盘状扇形，温度在低于负15摄氏度定型。以前是路过的，现在是过路的。。。

In this paper numerical simulation on the mechanical expanding process of line pipe is made by means of elastic-plastic FEM analysis software-MARC. The influence of sectorial angle on deformation characters is especially analyzed, and some useful results are gained.

本文运用大变形弹塑性有限元分析软件MARC，对管线钢管机械扩径过程进行了数值模拟，著重分析了扩径模具的扇形角对扩径过程的影响，得到了一些有益的结论。

The flow zone starts from the mid plateau, goes clockwise around the Eastern Himalayan Syntaxis, and ends at the southeast corner of the plateau with a fan-like front, which implies that the flow zone could be attributed to the escape of highly plastic upper crust material driven by gravitational buoyancy and lateral compression.

这一流滑带的前缘速度场在青藏高原东南角呈现出典型的扇形发散特征，表明整个流滑带可能起因于高塑性上地壳物质在挤压和重力共同作用下的连续性侧向逃逸。

Enhancing this item further is the attractive decorative scalloped rim which encircles the fire bowl.

这个项目的进一步提高是有吸引力的装饰扇形边缘的围火碗。

The area bounded by a chord and the arc of a curve subtended by the chord.

弓形，扇形由弦正对的弦和弧线的弧所成的区域。

The front composed of a shaped oval plaque with a circular cluster centre to scrolling ribbons and fan terminals suspended from a series of arched links intersected by five panels of similar design set throughout with circular-cut diamonds enhanced with baguette-cut accents.

正面是由许多圆形组成的一块椭圆形金属片，两侧为卷曲的缎带与扇形末端，悬挂自一系列拱形链环，间隔5个类似设计的部分，每一部分镶嵌圆形切割钻石，配以长方形切割钻石作为强调。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。