八边形

设F8（x）为一个中心在原点、边心距为x的正八边形。

For a regular octagon F_8 ( x ) centred at the origin and with a central distance x from the centre to its sides , the paper has proved the following theorem .

小舍的形状就是一个八边形的一角。

The sectional shape is a quarter of an octagon .

在内半径相同的情况下，圆形螺旋电感最大品质因数Q分别比四边形和八边形增加约0.90和0.80倍；

Compared with those of the quadrilateral and octagonal ones with the same inner radius , the maximum quality factor Q of the circular spiral inductor increases by 0.90 and 0.80 times , respectively ;

这种构件内管为PVC-U管，外管为八边形钢管，同心放置的两管之间为混凝土。

This structure features PVC-U as its inner tube and octagon-shaped steel as its outer tube with concrete sandwiched in between .

给出合理的线圈宽度与间隙宽度，提出了八边形的线圈绕组结构，计算得出PI膜悬臂梁光开关驱动电压与工作距离的关系，并对悬臂梁长度、宽度、厚度进行优化。

We analyzed the winding configuration and chose the regular octagon form and also studied the relationship between the driving voltage and working distance about the PI-cantilever , which aimed at optimizing the structure of the PI-cantilever in length , width and thickness .

视频压缩中基于八边形的快速运动估计算法研究

Fast Motion Estimation Algorithms Based on an Octagon-Grid for Video Coding

教学楼八边形教室的设计

The Design of Octagonal Classrooms in a Teaching Building

八边形中空夹层钢管混凝土偏心受压柱的试验研究

Experimental study of concrete-filled double skin steel tubular columns with octagon section under eccentric loads

八边形有八条边。

An octagon has eight sides .

风电场正八边形扩展基础地基基底反力的计算原理与方法

Principle and method for calculation of reaction of the octagonal spread foundation bed for wind farm

它们有些像桌子上的撞球，桌子不是长方形的，但仍然是多边形，比如说正八边形。

They are related to billiards on tables that are not rectangular but still polygonal , like the regular octagon .

楼下还有一间八边形的小房间，内有筒形穹顶天花板，几面玻璃墙和一条嵌壁式长凳座椅。

Also downstairs , there 's an octagonal den with a barrel-vaulted ceiling , walls of glass and a built-in bench seat .

首先，通过引入辅助椭圆，构造出与实际骨料更加接近的八边形骨料。

First , by introducing an auxiliary ellipse , the octagonal aggregate is constructed , which is closer to the practical aggregate .

基于新的数据处理接口，利用光机集成分析方法对大口径八边形钕玻璃片的支撑系统结构设计参数进行优化。

The support system of large octagonal Nd : glass is optimized with integrated optomechanical analysis method based on the new data processing interface .

当Q>5时，圆形螺旋电感的工作带宽分别比四边形和八边形增大约60%和30%。

And the band width of the circular spiral inductor is about 60 % and 30 % wider , respectively , for Q > 5 .

对8根方形和八边形薄壁钢管混凝土长柱的轴压性能进行了试验研究，柱的长宽比为14～40，管壁板件的宽厚比为67～125。

Experiments have been carried out to 8 long columns of concrete-filled thin-walled steel tube under axial load . Their cross-sections are square or octagon .

正八边形内整点问题圆内开缝八边形自然对流换热的数值分析

On the Number of Lattice Points in a Regular Octagon Numerical Analysis of Natural Convection in a Cylindrical Envelope with an Internal Concentric Slotted Octagon

八边形、四边形及六边形桅杆平均压力系数及脉动压力系数沿桅杆高度方向呈均匀分布，不随桅杆高度的变化而变化。

The Average pressure coefficient and fluctuating pressure coefficient of quadrilateral , hexagon , octagon section meta-synthetic mast distribute homogeneously along height direction of the masts .

结论：经根黄通道八边形游离整块切除胸椎上关节突及骨化黄韧带减压充分、相对安全和简便。

Conclusion : En bloc resection of the superior facet process and ossified ligamentum flavum of thoracic spine via pedicle-flavum octagonal tunnel is safe and reliable .

目的：探讨经根黄通道应用八边形游离整块切除胸椎上关节突及骨化黄韧带法治疗胸椎黄韧带骨化合并脊髓病的疗效。

Objective : To investigate the efficacy of en bloc resection of the superior facet process and ossified ligamentum flavum of thoracic spine via pedicel-flavum tunnel ( PFT ) .

目前国内已有关于八边形中空夹层钢管混凝土短柱轴心受压和偏心受压的力学性能的研究。

At present , researches with regard to the behavior of Octagon-Shaped Concrete-Filled Double Skin Steel Tubular ( OSCFDSST ) under axial compression and under eccentric compression are available at home .

根据统一理论推断，对不同截面形式的钢管混凝土轴压短柱采用有限元方法进行分析，得到了圆形、方形、矩形和八边形截面轴压短柱的平均应力-应变全过程关系曲线。

According to the Unified Theory , the concrete-filled steel tube ( CFST ) columns with different sections subjected to axial compression are analyzed by FEM , whose mean stress-strain curves are also obtained .

1987年新加坡重新设计1元硬币，在正反两面都印上一个八边形，许多人认为这样做能够平息龙魂，让新加坡迎来一个新的经济增长期。同年九月，新设计的1元硬币在国内正式发行。

The 1987 Singapore $ 1 coin was designed with an octagon on both sides , which some believe quelled the dragon spirits and allowed Singapore to embark on a new period of economic growth .

在考察管状机织物细观几何结构的基础上，基于对纤维束截面椭圆外接八边形的假设构建管织物的三维细观模型。

On the basis of the mesoscopic geometrical structure observed tubular woven fabric , and based on the assumption of yarn section oval external octagon , a three-dimensional mesoscopic model of tubular woven fabric is builted .

概述了光学电压传感器的原理与结构类型，并着重计算分析了传感器探头的方形、八边形和圆形晶体分别在平板电极和圆弧电极中的电场分布。

The theory and structure of the optical voltage transducer is introduced in this paper , which focuses on the electric field calculation and analysis of the sensors with different shapes of crystals under flat electrodes and arcual ones respectively .

在最大品质因数频率点，圆形螺旋电感端口反射系数分别比四边形和八边形减小约32.5%和26.6%，金属材料用量分别比四边形和八边形减少约30%和20%；

At the frequency corresponding to the maximum quality factor the reflection coefficient of the circular spiral inductor decreases by about 32.5 % and 26.6 % , respectively , and the masses of metals used decrease by about 30 % and 20 % , respectively ;

平面理性八节点曲边四边形有限元RCQ8

8-Node curve quadrilateral rational finite element