三形

In this paper, the 3D FEM models of cone-tread and worn-tread locomotive and vehicle wheels are firstly established, which come into contact with the rail of standard size. There hasnt been any more refined 3D FEM computation model of wheel/rail up till now. The elastic effect of crosstie and roadbed is also considered.

本文建立了锥形踏面、磨耗形踏面的机车和车辆车轮分别与标准轨道相接触的三维有限元计算模型，模型还考虑了轨枕和部分道床的弹性作用。

The multitooth contact problem of the crown gear coupling is analysed by using 3 D BEM. Actual measurements on a specially designed test bed are made.

本文首先应用三维弹性边界元方法对一鼓形齿联轴器的多齿接触问题进行了数值计算分析，然后在专用试验台架上作了相关实测研究。

Methods Four three-dimensional finite element models were constructed by the data of spiral CT:1Mandibular second premolar restored directly by full crown;2Fill the perforating cavity with resin material and full crown restoration;3Cast nickel chromium alloy post core plus full crown restoration;4Fiber post and resin core plus...

方法采用螺旋式CT扫描获取数据，建立下颌第二前磨牙4种情况下的三维有限元模型：1直接全冠修复；2用树脂材料充填开髓洞形后全冠修复；3铸造镍铬合金桩核与全冠修复；4纤维桩树脂核与全冠修复。

In chapter 1,we find out a kind of two-parameter invariant cubic curve family of a certainquadratic system which is important one for studying the distribution of limit cycles.

第二章讨论一般的二次系统具有三次代数曲线同宿环的充要条件，针对问题，我们采用了具有双曲鞍点的二次系统的标准形，利用仿射坐标变换，我们把系统和曲线同时简化，使问题得到了完满解决。

Feeding patterns of antenna array are researched and feeding network is designed. Three-unit and four-unit models for the cylindrically conformal microstrip antenna array are set up and their directivities are simulated respectively. Through the comparison of the simulation results, the four-unit array is proved to be feasible.

对天线阵列的馈电方式进行了研究，设计了天线阵列的馈电网络，建立了三单元和四单元柱面共形微带天线阵列模型，对方向性分别进行了仿真分析，比较仿真结果，选用了满足工程需要的四单元阵列。

Song Ming is located in Forest Park, Prince Rock Mountain, the relative elevation, and many types of animals and plants, shrubs up to more than 130 kinds, Division of alpine fir, iron Cheng; Center distributed spruce, red Betula, birch, mountain Yang; low distribution of Chinese Pine Mountain, poplar, larch; forest, bright colors, unique shape of the azalea flower, Hydrangea macrophylla, primrose, willow spent nearly a hundred species of wild flowers, etc.; have distributed widely; a large number of Zushima, 3-pin, 9 calamus, Sichuan Chishao, Astragalus, purple Hu, deer, such as with grass.

松鸣岩森林公园地处太子山林区，相对高差大，动植物类繁多，乔灌木多达130多种，高山分部着冷杉、铁桦；中心分布着云杉、红桦、白桦、山杨；低山分布油松、杨树、落叶松；林中花色鲜艳，花形独特的杜鹃、八仙花、报春花、柳叶花等近百种野生花卉；有分布广范；数量较多的祖师麻、三棵针、九节昌蒲、川赤芍、黄芪、紫胡、鹿含草等。

In another field of red,three boys are distracted by the mysterious purple head of a spectacled woman, who may well be a security camera decked out as demoness.

在另一片红色海洋中，三个男孩看着一个与众不同的，戴紫色头巾的神秘女人，有些走神。这个有些妖形怪状的女人可能就是执行暗中摄影监视任务的秘密警察。

Fractal dimension can be used to describe the morphology of tertiary dendrite.

可以用分形维数来描述三次枝晶的形态。

The Cordeliers, with their three enormous adjacent gables; the Augustins, whose graceful spire formed, after the Tour de Nesle, the second denticulation on this side of Paris, starting from the west.

还有三道巨大山墙并列的结绳派修道院，以及奥古斯都教派修道院，其优美多姿的尖塔形如齿状，在巴黎这一边，从西数起，位于纳勒塔之后，算是第二个这种形状的尖塔。

By utilizing the basic theory of chaos and fractal,on the basis of reading a vast amount of literatureand summing up predecessors achievements,using the three methods of analysis,computation andexperiment,this paper research for the overlapping embedment topology distribution structure of thegeneralized M-J sets and chaos phenomenon in the multi-dimension determinate nonlinear system(such as the cardiac system of species of the different level of evolution,the two-dimensional nonlinearmap,etc).

本文利用混沌与分形的基本理论，在大量阅读文献，总结前人的成果的基础上，采用解析、计算和实验三种手段并用，主要研究了广义M-J集的嵌套拓扑分布结构和多维确定性非线性系统(如进化程度不同物种的心脏系统、二维非线性映射等)中的混沌现象，取得了以下方面的创新

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新