参考系

MRF approach was applied to investigate the flow characteristics around a high-speed ICE train travelling on south Yashiro bridge in Japan under cross wind,based on three dimensional incompressible Reynolds-averaged Navier-Stokes equations,combined with RNG k-ε turbulence model.

采用3维定常不可压缩雷诺平均N-S方程，结合RNGk-ε湍流模型，利用多重参考系法，对横向风作用下ICE高速列车在日本屋代南桥上运行的绕流进行分析。

We study the driving bit error caused processes of synchronization-desynchronization -synchronization recovery, and predict the boundaries of desynchronization area and avalanche effect size based on the quantities of the largest absolute Lyapunov exponent, the largest comoving Lyapunov exponent, and the corresponding commoving velocity.

我们用最大绝对李雅普诺夫指数和随移李雅普诺夫指数以及随移参考系的移动速度三个量从理论上预言了去同步区域的边界和雪崩效应的大小。

The characters of these linear models are described and relations of them are deduced.

阐述和推导了不同参考系下线性模型的特点和它们之间的变换关系。

It is very importantly significant not only for the whole and local movement of the earth but also for the national economy and defense development.

地球参考系对于研究地球的整体和局部运动，对国家的经济和国防建设都具有重要的意义。

The second-order post-Newtonian(2PX) equations of light ray have to be discussed under the recent extension of the DSX scheme which was founded in early 1990 s to discuss a complete first-order post-Newtonian celestial mechanics for N arbitrarily composed and shaped, rotating deformable bodies.

近来相继提出一系列的空间天体测量计划，要求考虑在多参考系中二阶后牛顿部分对光线传播的贡献，也就是说，必须讨论在最近完成的扩展的DSX体系下的二阶后牛顿(2PN)光线方程。

The dipmeter features small size,light weight,high precision,it can be widely used in building,machinery,roads,bridges and geological exploration and so on,such as gravity reference system to measure the inclination.

该倾角测量仪具有体积小、重量轻、精度高的特性，可广泛应用于建筑、机械、道路、桥梁和地质勘探等重力参考系下测量倾角的场合。

FCRP was established to break through the "red-brick walls" of the ITRS by creating options to extend CMOS to its ultimate limits.

FCRP的设立是为了打破&红砖墙&的地面基准参考系的建立选项延长的CMOS其最终限制。

Mechanical models and differential equations of motion for high speed pantographs;2. By the principle, differential equations of motion for variable-mass nonholonomic systems constrained to the fixed axis rotation are obtained.

建立了变质量力学系统在定轴转动参考系中的Jourdain原理，由此得到了受定轴转动约束的变质量力学系统运动微分方程，给出了准坐标形式，最后举例说明方程的应用。

Instead of describing the structure of this c.s., we just ignored its existence.

我们必须有一些所谓参考系，这是用来决定物体的位置的力学框架。

Plates of globular cluster M3, taken with the 40cm refractor at Sheshan station of Shanghai Astronomical Observatory, are used by this work. The difference of epoch of these plates is up to 81years. The positions and absolute proper motions of 24 stars in ACT catalogue, which links with the Hipparcos Catalogue based on the International Celestial Reference System, are used as the reference frame. Using the central overlapping principle, the absolute proper motions of 534 stars in the region of about 100'×100' around the cluster are determined. After the membership determination of the stars which based on the data of proper motions, average absolute proper motion components for the cluster of -0.3±0.3 mas/yr in R.A.

本文使用上海天文台佘山40厘米折射望远镜拍摄的14张最长时间跨度为81年的球状星团M3底片的PDS扫描结果，使用与 Hipparcos星表相联系的基于国际大球惯性参考系的ACT星表中的 24颗恒星的位置和绝对自行为参考架，用中心重叠法进行天体测量归算，得到了这个星团中心附近100'×100'天区内534颗恒星的位置和绝对自行，并利用这些自行对成员概率进行了估算，得到这个星团的赤经方向绝对自行为- 0.3±0.3mas/yr，赤纬方向绝对自行为-3.1±0.3mas／yr。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。