轨道曲线

The construction precision control point of chord surveying method for ballastless track ballast bed is introduced, including design of control system, layout of chord point, rational range of circle distance, control point of laying track and chord surveying.

介绍了无碴轨道道床竖曲线弦测法施工精度控制要点，即控制体系的设计，弦线点的设置，矢矩的合格范围以及轨排铺设和弦线量测的控制要点。

One important feature ofHamiltonian systems is that it has energy(its energic function is Hamiltonian func-tion),then,its solutions on 2-dimensional plane are some contour lines,the points onstable manifold emanating from hyperbolic equilibrium point have the same energyas that on unstable manifold,then,one can guess that they form a closed curve,i.e.homoclinic orbits under certain conditions,and the contour lines in the innerpart of homoclinic orbit are periodic orbits.

哈氏系统的一个重要特征是它有能量存在(以Hamiltonian函数作为它的能量)，那么在二维平面上，它的解表现为一些等值线，从双曲平衡点发出的稳定流形和不稳定流形上的点具有相同的能量，那么可以猜测，在一定条件下它们构成一条封闭的曲线，即同宿轨，而且其内部的等值线都是周期轨道。

In addition, the trajectories of oil droplets entering the hydrocyclone were computed by using the Particle Obit model. Thereby the separation efficiency of the hydrocyclone can be obtained.

另外，本文用颗粒轨道模型计算了进入水力旋流器的油滴颗粒运动轨迹，在此基础上，得出了水力旋流器的分离效率曲线。

Due to the dragging force, trajectories of spacecraft circling planetoid can departure from the standard taper curve orbit which is obtained by the two-body hypothesis.

绕小行星运行的航天器由于受到摄动力的影响，运行轨迹会偏离二体假设下的圆锥曲线轨道。

The mechanism of the reaction was studiedin detail,in which excited state avaliable to carryout the excited state intramolecular proton transferreaction was recognized.The INDO/S-CI semiempiricalMO method was used to calculate transition energiesand oscillator strength,and assign spectra theore-tically,the calculated spectra values were basicallyconsistent with the experimental values.Themolecular orbital properties for the adjacent HOMO-LUMO of various kinds of conformersand anion species,thetransition properties and symmetry for thetransition from ground state to lower excited stateswere analysed,especially,no much study on theanion species all of the world.

位能曲线的求法满足反应坐标是反应过程中能量最小途径的定义，较详细地研究了各类反应的质子转移历程，认定在哪个激发态有利于发生激发态分子内质子转移反应，用INDO/S-CI半经验MO方法进行跃迁能和振子强度计算及光谱的理论指认，计算的光谱值和实验值基本吻合，并分析了各种异构体和阴离子的HOMO-LUMO附近的轨道性质，各跃迁态的跃迁性质和对称性，尤其是对阴离子的研究国内外尚不多见。

More cars, more tracks, weapons, car decals, more drifty handling and a kinder learning curve...

更多的汽车，多轨道，武器，汽车贴花，更可轻松进行漂移的处理和亲切的学习曲线。。。

This track beam is a complicated and twisted spatial box beam, its section is declined in order to satisfy the vehicle clearance, the track installation and the reburied member of rail bear.

为了满足车辆限界和轨道安装及承轨台预埋件的要求，连续曲梁截面斜置，构成复杂的空间扭转曲线箱梁。

It will decrease when the pointing angle increases,and vice versa.By giving a pixel size of 20 μm for a detector,an orbit altitude of 600 km and a beam deflexion angle low than 30° for the imaging spectrometer, the effective focal length of the telescope was calculated(400,470 or 435 mm),and the relation curves between the relative ratios of ground resolution and the beam deflexions were presented.

给定成像光谱仪探测器像元尺寸为20 μm，飞行轨道高度为600 km，光线摆角≤30°，以星下点、最大摆角和整个运动补偿段地面分辨率中值为30 m为依据来计算望远系统的焦距，求得望远系统焦距为400、470、435 mm，并给出了此时的地面分辨率相对比值与光线摆角的关系曲线。

According to the actual requirements of the curve realignment after the existing railway speed increasing,the traditional theory of involutes is abandoned and the coordinate measurement is used to directly realign curves.

在保证拨正前后轨道长度保持不变的前提下，利用切曲差的关系表达式，自动计算半径和缓和曲线长度，并通过算例验证算法的可行性。

The computer simulation shall use a length of track consisting of two straights with a curve in between.

计算机模拟应在有两个直道组成的曲线的轨道长度下运用。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷