查询词典 orbit space

The first is a partially reusable two-stage-to-orbit launcher the second is a fully reusable TSTO vehicle with vertical take-off and horizontal landing for the second stage and the third is a fully reusable aircraft-like single-stage-to-orbit vehicle with horizontal take-off and landing.

首为部分可复用二级环绕( TSTO： Two-Stage-To-Orbit )发动机；次为二级带垂发平降的全复用 TSTO；第三种为类似战机的水平起降全复用的单级环绕发动机。

The theories of multi member function"s extremity value, Hooke Jeeves mode searching method solving wholly complex problem of extremity value and uniformity design method, one new and efficient method to choose test point, are applied to establish the two-dimension oil well orbit optimized model. The shortest length of oil well orbit curve is regarded as this model"s object and all kinds of effecting parameters are analyzed.

通过引入多元函数极值理论、求解复杂极值问题的HookeJeeves模式搜索法及一种较为新颖和高效的试验点选择方法：均匀设计法，建立以最短油井轨迹曲线长为目标的二维油井轨道优化设计模型，并对影响井轨迹曲线的参数进行了较为详细的分析。

In order to calculate the satellite orbit in GPS data process,it is more efficient to use polynomial methods to fit the orbit curve with the parameters of GPS broadcast ephemeris.

利用多项式拟合的方法计算GPS卫星在轨坐标时，使用正交多项式可有效避免计算过程中出现的病态矩阵。

The method using microcomputer to draw the phase graph of autonomous system on plane of ordinarily differential equation is studied,first a large number of data of orbit are obtained by an appropriate method of numerical calculation from known initial condition,then computer draw the curve of orbit on screen by these data.

研究利用微机绘制常微分方程平面自治系统相图的方法，首先用一种合适的数值算法由已知的初始条件得到轨线的大量数据，再利用这些数据在计算机屏幕上画出轨线的图形。

Hydrostatic transmission is widely used in construction machine. The research of one of its hard cores, low speed high torque radial piston motor, is very important. To directly estimate the life of this kind of motor, and to design a orbit curve with the longest life at same condition, this paper gives theoretic research of the equal contact stress inner curve of radial piston motor. The research is divided into four parts:1 Taken all forces the piston endured into consideration when radial piston motor working, the force between roller and orbit is deduced.

静压传动技术在各类工程机械中得到广泛的应用，对作为其核心部件的径向柱塞式低速大扭矩液压马达的研究显得十分重要，为了能直接对这种马达进行寿命估计，并能在相同工况下求得寿命最长的轨道曲线，本文从设计等接触应力内曲线的角度对这类马达作探讨性的研究，主要从以下四个方面进行：(1)综合考虑径向柱塞式液压马达工作时的各种主要受力状况，对柱塞组件进行受力分析，并通过仿真分析影响轨道和滚动体间正压力的各个因素，得到正压力的简化表达式。

The main task is the orbit computation including the orbit determination and prediction.

主要任务是卫星轨道计算包括轨道测定及预估。

And the progress of kinematic orbit determination of low orbit satellites based on GPS and studies related are discussed.

在运动学定轨中，有效的卫星跟踪个数和好的GPS数据质量是很重要的。由于周跳和粗差可以大大的降低最终轨道的精度，因而周跳探测和粗差处理是运动学定轨处理中一项非

In order to provide orbit completion for Chinese lunar explore project, it was founded the lunar satellite orbit determination model and software by us.

为了对中国月球探测工程的提供轨道计算支持，我们研究建立了自己的月球卫星轨道确定模型和软件。

The project of orbit determination in this paper is applied to two study projects. The method of orbit determination and the results achieve the de mands of the projects.

本文的定轨方案在两项预研研究课题中得到了应用，其定轨方法和实际的计算结果达到了课题要求。

The errors and area limits caused by the lunar curvature were avoided in this model established under the Selenocentric Orthogonal Coordinate System, the accidental errors of exterior line elements were reduced by orbit fitting and interpolation, the polynomial orders of systematic errors in satellite orbits were decreased with their expression in the flying coordinate system moving and rotating with satellites, and the reliability of exterior orientation solution was enhanced under the condition of sparse and low accuracy control points by appending constraint of orbit and attitude parameters.

该模型通过在月心直角坐标系进行影像空中三角测量来消除月球曲率引起的误差和测图范围限制，通过轨道形状的拟合与插值来减小摄影时刻轨道位置的偶然误差，在飞行坐标系中建立轨道修正模型来减少定向参数的数目，对轨道和姿态增加约束条件来提高月面控制点数目稀少及精度低条件下外方位解算的精度与可靠性。

Through comparing with the results by simulation to study the effects of theprojectile"s final velocity, the angle of rotation and the ballistic trajectory"s migration withdifferent projectile"s rotating speeds, different target"s moving speeds and differentpenetration angles.

通过比较数值模拟的结果来研究不同弹头转速、目标速度、侵彻角对侵彻过程中弹头最终速度、翻转角度和弹道偏移的影响。

I love stationery and all the accoutrement of writing.

我爱文具以及所有的书写的工具装备。