查询词典 frame of reference

In chapter 4, dynamic behaviors of a cantilever beam in a non-inertial reference frame are investigated, and the differences of the dynamic property between the zero-order model and the proposed coupling model are revealed.

第四章研究了非惯性系下柔性梁的动力学性态。

For system simulation, this thesis puts forward several improvements in realization, such as state estimating on a non-inertial reference frame, choosing different sets of motion model for different sensors, improving data association by use of feedback fusion result, using multi-model during temporal registration.

例如将目标状态滤波选择在非惯性坐标系下；针对不同传感器建立不同的目标运动模型集；利用多传感器融合处理后的信息反馈到单传感器来改善数据关联效果；在多传感器融合的时间配准过程中，对目标状态估计采用多模型方法。

Central-force Motion, Dynamics of a System of Particles, Dynamics of Rigid Body, Coupled Oscillations, Nonlinear Oscillations, Motion in a Noninertial Reference Frame, Continuous Systems.

力学 (0，3)/应用力学（0，3）中心力下的运动、多粒子系统动力学、刚体动力学、耦合振动、非线性振动、非惯性参考座标系中的运动、连续系统。

Matrices, Vector and Vector Calculus, Newtonian Mechanics-single Particle, Oscillations, Nonlinear Oscillations and Chaos, Gravitation, Some Methods in the Calculus of Variations, Hamilton's Principles Lagrangian and Hamiltonian Dynamics, Central-Force Motion, Dynamics of a System of Particles, Motion in a Noninertia Reference Frame, Dynamics of Rigid Body.

矩阵和向量的计算、单一质点的牛顿力学、线性与非线性的振动运动、重力、微积分上的变分法介绍、哈密顿原理、拉氏及哈氏力学、连心力下的运动、质点系的运动力学、在非惯性坐标中的运动、刚体的运动。

Phenomena such as precession the slow roughly 25 000 year cycle of movement of the direction of the Earth's axis and nutation the continual "nodding" of the Earth's axis due mainly to tidal forces from the Sun and Moon all have to be taken into account when defining a Universal Reference frame.

现象，如进动，慢，大约25 000年的周期，对地球的轴的方向运动，章动，不断"点头"地球的轴心，这主要是由于来自太阳和月亮，所有潮汐力量要考虑到当定义一个通用参考框架。

This paper takes one low-speed-circumgyrate rocket with a empennage asa research object, set up a relevant reference frame, analyse the strength andmoment on the amended rocket, ratiocinate the sports equation with 6 DOF; analyse the factors which cause terminal windage between pratical trajectoryand fiducial trajectory, take certain rocket for example, make use of theemluator on the influence of estimating precision caused by measuredinformation, find the speed, the trajectory obliquity, the trajectory setoverand the coordinate are the sensitive factor arosing terminal windage of thetrajectory; introduce the developing status of detecting technique, and basedon the actuality, choose the radar in the ground as measure equipment; simplydesign and analyse the setting and inflame control of the impulse engine onthe amended rocket; design the amend method and validate its feasibility takingthe use of emluator.

本文以某型低速旋转尾翼火箭弹为研究对象，建立了相应的坐标系，详细的分析了作用在弹道修正弹上的力和力矩，由动量定理和动量矩定理推导出了在一般形式下的弹道修正弹的空间六自由度的运动方程；对引起弹道落点偏差的因素进行了分析，以某口径火箭弹为例仿真了可测信息量对估算精度的影响，发现速度大小、弹道倾角、弹道偏角和位置坐标是引起落点偏差的主要因素；对弹道探测技术发展现状作综合性阐述，并基于现状，选用地面火控雷达作为测量装置；对弹道修正弹上脉冲推力器的安装和点火控制方法进行了简要的设计与分析；设计了弹道修正弹指令修正的修正方法，通过数字仿真验证了方法的可行性。

The definitions of the relative derivatives of a tensor with respect to time in any reference frame by using the notation of vectrix were proposed.

提出了用矢阵表示的张量对时间的相对导数的概念。

In the western mining areas, when from adjustment to restriction adjustment, the original national control points are of low grade, or the points are destroyed and the surface movement is out of shape. thus, there are few control points and the reference frame conversion is a big problem in the western high elevation areas. As a result, this thesis makes a reparable design in accordance with the key problems of holing through survey.

本文就利用GPS技术测设地面近井点的网形布设、观测方法、数据处理作了相应阐述；并对由无约束平差到约束平差时，西部地区可能遇到在矿区分布的原有国家控制点往往只有低等级点，或点位遭破坏、地表移动变形等可能使可用控制点很少的情况、以及西部高海拔地区坐标系统变换问题，提出了针对贯通测量的关键问题应对方案。

Here we frame clear future policies and impetus principles, explain the major area of future projects, and draw up and propose the examination method and procedure. Research results may guarantee the rigorousness and the economic efficiency for driving the projects which are not approved in the future. This study could also provide MOTC and local governments a reference to set up the order of priority for driving railroad grade separation projects.

本研究研提铁路立体化计画未来之推动政策，研析铁路立体化施政之主轴区域与推动原则，研提计画之审查与推动程序，并初步拟定申请审核作业要点供参，若参照办理应可确保未核定铁路立体化计画未来推动之严谨度与经济效益，可供交通部及各县市推动各项轨道建设计画优先顺序之参据。

In the image layer to the adaptive control approach, through the introduction of quantization step size factor - encoding bits output mapping table to identify each frame image quantization step size factor of the reference value.

在图像层采用后向自适应控制的方法，通过引入量化步长因子—编码输出比特数映射表，确定每帧图像量化步长因子的基准值。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。