查询词典 two body problem

Based on the fundamental theory of celestial mechanics and the discussion of two body problem under the action of universal gravitation ,the general model which can be continuously used to calculate the apparent place of celestial body in the solar system was derived. Then ,for the specific celestial body ,the material simulating method and the precision verification was given ,and the reason why the error was caused was analyzed and the corresponding method was offered .

摘 要：基于天体力学的基本理论和对万有引力作用下二体问题的讨论，推导出太阳系天体视位置长期计算的一般模型，然后针对特定天体给出了具体的仿真方法和计算结果的精度检验，深入分析了误差的产生原因并提出了相应的改进办法。

Although Einstein did "derive" the perihelion of Mercury, Gullstrand [10] pointed out in his report to the Nobel Committee that Einstein's field equation may not be able to produce a solution for a two-body problem.

虽然爱氏"推导"了水星近日点的移动，Gullstrand在给诺贝尔委员会的报告中指出，爱氏的场方程可能没有二体问题的解。

The mathematical models of the delay of the GPS signal in the circumstance are put forward respectively. The computation of orbital arc of the two satellite constellations is based on two body problem and perturbations models. An algorithm based on the IRI model and thin layer model is used to simulate the ionospheric delay of the GPS signal. The error models of observation, multipath, relativity and antenna phase center bias are also researched. Under the consideration of the autocorrelation of the electronical measurements, the autoregressive model of time series is introduced into the noise models.

在信号仿真中，研究了利用二体运动和摄动法计算LEO卫星至GPS卫星星座的几何距离的问题；在信号的误差模型中，研究了电离层时延的IRI2001模型和单层投影模型；讨论了观测误差、多径效应、相对论效应和天线相位中心偏移的误差模型；结合电子测量噪声的具有自相关特性的经验，研究了观测误差的AR模型；结合实测数据分析，讨论了接收机钟差和卫星钟差的误差建模问题。

Following the analytic tradition of logical and language methods, this paper examine the mind-body problem in two key aspects: one is related to the implication of the G del incompleteness theorem to mind-body problem, which refuted the argument proposed by H.

遵循语言与逻辑分析的分析传统，我们着重从两方面讨论心身问题：一是围绕G del不完全性定理，二是认知逻辑尤其是有关认识论算术与机器是否有私有性的论题。

Specifically, there are three kinds:(1) constant variation method to track two-body problem the root number of variables to establish perturbed equation;(2) coordinate perturbation method in order to track objects in real position and the location of an intermediate orbit perturbation differential equation as a variable to establish;(3) transformation theory, through a series of canonical transformation to reduce the order of the equations of motion to make it a more simple form.

具体做法有三种：（1）常数变异法，以二体问题轨道根数为变量建立摄动方程；（2）坐标摄动法，以天体在实际轨道上的位置与某一中间轨道上的位置差作为变量建立摄动方程；（3）变换理论，通过一系列正则变换，降低运动方程的阶数，使其具有更简单的形式。

Key words: celestial navigation ;apparent place ;celestial body in solar system; two body problem

关 键 词：天文导航系统；视位置；太阳系天体；二体问题

First, according to the hypothesis of two body problem, a series of formula are deduced for analyzing the efforts causing by every restrict conditions and sketchy windows, which are about 2-3 days every month. Then, utilizing the precise orbit model, the precise windows are computed, which are only ~everal minutes.

首先借助于二体假设建立了简单解析公式，分析各种约束对窗口选择的影响，给出了粗窗口，每月有2-3天；然后，利用精确的探测器轨道动力学模型，计算精窗口，每天为数分钟。

Time Si Weiqi Baoertejiweici (talk at the beginning of L.von Bortkiewicz) this century turn after two article introductions of body problem give English the reader, value turns to what produce the price body problem becomes theory of foreign Marxism economy to study problem of medium a heat stage by stage.

英国曼彻斯特大学教授斯梯德曼1977年出版的《斯拉法以后的马克思》，更触发了一场马克思主义劳动价值理论的大讨论，用生产中投入的其他要素来解释价值的各种理论也应运而生。

In this paper a Nonlinear Variable Dimension Estimator is proposed for tracking maneuvering spacecraft. Two process models were incorporated by the Unscented Kalman Filter to account for the dynamic uncertainties of the target of interest: a nonmaneuvering model based on the two body problem and a maneuvering model taking the forced acceleration as the unknown system input to be estimated.

当飞行器处于无机动的巡航状态时，无色卡尔曼滤波器使用常规的二体问题模型描述其运动规律，而当飞行器被认为开始机动后，滤波器将扩展系统的状态空间，将机动加速度作为状态变量进行估计，从而增加了模型的适应性。

Based on the ISC earthquake catalogue data, according to the orbit equations of two-body-problem and the perturbation theory of celestial mechanics, we could determine the projection pole of the sun, and thus calculate the zenith distance from the sun to the epicenter. After calculating all the earthquakes on their zenith distances, we could get the distribution of the solar zenith distance versus the occurring probability of earthquakes.

基于ISC地震记录，利用天体动力学中二体问题的轨道方程和摄动理论，确定发震时刻太阳在地面的投影点位置，并进一步计算出太阳相对震中的地心天顶距，将地震按天顶距的大小进行统计，得到地震的太阳天顶距地震频度分布。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。