查询词典 navigation

And an integrated navigation algorithm based on the dead reckoning system is put forward in this paper. The algorithm makes use of the output of accelerometers and navigation parameters to update the velocity of SINS.

该算法在传统的航位推算算法的基础上，利用惯组中加速度计组合的输出和航位推算给出的位置与姿态完成了惯导速度更新。

On moving base, a new initial alignment algorithm for strapdown inertial navigation system is proposed. In the algorithm, two special inertial frames, the initial-time inertial frame (i0 frame) and the initial-time SINS body inertial frame (ib0 frame), are defined and are selected as calculation reference frames, then, the calculation of initial alignment direction cosine matrix is expanded into three parts:(1) the DCM between i0 frame and the navigation frame will be easily obtained via local geographical coordinates and initial alignment time;(2) attitude updating using gyro samples gets the DCM between SINS frame and ib0 frame;(3) by explaining SINS specific force equation in SINS body frame, the relation between velocity log, accelerometer measurement and gravity acceleration is established to achieve the constant DCM from ib0 frame to i0 frame.

在运载体运动情况下，提出了一种适用于捷联惯导系初始对准的新算法，该算法以惯性空间为参考基准，即建立了初始时刻惯性坐标系（i0系）和初始时刻捷联惯组惯性坐标系（ib0系）两个惯性坐标系，将初始对准姿态矩阵的实现分解为三部分：（1）通过地理位置和初始对准时间求解i0系至导航坐标系的变换矩阵；（2）使用姿态更新算法实时计算捷联惯组相对于ib0系的变换矩阵；（3）通过惯导比力方程变形，获得测速仪辅助测量、加速度计输出和重力加速度之间的关系，从中可以求解出从ib0系至i0系的常值变换矩阵。

The invention of the compass had epochal influence on navigation, opening up a new chapter in the history of world navigation.

指南针的发明，给航海事业带来了划时代的影响，世界航运史也由此翻开了新的一页。

This paper analyzes the concept of navigation economic benefits, establishes the navigation economic benefits index frame based on the characteristics of INEJ, and gives the formula for each benefit in it, which provides reference for decision-making or project evaluation.

本文分析了航运经济效益概念，根据内河航电枢纽工程特点，建立了航运经济效益计算指标体系，并对指标体系中各项效益的计算进行了探讨，提出了量化计算公式，供项目决策或评价时参考。

Geomagnetic navigation is a brand new navigation technology and has very important significance for national defence.

地磁导航作为一种新的无源导航方式，具有重要的国防意义。

In this paper,we introduce the main research content and the basic principle of GAN,the situation and development of the gravity sensor ,digital map processing and matching theory in home and abroad,especially the architecture and the research results of Gradiometer As an External Navigation Aid,Gravity Aided Inertial Navigation System.

本文在进行了一般性辅助导航方法的概述之后，详细介绍了与辅助导航相关的重力场基本概念、重力辅助导航系统的主要研究内容、基本原理；从重力传感器、重力图数据处理及重力图匹配理论与算法三个方面详细介绍了其国内外研究现状，重点介绍了重力梯度仪辅助导航、重力辅助惯性导航和通用重力模块三种系统的体系结构和研究成果；总结了重力辅助导航涉及的关键技术及其发展趋势；最后给出了我国开展海洋重力辅助导航研究的若干建议

Gravity navigaton is based on gravity map. A method of constructing gravity map which can meet the demand of navigation is an important step taking account of the gravimeter and the precision of navigation.

重力导航是基于图的导航，根据导航重力仪和导航精度要求的具体情况，寻求能够保证导航定位精度的重力图构建方法是实现重力导航的重要步骤。

In this papers according to Harmer's Three Elements Theory and the requirements bo teaching in navigation English teaching practice, the author puts forward the feasibility of the cooperative language teaching in classroom teaching practice. By combining with the reality on asmmetry of the knowledge structures of the teachers and students the author also analyzes the advantages of it dining the navigation English study.

本文根据英国英语教学专家Harmer关于成功外语课堂教学的三个基本要素的理论，和航海专业英语教学对教师提出的要求，结合航海专业英语教师知识结构非对称性的问题，以及在进入航海专业英语教学阶段后，学生自身知识结构非对称性的实际，提出了航海专业英语合作式课堂教学法的设想。

Using embedded operating system as its platform, combing Global Positioning System and Geographic Information System, the embedded vehicle navigation system is a hybrid system of software and hardware. It is an ideal solution of navigation, location, geography information query and spatial data management for mobile users.

它是以嵌入式操作系统为平台，全球定位系统(Global Positioning System，GPS)与地理信息系统(Geographic Information System，GIS)相结合的一个软硬件混合的系统，是移动用户导航、定位、地图查询和空间数据管理的一种理想解决方案。

The developments of GPS and integrated navigation technology provide solid basis for low cost IMU and GPS to integrate high performance navigation system.

GPS技术及其与惯导系统组合技术的发展，为低成本IMU和GPS组合成高性能的导航系统提供了坚实的技术基础。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48