查询词典 spaceflight

AFDX is applied in aviation and spaceflight field more abroad with its unique advantage, but because of its communication model, It can't satisfy the requirement of divinable and low latency of the real-time mission, The research of real-time of AFDX has became a important task, To improve the real-time of the network, the most doable method is to adopt the priority management model. This paper analyzes the issue of packet transmission with different priority; gives the average queue time and stay time of packets with different priority under two queue models and gives the computer simulation.

航空电子全双工交换式以太网以其独有的优势在航空航天等领域的应用不断扩展，但是由于通信模式，无法满足实时任务的可预测性和低延迟等要求，因此，研究AFDX的实时性成为一个重要的课题，为了提高网络的实时性最可行的措施就是采取优先级管理模式，对具有优先级的分组传输问题进行了分析，给出了两种优先级排队模型下，不同优先级分组的平均排队等待时间和平均逗留时间，并进行了计算机仿真。

The international advanced technology and imported parts make"Xin Neng Xin"ultrasonic cleaning equipment hold increasing market share for many years,and it is widly used in the industries such as solar energy silicon chip,semi-conduct silicon chip,potical lens,aeronautical,spaceflight,electonic,mechanical,galvanization,pharmacy,chemical fiber,auto,horological,hardware and new materials.

国际化的先进技术及进口元器件使&鑫能信&牌超声清洗设备，多年来市场占有率稳步增长，广泛应用于太阳能硅片、半导体硅片、光学镜片、航空、航天、电子、机械、电镀、制药、化纤、汽车、钟表、五金及新材料等行业，并迅速崛立于汽车售后服务市场，成为行业先导，深受用户好评。

Based on the spaceflight technology innovation program of"Research on the Testing Method of Reliability----Research on the Fault Diagnostic Expert System and Neural Network"and the Pre-Research Defense Projects of"Research on longevous service and high reliability of Satellites"of the National tenth-five-year plan, taking attitude control system of a satellite as object, the theories and the applications of the neural networks and expert system in the fault diagnosis are studied in this dissertation.

本文以航天技术创新基金项目&可靠性试验方法研究——故障诊断的专家系统神经网络技术研究&和国家武器装备&十五&预研项目&卫星长寿命高可靠性技术&为背景，以卫星姿态控制系统为研究对象，在理论和实践两个方面对神经网络和专家系统相结合的故障诊断技术及其在卫星中的应用进行了研究。

W ith Astronau t John Young piloting the 75- ton Colum bia w ith a stick and peda lm anually like agiant glider, the shuttle came to a halt on a dry lakebed on the desert air base after a 54 - hour spaceflight in which it circled the Earth 36 times.

宇航员约翰·扬像操纵一架巨型滑翔本论文由英语论文网 www.51lunwen.org 整理提供机似地通过一根驾驶操纵杆和一个脚踏板靠手工操纵这艘重达75吨的哥伦比亚号降落在这里一个干涸的湖底上。

These changes appear to be processive in spaceflight.

骨质量的变化并非在骨骼内平均分布，而是有部位特异性，承重骨比非承重骨受影响更为严重。

Pulse detonation engine is a new concept of propulsive engine which uses high temperature and pressure gas produced by intermittent or pulsant detonation wave to generate thrust. PDE has many desirable advantages, including high thermal dynamic cycle efficiency, low specific fuel consumption, high thrust/weight and specific impulse, simple configuration, and will become propulsive device of aviation and spaceflight aerocraft in 21st century.

脉冲爆震发动机是一种利用间歇式或脉冲式爆震波产生的高温、高压燃气来产生推力的新概念发动机，这种发动机具有循环热效率高、燃料消耗率低、推重比高、比冲大、结构简单等优点，将成为21世纪新型的航空航天飞行器的动力装置。

Radially oriented ring magnets with high uniformity have been widely used in aviation and spaceflight.

高性能、高均匀性辐射取向环形磁体在航空、航天、航海的导航系统和控制系统中有重要的应用[1，2]。

This technigue can standardize and adjust high precision instruments and equipmants for military, spaceflight and research organization, and provide technical supports for special application of magnetic spece.

该技术可为军事、航天、科研领域的高精度测磁仪器或装置进行标定、调试，也可为特定磁环境应用空间提供有效技术支持。

Sponge outgassing in vacuum at the ambient temperature and the temperature on teated according to spaceflight industry standard and test equipment is measured.

利用航天工业行业标准及测试设备对一定真空度条件下的聚胺脂网状泡沫在常温及加温两种不同工况时的出气情况进行测试；对两者的放气量进行比较；对放气机理进行分析探讨。

These chronological lists include all crewed spaceflights that reached an altitude of at least 100 km (the FAI definition of spaceflight), or were launched with that intention but failed.

这些按年份排列的列表包括了所有达到海拔100公里（国际航空协会对航空的定义），或者以此为目标但失败了的载人航空。

This matter overthrew all basises I learned from Sunday school .

这件事把我从周日学校学到的所有道理都颠覆了。

It's one of the cruel ironies of aging: if you want to remember your favorite restaurants, the less you should eat at them.

这是一个老化的残酷讽刺：如果你想记住你最喜欢的餐馆，你应该更少吃到它们。