排序方式: 共有8条查询结果,搜索用时 140 毫秒
1
1.
中程空空导弹的参数处于激烈、大范围的时变中,采用古典控制器很难满足不同高度弹道的性能规范。为了使导弹在飞行高度和速度大范围变化时均能保持优良性能,采用数字自适应控制方法是合适的。本文提出了一种基于超稳定性理论的飞行控制系统方案,其性能明显优于不采用自适应控制器的古典系统。 相似文献
2.
3.
檀传文 《长沙航空职业技术学院学报》2002,2(2):45-47,51
在当前形势下,加快培育核心竞争力,是航修企业面临的一项十分紧迫的任务,从分析企业核心竞争力的基本特征入手,论述了航修企业培植核心竞争力的方法、措施和应当遵循的基本原则. 相似文献
4.
陈文辉 《长沙航空职业技术学院学报》2002,2(2):42-44
二十一世纪,是网络的世纪,网络已经成为人们日常生活的工具,了解网络的成长过程和它的发展方向,是进行网络知识学习的基石,也为进一步研究网络知识打下基础.本文对网络基础知识和发展动向做简单介绍. 相似文献
5.
M. Casolino P. Picozza On behalf of the PAMELA collaboration 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》2008,41(12):2064-2070
PAMELA is a satellite borne experiment designed to study with great accuracy cosmic rays of galactic, solar, and trapped nature in a wide energy range (protons: 80 MeV–700 GeV, electrons 50 MeV–400 GeV). Main objective is the study of the antimatter component: antiprotons (80 MeV–190 GeV), positrons (50 MeV–270 GeV) and search for antimatter (with a precision of the order of 10−8). The experiment, housed on board the Russian Resurs-DK1 satellite, was launched on June, 15th 2006 in a 350 × 600 km orbit with an inclination of 70°. The detector consists of a permanent magnet spectrometer core to provide rigidity and charge sign information, a Time-of-Flight system for velocity and charge information, a silicon–tungsten calorimeter and a neutron detector for lepton/hadron identification. An anticounter system is used off-line to reject false triggers coming from the satellite. In self-trigger mode the calorimeter, the neutron detector and a shower tail catcher are capable of an independent measure of the lepton (e+ + e−) component up to 2 TeV. In this work we focus on the first months of operations of the experiment during the commissioning phase. 相似文献
6.
7.
陈勇 《长沙航空职业技术学院学报》2002,2(1):33-37
概括总结废品率计算的几种规律现象,从废品率计算规律的实际问题得出工艺能力系数计算的严谨概念,用此方法指导工程技术人员和操作者重新调正工艺系统,从而避免生产实际中的大量废品的出现. 相似文献
8.
M. Casolino P. Picozza On Behalf of the PAMELA collaboration 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》2008,41(12):2043-2049
PAMELA is a multi-purpose apparatus composed of a series of scintillator counters arranged at the extremities of a permanent magnet spectrometer to provide charge, time-of-flight and rigidity information. Lepton/hadron identification is performed by a silicon–tungsten calorimeter and a Neutron detector placed at the bottom of the device. An Anticounter system is used offline to reject false triggers coming from the satellite. The device was put into orbit on June 15th 2006 in a pressurized container on board the Russian Resurs-DK1 satellite. The satellite is flying along a high inclination (70°), low Earth orbit (350–600 km), allowing to perform measurements in different points and conditions of the geomagnetosphere. PAMELA main goal is a precise measurement of the antimatter ( 80 MeV–190 GeV, e+ 50 MeV–270 GeV) and matter (p 80–700 GeV, e− 50 MeV–400 GeV) component of the galactic cosmic rays. In this paper we focus on the capabilites of observations of heliospheric cosmic rays: trapped and semi-trapped particles in the proton and electron belts, solar particle events, Jovian electrons will be studied in the three years of expected mission. 相似文献
1