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为适应民机订货的减少,波音将进一步削减B747、B737的生产。生产率减小将导致西雅图地区2500人失业,而B777的开始生产可以补偿这一状况。到1994年11月,B737的产量将从每月10架减至每月8.5架。到1994年2月B747的生产从现在的每月5架减少到每月3架,到1995年1月将进一步减少到每月2架。这一削减没有考虑可能的新订货,包括沙特阿拉伯航空公司有意购买的B747/ 相似文献
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《中国民用航空》2000,(5)
CathyPatifiCtoEXpandItSA3301A340FleetZOOO年5月9日,香港国泰航空公司确认订购了4架A33O-3O0,客机将于20OI年下半年交付。此外,该航空公司还将租赁另外3架A33O和1架A34O-300。随着此次飞机引进计划的落实,国泰航空公司运营的A33O/34O系列客机总数在2001年底将达到37架,其中包括22架A330和15架一A34O。国泰航空公司的双发A330广泛地运营在其亚太地区航线网上,而其四发A340则运营在欧洲和北美洲的超远程航线上。由于这两种机型具有同样的驾驶舱布局、运营程序和操作特点,国泰航空公司将其作为同一机队运营,由同一组… 相似文献
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《中国民用航空》1998,(12)
受亚洲经济危机影响波音公司宣布调整生产速度并预测财务状况张心宏波音公司12月初宣布,基于对亚洲经济危机及其对航空客运和飞机客户影响的最新评估,其某些民机机型的生产速度将有所放慢。据现在安排,B747的生产将由目前每月3.5架,到1999年后期减为每月2架。随后,如果市场情况个见好转,将在2000年初减为每月1架。据最近的客户需求预测,在2000年初,B757将从每月5架减为4架,B767从每周4架减为3.5架。B777规定为在1999对第四季度由每月生产7架减至5架,预计到2000年仍将以比较低的速度进行生产。B737新一代机型仍如以前宣布的,到… 相似文献
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近日,美国捷蓝航空公司签订35架空客A321确认订单,使得A320系列飞机的全球订单总数突破了10000架。美国捷蓝航空也将成为首家从空客美国亚拉巴马州莫比尔总装线接收飞机的航空公司。 相似文献
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《Air & Space Europe》2000,2(2):49-54
One of the key characteristics of space transportation in the next decade will be the diversity of the missions required, demanding increased flexibility in terms of launch services. This requirement will be apparent in all three market segments: geostationary satellites, constellations and scientific/governmental applications. To meet this new demand, the space transportation operators are seeking to establish a range of launchers. 相似文献
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傅间莲 《西安航空技术高等专科学校学报》2002,20(3):39-40,49
产生式系统是人工智能(Artificial Intelligence)系统最常见的一种结构,因此分析产生式系统的组成部分及其建立问题是一个很基本的问题,而本文就如何描述产生式系统给出一般的方法。 相似文献
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Empirical mass-loss rates were derived for 28 luminous O stars from radio fluxes and H equivalent widths. Comparison with theoretical values predicted by the theory of radiatively driven winds reveals a discrepancy of 0.30±0.05 dex, with the theoretical values being too low. We show that there is not only a mass-loss discrepancy but also a momentum flux discrepancy. The theoretically predicted momentum fluxes are too low by 0.17±0.04 dex. This discrepancy is independent of the adopted stellar mass. We demonstrate that the momentum discrepancy in the most luminous O stars is comparable to the one found in the least extreme Wolf-Rayet stars. We suggest that the physical reason for the break-down of the theory in Wolf-Rayet stars and the most luminous O stars may be related. 相似文献
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秦桧是中国历史上臭名昭著的大奸臣.史书中关于他的记载很多.其中“秦门三状元”的说法更是广为流传。如宋人李心传的《建炎以来朝野杂记》、陈鹄的《耆老续闻》、渚人顾炎武的《日知录》及今人梁羽生的《笔花六记》等书均载秦桧、秦熺 (桧之子)、秦埙(桧之孙)皆为状元.其实这一说法有违史实。事实是秦桧为二甲赐进士出身.秦熺、秦埙均为一甲进士及第. 相似文献
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This summer is Planning a family can partieipate in the tour? With love or family friend with nature for an in-depth exchanges presumably to each other before the feelings of the communication can play a good role.If you can take his family out to sea 《航空港》2011,(9):41-42
这个夏天,有没有筹划一次全家人都可以参与的旅行呢?带着爱人或者家里的小朋友与大自然进行一次深入的交流,想必对于彼此之前感情的沟通能起到不错的作用。如果可以,带着全家去出海吧! 相似文献
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R. E. Wilson 《Space Science Reviews》1989,49(3-4):235-243
Progress in determining rotation rates of Algol primary stars from light curves is assessed. Included are elementary ideas on why the new method works, how to carry out solutions, and how and when to apply the constraint on rotational lobe filling. Some comments are made on desirable improvements for measuring rotation from line broadening. A few remarks are made about the problem of identifying likely fast rotating Algols. 相似文献
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R. E. Wilson 《Space Science Reviews》1989,50(1-2):235-243
Progress in determining rotation rates of Algol primary stars from light curves is assessed. Included are elementary ideas on why the new method works, how to carry out solutions, and how and when to apply the constraint on rotational lobe filling. Some comments are made on desirable improvements for measuring rotation from line broadening. A few remarks are made about the problem of identifying likely fast rotating Algols. 相似文献
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《Air & Space Europe》2000,2(1):53-60
In 1990, the Space Department of the Defence Evaluation and Research Agency (DERA) initiated the Space Technology Research Vehicle (STRV) programme. The aim was to design, build, test and launch a relatively low-cost satellite weighing only 50kg and carrying a variety of experimental payloads derived primarily from MoD-sponsored research within the Department. What is the status of this programme 10 years later? 相似文献