最佳的CAD／CAM工具──CATIA

最佳的ＣＡＤ／ＣＡＭ工具──ＣＡＴＩＡＣＡＴＩＡ是由法国ＤＡＳＳＡＵＬＴＳＹＳＴＥＭＳ公司设计开发，并由ＩＢＭ在世界各地销售的计算机ＣＡＤ／ＩＣＡＭ系统。新的ＣＡＴＩＡ版本中不仅给用户提供了详细的解决方案，而且具有先进的开放性、集成性及灵活性。其主要...     

复合材料板壳结构铺层设计与工程应用

提出了以层压板分层为基本单位，用满应变设计导层板厚度，以应变能原理调整分层比例的二级优化策略，给出了复合材料板壳结构铺层设计的方法，将其编入ＣＯＭＰＡＳＳ３．０版本中。工程应用表明，该方法实用可靠，设计效率高，优化设计软件ＣＯＭＰＡＳＳ为工程技术人员提供了有效的设计手段。     

发展CAD／CAM CIMS技术的思路

从生产管理和技术管理的角度，论述了ＣＡＤ／ＣＡＭＣＩＭＳ技术的重要性，分析了现状和存在的问题，提出了发展思路．     

生产方式的革命--成飞CIMS工程的实践和认识

成都飞机工业（集团）有限责任公司是国家８６３／ＣＩＭＳ典型应用工厂之一，通过实施ＣＩＭＳ工程，不断促进技术和管理创新，提高了航空产品制造和管理水平，促进了公司与国际接轨，增强了国际竞争能力。本文介绍成飞持续推进ＣＩＭＳ工程实施的情况，产生的效益以及对实施ＣＩＭＳ工程的认识和体会     

SFCAGS的车间控制和计划策略

ＳＦＣＡＧＳ是用于单件小批量机加车间管理与控制软件经济快速开发的自动生成系统。本文介绍了ＳＦＣＡＧＳ中针对单件小批量的机械加工车间的特点所采取的控制策略和计划策略，它既考虑了企业的先行运行习惯，又有一定的先进性。     

企业档案管理与CIMS工程

文件档案信息集成管理是ＣＩＭＳ工程的一个部分。本文论述了成都飞机工业集团文件档案管理纳入ＣＩＭＳ工程需要解决的几个技术问题，提出了多种档案介质、计算机网络管理的模式，为公司计算机集成制造系统建设提供了参考。     

机械零件图纸管理系统的设计与实现

本文介绍了基于ＯＲＡＣＬＥ关系数据库的叉车机械零件图纸管理系统ＭＤＭＳ（ＭａｃｈｉｎｅＤｒａｗｉｎｇＭａｎａｇｅｍｅｎｔＳｙｓｔｅｍ）该系统是一个集图纸的图形管理和图号（文本数据）管理为一体的图文数据库系统，该系统建立了与ＡＵＴＯＣＡＤ连接的接口，实现了在ＯＲＡＣＬＥ环境下显示ＡＵＴＯＣＡＤ图形的功能。     

SOFTWARE SERVO COURSE(ATTITUDE) SYSTEMS

ＳＯＦＴＷＡＲＥＳＥＲＶＯＣＯＵＲＳＥ（ＡＴＴＩＴＵＤＥ）ＳＹＳＴＥＭＳＺｈａｎｇＸｕｅｆｕ（ＨｕｎａｎＲａｄｉｏａｎｄＴＶＵｎｉｖｅｒｓｉｔｙ，Ｃｈａｎｇｓｈａ，Ｈｕｎａｎ，Ｃｈｉｎａ，４１０００４）ＳＯＦＴＷＡＲＥＳＥＲＶＯＣＯＵＲＳＥ（ＡＴＴＩ...     

CALS—国际热点技术的进展

本刊１９９３年第７期刊载的“ＣＡＬＳ－国际热点技术”一文介绍了ＣＡＬＳ的有关情况，一年来，ＣＡＬＳ又取得了令人注目的进展，本文概述了ＣＡＬＳ的最新进展并且评估了ＣＡＬＳ对各方面所产生的影响。     

FATIGUE CRACK CLOSURE MEASUREMENT OF 2024-T3 SHEET SPECIMEN

ＦＡＴＩＧＵＥＣＲＡＣＫＣＬＯＳＵＲＥＭＥＡＳＵＲＥＭＥＮＴＯＦ２０２４－Ｔ３ＳＨＥＥＴＳＰＥＣＩＭＥＮＷｕＹｉｓｈｅｎｇ（ＩｎｓｔｉｌｕｔｅｏｆＭｅｃｈａｎｉｃｓ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ，Ｂｅｉｊｉｎｇ，Ｃｈｉｎａ，１００...     

飞机构型管理研究与应用

构型管理是复杂飞机研制过程的必然趋势,是对全生命周期的产品数据的管理。由于因设计、制造、工装的原因以及用户需求的变化,设计更改频繁等特点导致了飞机产品数据管理难度的增加,通过对构型管理研究和应用,实施流程再造、版本管理,保证版本的可跟踪性,实现各构型项的标识、控制、纪实和审核。     

An anticipative adaptive array for frequency-hopping communications

To fully utilize the theoretical processing gain achievable when an adaptive array and frequency hopping are combined, frequency compensation is required. Improved versions of an anticipative adaptive array are examined that provide efficient compensation by adapting the complex weights at each antenna element to the appropriate values for a carrier frequency before that frequency is received. The underlying adaptive algorithm used is the maximum algorithm. Computer simulation results are used to compare the different versions of anticipative processing. These results show that an appropriate version ensures the rapid convergence of weights to values that provide wideband nulling of the interference and noise     

Some tasks of observational gamma-ray astronomy in the energy range 5–400 GeV

Brief discussion of the necessity to carry out gamma-ray observations in the uninvestigated energy range 5–400 GeV by instrument on the board of space vehicle is given. One of the possible versions of such gamma-telescope is described and some estimations of the possible statistics are made.     

Signal Reconstruction from the Output Phases and Magnitudes of Two-Dimensional Filters

Algorithms are presented for reconstruction of a two-dimensional complex signal by knowing the phases and magnitudes of different filtered versions of the signal for a special class of filters. The algorithms have simple geometric interpretation and are easily extended to N-dimensional systems.     

Application of Decision Theory to the Testing of Large Systems

A methodology for determining priorities in allocating test resources among the various subsystems within a large system is described. The methodology is based on concepts from applied decision theory. Two versions of the methodology are presented: a complete version, called the extensive form, and an approximate version, called the diminutive form.     

文化差异对英文翻译的影响——《红楼梦》两个英译本的对比

主要从翻译与文化之间关系的角度出发,对《红楼梦》的两个英译本选取部分例子进行对比,分析在词义选定、亲属称谓、宗教文化等方面所折射出的文化差异以及传递出的不同文化信息,并且指出文化差异对翻译造成的影响,以及译者在翻译过程中所采取的不同处理方法。     

Algorithm of calculating the light airplane flight performance and rational design airscrew parameters at the preliminary design stage

A technique is proposed of calculating the characteristic flight velocities for an airplane with taking into account the nominal performance of a piston engine. We consider an algorithm of design calculation for the airscrew blade geometry (twist angle, chord and optimal angle of attack along blade). Feasible rational versions of design parameters are discussed.     

Compact antennas for UWB applications

A report on an investigation of spherical, disc, and half-disc antennas in the frequency and time domains with the objective of developing small planar versions of the antennas. These antennas have an omni-directional impulse response in azimuth and pulse duration of 0.5-0.65 nanoseconds. In addition, the measured data show a reasonable peak received signal in a pulse communication link using two identical antennas.     

Studies of GTE reverse jets distribution

This work presents the results of the model studies of the reverse jet distribution limits in the air cross-flow, performed in the wind tunnel, as well as the conditions of the jet ingestion into the engine air intakes, located under the wing at the pylons. Structural versions are determined for the travelling cascades, the use of which excludes ingestion of reverse jets into the input of engines.