K8飞机非加压供氧系统研究

介绍Ｋ８飞机在１３．１ｋｍ高度上使用加压供氧系统的理论计算与试验结果。通过理论计算与试验结论，证明在升限１３．１ｋｍ高度上配备非加压供氧系统是完全可行的。     

MATLAB在调压铸造系统智能控制仿真中的应用

ＭＡＴＬＡＢ是一种面向科学与工程计算的高级语言，应用ＭＡＴＬＡＢ进行控制系统的计算机辅助设计快捷方便。本文在介绍了ＭＡＴＬＡＢ对模糊控制系统进行分析与仿真的基础上，以一调压铸造智能控制系统为例，详细叙述了其应用原理与过程，并给出了仿真结果。实践证明，ＭＡＴＬＡＢ是研究和分析控制系统的一个有效手段。     

Windows环境下自动编程系统的研究

本文在分析了国内外有关自动编程系统的研究情况之后提出了基于Ｗｉｎｄｏｗｓ环境下的自动编程系统的设计构想和模块流程，并与其它自动编程操作了对比指出了各自的优缺点。     

D406A钢板成形分析及防止拉深缺陷的对策

针对D406A钢板成形时容易产生开裂、起皱等缺陷的原因进行分析,选择优化的拉深工艺方案,软化处理拉深坯料,增加适当的热处理工序,正确选择和涂覆润滑剂,拉深过程中及时研磨模具工作面等。经验证,预防措施可保证拉深成形的合格率,拉伸件的质量稳定可靠。     

夸克磁共振及磁共振治癌

主要提出了以下学术观点：①粒子世界中并不存在强相互作用，夸克休系是自由旋着的夸克在电磁－弱相互作用下产生的进动维系稳定的；②物质的质量源于夸克的质量，夸克的质量又源于它的自旋。自旋转速不同，能量不同，质量就不同；③用高能粒子碰撞分离出自由夸克很难，但用夸克磁共振（ＱＭＲ）分离出自由夸克却很容易；④利用纵向驰豫时间的差别，使ＱＭＲ仅在肿瘤组织内分离出自由夸克，就可在治癌的同时，不伤及正常组织，从而为     

粉末高温合金盘件等温成形过程PID控制

对FGH96合金涡轮盘件等温锻造过程的控制进行了设计与仿真.采用PID控制,通过迭代学习算法,在SIMULINK下实现了PID控制仿真.应用于实际生产控制时,将对微观不可控参数的控制转化为对宏观可控参数的控制,并根据成形过程的不同阶段特征调整控制量,提高了生产效率和锻件质量.     

条码技术在飞机制造中的应用研究

条码自动识别技术是以计算机、光电技术和通信技术的发展为基础的一项综合科学技术,是信息数据自动识别、输入的重要方法和手段.经过多年的研究与应用,包括条码打印机、扫描器、远程数据采集器、各类耗材在内的条码硬件技术已经日趋成熟.条码是由一组规则排列的条、空及其对应字符组成的识别标记,由条码符号和对应字符（包括数字、字母及特殊或专用字符集等）组成,用以表示一定的信息.     

NOVEL RADAR SIGNAL SORTING METHOD BASED ON GEOMETRIC COVERING

With the increase of complexity of electromagnetic environment and continuous appearance of advanced system radars, signals received by radar reconnaissance receivers become even more intensive and complex. There- fore, traditional radar sorting methods based on neural network algorithms and support vector machine （SVM） cannot process them effectively. Aiming at solving this problem, a novel radar signal sorting method based on the cloud model theory and the geometric covering algorithm is proposed. By applying the geometric covering algo- rithm to divide input signals into different covering domains based on their distribution characteristics, the method can overcome a typical problem that it is easy for traditional sorting algorithms to fall into the local extrema due to the use of complex nonlinear equation to describe input signals. The method uses the cloud model to describe the membership degree between signals to be sorted and their covering domains, thus it avoids the disadvantage that traditional sorting methods based on hard clustering cannot deinterleave the signal samples with overlapped param- eters. Experimental results show that the presented method can effectively sort advanced system radar signals with overlapped parameters in complex electromagnetic environment.     

The characteristics of the semi-diurnal tides in mesosphere/low-thermosphere (MLT) during 2002 at Wuhan (30.6°N, 114.4°E) – using canonical correlation analysis technique

In this paper, we use canonical correlation analysis (CCA) method to investigate the semi-diurnal tidal winds in mesosphere and low thermosphere (MLT) region, observed by a newly installed meteor radar at Wuhan (30.6°N, 114.4°E), during the year 2002. In general, 4(3) effective semi-diurnal tidal pairs of patterns are obtained, which represent ∼2/3 total variances of the origin data set. These patterns are expected to be corresponding to the atmospheric oscillations within the semi-diurnal frequency band excited or modulated by different sources, i.e., the seasonal variations, the modulations by the planetary wave oscillations or the solar 27-day activity. Among all the patterns, the 1st pattern, which represents ∼1/3 of total variances, is the most notable. Its amplitudes show maximum values in spring and autumn, and the vertical wavelengths are longer in summer and shorter in winter, which is in line with the results obtained from traditional harmonic analysis. The vertical wavelengths of the higher order patterns (∼50 km) suggest the classic semi-tidal mode S(2, 4)/S(2, 5) is dominant.     

A320系列飞机大气数据系统的维护

大气数据系统是飞机重要的机载系统。本文结合系统原理、工程技术资料和自身维护经验,对A320系列飞机大气数据系统日常维护中的一些常见故障和特殊故障进行分析,给出维护建议,并对系统维护中的注意事项进行提示与强调。