民航安全管理体系中的风险管理

全面推进民航安全管理体系（SMS）的建设是中国民航当前的重大任务之一。我国民航发展正处在机遇与挑战同在，优势和劣势并存的局面下，如何抓住建设民航SMS这一时机，让它在实施过程中充分发挥其作用，实现体系建设的最终目的，是摆在广大民航企事业单位面前的一个重要任务。风险管理作为SMS的核心要素，是PDCA（策划一实施一检查和测量一持续改进）循环的主要实施环节。通过深入探讨风险管理内涵及在民航SMS构建中的应用，有助于为广大民航企事业单位相关人员在SMS的建立和实施过程中提供积极的建设性的意见，从而更好地推进我国民航SMS的建设，提高广大民航企事业单位的安全管理水平。     

Edge Detection of River in SAR Modulus Maxima and Improved Image Based on Contourlet Mathematical Morphology

To cope with the problems that edge detection operators are liable to make the detected edges too blurry for synthetic aperture radar （SAR） images, an edge detection method for detecting river in SAR images is pro- posed based on eontourlet modulus maxima and improved mathematical morphology. The SAR image is firstly transformed to a contourlet domain. According to the directional information and gradient information of direction- al subband of contourlet transform, the modulus maximum and the improved mathematical morphology are used to detect high frequency and low frequency sub-image edges, respectively. Subsequently, the edges of river in SAR image are obtained after fusing the high frequency sub-image and the low frequency sub image. Experimental re sults demonstrate that the proposed edge detection method can obtain more accurate edge location and reduce false edges, compared with the Canny method, the method based on wavelet and Canny, the method based on contourlet modulus maxima, and the method based on improved （ROEWA）. The obtained river edges are complete and clear.     

利用和开发Windows自带的VPN技术研究

通过实例,介绍了利用现有的Windows系统的功能,实现VPN的方法,对使用纯软件实现VPN、降低企业联网成本有一定的参考价值。     

空军的远程装备

美国空军正期待提高其远距离硬打击力的技术和方法。目前，通过升级现有B-1、B-2和B-52机群的航电——特别是武器弹药——来满足空军的现实需求。中期目标是打算对F-22进行适度改进，设计制造FB-22轰炸机。长期计划可能是开发高超音速飞行器用于远程打击。     

Ground-Based Cloud Using Exponential Entropy/Exponential Gray Entropy and UPSO

Objective and accurate classification model or method of cloud image is a prerequisite for accurate weather monitoring and forecast. Thus safety of aircraft taking off and landing and air flight can be guaranteed. Thresholding is a kind of simple and effective method of cloud classification. It can realize automated ground-based cloud detection and cloudage observation. The existing segmentation methods based on fixed threshold and single threshold cannot achieve good segmentation effect. Thus it is difficult to obtain the accurate result of cloud detection and cloudage observation. In view of the above-mentioned problems, multi-thresholding methods of ground-based cloud based on exponential entropy/exponential gray entropy and uniform searching particle swarm optimization （UPSO） are proposed. Exponential entropy and exponential gray entropy make up for the defects of undefined value and zero value in Shannon entropy. In addition, exponential gray entropy reflects the relative uniformity of gray levels within the cloud cluster and background cluster. Cloud regions and background regions of different gray level ranges can be distinguished more precisely using the multi-thresholding strategy. In order to reduce computational complexity of original exhaustive algorithm for multi-threshold selection, the UPSO algorithm is adopted. It can find the optimal thresholds quickly and accurately. As a result, the real-time processing of segmentation of groundbased cloud image can be realized. The experimental results show that, in comparison with the existing groundbased cloud image segmentation methods and multi-thresholding method based on maximum Shannon entropy, the proposed methods can extract the boundary shape, textures and details feature of cloud more clearly. Therefore, the accuracies of cloudage detection and morphology classification for ground-based cloud are both improved.     

反向需求、广义FME（C）A—FRACAS及系统（产品）可靠性

从产品可靠性定义出发，阐述了反向需求是产品需求完备性的重要内容，也是系统可靠性的要求的重要内容。本文给出了一般系统反向需求设计考虑的主要因素．以及如何收集相关数据建立反向需求库。最后本文通过大量的例子给出了广义FME（C）A—FRACAS与系统可靠性之间的关系。     

Modeling and Algorithm Application of Weapon Assignment System

In order to improve weapon assignment(WA)accuracy in real scenario,an artificial neural network(ANN)model is built to calculate real-time weapon kill probabilities.Considering the WA characteristic,each input representing one assessment index should be normalized properly.Therefore,the modified WA model is oriented from constant value to dynamic computation.Then an improved invasive weed optimization algorithm is applied to solve the WA problem.During search process,local search is used to improve the initial population,and seed reproduction is redefined to guarantee the mutation from multipoint to single point.In addition,the idea of vaccination and immune selection in biology is added into optimization process.Finally,simulation results verify the model′s rationality and effectiveness of the proposed algorithm.     

缝纫泡沫夹心复合材料的制备及力学性能表征

传统的夹芯结构复合材料通常是将面板和芯材粘结在一起,这使得夹芯结构芯材与面板的界面性能薄弱.为了弥补现有夹芯结构材料界面性能薄弱的缺点,研究了缝纫增强泡沫夹芯结构复合材料一体化成型工艺,并对其力学性能进行了试验研究.通过与未缝纫泡沫夹芯结构的对比试验,发现缝纫能显著提高泡沫夹芯结构的弯曲强度、平压强度和侧压强度,而且随着缝纫密度的增加,该夹芯结构的抗弯、平压和侧压性能均有提高.     

商业ERP系统在民航机场的应用研究

本文分析了当前民航机场商业区信息管理的现状和特点，阐述了商业ERP系统在民航机场商业区经营管理的应用模式，并对机场商业区信息管理系统的发展方向进行了初步探讨。     

贵阳机场南远台防雷接地改造方案

雷电对电子电气设备的危害是无法估量的，本文旨在通过对贵阳机场南远台防雷接地系统的改造过程分析，给无线电台（站）的防雷提供参考。