一种航迹规划地形分析的改进算法

巡航弹航迹规划因地形参数不同而直接影响到规划方法与最终所得的航线的优劣，本文提出了巡航弹航迹规划地形分析的一种改进算法，包括由地形图已知点生成德朗利三角网的改进算法和由德朗利三角网找出通视点的改进算法．经仿真实验表明该算法可用性强、速度快，易于在规划作业过程中应用，包括实现部分地形图的变更和动态增加各种火力点等障碍物．     

状态转移问题的数学模型浅析

解决一个问题时往往会发现问题里设置了不少的障碍，如何把各个障碍分离，以免引起不必要的干扰，这是一个关键。这里讨论了如何建立一个问题中状态转移关系的数学模型以及如何寻找最短路径的方法。     

智能交通系统中路径诱导算法研究进展

针对智能交通系统的路径诱导问题，提出了按诱导系统的目标是系统路径或单车路径、所依据的信息性质是静态或动态以及路径生成方式是分散型的还是中心型的三种分类方式.详细讨论了路径诱导算法的实时性、动态路径诱导和交通控制与诱导一体化集成这三个在路径诱导系统研究中的关键问题，并分析了它们最新的研究进展.结合分析结果与路径诱导系统的实际应用前景，给出了基于出行者心理特征模型、多目标优化、路段交通量预测、提供更多智能化服务以及基于分布式人工智能框架模型等进一步研究未来路径诱导算法的重要研究方向.     

Sol-Gel法制备生物玻璃/Ti涂层参数的确定

采用溶胶-凝胶(Sol-Gel)法在已经预涂了一层过渡层的纯钛基体上制备生物玻璃(BG)涂层。试验以正硅酸乙酯(TEOS)、硝酸钙(Ca(NO3)2.4H2O)、氯化镁(MgCl2.6H2O)等为原料,并采用正交试验设计,所得涂层均通过SEM和EDS进行分析,并利用空间几何模型折算绝对偏差,从而确定出最优的试验参数为:[Si]=1 M,水酯比(Rw)=4,pH=4.5,浸涂粘度(η)为3.55 mPa.s。     

广义超立方体网络的容错路由分析

讨论了广义超立方体网络的容错路由问题。并在此基础上证明了当无效点很多时，只要存在某个（n-1）-维广立方体中无效节点不超过两个，则该n-维广义超立方体中的任意两个有效节点x和y之间的有效路由长度区间为[H（x，y），0（x，y）＋4]。这里H（x，y）表示x到y的汉明距离，0（x，y）表示x到y的最优距离。     

一种改进的适用于无线瑞利衰落信道的OFDM时频同步算法

正交频分复用(OFDM)技术已经广泛应用于各种高速宽带无线通信系统中.然而OFDM系统相比单载波系统更易受到频偏和时偏的影响,因此实现系统的时频同步技术是OFDM系统中非常关键的技术.该文介绍和比较了当前用于OFDM系统的多种同步技术,并提出了一种适用于无线瑞利衰落信道的0FDM时频同步算法,该算法利用一个OFDM导频符号可同时实现符号同步和频率同步,极大地提高了符号估计的精度.仿真结果表明,在多径信道下,该算法的性能比传统算法的性能有很大的改善.     

Optimal Routing for Protection and Restoration in an Optical Network

In this paper we provide a centralized method for optimally selecting the set of active and backup paths in an optical transport network in the cases of shared-path restoration and 1:1 protection schemes. We provide novel mixed integer linear programming (MILP) formulations for both the schemes, for a network with full wavelength conversion capability. The given formulations are not restricted to consider single link failures: the concept of fault event is introduced to handle the possibility that multiple links go simultaneously under fault. The optimization objective includes the total capacity requirement plus an additional term related to the active paths reliability. We use a simple decomposition heuristic to support the resolution process. The optimization is solved for various sample scenarios in order to evaluate the resource saving achieved with the shared-path restoration scheme. The impact of different factors such as topology, traffic demand and structure of failures on the resource saving is analyzed. Also, we provide guidelines about handling differentiated levels of protection within the framework of the proposed formulations.     

Parametric investigation of γ-alumina granule preparation via the oil-drop route

Taguchi M₃₂ experimental design was implemented to investigate the effect of operating variables on the structural and textural properties γ-alumina granules produced via the oil-drop route. Aluminum powder and hexamethylenetetramine (HMTA) were used as precursor and gelling agent, respectively. Nitric acid (HNO₃) was tested to dissolve aluminum powder as a novel digestive media. Response surface methodology (RSM) was employed to analyze the results of experimental design. The synthesized samples were characterized, by Thermo-gravimetric analysis (TGA/DTA), X-ray diffraction (XRD), nitrogen physisorption, energy dispersive X-ray (EDX), scanning electron microscopy (SEM), and transmitting electron microscopy (TEM). The output of RSM which is a multivariate linear regression model was examined to find out the effect of each factor on the response, namely the total surface area of γ-alumina granules to reach the optimum conditions. The optimized samples possess superior characteristics, e.g. highest surface area, magnificent sphericity, mesoporous structure, monotonous crystalline network, and broad pore size distribution. Based on the results, the surface area of γ-alumina granules relied too much on the temperature of aging solution, aging time and interactions between the factors. The role of heat treatment on the texture properties and morphology evolution of the samples were also precisely discussed.     

进路式调车方法

重点研究了矿山窄轨铁路监控系统的进路式调车方法．首先从列出系统的进路联锁表来建立继电器逻辑电路的控制方法,然后用线性代数矩阵理论实现计算机软件进路调车方法,建立了铁路信号与电动道岔、敌对进路和进路之间的数学表达式,在推导出进路系数方阵和道岔系数矩阵的基础上,实现矩阵运算,从而达到了优化设计和简化控制程序的目的．     

互联网域间路由系统安全态势评估

基于边界网关协议BGP的互联网域间路由系统缺乏必要的安全机制,面临严重的安全威胁.尽管人们对BGP路由系统的安全问题进行了详尽研究,但是很少量化该系统的安全态势,并且网络管理员也确实需要有用的安全态势信息来感知自治系统(AS)的路由安全状况.为了解决这个问题,分析了互联网域间路由系统的层次特性,提出了一个基于BGP异常路由的安全评估模型.该方法的基本思想是基于BGP路由系统的层次特性构造路由状态树,准确地刻画BGP路由系统中各路由实体之间的层次关系、存储和表达每个实体的路由安全状态;并根据所检测的异常路由计算每个实体的路由安全状态.实验测试表明,该模型能同时评估BGP路由器、自治系统和互联网域间路由系统的安全威胁态势,可为网络管理员提供直观的安全态势曲线.