以促进新疆经济为导向的校本课程资源开发与功能建构

新疆是少数民族聚居的地区,发展少数民族教育意义重大。除了必要的硬件设施外,我们还需要适应少数民族地区特点的教育模式。开发校本课程,使之与国家课程相得益彰,共同促进少数民族教育的发展进而带动地区经济的发展成为必需。针对新疆这一具有民族特殊性的地方,如何有效的开发校本课程并使之落到实处成为解决问题的关键。     

基于神经网络的地形匹配方法研究

提出了基于神经网络实现多特征融合的地形匹配算法,充分利用地形的各种不同的统计特征和几何特征,构造了一种地形匹配网络模型.通过对实时图和基准图的分析,给出了计算网络节点之间的权值函数,建立了网络系统能量方程,通过求系统的最小能量得到最佳匹配位置.由于网络能融合地形的不同统计特征和几何特征,所以算法大大提高了系统的抗干扰能力和定位精度,适合于实时图容易发生畸变的地形匹配领域.实验结果表明,定位精度和抗干扰能力均优于传统的地形匹配方法.     

一类带配送中心运输问题的容量扩张模型研究

运输问题一般采用表上作业法来解决,考虑一类带配送中心的运输问题,若仍采用表上作业法,会使问题复杂化.文中采用一种构造辅助网络的方法:在运输网络中将每个配送中心均拆分成两个点,连接两点形成新弧,构造出新的网络,并给每条弧赋予参数,将此类运输问题转换为最小费用流模型来解决,可以使问题模型和运算简单化.在此基础上,考虑运输网络中配送中心和边的容量扩张问题.     

卫星军事应用系统作战效能评估的网络层次分析法研究

根据卫星军事应用系统的特点研究了基于网络层次分析法的效能评估方法.确立了效能评价的准则,给出了影响其作战效能的指标集,建立了网络层次分析法控制层和网络层模型,并且利用计算极限超矩阵的方法对单个准则下各方案的作战效能进行排序.最后,通过对单个准则下的排序向量进行加权求和获得卫星军事应用系统作战效能的排序向量.     

Aircraft routing under the risk of detection

The deterministic problem for finding an aircraft's optimal risk trajectory in a threat environment has been formulated. The threat is associated with the risk of aircraft detection by radars or similar sensors. The model considers an aircraft's trajectory in three‐dimensional (3‐D) space and represents the aircraft by a symmetrical ellipsoid with the axis of symmetry directing the trajectory. Analytical and discrete optimization approaches for routing an aircraft with variable radar cross‐section (RCS) subject to a constraint on the trajectory length have been developed. Through techniques of Calculus of Variations, the analytical approach reduces the original risk optimization problem to a vectorial nonlinear differential equation. In the case of a single detecting installation, a solution to this equation is expressed by a quadrature. A network optimization approach reduces the original problem to the Constrained Shortest Path Problem (CSPP) for a 3‐D network. The CSPP has been solved for various ellipsoid shapes and different length constraints in cases with several radars. The impact of ellipsoid shape on the geometry of an optimal trajectory as well as the impact of variable RCS on the performance of a network optimization algorithm have been analyzed and illustrated by several numerical examples. © 2006 Wiley Periodicals, Inc. Naval Research Logistics, 2006     

An efficient and modular modeling for launch dynamics of tubed rockets on a moving launcher

This paper develops a modular modeling and efficient formulation of launch dynamics with marching fire (LDMF) using a mixed formulation of the transfer matrix method for multibody systems (MSTMM) and Newton-Euler formulation. Taking a ground-borne multiple launch rocket systems (MLRS), the focus is on the launching subsystem comprising the rocket, flexible tube, and tube tail. The launching subsystem is treated as a coupled rigid-flexible multibody system, where the rocket and tube tail are treated as rigid bodies while the flexible tube as a beam with large motion. Firstly, the tube and tube tail can be elegantly handled by the MSTMM, a computationally efficient order-N formulation. Then, the equation of motion of the in-bore rocket with relative kinematics w.r.t. the tube using the Newton-Euler method is derived. Finally, the rocket, tube, and tube tail dynamics are coupled, yielding the equation of motion of the launching subsystem that can be regarded as a building block and further integrated with other subsystems. The deduced dynamics equation of the launching subsystem is not limited to ground-borne MLRS but also fits for tanks, self-propelled artilleries, and other air-borne and naval-borne weapons undergoing large motion. Numerical simulation results of LDMF are given and partially verified by the experiment.     

中文分词与命名实体识别的联合学习

将卷积结构引入循环神经网络,从而构建卷积循环神经网络。以此为基础,研究构建了面向中文分词与实体识别联合学习的序列标注模型。该模型依托卷积循环神经网络构建特征编码层,实现中文字序列局部空间特征和长距离时序依赖特征的联合提取;依托改进的循环神经网络构建标签解码层,实现标签序列长距离时序依赖的有效建模;依托统一的分词与实体识别序列标注模式实现分词信息与实体信息的联合学习,避免传统流水线法的误差传播问题。在人民日报语料和微软标注语料上的实验结果显示,该框架较传统统计模型和神经网络模型有显著的性能提升,尤其是在识别字数较多的命名实体时,其效果明显优于其他方法。     

网络信息检索结果的影响因素及应对策略

针对目前出现的“信息过载”问题,分析了网络信息检索结果处理的现状,从信息源、用户行为及检索机制3个方面分析了影响检索结果的因素,对提高检索结果的满意度提出了一些建议。     

基于ISA总线的CAN通讯卡的设计与实现

为实现PC机在控制局域网络 (CAN)中的应用 ,开发设计了一种PC机与CAN的接口———CAN通讯卡。该通讯卡采用微控制器完成底层的CAN通讯任务 ,并利用双口RAM与PC机进行数据交换 ;通过基于Win9x的PC机设备驱动程序实现上层应用程序对通讯卡的操作。该系统结构紧凑、可靠性高 ,已在磁悬浮列车控制系统中得到了成功应用。     

一种基于策略的配置管理思想

对更健壮和更有效配置管理工具的需求已成为企业网络管理领域的一个越来越迫切的问题.针对这种情况,提出了一种新的配置管理思想--基于策略的配置管理,给出了规则冲突的产生和解决策略.减少了因配置信息变化而对网络的重构时间,降低了网络的维护成本,使网络配置更易于进行.