面向创新能力培养的数电混合教学实践

随着FPGA技术的飞速发展,传统的“数字电子技术”教学如何在基础理论和实践能力培养之间找到新的平衡点成为课程教学的关键。结合“数字电子技术”课程特点,通过在教学设计中精心组织教学内容、设计配套演示教具、增强实验教学针对性、课后作业量少次多突出过程评价以及四位一体系统推进,有效提高了教学效果。     

矿井煤仓三维计算机辅助设计

针对传统的矿井煤仓二维设计存在绘图复杂、抽象、易出错等问题,提出了一种矿井煤仓三维计算机辅助设计的方案;以恒源煤矿的-600煤仓和主井缓冲煤仓为例,详细介绍了煤仓三维计算机辅助设计及其动画演示的具体实现。该方案解决了复杂工程施工中设计者与施工人员的交流问题,为高质量、快速施工提供了基础保障。     

广西壮族干栏建筑对现代展示空间设计的应用探究

壮族干栏建筑是一种具有鲜明地方民族特色的民居类型,壮族干栏建筑以其独特的空间规划和结构独树一帜,现代的许多设计案例从中深受其启发,展示设计也不例外。空间规划是展示设计中的重要要素之一,壮族干栏建筑的空间结构形式对于展示空间规划很有启发作用。本文从壮族干栏建筑中的空间规划和结构特点分析,结合现代展示设计对空间的处理中强调空间层次的体验感,进行探讨干栏建筑对展示设计空间规划的可行性启示。     

Learning from demonstration in robots: Experimental comparison of neural architectures

Robots have played an important role in the automation of computer aided manufacturing. The classical robot control implementation involves an expensive key step of model-based programming. An intuitive way to reduce this expensive exercise is to replace programming with machine learning of robot actions from demonstration where a (learner) robot learns an action by observing a demonstrator robot performing the same. To achieve this learning from demonstration (LFD) different machine learning techniques such as Artificial Neural Networks (ANN), Genetic Algorithms, Hidden Markov Models, Support Vector Machines, etc. can be used. This piece of work focuses exclusively on ANNs. Since ANNs have many standard architectural variations divided into two basic computational categories namely the recurrent networks and feed-forward networks, representative networks from each have been selected for study, i.e. Feed Forward Multilayer Perceptron (FF) network for feed-forward networks category and Elman (EL), and Nonlinear Autoregressive Exogenous Model (NARX) networks for the recurrent networks category. The main objective of this work is to identify the most suitable neural architecture for application of LFD in learning different robot actions. The sensor and actuator streams of demonstrated action are used as training data for ANN learning. Consequently, the learning capability is measured by comparing the error between demonstrator and corresponding learner streams. To achieve fairness in comparison three steps have been taken. First, Dynamic Time Warping is used to measure the error between demonstrator and learner streams, which gives resilience against translation in time. Second, comparison statistics are drawn between the best, instead of weight-equal, configurations of competing architectures so that learning capability of any architecture is not forced handicap. Third, each configuration's error is calculated as the average of ten trials of all possible learning sequences with random weight initialization so that the error value is independent of a particular sequence of learning or a particular set of initial weights. Six experiments are conducted to get a performance pattern of each architecture. In each experiment, a total of nine different robot actions were tested. Error statistics thus obtained have shown that NARX architecture is most suitable for this learning problem whereas Elman architecture has shown the worst suitability. Interestingly the computationally lesser MLP gives much lower and slightly higher error statistics compared to the computationally superior Elman and NARX neural architectures, respectively.     

多无人机任务推演系统研究

研究多无人机任务推演系统的设计与实现过程,在多无人机任务推演系统具体需求的基础上,设计系统的分层体系结构与具体功能模块。针对系统实现过程中的多机协同任务分配及航迹规划问题,建立相应的数学模型并使用改进遗传算法对模型进行求解。使用分布式处理技术解决模型解算与实时数据显示的矛盾。基于MapX控件实现系统中战场地图的显示与操作功能。该系统对制定合理作战方案、发挥无人机的最佳作战效能具有重要意义。     

分布式仿真实验管理系统体系结构

针对采用分布式仿真进行体系对抗仿真面临的问题,如数据的一致性、实验资源部署、初始态势加载、仿真运行控制、实验数据回收等,设计分布式仿真实验管理系统体系结构。以满足武器装备论证对仿真实验样本数据需求为目标,辅助武器装备论证人员进行想定编辑、实验设置、实验规划、实验进程监控等,使分布式仿真技术更好地服务于武器装备论证。     

重大工程论证专家选择及其自适应遗传算法

论证专家选择是重大工程可行性论证时的一个复杂决策问题.对此,根据论证专家团队需求构建了论证专家选择模型,并设计了自适应遗传算法进行求解.数值算例验证了所提出的模型和算法的有效性和可行性,可为决策者提供不同准则下的论证专家的最优组合方案.最后对算法进行了分析,给出了解决这类问题的算法控制参数的合理组合范围.     

一种基于主体可信度的联合辩论框架

辩论框架是计算机利用辩论机制来解决实际问题的基础,如商务谈判、法律纠纷和劳动争议等。传统的辩论框架对辩论机制和论证方法作了具体的形式化描述,但忽略了辩论主体及其对辩论结果影响的描述,而且在辩论过程中一个论点通常需要多个论据的联合论证。针对以上问题,在传统辩论框架的基础上,提出了一种基于主体可信度的联合辩论框架(STUAF)。首先引入了辩论主体的概念,并对观点和论据之间的联合论证进行形式化定义;其次给出了完整的框架结构和语义描述,证明了该辩论框架满足Dunk提出的标准辩论框架的基本定理;然后结合辩论树给出了语义计算的算法;最后给出一个具体的应用实例,实例分析表明S I'UAF及其语义算法是有效的。     

网络CAI软件中动画过程的设计与实现

针对网络计算机辅助教学的将点和实际开发过程中积累的经验,提出各动画过程的设计思想,并简要给出陈春实现方法,讨论了用Ｊａｖａ的实现的网络教学系统中的尝试、演示关键功能携炔的具体技术。     

全国节水增效示范项目不同节水模式效果分析

自1996年到2008年底中央已在全国31个省（自治区、直辖市）及新疆生产建设兵团完成了2000个节水灌溉增效示范区建设,对农业节水灌溉持续发展起到了良好的示范作用,根据示范项目的特点,通过调研分析总结了不同节水模式所产生的效益、效果及对灌溉的影响。