基于Android 平台智能手机的车牌快速识别系统

为提高交警处理突发事件及日常巡查工作的效率,提出了一种基于Android 平台和4G 网络传输的车牌快速识别系统方法。该方法利用4G 网络将移动端拍摄的图片传输到远程服务器,识别车牌号。利用车牌号在违章信息库中查询,并将查询结果实时回传到手机客户端。智能手机作为移动端,利用JAVA 对UI( User Interface) 界面进行布局,实现拍照、显示、信息录入等功能。实验结果表明,该APP 界面简洁,操作方便,系统功能齐全,能有效提升交警处理突发事件及日常巡查工作效率,从而缓解执法过程带来的交通拥堵问题。     

Discrete sliding mode prediction control of uncertain switched systems

The robust stabilization problem for a class of uncertain discrete-time switched systems is presented. A predictive sliding mode control strategy is proposed, and a discrete-time reaching law is improved. By applying a predictive sliding surface and a reference trajectory, combining with the state feedback correction and rolling optimization method in the predictive control strategy, a predictive sliding mode controller is synthesized, which guarantees the asymptotic stability for the closed-loop systems. The designed control strategy has stronger robustness and chattering reduction property to conquer with the system uncertainties. In addition, a unique nonswitched sliding surface is designed. The reason is to avoid the repetitive jump of the trajectories of the state components of the closed-loop system between sliding surfaces because it might cause the possible instability. Finally, a numerical example is given to illustrate the effectiveness of the proposed theory.     

料球粒径对立窑内传热和阻力损失的影响

料球粒径对立窑内传热和阻力损失的影响商树桓，刘永杰（山东建材学院无机材料系，济南，２５００２２）摘要根据实验数据并结合理论，分析讨论了科球直径和换热热阻、流动阻力损失之间的关系。并以此为基础，提出了生料球最佳直径的确定方法。关键词水泥立窑，料球，阻力...     

关于Abel群上的四维幻立方及其算法

给出Abel群Z43上的3阶四维(超级)幻立方及其算法,并将这种方法推广到Z43(素数p=2n+1,n=1,2,3…)的p阶幻立方、P阶四维(超级)幻立方的递推生成与构造上.     

Study on the Robot Robust Adaptive Control Based on Neural Networks

Force control based on neural networks is presented. Under the framework of hybrid control, an RBF neural network is used to compensate for all the uncertainties from robot dynamics and unknown environment first. The technique will improve the adaptability to environment stiffness when the end-effector is in contact with the environment, and does not require any a priori knowledge on the upper bound of syste uncertainties. Moreover, it need not compute the inverse of inertia matrix. Learning algorithms for neural networks to minimize the force error directly are designed. Simulation results have shown a better force/position tracking when neural network is used.     

具有K条顶边齿轮图的优美性

文[1][2]中分别给出了轮图和齿轮图的优美性，本文证明了将n个具有K条边的星图TK的非悬挂点分别与齿轮图n个顶点相联所得图是优美的；从而得到文[3]中所提猜想的一个结果，     

挤压流型气力输送的性能研究

该文对于一种新型的气力输送技术─—挤压流型气力输送的设备及有关技术性能做了较为深入的研究,并与其它气力输送技术做了对比。     

联图P13VTn和P1nVT3的优美性

给出了一类图Ｐ１ ３／ＶＴｎ和Ｐ１ｎ／ＶＴ３,并给出了其优美性的证明。     

熔融体系下钢铁表面碳化物覆层成长动力学研究

用非稳态扩散传质和规则溶液亚格理论建立了熔融体系下钢铁材料表面碳化物覆层成长动力学模型,并用硅还原Ｖ２Ｏ５－Ｎａ２Ｏ－Ｂ２Ｏ３熔融体系下４５,４Ｃｒ５ＭｏＳｉＶ１,Ｔ１０,Ｃｒ１２０ＭｏＶ四种钢碳化钒覆层实验进行了分析验证,结果表明,模型与实验结果吻合良好,碳化物覆层成长速度主要受基体中的碳活度,处理温度和时间等因素控制。     

考虑相关性的串联系统动态机会成组维修优化

多部件串联系统存在复杂的相关性,制定最优的维修策略以保持最低的维护成本是设备科学管理的关键之一。本文提出多部件串联系统动态成组机会维修策略。该策略在考虑部件间的经济相关性和结构相关性的基础上,以节省的总维修成本最大为目标,构建了有限时间内系统维修优化模型;应用了遗传算法对系统各部件进行分组优化,解决了NP难问题;应用滚动计划,将长期计划与短期计划相结合,实现对维修计划的动态实时更新。案例分析表明,该方法能够有效地降低维修成本,值得在工程实践中借鉴。