血细胞自动分析仪微机处理系统硬件设计

结合电阻法原理和微型计算机技术,研制出一种能检测血细胞大小和数量的自动分析仪器。文中介绍了血细胞自动分析仪的组成、工作原理,描述了信号采集及预自理电路和接口电路的设计思想及特点,讨论了高精度程序控恒流源、微弱信号放大电路、峰值检测电路,分析了仪器的主要干扰源及抗干扰的措施。所设计的电路已成功地应用在血细胞自动分析仪中。最后给出了由计算机集到的血细胞信号的波形。     

基于数据融合的多目标无源跟踪的弹性网络方法

弹性网络被应用于多目标／多传感器无源识别和跟踪问题。在传感器仅能获得目标方位角的条件下,首先基于多传感器数据融合技术,分析了目标的聚类特征;然后借助期望模板提出了一种非全连接环形结构的弹性网络模型,分析了该模型识别和跟踪目标的动力学机制,讨论了网络应场内的ＷＴＡ竞争学习机制降低了网络的计算量,感应场的自适应性可以使神经元跳出局部极小点,提高目标识别率。     

基于CTI呼叫中心的ACD算法研究

通过阐述了基于CTI（计算机电话集成）技术呼叫中心的经典ACD（自动呼叫分配）排队Erlang—C模型,并分析了其实际应用中的缺陷,在此基础上提出了两种改进ACD算法：线性加权优先级排队算法、预测等待时间算法,这两种算法具有很大的灵活性,实用性及智能性!     

New approach to the automatic segmentation of coronary artery in X-ray angiograms

For the segmentation of X-ray angiograms （XRA）, the essential feature and the prior knowledge of angiographic image were analyzed, and a multi-feature based fuzzy recognition （MFFR） algorithm was proposed to infer the local vessel structure in this paper. Guided by the prior knowledge of artery vessel, a probability tracking operator （PTO） can rapidly track along the artery tree, and walk across the weak region or gaps because of disturbance or preprocessing to angiographic image. Another, the accurate measurement of the vascular axis-lines and diameters can be synchronously implemented in the tracking process. To correctly evaluate the proposed method, a simulated image of CAT and some clinical XRA images were used in the experimentations. The algorithms performed better than the conventional one： given one start-point, on average 92.7% of the visible segments or branches was automatically delineated; the correctness ratio of vessel structure inference reached to 90.0% on the average.     

基于PC104的某型测试设备的设计实现

该文介绍了一种基于PC104总线的某型测试设备的硬件设计和软件设计方案,提出了主要问题的解决方案。该系统结构紧凑,可靠性高,已在实际生产中得到应用。     

自动报靶系统研究综述

介绍了一种基于机器视觉的自动报靶系统,该系统利用CCD摄像机不间断地对靶面进行观测,根据采集的靶面图像的特点和变化,利用计算机图像识别技术检测靶面图像中的真实弹点,然后通过弹点在靶面图中的位置来对弹点区域进行编码。在观测过程中,采用图像灰度配准与增强技术、图像的几何配准技术和小波变换等算法来解决由于光照变化、大风等干扰因素对识别精度的影响。在实际应用中,能够达到较高精度,并能大大减少错报和漏报的情况,该系统精度高、成木低、完全可靠,能够很好地应用于部队训练和射击比赛中有着重要的实际意义和良好的应用前景。     

浅析无线传感器网络及其在目标跟踪中的应用

无线传感络(WSN,Wireless Sensor Networks)是新兴的下一代传感器网络,是当前在国际上备受关注的、涉及多学科高度交叉、知识高度集成的前沿热点研究领域。该文简要介绍无线传感器网络的体系结构,对无线传感器网络的特点及节点定位、时间同步等支撑技术进行了探讨。最后阐述了无线传感器网络在目标跟踪中的应用。     

基于系统文件补丁方法的Autorun型病毒根治技术

针对近年大量病毒均借助自动播放功能交叉感染和自动激活的客观实际,提出了一种基于系统外壳文件补丁方法的Autorun型病毒根治方案,并且给出了自动部署这种方案的简便方法,同时在此基础上实现了全新部署系统时的针对Autorun型病毒的先天加固。     

Robust tracking control for a class of MIMO nonlinear systems with measurable output feedback

This paper proposes a robust output feedback controller for a class of nonlinear systems to track a desired trajectory. Our main goal is to ensure the global input-to-state stability (ISS) property of the tracking error nonlinear dynamics with respect to the unknown structural system uncertainties and external disturbances. Our approach consists of constructing a nonlinear observer to reconstruct the unavailable states, and then designing a discontinuous controller using a back-stepping like design procedure to ensure the ISS property. The observer design is realized through state transformation and there is only one parameter to be determined. Through solving a Hamilton–Jacoby inequality, the nonlinear control law for the first subsystem specifies a nonlinear switching surface. By virtue of nonlinear control for the first subsystem, the resulting sliding manifold in the sliding phase possesses the desired ISS property and to certain extent the optimality. Associated with the new switching surface, the sliding mode control is applied to the second subsystem to accomplish the tracking task. As a result, the tracking error is bounded and the ISS property of the whole system can be ensured while the internal stability is also achieved. Finally, an example is presented to show the effectiveness of the proposed scheme. Copyright © 2007 John Wiley & Sons, Ltd.     

便携式航海仪器电路虚拟检测和诊断系统

为了实现对航海仪器电路的自动化检测和诊断,达到降低维修成本和提高维修效率的目的,研制了一套便携式航海仪器电路检测和诊断系统;系统基于虚拟仪器技术,在计算机内实现了虚拟的示波器、万用表、信号发生器、频谱分析仪等测试仪器,能对航海仪器内部的信号进行模拟和检测;采用专用和通用检测相结合的设计思路和改进的接口技术,针对航海仪器不同插装单元的特点开发了各自专用的检测与诊断程序,对于没有专用检测程序的单元,可以通过通用检测程序检测;还能轻松实现二次开发,使系统得到不断的丰富和改善。