基于TMS320F2812的液晶显示模块接口设计

为适应工业应用现场以及智能化仪器仪表前端显示的需要,阐述了TMS320F2812DSP和QH2001液晶显示模块的原理及特性,提出了一种基于高速DSP处理器控制低速液晶显示模块的接口设计方案,并对该方案的硬件接口电路和软件驱动程序进行了设计,同时给出了软、硬件实现的相应电路图、程序流程图以及具体程序段;实验调试表明,设计方案结构简单、成本低、抗干扰能力强、显示性能稳定可靠,达到设计要求,能够有效解决高速DSP对低速LCD的驱动及显示问题,并取得了良好的显示效果,对其它便携式系统显示终端的设计也具有一定参考价值。     

基于ATmega 128单片机的数字化地下管线定位仪

地下管线被视为城市的生命线。分析了地下管线定位仪的基本原理,并在此基础上详细介绍了基于ATmega 128单片机的数字化地下管线定位仪的硬件实现和软件实现,重点分析了基于磁保持继电器的分时供电电源电路。ATmega 128单片机实现了地下管线定位仪的数字化,使得定位仪能快速、准确地对地下管线进行水平定位和垂直定深。     

12.1‐in. WXGA AMOLED display driven by InGaZnO thin‐film transistors

Abstract— A full‐color 12.1‐in.WXGA active‐matrix organic‐light‐emitting‐diode (AMOLED) display was, for the first time, demonstrated using indium‐gallium‐zinc oxide (IGZO) thin‐film transistors (TFTs) as an active‐matrix backplane. It was found that the fabricated AMOLED display did not suffer from the well‐known pixel non‐uniformity in luminance, even though the simple structure consisting of two transistors and one capacitor was adopted as the unit pixel circuit, which was attributed to the amorphous nature of IGZO semiconductors. The n‐channel a‐IGZO TFTs exhibited a field‐effect mobility of 17 cm²/V‐sec, threshold voltage of 1.1 V, on/off ratio >10⁹, and subthreshold gate swing of 0.28 V/dec. The AMOLED display with a‐IGZO TFT array is promising for large‐sized applications such as notebook PCs and HDTVs because the a‐IGZO semiconductor can be deposited on large glass substrates (larger than Gen 7) using the conventional sputtering system.     

基于表层剥离原理的传递函数设计

针对体绘制领域目前存在的计算开销、经验提取和复杂人工干预等几个重要的应用问题,提出了传递函数设定的表层剥离算法。表层剥离算法通过单程交越检测和高梯度比例边缘检测,解决了表层起伏现象导致的分类误差较大,需要复杂的人工干预调整的问题;避免引入高阶偏导等复杂的计算,保持了较低的计算开销;而且形成了一种简单且能发挥用户直觉,具有较高自动化成分的传递函数设定方式,取得了较好的效果。据此开发的普及型医学图像分析系统验证了算法的有效性。     

工程图学课中的能力培养与实体建模技术

论述了工程图学引入"融入式"教学的必要性,提出在工程图学课程体系中融入实体建模技术的基本思路.     

球面折反射成像的内螺纹螺距视觉测量系统

为了实现内螺纹参数的非接触、自动化在线测量,本文以通孔螺母和盲孔螺母为检测对象,提出了一种基于球面折反射全景成像原理的内螺纹螺距参数的机器视觉测量系统。系统采集经球面折反射得到的图像,随后分割出完整的内螺纹区域;采用对比度受限的自适应直方图均衡化算法提高图像对比度,并采用中值滤波与双边滤波的组合来保护螺纹边界信息;再使用Zernike矩边缘检测算法确定每条螺纹的亚像素边缘;最终,基于折反射成像理论计算得到内螺纹螺距尺寸。与计量用螺纹综合测量机的螺距测量值进行了对比,实验结果表明该系统的平均测量误差为0.018 5 mm,满足工业生产中内螺纹螺距精度的要求,检测效率高,可用于内螺纹在线视觉检测。本研究为圆柱形内壁尺寸测量和缺陷检测提供了一种参考方案。     

基于MCX314的PCI运动控制卡设计

文中设计了一种基于MCX314的 PCI运动控制卡,其能实现三轴直线、圆弧、位模式的插补运动和四轴位置、速度、加速度控制,并从MCX314控制指令系统、硬件接口电路设计、PCI接口电路设计和驱动程序的开发等方面进行了介绍。该运动控制卡的设计实现了对机电一体化设备的精确控制,降低了设备开发成本,具有一定的应用价值。     

Neural network-based event-triggered cluster quasi-consensus for unknown multiagent systems with directed topology

This paper studies cluster quasi-consensus problem for a class of unknown nonlinear multiagent systems (MASs) with directed communication topology. First, a distributed continuous neural network (NN)-based adaptive protocol is presented for solving this problem by introducing reference model to each agent. Then, taking limited communication resource and energy consumption into account, a distributed event-triggered cluster quasi-consensus protocol is proposed. Different from the existing results, two event-triggered mechanisms are constructed in the proposed event-triggered protocol to reduce communication load and control update frequency as possible. The sufficient conditions that guarantee cluster quasi-consensus under the both proposed protocols are obtained, respectively. Zeno behavior is proved to be excluded. Finally, simulation results verify the effectiveness of the proposed protocols.     

Stabilization of uncertain networked control systems with actuator saturation and probabilistic cyberattacks

This paper investigates the stabilization of uncertain networked control systems (NCSs) with actuator saturation and cyberattacks. The cyberattacks are governed by a set of independent random variables satisfying Bernoulli distribution. To relieve the network bandwidth load effectively, an event-triggered communication strategy is proposed. By employing Lyapunov stability theory and stochastic analysis techniques, a stability criterion is obtained for the system with actuator saturation and cyberattacks. Moreover, the desired controller gain is derived by solving some matrix inequalities. Finally, the validity and applicability of the criteria are verified through numerical examples.     

石墨烯及石墨烯场效应管的辐照效应研究进展

石墨烯由于高迁移率、高导热性、柔韧性好和机械强度高等优异性能使其成为构筑新型纳米电子器件的重要材料,已成为电子信息、生物医学、显示等领域的研究热点。当石墨烯材料及其电子器件放置于含有辐照因素的场景中时,会因为与高能光子和带电粒子等相互作用而改变晶格结构或积累电荷,使石墨烯材料及电子器件的性能发生变化。本文主要综述了典型辐照因素对石墨烯及器件的主要效应及研究进展,旨在总结不同辐照在石墨烯及其电子器件中引发的物理效应,归纳其微观-宏观性质变化,为加深石墨烯材料及器件的辐照效应的理解,推动其在辐照场景中的实际应用奠定基础。