Focal Ischemic Injury to the Early Neonatal Rat Brain Models Cognitive and Motor Deficits with Associated Histopathological Outcomes Relevant to Human Neonatal Brain Injury

Neonatal arterial ischemic stroke is one of the more severe birth complications. The injury can result in extensive neurological damage and is robustly associated with later diagnoses of cerebral palsy (CP). An important part of efforts to develop new therapies include the on-going refinement and understanding of animal models that capture relevant clinical features of neonatal brain injury leading to CP. The potent vasoconstrictor peptide, Endothelin-1 (ET-1), has previously been utilised in animal models to reduce local blood flow to levels that mimic ischemic stroke. Our previous work in this area has shown that it is an effective and technically simple approach for modelling ischemic injury at very early neonatal ages, resulting in stable deficits in motor function. Here, we aimed to extend this model to also examine the impact on cognitive function. We show that focal delivery of ET-1 to the cortex of Sprague Dawley rats on postnatal day 0 (P0) resulted in impaired learning in a touchscreen-based test of visual discrimination and correlated with important clinical features of CP including damage to large white matter structures.     

基于多工位组合机床的数字化研究

针对组合机床的运动特点,采用多台SDPLC单轴控制系统实现对转台式多工位组合机床的数字化控制,应用系统提供的PLC程序及STEP程序完成组合机床的逻辑控制及加工运动,通过对控制系统通讯功能的开发,利用ADP软件依据人机通讯地址所需求的转换关系,在触摸屏上完成满足用户需求的人机界面设计.     

User discomfort,work posture and muscle activity while using a touchscreen in a desktop PC setting

An experimental study was conducted to evaluate physical risk factors associated with the use of touchscreen in a desktop personal computer (PC) setting. Subjective rating of visual/body discomfort, shoulder and neck muscle activity, elbow movement and user-preferred positions of the workstation were quantified from 24 participants during a standardised computer use task with a standard keyboard and a mouse (traditional setting), with a touchscreen and the standard keyboard (mixed-use condition) and with the touchscreen only. The use of a touchscreen was associated with a significant increase of subjective discomfort on the shoulder, neck and fingers, myoelectric activity of shoulder and neck muscles and percentage of task duration that arms were in the air. Participants placed the touchscreen closer and lower when using touch interfaces compared with the traditional setting. Results suggest that users would need more frequent breaks and proper armrests to reduce physical risks associated with the use of a touchscreen in desktop PC settings.

Statement of Relevance: In this study, subjective discomfort, work posture and muscle activity of touchscreendesktop PC users were quantitatively evaluated. The findings of this study can be used to understand potential risksfrom the use of a touchscreen desktop PC and to suggest design recommendations for computer workstations with the touchscreen.     

PLC在导热油加热冷却系统中的应用

主要介绍导热油加热冷却系统及PLC在其中的应用、西门子S7-300PLC编程过程、PLC的系统硬件配置及触摸屏组态和系统实际运行情况.     

基于PowerPC的嵌入式Linux桌面系统

基于32位处理器的嵌入式开发平台已广泛使用触摸屏设备和基于图形库的嵌入式桌面系统作为人机交互接口。该文介绍了在基于PowerPC体系结构的Total5200开发平台上的嵌入式Linux桌面系统的设计与开发过程，包括Linux触摸屏设备驱动程序的开发与Qtopia桌面系统的移植，并就其中常见的问题进行了分析。给出了整个嵌入式桌面系统在JFFS2文件系统上的实现方式。     

触摸屏触感振动反馈设计研究

作为一种全新的人机交互技术,触摸屏已广泛应用于工业、医疗、通信、娱乐、教育等领域.触觉感受作为提升用户体验的有效途径,也逐渐引起了研究者的关注.文中对触摸屏触感振动反馈系统设计进行了研究,建立了触摸屏振动系统的力学模型,对触摸屏进行了振动模态仿真分析,对模型的正确性进行了实验验证,以指导触摸屏系统触感反馈功能的设计.     

码垛生产线整形输送单元的设计与计算

摘要：整形输送是机器人自动码垛生产线能否稳定生产的核心,文中介绍了机器人自动码垛生产线的各组成单元,并就整形输送单元的机械结构、电气控制设计,以及主要元器件选型与计算进行了详细描述,结合实例,给出具体的计算与设计方法,供同行参考。     

基于PLC及触摸屏的隧道通风系统的设计

根据公路隧道的特点,提出了一种基于PLC及触摸屏技术的隧道通风控制系统的设计。将PLC、触摸屏、变频器三者有效结合,利用传感器在实时检测隧道内环境的基础上,通过PLC控制变频器驱动隧道内风机的运行,优化隧道内空气质量的同时也节约了能源。触摸屏的引入能够实现对系统工作全程的实时自动监控,最后利用计算机模拟技术实现了对该控制系统的整体模拟和调试。实验证明,该系统运行顺畅,性能可靠,人机交互界面友好,自动化水平有效提高,具有良好的市场前景及应用价值。     

基于Trio运动控制器的直角坐标机器人控制系统

介绍了一种直角坐标机器人的主要结构及其功能．详细分析了该机器人控制系统的结构及其工作原理,开发了控制系统应用软件。系统采用触摸屏＋运动控制器的结构形式,以Trio的Eur0205x型控制器为系统控制核心,触摸屏作为上位机,通过加入遥控、超声波模块,实现了对机器人的远距离操作。系统在设计过程中不论硬件还是软件采用了模块化的思想,保证了控制系统的开放性和可移植性。     

富士变频器在冷轧钢生产线的应用

文章讲述了赤峰远联钢铁有限责任公司冷轧带肋钢筋生产线的电气系统应用富士变频器取代了原有接触器,使该生产线上的电路线路简化、控制准确,缩短了现场人员维护及事故处理时间,设备故障大大减少,机器运行效率明显提高。经过运行,节省了电器配件的费用,降低了生产成本,提高了经济效益。