基于触摸显示屏的手势输入字符方法研究

针对触摸显示屏的操作特点,利用简单通用手势——滑动和点击,提出了两种触摸手势输入字符方法。第一种是基于T9键盘的改进输入方法,第二种是基于全键盘的改进输入方法。这两种输入方法节省屏幕使用空间,使用户更易学习的同时降低了误输入机率。     

The impact of on-road motion on BMS touch screen device operation

This study investigates the effect of vehicle motion on performance, usability and workload for a touch screen in-vehicle Battle Management System (BMS). Participants performed a series of battle management tasks while a vehicle was driven over sealed (characteristic of 'normal' vehicle motion) and unsealed (characteristic of 'high' vehicle motion) roads. The results indicate that unsealed road conditions impair the performance of information input tasks (tasks that require the user to enter information, e.g. text entry) but not information extraction tasks (tasks that require the user to retrieve information from the system, e.g. reading coordinates). Participants rated workload as higher and the system as less usable on the unsealed road. In closing, the implications for in-vehicle touch screen design and use in both military and civilian driving contexts are discussed. Practitioner Summary: The effect of motion on interacting with in-vehicle touch screen devices remains largely unexplored. This study examines the effect of different levels of vehicle motion on the use of a BMS. Using the system under off-road conditions had a detrimental impact on workload, performance and usability.     

Mathematically modelling the effects of pacing,finger strategies and urgency on numerical typing performance with queuing network model human processor

Numerical typing is an important perceptual-motor task whose performance may vary with different pacing, finger strategies and urgency of situations. Queuing network-model human processor (QN-MHP), a computational architecture, allows performance of perceptual-motor tasks to be modelled mathematically. The current study enhanced QN-MHP with a top-down control mechanism, a close-loop movement control and a finger-related motor control mechanism to account for task interference, endpoint reduction, and force deficit, respectively. The model also incorporated neuromotor noise theory to quantify endpoint variability in typing. The model predictions of typing speed and accuracy were validated with Lin and Wu's (2011) experimental results. The resultant root-mean-squared errors were 3.68% with a correlation of 95.55% for response time, and 35.10% with a correlation of 96.52% for typing accuracy. The model can be applied to provide optimal speech rates for voice synthesis and keyboard designs in different numerical typing situations.

Practitioner Summary: An enhanced QN-MHP model was proposed in the study to mathematically account for the effects of pacing, finger strategies and internalised urgency on numerical typing performance. The model can be used to provide optimal pacing for voice synthesise systems and suggested optimal numerical keyboard designs under urgency.     

Biomechanical analysis of upper limb during the use of touch screen: motion strategies identification

Abstract

Nowadays touch technology is growing and developers try to make it ever more intuitive and easier to use. This present work focused on the upper limb joint coordination during the achievement of puzzles on touch screen. A 5-inch and 10-inch devices were used to perform 9 and 16 pieces puzzles dragged with digits. The conclusions showed an increase in joint solicitation with the number of piece and the touch screen size. Moreover, three interactions strategies proved to be an evidence: the ‘wrist strategy’ preferentially implying wrist flexion/extension, the ‘elbow strategy’ preferentially implying the elbow flexion/extension and the ‘neutral strategy’ mobilising equally the two joints. From an ergonomic point of view, the data about how the upper limb segments are mobilised while interacting with the screen could be relevant to increase the adaptability of the devices to the user, including users with motor impairments.

Practitioner Summary: Information about the biomechanical organisation of movement during interaction with touch devices appears relevant in order to develop applications adapted to the motor capacities of users. From the analysis of joint angles when performing several times a puzzle with healthy subjects, three motor strategies were highlighted.     

Mobile touch screen device use and associations with musculoskeletal symptoms and visual health in a nationally representative sample of Singaporean adolescents

This study aimed to describe contemporary technology use, especially smartphones and tablets (mobile touch screen devices), and examine associations with musculoskeletal symptoms and visual health among adolescents in Singapore. A representative sample of 1884 adolescents (50.4% girls) from grades primary 5 to post-secondary (10–18?years old), recruited from 13 schools, completed an online questionnaire in class. Total technology use was high, with smartphone duration being highest (mean?=?264 [SD?=?243] min/day). Patterns of use, including multitasking and bout length, were influenced by gender, school level, type of device and activities. Musculoskeletal discomfort and visual symptoms were commonly reported. After adjusting for potential confounders, more hours/day of smartphone use was associated with increased risk of neck/shoulders, upper back, arms and wrist/hand discomfort (OR?=?1.04[95%CI?=?1.01–1.07] to 1.07[1.03–1.10]) and visual symptoms (OR?=?1.05[1.02–1.08]), but was associated with decreased odds of myopia (OR?=?0.97[0.94–0.99]). No significant associations were found for tablet use.

Practitioner Summary: 1884 adolescents in Singapore completed an in-depth questionnaire regarding their use of technology. The smartphone was the device with the highest usage, and greater smartphone use was associated with increased odds of musculoskeletal and visual symptoms. High use of smartphones has physical health implications for adolescents.     

Effects of feedback and dwell time on eye typing speed and accuracy

Eye typing provides a means of communication that is especially useful for people with disabilities. However, most related research addresses technical issues in eye typing systems, and largely ignores design issues. This paper reports experiments studying the impact of auditory and visual feedback on user performance and experience. Results show that feedback impacts typing speed, accuracy, gaze behavior, and subjective experience. Also, the feedback should be matched with the dwell time. Short dwell times require simplified feedback to support the typing rhythm, whereas long dwell times allow extra information on the eye typing process. Both short and long dwell times benefit from combined visual and auditory feedback. Six guidelines for designing feedback for gaze-based text entry are provided.     

基于串口触摸屏在医疗脉冲冷敷系统的应用

串口触摸屏是可接收触头等输入信号的感应式液晶显示装置,当接触屏幕上的图形按钮时,屏幕上的触觉反馈系统可根据预先编程的程式驱动各种连结装置实现对计算机的操作,可用以取代机械式的按钮面板,并借由显示画面显示出生动的影音效果。同时,由于串口触摸屏具有坚固耐用、反应速度快、节省空间、易于交流等优点,则串口触摸屏在办公、工业控制、多媒体教学、消费电子、银行等领域应用广泛,但触摸屏在医疗器械的应用还不是十分广泛。主要介绍串口触摸屏在医用医疗脉冲冷敷系统的应用实例,以便大家更好地了解串口触摸屏的构成、工作过程、基本控制等原理。     

基于MT6056I触摸屏和PLC的装配流水线控制系统

针对饮料加工车间流水线上四组传送带组成的一个椭圆工作台上所需完成的加饮料、盖盖子、打标签等三个动作,给出了采用西门子公司的S7-300型PLC作为控制器,并采用维纶MT6056I触摸屏作为操作界面来设计饮料瓶自动化装配流水线的控制系统设计方法。系统可大大解放劳动力,提高企业生产效率。     

基于PLC的备自投试验仪的研制与应用

备自投是广泛应用于电网中的自动装置,它的作用是在变电站失去工作电源时,自动将备用电源投入,保证可靠供电.对备自投的检验必须将与其相关联的线路全部停电,进行整组传动试验,以验证其控制逻辑的正确性.但运行中往往会因停电困难而不能进行,导致检验项目不完整,其正确性得不到保证.针对这一问题,以PLC和触摸屏为核心元件,研制了一种备自投校验仪,仪器能在电源不停电状态下完成对备自投逻辑的完整检验,确保备自投在电网故障时能可靠、正确动作,提高供电可靠性.     

PLC和触摸屏及变频器在中药粉碎系统的应用

介绍以PLC为核心的控制系统,并应用变频器和触摸屏对中药粉碎系统进行实时监测与控制,实现自动与智能化控制。     

基于MiniGUI的IAL定制及触摸屏驱动程序开发

在嵌入式系统开发中,MiniGUI是典型的图形用户界面系统,触摸屏是常见的输入设备,而输入抽象层作为两者的结合点在人机交互开发中起着重要作用.在分析IAL的数据结构与源代码的基础上,通过修改已有的dummy代码和设置触摸屏控制器相关的寄存器的值,实现了具体的IAL和相关的触摸屏驱动程序,该程序很好地满足了嵌入式应用的需要.     

PLC和触摸屏在乳品行业的CIP清洗系统中的应用

本文结合乳品行业的CIP清洗系统的工艺控制要求,详细介绍了基于PLC和触摸屏控制系统的总体方案、硬件配置、软件流程和触摸屏界面.     

基于ARM9的手写体数字识别技术设计与实现

论文围绕ARM9核心的硬件平台,研究在Linux上实现手写体数字的自动识别的方法.通过分析手写体识别技术的发展状况,ARM核心系列芯片的应用情况,说明了在ARM平台上实现手写体数字识别功能的可行性.对液晶及触摸屏进行了配置及调试,最后将Linux系统移植到ARM平台上.并结合当今图像识别技术的发展,阐述了模式识别问题中图像预处理的主要方法,分析了图像预处理过程中各个模块的数学原理.     

A note on monotone complexity and the rank of matrices

We shall give simpler proofs of some lower bounds on monotone computations. We describe a simple condition on combinatorial structures, such that the rank of the matrix associated with these structures gives lower bounds on monotone span program size and monotone formula size. We also prove an upper bound on the rank of the corresponding matrices, and show that such structures can be constructed from self-avoiding families. As a corollary, we obtain an upper bound on the size of self-avoiding families, which solves a problem posed by Babai and Gál [Combinatorica 19 (3) (1999) 301-319].     

基于PLC对喷泉及LED灯电气控制系统改造

本次改造采用了触摸屏来进行手动操作,使得选择多样性;采用了变频器调速技术,实现喷泉水柱的高低变化;采用PLC作为控制器,对喷泉和LED潜水灯进行控制,使其能有多彩的变化.     

基于PLC和变频器的糖厂分蜜机控制系统的设计

根据制糖过程中分蜜的工艺要求,结合西门子PLC和变频器对分蜜机控制系统进行自动化改造,取代了过去的多极交流电动机的调节方式,现实了多级速度调节。同时采用西门子触摸屏MP277作为人机交换界面,实时显示离心机运行状态以及对控制参数的设置。该分蜜机控制系统具有调速性能好、节能效果显著等特点,对提高白砂糖质量具有重要的作用。     

基于PLC和触摸屏的煤矿充填材料制备工艺控制系统

介绍以PLC为控制系统核心,并用触摸屏和琴式按键操作台对材料制备过程及充填过程进行观测、控制的煤矿充填材料制备工艺控制系统。根据设计要求和实际工况设计了新型沉筒式液位计,作为在高温、重粉尘、蒸汽、搅拌及材料有较强粘附性和凝固性情况下的液位检测装置。     

A note on compressed sensing and the complexity of matrix multiplication

We consider the conjectured O(N2+?) time complexity of multiplying any two N×N matrices A and B. Our main result is a deterministic Compressed Sensing (CS) algorithm that both rapidly and accurately computes A⋅B provided that the resulting matrix product is sparse/compressible. As a consequence of our main result we increase the class of matrices A, for any given N×N matrix B, which allows the exact computation of A⋅B to be carried out using the conjectured O(N2+?) operations. Additionally, in the process of developing our matrix multiplication procedure, we present a modified version of Indyk's recently proposed extractor-based CS algorithm [P. Indyk, Explicit constructions for compressed sensing of sparse signals, in: SODA, 2008] which is resilient to noise.     

基于PLC和触摸屏的多功能饮水净化设备控制系统的研究

针对自主研发的多功能饮水净化设备,集成运用PLC控制技术和触摸屏终端技术,研发了一套具有智能报警的控制系统.该系统实现了净水、供水、药洗、排水和加热等功能,便于设备运行过程的自动化控制,参数与状态的实时监测和在线调整,以及根据参数变化实现智能报警.实验结果表明,该设备产水基本水质符合国家生活饮用水卫生标准(GB5749-2006)规定.该系统界面直观、操作方便,提高了系统的可靠性、维护性和智能化水平.