基于MCU并行接口的尿湿监测系统

尿湿监测对残疾人、瘫痪者等患有行动不便症的病人以及医院护理工作具有重要的意义。介绍了一种基于单片机并行接口方式的病床尿湿监测系统,该系统以STC89C58RD+单片机为核心,从信号采集、存储到时钟记录、液晶显示、打印输出全部采用并行接口器件;采用循环扫描,优先报警,不处理报警的设计思路,配以蜂鸣器、指示灯等声、光器件,能够实时有效监测多达96个病床的尿湿情况,并通知护理人员进行处理。该系统对报警信号响应快速、灵敏,满足实际应用要求。     

The effects of graphical encodings on reading performance of the data chart displayed on the periphery of attention

The accuracy and efficiency of estimating the true data value in visualizations is critical to the user interface design for large displays. As a variable, the attention engagement has not been the focus of existing related studies. In the current study, we intended to measure the performance users estimate proportions from a visualization under the low-attention condition. On this purpose, the dual-task paradigm was employed to simulate the scenario that data charts were read simultaneously with searching and memorizing information on the display. We evaluated eight data charts with three graphical encodings (shape, orientation and area) for the proportion value. The experimental results show that the vertical stacked chart is relatively more suitable for quantitative reading under the situation of temporary distraction. This is reflected by the high accuracy of estimation of this chart with relative less time consumption. When data charts are difficult to read, the users tend to pay less attention to information processing and make more inaccurate inferences of this primary task. Graphical encoding and the task time have a significant effect on task performances overall, while the reading accuracy seems not to vary with the difference of the primary task. The present study can be a supplement to the understanding of graphical perception and provide implications for the design of data visualization in display-human interfaces.     

数据传输系统的可编程逻辑技术实现

本文介绍了数据传输系统体系结构的设计方法，主要针对数据传输系统进行设计，详细论述了系统的总体设计、模块设计、PCI（Peripheral Component Interconnect外围部件互连）总线高速数据传输系统硬件接口设计方法,给出了系统的设计与实现方案。克服了系统中的有关数据传输速率、可靠性等方面的问题，提高了数据传输过程中抗干扰能力     

Evaluating non-speech sound visualizations for the deaf

Sounds such as co-workers chatting nearby or a dripping faucet help us maintain awareness of and respond to our surroundings. Without a tool that communicates ambient sounds in a non-auditory manner, maintaining this awareness is difficult for people who are deaf. We present an iterative investigation of peripheral, visual displays of ambient sounds. Our major contributions are: (1) a rich understanding of what ambient sounds are useful to people who are deaf, (2) a set of visual and functional requirements for a peripheral sound display, based on feedback from people who are deaf, (3) lab-based evaluations investigating the characteristics of four prototypes, and (4) a set of design guidelines for successful ambient audio displays, based on a comparison of four implemented prototypes and user feedback. Our work provides valuable information about the sound awareness needs of the deaf and can help to inform further design of such applications.     

嵌入式Linux下的FRAM驱动程序设计

针对铁电存储器(FRAM)在基于ARM9的嵌入式Linux系统下设备节点的读写及应用问题,研究Linux系统的驱动设计,分析FRAM的工作原理和硬件特性,提出基于Linux系统标准驱动架构与铁电底层预处理、读写、控制等工作机制相结合的FRAM驱动程序设计与实现流程。底层实现采用内核级基于FRAM的寻址方式,结果证明了该驱动在相应数据存储、传输中的可行性与稳定性。     

Designing an extensible architecture for Personalized Ambient Information

Ambient displays provide us with information in the background of our awareness. However, as each user has individual wishes and needs of how, which and when information is presented, the acceptance of ambient displays is low.In this paper we introduce an extensible architecture for personalized ambient information.We employ a notification system to extend the capability of a fixture to display more than one variable. Multiple variables can be updated by multiple information providers. Thereby, our architecture covers a broader spectrum of notifications from alarms to ambient information.We evaluate our concept within a dual-task experiment in comparison to preset notifications. The results show a level of self-interruption which is significantly lower than using preset notifications. Therefore our approach outperforms preset notifications and moves ambient displays closer to secondary displays in human–computer interaction.     

Ambient media for peripheral information display

In our everyday lives, we use surrounding living and working environments to arrange physical information artefacts such as books, pictures and calendars. However, when it comes to consumption of computer-based information, this is almost entirely based on attending to screens that separate us from our surroundings. In this paper, we explore the augmentative use of non-computer artefacts in our surroundings for peripheral display of digital information. We discuss system integration of such ambient media, the mapping of information to ambient media, and issues of flexibility and user control. Ambient media have been in everyday use in our work environment, and we report observations from which we conclude their utility as extensions to our digital information spaces.     

Single-phase laminar and turbulent heat transfer in smooth and rough microtubes

An experimental campaign was carried out studying laminar and turbulent heat transfer in uniformly heated smooth glass and rough stainless steel microtubes from 0.5 mm down to 0.12 mm. Heat transfer in turbulent regime proved to be coherent—within experimental accuracy—with the classic Gnielinski correlation for the Nusselt number. For the laminar case, an anomalous drop in Nusselt number for decreasing Reynolds number was observed in the smooth glass tubes. As the stainless steel tubes manifested relatively normal diabatic behaviour in this regime (apart from the evident influence of the thermal development region that increases heat transfer above the thermally fully developed value), the explanation of this unexpected diminution of the Nusselt number must be sought in the dispersion of heat, put in externally through the thin film deposited on the glass tube outer surface, to peripheral attachments to the test section. This distorts the measured energy balance of the experiment, especially as the convective force of the fluid diminishes, resulting in lower Nusselt numbers at lower Reynolds numbers.     

蜂花粉对受照大鼠抗辐射效应的研究

研究了口服蜂花粉对受照大鼠外周血白细胞（ＰＷＢＣ）数，血清超氧化物歧化酶总活力（Ｔ－ＳＯＤ），血清过氧化脂质（ＬＰＯ）终产物丙二醛（ＭＤＡ）和过氧化值（ＰＯＶ）的影响。结果表明“蜂花粉具有良好的抗辐射损伤的功能，即服食花粉组的ＰＷＢＣ数和Ｔ－ＳＯＤ明显高于对照的正常组和单放组。花粉线的ＭＤＡ和ＰＯＶ显著低于对照的正常组和单放组。提示蜂花粉的抗放射要理可能是由于蜂花粉能提高机体的造血重建力，提高体内