High-elevation Adaptation of Motion Visual Display Modifications in the Toad-Headed Agamid Lizards(Phrynocephalus)

Understanding the process of adaptation is a key mission in modern evolutionary biology.Animals living at high elevations face challenges in energy meta bolism due to several environmental constraints(e.g., oxygen supply, food availa bility,and movement time). Animal behavioral processes are intimately related to energy meta bolism, and therefore, behavioral modifica tions are expected to be an important mechanism for high-elevation adaptation. We tested this behavioral adaptation hypothesis using va ria tions of motion visual displays in toad-headed agamid lizards of the genus Phr ynocephalus. We predicted tha t complexity of visual motion displays would decrease with the increase of elevation, because motion visual displays are energetically costly. Displays of 12 Phr ynocephalus species were collected with elevations ranging from sea level to 4600 m. We quantified display complexity using the number of display components, display duration, pathways of display components, as well as display speed for each species. Association between display complexity and elevation was analyzed using the phylogenetic generalized least squares(PGLS)model. We found that both the number of display components and the average value of tail coil speed were negatively correlated with elevation, suggesting that toad-headed lizards living at high-elevation areas reduced their display complexity to cope with the environmental constraints. Our research provides direct evidence for high-elevation adaptation from a behavioral aspect and illustrates the potential impacts of environment heterogeneity on motion visual display diversification.

EXTREMELY LOW FREQUENCY MAGNETIC FIELD SUSCEPTIBILITY OF VISUAL DISPLAY UNITS

Extremely low frequency (ELF) magnetic field susceptibility is an index of visual display unit (VDU) quality and performance. This paper provided field measured data on the susceptibility for a large variety of VDUs. A test rig was built to study the susceptibility of VDUs to magnetic fields at fundamental and third harmonic frequencies. It was found that the susceptibility level is largely dependent on refresh rate of the VDU and the orientation of the external ELF field. It was also found that the VDU susceptibility is significantly increased in the presence of harmonic frequency magnetic fields. About 30% of the tested samples have susceptibility levels higher than that stated in IEC 1000-4-8 standard.

Search Processes in the Exploration of Complex Data under Different Display Conditions

The study investigated user experience, display complexity, display type (tables versus graphs), and task difficulty as variables affecting the user’s ability to navigate through complex visual data. A total of 64 participants, 39 undergraduate students (novice users) and 25 graduate students (intermediate-level users) participated in the study. The experimental design was 2 × 2 × 2 × 3 mixed design using two between-subject variables (display complexity, user experience) and two within-subject variables (display format, question difficulty). The results indicated that response time was superior for graphs (relative to tables), especially when the questions were difficult. The intermediate users seemed to adopt more extensive search strategies than novices, as revealed by an analysis of the number of changes they made to the display prior to answering questions. It was concluded that designers of data displays should consider the (a) type of display, (b) difficulty of the task, and (c) expertise level of the user to obtain optimal levels of performance.

基于ActiveX控件技术图像浏览器的设计

简单介绍了GdViewerProAcfiveX控件的功能、属性和方法程序，重点阐述了在VisualFoxPro中应用GdViewerProActiveX控件设计图像浏览器的界面组成、属性设置和事件代码设计。

偏光3D显示器对视功能影响的研究

目的:研究不同眼位患者在观看偏光3D影像0.5 h和1 h后视功能参数的改变,探讨参数改变与视疲劳的关系。方法:选取志愿者51名,根据近距隐斜量分为3组:正位组、外隐斜组、内隐斜组。分别测量观看3D影像前、0.5 h和1 h的视功能参数,使用视疲劳调查问卷进行视疲劳程度统计。结果:按眼位分,正位组和内隐斜组观看3D影像0.5 h和1 h相比于观看前调节反应增大,差异有统计学意义(P=0.004、P<0.001,P<0.001、P=0.001)。内隐斜组观看0.5 h和1 h立体视锐度值小于观看前,差异有统计学意义(P=0.02、P=0.03)。按时间分,观看0.5 h和1 h,正位组和内隐斜组注视视差均小于外隐斜组,差异均有统计学意义(P=0.03、P<0.001,P=0.02、P=0.007)。观看1 h后,正位组和内隐斜组的注视视差斜率绝对值均小于外隐斜组,差异有统计学意义(P=0.007、P=0.013)。观看0.5 h,外隐斜组视疲劳得分大于正位组和内隐斜组,差异均有统计学意义(P=0.034、P=0.015)。结论:不同眼位患者观看3D影像后,立体视锐度有所提升;调节反应增大、注视视差变大及其斜率的改变影响了双眼协调运动,最终导致视疲劳。

4400马力内燃交流传动调车机车显示诊断软件设计

介绍了4 400马力内燃交流传动调车机车显示器界面软件设计的思路,阐述了该显示器软件结构和与以往内燃机车显示器界面软件的不同。试验表明该软件更人性化,易于操作。

Optimization method for a radar situation interface from error-cognition to information feature mapping

With the rapid development of digital and intelligent information systems, display of radar situation interface has become an important challenge in the field of human-computer interaction. We propose a method for the optimization of radar situation interface from error-cognition through the mapping of information characteristics. A mapping method of matrix description is adopted to analyze the association properties between error-cognition sets and design information sets. Based on the mapping relationship between the domain of error-cognition and the domain of design information, a cross-correlational analysis is carried out between error-cognition and design information.We obtain the relationship matrix between the error-cognition of correlation between design information and the degree of importance among design information. Taking the task interface of a warfare navigation display as an example, error factors and the features of design information are extracted. Based on the results, we also propose an optimization design scheme for the radar situation interface.