Android平板电脑的电子菜单优化设计

研究一种行之有效的android平板电脑的电子菜单优化设计方案。选择离散年龄段的900个受试志愿者,使用高速摄像机捕捉其使用平板电脑时的动作参数,同时考察受试者对优化前后平板电脑方案的感性量化评价。试验结果表明,菜单优化前后受试者操作速度、停顿时间、操作步数均有优化,受试者感性量化评价更倾向于优化后菜单,证明了优化方案的可行性。     

在线考试系统中用户模块的设计与实现

为了降低不必要的繁琐劳动,进一步节省人力以及物力,并且减少试卷误判、漏判等情况,在线考试是在未来将大面积普及的考试方式,这种方式也会使得对学生的测试结果更加客观、公平.本文通过阐述开发在线考试系统的实用性,并且对其中用户模块的设计进一步讨论和实践,并对学生测试端和考试端提出一些切实可行的建议.     

The role of media in user participation: Focusing on the knowledge activity in online space

Media technology have been considered a catalyst for boosting communication between the sources of information. Contrary to traditional media, new media which use online communication shows high interactivity properties. This characteristic allows people to participate in collective activities such as discussion, evaluation, or creating documents. Consequently, the role of media in online space has focused on delivering individual knowledge to others rather than just adopting selected information. We studied the effect of media usage patterns on creating knowledge in online communities. In our study, we divided user groups into three based on the degree to which people participate in knowledge collaboration in the online space: active participant, passive participant, and bystander. The results indicate that the active participant group is most likely to use smartphone and tablet PC to create knowledge in online space which means they prefer high accessibility rather than familiar mediators.     

The use of icons, earcons, and commands in the design of an onlinehierarchical menu

Important goals for interface designers are to determine when it is beneficial to use iconic or command-based menus and how these traditional menu systems can be enhanced by the use of sound. To investigate this topic, 28 subjects were asked to maneuver through one of four different implementations of an interactive software package in order to execute a target command using either an iconic or command-based menu with or without the use of sound. The sounds descended in pitch as the depth of the menu increased, and were used as an auditory cue to code the location of a particular menu item. The results indicate that icons were more easily remembered than commands, but that commands were easier to locate under the highest level branch of the menu. The results also indicate a trend toward faster performance times with the use of command-based menus in comparison to iconic-based menus designed with the same structure. However, there was no difference in performance within iconic or command-based menus when sound was included in the user interface. Implications for user interface design are discussed     

认知无线电传感器网络CSMA协议中主用户和次用户的性能分析

针对认知无线电传感器网络(C RSN)中物理层特性高度可变带来的性能不确定性,在CRSN中定义了两种基础性能指标(带宽和时延),并分析了基于载波侦听多路访问(CSMA)的介质访问控制协议的性能.首先,在给定的主用户(PU)业务模型下利用CSMA算法估计单个次级用户(SU)的潜在带宽;然后,推导在不同业务信道同时传输多个SU的聚合带宽;最后,利用优先级队列模型M/G/C估计介质访问中的时延.性能分析表明,通过使用分布式信道协作结合CSMA的并发传输,聚合带宽可增加5倍,利用不同业务信道同时传输明显降低了分组时延.     

UI设计中用户体验研究

计算机技术和互联网的发展,使技术创新形态正在发生转变。以用户为中心、以人为本越来越得到重视。用户体验也被称作创新2.0模式的精髓。视觉体验是一种以单纯的生理活动与人的复杂思维活动相互作用的认知方式,这种方式受到感官因素、人自身文化素质因素、环境因素等影响。文章探讨了交互体验、情感体验、视觉体验等在UE设计中的应用。     

基于用户体验的移动终端UI设计

在计算机网络技术迅速发展的时代,移动终端产品已经成为了主流产品,交互设计对APP设计来说也非常重要,友好型界面设计成为赢得市场和用户的关键。文中先简单介绍了UI设计和用户体验,在此基础上设计了"我爱我家365"小区物业APP,它集新闻共享、物业沟通于一身,能更好地为用户服务,最后对物业管理系统进行了设计,有视频监控、联网报警等功能,更方便地处理小区业务。     

IDS测试与评估的方法设计

本文在给出IDS的性能指标之后,提出了IDS测试方案,并以该方案为基础,对网络背景流量仿真、攻击流仿真、误报率测试和漏报率测试等几个重点和难点问题进行了深入研究。其测试结果可以比较客观、准确地反映出IDS的性能,从而使用户或生产商对IDS进行比较准确的评估。     

操作系统安全测评系统设计

本文设计了一个Unix/Linux安全测评系统,该系统基于数据驱动框架,实现了测评过程的自动化。测评分为单元、系统两级,单元级测试对系统底层的单元进行安全策略的检查,系统级测试着眼于系统整体的安全性能,分别对几个子系统进行测试。最后给出了文件子系统安全测试的实例。     

Usability evaluation of high-level user assistance for robot mission specification

MissionLab is a mission specification system that implements a hybrid deliberative and reactive control architecture for autonomous mobile robots. The user creates and executes the robot mission plans through its graphical user interface. As robot deployments become more common in highly stressful situations, such as in dealing with explosives or biohazards, the usability of their mission specification system becomes critical. To address this need, a mission-planning "wizard" has been recently integrated into MissionLab. By retrieving and adapting past successful mission plans stored in its database, this new feature is designed to simplify the user's planning process. The latest formal usability experiments, reported in this paper, testing for usability improvements in terms of speed of the mission planning process, accuracy of the produced mission plans, and ease of use is conducted. This paper introduces the mission-planning wizard, describes the usability experiments (including design), and discusses the results in detail.     

Android下基于用户识别的文件共享设计与实现

针对Android文件共享的安全需要,提出了一种基于用户识别的文件共享应用设计方案,并实现了该方案.该应用分为服务器端和移动终端两部分.服务器端为移动终端提供注册、识别、路由服务.测试表明,该应用能够提供基于用户识别的安全保护,阻止未在服务器端注册的用户使用该应用进行文件共享,达到了设计目的.     

情感化交互设计在个人用户APP中的体现与应用

为了探究情感化交互设计在个人用户APP中体现与的应用方式,文章以情感与用户行为之间的关系为切入点,通过理论论述、案例分析归纳等方法,从用户体验的要素出发,深入分析情感化交互设计在个人用户APP设计中具体的应用方式。基于满足基本功能需求的产品,只有充分考虑用户的情感交互,专注于更为感性的设计因素,才能进一步提高APP的用户数量,提升产品的用户体验满意度。     

基于用户体验的4G端到端业务与网络质量测试工具

中国移动自主研发了基于用户体验的端到端业务与网络质量评测工具,实现端到端业务质量和性能评测,实现现网真实"用户感知"的可测、可量、可知.基于用户体验的4G端到端业务与网络质量测试工具是面向业务质量和移动互联网网络测试的专业工具,支持Android、iOS操作系统,贴近用户的真实使用场景,实现真正以"用户"为中心的端到端业务质量评测,具备基础通信、网络性能、用户体验、终端性能等测试能力,能够从用户的角度反映实际业务和网络的运行情况、性能质量.该工具多个版本全面支撑了中国移动全网4G试商用城市验收测试、4G全网常态化端到端服务监测,填补了业内自有用户体验评测工具的空白,受到多方好评.     

114号码资料自动核查系统设计方案

提出了一个依托现有的114查号系统，实现对114号码资料进行自动核查的解决方案。     

The mutual information criterion for SPECT aperture evaluation and design

An aperture performance criterion for single-photon-emission computed tomography (SPECT) that is based on the mutual information (MI) between the source and detector processes is proposed. The MI is a measure of the reduction in uncertainty of the emitter location, given the detector data, and it takes account of the inherent tradeoffs between the effects of sensitivity and resolution on source estimation accuracy. Specific expressions for the MI are derived for one-dimensional linear geometries and two-dimensional, parallel-slice, ring geometries under the assumptions of Poisson emission times, uniform emission angles, no scattering, and a known lost-count correction factor. For one-dimensional geometries a necessary and sufficient condition for an aperture to maximize the mutual information is given. The MI-optimal apertures are derived for various source distributions using an iterative maximization procedure. The MI is then numerically calculated for various ring apertures associated with the parallel-slice SPRINT II system.     

A method for online detection and lifespan evaluation of light sources

Light emitting diode (LED) light source degradation detection and lifetime evaluation usually use the data of light flux change as a basis, but the process of light flux measurement is complicated and tedious, requiring the use of an integrating sphere, and cannot be performed online. This is unfriendly to the detection of machine vision light sources used in production lines. To address this problem, this paper proposes and designs a method for online detection and lifetime evaluation of light sources by using a mini spectrometer to detect the intensity of light sources online, and evaluates the light degradation and lifetime of light sources based on the changes in light intensity during use. This determines whether the light source needs to be adjusted or replaced, avoiding misjudgment or missed judgment in production detection due to light source degradation. The experiment was conducted on LED under high-temperature accelerated aging. The light intensity data after aging was fitted by an acceleration and life evaluation model, and the fitting result showed that the error of life evaluation by this method was 8.37%. As a comparison, this paper also detects the changes in light flux of light sources during the experiment, and the average error between the decay of light intensity and the decay of light flux was only 0.102%. It has been validated that the error in evaluating the lifetime of light sources using this method is 10.71%, and the accuracy of the evaluation is about 90%. The results show that the method is accurate, reliable, and can be used as a basis for online detection and evaluation of LED light source degradation.     

Pulsed Doppler signal processing for use in mice: design and evaluation

We have developed and evaluated a high-frequency, real-time pulsed Doppler and physiological signal acquisition and analysis system specifically for use in mice. The system was designed to provide sampling rates up to 125 kilosamples/s (ksps) with software controlled data acquisition and analysis in real-time. Complex fast Fourier transforms are performed every 0.1 ms (or longer up to 10 ms) to provide 0.1-ms time resolution and using 64-1024 sample segments of the Doppler audio signals resulting in frequency resolution ranging from 122-1953 Hz. The system was evaluated by its response to frequency swept signals with slopes (accelerations) and magnitudes (velocities) comparable to actual blood velocity signals in mice. Signals up to a maximum frequency of 125 kHz and a maximum acceleration of 20 MHz/s were processed and displayed. This corresponds to a maximum velocity of 480 (960) cm/s and a maximum acceleration of 750 (1500) m/s2 when Doppler shifts are measured with a 20- (10-) MHz probe, thereby allowing us to measure high stenotic jet velocities. The directional transitions of the spectrogram across zero frequency and across Nyquist frequency (sampling rate/2) were smooth with no discernible artifacts. Signals with period as low as 2 ms were processed and displayed at sweep speed that is ten times that in clinical Doppler systems, so that measurements of small temporal events can be made with precision. Thus, the new system can measure higher blood velocities with higher spatial and temporal resolution than is possible using clinical Doppler systems adapted for use in mice.