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1.
Predicting the goals of internet users can be extremely useful in e-commerce, online entertainment, and many other internet-based applications. One of the crucial steps to achieve this is to classify internet queries based on available features, such as contextual information, keywords and their semantic relationships. Beyond these methods, in this paper we propose to mine user interaction activities to predict the intent of the user during a navigation session. However, since in practice it is necessary to use a suitable mix of all such methods, it is important to exploit all the mentioned features in order to properly classify users based on their common intents. To this end, we have performed several experiments aiming to empirically derive a suitable classifier based on the mentioned features.  相似文献   
2.
高精度磁测在多金属矿区勘查中应用广泛,它对弱磁性目标物的勘查以及隐伏磁性体在地表产生的弱磁异常研究都有良好的效果。本文是通过对在粤北某多金属矿区开展高精度磁测扫面工作,探测矿区多金属矿化引起的磁异常,结合地质成矿规律进行综合解释,对多金属矿化体深部找矿进行预测,为下一步开展地质找矿或工程验证提供靶区。  相似文献   
3.
吴昊  华庆一 《软件》2014,(7):1-6
PLML是描述人机交互模式的一个重要工具,然而它还存在一些缺点。其中一个重要的缺点是它的元素并未明确定义,从而造成了它所描述的设计模式在基于模型的用户界面开发方法中难以自动化或半自动化地应用。针对这一问题,设计了PLML的元素的XML Schema,明确给出了该元素的形式化的描述方法。通过一个实例研究,验证了其在基于模型的用户界面开发中可以起到积极的作用。这一方法也可推广到其它的基于XML的模式描述语言中  相似文献   
4.
在分析煤矿常见电气故障的基础上,采用ATmega128单片机为控制核心,设计了一套磁力启动器控制系统。利用互感器把高压电信号转化为低压电信号,经信号处理电路后,输入到单片机内部集成的A/D,单片机对数据进行运算与比较后,得出实际电信号参数并实施保护,系统与上位机之间采用RS-485通信。系统软件部分由C语言编程实现,保护功能安全可靠。  相似文献   
5.
In this paper,we investigate methodologies to improve direct-touch interaction on invisible and intangible spatial input.We firstly discuss about the motive of looking for a new input method for whole body interaction and how it can be meaningful.We also describe the role that can play spatial interaction to improve the freedom of interaction for a user.We propose a method of spatial centered interaction using invisible and intangible spatial inputs.However,given their lack of tactile feedback and visual representation,direct touch interaction on such input can be confused.In order to make a step toward understanding causes and solutions for such phenomena,we made 2 user experiments.In the first one,we test 5 setups of helper that provide information of the location of the input by constraining the dimension it is located at.The results show that using marker on the ground and a relationship with the height of the user's body improve significantly the locative task.In the second experiment,we create a dancing game using invisible and intangible spatial inputs and we stress the results obtained in the first experiment within this cognitively demanding context.Results show that the same setup of helper is still providing very good results in that context.  相似文献   
6.
基于VITROCELL系统结合中性红摄取试验建立了全烟气暴露细胞毒性测试方法,采用建立的方法测试了加拿大深度(HCI)抽吸条件下国内外29个牌号市售卷烟主流烟气的细胞毒性。结果表明:①建立的全烟气暴露细胞毒性测试方法可以获得良好的烟气细胞毒性剂量-效应关系;②测试结果的变异系数(CV)在25%以内,方法稳定性较好。建立的全烟气暴露实验方法适合于卷烟主流烟气细胞毒性测试。  相似文献   
7.

Introduction

A usability test was employed to evaluate two medical software applications at an expert conference setting. One software application is a medical diagnostic tool (electrocardiogram [ECG] viewer) and the other is a medical research tool (electrode misplacement simulator [EMS]). These novel applications have yet to be adopted by the healthcare domain, thus, (1) we wanted to determine the potential user acceptance of these applications and (2) we wanted to determine the feasibility of evaluating medical diagnostic and medical research software at a conference setting as opposed to the conventional laboratory setting.

Methods

The medical diagnostic tool (ECG viewer) was evaluated using seven delegates and the medical research tool (EMS) was evaluated using 17 delegates that were recruited at the 2010 International Conference on Computing in Cardiology. Each delegate/participant was required to use the software and undertake a set of predefined tasks during the session breaks at the conference. User interactions with the software were recorded using screen-recording software. The ‘think-aloud’ protocol was also used to elicit verbal feedback from the participants whilst they attempted the pre-defined tasks. Before and after each session, participants completed a pre-test and a post-test questionnaire respectively.

Results

The average duration of a usability session at the conference was 34.69 min (SD = 10.28). However, taking into account that 10 min was dedicated to the pre-test and post-test questionnaires, the average time dedication to user interaction of the medical software was 24.69 min (SD = 10.28). Given we have shown that usability data can be collected at conferences, this paper details the advantages of conference-based usability studies over the laboratory-based approach. For example, given delegates gather at one geographical location, a conference-based usability evaluation facilitates recruitment of a convenient sample of international subject experts. This would otherwise be very expensive to arrange. A conference-based approach also allows for data to be collected over a few days as opposed to months by avoiding administration duties normally involved in laboratory based approach, e.g. mailing invitation letters as part of a recruitment campaign.Following analysis of the user video recordings, 41 (previously unknown) use errors were identified in the advanced ECG viewer and 29 were identified in the EMS application. All use errors were given a consensus severity rating from two independent usability experts. Out of a rating scale of 4 (where 1 = cosmetic and 4 = critical), the average severity rating for the ECG viewer was 2.24 (SD = 1.09) and the average severity rating for the EMS application was 2.34 (SD = 0.97). We were also able to extract task completion rates and times from the video recordings to determine the effectiveness of the software applications. For example, six out of seven tasks were completed by all participants when using both applications. This statistic alone suggests both applications already have a high degree of usability. As well as extracting data from the video recordings, we were also able to extract data from the questionnaires. Using a semantic differential scale (where 1 = poor and 5 = excellent), delegates highly rated the ‘responsiveness’, ‘usefulness’, ‘learnability’ and the ‘look and feel’ of both applications.

Conclusion

This study has shown the potential user acceptance and user-friendliness of the novel EMS and the ECG viewer applications within the healthcare domain. It has also shown that both medical diagnostic software and medical research software can be evaluated for their usability at an expert conference setting. The primary advantage of a conference-based usability evaluation over a laboratory-based evaluation is the high concentration of experts at one location, which is convenient, less time consuming and less expensive.  相似文献   
8.
以康明斯M11柴油机为研究对象,设计了一种实用的虚拟保养训练系统.通过综合建模方法对M11柴油机进行三维建模及材质编辑,导入到EON Studio虚拟软件中进行日常保养项目的虚拟训练设计,包括机油更换、发电机皮带张紧度检查以及冷却系统清洗等,并实现了柴油机漫游视角观察与结构原理展示.测试表明:该系统能够明确地指导参训人员进行柴油机日常保养项目的训练,具有良好的人机交互性与可操作性.  相似文献   
9.
There is increasing evidence that user characteristics can have a significant impact on visualization effectiveness, suggesting that visualizations could be designed to better fit each user's specific needs. Most studies to date, however, have looked at static visualizations. Studies considering interactive visualizations have only looked at a limited number of user characteristics, and consider either low‐level tasks (e.g., value retrieval), or high‐level tasks (in particular: discovery), but not both. This paper contributes to this line of work by looking at the impact of a large set of user characteristics on user performance with interactive visualizations, for both low and high‐level tasks. We focus on interactive visualizations that support decision making, exemplified by a visualization known as Value Charts. We include in the study two versions of ValueCharts that differ in terms of layout, to ascertain whether layout mediates the impact of individual differences and could be considered as a form of personalization. Our key findings are that (i) performance with low and high‐level tasks is affected by different user characteristics, and (ii) users with low visual working memory perform better with a horizontal layout. We discuss how these findings can inform the provision of personalized support to visualization processing.  相似文献   
10.
A novel vibrotactile musical input device called the Vibrochord, which is designed to deliver patterns of vibration to the skin, not to the ear, through the use of a vibrotactile display called the Emoti-Chair, is evaluated using proposed evaluation frameworks. Findings show that the mixture of frameworks used in this study provided valuable insight into the design of this novel musical device. Results obtained through the implementation of a mixture of these frameworks show that the Vibrochord facilitated an increased accuracy rate over the traditional piano keyboard, when inexperienced vibrotactile musicians tried to repeat vibrotactile patterns or “melodies”.  相似文献   
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