The ability of eye-tracking metrics to classify and predict the perceived driving workload

Traffic safety is directly related to the mental and physical condition of the driver. Performing regular secondary tasks while driving is an additional activity that dissipates attention and adds to the drivers' workload. Identifying driver fatigue and workload based on gaze behavior is one way to ensure a safe driving experience. The purpose of this paper is to classify and predict driving perceived workload using a set of eye-tracking metrics (gaze fixation, duration, pointing, and pupil diameter). The ability of eye-tracking metrics to predict driving workload has been investigated. As a result, frustration, performance, and temporal load showed a correlation with gaze metrics. Gaze point, duration, fixation, and pupil diameter significantly influence driving workload.Relevance to industry: Results will supply the specialists in eye-tracking/sensor technologies and traffic safety with new knowledge to improve the design of the driving performance and safety monitoring systems and efficiency of the driving process.     

基于混合策略的高精度长术语自动抽取

在目前的术语自动抽取中,双字词的精度已经达到了90.36%,但是三字以上的词的抽取精度只有66.63%,多字词的抽取成为了术语自动抽取的一个难点。该文提出了NC-value参数和互信息相结合的混合策略来识别三字以上的长术语的方法。该方法充分发挥了NC-value参数在利用词语上下文信息和互信息参数在词语结合强度两方面的优势,两者相互约束和配合,更有利于找到准确的长术语边界。采用生物信息领域Yapex语料进行实验,结果表明,三字以上长术语抽取正确率和召回率分别达到88.5%和76.6%,F测量值达到82.2%,稍高于其他方法的结果。     

道路网络中的连续最近邻查询

为了减少连续最近邻查询中计算K个最近邻的次数和减小算法需要的存储空间,提出一种道路网络中求连续最近邻的方法。给出分点的计算方法及连续最近邻查询算法,对算法的正确性、可终止性进行证明,并分析算法复杂度。与相关算法进行实验比较,得出该算法更适合于对象频繁发生变化的实际网络。     

Usability principles and best practices for the user interface design of complex 3D architectural design and engineering tools

This study proposes usability principles for the user interfaces (UI) design of complex 3D parametric architectural design and engineering tools. Numerous usability principles have been developed for generic desktop or web applications. The authors tried to apply existing usability principles as guidelines for evaluating complex 3D design and engineering applications. However, the principles were too generic and high-level to be useful as design or evaluation guidelines. The authors, all with more than 10 or 30 years of experience with various CAD systems, selected and reviewed 10 state-of-the-art 3D parametric design and engineering applications and captured what they thought were best practices, as screenshots and videos. The collected best practices were reviewed through a series of discussion sessions. During the discussion sessions, UI design principles underlying the collected best practices were characterized in the line of existing UI principles. Based on the best practices and the derived common UI principles, a new set of refined and detailed UI principles were proposed for improving and evaluating 3D parametric engineering design tools in the future.     

过氧化氢异丙苯分解反应过程建模研究

针对过氧化氢异丙苯(CHP)分解反应的系统建模问题,本文提出了基于过程数据的模糊神经网络建模方法,并根据采样数据进行了仿真实验,结果表明本方法适用于基于数据的工业过程建模。     

基于智能手机群的车辆事故自救系统

针对目前现有汽车事故自救系统需要装配特定的传感器、GPS及通信模块的缺点, 设计了一种基于智能手机群的自动碰撞与坠落检测及事故自救系统. 该系统以事故车内多部智能手机用户物理运动的加速度信号为输入样本,以多个加速度数据为依据计算阀值, 不但使得事故判断的准确度显著提高还降低了严重事故时单个车载装置或手机损毁无法实现呼救可能性. 当信号超过阀值后, 自动借助手机的拍照、GPS定位、3G联网功能实现向救援中心报警求救. 在Android平台实现原型系统. 实验结果表明, 该系统具有非常好的碰撞及坠落识别准确度     

腰果壳液改性胺固化无溶剂环氧底漆的特性研究

腰果壳液改性胺是一种新型环氧树脂固化剂,市场反映良好。对其固化性质作了进一步的探索,主要通过表干时间、附着力、剪切强度以及适用期的测试,研究腰果壳液改性酚醛胺类固化剂及其复配体系对无溶剂环氧底漆的固化特性。实验结果表明,腰果酚醛胺类固化剂在保持优异的附着力和剪切强度的情况下,提高了固化速度,是一种综合性能优异的固化剂。     

Perceptual encryption with compression for secure vector map data processing

With the rapidly rising interest in geographic information system (GIS) contents, a large volume of valuable map data has been unlawfully distributed by pirates. Therefore, the secure storage and transmission of classified national digital map datasets have been increasingly threatened. As the importance of secure, large-volume map datasets has increased, vector map security techniques that focus on secure network and data encryption have been studied. These techniques are required to ensure access control and prevent illegal copying of digital maps. This paper presents perceptual encryption on the vector compression domain for copy protection and access control of vector maps. Our algorithm compresses all vector data of polylines and polygons by lossless minimum coding object (MCO) units and perceptually encrypts using two processes using the mean points and directions of MCOs. The first process changes the position of vector data by randomly permuting the mean points of MCOs, the so-called position encryption. The second process changes the geographic shape by circularly encrypting the directions of vertices in MCOs by the XOR operator. Experimental results have verified that our algorithm can encrypt GIS digital maps effectively and simply and can also improve the compression ratio, unlike general data encryption techniques, and thus, our algorithm is very effective for a large volume of GIS datasets.     

轧辊磨削过程中砂轮磨损对比与功率监测

为解决磨削大型零件时进刀不均匀、效率低的问题,以轧辊磨削为例,对比CBN砂轮和氧化铝砂轮的主轴功率和加工性能。发现:由于砂轮磨损,轧辊磨削的效率及尺寸精度低;相同条件下,树脂结合剂CBN砂轮的效率比氧化铝砂轮高150%;去除同样轧辊材料时,CBN砂轮的磨损量最多是氧化铝砂轮的1/9。CBN砂轮由于磨粒硬度高、把持力强,可以改善大型零件加工时进刀不均匀、效率低的情况。