SmartRolling: A human–machine interface for wheelchair control using EEG and smart sensing techniques     

《Information processing & management》2023,60(3):103262

Smart wheelchairs based on brain–computer interface (BCI) have been widely utilized recently to address certain mobility problems for people with disability. In this paper, we present SmartRolling, an intuitive human–machine interaction approach for the direct control of robotic wheelchair that jointly leverages EEG signals and motion sensing techniques. Specifically, SmartRolling offers two wheelchair-actuation modes for users with different physical conditions: (1) head motion only — people who are severely disabled but able to do basic tasks using eyes and head, and (2) head and hands motion — in addition to type 1, people who can use functioning hands/arms for extra tasks. The system issues operation commands by recognizing different EEG patterns elicited by motor execution (ME) tasks including eye blink, jaw clench, and fist open/close, while at the same time estimates users’ steering intentions based on their facing direction by leveraging inertial measurements and computer vision techniques. The experiment results demonstrate that the proposed system is robust and effective to meets the individual’s needs and has great potential to promote better health.  相似文献   

Complex phonological tasks predict reading in 7 to 11 years of age typically developing Russian children     

Svetlana V. Dorofeeva  Anna Laurinavichyute  Victoria Reshetnikova  Tatyana V. Akhutina  Wim Tops  Olga Dragoy 《Journal of Research in Reading》2020,43(4):516-535

  相似文献   

一种在轨海上多运动舰船目标检测和跟踪方法     

矫腾章  胡玉新  吕鹏  张凯  台宪青 《中国科学院大学学报》2020,37(3):368-378

传统遥感卫星图像处理采用在地面进行目标检测和跟踪处理的模式，卫星将拍摄到的图像数据下传至地面数据处理中心，由地面数据处理系统对接收到的遥感图像数据进行目标检测和跟踪。然而，随着遥感图像分辨率的不断提高，需要下传的数据量增大，导致星地数据传输的时间大大增加，最终造成目标检测和跟踪的时效性降低。针对上述问题，提出一种基于多特征量判别的Canny边缘检测和联合概率数据关联的在轨海上多运动舰船目标检测和跟踪方法。将该方法利用中国科学院微小卫星创新研究院的高分微纳卫星实测数据在模拟星载的嵌入式开发平台上进行验证，结果表明该方法能够在轨对海上多运动舰船目标进行快速、准确的检测和跟踪。  相似文献   

基于系统动态学方法的弱信号生命周期建模与仿真     

董尹  刘千里  宋继伟 《图书情报工作》2019,63(13):75-84

[目的/意义]为增强弱信号的内涵研究，对其全生命周期过程下的各阶段要素以及要素间的联系进行探寻，以期获得一定程度上的理论贡献，同时也为相关组织在开展弱信号管理实践时提供理论指导。[方法/过程]在对弱信号概念研究现状进行梳理的基础上，结合意义构建理论给出了弱信号概念界定。随后，通过与信息生命周期、新兴议题生命周期进行类比，提出弱信号生命周期理念。进而采用系统动态学方法开展系统思考，使用因果回路图进行系统建模，运用存量流量图进行仿真模拟。[结果/结论]弱信号生命周期包含4个阶段：侦测、关联、传递、抉择，相应的系统动态学模型所具备的现实性得到验证，且通过情景模拟确认了4个关键辅助变量：外界噪声干扰程度、弱信号分析效率、组织内相互信任程度、决策者信任程度。在整体研究的基础上，给出弱信号管理过程中可能会遇到的障碍以及应对策略。  相似文献   

Word sense disambiguation based on context selection using knowledge-based word similarity     

Sunjae Kwon  Dongsuk Oh  Youngjoong Ko 《Information processing & management》2021,58(4):102551

In this paper, we introduce a novel knowledge-based word-sense disambiguation (WSD) system. In particular, the main goal of our research is to find an effective way to filter out unnecessary information by using word similarity. For this, we adopt two methods in our WSD system. First, we propose a novel encoding method for word vector representation by considering the graphical semantic relationships from the lexical knowledge bases, and the word vector representation is utilized to determine the word similarity in our WSD system. Second, we present an effective method for extracting the contextual words from a text for analyzing an ambiguous word based on word similarity. The results demonstrate that the suggested methods significantly enhance the baseline WSD performance in all corpora. In particular, the performance on nouns is similar to those of the state-of-the-art knowledge-based WSD models, and the performance on verbs surpasses that of the existing knowledge-based WSD models.  相似文献   

基于图像处理的工件检测     

吴霆 《广东轻工职业技术学院学报》2011,10(2):18-21

研究了基于图像处理的工件轮廓检测技术的流程及算法,通过图像滤波、图像增强、阈值分割、边缘检测、边缘定位和参数测量及拟合等一系列算法,可以测出被检测工件是否符合要求及其误差范围。  相似文献   

高职科研在专业建设中的作用     

田红侠  徐百平  王玫瑰  李建钢  颜倩 《广东轻工职业技术学院学报》2011,(4):46-49

以广东轻工职业技术学院高分子材料加工技术专业为例,分析了高职院校开展科研工作在专业建设中所起的作用。科研对于专业的可持续发展,师资水平的提高以及专业对外服务能力的提升起到重要推动作用。同时,也分析了目前高职院校开展科研工作的不利因素。  相似文献   

基于线阵CCD的车轮表面缺陷检测系统的图像预处理研究     

吴海滨  夏需堂 《巢湖学院学报》2011,13(3):61-67

介绍了车轮表面缺陷在线检测系统的工作原理和结构组成,对荧光磁粉的激发光谱和发射光谱以及UV(紫外)LED的发光特性进行了分析和研究,重点介绍了缺陷检测系统的数字图像处理和模式识别技术。经过高精度线阵CCD提取的检测图像,通过采用图像增强、平滑去噪、边缘提取以及二值化等方法,可以有效的识别出可疑的缺陷,完成缺陷在线检测系统的识别报警等。  相似文献   

Position Sensorless Control for Permanent Magnet Synchronous Motor Using Sliding Mode Observer     

陈益广  傅涛李响 《天津大学学报(英文版)》2005,11(5):338-342

An approach of position sensorless control for permanent magnet synchronous motor （ PMSM ） is put forward based on a sliding mode observer. The mathematical model of PMSM in a stationary αβ reference frame is adopted, and the system is controlled by the digital signal processor （ DSP; TMS320LF2407 according to the control achieve closed loop operation of the motor, the stator theory of sliding mode observer. In order to magnetic field should be vertical with the rotor magnetic field and be synchronous with rotor rotating, so the position and speed of PMSM is estimated in real time and the estimated position is modified continuously. The simulation results indicate that the proposed observer has high precision is more robust to the parametric variation and load in estimation of PMSM position and speed, and torque disturbance.  相似文献   

车牌识别技术中字符切割新算法     

李元金  高维春  王精明 《深圳信息职业技术学院学报》2007,5(1):32-34

先对切割下来的车牌进行水平扫描,确定车牌上文字在水平上的大致范围;然后再对确定水平范围后的车牌图像进行竖直扫描确定车牌上每个字符的大致宽度;最后把它们切割下来并进行归一化处理,为下一步车牌特征提取打下了基础。实验结果的数据表明该方法对车牌上字符的切割具有很好的效果。  相似文献