Dissertation > Excellent graduate degree dissertation topics show

The SSVEP Online System Based on Multiple Frequencies Sequential Coding

Author: HuJun
Tutor: YaoDeZhong
School: University of Electronic Science and Technology
Course: Biomedical Engineering
Keywords: SSVEP online system MFSC frequency selection idle detection
CLC: TN911.7
Type: Master's thesis
Year: 2013
Downloads: 14
Quote: 0
Read: Download Dissertation

Abstract


Due to the high stability and signal-to-noise ratio (SNR), Steady state visualevoked potential (SSVEP) has attracted much attention in brain computer interface (BCI)discipline. However, because of the limitations of human physiology and hardware, thestimulus frequency that can effectively induce SSVEP response is very limited, resultingin the target number encoded by SSVEP cannot meet the requirements of practicalapplication. Meanwhile, both the difference of individual preference to frequencystimuli and the discomfort caused by the long flash stimulus hamper the practicalapplication of SSVEP based BCI. The work in this dissertation mainly focuses on thespecific SSVEP BCI online systems to partially the above problems for SSVEP BCI.The main contribution of this dissertation includes:1. Based on the temporal frequency coding protocol, the number of coding target isdramatically increased, which can satisfy the practical requirements for more targetscoding with a small number of frequencies.2. An module is embedded into online system to optimize the preferred frequenciesfor individual subject, which can provide the best frequencies to evoke the high SNRSSVEP.3. According to the response thresholds determined by the selected frequencies, theidle detection is newly introduced into online system, aiming to reliably discern the taskand non-task. This additional function can effectively lower the fatigue burden ofsubjects, and improve the practical merits of BCI system.4. As for stimulus module, the DirectX is specifically used to guarantee theaccurate control for frequency stimulus. The multi-thread technique is adopted to realizethe online processing, and the output is unified to facilitate the flexible application andextension of the online system in future.The online system with above mentioned features has been used to the practicalapplications including the control of virtual man, robot, etc. The exhibitions of thesystem on various actual circumstances prove the reliability and feasibility of thedeveloped system.

Related Dissertations

  1. Research of Multimedia Concordance on Line System to Enhance College English Colloquial Comprehension,H319
  2. Consultation Service Hot-line System for Foreign Trade Enterprises,TP311.52
  3. Network welfare lottery Accounting System Design and Implementation,TP311.52
  4. Based on. NET Xinjiang News Online System Design and Implementation,TP311.52
  5. High sensitivity wireless control timing receiver with AGC,TN851
  6. Research on Rources Allocation Mechanism for WiMAX System,TN925
  7. Design and Research of Brain-computer Interface System Based on Steady-state Visual Evoked Potential,TP11
  8. Handan pedestrian use online system to improve work skills Organizational Performance Case Study,F832.2
  9. Steady - state visual evoked response detection technology and application,R77
  10. Study on Supervision System for Bonded Processing Enterprise and Custom and Its Application,TP311.52
  11. The Design and Realization of Enterprise Online System Backup and Restore,TP309.3
  12. EEG -based brain - computer interface research online system,R319
  13. Following the regional power grid verification Baoding value analysis system for practical research,TM77
  14. Travel online peer system analysis,F590
  15. Turbine Rotor Based on Finite Element low cycle fatigue life prediction and reliability of the online system,TK263
  16. Source Code Online Judging Based on Black-Box Testing,TP311.11
  17. Subcritical steam turbine rotor life and online Management System,TK263
  18. Study and Design of Test Online System for EBLCU,G434
  19. Based online analysis system . Net framework,TP311.52
  20. The Parameters Optimization of Eddy Current Testing for Tubes Based on Finite Element Analysis,TG115.28
  21. A Study on Brain Computer Interface Based on the Steady-State Visual Evoked Potential Phase,R318.0

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication theory > Signal processing
© 2012 www.DissertationTopic.Net  Mobile