نتایج جستجو برای: bci

تعداد نتایج: 3790  

سیستم‌های BCI مبتنی­بر SSVEP به­دلیل مزایایی چون سرعت انتقال اطلاعات بالا، نسبت بالای سیگنال به نویز و راحتی کاربران در استفاده از آن‌ها، توجه بسیاری از محققان را به خود جلب کرده­اند. هدف پردازشی در این سیستم‌ها، شناسایی فرکانس ظاهر­شده در سیگنال EEG کاربر است. از میان روش‌های پردازشی مختلفی که برای شناسایی فرکانس در سیستم‌های BCI مبتنی­بر SSVEP استفاده می­شوند، روش LASSO با استقبال فراوانی همر...

The aim of this paper is to introduce the notions of ($epsilon, epsilon vee q$)-fuzzy p-ideals, ($epsilon, epsilon vee q$)-fuzzy q-ideals and ($epsilon, epsilon vee q$)-fuzzy a-ideals in BCIalgebras and to investigate some of their properties. Several characterizationtheorems for these generalized fuzzy ideals are proved and the relationshipamong these generalized fuzzy ideals of BCI-algebras i...

In this study, a novel control algorithm, based on a P300-based brain-computer interface (BCI) is fully developed to control a 2-DoF robotic arm. Eight subjects including 5 men and 3 women perform a 2-dimensional target tracking in a simulated environment. Their EEG (Electroencephalography) signals from visual cortex are recorded and P300 components are extracted and evaluated to perform a real...

Journal: :NeuroImage 2014
Vera Kaiser Günther Bauernfeind Alex Kreilinger Tobias Kaufmann Andrea Kübler Christa Neuper Gernot R. Müller-Putz

The present study aims to gain insights into the effects of training with a motor imagery (MI)-based brain-computer interface (BCI) on activation patterns of the sensorimotor cortex. We used functional near-infrared spectroscopy (fNIRS) and electroencephalography (EEG) to investigate long-term training effects across 10 sessions using a 2-class (right hand and feet) MI-based BCI in fifteen subj...

2007
Theodore W. Berger John K. Chapin Greg A. Gerhardt Dennis J. McFarland José C. Principe Walid V. Soussou Dawn M. Taylor Patrick A. Tresco

Brain-computer interface (BCI) research deals with establishing communication pathways between the brain and external devices. BCI systems can be broadly classified depending on the placement of the electrodes used to detect and measure neurons firing in the brain: in invasive systems, electrodes are inserted directly into the cortex; in noninvasive systems, they are placed on the scalp and use...

Journal: :Clinical EEG and neuroscience 2015
Kai Keng Ang Karen Sui Geok Chua Kok Soon Phua Chuanchu Wang Zheng Yang Chin Christopher Wee Keong Kuah Wilson Low Cuntai Guan

Electroencephalography (EEG)-based motor imagery (MI) brain-computer interface (BCI) technology has the potential to restore motor function by inducing activity-dependent brain plasticity. The purpose of this study was to investigate the efficacy of an EEG-based MI BCI system coupled with MIT-Manus shoulder-elbow robotic feedback (BCI-Manus) for subjects with chronic stroke with upper-limb hemi...

Brain-Computer Interfaces (BCIs) are communication systems, which enable users to send commands to computers by using brain activity only; this activity being generally measured by Electroencephalography (EEG). BCIs are generally designed according to a pattern recognition approach, i.e., by extracting features from EEG signals, and by using a classifier to identify the user’s mental state from...

2015
Felix Gembler Piotr Stawicki Ivan Volosyak

Brain-Computer Interfaces (BCIs) transfer human brain activities into computer commands and enable a communication channel without requiring movement. Among other BCI approaches, steady-state visual evoked potential (SSVEP)-based BCIs have the potential to become accurate, assistive technologies for persons with severe disabilities. Those systems require customization of different kinds of para...

Journal: :Frontiers in Human Neuroscience 2021

In a Mental Imagery Brain-Computer Interface the user has to perform specific mental task that generates electroencephalography (EEG) components, which can be translated in commands control BCI system. The development of high-performance MI-BCI requires long training, lasting several weeks or months, order improve ability manage his/her tasks. This works aims present design combining imaginary ...

2013
Ilya P. Ganin Sergei L. Shishkin Alexander Y. Kaplan

Brain-computer interfaces (BCIs) are tools for controlling computers and other devices without using muscular activity, employing user-controlled variations in signals recorded from the user's brain. One of the most efficient noninvasive BCIs is based on the P300 wave of the brain's response to stimuli and is therefore referred to as the P300 BCI. Many modifications of this BCI have been propos...

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