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It is commonly believed that brain has faster reaction speed and higher reaction accuracy on visual-auditory bimodal stimuli than single modal stimuli in current neuropsychological researches, while visual-auditory bimodal stimuli (VABS) do not show corresponding superiority in BCI system. This paper aims at investigating whether semantically congruent stimuli could also get better performance than...
EEG-based emotion recognition has received increasing attention in the past few decades. The frequency components that give effective discrimination between different emotion states are subject specific. Identification of these subject-specific discriminative frequency components (DFCs) is important for the accurate classification of emotional activities. This paper investigated the potential of adaptive...
Behavior or human action recognition is one hot research topic in real-time video surveillance system. Dangerous accidents consist of dangerous actions by one or more persons. Thus, action recognition is very important for dangerous accident recognition. If videos captured by public cameras especially dangerous actions related videos can be processed and analyzed immediately to provide an early and...
EEG-based BCI (brain-computer-interface) speller, especially gaze-independent BCI speller, has become a hot topic in recent years. It provides direct spelling device by non-muscular method for people with severe motor impairments and with limited gaze movement. Brain needs to conduct both stimuli-driven and stimuli-related attention in fast presented BCI paradigms for such BCI speller applications...
Three waveguide band-pass filters are designed based on three different resonant cavity structures, operating at WR-2.2 (0.33∼0.5THz), WR-1.5 (0.5∼0.75THz) and WR-1.0 (0.75∼1.1THz) frequency band separately. Terahertz filters are all fabricated using the deep reactive ion etching (DRIE) silicon micromachining technique. For more accurate designs, the conductivity of the metal film with the roughness...
An increasing number of unknown islands, an important resource for human development, is identified based on segmentation of remote sensing image. Different from traditional digital image, remote sensing image has significant characteristics, such as multi-band, multi-source, and multi-granularity. Thus, the segmentation theory based on traditional digital image is not suitable for remote sensing...
JavaScript is a dynamic programming language that has been widely used nowadays. The dynamism has become a hindrance of type analysis for JavaScript. Existing works use either static or dynamic type analysis to infer variable types for JavaScript. Static type analysis of JavaScript is difficult since it is hard to predict the behavior of the language without execution. Dynamic type analysis is usually...
Human motion capture techniques (MOCAP) are widely applied in many areas such as computer vision, computer animation, digital effect and virtual reality. Even with professional MOCAP system, the acquired motion data still always contains noise and outliers, which highlights the need for the essential motion refinement methods. In recent years, many approaches for motion refinement have been developed,...
Concurrent Programs are hard to analyze or debug due to the complex program logic and unpredictable execution environment. In practice, ordinary programmers often adopt existing well-designed concurrency related API (e.g., those in java.util.concurrent) so as to avoid dealing with these issues. These API can however often be used incorrectly, which results in hardto-debug concurrent bugs. In this...
Use cases are widely used to capture user requirements based on interactions between different roles in the system. They are mostly documented in natural language and sometimes aided with graphical illustrations in the form of use case diagrams. Use cases serve as an important means to communicate among stakeholders, requirement engineers and system engineers as they are easy to understand and are...
A thermal sensor based on Fiber Bragg grating (FBG) is designed for online temperature measurement system in oil-immersed transformers. The measurable range is 30 °C to 150 °C, with resolution of 1 °C. Performance of the FBGs has been tested by temperature rising experiment in thermostat and online temperature measuring of transformer windings during short circuit experiment. Transformers equipped...
Electroencephalographic (EEG)-based emotion recognition has attracted increasing attention from the field of human-computer interaction (HCI). However, there are a number of challenges for machines to correctly recognize human emotional states. One problem is how to generalize the emotion model across time, since the brain may show different patterns of EEG for the same emotion experience at different...
Rehabilitation method of motor dysfunction is a challenging issue of neural rehabilitation. Neuromuscular electrical stimulation (NMES) has been frequently used in rehabilitation therapy to improve neural recovery such as stroke and spinal cord injury. Stimulus, acting on sensorimotor neural system components, resulted in the increased cortical excitability which accompanied with motor performance...
The grounding line (GL) is the location where ice sheet lose contact with the bed rock. Since this line is under the surface ice, it's hard to define the GL. However, the different basal condition besides the GL caused different vertical movement and a flexure is often formed at the GL. This flexure is detectable by optical images. Meanwhile the ocean-induced vertical movement is detectable by repeat...
A low-loss suspended silicon waveguide is presented, operating at the WR-1.5 frequency band (500–750GHz). A rectangular silicon strip is the main transmission channel. Two groups of silicon gratings are designed for holding up the rectangular silicon channel. The proposed waveguide is fabricated using the deep reactive ion etching (DRIE) micromachining technique due to its highly accurate dimensional...
This paper presents a novel tunable waveguide bandpass filter by using microelectromechanical (MEMS) technology. The movable element driven by the U-shape electrothermal microactuator can perturb the electromagnetic distribution of the resonator and change its resonance frequency. The designed three-pole tunable rectangular waveguide bandpass filter using three tuning elements operating at 279.4 GHz...
In this paper, a novel deployable cable net antenna supporting mechanism is presented and the detailed nonlinear static mechanic performance of the proposed mechanism is analyzed. By observing that the static structure of cable net system is easily influenced by the randomly external force in the actual space environment, the finite element static model of the cable net structure based on the principle...
A WR-1.0 waveguide band-pass filter is designed and fabricated using the deep reactive ion etching (DRIE) micromachining technique. The metal conductivity is investigated for more accurate designs. Because the influence of the fabrication tolerance on the component performance cannot be negligible while the frequency increases, it is a necessary to adopt the simple structure with less resonant cavities...
An effective imaging approach based on compressed sensing (CS) and fast iterative shrinkage-thresholding algorithm (FISTA) is proposed to realize the two-dimensional imaging in the single-input multiple-output (SIMO) radar system. In comparison with the traditional imaging method based on matched filtering, considerable simplification of the hardware structure would come true through the implementation...
In this paper, an improved algorithm for 3D SLAM is presented. A data dimensional reduction algorithm—Principal Component Analysis (PCA) is adopted, so as to speed up the rate of feature extraction from RGB-D images(640×480). To overcome the poor efficiency performance on the original RGB-D SLAM, a novel memory management algorithm and an incremental appearance-based loop closure detector are used...
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