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Multi-person pose estimation in the wild is challenging. Although state-of-the-art human detectors have demonstrated good performance, small errors in localization and recognition are inevitable. These errors can cause failures for a single-person pose estimator (SPPE), especially for methods that solely depend on human detection results. In this paper, we propose a novel regional multi-person pose...
In this paper, we provide an insight of visual saliency modeling from the perspective of simulating visual information manipulation process in human vision system. For humans, visual stimuli are converted into spike trains by retina, and the spike signals are then transferred to brain areas for further analysis. Therefore, we propose to estimate image saliency based on a retina neural network, which...
In this work, a three-dimensional (3D) simultaneous arbitrary-way orbital angular momentum (OAM) generator is presented. The proposed generator is constructed by a group of transformation cylinders filled with metamaterials. Using transformation cylinders, arbitrary-way planar wave fronts can be simultaneously converted to helical wave fronts with arbitrary topological charges. Firstly, the principle...
Multiple-input multiple-output (MIMO) techniques take advantage of transmitting multiple data streams at the transmitter simultaneously to increase the spectrum efficiency. However, it is difficult for the newly emerging spatial modulation (SM) MIMO techniques to transmit multiple data streams directly, because of the multi-signal confliction problem. In this paper, we present a new multi-stream space...
In the past decades, hundreds of saliency models have been proposed for fixation prediction, along with dozens of evaluation metrics. However, existing metrics, which are often heuristically designed, may draw conflict conclusions in comparing saliency models. As a consequence, it becomes somehow confusing on the selection of metrics in comparing new models with state-of-the-arts. To address this...
Transform domain communication system (TDCS) is a multi- carrier cognitive radio (CR) technique which uses cyclic code shift keying (CCSK) for overlay opportunistic spectrum access. Specifically, at any given time, a TDCS system cyclically shifts a fundamental modulation waveform (i.e., a CR sequence satisfying a dynamic spectrum hole constraint) according to specific input data symbol. In practical...
In this paper, an intelligent SCORM-based e-learning system, SELS (abbreviation of SCORM-based E-Learning System) was designed and implemented for a multinational enterprise (MNE). The main purpose of the SELS was to integrate all affairs for training employees and managing curriculums. The proposed SELS contains five sub-systems including curriculum registering, online learning, enterprise document...
Space shift keying (SSK) modulation is an emerging transmission technique for multiple-input multiple-output (MIMO) wireless channels that exploits spatial domain to convey information. In this paper, we present a layered space shift keying (LSSK) modulation scheme to fully exploit spatial domain to transmit information bits, where a layered architecture is developed to achieve spatial multiplexing...
Space shift keying (SSK) modulation is a newly emerging transmission technology for multiple-input multiple-output (MIMO) wireless systems. In this paper, we propose a novel high rate transmit diversity assisted space shift keying (HT-SSK) modulation scheme to achieve the transmit diversity gain over SSK system with high spectrum efficiency. We first apply antenna shift method at each time slot to...
In this paper, we consider a blind interference alignment (BIA) based coordinated multi-point transmission and reception (CoMP) scheme in downlink MIMO system. The proposed scheme is able to mitigate the inter-channel interference (ICI) from adjacent cell effectively without feedback channel state information (CSI) to the base stations. The transmitter achieves blind interference alignment among two...
In cognitive radio (CR) systems, the spectrum opportunity is defined as spectrum holes which are not occupied by primary users. When existing sequence sets are spread over the available spectrum bands, their corresponding frequency-domain sequences have to be set to zero in order to satisfy the spectrum hole constraint, leading to damaged correlation properties. In this paper, a novel sequence design...
Previously, we proposed a topological-based swarming model in which agents probabilistically decide which other agents to interact with based on the proximity of positions of agents. Agents then average their direction with the directions of the agents they have interacted with. In this paper, we improve the model mentioned-above by taking the influence of similarity of directions into consideration,...
Block diagonalization (BD) is a well-known linear precoding scheme for multi-user multiple-input multiple-output (MU-MIMO) downlink transmission. BD precoding achieves good performance but results in high computational complexity overheads due to two singular value decomposition (SVD) operations for each user. By replacing the first SVD operation with a less complex solution, the QR decomposition...
In a recent PNAS article, Ballerini et al. provided evidence that birds in flocks interact with a fixed number of nearest neighbors, rather than with all neighbors within a fixed metric distance, as most previous models assumed. They also conducted numerical simulations to show that interacting with a fixed number of nearest neighbors achieved significantly higher cohesion of the aggregation compared...
A new approach to obtain real-time positions of fiducial markers in MV treatment beam images is proposed. The MV images are firstly preprocessed to enhance contrast in the treatment field. To deal with large variations in projected marker shape, we propose a learning-based approach to detect marker locations in the enhanced MV images. We also show that marker tracking can be accomplished much more...
People tend to get motion sickness on a moving boat, train, airplane, car, or amusement park rides. Many previous studies indicated that motion sickness sometimes led to traffic accidents, so it becomes an important issue in our daily life. In this study, we designed a VR-based motion-sickness platform with a 32-channel EEG system and a joystick which is used to report the motion sickness level (MSL)...
Based on the perspective of low-carbon, the paper analyzes three main influential factors of the low-carbon performance of China's manufacturing green innovation system, including low-carbon innovation ability of manufacturing green innovation system, low-carbon industry upgrading of manufacturing and low-carbon benefits of manufacturing. And then the paper takes China's manufacturing annual statistical...
The design of loop filter is very important in GNSS receivers. According to design methodology and filter coefficient calculation method, the performance of four filter design methods are analyzed and discussed for frequency response, loop bandwidth and noise equivalent bandwidth. The range of BNT in different methods and deviation of ideal noise equivalent bandwidth are investigated by simulation...
Motion sickness occurs when the brain receives conflicting sensory information from body, inner ear and eyes [1]. In some cases, a decreased ability to actively control the body's postural motion also causes motion sickness [2][3]. Many previous studies have indicated that motion sickness had negative effect on driving performance, and sometimes lead to serious traffic accidents due to self-control...
It is very important to reduce the possibility of spatial disorientation because spatial disorientation is a major cause of aircraft crashes. In this research, we assess the effect of transcutaneous electrical nerve stimulation (TENS) on spatial cognitive function by measuring physiological signals, including brain waves measured by electroencephalography (EEG). Through physiological signals such...
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