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A novel multipath mitigation algorithm for multiplex binary offset carrier (MBOC) signals in the Global Navigation Satellite System (GNSS) is presented. Based on the W2 code correlation reference waveform (CCRW) structure, a series of bipolar reference waveform (BRW) are introduced to shape the unambiguous s-curve. The shaped s-curve has a single stable zero-crossing point, and the problem of unambiguous...
This paper investigates the perceptual confusion pattern in the three coda nasals /-m, -n, -η/ in Southern Min for insight into the effect of tone on the identification of nasal place of articulation. A general hierarchy of perceptual confusability - m>-η>-n was found in the current set of data, which is compatible with the fact that /-m/ was lost first in the historical merger of coda nasals...
For a given energy deposited, the Fano factor of a scintillator is defined as the ratio of the variance of the number of scintillation photons to the mean number of scintillation photons. Correlations in time between the signals from two photomultiplier tubes collecting light from the same scintillation event were used to estimate the Fano factor of scintillators. At 662 KeV, LaBr3:Ce was found to...
For porous materials such as cancellous bones, a digital image correlation (DIC) method was used in the deformation measurement. Directly using microstructural or texture features instead of artificial speckle marks, an algorithm routine of DIC deformation measurement was programmed with MATLAB. The deformation analysis program was firstly tested with simulative speckle images, then the whole scheme...
Sign language plays an important role in communication in hard-of-hearing community. Hand gesture recognition is an issue which is being researched widely. In this paper, we propose an approach, which can perform in real-time, to solve such problem for Vietnamese sign language. Instead of RGB data as many other solutions, the input of our system is depth images captured by Microsoft Kinect. We also...
We investigated effective features for human detection. The histogram of oriented gradients (HOG), which was proposed by N. Dalal, is an important representation that accumulates the edge-magnitude into a quantized histogram. Effective features similar to the HOG have been proposed. We question what the most effective feature is. We thus evaluate several features on three datasets of pedestrians,...
Shapelet is a fragment of a time series that can be used to represent class characteristics of the time series. Its application in time series classification is extensively discussed and many improvements have been made. One of them is to separate the construction of classifier from shapelet selection process which is called shapelet transformation. It is more flexible and provides us with more freedom...
This study aims at minimizing the acoustic noise from a magnetic origin of a claw-pole alternator. This optimization is carried out through a multiphysic simulation which includes the computation of magnetic forces, vibrations and the resulting noise. Therefore, a mechanical model of the alternator has to be developed to determine its main modes. Predicted modal parameters are checked against experimental...
This paper introduces a Fresnel-like reflector antenna design producing high-order Orbital Angular Momentum states. This design is referred to as a Fresnel-like reflector because the typical surface discontinuity corresponding to the wrapped phase is only applied to the helical shaping and not to the basic parabolic shape so as to maintain broad band operation. This approach is found to provide stronger...
As different faces have different features, the degree of memorability of faces are different, which are named memorability in this paper. We mainly study the relation between the memorability and different features such as the geometrical features of the faces, the location of eyes, the size of mouth and eyes and the Histogram of Oriented Gradient (HOG). We use SVR model to regress the features of...
The dynamic behavior of large interconnected power systems can be provided by wide-area measurement systems. Motivated by this, the use of on-line techniques has been developed, as well as multivariate methods have been proposed to extract useful patterns from a large data set. In this paper, a multivariable technique to identify and extract dynamic patterns from simultaneously measured data is proposed...
The purpose of this experimental study is to elucidate how is the expression of illustrations giving a positive impression from the viewpoints of impression evaluation and psychophysiological indices. The experiment is carried out to explore the relationship between impression evaluation and psychophysiological indices obtained from biological signals. We analyze the latency and amplitude of EEG event-related...
In this paper, we address the problem of human pose estimation through a novel articulated Gaussian kernel correlation function which is applied to human pose tracking from a single depth sensor. We first derive a unified Gaussian kernel correlation that can generalize the previous Sum-of-Gaussians (SoG)-based methods for the similarity measure between a template and the observation. Furthermore,...
Inter area oscillation in large grid is inherent to a large system. However, it is desirable that these oscillations are adequately damped for a secure and reliable transfer of power. Occurrence of Low Frequency oscillations in inter area range have been observed in the Indian grid after the synchronization of Southern grid with the rest of the Indian grid. These oscillations were generally triggered...
People automatically and quickly judge a facial picture from its appearance. Thus, developing tools that can reproduce human judgments may help consumers in their picture selection process. Previous work mostly studied the position of facial keypoints to make predictions about specific traits: trustworthiness, likability, competence, etc. In this work, high level attributes (e.g. gender, age, smile)...
What are the attributes and features of faces that allow humans or machines to make most reliable inferences from visible to occluded regions of the face, or from shape to texture and vice versa? While both the Human Visual System and many example-based algorithms rely on correlations, these are implicit and difficult to visualize. This paper identifies and visualizes the most reliable correlations...
A new class of multicomponent signals for bandwidth-efficient signaling is proposed in this paper. The multicomponent signal is a sum of its components. Each component is a linearly modulated single-carrier signal with non-overlapping finite length neighboring pulses. We propose using optimal pulse shapes, obtained as a solution of non-linear optimization problem. In this paper we used a criterion...
A reverberation chamber (RC), is an economical facility in EMC, because it allows many directions for illumination an object with a higher field strength compared to conventional techniques, for the same input power. For emission measurements there is no need for moving an antenna. The field uniformity and statistical behaviour of the field are important in a RC. This paper presents an evaluation...
In this paper, we propose a test of hypothesis improvement, by phase study of the analytical cross-correlation function in acoustical detection application. Robustness of false alarms probability for the Time Of Arrival (TOA) estimation represents the goal of the proposed method. After signal detection, TOA will be used to localize one receiver, thanks to a grid of transmitters (more than 3), thanks...
Accurate simulation of sea-clutter is essential to assess the performance of existing target detection schemes and to assist in the development of new ones. A recent simulation technique which captures the evolving Doppler spectrum has been demonstrated in a number of recent publications for both low and high grazing angle data sets. This paper presents empirical models for each of the parameters...
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