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In this paper, we propose a systematic design approach of polar codes for multicolor visible light communication (VLC). Owing to the mixed ratio of multicolor light intensities and the interference between different colors, the channel polarization over a multicolor VLC system is markedly different from that over a uniform channel. Our scheme quantifies these different color channels and constructs...
This paper presents a novel method for quantitative and objective diagnoses of Autism Spectrum Disorder (ASD) using eye tracking and deep neural networks. ASD is prevalent, with 1.5% of people in the US. The lack of clinical resources for early diagnoses has been a long-lasting issue. This work differentiates itself with three unique features: first, the proposed approach is data-driven and free of...
A universal design methodology for inter-leavers in bit-interleaved coded modulation (BICM) systems deploying binary irregular quasi-cyclic low-density parity-check (QC-LDPC) codes and higher-order modulation is presented. The interleaver is introduced to lower decoding threshold when higher-order modulation is adopted. For this purpose, an optimization procedure with modified numerical analysis as...
This paper proposes a neural network (NN) approach for demodulating output signals of a nonlinear channel with memory. The feed-forward neural network is trained to learn the appropriate mapping between nonlinear input patterns and source bits. The simulation results provide some evidence that neural networks can learn the effect of nonlinear channels with memory and demodulate the output signal of...
When looking at an image, humans shift their attention towards interesting regions, making sequences of eye fixations. When describing an image, they also come up with simple sentences that highlight the key elements in the scene. What is the correlation between where people look and what they describe in an image? To investigate this problem, we look into eye fixations and image captions, two types...
Previous works have suggested the role of scene information in directing gaze. The structure of a scene provides global contextual information that complements local object information in saliency prediction. In this study, we explore how scene envelopes such as openness, depth, and perspective affect visual attention in natural outdoor images. To facilitate this study, an eye tracking dataset is...
Our goal is to automatically detect which direction a child is facing based on a single, simple overhead picture, and track that direction across time. Engaging in joint attention, which is the shared focus of two individuals on some object of interest, is a strong cue of typically developing children, and the lack thereof can be an indicator of autism spectrum disorder or other pervasive developmental...
An integral equation with non-conformal and non-overlapping domain decomposition method has aroused wide interest in the engineering community. The contribution of this paper is twofold: (I) In the framework of IE-DDM, phase-extracted (PE) basis function is employed to reduce the required number of unknowns in the large and smooth sub-domain. (II) A reverse operation self-consistent evaluation (ROSE)...
In this paper, a surface integral equation domain decomposition method (SIE-DDM) with phase extracted (PE) basis function is presented for the solution of electrically large problems. This kind of basis functions with the traveling wave variation can be defined on the relative large grids. so they are suitable for the decomposed smooth large subdomains to further reduce the required number of unknowns...
With the rapid development of electronic devices. There are more and more high performance, multi-functional electronic components, at the same time, their size is getting smaller and smaller. This demand has a greatly promoted the development of electronic packaging. Due to the precision of electronic devices, leading to a sharp increase in the current density through the lead wire, can reach the...
Traditional artificial fish swarm algorithm (AFSA) can be affected by visual field parameters, and the step size of the artificial fish also constrained the performance. The step size of the artificial fish is fixed and it can affect the global search speed of the algorithm. So, a kind of logarithmic function adaptive artificial fish swarm algorithm (ALF-AFSA) is proposed. Based on the weighted average...
This work presents Land Surface Temperature (LST) retrieval from Landsat-8 data using the Generalized Split-Window (GSW) algorithm. First, radiative transfer modeling experiments were conducted using the moderate spectral resolution atmospheric transmittance algorithm and computer model (MODTRAN) 4.0 fed with SeeBor V5.0 atmospheric profile database to simulate the brightness temperatures in Thermal...
This paper addresses the intercalibration of the infrared channels 7∼16 of Advanced Himawari-8 Imager (AHI8) against the hyperspectral channels of Infrared Atmospheric Sounding Interferometer (IASI) on Metop-B using the hyperspectral convolution method. Matching measurements in July of 2016 were collected over a tropical area (100° E∼180 ° E, 10 ° S∼ 10 ° N) with collocation, absolute observation...
During the process of accuracy evaluation of transfer alignment, since the parameters of the Inertial Navigation System (INS) model usually have some deviations from that of the actual physical process, and the noise statistic characteristic is not exactly known and the equipment environment in the evaluation process affects the results, the normal Kalman filter may behave badly or diverge and we...
Device-to-device (D2D) multicast retransmissions in cellular networks helps to improve spectral efficiency and to offload traffic. Existing methods have revealed the relationship between the number of relays and resource utilisation efficiency on retransmissions in terms of relay selection and clustering. However, few studies consider the impact from the lost packets on resource utilisation, which...
Indoor location based service (LBS) has become one of the key enablers for the mobile internet era. The challenging indoor localisation problem may be solved by the emerging visible light positioning (VLP) techniques which exploit light-emitting diode (LED) to transmit beacon signals. In this paper, we propose a general VLP system which invokes an imaging receiver, an off-the-shelf LED lamp and a...
In this paper, we present a new equalizer based on probabilistic neural networks (PNN) for visible light communication (VLC) systems. While traditional artificial neural networks (ANN) type equalizers have to identify the distribution of the received signal, in our method kernel density estimation (KDE) is exploited to obtain the probability density function (PDF) of the states of the received signal,...
Snippets of logging code are output statements (e.g., LOG.info or System.out.println) that developers insert into a software system. Although more logging code can provide more execution context of the system's behavior during runtime, it is undesirable to instrument the system with too much logging code due to maintenance overhead. Furthermore, excessive logging may cause unexpected side-effects...
Assessing how large-scale software systems behave under load is essential because many problems cannot be uncovered without executing tests of large volumes of concurrent requests. Load-related problems can directly affect the customer-perceived quality of systems and often cost companies millions of dollars. Load testing is the standard approach for assessing how a system behaves under load. However,...
Large-scale software systems like Amazon and healthcare.gov are used by thousands or millions of people every day. To ensure the quality of these systems, load testing is a required testing procedure in addition to the conventional functional testing techniques like unit and system integration testing. One of the important requirements of load testing is to create a field-like test environment. Unfortunately,...
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