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A polarization converter (PC) based on the mode coupling in a hybrid plasmonic waveguide (HPW) is proposed. This PC comprises a Si core, a low index insulator layer surrounding the Si core, and two asymmetrically arranged Ag strips. Two orthogonal hybrid polarization modes are excited within the low index insulator layer. By exploiting the mode characteristics of these two hybrid polarization modes,...
Given the ever-expanding scale of WiFi deployments in metropolitan areas, we have reached the point where accurate GPS-free outdoor localization becomes possible by relying solely on the WiFi infrastructure. Nevertheless, the existing industrial practices do not seem to have the right implementation to achieve an adequate accuracy, while the academic researches that are mostly attracted by indoor...
Recently, network traffic keeps growing rapidly. How to efficiently and securely deliver huge volume of data to multiple devices is a challenging problem. Linear network coding (LNC) is a technique which can be used to improve network throughput, efficiency and security. In this paper, we investigate the secure multicast with multiple streams (SMMS) problem. Specifically, we jointly consider the rate...
Linear network coding (LNC) is a promising technology that can increase network throughput, improve transmission robustness and provide data confidentiality. In this paper, we investigate the optimal transmission topology construction and LNC design for secure multicast, i.e., the Integer Secure Multicast (ISM) problem. The ISM problem aims to find the transmission topology with integral link rates...
A novel near-infrared light emitting diode (LED) array based on ordered Si micropillar/InGaZnO-nanofilm heterojunctions was proposed and demonstrated. The pixel resolution of the LED array is 4,885 dpi, corresponding to a pixel pitch of 5.2μm. The fabricated LED array shows good rectification characteristics with small serial resistance. Carrier transport obeys the trap-charge-limited current model...
This paper proposes a new method of inter prediction based on low-rank matrix completion. By collection and rearrangement, image regions with high correlations can be used to generate a low-rank or approximately low-rank matrix. We view prediction values as the missing part in an incomplete low-rank matrix, and obtain the prediction by recovering the generated low-rank matrix. Taking advantage of...
Automatic human action recognition has been a challenging issue in the field of machine vision. Some high-level features such as SIFT, although with promising performance for action recognition, are computationally complex to some extent. To deal with this problem, we construct the features based on the Distance Transform of body contours, which is relatively simple and computationally efficient,...
How to recognize human action from videos captured by modern cameras efficiently and effectively is a challenge in real applications. Traditional methods which need professional analysts are facing a bottleneck because of their shortcomings. To cope with the disadvantage, methods based on computer vision techniques, without or with only a few human interventions, have been proposed to analyse human...
To trace and track enterprise assets (man, machine, materials and orders), record and carry real-time, accurate, complete and consistent shop-floor data, an effective wireless network communication method based on 433 MHz is proposed in this paper. The needed network equipments, network architecture and some examples are also introduced. Application results show that it is a very effective method...
The core property of optical devices is its high nonlinearity, which will play an important role in the future optical communications. The advent of nano-technology, have paved a way for researchers to invent a novel optical fibre by combining the technologies of optical fibre and nano-technologies. In this paper, we present a manufactural method of this novel optical fibre. In addition, we conduct...
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