The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Ultra-multi-level PAM-SSB-DFTs-OFDM (Single Side Band DFT spreading Orthogonal Frequency Division Multiplexing) was proposed as one of the attractive approaches to achieve higher spectrum efficiency since it has advantages of lower PAPR (Peak to Average Power Ratio) than OFDM and robustness against reference carrier phase error. However, BER performance degradation caused by reference amplitude error...
We present the two-stage optical phase conjugation (OPC) to compensate both dispersion and Kerr nonlinearities in a long-haul 4×56 Gbit/s RZ-DQPSK DWDM transmission system. The two-stage OPC is realized to reduce the amount of unwanted products that are produced through nonlinear mixing processes in third-order nonlinear media. We have investigated the benefit of the two-stage OPC using highly nonlinear...
Spectrum sharing environment permits secondary users (SUs) to utilize radio spectrum of primary users (PUs) but creates cross-interference between SUs and PUs. Moreover, jamming signal is useful in improving information security by deliberately corrupting received signals at eavesdroppers. The current paper presents an analytical framework on communication reliability and information security, which...
In this paper, we present the design of an energy-saving wireless sensor network using ZigBee standard with tree network topology and the frequency band of 2.4 GHz. By choosing low power consumption components, modifying the MAC algorithm and AES cryptography, the proposed network allows users to utilize the power efficiently, provide high level of security and can be applied to a variety of applications.
With the fast increasingly use of image and video processing in many aspects, the requirements for high performance and high-quality systems lead to the use of reconfigurable computing to accelerate traditional image processing platforms. In this work, an efficient runtime adaptable floating-point Gaussian filtering core is proposed to achieve not only high performance and quality but also kernel...
This paper presents the design of a Coarse-grained Reconfigurable Architecture (CGRA), called MUSRA (Multimedia Specific Reconfigurable Architecture). The MUSRA is proposed to exploit multi-level parallelism of the computation-intensive loops in multimedia processing applications. To solve the huge bandwidth requirement of parallel processing arrays, the proposed architecture focuses on the exploitation...
In residential houses, air conditioners consume a lot of electrical energy. In order to improve energy efficiency for residential houses, short-term prediction of energy consumption of air conditioners is required. In this paper, we propose the use of our thermal simulation to simulate the change of room temperature based on weather forecast information and predict the energy consumption of an air...
Histogram of Oriented Gradient (HOG) is a popular feature description for the purpose of object detection. However, HOG algorithm requires a high performance system because of its complex operation set. In HOG algorithm, the cell histogram generation is one of the most complex part, it uses inverse tangent, square, square root, floating point multiplication. In this paper, we propose an accurate and...
We present a model-based testing approach for reactive systems where both test inputs and expected results are generated from ‘restricted’ Event-B specifications. We show that it is possible to automatically build the restricted Event-B specifications from the original ones base on a knowledge base of the system under tests. The restricted models are to reduce the state space of the original Event-B...
The paper presents the design and processing-time evaluation of an embedded system with the purpose for forensic image detection based on the multi-resolution based algorithm. After the success of the proposed method we then successfully implement on the newest version of the hardware Raspberry Pi-3B which is currently a low cost and friendly environment for variously specific-research applications...
Model-based software estimation uses algorithms and past project data to make predictions for new projects. This paper presents a comparative assessment of four modeling approaches, including the original COCOMO, COCOMO calibration, k-Nearest Neighbors, and a combination of COCOMO calibration and k-Nearest Neighbors. Our results indicate that using kNN to select the nearest projects and calibrating...
Paralleling source code is the most common approach to optimize the performance of Android applications on multi-core processors. However, the problem of selecting a good parallel structure and its parameter tube is still a challenge. This paper proposes the performance optimization method based on selecting the best parallel configuration including the parallel structure and corresponding parameter...
Design by contract and relational interface theories are powerful for specifying component-based systems. We extend these theories with real-time properties so that our technique can model component-based real-time systems. In addition, we use linear temporal logic (LTL) for specifying the invariant properties of contracts. To specify the interaction between methods in a component, and the interaction...
In data mining, link prediction for the networks is one of the areas of greatest interest today. Research achievements of link prediction problem can be applied in many fields such as study genetically transferred diseases, online marketing, e-commerce services, discover the structure of criminal networks, friend request in social networks … However, most of researchers focused on predicting the existence...
Various problems in biomedicine can be formulated as a ranking problem, where a set of candidate components is ranked relatively based on a set of known components. The most popular problem in biomedicine is identification of disease-associated cellular components, where cellular components can be genes, proteins, microRNAs or other molecules. Besides that, a number of problems in pharmacology is...
Building ancestral recombination graphs (ARGs) with the minimum number of recombination events is an essential problem in genomic population studies. Exhaustive search methods have been proposed to solve the problem with few sequences and markers. Recently, we introduced ARG4WG algorithm [1] to build plausible ARGs for whole genomes of thousand samples. However, the ARG4WG algorithm was not designed...
In this work, we propose an efficient architecture for the hardware realization of deep neural networks on reconfigurable computing platforms like FPGA. The proposed neural network architecture employs only one single physical computing layer to perform the whole computational fabric of fully-connected feedforward deep neural networks with customizable number of layers, number of neurons per layer...
Text compression based on graph representation model (referred to as “text graph”) is a fairly common approach. However, one of the difficult issues that this approach poses is how to identify nodes that have co-reference relationships in a text graph? This issue is a question that needs to be answered because previous studies have confirmed that it has a great influence on the quality of the summaries...
In the intelligent transportation system, the geometry for the street is an important factor in vehicle monitoring. It helps to point out areas of interest, reduce computing costs, increased accuracy in detecting and identifying objects and facilitate data collection. In this paper, a new robust method of extracting the geometric model of the road is presented. The method is based on vehicle motion...
The exponential growth of social media has created informative content, which leads to the emersion of social listening tools, in order to serve the need of companies and organizations. These tools are developed mainly in English language and for those which deal with Vietnamese, they lack the analysis capabilities to capture insightful information. In our research, we propose a framework to automatically...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.