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.
It is very important to reduce the energy consumption of low-density parity-check (LDPC) decoders, especially for the intelligent and mobile terminals in green communications. This paper presents a novel energy-efficient layered decoder (EELD) to save the power consumption of quasi-cyclic LDPC (QC-LDPC) decoders based on the layered belief propagation (LBP) algorithm. The EELD forces a check-node...
Using high resolution Synthetic Aperture Radar (SAR) Orientation is vital for improve the accuracy of mapping. Two experiments were designed to examine the spatial distribution and quality of the ground control points (GCPs) on the influence of geographical deviation. Take different selection method for the spatial distribution of the GCPs in the first set of experiments and get GCPs with different...
In this paper a computational alternative to classify lung nodules using computed tomography (CT) thorax images is presented. The novelty of the method is the elimination of the segmentation stage. The contribution consist of several steps. After image acquisition, eight texture features were extracted from the histogram and the gray level coocurrence matrix (with four different angles) for each CT...
In this paper, we identify and analyze the tradeoff between security and reliability for wireless communications in the presence of eavesdropping attack. Typically, we assume that both destination and the eavesdropper can only obtain channel state information with estimation errors, instead of perfect channel estimation predominantly assumed in the literature. Linear minimum mean-square error estimation...
Usually AC Bias Temperature Instability is modeled as consisting of a recoverable and a permanent component, assuming these components originate from different physical mechanisms. In this work we introduce a model based on charge trapping and detrapping that can properly account for both components. Under switching bias (AC stress), fast traps are able to follow the bias point change, while slow...
The paper considers the resource management system (RMS) in grid computing systems. In grid computing systems, the RMS should adopt the optimal task allocation to maximize the service provider's profit, which equals the difference between service price and service cost. Because of possible external attacks, the system should adopt self-defense to ensure the quality of service. However, the use of...
The coolant dryness of the hollow conductor outlet is an important parameter relevant to the working state of the evaporative cooling system. It was calculated by the balance equation of the flowing pressure and the flowing resistance in the past. The conventional method was complex, therefore a new calculation method on the basis of the condenser's heat balance equation and over-all heat transfer...
Model-based fault detection methods have the potential to reduce the size, weight, and cost of safety-critical aerospace systems. One obstacle to the application of these methods is a lack of appropriate tools to efficiently certify their reliability. This paper focuses on the false alarm analysis of a general fault detection scheme. The main difficulty of the false alarm analysis is the time-correlations...
High reliability is always pursued by network designers. Multipath routing can provide multiple paths for transmission and failover, and is considered to be effective in the improvement of the network reliability. However, existing multipath routing algorithms focus on how to find as many paths as possible, rather than their computation or communication overhead.
In this paper we propose a fast and efficient method of multiobjective optimization for 3DIC building block placement. The objectives are cost, performance and thermal reliability. Our proposed method is based on a Quasi-Newton analytical optimization method. Our approach also uses a scalarization method of Compromise Programming, in which the weighted distance of the objectives from their minimum...
The procedure of tolerance design is suggested for distribution laws given by statistical series. The scattering region is formed as box having smoothing vertices. The approximation of boundary section of statistical series is used by normallike distribution law. This method can be used for modal distribution law.
This paper presents a novel method for calculating the unstable equilibrium point (UEP) for a two-bus system using holomorphic embedding (HE). The method is guaranteed to find the UEP solution. The focus of this paper is to prove mathematically that if a UEP solution exists, the method is guaranteed to arrive at that and only that solution and if no solution exists, then such is indicated by the oscillations...
Noncoherent pulse-position modulation (PPM) with simple channel codes has the potential to realize ultra-low power (ULP) wireless design. In this paper, we develop a Wagnerlike decoding rule for single-parity-check and high-rate Reed-Solomon (RS) coded PPM schemes by simply ‘flipping’ the most unreliable received PPM symbol(s) to obtain a good balance between performance and coding complexity. The...
A typical DC microgrid, which can be enabled by Solid State Transformer (SST), is investigated in this paper. One unidirectional DC/DC converter for photovoltaic (PV), one bidirectional DC/DC converters for battery, and a SST based on distribution system level, are included in the proposed DC microgrid system. In order to manage the system operation, a distributed power management strategy is proposed...
The Distribution System is composed by many factors that define a great execution, when each one perform its function. These factors can be classified in two groups, the system planning and the system management. The relation between these groups is expressed by power supply continuity limits. These limits define how much the system is reliable, or in other words, if the energy injected in the system...
Linear Wireless Sensor networks (LSN) are used to monitor long linear critical structures such as pipelines, rivers, railroads, international borders, and high power transmission cables. Due to the importance of these structures, the LSN must be designed with high reliability considerations. However, one of the main challenges of LSN design is the connection reliability among the nodes. Unlike in...
This paper deals with the development of an efficient iterative method to solve the chance-constrained generation expansion planning (GEP) problem. Reliability in an economic manner is the main criterion when addressing GEP. The algorithm proposed here minimizes the cost of achieving the required reliability. Computational results based on the IEEE 30- and 118-bus test systems are presented. The proposed...
Reliable multicast is a technology used in a number of applications such as multi-receiver file transfer, streaming media, multimedia conferencing, collaborative processing etc. Pragmatic general multicast (PGM) is a reliable multicast transport protocol that runs over a best effort datagram service. Through this paper we propose an efficient loss recovery scheme for PGM. In our proposal a PGM router...
In applications of permanent magnet, the calculation for magnetic flux intensity is of primary importance. The magnetic dipole is simple mathematic model which is used frequently. However, it is required that the evaluation points are far from the magnet; otherwise, the measured data is wrong. An approach of calculating the magnetic flux intensities at those points which are very close to the magnet...
Effective task assignment, which is essential for achieving high performance in a heterogeneous multiprocessor system, remains a challenging problem despite extensive studies. This paper addresses the task assignment problem with guaranteed reliability and timing constraint for heterogeneous multiprocessor system. Inherently, heterogeneous systems are more complex than homogeneous systems. The added...
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.