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In a number of sensing applications users are only interested in the data relevant to their present location and current type. This paper presents a novel distributed and low-power protocol that allows mobile users, while moving around the deployed stationary sensor networks, access data from the sensors in their vicinity. As users acknowledge the data, sensors use these acknowledges as a statistical...
Considering that the amount of money spent for implementing digital library is very high, it is therefore very crucial to evaluate its effectiveness. Since the implementation of digital library in the University of Tehran, Iran, no attempt has been made to evaluate its effectiveness. Against this concern, a study was carried out to investigate the effectiveness of the digital library from the user...
In this paper, we propose reliability adjustment weighted bit-flipping (RA-WBF) decoding algorithm for low density parity-check (LDPC) codes. By adjusting the reliability of received symbols during iterative decoding, the proposed algorithm can offer better tradeoff between performance, convergence speed and computational complexity. Furthermore, this improvement can easily be extended to other variations...
In this paper, we present the analysis of chaotic vibrations in double pendulum by experimental means. We shall illustrate the sensitivity of its motion to initial conditions i.e., the angles of each pendulum from the vertical, θ and Φ at initial time t=0. Here we present the method of video processing as an experimental technique to study the motion of double pendulum in...
Although work-in-process (WIP) balance approaches can achieve average cycle time reduction, due to the characteristics of wafer fabrication facilities (wafer fabs), e.g., re-entrant flow, setup time and batch processing, a lack of effective mechanism to ensure lot movement at the right pace results in degraded cycle time variance, which might be a potential problem when due date is concerned. This...
Industrial plant units are to be isolated from the grid as quickly as possible during grid disturbances. After islanding, load shedding is one the main actions that can be taken to prevent complete black out in industrial plants during such disturbances. The challenge for the islanding scheme is to island within the critical clearing time to avoid total system collapse. Islanding should not be done...
The traditional framework under which error-correcting codes can enable secrecy involves the use of nested codes. While this structure provide us with means to achieve weak secrecy, it is not clear how these codes can be applied to varying wiretap channels. In the spirit of rate-compatible codes, we propose a new framework for coding for the wiretap channel. The proposed scheme is based on random-puncturing,...
Check node update processing for non-binary LDPC (NB-LDPC) architectures requires a large number of clock cycles, which limits the achievable throughput to tens of Mbps for high rate codes. In this work, we propose a new NB-LDPC architecture based on the Trellis-EMS (T-EMS) algorithm that reduces the number of clock cycles by a factor of dc, by adding an extra column to the trellis. This feature makes...
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...
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