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Tunable laser system requires high resolution and accuracy in position of the wave selective optical element, which can be attained through the use of stepper motor. This paper focuses on the stepper motor controller, with the feedback to improve the accuracy and the microstepping technique to improve the resolution. Sine cosine and trapezoidal current controlling techniques for the micro stepping...
In this paper, we propose an indoor visible light positioning system which is based on time difference of arrival (TDOA). Compared to current TDOA which uses square wave for pilot signal, our system uses sinusoidal wave for pilot signal. Our proposed system is simulated in the room measuring 5×5×3m3. In the simulations, we consider the effects shot noise, thermal noise and noise from reflected light...
This paper is the article which researches the control algorithm applied to servo system of antenna sub-reflector, the main control algorithm is fuzzy sliding mode control algorithm. This paper first introduces the idea of fuzzy-sliding mode algorithm, then describes the background knowledge about applying to the antenna sub-reflector. The main content of this paper is simulation and comparative analysis,...
This paper introduces a new joint probability density function (JPDF) for estimating delay-power distribution. Linear and logarithmic skewness factors have been used for estimating the accurate JPDF. Both proposed models are compared to bivariate normal model for NAND2, NAND3, NOR2, NOR3 circuits and ISCAS85-C432We verified the accuracy of our proposed model using Nangate 45nm standard cell library...
The work in this paper describes the applicati on of an optimized eigensolver algorithm to produce the kernel calculations for simulating quantum-dot cellular automata (QCA) circuits, an emerging implementation of quantum computing The application of the locally optimal block preconditioned conjugate gradient (LOBPCG) method to calculate the eigenvalues and eigenvectors for this simulation was shown...
Critical to the successful implementation of Open System Architecture (OSA) test software, in accordance with the requirements of IEEE 1641[1][2], is the implementation Signal Libraries using the Test Signal Frameworks (TSFs) that provide the test program set (TPS) Developer with the suite of defined signals to be used for the test software. This paper aims to provide insight for the TPS developers...
The estimation of the fundamental matrix is an important problem in epipolar geometry. Many estimation methods have been proposed before, including the eight-point algorithm, Simple Evolutionary Agent (SEA) and RANSAC. In this paper, we investigate the evolutionary agent-based algorithm for fundamental matrix estimation, and present a new algorithm that improves the existing evolutionary algorithm...
This paper focuses on the construction confidence intervals and confidence limits of products' reliability based on the distribution-based model, a widely applied degradation model. The model is briefly reviewed in the first place with a focus on the sources of uncertainties associated with it. By simulating the propagation of these uncertainties, a simulation-based approach for the constructions...
The application of wireless sensor networks (WSNs) has been greatly improved by the advance of micro-electromechanical systems (MEMS) and radio frequency (RF) technology. Compared with the traditional networks, WSNs are data-centric, self-configuring and self healing. In this paper, a novel probabilistic fuzzy logic based localisation algorithm is proposed which can be effectively used in three-dimensional...
A grey-based adaptive particle swarm optimization (PSO) applied to the system identification for a class of nonlinear systems is proposed in this study. In the grey-based adaptive PSO, the inertia weights are dynamically adapted according to the results of grey relational analysis at each generation. Every particle has its own inertia weight which may differ for different particles or different generations...
Among many applications of Shuttle Radar Topography Mission (SRTM) and digital elevation model (DEM), the suitability of this data for simulating potential insolation (PI) has not been fully examined. This study examined the accuracy of potential insolation simulation based on 3 arc-second resolution SRTM. The National Elevation Dataset (NED) was used as reference data. Using a method which does not...
Self-localization using unsynchronized low-complexity anchors has a number of attractive features. Traditional self-localization techniques are not suitable to this scenario or have their applicability limitations. In this paper, a two-step hybrid self-localization technique using unsynchronized low-complexity anchors is proposed, which can achieve two-dimensional (2-D) instantaneous localization...
Location-based services are one of the demanding applications on mobile devices that account for significant battery usage. In this paper, we evaluate the potential average savings over using approaches such as GPS for localization that can be achieved by (i) using local low-energy mobile node cooperation and/or (ii) additional local infrastructure (fixed) beacon nodes that broadcast their position...
In this work, we deal with the conditions of when the network percolates. Unlike the previous work, where establishing connections are limited to only four adjacent sub-squares (the left, right, upper and lower sub-squares), we allow the transmission connection can be established with all eight adjacent sub-squares of the sub-square of interest. To prove the condition of percolation, we find the lower...
In this paper we present strategies that can potentially improve the accuracy of photovoltaic (PV) simulation models. Generally, output performance levels vary in similar types of photovoltaics. We have categorised different model parameters and highlighted their potential impacts because of the tolerance limits from PV manufacturers. We have focused on the fill factor (FF) to express the characteristics...
A behavioral model of polycrystalline solar module ET-P660230WW applying semi-empirical approach is presented. The model equations are coded in Matlab. The simulation results are verified against the data provided in the data sheet of the module.
This paper presents a method for real-data validation of simulation models in a function-based modular framework. The system to be simulated is separated into singular subsystems called functions. The function-based modular framework guarantees that the interfaces of the functions are consistent, independent of any simulation tool, with which they are simulated, and simulation purpose. To validate...
The inherent characteristics of Wireless Sensor Network (WSN) make node localization become a major challenge. A high-precision weighted Bounding Box (HPWB) algorithm is proposed to improve the localization accuracy of original Bounding Box algorithm. In HPWB algorithm, unknown nodes are divided into three categories according to the number of neighbor anchors. As for nodes in category one, a weighted...
An efficient colorization scheme for images based on prioritized source propagation is proposed in this work. A user first scribbles colors on a set of source pixels in an image. The proposed algorithm then propagates those colors to the other non-source pixels. Specifically, the proposed algorithm identifies the non-source pixel with the highest priority, which can be most reliably colorized. Then,...
This paper analysis the problem of current sensing accuracy in power switches protection circuits. There are two distinct situations that must be taken into account separately: current detection and current limitation. While the typical sensing topology is similar for these two cases, the biasing conditions are different, leading to significant accuracy differences. Sense current analytical expressions...
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