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Real-time electromagnetic transient simulation system involves high computational tasks and is very difficult to achieve small time step. In this paper, we proposes the field programmable gate array (FPGA) design and implementation for real-time electromagnetic transient simulation system with double-precision floating-point calculation. The parallel computing and fully pipelined architecture of the...
The prediction precision of mathematical models and their interpretability go usually against each other. The increase of the quality of one of the features decreases the other. In this article we introduce a new mathematical model based on Perception-based Logical Deduction (see [18], [19]) which is an implicative fuzzy inference mechanism based on linguistics semantics, and which enables the users...
Properly addressing the performance issues presented in database systems is and has been a significant technological challenge, this due to the uncontrolled fluctuation of user requests. Being able to predict the behaviour of such systems can greatly improve their performance. Several prediction methods, such as linear regression and autoregressive moving average, among others, have extensively been...
For the vibration of the aero pipeline and the conveying pipeline exists universally and the vibration has effects on the pipeline life, the detection accuracy and the system stability, the research on the natural characteristic of the pipeline vibration has promising prospects. In this paper, the vibration mathematical model is built with the simple and practical Rayleigh-Ritz energy method to calculate...
Based on model reference adaptive control (MRAC), a MRAC synchronous controller is designed. And the reference model of the MRAC is determined according to the linear mathematical model of the electro-hydraulic servo system. Then the synchronous controller is applied to position synchronization of two cylinders system. The experiment results show that the proposed controller can effectively reduce...
Cylindrical FDTD schemes are useful for avoiding “staircasing” approximations found in Cartesian modeling. Conventionally, schemes of this type are of (2; 2) order of accuracy. A recently introduced spectral methodology, combined with the modified equation approach, is applied for the analysis of existing cylindrical schemes as well as for the synthesis of new nonstandard and high order ones.
Two advanced modelling approaches, Multi-Level Models and Artificial Neural Networks are employed to model house prices. These approaches and the standard Hedonic Price Model are compared in terms of predictive accuracy, capability to capture location information, and their explanatory power. These models are applied to 2001–2013 house prices in the Greater Bristol area, using secondary data from...
A new accurate hybrid SBR/MoM method is presented in this paper. It considers the interaction in MoM region by calculating the near scattered field instead of the conventional multi-bounce field from SBR region. By applying the SBR method, the near scattered field from SBR region impact on the MoM region is calculated and it finally contributes to the modified excitation vector in MoM matrix equation...
We consider hybrid formulations involving simultaneous applications of the electric-field integral equation (EFIE), the magnetic-field integral equation (MFIE), and the combined-field integral equation (CFIE) for the electromagnetic analysis of three-dimensional conductors with arbitrary geometries. By selecting EFIE, MFIE, and CFIE regions on a given object, and optimizing these regions in accordance...
A new method for making an explicit time-domain finite-element method (TDFEM) unconditionally stable is developed for general electromagnetic analysis. In this method, for a given time step, no matter how large it is, we upfront adapt the TDFEM numerical system to exclude the source of instability. As a result, an explicit TDFEM simulation is made stable for an arbitrarily large time step irrespective...
In this paper, we propose a FDTD(2,4) scheme to reduce numerical dispersion compared to the standard Yee scheme. This scheme is designed to retain a two dimensional stencil in the field update equations. We derive the numerical dispersion equation of this scheme and show its high-phase accuracy at low-grid resolutions. Moreover, the Courant-Friedrichs-Lewy condition (CFL) of this scheme does not decrease...
Prediction stock price is considered the most challenging and important financial topic. Thus, its complexity, nonlinearity and much other characteristic, single method could not optimize a good result. Hence, this paper proposes a hybrid ensemble model based on BP neural network and EEMD to predict FTSE100 closing price. In this paper there are five hybrid prediction models, EEMD-NN, EEMD-Bagging-NN,...
This paper deals with fair public service system design formulated as the weighted p-median problem minimizing the total disutility, like social costs. The social costs are often proportional to the total distance travelled by all users to the nearest located service center. The above objective denoted as min-sum criterion may cause such situation that the total social costs are minimal, but the disutility...
Human action recognition system is fundamental of human activity and behavior recognition, especially for video analysis technologies. In this paper, we introduce an improvement method for human action recognition proposed by P.Chawalitsittikul et al. The actions from RGBD multi-views, taken from cameras at different static-viewpoints in the overlapping Area of Interest, are fused at high-level decision...
Detection of spectrum holes in Cognitive Radio Networks (CRNs) is possible using theory of compressive sensing (CS). At the same time, these unlicensed Cognitive secondary users (SUs) must reliably detect the presence of licensed users or owners of spectrum holes to avoid interference. Precise localization of the transmitting nodes is a complicated but important problem for operation of Cognitive...
Image registration is extensively used in many application domains such as medical, remote sensing, computer vision etc. The basic purpose of image registration is to obtain finest geometrical and radio-metrically aligned image from temporal or multi-modal image sensors. In this study, a novel salient feature-based image registration scheme has been designed and implemented by establishing a set of...
In these days, a technology that utilize of Bluetooth Low Energy (BLE) beacon, has been attracted attention to provide variety of convenience services. Especially, not limited to the service that can assist to people directly such as public safety, healthcare, proximity-based service, mobile payment, etc., a technology that can provide convenience indirectly such as asset tracking has also been proposed...
In this paper, we propose a dual shooting manipulation system for a cooperative string looping. The string looping is cooperative manipulation by two flexible arms. One shooting manipulation system named “loop arm” passes behind a target from one side, and it is captured by the other named “hook arm” at the opposite side of the target. By the string looping, the dual shooting manipulation system achieves...
Cable-actuated systems provide an effective method for precise motion control over various distances. Traditionally, their control has focused on eliminating transverse resonances and disturbances. Longitudinal cable resonances are usually neglected since they are assumed to be at much higher frequencies and much lower amplitudes compared to transverse resonances. However, in high-speed high-precision...
To ensure safe ship navigation, true water depths should be deep enough with respect to the corresponding depths on a chart. Therefore, a set of basic quality indices, including an index of the probability of adequate depth, were developed to evaluate the quality of a digital depth model (DDM) with respect to navigational safety. In addition, these methods are proposed for assessing the probability...
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