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Real data often are comprised of multiple modalities or different views, which provide complementary and consensus information to each other. Exploring those information is important for the multi-view data clustering and classification. Multiview embedding is an effective method for multiple view data which uncovers the common latent structure shared by different views. Previous studies assumed that...
An approach based on a receding-horizon control scheme is here proposed for the optimal control of active and reactive power flows in microgrids (an aggregation of distributed energy resources (DER) of small size (such as photovoltaics, wind generation, cogeneration units — CHP, concentrated solar power — CSP, mini-hydro, energy storage)). Microgrids represent today one of the most promising technology...
Reactive power is an essential part of the power compared with active power. It is used to establish and sustain the magnetic field present in electrical equipment possessive of coils, such as transformers and electric machines. The reactive power consumption in large distribution networks can result in a huge reactive power flow, rising line current and a sub-nominal voltage. To avoid these negative...
As personalization technologies are widely used, preference extraction is becoming important. In this work, we propose a preference extraction method on the basis of applications that are installed on a user's smart device. In this method, keywords are extracted from descriptions of the installed applications on an application market. Then, each keyword is scored by three scoring criteria: degree...
This paper investigates general Z-hop cascaded undirected wireless relay network, where the source, the relays, and the destination form an undirected chain, and each node receives radio waves from its two neighboring upstream and downstream nodes in the chain. We focus on the effect of time-division duplex and hidden-terminal constraints from two aspects: 1) finding all feasible network states (FNS)...
Compared with bistatic RCS, the monostatic RCS calculation is more difficult for the needs of surface current on scatterer induced by the incident wave of every single angle, so the calculation burthen is very large. Based on the character of "coefficients matrix of FDFD equations is invariable whether the angle of incident wave was changed", this paper proposes a fast algorithm for monostatic...
A two-dimensional heat conduction problem is considered for image compression. The introduced heat conduction system does not convect with outer space in a square area, and the original image is treated as the initial temperature distribution. We design a stable numerical method to solve the inverse heat conduction problem for the image decompression. Numerical experiments are done for both image...
Wireless Sensor Network as an important technology of Internet of things' development, is more and more widely used in various research fields. This paper mainly researches the part of localization application based on wireless sensor network, focuses on DV-Hop localization algorithm, and gives its algorithm simulation and analysis of the simulation results. Also this paper improves the algorithm...
A knowledge of the inertia tensors and centre of gravity locations of rigid bodies and rigid mechanical systems is required in precise control of motion and in many other applications whenever the dynamics of them is significantly determined by these inertia parameters. This paper presents a new method for identifying the inertia tensor and coordinates of the centre of mass of a rigid body or of a...
Image segmentation is an important task in computer vision. The task of image segmentation is to portion image into segments, thus provide more meaningful information of the image contents. Many methods have been developed for numerous application. The common problems of most of the segmentation techniques are scattered segmentation lines, too much details, small or thin segments, and noisy segmentation...
Overvoltage and overloading due to high utilization of PVs are the main power quality concerns for future distribution power systems. This paper proposes a distributed control coordination strategy to manage multiple PVs within a network to overcome these issues. PVs reactive power is used to deal with over-voltages and PVs active power curtailment are regulated to avoid overloading. The proposed...
Mathematics education is an essential part of every engineering curriculum. The question of how much math should be included in an engineering curriculum is under discussion and the mathematics content has come under closer scrutiny with the aim of teaching engineers mathematical topics that have close practical relevance to their discipline at a time when those topics are most needed. This article...
Power frequency transformer is necessary when doubly fed induction generator (DFIG) connects with high-voltage ac grid. However power frequency transformer possesses many undesirable properties such as bulky size, environmental concerns. Additionally, the wind farms need reactive power compensation, such as static synchronous compensator (STATCOM). In this paper, the DFIG converter system with integrated...
Introductory engineering problems set foundational knowledge required by students. While statics is a course that is typically offered during the start of an engineering student's sophomore year, it is one of the first pre-professional engineering courses students are exposed to and is important to their persistence in engineering. An understanding of the strategies and misconceptions that students...
The purpose of this paper is to provide a solution of extracting appropriate keywords to identify meaningful learning-contents on the Web. There are some issues in identifying documents that have learning content. Firstly, the documents need to be identified according to the learning area of a student's school year. Secondly, the documents need to be identified according to the learning area that...
A fully instrumented surface vessel involving underactuated structure was designed. The problem of straight line course tracking of the underactuated surface vessel at a constant forward speed is addressed. The Serret-Frenet frame is used to define the tracking error, therefore the position tracking errors could be stabilized by stabilizing the single distance error. Least Squares Support Vector Machines...
This study exhibits the application of the concept of matrices, probability and optimization in making an electronic Tic-Tac-Toe game using logic gates and exhibiting the concept of Boolean algebra. For a finite number of moves in every single game of Tic-Tac-Toe, the moves are recorded in a 3×3 matrix and the subsequent solution, or a winning combination, is presented from the data obtained by playing...
We are interested in healthcare for a bed ridden patient. Although a bed ridden patient in the hospital can be led to a circulatory disorder or a serious secondary disease, it is still difficult to give an adequate healthcare service for the patient due to side effects. Thus, we focus on the method of measuring the continuous and non-invasive bio signal in order to provide important insight into the...
This work presents a parallel implementation of the Parareal method using Portable Extensible Toolkit for Scientific Computation (PETSc). An optimal control problem of a parabolic partial differential equation with known boundary conditions and initial state is solved, where the minimized cost function relates the controller v usage and the approximation of the solution y to an optimal known function...
The present paper describes the strategies used to compile and teach an Informatics course developed during last years at Tallinn University of Technology. The strategy is based on the main principles of blended learning and the analysis of the results of experiments with students from different faculties. Various tests were carried out to identify students' levels of knowledge and preferences in...
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