Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
This work presents the development of a motorized wheelchair controlled by cervical movements, where two accelerometers are used as sensors in the definition of movement commands of the wheelchair. One accelerometer is positioned in a helmet on the user's head and the second is positioned on chair base. The use of two sensors has the objective of collecting the signals in differential form providing...
Multilevel inverters are one of the most popular and useful type among all and have lots of usage like less disturbance and the possibility to function at higher switching frequencies than ordinary two-Level inverters. They can be used at different applications like electronic derivers, wind turbines and solar plants. In order to feed the DC current produced by PV panels to the inverters, power electronic...
In this work, we study the effect of in-phase soliton interaction with and without the effect of third order dispersion (TOD) in 100Gbps telecommunication system. The relative spacing of soliton is chosen as 5.28 (qo) and their interaction is noted in one collision period or length (Lcoll). The soliton interaction without TOD is noted with β2=−2.55ps2/Km and with TOD near Zero Dispersion (ZD) point...
P = {p,:i ∊ Nn}, Q = {qj, : j ∊ Nm}, R = {rk : k ∊ Nk} are considered as three referential sets and A ∊ R (P, Q;I), X ∊ R (Q, R; I), B ∊ R (P, R; I) are three fuzzy relations. We assume that these fuzzy relations are constrained to each other such that A o X = B. If two of the three components are known and other is to be calculated, then it is called fuzzy relation equation. When A and X are known,...
Semantic computing is an important task in the research of natural language processing. For the problem of the inaccurate conceptual graph matching, this paper proposed the algorithm based on Conceptual sub-Graph weight self-adjustment. Based on the in tensional logic model of Chinese concept connotation, using Recursive Conceptual Graph as knowledge representation method and combining with the computation...
In this paper, we consider the system of linear equations resulted from the elliptic PDE-constrained optimization distributed control problems. A new preconditioner is constructed and the preconditioned Generalized Minimum Residual (GMRES) method is applied to solve the linear system. Theoretical analysis and numerical experimental result show that the proposed preconditioned GMRES method is competitive...
This paper discusses the development of a public transit scheduling tool that can be run on a spreadsheet software. The main objective of the paper is to bridge the existing gap between the theoretical knowledge of bus service scheduling and local transport service providers in order for the latter to improve their service. Users of the tool are allowed to input onboard passenger counts, to analyze...
First, the paper gives the definition of the strongly row (column) full rank matrix, the quasi-upper triangular matrix and the quasi-lower triangular matrix of the m × n matrix. Then the triangular factorization is generalized to the m × n matrix, and some factorization theorems are obtained. By using the triangular factorization, the linear equations with strongly row (column) full rank coefficient...
As a part of a driver assistance system, vehicle topview system plays an important role in driving safety. The objective of this research is to develop a vision-based top-view system to expand drivers' field of view. Four cameras provide a 360-degree view of the surrounding terrain of the vehicle, and the destination image is composed by these four processed images. In this paper, we divide the procedure...
The paper proposes novel voltage-mode quadrature oscillator employing modern active elements VD-DIBA (Voltage Differencing Differential Input Buffered Amplifier). The circuit utilizes only two active elements and two grounded capacitors. Frequency of oscillation and oscillation condition can be controlled orthogonally, thus without violating each other. The proposed circuit was experimentally verified...
Playing a vital role, saliency has been widely applied for various image analysis tasks, such as content-aware image retargeting, image retrieval and object detection. It is generally accepted that saliency detection can benefit from the integration of multiple visual features. However, most of the existing literatures fuse multiple features at saliency map level without considering cross-feature...
We will define two models of error-detecting codes based on quasigroups of arbitrary order. For some special cases of these two models we provide experimental results for the probability of undetected errors if a given quasigroup of order 4 is used for coding. At the end, we will compare the considered special cases.
In this paper, we firstly give the fundamental solution for Beltrami equation. Secondly, based on symmetric extension, we investigate the solution of a Hilbert Boundary Value Problem (BVP, for short) for Beltrami equation by converting it to corresponding Riemann BVP and obtain the explicit representation of solutions.
Quasi-synchronization is an important type of synchronization because of the parameter mismatches in the real world, so we will investigate it for a delayed network, which is master-slave coupled. By applying the aperiodically and nonlinearly intermittent control on the network, and assuming the time delay is varying, we will present some useful criteria for exponential quasi-synchronization. The...
Collaborative Filtering (CF) is one of the most successful recommendation techniques. Regardless of its success, it still suffers from some weaknesses such as data sparsity and user cold-start problems, resulting in poor recommendation accuracy and reduced coverage. Trust-based recommendation methods incorporate the additional information from the user's social trust network into collaborative filtering...
Selecting accurate and simple association rules that efficiently cover all data samples is very important in knowledge discovery. There are several measures to assess accuracy and relations in a rule. This poses a challenge for researchers to select effective measures. Combining different measures via multi-objective evolutionary algorithms is an effective method to select suitable association rules...
In this paper, to study rum or spreading model for the web forum of which the topological structure has a strong heterogeneity, we propose a novel susceptible-exposed-infected-removed (SEIR) model by introducing the importance and fuzziness of the content of the rum or. We derive mean-field equations characterizing the dynamics of the SEIR model on heterogeneous network. Then a steady-state analysis...
We propose a method for evaluating the publication performance of academic institutes across multiple fields. With this method, we first determine the most visible publications (MVPs) for each field from all assessed institutes according to the field's h-index. Then, we measure an institute's performance in each field by its contribution to the field's MVPs as (a) the percentage share of the MVPs...
We study free vibrations of a circular AT-cut quartz resonator using the two-dimensional scalar differential equation by Tiersten and Smythe in conjunction with COMSOL. Resonant frequencies and mode shapes are obtained and compared with available experimental results as well as available analytical solutions of the scalar equation. The accuracy of various analytical solutions is examined.
This paper analyses free vibration frequencies and modes for thickness-shear and thickness-twist vibrations of centrally partially electroded circular AT-cut quartz plate. The elliptical coordinate is introduced for both un electroded and electrode part. Exact solutions of Mathieu equations which are transferred from the two-dimensional scalar differential equation derived by Tiersten and Smythe are...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.