The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Research on architecture of domain ontology component-based information semantic representation and integration is studied. Domain ontology component, a "loosely coupled" approach in the use of ontology, is advocated. As a case study, a prototype for agricultural policy-oriented domain ontology component-based semantic information integration system (APODOCSIIS) is established. Ontology...
View and schema integration are two very complex tasks in which several views and/or schemata are merged into one global conceptual schema. Due to its complexity, computer-based applications and tools that support and automate parts of the schema integration process are needed. In this paper we propose a composite schema-based matching approach in which we make use of not only taxonomies but also...
Optimal control deals with the problem of finding a control law for a given system such that a certain optimality criterion is achieved. Most optimal control problems are sufficiently complex such that numerical methods are necessary to compute a solution. Some of the more prominent works on the numerical optimal control are the discrete mechanics and optimal control (DMOC) method based on Newton...
Matrix version of the backward differentiation formulas were used for solving medium scale stiff Lyapunov differential equations with known closed-form solutions. The purpose was to investigate whether the backward differentiation formulas will produce accurate solutions for stiff Lyapunov differential equations of medium sizes. The sizes of the equations under consideration in this paper range from...
Worldwide, wind energy has expanded dramatically. In the U.S., renewable energy has been capturing a growing percent of new electric central generation capacity additions over the past few years. While this expansion is driven, in part, by regulation and incentives, steady improvements in technology have contributed substantially. Turbine sizes and capability are ever increasing. Blade designs are...
Complex wavelet transform (CoWT)-based phase information (PI) extraction methods are popular. None of them is simultaneously simple, fast, and nonredundant. Real discrete wavelet transform (RDWT) is simple, fast, and nonredundant, but it is usually regarded to be lacking PI. After finding out that RDWT conserves the PI of an analyzed signal, this paper proposed three RDWT-based PI extraction methods...
A broadband low cost high power divider was designed. Using an electromagnetic simulator the performance was optimized for high efficiency with good impedance matching. The temperature behavior in steady state was computed, within the framework of the finite integration technique.
This paper proposes network measurement policy system (NMPS), which integrates various network measurement tools by the policy technology. NMPS does not aim at one particular measurement operation, and NMPS separates the control of measurement operation from the measurement operation itself. NMPS provides a scheduling and controlling mechanism, which is independent of network measurement tools and...
With the development of society and economy, the rapid urban sprawl in land use is being witnessed of late in urban districts. As a result, many problems in society and environment have appeared in urban districts, such as population expansion, air pollution, etc. Assessment and inventory on urban sprawl is essential for city planning and sustainable development. The objective of this study was to...
Cementing quality directly influences exploitation of oil or gas layers in oil or water boreholes. Characteristic wave (or pseudo-Rayleigh wave) in acoustic full waveform can evaluate the cementing quality of the secondary interface in cased boreholes. Before evaluating the cementing quality of secondary interface, we must analyze bath propagation velocity and amplitude of the characteristic wave...
The MRTD method highlighted an improvement in the observed dispersion characteristics over the classical FDTD, however the high convergence is hindered because of the low order time-stepping procedure. In this paper, we analyze the convergence of a newly introduced scheme in which the MRTD is incorporated a high-order Runge-Kutta time integrators technique, and show that the mth-order convergence...
Data mining researches focus on algorithms that mine valuable patterns from particular domain. Apart from the theoretical research, experiments take a vast amount of effort to build. In this paper, we propose an integrated framework that utilises a multi-agent system to support the researchers to rapidly develop experiments. Moreover, the proposed framework allows extension and integration for future...
This paper proposes and discusses a GIS that integrates geographic resources with business intelligence data from SAP, TIS and other systems. Location is a unifying theme in business. Location can be an address, a service boundary, a sales territory, or a delivery route. All these things can be visualized and interactively managed and analyzed in a GIS. Spatial relationships, patterns and trends reveal...
By terminating an open multilayered dielectric medium by means of a perfectly matched layer (PML), a closed-form modal series expansion for its spatial-domain Green's functions is obtained, thereby avoiding time-consuming Sommerfeld integration, as required in the conventional approach. The PML-based modal series apply to Green's functions for 2D and 3D geometries, including periodic configurations...
This paper introduces an integrated color and texture feature based content based image retrieval using 2D Discrete Wavelet Transform (2D-DWT).Most of the image retrieval systems are still incapable of providing retrieval result with high retrieval accuracy and less computational complexity. To address this problem, combining color and texture features the effective integrated framework developed...
Knowledge management (KM) plays a major role in the success of implementing enterprise resource planning (ERP) systems in business organizations. This research aims to provide an in-depth understanding of ERP implementation processes in Sri Lanka. The major issues associated with KM in ERP implementations are brought into light and possible strategies for overcoming such issues are identified. The...
Sketch based image coding decomposes an input image into a piece-wise smooth approximation image and a residual image. Image compression by gradient field integration follows this model, but differs by generating the approximation image from gradient data along edge contours and regularly sampled low resolution image data. This allows direct and efficient calculation of an approximation image which...
The aim of this paper is to develop a MATLAB function for one dimensional numerical integration based on adaptive algorithms and Gauss-Lobatto-Kronrod formulas. Using Maple, we find a triple of formulas, and then we use it to code ananalogous of MATLAB quadl function with a higher degree of exactness. Finally, some examples and tests which compare our function and quadl are given. Our function is...
On-line inspection for machining center is one of the key technologies to improve precision and automation. It provides a suit of effective method for the quality inspecting in the machining process of CNC. This paper presents an automatic programming system for on-line inspection. In the system, AutoCAD is selected as the exploitation platform, the integrated system for on-line inspection and CAD...
Access to a large number of remote data sources has boosted research in biomedicine, where different biological and clinical research projects are based on collaborative efforts among international organizations. In this scenario, the authors have developed various methods and tools in the area of database integration, using an ontological approach. This paper describes a method to automatically generate...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.