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At present, increasingly high demands on the quality of the manufactured castings, which are used in the automotive industry. The foundry respect there are a number of advanced technologies, which are used for the casting. These include the technology of production castings by investment casting. It is used particularly where in view of the complex shape casting technology is the production of other more expensive, respectively, it is not at all possible. Such casting is the rotor of the turbocharger to be used in...

Raising abstraction level of designing of custom digital circuits is a major scientific and practical problem that attracts a lot of academic and industrial efforts nowadays. However, existing approaches to handling of this problem typically do not provide sufficient means of defining individual domain- and project-specific custom-level microarchitectural decisions being directed by custom user specification that coordinates their application via specialized controls embedded in this specification. In the article,...

Using interpolation techniques for predicting economic activities such as a movement of cyclist is always vitiated by an error. Therefore, this paper deals with the issue of understanding the error during modelling and compares different assessing criteria for choosing the most accurate method in order to decrease error propagation. The diagnostic of interpolation methods can be calculated with cross-validation approach. In case of kriging methods, we computed the estimated prediction standard errors and we examin...

Time series on quantities, areas harvested and yield average of key global crops in Bulgaria пїЅ wheat, maize, rise and soybean пїЅ are stored in multidimensional database. The developed software modules for statistical processing are embedded into database to give better operability than known software systems with Graphical User Interface. Time series on key global crops production in Bulgaria on national and regional level are studied for the period 2002-2015. Comparative data analysis on two sub-periods with t...

Constrained optimization problems are problems for which a function f (x) is to be minimized or maximized subject to constraints ? (x) . Here f : Rn ? R is called the objective function and F(x) is a Boolean-valued formula. In Mathematica the constraints ? (x) can be an arbitrary Boolean combination of equations g (x) ?0 , weak inequalities g (x) >=0, strict inequalities g(x)> 0, x is integer and x>0 statements. A point u ? Rn is said to be a global minimum of f subject to constraints F if u satisfies the constrai...

The paper deals with the fundamental rule of extensional logics, namely the rule of Existential Generalization. This rule can be applied in the situation when a function f is applied on its argument a to obtain the value of f at a. If the application does not fail, i.e., if the function f is defined at a, then we can existentially quantify, and derive that there is the value f(a). Our system is based on Transparent Intensional Logic (TIL). Since TIL is a hyperintensional, partial, typed lambda calculus, we examine...

In industrial power installations are encountered situations on the connection of inductive circuits to alternating voltage sources. These operations are accompanied by the occurrence of specific transitory regimes after which might occur over-voltages peaks which can become hazardous for the components of the circuit. The assessment of these over-voltages and of other specific electrical parameters represents the purpose of this paper. The measurement method is based on the usage of a data acquisition system prod...

The disconnection of inductive circuits from an alternating voltage source is accompanied by the occurrence of over-voltages, which often are hazardous for the components of the electrical circuit. In this paper is described a modern method for studying transitory regimes which occur at the disconnection of inductive circuits, based on a data acquisition system type NI-USB 6003. The software used is LabView and it is also developed by National Instruments, the developer of the data acquisition system. The paper ap...

In the paper we explain our experiences in the work towards a GML subset profile for Norwegian Areal Plan data sets, and how this GML subset profile together with requirements form the UML based conceptual application schema that can be used for data validation. GML is about to be the preferred exchange language for geographical information in Norway. One challenge using GML, slowing down the implementation of GML in Norway, is the complexity, e.g. the possibilities of representing the same information in multiple...

This paper describes the optimized algorithm for searching Hamiltonian path in graph. Formerly a similar algorithm was developed for the finding of the optimized path in terrain for finding of the precise positioning of Global Navigation Satellite Systems (GNSS) via Real Time Kinematics (RTK) method. The aim of this method is to achieve quality GNSS observation on all the points in question, so that the total length of the path within all these points can be minimized. There are nodes of two types in the graph: 1)...

Thermal anomaly is one of the earthquake precursor in earthquake preparatory phase. Remote sensing in thermal region has been employed recently based on the concept of stress accumulation in the active plate tectonics region, which may be transformed as temperature variation prior event. MODIS Land Surface Temperature (LST) has been commonly used to locate thermal anomalies before earthquake. Recently research has been focusing on moderate or large magnitude earthquake events. In Thailand, even though small earthq...

The research presented in this article is concentrated on developing a series of instruments in order to include modular design in producing customized footwear for the elderly women. For those who live longer, it is important that they stay healthy, active and independent and, as a consequence, it reflects in the market growth of the industry producing goods for the elderly, the footwear industry as well. The loss of the ability to walk due to foot problem, not only produces physical limitations, but also has a s...

The study of the Earth's topographic models has been conducted on the basis of fractal analysis. The mean values of fractal dimension for the Earth's surface on longitudes and latitudes are obtained. It is well known that self-similarity is inherent to many natural objects and space systems; this is why they can be described with fractal dimension пїЅ quantitative measure of geometric complexity of a set (an object). Determining fractal dimensions of different objects allows studying not only their structure but p...

Geoinformation systems are widely used in many different areas of the humanities. Such systems allow to analyze, visualize historical geospatial information and what is more to support historical research processes in various situations. However an objective lack of the specialized GIS-analysis tools intended for historic, ethnographic and other research is tangible. Chronological tracking gives an example of the analysis tool aimed at solving a wide class of historic problems. The development of a geochronologica...

In this paper, the author analyzes the possibility of obtaining the orientation of geologic planes by using GPS tools. Theoretical background for such procedures is represented by an analytical model of finding the attitude by using three noncollinear points. During the experimental stage orientation measurements on synthetic planes were carried out by using GPS tools and geological compass. The output data obtained by GPS and compass was analyzed and compared by using stereographic projection. The measurement unc...

This paper presents a novel heat transfer model for the estimation of heat transfer coefficients without any information about the thermal boundary conditions. The massively parallel implementation (using the latest CUDA 8.0 framework and NVIDIA graphics cards) of the model gives the opportunity to use multiple graphics accelerators to execute the heat transfer simulations. This leads to very impressive performance which makes it possible to run thousands of simulations within a reasonable time. There are several ...

The article deals with the problem of debug of hardware computational units intended for stream data processing on FPGA. Modern solutions are usually oriented to debug of a hardware unit implementation in a simulator with some model input data or to observing the implemented design in the prototype with real target system environment. However effective analysis and debug of implemented computational algorithms requires combined debug with test data exchange between hardware unit model in simulator and its implemen...

The hybrid expert systems are the most effective for solution of geological problems, because their knowledge base includes not only knowledge of experts, but also the regularities received as a result of the analysis of available databases. The prediction problem was the first among the geological problems for which the expert system technology was used for solution. According to the principle of consecutive detailing the main prediction-metallogenic taksons of the researched objects are needed to consider: metal...

In the paper a novel technique of impulsive noise suppression in color digital images is proposed. The new filtering design is based on the exploration of the local pixel neighborhood by geodesic digital paths, whose cost defined as a sum of squared Euclidean distances between adjacent pixels in the RGB color space, serves as a measure of pixel corruption. The digital paths link the border of a filtering window with its central pixel and the cost of a path with minimum value is used to discriminate between the noi...

The aim of this paper is to present results of numerical analysis of a bird model impact with a helicopter windshield. It appears that the research findings which take into consideration the birdпїЅs shape differ from those using a simplified bird model in the shape of a cylinder or a sphere. Overall, at higher speeds the windshield becomes pierced and its damage process occurs in a different manner. In order to conduct an analysis of a bird impact onto an aircraft windshield, we used the LS_DYNA software package....

In the present time an approach is widely developed when the rock mass is considered as an energy-active hierarchical-block medium. The blocks of this medium are constantly interacting with each other and exchanging energy under the influence of various factors. In the intact rock mass the energy dynamic equilibrium of the medium is maintained due to constant energy feeding and, at the same time, due to continuous processes of structural discontinuities destruction on different levels. The seismic energy frequentl...

Currently widely understood Information and Communication Technologies (ICT) has dominated most branches of the economy. Still, their potential has not been fully exploited. One of these areas where ICT is used to a limited extent is the management of complaints. The current problem in an era of rising expectations and requirements of customers or consumers is the way of collecting and processing large amount of data associated with manufactured products and services supplied. This analysis of data sets can provid...

The article presents our own solution of a monitoring information system developed on base of experience learned from completed projects. Information system integrates automated data collection by geodetic and non-geodetic sensors, and presentation of data through a web interface. The measuring part of the system supports data collection by multiple types of sensors. At present are pluggable leveling sensors (Leica DNA03, Leica Sprinter), GNSS sensors (Leica System 1200), 3D sensors (robotic total station Topcon G...

Ensuring environmental and industrial safety is a complex interdisciplinary problem. According this, it is necessary to solve the following problems: ? risk analysis of accidents and safety management of chemical-technological processes and systems for preventing failures and emergencies in conditions of uncertainty; ? reliability analysis of chemical and technological processes and systems and corrosion resistance of process equipment in various aggressive environments in order to increase resiliency and prevent ...

We consider formation of the knowledge database within geographic information systems for support the managerial decisions on the development of spatially distributed systems and territories. Knowledge database built on systematized and formalized the laws of development of objects, phenomena, events of the subject area, obtained through theoretical studies, practical activities and work experience that allows professionals to formulate and solve management problems. To represent ontologies in the knowledge base i...

Climate change and population growth are the key drivers of land use-land cover (LULC) change in sub-saharan Africa. Ecosystem services from the species biodiversity have been the sources of food and energy in Nigeria through agriculture and provision of food, firewood, and shelter. The change in LULC has led to the degradation of the natural resources especially the plants which their severe extinction poses major threats to the increasing rural population whose livelihoods depend on them. The study aimed at usin...

In spatial data processing, the area of legislation is crucial but often neglected by the expert's community. Knowledge of the various legal aspects related to the data collection, data processing, and analysis of data, as well as publishing the results of spatial analysis and its visualization, is an essential prerequisite for effective work. Legislative aspects are understood as a set of legislative standards, their relationships and their influence on other fields of human activity. In the context of geoinforma...

This article discusses the use of different algorithms for analyzing data obtained by magnetic measurements in archaeological excavations. The aim of this work is the automatic detection of possible anomalies in data that may indicate the presence of archaeological sites. The article discusses two kinds of anomalies пїЅ useful (caused by the presence of archaeological sites) and spot anomalies (caused by the presence of various metal debris). Spot anomalies create local noise that interfere with the determination ...

Nowadays, efficient urban transportation systems have a very strong impact on economic prosperity and development. The quantity and quality of transport infrastructure can influence attractiveness and desirability of urban regions for certain industries and can affect the quality of life of its citizen. Passenger transportation systems are characterized by complexity of its behavior and a high level of uncertainty; therefore simulation technologies have become an effective tool for their modeling and managerial de...

Economists usually apply quantitative methods for analysing economic data. Most of this data has a connection to a particular place or space. In geography, the location plays a crucial role, and together with attributes of such location it represents geospatial data. Collaborative work of economists and geographers (geoinformaticians) offer great opportunities in geospatial-economic data analysis and visualisation. Joining two relatively distinct disciplines brings added value for both economy and geography. In ot...

None of optical devices is perfect. Each lens has some errors, e.g. tilt, coma, spherical or chromatic aberration. The more lenses are in the optical device the more errors can reveal. All these imperfection accumulates and multiplies during the path through the optical device. It is necessary to know how the light passes through and interacts with each optical element. There are some possibilities of simulation of these defects. One of these methods is ENZ (Extended Nijboer-Zernike) theory which can be set up for...

P systems are powerful computational devices, whose structure and functionality are inspired by living cells and organisms. P colonies are one of the types of P systems working with objects. They are formed from one-membrane agents placed in the shared environment and they use very simple rules. It was proved that P colonies are computationally complete devices. In the paper, we investigate the application of P colonies to simulate logical operators. It is obtained in a constructive way. In the first steps we show...

For the last few decades the information technologies have become an inseparable part of the modern society life. Their level is one of the key indicators of the countryпїЅs scientific and technical progress, which determines the quality of life of the citizens. Today the thing is that an effective functioning of national economy, research or services sectors branches is impossible without their integration with advanced information and (or) communication technologies. Due to the integration we have such synthetic...

Structure-independent databases are widely used in different spheres for specific tasks solving. Nevertheless, their main problem is a low efficiency that prevents them to be in progress. This work is concerned to the problems associated with data insertion. The causes of this low performance can be called the use of the existing object method of procedures creation and heterogeneity of the data insertion procedures creation process. This process uses object representation form for process of data insertion proced...

Currently, terrestrial laser scanning is one of the most common method of measurement used for registration of the shape of objects. This technology enables in short time to designate huge collections of spatial data, known as point clouds. Due to the amount of occupied memory, storing large data sets becomes now a big problem. One solution is to create algorithms that allows to reduce the amount of recorded data without losing the essential spatial information. On the market there are mostly paid programs, that a...

The results of research conducted in the field of development and application of mobile systems in problems of monitoring extreme weather situations (EWS). The proposed methods and development models take into account modern technologies like Map Reduce, Hadoop Java API, use of a precedent knowledge base about similar situations. The study places considerable emphasis on ensuring the reliability of the database and knowledge. Implementation of monitoring involves the use of a cloud of drones and other information ...

Despite the common application of a wide variety of IT solutions in organisations, one may relatively frequently come across processes under which information is manually processed by employees, and even if specific IT tools are used for the processing, the extent of operations conducted manually remains considerable. In numerous cases, similar processes may be supported by tools created using spreadsheets. Such tools can be developed by means of a rather narrow array of embedded spreadsheet features and mechanism...

We propose a model of a programmable quantum processing device realizable with existing nanophotonic technologies and which can be viewed as a basis for new high performance hardware architectures. The physical architecture is formalized by a mathematical model of the Quantum Processing Unit (QPU), which is a hardware-specific modification of the quantum circuit model of computation, and it is universal as well, since the available set of operations provides a universal basis for quantum computations. The proposed...

The article presents modeling data on taxes and average annual salary in Bulgaria. This information is stored in a created relational database containing twelve tables. Updating the database is done each year, and the respective new records are entered into the indicated tables. The data about the taxes that are included in total expenditure of households by expenditure groups, average annual salary in Bulgaria and average annual salary by regions (North-West, North Central, North-East, South-East, South-West and ...

Predictions of catastrophic seismic events are extremely important. Such predictions are based on the continuous monitoring of many varying values characterizing the tension in the earth's crust. One of these indicators is micro oscillations in the Earth's crust, committed under the influence of the lunar-solar tidal forces. Devices for the registration of these oscillations are extremely complex, based on laser interferometric techniques. These devices converts length increment into according increment the phase ...

Within the framework of this study, the subject and object of the study has been determined, problem, goals and objectives have been formulated, and the following results, which have signs of scientific novelty, have been achieved. The notion of NBIC information space is introduced, the content of NBIC clusters is disclosed. The concept of convergence of information spaces was introduced and its role in the characterized process of NBIC convergence was shown. The synergetic effect of the transformation of the info...

An important aspect of the management of territories is the possibility of constructing models describing the behavior of the territory (managed system), which predict the response to control action. The processes of territory management and organizational systems closely links with the concept of damages (risks). When we talk about geo-processing management, we use the concept of пїЅgeo-hazardsпїЅ. The work is devoted to the problems of applying the classical theories to new problems: the description of the behav...

Linear programming problems are optimization problems where the objective function and constraints are all linear. Mathematica has a collection of algorithms for solving linear optimization problems with real variables, accessed via LinearProgramming, FindMinimum, FindMaximum, NMinimize, NMaximize, Minimize, and Maximize. LinearProgramming gives direct access to linear program- ming algorithms, provides the most flexibility for specifying the methods used, and is the most efficient for large-scale problems. FindMi...

The problem of a vortex pair motion under a free surface is considered. It is known (Barker S.J. & Crow S.?., 1977) that the vortices fly apart with respect to each other in the horizontal direction. The domain of computation will be on the half-plane with the symmetry condition on one of the vertical boundaries. Previously was received (Gushchin V.A. & Konshin V.N, 1992), that for the correct mathematical modeling of an unsteady thick layer of homogeneous incompressible liquid flow through an obstacle, it is nece...

Eco-grammar systems represent grammar systems which were motivated by the behaviour of ecosystems. They were introduced in 1994 in order to describe evolving environment and community of agents together with the interplay among them. Positioned eco-grammar systems (PEG systems, for short) were introduced in our previous paper as a variant of the eco-grammar systems. Motivation for introducing the PEG systems and its main difference from the original eco-grammar systems is that we focus on the embodiment of the age...

Simulation modeling methods allow researchers to create models of complex systems. And it still remains a scientific field. Our purpose is to implement simulation models in training, but as a destination also to business пїЅ to actually use autonomous applications as support systems decision-making in the tourism industry. This paper considers some opportunities of the system for simulation modelling GPSS World Personal Version for creation and applying simulation models in the training managers in the hotel busin...

One of the most popular systems of simulation - GPSS World provides users (1) software tools to interact with the system in the process of simulation research and (2) software tools, realizing immediately the implementation of the model (including: syntax analyzer interpreter model, clock modeling, management of the list of events and more.). Until a few years ago the programs in the first group only automated a part of research itself, namely the creation of a text model and conduct experiments with it. In the ab...

Lots of modern heat supply systems were designed and constructed many years ago, but used today with low efficiency. The task of optimization of heat supply systems to increase the efficiency of such systems is related with high capital expenses of such process, but also with high mutual integration of heat supply systems with other infrastructure objects. In this regard the heat supply organizations are faced with a task of optimization of the efficiency indicators of functioning heat supply systems with minimal ...

The paper deals with optimization of point cloud data processing for surface representation of objects with complicated structure. The model object in our research is represented by a coniferous tree with difficult structure obtained by the method of terrestrial laser scanning. Its precise geometric expression and vector representation is essential and it provides the basis to study the impact of natural conditions to the state and development of the coniferous tree using geographical information systems in the fi...

Organization of the Access database of the Kadiica copper deposit Eastern Macedonia represents the first attempt of this paper authors to synthesize geological exploration data of this ore bearing locality in one professional database available for the wider auditorium. Authors experience in organization of similar databases for other metal deposits such are Bucim, Borov Dol, Zletovo, Sasa etc., gave us an opportunity to construct quality Access database for the Kadiica deposit. This deposit is of porphyry type wi...