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Search results for: image%20analysis

  • Oil refinery dusts: morphological and size analysis by TEM

    Publication

    The objectives of this work were to develop a means of sampling atmospheric dusts on the premises of an oil refinery for electron microscopic study to carry out preliminary morphological analyses and to compare these dusts with those collected at sites beyond the refinery limits. Carbon and collodion membranes were used as asupport for collection of dust particles straight on transmission electron microscopy (TEM) grids. Micrographs...

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  • Video content analysis in the urban area telemonitoring system

    Publication

    The task of constant monitoring of video streams from a large number of cameras and reviewing the recordings in order to find a specified event requires a considerable amount of time and effort from the system operators and it is prone to errors. A solution to this problem is an automatic system for constant analysis of camera images being able to raise an alarm if a predefined event is detected. The chapter presents various aspects...

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  • Sensitivity analysis of critical forces of trusses with side bracing

    The present research is devoted to the study of out-of-plane buckling of trusses with elastic side bracing. Inthis paper, a sensitivity analysis of critical buckling loads of a truss due to bracing stiffness is carried out. A method based on the sensitivity analysis for the determination of the threshold bracing stiffness conditionfor full bracing of a truss is proposed. The influence lines of the unit change of the bracing stiffness...

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  • Detection of the Bee Queen Presence Using Sound Analysis

    Publication

    - Year 2018

    This work describes the system and methods of data analysis we use for beehive monitoring. We present overview of the hardware infrastructures used in hive monitoring systems and we describe algorithms used for analysis of this kind of data. Based on acquisited signals we construct the application that is capable to detect an absence of honey bee queen. We describe our method of signal analysis and present results that allow us...

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  • MACHINE LEARNING SYSTEM FOR AUTOMATED BLOOD SMEAR ANALYSIS

    In this paper the authors propose a decision support system for automatic blood smear analysis based on microscopic images. The images are pre-processed in order to remove irrelevant elements and to enhance the most important ones - the healthy blood cells (erythrocytes) and the pathologic (echinocytes). The separated blood cells are analyzed in terms of their most important features by the eigenfaces method. The features are the...

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  • LDFEM analysis of FDP auger installation in cohesive soil

    Publication

    - Year 2018

    This paper deals with large deformation finite element (LDFE) preliminary modelling of Full Displacement Pile (FDP) installation in cohesive soil deposit located in Jazowa, Poland. The detailed FDP auger geometry is applied and the drilling process is modelled with full 3D Coupled Eulerian-Lagrangian (CEL) formulation. The total stress approach and elastic-perfectly plastic model with rate-dependent Mises plasticity is used. The...

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  • Novel analysis methods of dynamic properties for vehicle pantographs

    Publication

    - Year 2018

    Transmission of electrical energy from a catenary system to traction units must be safe and reliable especially for high speed trains. Modern pantographs have to meet these requirements. Pantographs are subjected to several forces acting on their structural elements. These forces come from pantograph drive, inertia forces, aerodynamic effects, vibration of traction units etc. Modern approach to static and dynamic analysis should...

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  • ANALYSIS OF EFFECTIVENESS AND COMPUTATIONAL COMPLEXITY OF TREND REMOVAL METHODS

    The paper presents a method of processing measurement data due to remove slowly varying component of the trend occurring in the recorded waveforms. Comparison of computational complexity and trend removal efficiency between some commonly used methods is presented. The impact of these procedures on probability distribution and power spectral density is shown. Effectiveness and computational complexity of these methods depend essentially...

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  • Current risk analysis and management issues in technical systems.

    Dealing with the reliability and safety of industrial hazardous plants requires taking into account relevant interdisciplinary scientific knowledge and some existing approaches based on so-called good engineering practice, also those included in the international standards and guidelines. In this article an approach is proposed how to integrate the functional safety concept with information security aspects in the design and management...

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  • Nanoparticles displacement analysis using optical coherence tomography

    Publication

    Optical coherence tomography (OCT) is a versatile optical method for cross-sectional and 3D imaging of biological and non-biological objects. Here we are going to present the application of polarization sensitive spectroscopic OCT system (PS-SOCT) for quantitative measurements of materials containing nanoparticles. The PS-SOCT combines the polarization sensitive analysis with time-frequency analysis. In this contribution the benefits...

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  • The Point Estimate Method in a Reticulated Shell Reliability Analysis

    Publication

    The objective of this paper is to present an application of the point estimate method (PEM) to determine the probabilistic moments for engineering structures. Reliability analysis is illustrated by two examples: an estimation of the critical force in linear elastic buckling analysis and a reticulated shell limit load determinations. Calculations were also made using Monte Carlo method. It has been shown the practical usefulness...

  • Multidimensional Scaling Analysis Applied to Music Mood Recognition

    Publication

    - Year 2013

    The paper presents two experiments aimed at categorizing mood associated with music. Two parts of a listening test were designed and carried out with a group of students, most of whom where users of online social music services. The initial experiment was designed to evaluate the extent to which a given label describes the mood of the particular music excerpt. The second subjective test was conducted to collect the similarity data...

  • The reasons of considarable deflections of roof trusses in engineering analysis

    Publication

    - Year 2013

    The aim of the paper is to present an unconventional analysis of deformations of roof trusses of an exhibition pavilion. Structure of the main hall of the pavilion consists of repeatable span frames with steel pillars made of I-sections, fastened in the foundations and hinged supporting roof girders. The roof trusses, completed in steel construction, have undergone considerable permanent deflections. Deformations of the lower chord...

  • Parametrization and Correlation Analysis Applied to Music Mood Classification .

    The paper presents a study on music mood categorization. First, a review of music mood models is presented. Then, the preparation of a set of music excerpts to be used in the experiments and music parametrization is described. Next, some listening tasks performed to obtain mood descriptors are introduced. Finally,the correlation between mood descriptors and features extracted from parameters is discussed. The paper concludes with...

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  • An analysis of domain-based ship collision risk parameters

    According to a lot of contemporary research on ship collision avoidance the classic approach parameters – distance at closest point of approach (DCPA) and time to the closest point of approach (TCPA) – are not sufficient for estimating ship collision risk and for planning evasive manoeuvres. Consequently new measures are introduced, often utilizing the concept of a ship domain. Their drawback, up to this point, was the lack of...

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  • Structural changes in the polish economy- the analysis of input-output

    Publication

    - Year 2011

    this paper analyses the structure of polish economy using three input-output tables for years 1995, 2000 and 2004. applying the traditional methods proposed by rasmussen the sector's backward and forward linkages are identified. industries with large backward and forward linkages are named "key sectors" and play an important role in the development strategy of a country, so the outcome of the paper may be used for the development...

  • Analysis of correlation between heart rate and blood pressure

    Publication

    - Year 2011

    W artykule przedstawiono analizę korelacji pomiędzy częstością akcji serca (HR) i ciśnieniem krwi (BP). Wykorzystano rzeczywiste pomiary ciśnienia skurczowego i rozkurczowego krwi zmierzonego metodą inwazyjną w tętnicy promieniowej. Ze względu na możliwe zaszumienie sygnału przeanalizowano także dane po filtracji filttrem uśredniającycm oraz wykonano analizę trendów sygnałów. Wyniki analizy zarówno danych pomiarowych jak i filtrowanych...

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  • Analysis of microstructured optical fibers using compact macromodels

    W niniejszym artykule zaproponowano nową technikę analizy światłowodów fotonicznych. Zaprezentowany algorytm jest kombinacją metody redukcji rzędu modelu oraz techniki dyskretnych rozwinięć funkcyjnych i pozwala w znaczącym stopniu zmniejszyć liczbę zmiennych (nawet do 85%), redukując (nawet 16 krotnie) czas symulacji.

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  • Polarization sensitive optical coherence tomography with spectroscopic analysis

    Optyczna tomografia koherentna (OCT) jest nieinwazyjną, nieniszczącą i bezkontaktową metodą obrazowania wewnętrznej struktury obiektów i materiałów rozpraszających. Dodatkowo w połączeniu z analizą stanu polaryzacji metoda ta umożliwia badanie lokalnych zmian optycznej anizotropii występującej w badanym obiekcie. W artykule przedstawiono zalety oraz ograniczenia metody oraz przedstawiono propozycję rozszerzenia analizy o badanie...

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  • Spectroscopic analysis for polarization sensitive optical coherent tomography

    W artykule przedstawiono właściwości oraz ograniczenia optycznej tomografii koherentnej z analizą stanu polaryzacji promieniowania optycznego. Zaproponowano nową spektroskopową metodę analizy sygnału pomiarowego w PS-OCT oraz przedstawiono i omówiono zalety nowego rozwiązania na bazie uzyskanych wyników pomiarowych.

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  • Analysis of the Suitability of Selected Data Tranmission Systems in RSMAD

    This paper analyses the suitability of the selected radio communication systems currently used for data transmission, or usable in the future, in Radio System for Monitoring and Acquisition of Data from Traffic Enforcement Cameras (in short RSMAD). The paper also presents the advantages and disadvantages of each systems, paying particular attention to features that directly affect the suitability of the solution in the RSMAD system....

  • Analysis of changeability of operational loads of main engines on dredgers

    Publication

    Artykuł przedstawia analizę zmienności eksploatacyjnych obciążeń silników głównych i głównych odbiorników energii na trzech podstawowych typach pogłębiarek. Sformułowano zasady przetwarzania wyników pomiarów, jakie powinny być stosowane przy analizie statystycznej eksploatacyjnych obciążeń silników głównych i głównych odbiorników energii na pogłębiarkach

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  • Analysis of elementary cellular automata using the theory of conflict

    The paper contains decomposition of elementary cellular automata (ECA in short) to subsystems that are defined according to a new theory called theory of conflict (ToC in short). The decomposition is a completely new approach to analysis of ECA and complex systems in general.

  • Sample preparation methods used in food flavor analysis

    Publication

    - Year 2011

    Jako, że żywność to skomplikowana matryca, a związki lotne w niej zawarte występują zazwyczaj na poziomie śladowym wymagane jest zastosowanie specjalnej procedury przygotowania próbek. W pracy zostały opisane niektóre metody przygotowywania próbek żywności, które łączą w sobie izolację i wzbogacanie analitów. Wśród opisanych metod znalazły się: PT, SPME, SDME, SBSE oraz SFE.

  • Analysis of Excavation-induced Deformation with Different Soil Models

    Publication

    - TASK Quarterly - Year 2010

    Monitorowany wykop budowlany w centrum Warszawy poddano symulacjom numerycznym z wykorzystaniem metody elementów skończonych. Wykop zrealizowany został w pre-konsolidowanych utworach spoistych z zastosowaniem ścian szczelinowych i metody stropowej. Szczególnie ważny w symulacjach tego rodzaju zagadnień jest wybór modelu zachowania się gruntu w warunkach małych odkształceń przed osiągnięciem zniszczenia. Opis aktualnej sztywności...

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  • Stability analysis of multilayered composite shells with cut-outs

    W pracy analizowana jest stateczność ściskanej osiowo kompozytowej powłoki warstwowej. Badany jest wpływ usytuowanego centralnie w powłoce kwadratowego otworu na stateczność konstrukcji. Obliczenia wykonano w programie NX-Nastran (wersja 6.0). Poziom obciążeń krytycznych wyznaczony został w rozwiązaniu liniowym (liniowy problem własny) oraz na drodze analizy przyrostowej z uwzględnieniem dużych przemieszczeń (statyka nieliniowa)....

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  • On elasto-plastic analysis of thin shells with deformable junctions

    Publication

    - Year 2011

    Przedstawiono nieliniowe warunki równowagi nieregularnej cienkiej powłoki w oparciu o zasadę prac wirtualnych. Wyprowadzono dwu-wymiarowe zależności konstytutywne w zakresie sprężysto-plastycznego zachowania sie powłoki poprzez podzial powłoki na n warstw oraz całkowanie trój-wymiarowych zależności konstytutywnych po wszystkich warstwach. Jako przykład przeanalizowano ciśnieniowe urządzenie pomiarowe z uwzględnieniem odkształcalności...

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  • Kinetic analysis of the stage for a high speed steam turbine

    This article analyzes possibilites of resonances within a control stage for a high speed steam turbine. This stage hase been based on assembling of a single blade to a rotating disk and increasing of rigidity of the system by using of a bandage. In the analysis will be nd a possiblity of resonance frequency, and mistuning by showing safety working ranges. The calculations have bean used the3D modal and harmonic analysis by the...

  • Ion Chromatography in Environmental Analysis of Selected Organic Acids

    Publication

    Low molecular mass carboxylic acids (LCAs) occur in many environmental compartments dueto natural processes and human activity. When volatile and nonvolatile acids are to be monitored then liquidchromatography, including ion chromatography seems a method of choice. At high pH the acids are inionized form and can be separated as carboxylats by means of anion exchange chromatography. LCAs canalso be separated at low pH by ion exclusion...

  • Analysis of the incompressibility constraint in the smoothed particle hydrodynamics method

    Publication

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  • Modeling and analysis of the effectiveness of the guard systemswith dynamic graphs

    Publication

    - Year 2011

    In the following paper it will be presented a new model for analysis (in polynomial time) of the effectiveness of the guard systems. Therewill be presented its practical applications in problems such as searching for the weakest points of the system, planning guards' paths or cameras deployment, switching image from multiple cameras on several monitors, or interception of the intruder. This model is based on describing the guarded...

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  • Using concentrated spectrogram for analysis of audio acoustic signals

    Publication

    The paper presents results of time-frequency analysis of audio acoustic signals using the method of Concentrated Spectrograph also known as ''Cross-spectral method'' or ''Reassignment method''. Presented algorithm involves signal's local group delay and channelized instantaneous frequency to relevantly redistribute all Short-time Fourier transform lines in time-frequency plain. The main intention of the paper is to compare various...

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  • Uncertainty analysis of measuring system for instantaneous power research

    The paper presents a metrological analysis of the measurement system used for diagnosis of induction motor bearings, based on the analysis of the instantaneous power. This system was implemented as a set of devices with dedicated software installed on a PC. A number of measurements for uncertainty estimation was carried out. The results of the measurements are presented in the paper. The results of the aforementioned analysis helped...

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  • A New Model for context aware applications analysis and design

    Publication

    - Year 2011

    W artykule zostały opisane aplikacje kontekstowe, które działają w przestrzeniach inteligentnych, oraz zostały przeanalizowane ich właściwości. Na podstawie analizy zaproponowano nowe podejście do ich modelowania które zapewnia oddzielenie logiki aplikacji w zakresie adaptacji (do zmian środowiska) od jej realizacji. Zostały wykorzystane MVC i modele zmian stanu. Zaproponowano ilościową miarę poziomu kontekstowości a także sposób...

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  • Automatic Analysis System of TV Commercial Emission Level

    Publication

    - Year 2012

    The purpose of the study was to determine whether the commercial emission level is higher than the emission level of a regular program and to check if the commercials broadcasters follow the recommended levels of loudness. The paper shortly reviews some chosen methods of volume measurements specified in the ITU and EBU recommendations. Then, it describes a prototype of a system implemented in Embarcadero C++ Builder 2010 which...

  • Experimental and numerical analysis of wave propagation in ground anchors

    Publication

    - Year 2016

    The article focuses on wave propagation phenomenon in ground anchors. The main aim of the investigation is the non-destructive diagnostics and the assessment of the state of ground anchors, using the guided wave propagation method. Laboratory models of anchors with different lengths of the anchor body were tested and voltage signals of propagating waves were registered at several locations. For all tested specimens corresponding...

  • Observation value analysis - integral part of Bayesian diagnostics

    Publication

    Detailed subject of the research is to analyse the value of the observation, which is a part of preposterior analysis. For the presented network, the main objective was to determine, conducting of which of three tests is the most valuable from the perspective of determining possible need or possibility to omission expensive technical expertise. The main advantage of preposterior analysis is answering the question which of the considered...

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  • Strength analysis of the support structure of the offshore wind turbine

    Publication

    - Year 2015

    The global power demand from renewable sources is growing. One of a very favorable solution which meets severe environmental protection requirements are the offshore wind turbines. The offshore wind energy sector has experienced very fast development over last decade. Offshore wind farms, in comparison with onshore applications, can provide increased efficiency with reduced noise, visual, transportation and installation con-flicts....

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  • Analysis of transformer state by fuzzy TOPSIS and AHP method

    Publication

    - Year 2014

    The paper presents mathematical models TOPSIS and AHP methods, which was utilized on insulating state of distribution transformer to analyze and sensibility of individual measurements methods mutual comparison. We can uniquely determine the importance of these measurements methods with this mathematical apparatus in these measurements methods in insulating state of transformers.

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  • Observation Value Analysis – Integral Part of Bayesian Diagnostics

    The decision making process, in general, is understood as a process of selecting one of the available solutions to the problem. One of possible approaches supporting the process is Bayesian statistical decision theory providing a mathematical model to make decisions of a technical nature in conditions of uncertainty. Regarding above, a detailed subject of the research is to analyze the value of the observation, which is a part...

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  • Numerical analysis of elastic wave propagation in unbounded structures

    The main objective of this paper is to show the effectiveness and usefulness of the concept of an absorbing layer with increasing damping (ALID) in numerical investigations of elastic wave propagation in unbounded engineering structures. This has been achieved by the authors by a careful investigation of three different types of structures characterised by gradually increasing geometrical and mathematical description complexities....

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  • Thermal Analysis Of Hybrid Microchannel-Microjet Heat Exchanger

    Publication

    The paper presents the numerical investigation of a microjet- microchannel cooling module. In which microjets of water are impinging into the microchannels and forming a liquid film on the impingement surface. Applied technology takes benefits from two very attractive heat removal techniques. When laminar jets are impinging on the surface have a very high kinetic energy at the stagnation point, also in microchannels boundary layer...

  • Efficiency comparison of selected endoscopic video analysis algorithms

    In the paper, selected image analysis algorithms were examined and compared in the task of identifying informative frames, blurry frames, colorectal cancer and healthy tissue on endoscopic videos. In order to standardize the tests, the algorithms were modified by removing from them parts responsible for the classification, and replacing them with Support Vector Machines and Artificial Neural Networks. The tests were performed in...

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  • Tryton Supercomputer Capabilities for Analysis of Massive Data Streams

    The recently deployed supercomputer Tryton, located in the Academic Computer Center of Gdansk University of Technology, provides great means for massive parallel processing. Moreover, the status of the Center as one of the main network nodes in the PIONIER network enables the fast and reliable transfer of data produced by miscellaneous devices scattered in the area of the whole country. The typical examples of such data are streams...

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  • ANALYSIS OF THE INCREASE OF CONSTRUCTION COSTS IN URBAN REGENERATION PROJECTS

    The subject of this paper is the analysis and evaluation of the reasons for construction costs increases in urban regeneration projects. The analysis considers major refurbishments of real estates’, as well as heavy repair and modernization of the road system. For the period mentioned, the costs from works and expenditure schedules were compared with the costs of additional works, which shows the percentage cost increase in relation...

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  • IT PROJECT TEAMS CREATION AND ANALYSIS IN C2 NIWA ENVIRONMENT

    Publication

    Teams are the basic unit of the C2NIWA community, which – using the technical capabilities of this environment – focuses on the implementation of various projects. This article presents one of the competitions carried out within the framework of a C2NIWA project called Uwaga! Upadek! [Attention! Fall!], used as an example of a collaborative project for which analyses related to the assessment of teamwork based on the input-process-result...

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  • Schematiclab.com – A web tool for the design and analysis of electrical circuits

    Publication

    In this paper a useful Internet application for designing electronic systems is considered. A practical process of prototyping electronic devices by using such a dedicated web tool, hereinafter referred to as SchematicLab, is described. This solution, still in constant development, is now ready for use.

  • Schematiclab.com – A web tool for the design and analysis of electrical circuits

    Publication

    Along with a general progress in the modern computational tools, dynamic development of Internet applications using the cloud methodology and solutions is now observed. Clearly, also the applications installed locally, and being commonly used previously, are gradually gaining their counterparts in computational network clouds. The clouds have also brought new service sales opportunities. Namely, the service sales model based on...

  • CFD analysis of fluid flow through the labyrinth seal

    Steam and gas turbines are some of the fundamental means of power generation. The energy efficiency of the turbines, however, is not satisfactory. Ever since the start-up of the first turbine in the world, engineers have been striving for their increased efficiency. Multiple solutions to the problem of steam loss in an operating turbine are available. The use of seals is one of them. Empirical methods or numerical calculations...

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  • A novel method of time-frequency analysis: an essential spectrogram

    Publication

    A novel precise method of time-frequency analysis is presented. In the algorithm, a new energy distribution is estimated by simultaneously discard or displacement of the classical spec- trogram energy. A channelized instantaneous frequency and a local group delay are used in order to replacement in the same manner as formulated by Kodera et al. [1, 2]. Additionally, new representations: a channelized instantaneous bandwidth and...

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