Wyniki wyszukiwania dla: SHAPE%20FUNCTION - MOST Wiedzy

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Wyniki wyszukiwania dla: SHAPE%20FUNCTION

Wyniki wyszukiwania dla: SHAPE%20FUNCTION

  • Influence of transport policy on shape and function of public space

    Publikacja

    - Rok 2007

    Istotnym wyznacznikiem atrakcyjności miejsca jest dostępność, zdeterminowana przez skalę podażowej polityki transportowej oraz wielkość wskaźnika motoryzacji. Samochód, jako dobro powszechnie dostępne, wpłyną na zmianę zachowań społecznych mieszkańców oraz na percepcję, kształt i funkcjonowanie przestrzeni miejskich. Z jednej strony integruje tkankę miejską, a z drugiej okupując wolne przestrzenie, nie uwzględniając żadnych wyższych...

  • Shape Restoration of Deformed Egg-Shaped Single Layer Space Frames

    Publikacja

    - Rok 2019

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  • Roughness evaluation of turned composite surfaces by analysis of the shape of Autocorrelation Function

    Publikacja

    - MEASUREMENT - Rok 2023

    In this paper, the application of an Autocorrelation Function for the characterisation of surface topography was validated. The roughness evaluation of turned composite surfaces was supported by sophisticated studies of the Autocorrelation Function properties, considering especially the shape of the function. Details were measured with the optical method. The selection of the surface roughness evaluation procedures was carried...

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  • OIL SHALE

    Czasopisma

    ISSN: 0208-189X , eISSN: 1736-7492

  • Function

    Czasopisma

    eISSN: 2633-8823

  • Food & Function

    Czasopisma

    ISSN: 2042-6496 , eISSN: 2042-650X

  • A new duty cycles calculation method in pulse width modulation for direct matrix converters based on the shape function concept

    Publikacja

    - Rok 2013

    Paper presents a new approach to duty cycle calculation in pulse width modulation for direct matrix converters. The essence of the proposed method is the use of elementary shape function of finite element. The algorithm for calculating the duty cycles was reduced to simple operations on the coordinates of input and output voltage vectors without trigonometric functions.

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  • Entasis- shape of beauty

    Publikacja

    Two algorithms for the construction of entasis given by [2,3] are examined in this study. It has been shown, that those shapes are not an ellipse for which they were considered by the authors, but another curves.

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  • Entasis- shape of beauty

    Two algorithms for the construction of entasis given by [2,3] are examined in this study. It has been shown, that those shapes are not an ellipse for which they were considered by the authors, but another curves.

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  • A benchmark for particle shape dependence

    Publikacja
    • G. Combe
    • C. Nouguier-Lehon
    • E. Azéma
    • K. Szarf
    • B. Saint-Cyr
    • M. Chaze
    • F. Radjaï
    • P. Villard
    • J. Delenne
    • V. Richefeu... i 3 innych

    - Rok 2013

    Particle shape is a major parameter for the space-filling and strength properties of granular materials. For a systematic investigation of shape effect, a numerical benchmark test was set up within a collaborative group using different numerical methods and particles of various shape characteristics such as elongation, angularity and nonconvexity. Extensive 2D shear simulations were performed in this framework and the shear strength...

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  • Shape-Memory Polyurethane Polymers

    Publikacja

    - ACS SYMPOSIUM SERIES - Rok 2021

    Polyurethanes (PUs) are one of the most widely used polymers in research and industry. They can be synthesized from chemical sources and natural sources. PUs are a very useful class of polymers and exhibit many desirable properties that can be exploited in various applications. PUs are formed by the reaction between polyols and isocyanates. A wide variety of polyols and isocyanates are available for synthesis, and hence we can...

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  • Active shape models in practice

    Publikacja

    - Rok 2005

    Autorzy wykonali uniwersalny system lokalizacji obiektów zawierający implementację aktywnych modeli kształtu, a przeprowadzone z użyciem tego systemu eksperymenty wykazały powżne wady badanej metody. W pracy przedstawiono zaobserwowane w praktyce problemy związane ze stosowaniem metody aktywnych modeli kształtu (ASM).

  • The effect of the annual growth and the late wood share upon density of the Polish pine wood as a function of its origin

    W artykule przedstawiono zróżnicowanie gęstości polskiego drewna sosnowego (Pinus sylvestris L.) w zależności od udziału drewna późnego w przyroście rocznym z uwzględnieniem krainy pochodzenia drewna. Wspomniane zróżnicowanie jest w istotne statystycznie w skali globalnej oraz dla większości miejsc pochodzenia. Pomiar gęstości wykonano przy użyciu metody stereometrycznej. Metoda ta polegała na określeniu objętości pryzmy poprzez...

  • Face Recognition: Shape versus Texture

    Publikacja

    - Rok 2015

    This paper describes experiments related to the application of well-known techniques of the texture feature extraction (Local Binary Patterns and Gabor filtering) to the problem of automatic face verification. Results of the tests show that simple image normalization strategy based on the eye center detection and a regular grid of fiducial points outperforms the more complicated approach, employing active models that are able to...

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  • Emissivity Measurements on Shape Memory Alloys

    Publikacja

    - Rok 2016

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  • Surface shape reverse engineering with nurbs

    Publikacja

    - Rok 2009

    W artykule zaprezentowano algorytm, który interpoluje prostokątną tablice punktów w przestrzeni trójwymiarowej przy pomocy powierzchni NURBS. Algorytm oblicza parametry powierzchni NURBS tak, aby jak najwierniej oddać kształt opisany przez punkty. Do interpolacji punktów wybrano powierzchnię NURBS, jako najbardziej uniwersalny i najczęściej używany w programach CAD rodzaj powierzchni. Interpolowane punkty mogą pochodzić zarówno...

  • Shape Memory Materials from Rubbers

    Publikacja
    • A. Reghunadhan
    • P. Jibin
    • V. Kaliyathan
    • P. Velayudhan
    • M. Strankowski
    • S. Thomas

    - Materials - Rok 2021

    Smart materials are much discussed in the current research scenario. The shape memory effect is one of the most fascinating occurrences in smart materials, both in terms of the phenomenon and its applications. Many metal alloys and polymers exhibit the shape memory effect (SME). Shape memory properties of elastomers, such as rubbers, polyurethanes, and other elastomers, are discussed in depth in this paper. The theory, factors...

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  • Stesses in tank shell with shape deformation

    Publikacja

    - Rok 2003

    W referacie przedstawiono wyniki pomiarów naprężeń w płaszczy stalowego, rzeczywistego zbiornika. Pomiary przeprowadzono przy pomocy tensometrii elektrooporowej. Obiektem badań był stalowy zbiornik pionowy z dachem pływającym o pojemności nominalnej 12.000 m3. Defermacje płaszcza stalowego badanego obiektu wynoszą od -170 do +150 mm.

  • PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS

    Czasopisma

    ISSN: 0887-3585 , eISSN: 1097-0134

  • Correlation between shape errors in flat grinding

    Publikacja

    W pracy przedstawiono wyniki badań eksperymentalnych i symulacyjnych związanych z wpływem błędów kształtu narzędzia na błędy ksztaltu przedmiotu szlifowanego w układzie docierarki jednotarczowej. Szlifowanie realizowane było z wykorzystaniem specjalnych narzędzi z możliwością regulacji przekroju promieniowego.

  • Digital Photogrammetry in the Analysis of the Ventricles' Shape and Size

    Publikacja

    - Rok 2017

    This article presents spatial analyzes conducted to assess the potential of ReMake software to be used for medical purposes, with emphasis on the analysis of the shape and dimensions of the ventricles. To achieve this goal, the length of the sections measured with the ReMake and Image Master programs have been compared. RMS error was on the level of 1.2 mm. In addition to indicating the appropriateness of using this software, there...

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  • Particle shape dependence in 2D granular media

    Publikacja
    • C. Cegeo
    • B. Saint-Cyr
    • K. Szarf
    • C. Voivret
    • E. Azéma
    • V. Richefeu
    • J. Delenne
    • G. Combe
    • C. Nouguier-Lehon
    • P. Villard... i 3 innych

    - EPL-EUROPHYS LETT - Rok 2012

    Particle shape is a key to the space-filling and strength properties of granular matter. We consider a shape parameter eta describing the degree of distortion from a perfectly spherical shape. Encompassing most specific shape characteristics such as elongation, angularity and non-convexity, eta is a low-order but generic parameter that we used in a numerical benchmark test for a systematic investigation of shape dependence in sheared...

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  • Influences of grain shape and size distribution on permeability

    Publikacja

    - Rok 2015

    The present study investigates the effects of shape and size distributions of grains on the coefficient of permeability (k). A series of constant head permeability tests were performed to characterize the coefficient of permeability. Three particle size ranges (4.75- 0.075, 1.18- 0.075 and 0.300-0.075 mm) of two different sands (Narli Sand, Crushed Stone Sand) having different shapes were tested in a constant head permeability...

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  • Shaper-GA

    Publikacja

    - Rok 2018

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  • Underwater robot actuated by shape memory alloy wires

    Publikacja

    - Rok 2006

    W pracy przedstawiono koncepcję projektu robota podwodnego z napędem wykorzystującym materiały SMA ze stopów z pamięcią kształtu. Rozpatrywany układ ma budowę modułową złożoną z segmentów na podobieństwo do anatomicznej budowy dżdżownicy. Pojedyńczy segment składa się z dwóch okrągłych tarcz, pomiędzy którymi umieszczono balon wypełniony wodą. Wielkość balonu jest dopasowana w taki sposób do rozmiarów tarcz oraz długości sprężyn...

  • The analysis of hydrodynamic forces and shape of towrope for an underwater vehicle

    Publikacja

    Opisano metodę obliczania sił hydrodynamicznych oraz kształtu liny holującej pojazd podwodny pod wpływem sił indukowanych przez opływ wody wokół liny i pojazdu. Siły indukowane na linie obliczane są za pomocą równania Morison'a, natomiast siły i momenty na kadłubie pojazdu za pomocą współczynników sił hydrodynamicznych, zależnych od kątów natarcia i prękości holowania pojazdu. Przykłady obliczeń dla pojazdu podwodnego zostały wykonane...

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  • EXPERIMENTAL EVALUATION OF THE EMISSIVITY OF A NITI SHAPE MEMORY ALLOY

    Publikacja

    - Rok 2015

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  • Camera angle invariant shape recognition in surveillance systems

    Publikacja

    A method for human action recognition in surveillance systems is described. Problems within this task are discussed and a solution based on 3D object models is proposed. The idea is shown and some of its limitations are talked over. Shape description methods are introduced along with their main features. Utilized parameterization algorithm is presented. Classification problem, restricted to bi-nary cases is discussed. Support vector...

  • Shape resonance of the ethylene anion stabilized in a molecular trap

    Publikacja

    - Chemical Physics Letters - Rok 2003

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  • Multibeam data processing for 3D object shape reconstruction

    Publikacja

    The technology of hydroacoustic scanning offers an efficient and widely-used source of geospatial information regarding underwater environments, providing measurement data which usually have the structure of irregular groups of points known as point clouds. Since this data model has known disadvantages, a different form of representation based on representing surfaces with simple geometric structures, such as edges and facets,...

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  • Influence of the grains shape on the mechanical behavior of granular materials

    Publikacja

    - Rok 2009

    Discrete Element Method is a numerical method suitable for modeling geotechnical problems concerning granular media. In most cases simple forms of grains, like discs or spheres, are used. But these shapes are capable of soil behavior modeling up to a certain point only, they cannot reflect all of the features of the medium (large shear resistance and large volumetric change). In order to reflect the complex behavior of the real...

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  • Influence of grain shape on the mechanical behaviour of granular materials

    Publikacja

    - Rok 2009

    We performed series of numerical vertical compression tests on assemblies of 2D granular material using a Discrete Element code and studied the results in regard to the grain shape. The samples consist of 5000 grains made either of 3 overlapping discs (clump - grain with concavities) or of six-edged polygons (convex grain). These two types of grains have a similar external envelope, ruled with a geometrical parameter α. In the...

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  • Shape-Based Pose Estimation of Robotic Surgical Instruments

    Publikacja

    We describe a detector of robotic instrument parts in image-guided surgery. The detector consists of a huge ensemble of scale-variant and pose-dedicated, rigid appearance templates. The templates, which are equipped with pose-related keypoints and segmentation masks, allow for explicit pose estimation and segmentation of multiple end-effectors as well as fine-grained non-maximum suppression. We train the templates by grouping examples...

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  • Load Testing of GFRP Composite U-Shape Footbridge

    The paper presents the scope of load tests carried out on an innovative shell composite footbridge. The tested footbridge was manufactured in one production cycle and has no components made from materials other than GFRP laminates and PET foam. The load tests, performed on a 14-m long structure, were the final stage of a research program in the Fobridge project carried out in cooperation with: Gdańsk University of Technology (leader),...

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  • Application of Shape Memory Alloys in Pipeline Couplings for Shipbuilding

    Publikacja

    The aim of the study is to analyse shape memory alloy (SMA) pipeline joints in limited space applications for all kinds of ships. Generally, the space available in various areas on ships is strictly limited and service works usually meet many obstacles. If we consider a pipeline, the flange joints always require a larger free space around the pipe than the pipe alone. A simultaneous problem can occur with the propeller shaft line...

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  • Shape similarity to alphanumeric sign - proposition of new criterion.

    Publikacja

    - Rok 2005

    Artykuł opisuje różne podejścia do określania kształtu. Zawiera analizę ich użyteczności do wyznaczania podobieństwa do litery lub cyfry (znaku alfanumerycznego). Umiejętność sprawdzenia podobieństwa kształtu do znaku alfanumerycznego jest wymagana do oszacowania jakości wstępnego przetwarzania podczas automatycznego rozpoznawaniu maszynopisów. Konieczna jest również do znajdowania ''literopodobnych'' obszarów wśród innych kształtów...

  • Shape Memory and Superelasticity

    Czasopisma

    ISSN: 2199-384X , eISSN: 2199-3858

  • Shape and force control of cable structures with minimal actuators and actuation

    Publikacja

    - International Journal of Space Structures - Rok 2021

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  • Arterial cannula shape optimization by means of the rotational firefly algorithm

    The article presents global optimization results of arterial cannula shapes by means of the newly modified firefly algorithm. The search for the optimal arterial cannula shape is necessary in order to minimize losses and prepare the flow that leaves the circulatory support system of a ventricle (i.e. blood pump) before it reaches the heart. A modification of the standard firefly algorithm, the so-called rotational firefly algorithm,...

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  • Computer-aided reconstruction of the railway track axis geometrical shape

    In the paper a method of the railway track axis geometrical shape identification in a horizontal plane, directly from the continuous satellite measurements, is presented. In this method, an algorithm for the design of railway track sections located in the horizontal arc is used. The algorithm uses an analytical description of the layout by means of suitable mathematical formulas. The design procedure has a universal character and...

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  • Shape Optimisation of Kaplan Turbine Blades Using Genetic Algorithms

    Publikacja

    - Rok 2017

    This monograph is a comprehensive guide to a method of blade profile optimisation for Kaplan-type turbines. This method is based on modelling the interaction between rotor and stator blades. Additionally, the shape of the draft tube is investigated. The influence of the periodic boundary condition vs. full geometry is also discussed. Evolutionary algorithms (EA) are used as an optimisation method together with artificial neural...

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  • Variable-fidelity shape optimization of dual-rotor wind turbines

    Publikacja

    - ENGINEERING COMPUTATIONS - Rok 2018

    Purpose Dual-rotor wind turbines (DRWTs) are a novel type of wind turbines that can capture more power than their single-rotor counterparts. Because their surrounding flow fields are complex, evaluating a DRWT design requires accurate predictive simulations, which incur high computational costs. Currently, there does not exist a design optimization framework for DRWTs. Since the design optimization of DRWTs requires numerous model...

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  • Optimum shape of turnout diverging track with segments of variable curvature

    In the paper an attempt has been made to focus on shaping the variable curvature in the diverging track of the railway turnout. Basing on some earlier studies, solutions provided with a circular arc in the mid-zone, and in the extreme regions with segments of non-linear curvature of equal length and zero curvature at the start and end of the turnout, have been assumed as models. The most advantageous type of curvature has been...

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  • Minimum drag shape bodies moving in inviscid fluid - revisited

    This paper presents the classic approach to minimum drag shape body problem, moving at hypersonic speeds, leading to famous power law shapes with value of the exponent of 3/4. Two- and three-dimensional cases are considered. Furthermore, an exact pseudo solution is given and its uselessness is discussed. Two new solutions are introduced, namely an approximate solution due to form of the functional and solution by means of optimisation...

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  • Shape and force control of cable structures with minimal actuators and actuation

    Publikacja

    - International Journal of Space Structures - Rok 2021

    Shape adjustment and stress control can be considered as one of the effective parameters in prestressed cable structures since such structures are widely constructed nowadays due to their characteristics. The assembly errors and applied loads hugely affect the cables’ nodal positions and stress due to their delicacy. The former could disturb the shape, which affects the appearance and the function of the structure. In contrast,...

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  • Damage detection in plates based on Lamb wavefront shape reconstruction

    Publikacja

    - MEASUREMENT - Rok 2021

    Many of the current studies in the area of damage detection using elastic wave propagation are based on deploying sensor networks with a large number of piezoelectric transducers to detect small-size cracks. A major limitation of these studies is that cracks are usually larger and have different shapes in real cases. Moreover, using a large number of sensing nodes for damage detection is both costly and computationally intensive....

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  • Viewpoint independent shape-based object classification for video surveillance

    Publikacja

    A method for shape based object classification is presented.Unlike object dimension based methods it does not require any system calibration techniques. A number of 3D object models are utilized as a source of training dataset for a specified camera orientation. Usage of the 3D models allows to perform the dataset creation process semiautomatically. The background subtraction method is used for the purpose of detecting moving objects...

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  • Analysis of size and shape of abrasive micrograins in lapping of assembly joints

    Przedstawiono skomputeryzowana analizę wielkości i kształtu mikroziaren ściernych. W badaniach mikroziaren węglika boru, węglika krzemu i elektrokorundu zastosowano mikroskopie optyczna oraz specjalistyczne oprogramowanie MultiScan v.6.08

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  • Tailoring the Size and Shape—New Path for Ammonium Metavanadate Synthesis

    Ammonium metavanadate, NH4VO3, plays an important role in the preparation of vanadium oxides and other ammonium compounds, such as NH4V3O8, (NH4)2V3O8, and NH4V4O10, which were found to possess interesting electrochemical properties. In this work, a new route for the synthesis of NH4VO3 is proposed by mixing an organic ammonium salt and V2O5 in a suitable solvent. The one-step procedure is carried out at room temperature. Additionally,...

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  • Electrical properties of ceria films prepared by net shape technology

    Publikacja

    - Rok 2005

    W pracy przedtswiono procedurę przygotowania gęstych warstw elektrolitu z wykorzystaniem technologii Net Shpe. Technologia ta na znaczne obniżenie temperatury przygotania tego typu warst. Okresloślono parametry elektryczne warst domieszkowanego ceru przygotowanych w tej technologii.