The advancement in multimedia-based applications has sustained the need for more efficient ways to encode signals and images. Over the years, the Discrete Cosine Transform (DCT) has emerged as the most popular transform for many image and video coding applications. While implementing the DCT using finite-precision, approximation of the real-valued transform coefficients is required. It not only results in computational error, but also limits the quality of the reconstruction. An error-free encoding using algebraic integers has been shown to be an effective way of resolving the issue. The mapping technique – referred as Algebraic Integer Quantization (AIQ) – encodes the irrational basis functions using algebraic integers. This...
ISBN: 978-3-8433-7632-7
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Дата выхода: июль 2011
Die vorliegende Diplomarbeit ist in der Zeit zwischen Marz 2006 und Juli 2006 fur die Firma AEG|MIS in Ulm entstanden. Wahrend der Diplomarbeit wurde ich von allen Personen des Unternehmens, auf deren Hilfe und Erfahrung ich angewiesen war, hervorragend unterstutzt und konnte stets auf deren Hilfsbereitschaft zuruckgreifen. Mein besonderer Dank gilt den Mitarbeitern aus den Bereichen der Fertigungsleitung, Fertigungssteuerung und Verfahrensentwicklung, die mir stets auf unburokratische Art und Weise dabei geholfen haben, meine Ideen zu realisieren und die mit Ihrem Engagement dazu beigetragen haben, dass diese Diplomarbeit innerhalb der vorgegebener Zeit durchgefuhrt werden konnte Данное издание не является...
ISBN: 978-3-6391-6684-2
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Die vorliegende Arbeit beinhaltet Untersuchungen zum Tiefziehen mit Nachschieben von Werkstoff sowie dessen Weiterentwicklung zum Kragenziehen mit Nachschieben. Den Schwerpunkt bilden theoretische und experimentelle Untersuchungen zur Ermittlung von Verfahrensparametern und Verfahrensgrenzen sowie zu den erreichbaren Endteileigenschaften. Die Verfahrensgrenzen der Verfahrensvarianten Tiefziehen und Kragenziehen mit Nachschieben von Werkstoff wurden fur verschiedene Werkstoffe definiert. Die beim Umformvorgang eintretenden Formanderungen sowie die notwendigen Pressenkrafte sind ermittelt worden. Die verbesserten Gebrauchseigenschaften der hergestellten Werkstucke wurden uber die Endteileigenschaften wie beispielsweise den Verlauf der...
ISBN: 978-3-6390-0813-5
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Дата выхода: июль 2011
A method for the estimation of transient aerodynamic data from dynamic wind tunnel tests has been developed and employed in the study of the unsteady response of simple automotive type bodies. The experimental setup consists of the test model mounted to the oscillating model facility such that it is constrained to oscillate with a single degree of freedom of pure yawing motion. The yaw position is recorded from a potentiometer and the time response provides the primary measurement. Analysis of the wind-off and wind-on response allows the transient aerodynamic loads to be estimated. The frequency of oscillation is modified by altering the mechanical stiffness of the facility. The transient results are compared with a quasi-steady...
ISBN: 978-3-6393-0663-7
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Дата выхода: июль 2011
The present investigation deals with continuous ethanol production from date syrup by using a flocculent yeast. The main portion of the system consisted of a jacketed cylindrical Pyrex glass bioreactor where the date syrup was pumped from its base and the product was received from the top. Box-Wilson composite rotatable design was constructed to obtain the proper conditions of ethanol fermentation [temperature, date syrup concentration and feeding flow rate]. It is possible to obtain from this technique a polynomial equation which describes how these variables affect ethanol production. The optimum conditions are: Temperature: 29.5 C, Date syrup concentration: 64.47 mg/cm3, Feeding flow rate: 200 cm3/hr. The study shows that flocculent...
ISBN: 978-3-8383-6027-0
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Дата выхода: июль 2011
Les MPSoC (Multi-Processor System-on-Chip) visent l'integration des sous-systemes varies, materiels et logiciels, sur une seule puce. Ainsi, l'heterogeneite et les contraintes imposees pour la mise sur le marche rendent l'analyse en vue de l'evaluation des performances et de l'optimisation de ces systemes tres complexes. L'evaluation des performances est une etape clef dans n'importe quel flot de conception. En se basant sur les resultats de l'evaluation des performances, il est possible de prendre des decisions et de realiser des compromis pour l'optimisation du systeme global. La litterature prouve qu'une grande partie du temps de conception est passee dans l'evaluation des performances. De plus, les iterations dans le flot de...
ISBN: 978-6-1315-0710-6
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Дата выхода: июль 2011
Dieses Buch beinhaltet zwei verschiedene Themenblocke: Im ersten Schwerpunkt werden Methoden zur Ermittlung des state-of-the-art eines Technologiefeldes vorgestellt und beispielhaft anhand von metallischen Werkstoffen mit nanokristallinen Bereichen dargestellt. Der zweite Teil behandelt die objektive Auswahl einer Patentmanagementsoftware - PMS. Patentdokumente sind eine wertvolle Informationsquelle fur technische und rechtliche Fragestellungen. Um diese optimal auswerten, bearbeiten und verteilen zu konnen ist eine umfassende und effektive PMS notwendig. Ein weiterer Vorteil besteht in der Erfassung des spezifischen know-hows der Nutzer und des damit verbundenen Wissenstransfers im Sinne eines effizienten Wissenmanagements. Das Buch...
ISBN: 978-3-6390-3692-3
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Дата выхода: июль 2011
Das Produktdaten Management hat sich als IT-Schlusseltechnologie zur Produktivitatssteigerung in Fertigungsunternehmen etabliert. In Verbindung mit dem Einsatz von Enterprise Resource Planning Systemen (ERP) steht es im Zentrum des Computer Integrated Manufacturing Konzepts. Die Diplomarbeit erortert die elementaren Funktionen von PDM Systemen, klassifiziert die am Markt angebotenen Losungen und analysiert die Potentiale des PDM Einsatzes im Produktentwicklungsprozess. Im Anschluss wird der Reifegrad heimischer PDM Installationen in Anlehnung an eine Studie des osterreichischen Marktes besprochen. Anhand der fur AVL List GmbH realisierten Losung eines standortubergreifenden Einsatzes, werden die PDM Systemwahl und das...
ISBN: 978-3-6390-5068-4
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Дата выхода: июль 2011
Frederic P. Miller, Agnes F. Vandome, John McBrewster
Within a downstream processing system, several stages are used to further isolate and purify the desired product. The overall structure of the process includes pre-treatment, solid-liquid separation, concentration, and purification and formulation. Evaporation falls into the concentration stage of downstream processing and is widely used to concentrate foods, chemicals, and salvage solvents. The goal of evaporation is to vaporize most of the water from a solution containing a desired product. After initial pre-treatment and separation, a solution often contains over 85% water. This is not suitable for industry usage because of the cost associated with processing such a large quantity of solution, such as the need for larger equipment....
ISBN: 978-6-1306-3455-1
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Дата выхода: июль 2011
The modeling of mechanical systems can be defined as the mathematical idealization of the physical phenomena controlling it. This implies to define the input variables (geometrical parameters, loading conditions...) and the output variables (displacements, stresses...) allow us to understand the evolution of the mechanical system. Indeed, we cannot admit to use the deterministic models where only the average parameters are considered, because it generally leads to wrong representation of the reality. Hence, it is interesting to introduce the uncertainties in parameter evaluation and to consider their variability. The fundamental issue of probabilistic studies is therefore to take into account the uncertain character and the spatial...
ISBN: 978-3-8433-6680-9
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Книга по требованию
Дата выхода: июль 2011
Frederic P. Miller, Agnes F. Vandome, John McBrewster
Excavators are heavy equipment consisting of a boom (backhoe), bucket and cab on a rotating platform (known as a House). The House sits atop an undercarriage with tracks or wheels. All movement and functions of the excavator are accomplished through the use of hydraulic fluid, be it with Rams or Motors. Their design is a natural progression from the steam shovel. Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.
ISBN: 978-6-1306-1194-1
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Книга по требованию
Дата выхода: июль 2011
Frederic P. Miller, Agnes F. Vandome, John McBrewster
Exhaust gas or flue gas is emitted as a result of the combustion of fuels such as natural gas, gasoline/petrol, diesel fuel, fuel oil or coal. It is discharged into the atmosphere through an exhaust pipe, flue gas stack or propelling nozzle. It often disperses downwind in a pattern called an exhaust plume. Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.
ISBN: 978-6-1306-1485-0
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Дата выхода: июль 2011
This work is an experimental and numerical investigation of the flow induced vibration problem at blade passing frequencies of a high-pressure double volute boiler feed pump. The effects of variable operating conditions and different design modifications were studied by model testing to minimize the vibration level. The amplitude and strength of the pressure fluctuation inside the pump depend on the measuring location with respect to the interaction zone at volute tongues. The unsteady pressure fluctuations are very sensitive to the flow rate. Pressure fluctuations are increased at high rotational speeds and at off-design conditions. The original pump has a special V-shaped cut at the exit of impeller blades which reduces the pressure...
ISBN: 978-3-6392-8661-8
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Дата выхода: июль 2011
The book translates the contemporary biological and psychological conceptualizations of panic disorder (PD) into a computer simulation model using system dynamics (SD) technique. In doing so, it makes explicit the dynamic processes implicit in the narrative presentations of the literature through elaborative diagrams (mainly 'causal loop diagrams'). These diagrams provide a “blue print” for the stock and flow model development whose simulation tests show that the proposed structure (the brain system) in the PD theories is capable of generating the expected panicky behaviour. Though these tests further testify these theories, however, they also highlight some interesting “grey areas” that need further research. This whole effort...
ISBN: 978-3-6392-1352-2
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Книга по требованию
Дата выхода: июль 2011
Frederic P. Miller, Agnes F. Vandome, John McBrewster
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Francis James McDonald (August 3, 1922 – May 13, 2010) was an American engineer and business executive who worked his way up through the ranks at General Motors, ultimately serving as its president and chief operating officer from 1981 to 1987 during the tenure of chairman and chief executive Roger Smith. Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.
ISBN: 978-6-1338-0543-9
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Дата выхода: июль 2011
Axicons first appeared by this name in 1954, when all elements that focus light onto the axis were called axicons. The name "axicon" is a combination of the Greek words for axis and image. Cone shaped lenses are now commonly regarded as axicons. Their behavior and design possibilities are widely studied, yet primarily refractive axicons are used. The specific conical shape of the axicon makes them well suited for the generation of so-called Bessel beams. Lithography techniques have been developed, which allow for the manufacturing of arbitrary phase functions on planar substrates. Using this technology, a diffractive microaxicon can be manufactured if the necessary phase distribution is known. Therefore, a diffractive optical approach to...
ISBN: 978-3-6392-4566-0
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Дата выхода: июль 2011
In this book, a new high performance face recognition system based on matching the colour pixel statistics is introduced. A pre-processing phase is introduced and applied to segment faces from the background. Furthermore, a dedicated image equalization method is introduced and implemented to minimize the illumination problems of the images for further processing. The histogram of the segmented face image as pixel statistics feature is used for face recognition by cross correlating the histogram of a given face and the histograms of faces in the database. Alternatively the probability distribution functions of the images in different colour channels, together with the Kullback-Leibler Divergence/Distance (KLD) metric is also used for the...
ISBN: 978-3-6392-4704-6
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Книга по требованию
Дата выхода: июль 2011
Frederic P. Miller, Agnes F. Vandome, John McBrewster
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A facial recognition system is a computer application for automatically identifying or verifying a person from a digital image or a video frame from a video source. One of the ways to do this is by comparing selected facial features from the image and a facial -> database. It is typically used in security systems and can be compared to other -> biometrics such as -> fingerprint or eye iris recognition systems. Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.
ISBN: 978-6-1306-9945-1
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Книга по требованию
Дата выхода: июль 2011
Frederic P. Miller, Agnes F. Vandome, John McBrewster
High Quality Content by WIKIPEDIA articles! In audio engineering, a fade is a gradual increase or decrease in the level of an audio signal. The term can also be used for film cinematography or theatre lighting, in much the same way (see fade (filmmaking) and fade (lighting)). A recorded song may be gradually reduced to silence at its end (fade-out), Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.
ISBN: 978-6-1337-6186-5
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Книга по требованию
Дата выхода: июль 2011