Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! A nuclear submarine is a submarine powered by a nuclear reactor. The performance advantages of nuclear submarines over "conventional" (typically diesel-electric) submarines are considerable: nuclear propulsion, being completely independent of air, frees the submarine from the need to surface frequently, as is necessary for conventional submarines; the large amount of power generated by a nuclear reactor allows nuclear submarines to operate at high speed for long durations; and the long interval between refuellings grants a range limited only by consumables such as food. Current generations of nuclear submarines never need to be refueled throughout their 25-year lifespans. Данное...
ISBN: 978-6-1304-4619-2
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Книга по требованию
Дата выхода: июль 2011
A method of analysis has been developed to simulate the behaviour of composite floors exposed to fire. The governing differential equation, based on the orthotropic plate theory, is solved by the finite difference method.The solution requires the calculation of plate rigidities as influenced by the thermo-mechanical properties of the materials. This is achieved by first calculating the temperature distribution in the floor. Numerical integration of stresses calculated from non-thermal strains, compatible with the appropriate temperature dependent stress-strain relations, enables determination of the stress-resultants (moments and forces). Equilibrium of in-plane forces is satisfied first. The resulting moments and curvatures enable the...
ISBN: 978-3-6393-1188-4
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Книга по требованию
Дата выхода: июль 2011
There are a number of civil engineering structures, for which circular and ring footings are often employed. The bearing capacity was computed for a rough circular and ring footings by using the method of characteristics. Rapid urbanization coupled with scarcity of land force several structures to come up ever closer to each other, which may sometime cause severe damage to the structures and therefore, a need is felt to devise simplified methods to capture the effect of footing interference. The ultimate bearing capacity of two interfering strip footings was obtained by using the method of characteristics and the upper bound limit analysis. The determination of the ultimate bearing capacity of shallow to deep footings must incorporate...
ISBN: 978-3-6392-3134-2
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Книга по требованию
Дата выхода: июль 2011
The book deals with an important and complex issue in geotechnical and earthquake engineering, which concerns the influence of both plasticity and pore water pressure on the influence of the seismic response to real earthquake records. Analyses are carried using the software FLAC3D. The book includes three parts: The first chapter presents a literature review of research on earth dams. It presents observation during earthquake loading, the different methods of seismic analysis of earth dams, such as the simplified methods, the empirical methods, the equivalent-linear analyses and the non linear methods. The second chapter presents a numerical analysis of the seismic behaviour of earth dams. Analysis is conducted for the solid phase. It...
ISBN: 978-3-8383-1215-6
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Книга по требованию
Дата выхода: июль 2011
This thesis presents the analytically predicted position, motion, attitude, power output and forces on Florida Atlantic University's (FAU) first generation ocean current turbine for a wide range of operating conditions. These values are calculated using a seven degrees of freedom dynamic simulation of the turbine and the cable that attaches it to the mooring system. The numerical simulation modifications and upgrades completed in this thesis include developing a wave model including the effects of waves into the simulation, upgrading the rotor model to specify the number of blades and upgrading the cable model to specify the number of cable elements. This enhanced simulation is used to quantify the turbine's performance in a wide range...
ISBN: 978-3-6393-2226-2
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Книга по требованию
Дата выхода: июль 2011
In coal mines, a portion of the coal is left in pillars to support the great weight of the overburden and to provide stability to the immediate roof and floor of the openings for ingress and egress. The main drift and the shaft are generally the main access for men and materials to the mine, and the main conduit for coal transport from the mine; therefore, protection of the main drift and shaft is crucial through the mine life. It will give a additional benefit to extract the safety pillars those are used to provide stability for main drift and shaft as far as economy and production is concerned. For this reason, it is important to mine these safety pillars. For this purpose above mentioned, the stress and deformations due to mining...
ISBN: 978-3-8383-5542-9
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Книга по требованию
Дата выхода: июль 2011
Extrusion technology is widely applied in various processing (e.g. plastics, foods, pharmaceutical, rubber, and other high viscous materials) because this process combines heating, shearing, mixing and shaping in one unit operation. In food industries, twin-screw extrusion processing has played important role to fulfill the market demand of convenient food products (e.g. ready-to-eat puffed cereals and low density, expanded snack food). Therefore, understanding of twin-screw extrusion is essential for further food products development. The design and optimization of the extrusion processing has been going by trial and error experimental method, which is time consuming and requires great efforts. Moreover this method does not provide...
ISBN: 978-3-8383-3451-6
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Книга по требованию
Дата выхода: июль 2011
Derzeit basiert die Dimensionierung von Spritzkopfen bei der Extrusion von Gummiprofilen ausschliesslich auf empirischem Wissen uber nichtlineare Fliessverhalten und die strukturviskosen Eigenschaften der Elastomere. Die Auslegung eines Spritzkopfes erfolgt daher in Abhangigkeit von der verwendeten Gummimischung. Die Auslegung des die Form eines Extrusionsprofils bestimmenden Werkzeugs hangt entscheidend von der Strangaufweitung der Kautschukmischung ab. Das bedeutet, dass die Profilgeometrie des Produkts nicht mit der Geometrie des Werkzeugs identisch ist. Die endgultige Produktgeometrie wird daher durch empirische Adaptierungen am Werkzeug erreicht. Die Beseitigung der zuvor genannten Schwachstellen wird durch die Entwicklung eines...
ISBN: 978-3-8381-2126-0
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Книга по требованию
Дата выхода: июль 2011
NURBS (Non-Uniform Rational B-Spline) surface has gained acceptance and popularity for describing and modeling curves and surfaces, and eventually it has become a standard for parametric curve and surface description in large scale manufacturing or in Reversed Engineering where CAD/CAM techniques are employed. This book uncovers a method to reconstruct a free-form surface model for industrial application such as car bodies, ship hulls, or aircraft fuselages, etc., by integrating a photogrammetric method and NURBS. A thorough illustration of how a free form surface can be reconstructed by using stereo images is given. Данное издание не является оригинальным. Книга печатается по...
ISBN: 978-3-8433-5896-5
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Книга по требованию
Дата выхода: июль 2011
Die Kalkulation, Auslegung, Anfertigung und Errichtung von oberirdischen zylindrischen Lagertanks stellt eine komplexe Anforderung dar und setzt umfassende Erfahrungen in den jeweiligen Fachgebieten voraus. Um eine optimale, kotengunstige Ausfuhrungsvariante zu wahlen sind detailierte Kenntnisse der Einflussfaktoren auf die Art und Ausfuhrung der Bauwerke erforderlich. In diesem Werk werden anhand von konkreten durchgerechneten Beispielen die Gesamtkosten fur die beispielhaften Baugrossen von 1000m bis 5000m von der statischen Berechnung bis zur Gesamtkostenermittlung in den verschiedenen Ausfuhrungsvarianten behandelt. Das Buch richtet sich an Einkaufer, Kostenrechner, Konstrukteure und Techniker sowie Entscheidungstrager welche sich...
ISBN: 978-3-6391-2132-2
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Книга по требованию
Дата выхода: июль 2011
Bovine lameness due to hoof and leg ailments causes significant economic losses to the dairy industry and it is an important animal welfare issue of great concern. Cow lameness necessitates medical treatment, reduces milk production, affects body condition, impairs reproduction performance, and impacts animal well being. Today, early detection of hoof and leg ailments is not a reality for most farmers as they can record an incidence only at the stage when the cow is visibly crippled. This book explains the development of a novel system designated as the Reaction Force Detection (RFD) system. The system has a walkthrough layout with an initial step-up and two parallel, left and right floor plates that are each supported by four load...
ISBN: 978-3-8383-8729-1
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Книга по требованию
Дата выхода: июль 2011
Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! Oceanlinx is a Wave Energy Converter device , that is a device which uses wave energy and converts it into electrical energy operating on the oscillating water column principle. The Oceanlinx was developed in Australia. The technology has developed greatly in the past ten years thanks to the large amount of international funds it has received. It uses advanced oscillating column technology to extract the energy from the waves. This device uses Renewable Energy. Wave power is the transport of energy by ocean surface waves, and the capture of that energy to do useful work — for example for electricity generation, water desalination, or the pumping of water (into reservoirs). Wave power is...
ISBN: 978-6-1311-3035-9
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Книга по требованию
Дата выхода: июль 2011
Nach wie vor ist das Erdol der bedeutendste Energietrager. Prognosen zufolge ist mit einer Energienachfrage zu rechnen, die sich im Jahre 2030, verglichen mit dem heutigen Bedarf, fast verdoppeln wird. Dominierend wird voraussichtlich immer noch die Nachfrage nach Erdol sein. Zusammen mit dem Erdgas werden beide Rohstoffe die Halfte des Energiebedarfs decken. In der heutigen Zeit gewinnt die Offshore-Forderung von Ol und Gas zunehmend an Bedeutung. Konzentrierte sich lange Zeit die Forderung zunachst nur auf wenige Regionen, werden heute maritime Gebiete weltweit erschlossen. Mit dem Vordringen in neue Fordergebiete, in zunehmend unwirtlicheren Gegenden, steigen auch die Anforderungen an die Bohr- und Fordereinheiten sowie an die...
ISBN: 978-3-6393-0543-2
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Книга по требованию
Дата выхода: июль 2011
This study addresses oil bypassing caused by water invasion to wells in edge and bottomwater-drive oil reservoirs – a significant problem worldwide. It is shown that the amount of by-passed (not recovered) oil is significant and could be predicted analytically and reduced by modifying well's completion. A large statistical sample from the population of possible reservoir-well systems with edge and bottom-water has been created theoretically using several databases of actual reservoirs properties worldwide. Dimensional analysis allowed converting reservoir properties distributions into dimensionless group distributions. Then, the amount of by-passed oil was correlated with the dimensionless groups using designed experiments conducted on...
ISBN: 978-3-6390-6442-1
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Книга по требованию
Дата выхода: июль 2011
Depth Sensing Indentation (DSI) is used in the mechanical characterization of bulk and coated materials. The finite element method is used to perform three-dimensional numerical simulations of Vickers hardness tests. The modelling and the optimisation of the more significant parameters in the simulation of this test are treated in detail. The load-unloading curves are carefully studied and the indentation geometry is related to the material mechanical properties. For the case of bulk materials, different reverse analysis methodologies for evaluate the stress-plastic strain curve from the load-unloading indentation curve, are presented. A detailed study of indentation geometry and stress and strain distributions is performed on coated...
ISBN: 978-3-6392-7486-8
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Книга по требованию
Дата выхода: июль 2011
Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! An operating engineer is a tradesman who operates heavy machinery. There are two main types of workers sharing this title and trade union affiliation (International Union of Operating Engineers). The first group are workers who operate steam plants or boilers. These are generally called stationary engineers but are known by other titles such as boiler operators, thermal technicians and power engineers. The second group is a larger class who drive and operate cranes and engineering vehicles such as bulldozers and graders used in construction and engineering projects. Данное издание не является оригинальным....
ISBN: 978-6-1311-0310-0
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Книга по требованию
Дата выхода: июль 2011
In this book wavelength division multiplexing (WDM) and dense WDM (DWDM) systems are designed. The practical components of WDM system models have been simulated through software to understand the behavior of these components and overall system considerations because of the role played by these components in the transmission processes (e.g., optical fiber, continuous wave laser diode (CW) and multiplexer (MUX)). Two types of amplifiers (Raman Amplifiers and Erbium Doped Fiber Amplifiers) are studied that are used to amplify the optical signals. Ultra wideband WDM system is proposed in this book. The total 3-dB spectral range obtained is equal to 83-nm as compared with 75-nm that is obtained today. An improved gain-flatness (7 dB as...
ISBN: 978-3-8433-7948-9
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Книга по требованию
Дата выхода: июль 2011
The industrial production of garments and similar textile end products is an activity with roots back to the 19th century that has profited immensely from continuous technological developments since its first emergence. However, several characteristics of the materials that are processed give rise to technical issues that are difficult to objectively manage and control. The machines, although often equipped with complex devices to aid in material handling, are blind regarding the process itself; they run with an initial set-up and are neither capable of adapting to varying sewing conditions nor can they detect anomalous operation. This work intends to measure and analyse several sewing variables in-process, in order to develop objective...
ISBN: 978-3-6392-9514-6
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Книга по требованию
Дата выхода: июль 2011
The pulverization mechanism of low-cross-link-density natural rubber in Sold State Shear Extrusion is the objective of this work. Although the results support the rotating speed of the screw has a great impact on the produced particle size, the process has to be applied in a certain range of the temperature and normal stress depended on the material. A non-monotonic behavior between the particle size and set temperature in different heating zones were observed. The results show carbon black causes a non-monotonic behavior. Based on this observation, it is concluded that the mechanical properties of material have a great impact in the pulverization process. We also developed a Gaussian slip-link model for non-filled polymer networks. The...
ISBN: 978-3-6390-5592-4
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Книга по требованию
Дата выхода: июль 2011
Submarine activities have increased steadily in the last forty years all over the world. In Brazil, many unmanned underwater vehicles have been used in delicate, precise and risky tasks in the oil industry. Due to strategic economical interest, a Semi-Autonomous Underwater Vehicle (SAUV) is being developed at the Univ. of Sao Paulo (USP). This work presents the development of a Robust Control System, which will be embedded in the SAUV. The controller synthesis is based in a Tracking System fed by a State Estimator. The controller is able to keep the vehicle in a desired trajectory and also shows very good performance in activities involving Dynamic Positioning. To develop the controller, an interactive methodology was used, until a...
ISBN: 978-3-6392-4545-5
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Книга по требованию
Дата выхода: июль 2011
One of the problems faced by planners when designing an expansion plan for water resource systems is selecting the sequence of projects that satisfies a given demand at minimum cost, some prescribed time in the future. There is also a need to develop hydropower that is economically, socially, and environmentally sustainable. This book introduces optimal scheduling that minimizes net present cost by applying dynamic programming. At the same time this book has made a basis to follow this decision-making system for plants to be constructed in the future. This systematic analysis helps those who want to determine an optimal plan for the expansion of an electric power system, and should be especially useful to professional Данное...
ISBN: 978-3-6392-8127-9
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Книга по требованию
Дата выхода: июль 2011
A new methodology, called predictive dynamics, is introduced in this work to simulate human walking using a spatial digital human model. The digital human model has 55 degrees of freedom. The resultant action of all the muscles at a joint is lumped and represented by the torque at each degree of freedom. In addition, the cubic B-spline interpolation is used for time discretization and the well- established robotic formulation of the Denavit- Hartenberg (DH) method is used for kinematics analysis of the mechanical system. The recursive Lagrangian formulation is used to develop the equations of motion. The ground reaction forces (GRF) are obtained from a novel two-step active- passive algorithm. The problem is formulated as a nonlinear...
ISBN: 978-3-6393-2841-7
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Книга по требованию
Дата выхода: июль 2011