Frederic P. Miller, Agnes F. Vandome, John McBrewster
A compressor stall is a situation of abnormal airflow resulting from a stall of the aerofoils within the compressor. Stall is found in dynamic compressors, particularly axial compressors, as used in jet engines and turbochargers for reciprocating engines. Compressor stalls result in a loss of compressor performance, which can vary in severity from a momentary engine power drop (occurring so quickly it is barely registered on engine instruments) to a complete loss of compression (compressor surge) necessitating a reduction in the fuel flow to the engine. Modern compressors are carefully designed and controlled to avoid or limit stall within an engine's operating range. Stall was a common problem on early jet engines with simple...
ISBN: 978-6-1307-1056-9
Издательство:
Книга по требованию
Дата выхода: июль 2011
Frederic P. Miller, Agnes F. Vandome, John McBrewster
High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! A compressed air engine is a pneumatic actuator that creates useful work by expanding compressed air. They have existed in many forms over the past two centuries, ranging in size from hand held turbines up to several hundred horsepower. Some types rely on pistons and cylinders, others use turbines. Many compressed air engines improve their performance by heating the incoming air, or the engine itself. Some took this a stage further and burned fuel in the cylinder or turbine, forming a type of internal combustion engine. Данное издание не является оригинальным. Книга печатается по...
ISBN: 978-6-1339-3853-3
Издательство:
Книга по требованию
Дата выхода: июль 2011
Frederic P. Miller, Agnes F. Vandome, John McBrewster
High Quality Content by WIKIPEDIA articles! Invente aux Etats-Unis par Dorr E. Felt en 1887, le Comptometre, ou Comptometer est la premiere machine a calculer a clavier direct a avoir connu un succes commercial reel. Un clavier direct est extremement rapide car chaque touche ajoute ou soustrait sa valeur au total des qu'elle est enfoncee et tous les doigts de la main peuvent etre utilises simultanement. C'est ainsi que le Comptometre fut appele la mitrailleuse du bureau dans des publicites de la Premiere Guerre mondiale. La machine possede un levier, mais il n'est utilise que pour sa remise a zero. Depuis sa commercialisation en 1887, il est ameliore constamment; d'abord en le rendant plus fiable et plus rapide, puis avec un modele...
ISBN: 978-6-1341-2317-4
Издательство:
Книга по требованию
Дата выхода: июль 2011
Clinical practice is increasingly replacing traditional open surgical procedures with minimally invasive techniques for cancer diagnosis and therapy. These procedures typically require placement of a surgical instrument into the organ of interest with a high degree of accuracy. In general, the success of a treatment or of a diagnosis is highly dependent on the accuracy of instrument insertion and thus depends crucially on the skills and the experience of the physician. While intra-operative navigation has been proven to be highly effective in interventions on bony or sufficiently rigid structures, such as the spine and the brain, computer-assisted soft tissue procedures are still limited to non-invasive diagnostics and surgical planning....
ISBN: 978-3-8381-0848-3
Издательство:
Книга по требованию
Дата выхода: июль 2011
The efficiency of crane operations in construction may significantly impact on the schedule and cost of a construction project. This book presents computational methods required to simulate crane activities with goal of improving crane erection processes. A computer system that integrates the computational methods is developed. This system is referred to as iCrane, which stands for intelligent crane, and is for use both before and during erection. At its core, the computer system allows users to simulate the erection process virtually, prior to field operations. These methods can potentially benefit many construction practitioners: engineers for crane selection or crane placement; logistics planners for generating precise and detailed...
ISBN: 978-3-6391-0351-9
Издательство:
Книга по требованию
Дата выхода: июль 2011
Flow problems with free and moving boundaries are encountered in many engineering applications. Flow in dams, pollutant transport in unconfined aquifers, viscous flow on the ocean free surface, molten metal flows, casting, sloshing in tanks, oil recovery, and open channel flows are examples in this category. In modeling steady and unsteady flow with viscous fluid interfaces, the location of the interface is also a part of the overall solution and needs to be determined. Accurate representation of the interface is one of the major challenges in simulation of this class of fluid dynamics problems, particularly when the flow has nonlinear characteristics. The finite element method (FEM), based on an approximation of field variables over a...
ISBN: 978-3-6390-8777-2
Издательство:
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. Computational genomics refers to the use of computational analysis to decipher biology from genome sequences and related data, including both DNA and RNA sequence as well as other "post-genomic" data (i.e. experimental data obtained with technologies that require the genome sequence, such as genomic DNA microarrays). As such, computational genomics may be regarded as a subset of bioinformatics, but with a focus on using whole genomes (rather than individual genes) to understand the principles of how the DNA of a species controls its biology at the molecular level and beyond. Данное издание не...
ISBN: 978-6-1337-3072-4
Издательство:
Книга по требованию
Дата выхода: июль 2011
This work aims to set up an analytical framework that supports the design of multinational organizations based on cultural constraints. Besides serving as a design aid, the analytical framework enables one to test hypotheses related to the effects of cultural heterogeneity on organizational outcome. Throughout this study, the heterogeneous coalition organization design problem has been formulated as a Multi-level Distributed Intelligence System in which decision making nodes are culturally uniform sub-groups. A bottom-up design methodology has been developed that exploits results from Lattice Theory, and applies a new concept named group-organization fit. A case study is used (1) to illustrate the use of the methodology to design and...
ISBN: 978-3-6390-2284-1
Издательство:
Книга по требованию
Дата выхода: июль 2011
Minimal-invasive Verfahren besitzen in der Medizin mittlerweile einen unbestritten hohen Stellenwert. Im Entwicklungsinstitut der Arbeitsgemeinschaft fur Osteosynthesefragen (AO) wurde ein Projekt durchgefuhrt, das sich mit computerunterstutzter, minimal-invasiver Chirurgie befasst. Das Ziel des gesamten Projekts war es, mit Hilfe eines computergesteuerten Roboters eine moglichst exakte Reposition von Knochenstucken nach einer Fraktur zu gewahrleisten. Dieses Buch beschreibt einen kleinen Teil des Projekts: die Entwicklung und Konstruktion eines Verbindungsstucks zwischen dem Roboter und dem menschlichen Knochen. Данное издание не является оригинальным. Книга печатается по...
ISBN: 978-3-6391-4755-1
Издательство:
Книга по требованию
Дата выхода: июль 2011
Construction materials research and the prediction of the performance of civil engineering structures mandate the use of the best computational modeling tools. Conventional continuum models have limited applications to quasibrittle structures. Silling in 1998 proposed a general theoretical framework called the peridynamic model. This model was formulated in order to correct the shortcomings of continuum models. However only materials with a fixed value of the Poisson's ratio can be modeled with Silling's original formulation. In the present work Silling's peridynamic model is improved with the formulation of the micropolar peridynamic model. The micropolar peridynamic model is a generalization of the original peridynamic model. In this...
ISBN: 978-3-6391-8424-2
Издательство:
Книга по требованию
Дата выхода: июль 2011
Die Planung eines Bauwerks im konstruktiven Ingenieurbau erfordert eine enge Kooperation zwischen den Fachplanern. Durch eine kooperative und interaktive Simulation von Entwurfs- und Konstruktionsvarianten der einzelnen Fachmodelle uber einen gemeinsamen virtuellen Entwurfsraum soll eine gegenseitige Verstandigung verbessert werden. Durch die schrittweise Modifizierung eines IFC Produktmodells ist eine interaktive Optimierung moglich. Der virtuelle Entwurfsraum wird als Softwarelosung realisiert und koppelt Module zur dreidimensionalen Modellierung (CAD), Simulation (CFD) und Visualisierung (Virtual Reality), welche fur einen interaktiven Prozessablauf uber automatisierte Schnittstellen verknupft sind (Computational Steering). Das...
ISBN: 978-3-8364-8453-4
Издательство:
Книга по требованию
Дата выхода: июль 2011
Frederic P. Miller, Agnes F. Vandome, John McBrewster
The most widely-studied form of computability is Turing computability, which is computability via a Turing machine. However, many other forms of computability are studied as well. Computability notions weaker than Turing machines are studied in automata theory, while computability notions stronger than Turing machines are studied in the field of hypercomputation. Apart from the bare question of what problems can be effectively solved, computer scientists are also interested in the resources, such as time and memory, that are required to solve problems using different models of computation. Models of parallel computation, for example, are of interest for their speed of computation, even though any problem solvable by parallel computation...
ISBN: 978-6-1302-0513-3
Издательство:
Книга по требованию
Дата выхода: июль 2011
Frederic P. Miller, Agnes F. Vandome, John McBrewster
High Quality Content by WIKIPEDIA articles! A computer fan is any fan inside a computer case used for cooling purposes, and may refer to fans that draw cooler air into the case from the outside, expel warm air from inside, or move air across a heatsink to cool a particular component. The use of fans to cool a computer is an example of active cooling. Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.
ISBN: 978-6-1317-0456-7
Издательство:
Книга по требованию
Дата выхода: июль 2011
Frederic P. Miller, Agnes F. Vandome, John McBrewster
Computer-assisted dispatch, also called Computer Aided Dispatch, is a method of dispatching taxicabs, couriers, field service technicians, or emergency services assisted by computer. It can either be used to send messages to the dispatchee via a mobile data terminal and/or used to store and retrieve data. A dispatcher may announce the call details to field units over a two-way radio. Some systems communicate using a two-way radio system's selective calling features. CAD systems may send text messages with call-for- service details to alphanumeric pagers or wireless telephony text services like SMS. The central idea is that persons in a dispatch center are able to easily view and understand the status of all units being dispatched. CAD...
ISBN: 978-6-1306-7661-2
Издательство:
Книга по требованию
Дата выхода: июль 2011
A computational study of drops, capsules, cells and their emulsions is presented here motivated by their diverse applications in industries and biological science. Particle deformation is the focus of this study. Front-tracking method is developed to investigate deformation and interactions. Inertia-induced drop behavior gives rise to unusual rheological responses such as shear thickening and a sign change of normal stresses in shear, and a negative elastic modulus in an oscillating extensional flow. Simulation is also applied to explore the mechanics of capsules and biological cells with constitutive models for membrane elasticity and molecular adhesion incorporated into the numerical framework. Cell deformation induces a hydrodynamic...
ISBN: 978-3-6390-7008-8
Издательство:
Книга по требованию
Дата выхода: июль 2011
This writing addresses the problem of bringing the perspectives of psychology and sociology about human behavior in emergencies into computational models for egress analysis. Efficacious analysis of emergency egress is facilitated by incorporation of diverse human behavior into a Multi-Agent Simulation System for Egress analysis (MASSEgress). MASSEgress adopts a multi-agent based simulation paradigm to model evacuees as individual agents equipped with sensors, brains and actuators. Individual behavior is simulated through modeling of sensing, decision-making, behavior selection and motor control. Social behavior is simulated through modeling of individual behavior and interactions among individuals. Competitive, queuing, herding, and...
ISBN: 978-3-8383-1120-3
Издательство:
Книга по требованию
Дата выхода: июль 2011
A 3D forest road alignment model, aided by an interactive computer system, was developed to design a path with the lowest total construction, maintenance, and transportation costs, while conforming to design specifications, environmental requirements, and driver safety. The contributions of the model are: enhancing data input and user efficiency through a 3D graphic interface and automated horizontal and vertical curve fitting routines, cross section generation, and cost routines for construction, maintenance, and vehicle use; ensuring road feasibility by considering terrain conditions, geometric specifications, and driver safety; enhancing economic efficiency by combining modern optimization techniques to minimize earthwork allocation...
ISBN: 978-3-6391-5464-1
Издательство:
Книга по требованию
Дата выхода: июль 2011
In-flight icing occurs mostly during airplane take-off and approach where the airplane ground speed is still low enough to permit ice accretion, due to supercooled water droplets impingement. If unaddressed, such occurrences can be fatal. The problem is compounded by the large power requirements during take-off and landing which might affect the ice protection systems performance adversely. In this work, the Eulerian-Eulerian 3-D approach to calculating water droplet impingement is presented, with validation results in both 2-D and 3-D. A 3-D analysis is also carried out over a Convair-580 nose and cockpit geometry. This full-scale 3-D analysis is a simulation of a flight segment of the Canadian Freezing Drizzle Experiment as conducted...
ISBN: 978-3-8383-2552-1
Издательство:
Книга по требованию
Дата выхода: июль 2011
High Quality Content by WIKIPEDIA articles! While the discipline of Aeroacoustics is definitely dated back to the first publication of Sir James Lighthill in the early 1950s, the origin of Computational Aeroacoustics can only very likely be dated back to the middle of the 1980s. Probably the term Computational Aeroacoustics entered the field with a publication of Hardin and Lamkin who claimed, that
A lot of attention has been paid to car engines in order to improve their power, torque and efficiency. Also, the fuel economy and emissions have to be reduced to match the environmental regulation targets. To achieve these objectives, many experimental investigations and validations of flows inside internal combustion (IC) engines have been conducted in the last two decades. However, research in this field remains limited. Previous studies conducted on IC engines imposed a number of assumptions for Computational Fluid Dynamics (CFD) simulations to simplify either the geometries or flow conditions, or both. This work seeks to reduce the number of assumptions made in previous engine studies by using an engine laser scan. The geometric...
ISBN: 978-3-6391-9535-4
Издательство:
Книга по требованию
Дата выхода: июль 2011
Design is functionality driven. All products and parts have some intended reason behind their existence. This book introduces a methodology to assist designers during the first stages of design. This methodology provides a tool to help the designer translate functional specifications into conceptual forms. This tool serves as a bridge between the conceptual design phase and the detailed design phase of a product. Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.
ISBN: 978-3-6391-5262-3
Издательство:
Книга по требованию
Дата выхода: июль 2011
Frederic P. Miller, Agnes F. Vandome, John McBrewster
High Quality Content by WIKIPEDIA articles! Concentrated solar power (CSP) systems use lenses or mirrors to focus a large area of sunlight onto a small area. Electrical power is produced when the concentrated light is directed onto photovoltaic surfaces or used to heat a transfer fluid for a conventional power plant. Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.
ISBN: 978-6-1336-1405-5
Издательство:
Книга по требованию
Дата выхода: июль 2011