Ebooks de matemáticas, página 3 de 153

Las Matemáticas pueden ser divertidas. Los autores han desarrollado esta idea, introduciendo una variedaad de temas interesantes a la vez que oportunos, sin destacar de modo especial las llamadas aplicaciones practicas. Este enfoque dara al lector medio una imagen mas clara del significado y belleza de las Matematicas, que la que le daria la tradicional forma de abordarlas de manera mas abstracta.

"Proposta de Planejamento Cirúrgico de Fontan Baseado em Estudos Numéricos e Hemodinâmicos Tridimensionais" é uma obra que mergulha no avançado campo da cirurgia cardíaca, explorando a técnica de Fon

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Este libro trata en forma muy exhaustiva los errores geométricos y la interpretación y forma de acotación de las tolerancias geométricas incluidas en la norma ASME Y 14.5-2018. También compara la nueva version de la norma ASME Y14.5-2018 con la ISO 1101:2017. En esta obra se desarrolla la medicion de los errores geometricos. Para ello se procede a explicar la seleccion de los instrumentos, equipos, dispositivos a utilizar y los metodos de control aplicados a piezas producto, como asi tambien la interpretacion de la informacion surgida de los planos de los productos a fabricar y controlar. Traduce las principales definiciones y temas de la norma ASME Y14.5-2018 al español y ayuda a interpretar los conceptos.Incluye tambien la forma de redactar certificados de calibracion y medicion siguiendo los lineamientos de la norma ISO 17025 y la manera de desarrollar procedimientos especificos de calibracion y medicion.Este volumen contiene preguntas y ejercicios utiles para el estudiante ,el docente, el profesional y el lector en general.

En este libro se encontrarán una serie de funciones que se han construido o que vienen incorporadas en el programa DERIVE para la solución de gran cantidad de problemas. La selección de los ejercicios obedece a un cuidadoso proceso de filtracion, poniendolos a prueba en cursos que con este fin hemos dictado. Se tratan temas de areas tan disimiles como: la aritmetica, el algebra, el calculo diferencial e integral, el calculo vectorial, los metodos numericos, las ecuaciones diferenciales ordinarias de primero y segundo orden, el algebra lineal y la teoria de matrices, las matematicas especiales, la teoria de congruencias, algunos topicos de teoria de numeros, la teoria de conteo, la estadistica descriptiva, la graficacion de funciones cartesianas, parametricas y polares tanto en el plano como en el espacio, la graficacion segmentaria y las proyecciones isometricas de superficies.Hemos hecho especial hincapie en la necesidad de ir guiando paso a paso al lector para que pueda, en la mayoria de las veces, resolver sus problemas matematicos sin la presencia y orientacion del Tutor, lo cual le permite tener un efectivo soporte practico para la realizacion del anhelado laboratorio de matematicas con el ordenador.

The broaching process remains an essential machining process when manufacturing fir tree slots in turbine disks for aircraft engines. The cost- and time-intensive experiment-based approach restricts the application of alternative cutting tool materials when broaching nickel-based alloys. Given the accuracy and computation time, the developed model-based multiscale approach presents great advantages in prediction of the broaching process and thus can accelerate the development process.

Aus okonomischen, okologischen und legislativen Grunden ist es notwendig Schmierstoffe zu substituieren. Insbesondere in der Kaltmassivumformung ist dies aufgrund von hohen Belastungen schwer umsetzbar. Der Ansatz dieser Dissertation ist es mithilfe einer vom Institut fur Oberflachentechnik entwickelten Werkzeugbeschichtung und einer Texturierung der Halbzeuge eine Trockenumformung zu ermoglichen. Die Ergebnisse haben eine Machbarkeit gezeigt, jedoch ist adhasiver Verschlei ein Problem.

Poly--glutamic acid (-PGA) is a biopolymer with various industrial applications. Despite its diverse applications, -PGA of defined molecular structure is costly. Sustainable synthesis of designer--PGA was achieved with a B. subtilis 168 derivative as host. In-depth investigations of the metabolism provided new targets for enhanced -PGA synthesis. The developed strains and cultivation conditions demonstrate the huge potential of microbial -PGA for the use in industrial applications.

Hydraulic Excavators are subjected to tip-over situations with potential hazardous outcome. The given work analyses the state of the art of tip-over protection methods, including the current mandatory overload protection system. Using methods derived from the area of robotics, an algorithm for use as an assistance system was developed to predict and actively prevent dangerous tip-over situations. The developed method was evaluated in multi-body simulation models and in physical field tests.

The present thesis provides a model to monetarily aggregate procurement risks to support decision makers. A material flow oriented view forms the fundament of the model. The model is designed to aggregate delay, quality and cost related procurement risks considering their uncertainty. Procurement risks are aggregated to form a monetary risk distribution. Decision-makers can select procurement strategies that are adequate for their risk situation, depending on their affinity for risk to mitigate procurement risks.

Systematic measurement errors in piezoelectric cutting force measurements are researched within this thesis. The errors originate from the seismic mass, which is mounted upon the transducer. On the one hand, the seismic mass reduces the bandwidth of the measurement system. On the other hand, the seismic mass leads to superimposed inertial forces, when the seismic mass is subjected to motion during cutting force measurement. Both effects are modelled and correction methods were researched, which are capable to correct these systematic measurement errors in hard real-time.

Given the fact of the increasing meaning of individual and functional micro- or nanostructures, it is of high interest to open up two-photon polymerization (TPP) as a structuring technology for production. TPP offers real 3D capability while providing a high precision, so arbitrary geometries with optical, photonic or biological func-tionalities can be realized. Thus, the aim is to use TPP as a mastering technology for metal substrates that serve as tools for injection moulding.

In job shop production the change towards synchronized job shop production, which is based on the concept of so-called taktlines, has been shown to enhance efficiency. In this dissertation an algorithm for the taktline layout is developed, following a multi-objective approach. The algorithm consists of two sequential discrete optimizations problems, namely a modified Substring Cover Problem and a partitioning Cluster Analysis, including a Multiple Sequence Alignment. For an overall validation, real-world data from tool manufacturers are subject to the proposed algorithm.

In the design of turbomachinery components, a significant effort is carried out regarding the optimization of efficiency. The increase in thermal efficiency particularly involves the introduction of high-performance alloys. Such alloys are for example titanium alloys. Sink electrical discharge machining (sink EDM) is a crucial manufacturing process for components due to its independence of machined material strengths; however, new materials require process design. Hence, research to understand and optimize the machining of titanium alloys is of great benefit to the industry in general.A positive tool polarity is generally adopted in sink EDM to maximize material removal relative to tool wear. Sink EDM of / titanium alloys as Ti6Al4V is however atypical in that these materials necessitate a negative tool polarity. Adding to the intrigue are gamma titanium aluminides (-TiAl), which machine better under the conventional positive polarity. Established explanatory models of sink EDM fail in resolving the removal behavior a need for fundamental research is given. This thesis focuses on clarifying the phenomena behind this interesting behavior by investigating removal mechanisms over a range of relevant process conditions. The polarity-effect is demonstrated to arise from the polarity-dependent nature and extent of titanium carbide (TiC) formation on the workpiece surface, which significantly affects material removal mechanisms. An explanatory model, deduced from different experimental and numerical approaches, clarifies the influence of polarity to the formation mechanism of a TiC layer. With regard to monitoring of adverse layer formations, the measurement of acoustic emission (AE) is proven an appropriate concept. A correlation of the AE signal to process forces is even established, which may be crucial to determine the deflection of thin electrodes in EDM. Finally, the knowledge acquired is applied and enhanced in comprehensive process design, that also involves the machining of additively manufactured -TiAl. The study reveals the beneficial behavior of the fine microstructure relative to the resulting surface integrity. As a result, this thesis delivers a model-based concept for process design with respect to the adequate choice of tool polarity during machining of titanium alloys.

A temperature and strain rates dependent fracture model is developed based on Weibull statistics to quantitatively describe the brittle-ductile transition of glass fracture in precision glass molding process. Under the assistance of FEM simulation, this fracture model can be used to calculate the fracture probability of glass during the precision glass molding process. Meanwhile, the most probable fracture timing, location of fracture initiation and fracture pattern can be also predicted.