für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book aims to study the impact of water level control structures on the self-assimilative capacity and ecosystem of rivers. Constructing a water level control structure in a river reach will increase the water depths, decrease the velocities and increase the groundwater table. These changes in the river hydraulics will impact the water quality of the river, its thermal regime and the fish that dwell in it. A mathematical model was developed to simulate the hydraulics, water quality, pollution transport in the river, temperature regime and fish habitat. The study and results showed that water level control structures have negative impacts on the upstream self-assimilative capacity of the rivers, but they have a positive impact on the DO concentrations in the downstream side due to the reaeration that happens across them. The structures also have a positive impact on the fish. As for the temperature regime it was slightly affected by the existence of the control structure.The book should be especially helpful to professionals or anyone else interested in the field of hydraulics, water quality and water environment. ····· 1036119351
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Acquiring and tracking signals such as legacy GPS L1 C/A can prove challenging under adverse conditions. Increasing the processing gain by 20 dB usually requires long coherent integrations which remain limited by the 50 Hz data bits transmitted. Fortunately, the GPS has been modernized with the addition of a civil signal, namely L2C, on the L2 frequency band. In this book, acquisition and tracking methods making use of both the L1 C/A and L2C signals in a combined manner are developed and tested. Three best-performing acquisition methods are described theoretically and compared. The first method implies a non-coherent summation of L1 and L2 correlator outputs. The second method implements an independent differential summation of L1/L2 correlator outputs and the third method represents a non-coherent plus dependent differential summation. Regarding tracking sensitivity, L1 C/A and L2C code and phase discriminator outputs are combined through a Kalman filter estimating the relative delay between L1 and L2, the L2 code and phase errors, the L2 frequency error and the L2 phase acceleration error. Results are shown in terms of sensitivity compared to standard single frequency tracking. ····· 1036119250
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Rigorous assessment of uncertainties associated with capacitor installation in distribution systems and those associated with load demands is the aim of the present work. Interval mathematics provides a powerful tool for modeling such uncertainties. The present work developed in this book focuses on three approaches.The first concerns the assessment of uncertainties associated with capacitor allocation and sizing in distribution feeders using interval mathematics. The second approach involves the assessment of uncertainties in load flow using interval arithmetic. The third approach is based on modeling load uncertainties in reactive power compensation of distribution feeders using interval arithmetic.Implementation of the proposed technique is applied to different radial distribution feeders, one of them is a practical Egyptian feeder, and satisfactory results are obtained. ····· 1036119193
für 35.91€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Air pollution is one of the major issues for the pollution across the world. Exposure to high levels of major pollutants such as SO2, NO2, RSPM, PM10 etc. can cause many major health related issues. The Sources of these pollutants can be Natural or Anthropogenic that may include Rapid urbanization, Industrialization etc. Air quality in major cities in India is a paramount point of concern and this concern give rise to the need of assessment. For this Central Pollution Control Board executed a nation-wide programme of ambient air quality monitoring known as National Air Quality Monitoring Programme .The objectives is to determine status and trends of ambient air quality to ascertain whether the prescribed ambient air quality standards are violated to Identify Non-attainment Cities i.e. Air Quality of these cities is categorized into low, moderate, high and critical depending upon the specific pollutant concentration with respect to NAAQS standards to obtain the knowledge and understanding necessary for developing preventive and corrective measures. It is an effective and versatile tool for the assessment of Air Quality. ····· 1036119151
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The detection of blockage location in a deepwater flowline running from a subsea well to the host platform is an integral part of deepwater subsea flow assurance area. As E&P is moving into greater water depths, flow assurance in subsea flowlines is increasingly becoming important. Deep water production fields are facing even new challenges nowadays. The major problem with deep water installations is the deposition of solids like hydrates, waxes, asphaltenes and scale in the flowlines. These depositions grow slowly and reduce the flow rate of oil and gas steadily. Eventually after few days or months the flowline is partially or fully blocked. To design a appropriate mitigation program it is important to know exact location of the blockage in the long flowlines. Correct information on blockage location results in higher net present values, reduction in blockage removal costs and resumption of flow of hydrocarbons in the flowline back to normal in minimal time. This book will help understand the application of various blockage locating methods in oil/gas flowlines. The book will highlight the further research needs in this under researched area of deepwater subsea flow assurance. ····· 1036119093
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The structural identifiability analyses of established and novel glucose-insulin models for the studies of diabetes was performed, to determine whether the models are globally structurally identifiable with the observations available. Structural identifiability analysis is an essential step in the modelling process and a key prerequisite to experimental design and parameter estimation. Analyses presented assuming observations of both glucose and insulin concentrations on two versions of the well-cited Minimal Model, the Original Minimal Model and Extended Minimal Model for the modelling of the responses to an Intravenous Glucose Tolerance Test a Euglycemic Hyperinsulinemic Clamp model and two novel modified versions of the Minimal Model, a Closed-Loop Minimal Model and a Double-Pole in Closed-Loop Minimal Model, when the models describe a complete course of glucose-insulin dynamics during an Intravenous Glucose Tolerance Test. ····· 1036119028
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray When a given 3D city model, consisting of mainly buildings and roads, is viewed at reduced scale, its objects not only become smaller but tend to conflict due to small area available. Generalization plays an important role to overcome these effects and helps in preserving the required legibility. Various operations are performed during generalization on these objects. One of the primary requirements for generalization is structure recognition. It not only involves structure recognition of individual object but various objects in neighborhood as well and includes many spatial relations among them. This book aims at recognizing 3D settlement structures for automatic generalization, an innovative extension to 2D. The recognition procedure has been divided into three levels namely micro, meso and macro and is based upon individual buildings, buildings in neighborhood and buildings at cluster level having similar properties such as settlement blocks as well as psychophysically perceived groups. The structure recognition leads to development of various rules based on spatial as well as non-spatial conflicts among them. These rules are then used for cartographic generalization. ····· 1036118688
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this study, a simulation model is developed to generate synthetic wastewater flow hydrographs resulting from a community with specific socio-economic conditions. The synthetic hydrographs are developed while retaining their commonly observed random behavior. The socioeconomic characteristics of a community are accounted for by the composition of the community and its social categories, the water use pattern of every category during the various daily activities (weekday and weekend), and the water use facilities (fixtures and appliances) available to the community. The model utilizes different water use patterns by every social group for every appliance during the different day types e.g. weekday and weekend. The use patterns account for the stochastic nature of use in terms of number of uses, duration of use and times of use in the day. Randomly generated hydrographs are generated for weekdays and weekends. The daily sewer hydrographs are transformed by hydraulic routing through the sump -pump to daily pumped flow hydrographs conveying wastewater to the treatment plant. ····· 1036118365
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The impurities may be in the form of pathogenic organism, unpleasant taste and smell, excessive colour and dissolved mineral and chemicals. The decapicitating impact of using un-potable water is a great threat to human health. It is a very alarming state that majority of the population in developing countries is still denied access to clean and safe water supply, This results in the spread of diseases like HIV AIDS and Hepatitis, affect the population and render them unfit, partially or totally to live a useful life. Living environment for the individuals as well as the community and surroundings are distressed. ····· 1036118302
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Raw landfill leachate from Kulim landfill site (KLS), Pulau Burung landfill site (PBLS), and Kuala Sepetang landfill site (KSLS) was characterized in laboratory. Effectiveness of a novel powdered activated carbon (PAC) augmented sequencing batch reactor (SBR) technique for landfill leachate treatment was examined. The SBR experiments were categorized into batch and repeated processes. Batch process experiments comprised of preliminary experiments (leachate/activated sludge, PAC dosage, and settling time) which was later optimized using Response Surface Methodology (RSM). In repeated experiments, optimized operational parameters from batch experiments were applied in non-powdered activated carbon-SBR (NPAC-SBR, 5 phases), powdered activated carbon-SBR (PAC-SBR, 5 phases), and double-react settle-SBR (DRS-SBR, 7 phases), for treatment of raw leachate collected from KLS and PBLS. In general, the DRS-SBR that was operated in seven phases (fill, react I, settle I, react II, settle II, draw, and idle) yielded better results than did the conventional five-phase (fill, react, settle, draw, and idle) SBRs. Finally , PAC was improved SBR performance. ····· 1036118273
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Pri goryachey prokatke medi imeet mesto intensivnoe obrazovanie okaliny, chto privodit k bol`shim poteryam metalla. Odnim iz putey ustraneniya etogo nedostatka yavlyaetsya sozdanie poverkhnostnykh sloyev formirovaniem zashchitnykh diffuzionnykh pokrytiy. S etoy tsel`yu na detalyakh metallurgicheskogo oborudovaniya uspeshno primenyaetsya napylenie pokrytiy metodom elektrodugovoy metallizatsii s posleduyushchey termoobrabotkoy. Poluchennyy Cu Al diffuzionnyy sloy imeet tverdost`, zharostoykost` i iznosostoykost` v neskol`ko raz bol`she, chem u medi. V rabote issledovany struktura, khimicheskiy i fazovyy sostav, a takzhe opredelena mikrotverdost` sozdannykh na medi poverkhnostnykh sloev. Sloi byli polucheny naneseniem na mednye obraztsy alyuminievogo pokrytiya metodom elektrodugovoy metallizatsii tolshchinoy 150 300 mkm s posleduyushchey goryachey prokatkoy v diapazone temperatur 880 900 S i obshchim obzhatiem do 91%. Ustanovleno, chto elektrodugovaya metallizatsiya yavlyaetsya effektivnym metodom zashchity medi ot ugara i okalinoobrazovaniya pri nagreve i posleduyushchey goryachey prokatke. Pri etom Cu Al diffuzionnyy sloy v protsesse prokatki deformiruetsya vmeste s osnovoy bez razrusheniya i ostaetsya na gotovom prokate. ····· 103615410
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Over the last years, several studies pointed out arterial stiffness as a major cause of cardiovascular risk. This parameter has been widely investigated and is usually associated with high blood pressure and aging. Measuring pulse wave velocity is considered the standard method to assess the arterial stiffness. Although this hemodynamic parameter is well accepted by the medical/scientific community, the equipments available in the market are very expensive and difficult to operate, even by skilled personnel. Hereby, devices are still hard to find not only in medical offices but also in clinical/hospital unities. This context has been the main motivation to address the problem of finding new methods for the assessment of arterial stiffness and other associated hemodynamic parameters, as is the case of the augmentation index, ankle-arm index and others. This work was centred on the development of a new approach to the use of piezoelectric sensors with related test and signal conditioning circuits, as well as on the development of a software analysis tool. Tests with humans are also included just to demonstrate that results are consistent and reproducible. ····· 103613755
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Recently, malaria has been expanding geographically into new spatial areas mainly due to climate change. However, unplanned land use change has also played a great role in this phenomenon. One of the new geographical areas where malaria has been observed is Kabale district in Uganda. This book therefore, elaborates the role of fish farming in the prevalence of malaria in Kabale. Using primary and secondary data sets which were analysed qualitatively and quantitatively using SPSS and content analysis, the results showed that malaria is a major problem in the study area, its prevalence increased among households whose fish ponds and homestead sites were characterised with crops such as coco yams, cabbages and sugarcanes, Dracaena fragrans live fence, abandoned fish ponds and in some cases those living in close proximity to fish ponds. However, fish farming is not the only factor contributing to malaria prevalence in Kabale but also brick-laying, sand mining and stone quarrying, changing climatic conditions, ignorance, and compromised immunity. Therefore, to effectively tackle malaria, the government should address problems with fish farming and all the above factors outlined. ····· 103613727
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Managed Pressure Drilling, MPD, one of the advanced techniques in the Drilling and Petroleum Industry, currently at the top of the drilling technology evolution pyramid, is a collection of tested drilling techniques and variations. MPD, when properly engineered and executed, in most of the scenarios, can help mitigate several drilling issues, and improve personal and environmental safety. However, not all wells with drilling issues and/or problems need MPD. Proper screening of potential candidates with utmost diligence is required prior to electing to use MPD. Any technology, let alone MPD, new or old, simple or complex, expensive or cheap, should not be applied without thorough understanding and careful evaluation of the entire process. Technology used for wrong reasons, with incomplete comprehension, and half-hearted assessment and analysis, is bound to give wrong, sometimes even catastrophic, results. This work, a research submitted to Texas A&M in 2009, freely downloadable from tamu.edu, is an attempt to provide basic steps in the candidate selection and evaluation while screening for MPD applications. Basic understanding of Drilling and Petroleum Engineering will help. ····· 103613667
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The investigation of productivity improvement method in manufacturing firms consists of two major aspects. The scientific approach is concerned with the development of a methodology for productivity improvement appropriate to the situation of manufacturing firms in Ethiopia. Two models, a productivity factor model and a productivity measurement model have been developed for use with productivity improvement method. Second, it is supported by practice-oriented work in the manufacturing firms, consisting of data acquisition activities in general, and of case studies in selected firms in order to assemble, analyze and evaluate specific data on productivity problems, and to test the results obtained. The productivity improvement method (PIM) is developed by considering both the theoretical and empirical study results. The PIM consists of four phases and nine steps having a number of major tasks. The tools, formats, and templates used in the productivity improvement method (PIM) have been designed so that they can be applied without detailed knowledge of the complex mechanisms of the productivity problems in manufacturing firms. ····· 103613534
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Microstructure evolution during and following hot deformation was modeled using Cellular Automata (CA) technique. Dislocation annihilation during and following hot deformation, dynamic static and meta-dynamic (DRX, SRX and MDRX respectively), are considered using a 2D CA approach. The dislocation density was employed as the governing parameter to simulate the softening fraction. Kocks-Mecking approach was used to derive the dynamic recovery (DRV) curves. The flow curves, softening kinetics and final microstructures were modelled for different thermomechanical conditions (i.e. different Zener-Hollomon parameters, Z) and used as the input data for the post-deformation softening simulation to elucidate the effect of DRX on the post-deformation softening. The simulation results were compared with the experimental data from the hot torsion test of AISI 304 steel. The proposed model used a wide range of Zener-Hollomon parameter (Z) and predicted the final microstructure and softening kinetics curves. Consequently, the CA approach can predict the final microstructure, softening kinetics and flow curve successfully under the wide range of thermomechanical conditions. ····· 103613359
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El objetivo de este trabajo es el desarrollo de un código de cómputo para el análisis termomecánico de elementos combustibles que permita evaluar el desempeño de los elementos combustibles en condiciones normales y transitorias de operación. Este programa considera los diferentes fenómenos que le ocurren a un elemento combustible, cuando es introducido a un reactor de potencia. En particular, esta propuesta se enfoca en combustibles de reactores de agua en ebullición por lo que adicionalmente se debe tomar en cuenta el cambio de fase de líquido a vapor. Como los fenómenos en los materiales del combustible y la camisa son sensibles a los cambios de temperatura y a la razón de fisión o flujo neutrónico, cada punto en el núcleo presentará un comportamiento diferente de los otros. El código a desarrollar está basado en las más recientes correlaciones experimentales, para cada uno de los fenómenos modelados para el comportamiento termomecánico. ····· 103613105
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray La identificación es una rama de la ingeniería de control que permite construir modelos matemáticos de sistemas dinámicos a partir de datos experimentales. La mayoría de procesos en la industria son de naturaleza multivariable, el modelo dinámico de un sistema multivariable es esencial para el diseño de sistemas de control automático basado en modelos, tales como el control predictivo (MPC), control por modelo interno (IMC), control robusto, control adaptativo, etc. Este libro se centra en la identificación de sistemas multivariables, lineales e invariantes en el tiempo, se estudian y evalúan los principales métodos de identificación multivariable y se presenta una metodología para el diseño de experimentos de identificación de sistemas que operan con o sin realimentación, la metodología propuesta se valida con un caso de estudio. Está dirigido a estudiantes y/o ingenieros interesados en iniciarse en el campo de la identificación de sistemas multivariables bajo un enfoque teórico práctico. ····· 103612779
für 32.31€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Utilizando una técnica de inteligencia artificial, se diseñó y entrenó una red neuronal de tipo feedforward multicapa con arquitectura 1:25:15:15:47 para determinar el espectro por fotoneutrones para 15 puntos dentro de una sala de radioterapia operando con un LINAC de 18 MV a partir de solo un valor de equivalente de dosis ambiental H (10) como entrada correspondiente a un punto sobre el exterior de la puerta del cuarto de tratamiento. En los aceleradores lineales para radioterapia que funcionan a energías mayores de 10 MV producen una dosis indeseable por neutrones para el paciente y el personal de la clínica, a pesar de la existencia de tecnología para llevar a cabo la medición dentro de la sala, esta se complica debido a la necesidad, el gran número de detectores, el tiempo y el costo que ello conlleva. Los espectros de neutrones y H (10), fueron calculados para 47 intervalos de clase de energía, en 16 detectores en una sala de tratamiento con un LINAC de 18 MV mediante el código MCNP5. Los espectros obtenidos mediante métodos Monte Carlo coinciden con los reportados en la literatura para este tipo de aceleradores. ····· 103612365
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray La Distribución puede considerarse un sector importante y complejo ya que en él se plantea la relación directa entre la Distribuidora y el Cliente que recibe el servicio. Este mercado es un monopolio natural, entendiendo a partir de ello que se requiere intervención del Estado a fin de lograr el bienestar óptimo social, donde tarifas y calidad de servicio y producto representan los pilares sobre los que debe actuar la regulación. Los modelos de regulación pueden considerarse como de regulación por incentivos, identificándose entre ellos los modelos de Price Cap, Reveneu Cap, Yarstick Competition, como los más importantes, y por otro lado la regulación por Costo de Servicio. Cada uno de estos modelos tiene variantes en términos de la frecuencia de fijaciones tarifarias, mecanismos de reparto de beneficios entre usuarios e inversionistas y algunos factores determinantes en el comportamiento de la eficiencia de las firmas bajo la regulación. Se puede destacar sí, el hecho que mientras más largos sean los períodos de vigencia de tarifas, mayores incentivos se tiene para minimizar sus costos. ····· 103611904
für 58.41€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Hidráulica Aplicada, es un libro texto orientado al área de Ingeniería, en el campo de la conducción de agua a alta y baja presión. Comprende la selección de bombas, las tuberías y los canales, a casos agrícolas sencillos, desde el acuífero de suministro hasta el sitio de servicio. Resume las diferentes teorías y métodos existentes,se proponen soluciones viables y prácticas, como recomendaciones que conduzcan a una decisión adecuada. Un primer capítulo que presenta las diversas bombas existentes en el comercio y su fácil selección de acuerdo a las necesidades del proyecto. Un segundo capítulo, que trata de la conducción de agua por tuberías a alta presión, y los diversos sistemas posibles para lograr una segura,rápida y económica respuesta, incluyendo los métodos de diseño más utilizados en la actualidad. Finalmente un tercer tema, que comprende la conducción de agua a presiones atmosféricas y servidas, canales y alcantarillas, presentando todas las alternativas de diseño que produzcan soluciones a este tipo de problema, acompañado de curvas que facilitan la solución de las ecuaciones. ····· 103611678
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Una de las estrategias de control actualmente muy difundida es la llamada lógica difusa o borrosa, en la que se utilizan expresiones que no son ni totalmente ciertas ni completamente falsas, es decir, es la lógica aplicada a conceptos que pueden tomar un valor cualquiera de veracidad dentro de un conjunto de valores que oscilan entre dos extremos, la verdad absoluta y la falsedad total. Conviene recalcar que lo que es difuso, borroso, impreciso o vago no es la lógica en sí, sino el objeto que se estudia. Esto permite tratar información imprecisa, como estatura media o temperatura baja , en términos de conjuntos borrosos que se combinan en reglas para definir acciones del tipo: si la temperatura es alta entonces enfriar mucho . Mediante un ejemplo práctico el trabajo propone una introducción al control difuso, comparando sus resultados con una estrategia de control clásico. El libro está dirigido a estudiantes de grado y postgrado en ingeniería, interesados en tópicos de control. ····· 103611609
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Este estudio converge a la caracterización geomorfológica y de cobertura vegetal de la cuenca media y baja del Catatumbo ubicada en el Departamento Norte de Santander de Colombia, utilizando software e imágenes satelitales de sensores remotos para observar a través de los años la intervención del hombre en la misma. Es por ello que se plantea la utilización de herramientas tecnológicas como lo son las imágenes Landsat y los software ENVI 4.1 y Arc View 3.2 para hacer la caracterización de la hoya hidrológica, y realizar un balance hídrico buscando finalmente establecer la relación que tienen la variación de los caudales del sistema hídrico con la intervención del hombre en la cuenca. ····· 103611336· 1 · ::::: · 10 ·· 11 ·· 12 ·· 13 ·· 14 ·· 15 ·· 16 · ::::: · 17 ·
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