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Author: Gbotemi Abraham Adediran Publisher: Universal-Publishers ISBN: 1612334350 Category : Languages : en Pages : 112
Book Description
The efficiency of a probabilistic hydrological forecasting system with weather radar and the Probability distributed hydrological model (PDM) was evaluated at the Brue catchment; south-western England. The ability of the radar to measure gauged precipitation in 2007 (regarded as the ground truth) was evaluated using Normalized Bias (NB) and Normalized Error (NE) statistics as the objective function of evaluation. The radar overestimated precipitation measurements by average gauges with NB value of 0.41 and a considerably low NE of 0.68. Furthermore, the effectiveness of a Deterministic nowcasting system (DNS) to forecast radar measured precipitation at 132 forecast time series of 6hrs forecast lead time was assessed. The DNS overestimated the radar measured precipitation with a NB value of 87% and recorded an accumulated NE of 146%. Moreover, the efficiencies of 10 ensemble precipitation forecats generated from a Stochastic nowcasting system (SNS) over the singular deterministic forecasts from the DNS was evaluated at 3 major hydrological events. Some of the ensembles significantly performed better than the deterministic forecast and brilliantly captured the radar measured precipitation at most of the forecast time series. Furthermore, the efficiencies of these sources of precipitation measurement to simulate flows with the PDM at the Brue catchment were also assessed by integrating the radar-based forecasts with measurements from average gauges. The PDM performed satisfactorily well in simulating the flows of 17th January 2007 with an average Nash–Sutcliffe Efficiency Index (NSE) of 0.65 and the model was judged insensitive to the significantly high precipitation inputs for the hydrological event of 27th of May 2007. However, the PDM performed poorly in simulating flows for the historical storms of 20th of July 2007; with the model under estimating flows with bias value of over 250 cumecs for an event popular for its devastating flooding in the Southwest of England. The model inadequacies was however associated to poor radar precipitation measurements and forecasts on which flow simulation was based. This work therefore emphasis the need for developments in hydrological modeling as well as advancement in weather radar technology to effectively correct radar errors due to radar calibration, signal attenuation, clutter and anomalous propagation, vertical variation of reflectivity, range effects, Z-R relationships, variations of drop size distributions, vertical air motions, beam overshooting the shallow precipitation and sampling issues, that has been identified to affect radar measurements.
Author: Gbotemi Abraham Adediran Publisher: Universal-Publishers ISBN: 1612334350 Category : Languages : en Pages : 112
Book Description
The efficiency of a probabilistic hydrological forecasting system with weather radar and the Probability distributed hydrological model (PDM) was evaluated at the Brue catchment; south-western England. The ability of the radar to measure gauged precipitation in 2007 (regarded as the ground truth) was evaluated using Normalized Bias (NB) and Normalized Error (NE) statistics as the objective function of evaluation. The radar overestimated precipitation measurements by average gauges with NB value of 0.41 and a considerably low NE of 0.68. Furthermore, the effectiveness of a Deterministic nowcasting system (DNS) to forecast radar measured precipitation at 132 forecast time series of 6hrs forecast lead time was assessed. The DNS overestimated the radar measured precipitation with a NB value of 87% and recorded an accumulated NE of 146%. Moreover, the efficiencies of 10 ensemble precipitation forecats generated from a Stochastic nowcasting system (SNS) over the singular deterministic forecasts from the DNS was evaluated at 3 major hydrological events. Some of the ensembles significantly performed better than the deterministic forecast and brilliantly captured the radar measured precipitation at most of the forecast time series. Furthermore, the efficiencies of these sources of precipitation measurement to simulate flows with the PDM at the Brue catchment were also assessed by integrating the radar-based forecasts with measurements from average gauges. The PDM performed satisfactorily well in simulating the flows of 17th January 2007 with an average Nash–Sutcliffe Efficiency Index (NSE) of 0.65 and the model was judged insensitive to the significantly high precipitation inputs for the hydrological event of 27th of May 2007. However, the PDM performed poorly in simulating flows for the historical storms of 20th of July 2007; with the model under estimating flows with bias value of over 250 cumecs for an event popular for its devastating flooding in the Southwest of England. The model inadequacies was however associated to poor radar precipitation measurements and forecasts on which flow simulation was based. This work therefore emphasis the need for developments in hydrological modeling as well as advancement in weather radar technology to effectively correct radar errors due to radar calibration, signal attenuation, clutter and anomalous propagation, vertical variation of reflectivity, range effects, Z-R relationships, variations of drop size distributions, vertical air motions, beam overshooting the shallow precipitation and sampling issues, that has been identified to affect radar measurements.
Author: Leda Ciraolo Publisher: BRILL ISBN: 9004497366 Category : Body, Mind & Spirit Languages : en Pages : 164
Book Description
This collection of essays focuses on divination across the Ancient World from early Mesopotamia to late antiquity. The authors deal with the forms, theory and poetics of this important and still poorly understood ancient phenomenon.
Author: Ross A. Telfer Publisher: Routledge ISBN: 0429872135 Category : Social Science Languages : en Pages : 459
Book Description
First published in 1993. In both general aviation and airline transport there is evidence of an emergent awareness of the importance of instruction in training. The demands of technological change, growing need for pilots at a time when the pool of experienced applicants is diminishing, and growing recognition of the importance of Human Factors to aviation safety, are straining the ability to cope. There is a growing recognition by management, of the contribution of ground and airborne instruction to the efficient operation of aviation in a variety of contexts. This book shows how professionals in the aviation industry and academic researchers complement each other in their pursuit of more effective and efficient flight training and instruction. Theory and practice each have a contribution to make. The contributions are thus drawn from regulatory authorities, airlines, universities, colleges, flying schools, the armed services and private practice. Such a mix brings differences in approach, style and argument showing both the variety and common aims in the emerging profession of flight instruction.
Author: Christian Attiogbé Publisher: Springer Nature ISBN: 3030784282 Category : Computers Languages : en Pages : 329
Book Description
This book constitutes the refereed proceedings of the 10th International Conference on Model and Data Engineering, MEDI 2021, held in Tallinn, Estonia, in June 2021. The 16 full papers and 8 short papers presented in this book were carefully reviewed and selected from 47 submissions. Additionally, the volume includes 3 abstracts of invited talks. The papers cover broad research areas on both theoretical, systems and practical aspects. Some papers include mining complex databases, concurrent systems, machine learning, swarm optimization, query processing, semantic web, graph databases, formal methods, model-driven engineering, blockchain, cyber physical systems, IoT applications, and smart systems. Due to the Corona pandemic the conference was held virtually.
Author: Jessica Jones-Smith Publisher: Johns Hopkins University Press ISBN: 142143850X Category : Medical Languages : en Pages : 433
Book Description
Mbuya, Kimberly Morland, Lynnette M. Neufeld, Vanessa Oddo, Cynthia Ogden, Colin Rehm, Scott Richardson, Sarah Ross-Viles, Marie Ruel, Julie Ruel-Bergeron, Garrison Spencer, Marie Spiker, Andrew Thorne-Lyman, Alison Tumilowicz, Kelsey Vercammen, Marissa Zwald
Author: Aaron J. Kleist Publisher: University of Toronto Press ISBN: 0802091636 Category : History Languages : en Pages : 441
Book Description
The question of whether or not our decisions and efforts make a difference in an uncertain and uncontrollable world had enormous significance for writers in Anglo-Saxon England. Striving with Grace looks at seven authors who wrote either in Latin or Old English, and the ways in which they sought to resolve this fundamental question. For Anglo-Saxon England, as for so much of the medieval West, the problem of individual will was complicated by a widespread theistic tradition that influenced writers, thinkers, and their hypotheses. Aaron J Kleist examines the many factors that produced strikingly different, though often complementary, explanations of free will in early England. Having first established the perspectives of Augustine, he considers two Church Fathers who rivalled Augustine's impact on early England, Gregory the Great and the Venerable Bede, and reconstructs their influence on later English writers. He goes on to examine Alfred the Great's Old English Boethius and Lantfred of Winchester's Carmen de libero arbitrio, and the debt that both texts owe to Boethius' classic De consolatione Philosophiae. Finally, Kleist discusses Wulfstan the Homilist and Ælfric of Eynsham, two seminal writers of late Anglo-Saxon England. Striving with Grace shows that all of these authors, despite striking differences in their sources and logic, underscore humanity's need for grace even as they labour to affirm the legitimacy of human effort.
Author: J. Tinsley Oden Publisher: CRC Press ISBN: 1498761151 Category : Mathematics Languages : en Pages : 601
Book Description
Applied Functional Analysis, Third Edition provides a solid mathematical foundation for the subject. It motivates students to study functional analysis by providing many contemporary applications and examples drawn from mechanics and science. This well-received textbook starts with a thorough introduction to modern mathematics before continuing with detailed coverage of linear algebra, Lebesque measure and integration theory, plus topology with metric spaces. The final two chapters provides readers with an in-depth look at the theory of Banach and Hilbert spaces before concluding with a brief introduction to Spectral Theory. The Third Edition is more accessible and promotes interest and motivation among students to prepare them for studying the mathematical aspects of numerical analysis and the mathematical theory of finite elements.
Author: Mike Spens Publisher: SDC Publications ISBN: 158503620X Category : Computers Languages : en Pages : 411
Book Description
Automating SolidWorks 2011 Using Macros is designed as a tutorial to help beginner to intermediate programmers develop macros for SolidWorks and SolidWorks Workgroup PDM. The focus of this book is primarily on the Visual Studio Tools for Applications (VSTA) macro interface. It covers many of the major API functions through practical use cases. It teaches many Visual Basic.NET fundamentals as well as SolidWorks, SolidWorks Workgroup PDM and Excel API functions. The Author has also added a chapter dedicated to some of his favorite source code for you to use as the basis for typical automation procedures. Using this book you will learn how to: Record macros Control Custom Properties Create parts and features Build assemblies Batch create drawings Extract information from Workgroup PDM Create many other time saving utilities
Author: Gbotemi Abraham Adediran
Author: Gbotemi Abraham Adediran
Author: Leda Ciraolo
Author: 
Author: Ross A. Telfer
Author: Christian Attiogbé
Author: Jessica Jones-Smith
Author: Aaron J. Kleist
Author: J. Tinsley Oden
Author: Mike Spens
Author: California (State).