Catalogue Search | MBRL
Are you sure you want to remove the book from the shelf?
{{itemTitle}}
52,139
result(s) for
"field design"
Sort by:
Learning FPGAs : digital design for beginners with Mojo and Lucid HDL
\"Learn how to design digital circuits with FPGAs (field-programmable gate arrays), the devices that reconfigure themselves to become the very hardware circuits you set out to program. With this practical guide, author Justin Rajewski shows you hands-on how to create FPGA projects, whether you're a programmer, engineer, product designer, or maker. You'll quickly go from the basics to designing your own processor. Designing digital circuits used to be a long and costly endeavor that only big companies could pursue. FPGAs make the process much easier, and now they're affordable enough even for hobbyists. If you're familiar with electricity and basic electrical components, this book starts simply and progresses through increasingly complex projects\"--Publisher's description.
Book
A wake field design system utilizing a database analysis to enhance the performance of energy saving devices and propeller
The purpose of this paper is to propose the wake field design system which outputs a bare hull form generating a desired input wake distribution, and to demonstrate capability and effectiveness of this system through a practical hull form design project considering the interference effect of ESD and propeller. Our proposed wake field design system outputs a hull form which achieves desired input wake distribution utilizing hull form and wake field database. In the system, the database is analyzed by a method for the first time proposed in the present study, that is, a scheme using the Euclidean distance and hull form blending (morphing). To validate our system, the one-leave-out cross validation is performed, which is widely used for the validation of the database analysis. There, it is confirmed that the proposed method has practical accuracy. A practical demonstration is also performed in this paper, where a 749 gross tonnage cargo ship is selected as object ship. The initial (original) hull form in this research was developed in a project of the Japan society of naval architects and ocean engineers as a considerably promising bare hull form. This hull form is defined as the original design in this study, then we try to further modify the design to reduce delivered horse power in a condition of hull with duct type ESD. Importantly, we design a new hull form to improve wake field suitable for the duct along with the consideration of reduction of cavitation. To confirm the effectiveness of our proposed system, the towing tank test is conducted to measure the wake distribution, using 2 model ships (original and new design) with 6.8 m ship length. It is proved that our proposed system is capable to efficiently design desired wake field for the given hull form without trial and error, and provide equivalent to or more precise results than the expert designer’ design. Additionally, we also confirm that the propulsive performance of the new design hull form is improved. In our careful comparison of the effectiveness of the ESD, it is indicated that the new design shows 2.2% reduction of horsepower compared to the original hull form both for ESD installed case.
Journal Article
Frank Bowling, Mappa mundi
Featuring numerous works and rarely seen large-scale paintings from Frank Bowling's sweeping 60-year career, this book highlights the artist's magnificent use of sensuous color and rich texture in pictures that are at once absorbing and tactile. When they were first exhibited in the late 1960s, Frank Bowling's immense \"map paintings\" were widely celebrated for their vibrant color and subtle modulation of the painted surface. These works, like many in Bowling's oeuvre, draw on the principle of mapping to create a kind of mental geography, woven throughout with personal and historic imagery. This collection of paintings from throughout Bowling's career features exquisite reproductions that illuminate his experiments with material and the paintings' wide range of pictorial possibilities. Accompanied by an extensive curatorial survey, art historical contributions, prose poem, biographical visual essay, as well as the collected writings and correspondence of the artist, this book offers an in depth exploration of Bowling's career and aspects of his journey from his home in Guyana to London and New York. It also highlights references to the natural world and his use of classical and literary symbolism. This book creates a true mappa mundi--an evolving map of Bowling's inner and physical worlds.
Book
The architecture of the playing field : shaping space in sport
A novel exploration of playing fields as aesthetic and architectural spaces that frame athletes' creativity and spectators' evolving experiences of sport. The playing field is more than an arena for sporting rivalry. It is a laboratory of invention, where athletes and coaches create new uses for the human body in response to the constraints and affordances of space. Indeed, Richard Cleary argues that, from translucent squash courts to the NBA three-point line to the city streets used by skateboarders, all sports have embedded spatial relationships that are also charged with social significance. The Architecture of the Playing Field explores the aesthetic and physical experiences of the grounds on which we compete. Cleary digs into the perspectives of spectators, athletes, coaches, and umpires—perspectives that have changed along with the shifting configuration and mediation of the field, from early live sports coverage to today's TV broadcasts overlaid with high-tech graphics and observed from every angle. Cleary shows how rules governing the size, shape, and divisions of the field reflect sports' entwinement with societies at large, in particular the politics of race and gender. Mindful as well that some sports resist containment, he analyzes the disruptive use of space by snowboarders and parkour athletes. The Architecture of the Playing Field sensitizes us to the interplay of settings and bodies in motion fundamental to the power of sport.
eBook
Review of Flow Field Designs for Polymer Electrolyte Membrane Fuel Cells
The performance of a polymer electrolyte membrane fuel cell (PEMFC) closely depends on internal reactant diffusion and liquid water removal. As one of the key components of PEMFCs, bipolar plates (BPs) provide paths for reactant diffusion and product transport. Therefore, to achieve high fuel cell performance, one key issue is designing BPs with a reasonable flow field. This paper provides a comprehensive review of various modifications of the conventional parallel flow field, interdigitated flow field, and serpentine flow field to improve fuel cells’ overall performance. The main focuses for modifications of conventional flow fields are flow field shape, length, aspect ratio, baffle, trap, auxiliary inlet, and channels, as well as channel numbers. These modifications can partly enhance reactant diffusion and product transport while maintaining an acceptable flow pressure drop. This review also covers the detailed structural description of the newly developed flow fields, including the 3D flow field, metal flow field, and bionic flow field. Moreover, the effects of these flow field designs on the internal physical quantity transport and distribution, as well as the fuel cells’ overall performance, are investigated. This review describes state-of-the-art flow field design, identifies the key research gaps, and provides references and guidance for the design of high-performance flow fields for PEMFCs in the future.
Journal Article
Numerical Investigation and Optimization of Cooling Flow Field Design for Proton Exchange Membrane Fuel Cell
High temperatures and non-uniform temperatures both have a negative bearing on the performance of proton exchange membrane fuel cells. The temperature of proton exchange membrane fuel cells can be lowered by reasonably distributed cooling channels. The flow field distribution of five different cooling plates is designed, and the temperature uniformity, pressure drop and velocity of each cooling flow field are analyzed by computational fluid dynamics technology. The results show that while the pressure drop is high, the flow channel distribution of a multi-spiral flow field and honeycomb structure flow field contribute more to improving the temperature uniformity. As the coolant is blocked by the uniform plate, it is found that although the flow field channel with a uniform plate has poor performance in terms of temperature uniformity, its heat dissipation capacity is still better than that of the traditional serpentine flow field. The multi-spiral flow field has the strongest ability to maintain the temperature stability in the cooling plate when the heat flux increases. The increase in Reynolds number, although increasing the pressure drop, can reduce the maximum temperature and temperature difference of the flow field, ameliorate the temperature uniformity and improve the heat transfer capacity of the cooling plate.
Journal Article
The Generative Generic-Field Design Method Based on Design Cognition and Knowledge Reasoning
Large language model (LLM) and Crowd Intelligent Innovation (CII) are reshaping the field of engineering design and becoming a new design context. Generative generic-field design can solve more general design problems innovatively by integrating multi-domain design knowledge. However, there is a lack of knowledge representation and design process model in line with the design cognition of the new context. It is urgent to develop generative generic-field design methods to improve the feasibility, innovation, and empathy of design results. This study proposes a method based on design cognition and knowledge reasoning. Firstly, through the problem formulation, a generative universal domain design framework and knowledge base are constructed. Secondly, the knowledge-based discrete physical structure set generation method and system architecture generation method are proposed. Finally, the application tool Intelligent Design Assistant (IDA) is developed, verified, and discussed through an engineering design case. According to the design results and discussion, the design scheme is feasible and reflects empathy for the fuzzy original design requirements. Therefore, the method proposed in this paper is an effective technical scheme of generative generic-field engineering design in line with the design cognition in the new context.
Journal Article
Obstructed flow field designs for improved performance in vanadium redox flow batteries
AbstractIn this study, we have investigated the effects of varying flow channel depths and addition of various channel obstructions on the electrochemical performance and pumping power requirements of vanadium redox flow batteries (VRFBs). Specifically, 3D-printed ramps and prismatic obstructions were inserted into the channels of interdigitated flow field (IDFF) and parallel flow field (PFF) designs to observe the effect of non-uniform channel depth on the mass transport properties of open- and closed-ended flow channels. Results were compared with conventional flow field geometries. Integration of ramps into the closed-ended (i.e., IDFF) flow channels resulted in 15% improvement in peak power density (PPD) at a flow rate of 50 mL min−1. Addition of ramps to IDFF has also resulted in a significant 40% drop in required pumping pressure due to guided and gradual delivery of the electrolyte to the electrode plane. In addition, the effects of varying channel depths in open-ended (i.e., PFF) channels were found to be much more drastic with improvements in PPD up to 150%. Overall, findings of this study highlight the significance of varying channel depths on improving the mass transport characteristics of VRFBs and offer an alternative approach for design of high-performance flow cells.Graphical Abstract
Journal Article
From Generic to Adaptive: Similarity-Adaptive Receptive-Field Cross DETR for Remote-Sensing Object Detection
Object detection in optical remote sensing imagery faces persistent challenges from severe instance overlap, extreme spatial density, and motion or atmospheric blur. These degradations cause conventional detectors to over-mix neighboring instance features and fail to separate closely packed objects. To address these limitations, we propose SARC-DETR, a detection framework that augments the RT-DETR architecture with two complementary plug-in modules: Similarity Adaptive Convolution (SAC) and Receptive Field Cross Convolution (RCC). SAC introduces a reproducing-kernel-Hilbert-space (RKHS) motivated similarity gate that selectively suppresses responses inconsistent with local feature prototypes, thereby reducing cross-instance interference in overlapped and blurred regions. RCC constructs a large directional receptive field through orthogonal strip-based aggregation and content-adaptive fusion, enabling efficient long-range context capture without quadratic complexity overhead. Both modules can be integrated into existing DETR-style detectors without modifying the detection head or training protocol. On VisDrone2019-DET, SARC-DETR improves APval from 29.7 to 34.8, AP50val from 49.5 to 56.2, and APSval from 19.2 to 24.8. On DIOR, AP rises from 57.9 to 68.4, and on NWPU VHR-10, from 44.4 to 66.5, demonstrating robust cross-dataset generalization. After structural reparameterization, the additional overhead is less than 0.75 M parameters and 0.36 G FLOPs, confirming deployment suitability for UAV and satellite-based remote sensing applications.
Journal Article
Optimization Design of High-Performance Hybrid Superconducting ECR Ion Source Magnet System Based on Particle Swarm Algorithm
The development of 18 GHz hybrid superconducting ECR ion sources is constrained by the complex trade-off in magnet system design, where achieving simultaneous excellence in field strength, confinement stability, and resonant coupling remains a formidable challenge. A design automation framework that tightly integrates Particle Swarm Optimization (PSO) with COMSOL-based finite element analysis is presented. This synergy enables the global optimization of the permanent magnet hexapole and the superconducting solenoids’ currents as an interconnected system. The optimizer delivers a magnetic field configuration that simultaneously achieves a 2.6 T axial peak, a 4.25 mirror ratio, and a precise minimum-B field of 0.6 T. This synergy creates a stable magnetic cage perfectly resonant at 18 GHz, ensuring superior plasma confinement and efficient microwave-to-plasma energy transfer. This study validates the PSO algorithm as a powerful tool for transcending conventional design paradigms in complex electromagnetic systems. The resulting magnet solution not only meets the stringent demands of next-generation ECR ion sources but also provides a transferable blueprint for optimizing a broad class of symmetric devices governed by multi-physics constraints.
Journal Article