Cong Xu – författare

Doctoral Thesis / Dissertation from the year 2005 in the subject Chemistry - Materials Chemistry, Carnegie Mellon University, course: Chemical Engineering, language: English, abstract: Unlock the future of energy with this groundbreaking exploration into Polymer Electrolyte Membrane Fuel Cells (PEMFCs), a comprehensive study poised to revolutionize our understanding and utilization of clean energy technologies. Delve into the intricate world of multi-scale modeling, where cutting-edge simulations bridge the gap between microscopic phenomena and macroscopic system performance in both Direct Methanol Fuel Cells (DMFCs) and Hydrogen PEMFCs (H2 PEMFCs). Discover how meticulous parameter tuning and innovative operational strategies can unlock unprecedented levels of fuel cell efficiency, power density, and overall system profitability. Confront the insidious challenge of CO poisoning in H2 PEMFCs head-on, uncovering novel mitigation strategies that promise to extend fuel cell lifespan and reliability. Ascend to the macro-scale and witness the optimization of complete H2 PEMFC power generation systems, where the strategic integration of heat recovery mechanisms leads to remarkable gains in energy efficiency and economic viability. Journey down to the micro-scale, where molecular simulations illuminate the fundamental transport processes within PEMs, paving the way for the design of next-generation materials with enhanced proton conductivity and water management capabilities. From unraveling the complexities of methanol crossover in DMFCs to optimizing fuel utilization and electrode kinetics, this book offers a holistic perspective on PEMFC technology, empowering researchers, engineers, and energy enthusiasts alike to shape a sustainable energy future. Explore keywords such as multi-scale modeling, optimization, CO poisoning, fuel utilization, heat integration, methanol crossover, proton diffusion, and molecular simulation to navigate the wealth of knowledge contained within, and prepare to witness the dawn of a new era in clean energy innovation, maximizing system efficiency and pushing the boundaries of power density. This pivotal work not only dissects the intricate science behind PEM fuel cells but also provides a practical roadmap for accelerating their widespread adoption, heralding a cleaner, more efficient, and economically viable energy landscape for generations to come through a comprehensive understanding of transport phenomena and system dynamics. A truly transformative read for anyone invested in the future of sustainable energy.

​This book highlights the shortcomings of the present Digital Rights Management (DRM) regulations in China. Using literature reviews and comparative analysis from theoretical and empirical perspectives, it appraises different DRM restriction regulations and practices as well as current advice on balance of interests to analyze the dilemma faced by the DRM system.This research intends to help China establish a comprehensive DRM regulatory model through comparative theoretical and empirical critiques of systems in America and Europe. A newly designed DRM regulatory model should be suitable for specific Chinese features, and should consist of government regulated, self-regulated, and even unregulated sections. The new regulation model might be an addition to existing legal structures, while self-regulations/social enforcement also would be as important as legislation based on case studies.

​This book highlights the shortcomings of the present Digital Rights Management (DRM) regulations in China. Using literature reviews and comparative analysis from theoretical and empirical perspectives, it appraises different DRM restriction regulations and practices as well as current advice on balance of interests to analyze the dilemma faced by the DRM system.This research intends to help China establish a comprehensive DRM regulatory model through comparative theoretical and empirical critiques of systems in America and Europe. A newly designed DRM regulatory model should be suitable for specific Chinese features, and should consist of government regulated, self-regulated, and even unregulated sections. The new regulation model might be an addition to existing legal structures, while self-regulations/social enforcement also would be as important as legislation based on case studies.

​This book highlights the shortcomings of the present Digital Rights Management (DRM) regulations in China. Using literature reviews and comparative analysis from theoretical and empirical perspectives, it appraises different DRM restriction regulations and practices as well as current advice on balance of interests to analyze the dilemma faced by the DRM system.This research intends to help China establish a comprehensive DRM regulatory model through comparative theoretical and empirical critiques of systems in America and Europe. A newly designed DRM regulatory model should be suitable for specific Chinese features, and should consist of government regulated, self-regulated, and even unregulated sections. The new regulation model might be an addition to existing legal structures, while self-regulations/social enforcement also would be as important as legislation based on case studies.