Yongkang Liu's Books

Laser Shock Processing of FCC Metals

Mechanical Properties and Micro-structural Strengthening Mechanism

By: Yongkang Zhang,Jinzhong Lu,Kaiyu Luo

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Laser Shock Processing of FCC Metals

Mechanical Properties and Micro-structural Strengthening Mechanism

By: Yongkang Zhang,Jinzhong Lu,Kaiyu Luo

Laser shock processing (LSP) is a new and promising surface treatment technique for improving the fatigue durability, corrosion, wear resistance and other mechanical properties of metals and alloys. During LSP, the generated shock wave can introduce a deep compressive residual stress into the material, due to its high-pressure (GPa-TPa), ultra-fast (several tens nanoseconds), ultra-high strain-rate and high-energy. The overall properties and behavior of metal materials subjected to LSP were significantly improved because a refined surface layer was successfully obtained. Nevertheless, up to now, a clear scenery between micro-structure and macro-property of the refined surface layer, especially formation of sub-micrometer grains from coarse grains during severe plastic deformation, is still pending. Therefore, the basic studies of the underlying mechanism for grain refinement by ultra-high strain-rate presented in this book becomes more and more crucial.

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Page Count

200

Publisher

Springer Science & Business Media

Published Date

ISBN 10

3642356745

ISBN 13

9783642356742

Multi-physics Coupling Analysis of Clayey Core Wall of High Earth-Rockfill Dam

By: Yongkang Wu

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Multi-physics Coupling Analysis of Clayey Core Wall of High Earth-Rockfill Dam

By: Yongkang Wu

Nominated by Tsinghua University as an outstanding Ph.D. thesis, this book investigates the mechanical properties of unsaturated compacted clayey soil, the multi-field coupling consolidation theory of unsaturated soil and its application to a 261.5 m high earth-rockfill dam. It proposes a multi-field coupling analysis method of consolidation, and develops an efficient and practical finite element (FE) program for large-scale complex earth-rockfill dams. The book is primarily intended for researchers studying the multi-field coupling analysis of seepage consolidation.

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Page Count

148

Publisher

Springer

Published Date

ISBN 10

9811310327

ISBN 13

9789811310324

Cognitive Resource Management for Heterogeneous Cellular Networks

By: Yongkang Liu,Xuemin (Sherman) Shen

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Cognitive Resource Management for Heterogeneous Cellular Networks

By: Yongkang Liu,Xuemin (Sherman) Shen

This Springer Brief focuses on cognitive resource management in heterogeneous cellular networks (Het Net) with small cell deployment for the LTE-Advanced system. It introduces the Het Net features, presents practical approaches using cognitive radio technology in accommodating small cell data relay and optimizing resource allocation and examines the effectiveness of resource management among small cells given limited coordination bandwidth and wireless channel uncertainty. The authors introduce different network characteristics of small cell, investigate the mesh of small cell access points in parallel with macrocells in network control and resource management and address resource management in the backhaul with coordination constraints and wireless channel uncertainty. The final section of this brief summarizes and provides future research directions for this topic, including a proposed framework that has been evaluated through realistic simulations. Cognitive Resource Management for Heterogeneous Cellular Networks is designed for researchers and professionals working in wireless communications and networks. Advanced-level students studying electrical and computer engineering should also find the content helpful.

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