Hydrodynamics of Wave-Vegetation Interactions

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Free-surface flow (or wave) interaction with vegetation is a complex subject. In order to understand the underlying physical processes either physical experiments or numerical simulations, or ideally in complement, can be employed. Both approaches face lots of challenges. For example in experiments, the research question is how to scale-down appropriately the large-scale physics and how to interpret the experimental data. In numerical simulations, how to approximate numerically the complex wave-multiple rigid or flexible structures (vegetal stems) including the resolution of turbulence at all spatial and temporal scales. This book reviews the state of the art of the research in the area of wave-vegetation interaction for coastal applications using numerical and experimental approaches. The reference text will be useful to students, early-career researchers, teachers and practicing engineers in the field of ocean engineering, civil engineering and climate change. Sample Chapter(s) Preface Chapter 1: Introduction to Wave-Vegetation Interaction Contents: Preface Introduction to Wave-Vegetation Interaction (Thorsten Stoesser) Vegetation Traits (Maike Paul) Effect of Coastal Vegetation in Attenuating Extreme Waves — A Review (S Harish, V Sriram, B Jochems and Holger Schüttrumpf) Experimental and Numerical Modelling of Flow-Vegetation Interaction in the Framework of Nature-Based Solutions (NBS) for Coastal Defense (Maria Maza) Installation of a Hybrid Tsunami Defense System as a Combination of Engineered Structures and Coastal Forest and Vegetation Management (Norio Tanaka, Yoshiya Igarashi, and Hiroyuki Torita) The Role of Vegetation Flexibility in Wave Attenuation (T J van Veelen, D E Reeve and H Karunarathna) Incorporating Vegetation in Phase-Resolving Models — Macroscopic Approach (R Divya and V Sriram) Turbulence Structure due to Wave-Vegetation Interaction (Zhihua Xie and Thorsten Stoesser) A Comprehensive Review on Wave–Vegetation Interaction (N Hari Ram and V Sundar) Index

Microwave and Millimeter-Wave Antenna Design for 5g Smartphone Applications

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簡介 《5G智慧型手機應用之微波與毫米波天線設計》是一本深入且實用的書籍，全面介紹了5G天線設計的考量。兩位傑出的研究人員提供了一種全面的、跨學科的天線設計方法論。本書涵蓋了從次6GHz微波到毫米波頻譜的各種方法，解釋了微波和毫米波5G天線如何獨立和協同工作。 本書涵蓋了在空間受限的移動設備中設計毫米波5G天線的關鍵考慮因素，以及成本、製造產量和散熱等實際問題。讀者還將找到對5G天線演進可能的未來方向的探索，以及以下內容： - 對5G FR1頻段移動天線設計的基本概念進行全面介紹，包括天線放置、元件設計和拓撲討論。 - 對天線供電機制和阻抗匹配進行全面探討，包括底盤考慮和影響。 - 對頻率可調的毫米波5G天線封裝進行實際討論。 - 對緊湊型毫米波5G天線解決方案和毫米波天線顯示技術在5G移動設備中的應用進行詳細介紹。 這本書非常適合天線、微波、通信和射頻工程師閱讀，同時也對研究生、政策制定者、監管機構和對通信和天線感興趣的研究人員有所裨益。