Zhijun Wu – författare

In the digital world, the need to protect communications increases every day. While traditional digital encryption methods are useful, there are many other options for hiding your information. Information Hiding in Speech Signals for Secure Communication provides a number of methods to hide secret speech information using a variety of digital speech coding standards. Professor Zhijun Wu has conducted years of research in the field of speech information hiding, and brings his state-of-the-art techniques to readers of this book, including a mathematical model for information hiding, the core concepts of secure speech communication, the ABS-based information hiding algorithm, and much more.

This book shows how to implement a secure speech communication system, including applications to various network security states. Readers will find information hiding algorithms and techniques (embedding and extracting) that are capable of withstanding the advanced forms of attack. The book presents concepts and applications for all of the most widely used speech coding standards, including G.711, G.721, G.728, G.729 and GSM, along with corresponding hiding and extraction algorithms. Readers will also learn how to use a speech covert communication system over an IP network as well as a speech secure communication system applied in PSTN.

Presents information hiding theory and the mathematical model used for information hiding in speech. Provides a number of methods to hide secret speech information using the most common digital speech coding standards. A combination of practice and theory enables programmers and system designers not only to implement tried and true encryption procedures, but also to consider probable future developments in their designs.

Addresses the Challenges of Modern-Day Air TrafficAir traffic control (ATC) directs aircraft in the sky and on the ground to safety, while the Aeronautical Telecommunications Network (ATN) comprises all systems and phases that assist in aircraft departure and landing. The Aeronautical Telecommunications Network: Advances, Challenges, and Modeling focuses on the development of ATN and examines the role of the various systems that link aircraft with the ground. The book places special emphasis on ATC—introducing the modern ATC system from the perspective of the user and the developer—and provides a thorough understanding of the operating mechanism of the ATC system. It discusses the evolution of ATC, explaining its structure and how it works; includes design examples; and describes all subsystems of the ATC system. In addition, the book covers relevant tools, techniques, protocols, and architectures in ATN, including MIPv6, air traffic control (ATC), security of air traffic management (ATM), very-high-frequency (VHF) digital link (VDL), aeronautical radio and satellite communications, electromagnetic interference to aeronautical telecommunications, quality of service (QoS)-satisfied ATN routing mechanism speed dynamic environments, and service-oriented architecture (SOA)-based ATN transmission control algorithm. It also incorporates published research and technical reports to illustrate existing problems, highlight current methods and opportunities, and consider future directions and trends.The authors: Provide an overview of ATNIllustrate the composition of the ATC systemExplain how to design an ATC systemReveal how to use an ATC system to control in-flight airplanesPresent the results of author research on spatial mitigationIntroduce the electromagnetic interference effects and response measures of aviation communications equipmentAnalyze the protective measures of aircraft and ground stations against electromagnetic interferenceThe Aeronautical Telecommunications Network: Advances, Challenges, and Modeling highlights the advances, challenges, and modeling of ATN, and implements strategies for integrating existing and future data communications networks into a single internetwork serving the aeronautical industry. This book can aid readers in working to ensure the effective management of air traffic and airspace, and the safety of air transport.

Addresses the Challenges of Modern-Day Air TrafficAir traffic control (ATC) directs aircraft in the sky and on the ground to safety, while the Aeronautical Telecommunications Network (ATN) comprises all systems and phases that assist in aircraft departure and landing. The Aeronautical Telecommunications Network: Advances, Challenges, and Modeling focuses on the development of ATN and examines the role of the various systems that link aircraft with the ground. The book places special emphasis on ATC—introducing the modern ATC system from the perspective of the user and the developer—and provides a thorough understanding of the operating mechanism of the ATC system. It discusses the evolution of ATC, explaining its structure and how it works; includes design examples; and describes all subsystems of the ATC system. In addition, the book covers relevant tools, techniques, protocols, and architectures in ATN, including MIPv6, air traffic control (ATC), security of air traffic management (ATM), very-high-frequency (VHF) digital link (VDL), aeronautical radio and satellite communications, electromagnetic interference to aeronautical telecommunications, quality of service (QoS)-satisfied ATN routing mechanism speed dynamic environments, and service-oriented architecture (SOA)-based ATN transmission control algorithm. It also incorporates published research and technical reports to illustrate existing problems, highlight current methods and opportunities, and consider future directions and trends.The authors: Provide an overview of ATNIllustrate the composition of the ATC systemExplain how to design an ATC systemReveal how to use an ATC system to control in-flight airplanesPresent the results of author research on spatial mitigationIntroduce the electromagnetic interference effects and response measures of aviation communications equipmentAnalyze the protective measures of aircraft and ground stations against electromagnetic interferenceThe Aeronautical Telecommunications Network: Advances, Challenges, and Modeling highlights the advances, challenges, and modeling of ATN, and implements strategies for integrating existing and future data communications networks into a single internetwork serving the aeronautical industry. This book can aid readers in working to ensure the effective management of air traffic and airspace, and the safety of air transport.

Drawing on years of practical on-site experience, this book presents a new method for controlling "bridge-head bumping" in soft soil ground. Based on deformation compatibility and control theory of structure, it proposes strategies for improving the design method of soft soil ground and the effective "bridge-head bumping" control method. Soft soil ground is chiefly characterized by a large void ratio, high compressibility, high water content, low impermeability, low strength, strong structure and high sensitivity. As a result, it has pronounced rheological properties, and controlling "bridge-head bumping" in soft soil ground is essential to control the amount of soil rheology-induced unstable successive settlement. The book offers extensive information on this and related topics, making it a valuable guide for engineers in Civil Engineering and Geotechnical Engineering alike.