Yixian yang (4 risultati)

Condizione: New.

Taschenbuch. Condizione: Neu. Neuware - China's Science and Technology: 100 Great Milestones is an inspiring journey through the most remarkable scientific and technological achievements China has made over the past decade. From the world's largest radio telescope (FAST) and the discovery of new pulsars, to breakthroughs in quantum computing, dark matter detection, deep-sea exploration, and the development of the Hualong One nuclear reactor-this book presents complex frontier science in clear, engaging language accessible to young readers and curious minds of all ages. Each chapter explores the defining moments, scientific processes, and human stories behind these achievements, from the 'China Sky Eye' to the Mars rover Zhurong and the BeiDou navigation system. Featuring vivid illustrations and concise explanations, this volume inspires pride, curiosity, and a passion for discovery. An essential read for aspiring scientists and anyone fascinated by China's rise as a global innovation leader.…

Hardcover. Condizione: New. Language:English.Author:Yixian Yang.Binding:HardCover.

paperback. Condizione: New. Ship out in 2 business day, And Fast shipping, Free Tracking number will be provided after the shipment.Paperback. Language: English. Pub. Date: 2010. This is the first book on higher-dimensional hadamard matrices and their application in telecommunictions and information security. It is divided into three parts according to the dimensional walsh and Hadamard matrices. Fast algorithms. updated constructions. existence results. and their generalised forms are presented. The second part deals with the lower-dimenstional cases. eg3-. 4 -. and 6 - dimensional Walsh and Hadamard matrices and transforms.One of the aims of this part is to simplify moving smoothly from 2-dimensional cases to the general higher-dimensional cases.This part concentrates on the 3-dimensional Hadamard and Walsh matrices.Constructions based upon direct multiplication. and upon recursive methods. perfect binary arrays are also introduced.Another important topic is the existence and construction of 3-dimensional Hadamard matrices of orders 4k and 4k +2 respectively. and a group of transforms based on 2 -. 3 - .4-and 6-dimensional walsh-Hadamard matrices and their corresponding fast algorithms. The third part is the key part. which investigates the N-dimensional Hadamard matrices of order 2. which have been proved equivalent to the well known H-Boolean functions and the perfect binary arrays of order 2.This equivalence motivates a group of perfect results about the enumeration of higher-dimensional Hadamard matrices of order 2. Applications of these matrices to feed forward networking. stream cipher. Bent functions and error correction cods are presented in turn.after introducing the definitions of the regular. proper. improper. and generalised higher-dimensional Hadamard matrices. many theorems about the existence and constructions are presented.Perfect binary arrays. generalised perfect arrays. and the orthogonal desgns are also used to construct new higher-dimensional Hadamard matrices.The many open problems in the study of the theory of higher-dimensional Hadamard matrices which are also listed in the book will encourage further research. Audience This volume will appeal to researchers and graduate students whose work involves signal processing. coding. information security and applied discrete mathematics. Contents: Preface Part I Two- Dimensional Cases Chapter 1 Walsh Matrices 1.1 Walsh Functions and Matrices 1.1.1 Definitions 1.1.2 Ordering 1.2 Orthogonality and Completeness 1.2.1 Orthogonality 1.2.2 Completeness 1.3 Walsh Transforms and Fast Algorithms 1.3.1 Walsh Ordered Walsh-Hadamard Transforms 1.3.2 Hadamard Ordered Walsh-Hadamard Transforms Bibliography Chapter 2 Hadamard Matrices 2.1 Definitions 2.1.1 Hadamard Matrices 2.1.2 Hadamard Designs 2.1.3 Williamson Matrices 2.2 Construction 2.2.1 General Constructions .2.2.2 Amicable Hadamard Matrices 2.2.3 Skew Hadamard Matrices 2.2.4 Symmetric Hadamard Matrices 2.3 Existence 2.3.1 Orthogonal Designs and Hadamard Matrices 2.3.2 Existence Results Bibliography Part II Lower-Dimensional Cases Chapter 3 Three-Dimensional Hadamard Matrices 3.1 Definitions and Constructions 3.1.1 Definitions 3.1.2 Constructions Based on Direct Multiplications 3.1. 3 Constructions Based on 2-Dimensional Hadamard Matrices 3.2 Three-Dimensional Hadamard Matrices of Order 4k + 2 3.3 Three-Dimensional Hadamard Matrices of Order 4k 3.3.1 Recursive Constructions of Perfect Binary Arrays 3.3.2 Quasi-Perfect Binary Arrays 3.3.3 3 -Dimensional Hadamard Matrices Based on PBA (2m. 2m) and PBA (3.2m. 3.2m) 3.4 Three-Dimensional Walsh Matrices 3.4.1 Generalized 2-Dimensional Walsh Matrices 3.4.2 3-Dimensional Walsh Matrices 3.4.3 3-Dimensional Pan-Walsh Matrices 3.4.4 Analytic Representations Bibliography Chapter 4 Multi-Dimensional Walsh-Hadamard Transforms 4.1 Conventional 2-Dimensional Walsh-Hadamard Transforms 4.1.1 2-Dimensional Walsh-Hadamard Transforms 4.1.2 Definitions of 4-Dimensional Hadamard Matrices 4.2 Algebraical Theory of H.…