Summary-In this paper a theory of two-dimensional moment invariants for planar geometric figures is presented. A fundamental theorem is established to relate such moment invariants to the well- known algebraic invariants. Complete systems of moment
Product Descr iption The importance of computer security has increased dramatically during the past few years. Bishop provides a monumental reference for the theory and practice of computer security. This is a textbook intended for use at the advanc
介绍了什么是波束形成；以及波束形成各种基本知识及原理，介绍了阵列理论； Beamforming is a signal processing technique used in arrays for directional signal transmission or reception.This is achieved by combining elements in the array in away where signals at particular angles experienc
Advanced communications cenarios demand the development of new systems where antenna theory, channel propagation and communication models are seen from a common perspective as a way to understand and optimize the system as a whole. In this context,
