Abstract:How to ensure the safety of digital image/video information is the difficulty and hotspot in the domain of information processing technology nowadays. In this paper,the discrete wavelet transform coefficient matrix is adjusted and scrambling transformed b

Abstract:An adaptive MLSE receiver based on per-survivor processing (PSP) for digital transmissions over high frequency (HF) channels is proposed in this paper. In the proposed receiver,initial channel impulse response (CIR) is estimated with a training sequence a

Abstract:A timing recovery method for IF sampled PCM/FM digital receiver is presented in this paper. It applies the near optimum timing recovery algorithm as well as polynomial interpolators to extract and correct timing error.Computer simulation results reflect t

Abstract:During the radiometric calibration of the low frequency UWB SAR system,the scattering model of the calibrators should be regarded as the low frequency resonance scattering.The regular numerical algorithm is MOM, whose general impedance matrix has a large

Abstract:Through the study of deinterleaving algorithms of AOA and PRI of radar pulse,based on radar threat library,a new quick speed recognition and deinterleaving algorithm for stagger PRI mode and jitter sequence using variable difference histogram is proposed

Abstract:The eigenspace-based (ESB)adaptive beamforming algorithm has good performance,but it is computa- tionally expensive because of eigen-decomposition.An eigenspace-based adaptive beamforming algorithm based on neural network is proposed.The algorithm reduces

Abstract:The inductance of the rectangular plan spiral coil is calculated.The calculated results are in accordance with the results calculated by approximate formula.It is found that the magnetic fields produced by the rectangular plan spiral coil can focus in a v

Abstract:The theory of self-adaptive Huffman coding algorithm is introduced. Aiming at two kinds of latent overflow problem happening when large scale data is compressed in shortly future,software and hardware solution are put forward.Experiment results validate t

Abstract:Electromagnetic simulation software,such as XFDTD,based on Finite Difference Time Domain (FDTD) method,provides only S-parameters at the feed ports.Usually,it is hard to achieve S-parameters of a transmission line system directly from the software.In this

Abstract:A technique of full field deformation measuring,i.e.Digital Speckle Correlation (DSC) is introduced in this paper.DSC is utilized to investigate the mechanical failure behaviors of plastic bonded explosive (PBX) with preset crack subjected to compressive

Abstract:The general model of dynamic test data generation is discussed in this paper.Simulated annealing genetic algorithm(SAGA) is utilized in this model as the main searching method for solving the problem of trapping in local optimum. In this algorithm,the imp

Abstract:The access to database is an important issue during the development of three-tier application system.In this paper,a database connection model based on three-tier architecture is brought out to realize the transparency of access to database and the securi

Abstract:Real-time processing of experiment data is difficult in measuring the divergence of Gaussian beam.The software developed in this paper mainly contains curve fitting of measuring data,Gaussian distribution estimation of curves,calculation of the size of fa

Abstract:The communication between host and signal processing module in radar system is introduced.Then the development of WDM in windows 2000 is analyzed and a multi-board universal signal processing platform is constituted to fulfill the different tasks of signa

Abstract:Now the network security service is provided by the security gateway.The most widely used protocol is Internet Key Exchange protocol (IKE).The initial IKE standards work well for peers with fixed IP address.But with the development of the network,especial

Abstract:A validating test is carried out to validate the control system of a certain aerocraft.The establishment of test stress is the key to gaining evaluation data.In this paper,the design method of stress condition in validating test is discussed,and the envi

Abstract:During the design of pulse transformer used in IGBT solid switch,there are problems of output-consistence and insulation to be resolved.The output-consistence can be carried out through selection of magnetic cores with excellent high frequency performance

Abstract:The techniques for moving target detection and clutter suppression in pulse Doppler radar are discussed based on the analysis of radar clutter characteristics.Illustrations for calculation of the relevant performance indexes are also given.Engineering pra

Abstract:In order to describe network attack better in attack description language and design a more perfect language,several typical description languages are studied and design features of each language are analyzed.After comparison and contrast of an example of

Abstract:In order to improve the efficiency of Java parallel programming,it is an effective method to make use of the existing programming interface.In this paper,JOMP,an OpenMP-like interface for shared memory parallel programming in Java is introduced,including