最新刊期
卷 ， 期 7 ， 1995
- 摘要：The basic conception of the Genetic Algorithm is introduced.Then the transformation of Job-Shop scheduling problem to gene code of genetic algorithm is given.And a few key points of the genetic algorithm for Job-Shop are explained also.In the end,the simulated results are shown.关键词：combinatorial optimization;scheduling problem;genetic algorithm2|354|69更新时间：2025-12-08
- 摘要：A mathematical model of cochlea is transformed into a applicable second-order difference cochlear model with bilinear transformation.Compared with the traditional cohlear model,the frequency response of new model are found to be quite consistent with the experimental data,especially the high frequency slope is much more improved.A new cochlear map and 3dB bandwidth characteristics for cochlear filter banks are obtained and presented,which will make applications of the cochlear model more quantitative and accurate.Due to simplicity of its structure and reality of its characteristics,it will be proved the model can be used effectively in speech processing system.关键词：Cochlear model;bilinear transformation;speech processing4|98|9更新时间：2025-12-08
- 摘要：１９９３年ＥＩ（ＴｈｅＥｎｇｉｎｅｅｒｉｎｇＩｎｄｅｘ）收录的我国科技期刊名称及论文数摘自中国科学技术信息研究所１９９４年１２月出版：国家科委综合计划司委托项目《１９９３年中国科技论文统计与分析》ＰＰ．１１１～１１２ 1993年EI(The Engineering In...2|28|0更新时间：2025-12-08
- 摘要：Electrical Impedance Tomography（EIT）,a new image reconstruction technique,is being developed after X-CT and MRI.Based on mathematical physical model,an algorithm called alternate algorithm of gradient-memory descent direction is proposed in this paper.Compared with popular algorihtms about EIT,it has advantages of high convergent speed,good inner discrimination and independence from initial value.The computer simulation result shows this algorithm converges on the theoretical solution at an exellent precision.The result is also satisfactory even when the measure data involve 5% random error and 5% shift error.关键词：Image reconstruction;Electrical impedance tomography4|68|10更新时间：2025-12-08
- 摘要：Eigen decomposition algorithms based on three kinds of correlation matrix:autocorrelation,covariance,and modified covariance matrix,for high resolution sinusoidal frequency estimation are researched in this paper.A great number of computer simulation results show that this class of algorithms are superior in MSE and the resolution probability.They are promising in high resolution parameter estimation.关键词：high resolution;frequency estimation;eigen decomposition2|198|6更新时间：2025-12-08
- 摘要：A new approach for implementing SMI algorithm with a linear Systolic array is presented.The Systolic array only performs fast Givens rotations and has only one working state.This makes the Systolic array design,implementation and control simpler.关键词：SMI algorithm;Systolic array;adaptive array2|170|5更新时间：2025-12-08
- 摘要：This paper presents three kinds of new Neural Networks,Learning Subspace Methods（LSM） for Pattern Recognition such as Mininum Norm（MN）,Detecting Error Averaged（DEA）,Forward and Backward Smoothing（FBS）.Their total performances in recognition rate and convergence speed approach or surpass ALSM’s by E.Oja.Especially,the FBS-LSM is by now best method in LSMs.They have been widely used in Pattern Recognition,especially,in speech classfication.Finally,these methods are applied to the classification of targets-ships and clutters-chaffs,the results of the computers simulation are given,also.关键词：neural networks;Learning subspace;pattern recognition;Mininum norm;Detecting error averaged;Forward and backward smoothing2|139|5更新时间：2025-12-08
- 摘要：This paper studies the down-link performance of multi-cell cellular CDMA systems with intracell C/I balancing technique to control transmitter power.Two algorithms are presented,and their performance is compared.The performance analys is accounts for the the effects of lognormal shadowing and path loss which is the fourth power of distance between the base and the mobile.The performance of systems is evaluated by cell-averaged outage probability being different from traditional way.关键词：code division multiple access;Spread spectrum communications;Transmitter power controlling;mobile communications2|24|0更新时间：2025-12-08
- 摘要：One of the most important problem that must be solved in ATM networks is the selective cell discarding（SCD）.A two priority selective cell discarding method is suggested and analysed under conditions of discrete time cell arrival.The defect of Possion arrival process of reference￣[11]is remedied.With the introducing of the π operator an iteration algorithm that can accelerate the speed of convergence when calculating the cell loss probability is suggested.The effectiveness of the SCD in ATM networks is proved by numeric results.关键词：ATM networks;Selective cell discarding;BISDN4|23|1更新时间：2025-12-08
- 摘要：In this paper,a new compact testing named state-difference counting is proposed,and the text confidence for the approach is estimated.The characters of confidence criterion are analysed.At the same time the model of test procedure is created by means of finite state automata.The transformation of the states in the automata is described by use of Markov chains,and the relation between test confidence and sequence length is found.Experiments show that the analysis data agree favourably with the simulation results.关键词：State-difference count;confidence;Automat;Markov chain2|28|2更新时间：2025-12-08
- 摘要：Based on[1],this paper proposes"0.5 Partition Principle"and "choosing Middle Rule".This is an improvement to the method in[1].The effectiveness is proved by the simulation results to the inverted pendulum system.关键词：Unsupervised competitive learning（UCL）;self-learning;Middle rules2|48|0更新时间：2025-12-08
- 摘要：Based on simulated annealing,a new algorithm is presented for computing free distances of convolutional codes.Computational results indicate that the algorithm can find accurate free distances or an upper bound which is tighter than any existing upper hounds.关键词：convolutional code;free distance;simulated annealing2|87|6更新时间：2025-12-08
- 摘要：A necessary condition of satisfying SAC（the Strict Avalanche Criterion） has been discussed.For functions whose degrees are not more than 2 and satisfying SAC of order（n-3） or arbitrary order,we have given their boolean polynomial character.关键词：Strict Avalanche Criterion;Boolean functions;Weight2|37|1更新时间：2025-12-08
- 摘要：Learning Vector Quantization algorithm of type I and type 2（LVQ1,LVQ2） are analyzed thoroughly,and the achievements obtained can be concluded as the following aspects;（1） an optimized scheme of selecting learning step size for LVQ1 is proposed;（2）a significant conclusion is obtained that is concerned with LVQ1 algorithm for the linearly-separable pattern classification problem;（3）LVQ2 algorithm is derived rigorously as a gradient descent method to minimize the classification error;（4）another significant conclusion is achieved that any stable equilibrium state does not exist for LVQ2 algorithm dealing with the overlapping classification problem;（5） an effective modified LVQ2 algorithm is developed to overcome the defect of LVQ2 algorithm for overlapping classification.关键词：Learning Vector Quantization algorithms;Learning step size;pattern classification2|276|12更新时间：2025-12-08
- 摘要：This paper proved that the multi-layered feed-forward neural network with linear output nodes can be used as an optimal feature extractor.It is also proved that the output function of a classifier network is a least-meansquare approximation to the Bayes decision function.For a threelayered network with linear output nodes,arbitrary approximation precision can ha obtained if the network has enough hidden nodes.On the basis of these conclusions,a combined netwrok with the functions of both feature extraction and decision is proposed.The result shown that this combined network has better properties than that of a single network.关键词：neural network;feature extraction;Bayes decision;pattern recognition2|173|36更新时间：2025-12-08
- 摘要：With the rise of neural networks again and their applications to image coding,a new approach to image data compression is developed.This paper expounds the neural network models and the learning algorithms with applications to image coding,the corresponding accomplishments and advances.Some unsolved fundamental theoretical problems,such as the principle of image data compression with neural networks,and the classification of the neural networks based image coding methods etc.are discussed.Finally,the prospects for the areas deserving of further research are given.关键词：neural networks;image coding;mapping;optimization;pattern classification2|260|12更新时间：2025-12-08
- 摘要：A novel BP network model and algorithm are proposed.The model uses the adaptive lookup table unit with non-linear property as the synapse of neuron,thereby providing the time-saving iteration,the fast and global optimum convergence for the network learning.关键词：Adaptive lookup table;neural network;Synaps4|52|0更新时间：2025-12-08
- 摘要：The most commonly used algorithm for Adeprive Active Noise Control（AANC）is Filtered-X LMS（FLMS）algorithm. However,this algorithm isn’t suitable for active control of broadband noise.In this paper,an Intermittent RLS （IRLS）algorithm is presented by taking advantage of the time delay of sound propagation from the secondary source to the error sensor,which is characterized by not only fast convergence and substantial broadband noise reduction but also small computational load relative to Filtered-XRLS algorithm.关键词：Active noise control;adaptive filtering;signal processing3|139|11更新时间：2025-12-08
- 摘要：The new methods for voiceband channel evaluation called chirp envelope and chirpcomplex envelope are presented.The sounding and realtime realization model and computer simulation are given.Based on the high quality chirp sounding system via voiceband channel,the chirp sounding is realized from frequency management to voiceband evaluation.关键词：Chirp Sounding;Channel evaluation;Voiceband2|59|1更新时间：2025-12-08
- 摘要：This paper discusses the fault and performance management of VP connections in ATM exchanger,and then presents a more reasonable solution to the implementation of VP-OAM functions.关键词：OAM;ATM;VP;B-ISDN2|32|0更新时间：2025-12-08
- 摘要：This paper proposes a type of morphological transformation for gray-level image analysis and discusses its generalized form.Two specific representations of the transformation are presented using single structuring element.This paper also proves that this transformation is characterized by several important properties :transtation invariance,reconstruction without distortion and generalized idempotence. Finally,we discuss the technique to extract the morphological features of object,and computational results have shown its validity.关键词：Gray-level image morphology;Generalized morphological skeltron2|69|9更新时间：2025-12-08
- 摘要：A 2nd order RC-allpass-network is presented in this paper.which may be used in broadband phase-controlled devices.The formulas calculating all the element parameters in the.network are derived in detail.Because the characteristic of the network is determined by the reletive values of element parameters and the effect on the characteristic is considered when the active elements are load,the network can be made as monoithic ICs with other active devices for demands.关键词：Allpass-network;lumped circuit;RC-network;phase control;Phase frequency characteristic2|76|0更新时间：2025-12-08
- 摘要：A new adaptive image segmentation method is presented in this paper,which is based on the image stochastic hypothesis model in the combination with the system conditional entropy.And the weight of self-organizing feature mapping network can be updated adaptively on the basis of image stochastic characteristics.The problems of interactive parameters and local minimum in conventional methods have been solved. The experimental result shows that the method in this paper possesses robust and efficient for various types of complex images.关键词：image segmentation;Hypothesis model;Conditional entropy;Features mapping2|472|37更新时间：2025-12-08
- 摘要：Since it doesn’t need any searching of spectrum,ESPRIT has less computation than other high resolution algorithms.This paper presents two methods to fasten the ESPRIT algorithms and decrease the cost of computation.关键词：Generalized eigenvalue（GE）;spectrum estimation;Matrix pencil4|594|28更新时间：2025-12-08
- 摘要：In this paper,we prove,with the help of the relationship between the dual distance and the correlation-immune order,that the dual distance of constant weight code is equal to 1 or 2.关键词：constant weight code;Dual distance;Correlation-immune order2|49|1更新时间：2025-12-08
- 摘要：This paper presents a method for determining the error probability of MDPSK communication systems with differential phase detection on Rayleigh fading channel,and the analytic expression of symbol error rate is derived.The effects of Rayleigh fading,time-selective fading and white noise on the performance of MDPSK systems have been considered.When the form of fading spectrum is assumed to be Gaussian or rectangular,the symbol error rate of BDPSK,QDPSK and ODPSK systems has been numerical calculated,respectively.关键词：MDPSK communication systems;rayleigh fading channel;Symbol error rate;Differential phase detection2|111|0更新时间：2025-12-08
- 摘要：The relationship between error detection performance of some nonlinear block codes and asymptotic VG bound is presented in this paper.We have proved the nonlinear block cedes with identical distance distribution are nonproper for error detection,if these codes are not satisfy asymptotic Varshamov-Gilbert bound.关键词：Nonlinear codes;Error detected codes;VG bound2|38|0更新时间：2025-12-08
- 摘要：The probability of undetected error of the（2m,2,m） binary nonlnear constant weight codes is analysed in this paper.We prove that these nonlinear constant weight codes are no good for error-detecting if M≥5,so that the conjecture fiven by the author in 1989 is correct.关键词：Nonlinear code;Constant weightcode;Error-Detecting code4|35|9更新时间：2025-12-08
- 摘要：We prove that linear coset codes could achieve asympotically the capacity of writeeffieient memory,and point out that the covering radius of linear codes plays an important role in the cede construction for write-efficient memory.We also present a construction method of error-correcting codes for write-efficient memory.关键词：Write-efficient memory;capacity;linear code;Covering radius2|29|0更新时间：2025-12-08
- 摘要：双频级联互补码的研究朱晓华，贾鸿志（南京理工大学，南京２１００１４）双频级联互补码可增大发射信号的压缩比，同时又可缓解压缩比和多普勒容限之间的矛盾。本文提出一种在压缩滤波器前消除初相的方法，可较好地解决双频级联互补码的处理问题。一、双频级联互补码假定...2|37|2更新时间：2025-12-08
- 摘要：正交拉丁方的升阶算法及应用朱士信（合肥工业大学应用数学系）ＡｎＡｌｇｏｒｉｔｈｍｏｆＩｎｃｒｅａｓｉｎｇＯｒｄｅｒｏｆｔｈｅＯｒｔｈｏｇｏｎａｌＬａｔｉｎＳｑｕａｒｅｓａｎｄＴｈｅｉｒＡｐｐｌｉｃａｔｉｏｎｓ￥／／一、正在拉丁方的升阶算法正交拉丁方在...2|80|4更新时间：2025-12-08
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