最新刊期
卷 ， 期 10 ， 1997
- 摘要：The key of MBE algorithm is the continuous property of synthesis speech. This papaer presentsa new algorthm based on MBE. It propses using narrow-band random signal to produce unvoiced speech and anincreasing-decreasing factor to control voiced and unvoiced speech synthesis so that voiced and unvoiced speechsynthesis can be implemented on time field. This new algorithm improves the continuous properties of pitches andamplitudes of synthesis speech. The informal listening at 4. 8Kbps shows that the synthesis speech of our new al gorithm is better than that of traditional MBE.关键词：MBE;Speech synthesis;Increasing-decreasing factor;Narrow-band random signal2|110|7更新时间：2025-12-08
- 摘要：Intelligent speech production system is different from ordinary speech production systems. Weconsidered not only how to convert text into speech but also how to generate the necessary text in text-to-speechconversion .The system gets the right text by the step of topic selection, text planning, text organization, grammarrealization and text generation. According to the generated text, the system at last generates Chinese speechwhich has good quality in naturalness and intelligibility using text-to-speech conversion technology.关键词：Text planning;Text organization;Grammar;Text-to-speech conversion2|114|7更新时间：2025-12-08
- 摘要：This paper describes the general principles of arbitrary digital signal generator, upon which apractical system is presented and the design criteria and trade - offs are discussed. The system can find applications to training,experiments and researches in the fields of baseband digital transmission, industrial conrtol andmetering.关键词：Signal generator;coding;Programmable control2|350|18更新时间：2025-12-08
- 摘要：Random multiple access is a key technology to resolve the shortage of the communicationchannel capacity. Based on a channel model with the capture effect in a packet wireless network, this paper analyzes the throughput of three kinds of tree algorithms and concludes that under the capture effect,their throughput is improved. Finally, inspired by the capture effect a method to optimize the tree algorithms is presented.关键词：Random multiple access;Capture effect;Tree algorithms2|64|5更新时间：2025-12-08
- 摘要：中国电子学会开放实验室将在全国发展专业研究室为了更好地组织和团结社会各方面的力量，开展科学实验活动，对科研成果进行二次开发，扒动科研成果向生产力转化，促进企业的科技进步，中国电子学会开放实验室将在自愿互利的原则下，在大专院校、科研院所、电子企事业单位...0|18|0更新时间：2025-12-08
- 摘要：The analysis of the burst-level cell loss rate of buresty traffic in ATM networks has not beensolved completely so far. None of the present algorithms is not only precise and effective, but also convenient andpracticable. So a novel approach to analyze the burst level cell loss rate based on a general ON-OFF scarce modeis presented in this paper for bursty traffic. It is simple with an analytical expression and the simulation showsthat it is very accurate for applications.关键词：asynchronous transfer mode;Bursty somees;Cell loss2|32|0更新时间：2025-12-08
- 摘要：This paper analyses the advantage and short - coming of routing algorithm which has beenused on the basis of features of area communication network, introduces the dynamic routing technology based ontraffic and describes its structure and process of realization in detail.关键词：Traffic;routing;network management2|43|1更新时间：2025-12-08
- 摘要：This paper. based on wavelet composition, presents a brief representation of the fractal propertyof images and proposes an indicator called Fractal Brownian Quantity which tells how images satisfy DFBR field.Our experiments show that this representation and indicator are significant. We then give the novel application inmultiresolution object recognition.关键词：fractal;Fractal Brownian random field;DFBR field;wavelet;Multiresolution;object recognition2|100|15更新时间：2025-12-08
- 摘要：The 3-D wavelet transform based image coding methods have raised many people’s attentionthese years. But the transform method used in practice is not a real 3-D transform. In this paper, we put forwarda real 3-D wavelet transform based on the 3-D wavelet theory,and then we use such a scheme into video imagecoding. The simulation results prove its efficiency.关键词：Video image coding;3-D wavelet transform;Multi-resolution analysis2|97|15更新时间：2025-12-08
- 摘要：The neural networks which can not only realize n-dimensional logic functions, but also be withthe sub-most and the most robust ability for input data are designed, based on the fact that the sub-most and/orthe most robust ability can only be obtained by classification hyperplanes which are in the middle point of theconnective hoe of any adjacent vertexes of different logic values in n-dimensional hypercube and/or venical withthe line.ffe design rules for connective weights and bias values between robust neurons are presented, withwhich it is proved that the sub-most and most robust network is in the n-k-1 and n-n-k-1 scale （where k≤2n-1）,and the connective weights between the robust neurons can only be 0, 1, -1, which result in the eastestrealization of the net. Finally, computer simulation results are presented.关键词：Binary neural network;Robust neuron;n-dimensional hypercube;n-dimensional logic function2|55|23更新时间：2025-12-08
- 摘要：In this paper, information entropy is introduced as penalty function and imposed to the backpropagation cost function. After training, more organized hidden unit activation patterns are obtained and few hidden units respond for each input sample. The scale of the neural network is reduced ther using the pruningmethod proposed in this paper,and its generalization performance and computational efficiency are improved atthe same time.关键词：information entropy;neural network;Pruning;Generalization performance;ECG classification2|99|7更新时间：2025-12-08
- 摘要：In this paper, it is proposed that the Gabor expansion coefficients of a period（or finite）discretesignal in both the critical sampling case and the oversampling case can be computed by TH neural networks.Theoretical analysis and simulations show that this network will certainly provide approximate solutions arbitrarilyclose to the accurate one within the time of the order of time constants of this network without any programmingcomplexity.关键词：neural networks;least square method;Gabor expansion2|27|3更新时间：2025-12-08
- 摘要：In this paper, the concept of the families of Bent complementary functions（FBCF） is presented. The properties and construction methods of FBCF are studied.关键词：Bent functions;The families of Bent complementary functions2|38|16更新时间：2025-12-08
- 摘要：A class of one-dimensional piecewise linear（PWL）chaotic system is proposed in this paper.This system is capable of generating chaotic signals with uniform distribution and δ-like auto-correlation fonction. It is shown that these signals can be ed to provide binary chaotic ciphers via non-invertible transformations. Moreover,the finite precision effect of the proposed PWL chaotic systems is investigated, and m-sequencebased peturbation approach is proposed. Comparing with traditional stream encryption methods, chaotic stream ciphers are not only abundant in number,but also easy to design and control.关键词：Invariant distribution;linear complexity;Nonlinear complexity;m-sequence;Finite precisioneffect2|317|135更新时间：2025-12-08
- 摘要：The differential characteristics of the substiution-permutation networks are discussed, and theSPNs satifying 1 order diffusion criteria,which can resist to differential cryptanalysis, are constructed.关键词：Differenntial cryptanlysis;Substitution-permution networks;block cipher2|60|4更新时间：2025-12-08
- 摘要：Run-length-limited codes（RLL） also referred to as （d, k） codes, are used for modulation indigital magnetic recording. Up to now, the theory and design of these codes have been well developed. But, mostinformation theory models for these codes are noiseless. In this paper, a noisy discrete channel model, which isbased upon the Heegard medel, is considered. Further more, lower bounds and supper bounds on the capacity ofsuch a channel are derived.关键词：Digital magnetic recording;Run-length-limited codes;channel capacity2|101|8更新时间：2025-12-08
- 摘要：In this paper,the background of TCM technique proposed is first summarized and four impertant events about TCM in its developing way are reviewed. Up-to-date developments and research directions, especially the applications in land digital mobile channel with multipath fast fading interference of TCM on ErrorControl in recent communication system are given. In the same time, the hot technical problem in the researchthe criteria proposed in fading channel on non-Euclid’s metric space is discussed and analyzed. At last, some emergent problems on TCM to be solved are pointed out.关键词：Trellis-Coded Modulation（TCM）;Fading channel;Euclid’s metric space2|247|9更新时间：2025-12-08
- 摘要：A novel hopping Sequences generator based on the Logistic map is presented. The asymptoticstatistical properties of these sequences are analyzed using the ergodic theory of chaos. These sequencies areharder to intercept and give a more uniform spread over any number of frequencies. The Hamming correlationfunction is approximately Poisson-distributed. The results show that chaotic hopping sequences are good candidates for FH/SSMA communications.关键词：chaos;Logistic map;Hopping sequence;Hamming correlation function2|350|105更新时间：2025-12-08
- 摘要：This paper provides a spectrum-coding method suitable fot narrow-band radio communicationto transmit digital signal, which means to code the spectrum with the binary digital signal to be transmitted,thenconvert the spectrum to ordinary analog signal by IFFT and transmit it. At the receiving end,the received analogsignal is sampled and transformed to original coded spectrum by FFT, so that the digital signal of the transmissionend is distinguished.关键词：频谱编码;FFT变换．IFFT变换2|52|3更新时间：2025-12-08
- 摘要：中国计算机学会即将举办国际计算机会议由中国计算机学会、香港电脑学会主办，由中国科学院计算技术研究所、北京大学、清华大学和北京工业大学承办的’９７香港—北京国际计算机会议(ＨｏｎｇＫｏｎｇ－ＢｅｉｊｉｎｇＩｎｔｅｒｎａｔｉｏｎａｌＣｏｍｐｕｔｅｒＣｏｎ...2|14|0更新时间：2025-12-08
- 摘要：A solution for performance analysis of ATM switches is presented by employing m. Validityand exactitude are illustrated by analyzing the performances （cell loss ratio and delay）of switches with variousbuffering types（input buffer, output buffer and shared buffer ATM switches） under Bemoulli arrival, Poisson arrival and Poisson batch arrival.关键词：Approach to performance analysis;FFT;Buffering types;ATM switch2|32|0更新时间：2025-12-08
- 摘要：The hypergraph design method Of multibus structrue of reliable communication networks is investigated in this paper. With processor number and reliability given, a graph of minimum cost and best connection is constructed,which has minimum coritivity.The graph is taken as a representative graph of a type of hypergraphs, and the dual hypergraph of the hypergraph of minimum orders and ports can be obtained. Finally, themultibus structure corresponding to the dual hypergraph can be constructed.关键词：communication networks;hypergraph;Multibus structure.2|57|7更新时间：2025-12-08
- 摘要：Explicit formulas for the element values of a low-pass impedance transforming network havingButterworth or Chebyshev responses are given. For the second- and the fourth-order networks, element values andtransforming frequency band are directly determined by the impedance ratios. Circulating formulaes for the higherorder networks are obtained by the conjugate poles of the reflection coefficient, thereby reducing the design ofthese networks to simple arithmetic.关键词：Impedance matching;Impedance transformation;bow-pass filter;Network synthesis.2|267|8更新时间：2025-12-08
- 摘要：The interest in Fractal Block Boding （FBC）has been steadily growing for its high compressionpotential. Fractal Block Coding in Residue Domain （FBCRD）is a modification of basic FBC which leads to feweriterations and less decoding bine at the decoder while maintaining almost the same coding efficiency and imagequality. This paper further presents a fast decoding structure for FBCRD. Experiments show that the total decoding bine is lugly reduced in comparison with basic FBC and FBCRD without fast decoding structure. This improvement provides us with an effective algorithm for real applications of fractal image compression.关键词：fractal;image coding;Fractal block coding;decoding algorithm2|21|2更新时间：2025-12-08
- 摘要：This paper presents a neural netework parallel learning algorithm based on Kalman filtermethod. The results of remote sensing image classifying show that the algorithm has fast convergence properties.关键词：neural networks;Parallel algorithm;Remote sensing2|242|6更新时间：2025-12-08
- 摘要：Based on the research of state space reconstruction at poor SNR and the analysis of reconstruction window using the method of reconstruction signal strength （RSS）, state space reconstruction with improved SNR is derived. From this,the largest Lyapunov exponents of Lorenz and Rossler attractor are estimatedeffectively at poor SNR by use of a improved algorthm of the largest Lyapunov exponent. This method may become an effective approach to distinguish the chaotic signals overwhelmed in the noise.关键词：reconstruction;chaos;Lyapunov exponent;SNR3|334|26更新时间：2025-12-08
- 摘要：Algorthm based fault tolerane or algorithmic fault tolerance is an efficient scheme to improvethe reliability of parallel architectures used for real-time digital signal processing environments and other computation-intensive tasks. In this paper, a novel generalized weighted checksum encoding scheme with high error-correcting capability is taken into consideration, furthermore. a fast error detecting/error correting algorithm is proposed. Finally,the application employing the new encoding scheme in fault-tolerant matrix arithmetic is introduced.关键词：Algorithm based fault tolerance;Error corrcting;Generalized weighted checksum encodingscheme;Euclidean algorithm2|45|0更新时间：2025-12-08
- 摘要：By using the structure of a subclass of quasi-cyclic coded to search with computer, and by applying some usual code transformation, we obtain seven new linear codes, which improve the lower bounds on theminimum distance for a binary linear cede. Three of them are optimal.关键词：linear codes;Quasi-cyclic cedes;Optimal linear cedes;Minimum distance;Weight distribution.2|80|2更新时间：2025-12-08
- 摘要：In recent yare,many researchers have paid attention to repeated-root cyclic codes. In this paper,we analyze the properties of period distribution and generalized period distribution for repeated-root cycliccodes, and establish the general calculation method and formula. Furthermore, the period distribution and generalized period distribution are determined for some known repeated-root cyclic codes.关键词：repeated-root cyclic codes;Period distribution;Generalized period distribution;ExtendedReed-Solomon codes;Hamming codes.2|63|6更新时间：2025-12-08
- 摘要：A fuzzy function estimator based evolutional algorithm-adaptive fuzzy evolutionary algorithm isproposed. The function estimator adaptively estimates the fitness function of chromosome in the process of evolution,which reduces the computation of evolutionary algorithm. Finally, experiment results on designing fuzzy controller by evolutionary algorithm are presented.关键词：Fuzzy function estimator;Adaptive estimating;fitness function;evolutionary algorithm;fuzzy controller2|88|4更新时间：2025-12-08
- 摘要：On the basis of total least mean squares error criterion, the paper proposes the total least meansquares （TLMS） algorithm. We give its statistical analysis, studie its global asymptotical convergence and evaluate its performances via computer simulations.关键词：LMS algorithm;TLMS algorithm;Hebb learn rule;Unsupervised leading;statistical analysis;Stability2|141|3更新时间：2025-12-08
- 摘要：In this paper,the phase space is constructed by various features extracted from seismic signalsin time domain. The results of calculation for four sets of samples indicate that there are two"attractors" in thephase space: one is the attractor for underground nuclear explosion, another is for natural earthquake. The yieldedcorrelation dimension are all the fortal dimensions, and less than the dimension of phase space. When the dimensions of phase space increased ho low to high,the dimensions of the attractors become apparently saturated,and different attractors have different fractal dimensions. A new concept, namely, the "attraction center" isproposed in this paper. Moreover, the attractor, the attractor dimension, and the attraction center with their applications to seismic pattern recognition of undegrund nuclear explosion are also explored.关键词：Attractor;fractal;pattern recognition2|92|16更新时间：2025-12-08
- 摘要：用判决反馈均衡器实现判决导引代价函数的盲均衡算法ＴｈｅＢｌｉｎｄＥｑｕａｌｉｚａｔｉｏｎｏｆＤｅｃｉｓｉｏｎ－ＤｉｒｅｃｔｅｄＣｏｓｔＦｕｎｃｔｉｏｎｂｙＤｅｃｉｓｉｏｎＦｅｅｄｂａｃｋＥｑｕａｌｉｚｅｒ￥ＹａｎｇＣｏｎｇｈｕｉ(ＳｈｏｕＧａｎｇＩｎ...2|122|17更新时间：2025-12-08
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