最新刊期
卷 ， 期 5 ， 1990
- 摘要：In this paper, the uniqueness of image matching location using projection feature is proved. The computational method of projection feature using Walsh functions as kernel is presented and the computational process is speeded up. By using linear model established between relative displacement of window image and projection sequence, the fast mapping location is performed. Two combinatory fine location approaches are presented. A large number of experimental results confirmthat the location accuracy of the approaches is approximate to that of SSDA, but the speed is increased more than ten times over that of SSDA.2|61|3更新时间：2025-12-08
- 摘要：In this paper we propose some new methods for restarting the fast prewindow-ed RLS algorithms which can still be effectively applied to joint process estimation problem after restarting. Experimental results verify that these methods are simple and of practical significance.2|39|0更新时间：2025-12-08
- 摘要：A class of subscript sequences with dimension two is given in this paper. Their minimum polynomials, periods and linear complexities are investigated.2|12|1更新时间：2025-12-08
- 摘要：This paper discusses analysis and synthsis of one kind of nonlinear sequences generators DKG which consist of a linear feedback shift register（LFSR）with a primitive connective polynomial, a random select generator and a nonlinear feedforward function. It is shown that the linear complexity of the keystreams generated by DKG can be determined, its realization is easy and security much better than the original nonlinear feedforward genera tors.2|29|4更新时间：2025-12-08
- 摘要：LPC gives biased estimation when analysis is pitch-asynchronous, so that the errors of formant parameter estimation of LPC are large.Homomorphic Linear Prediction Coding （HLPC） gives unbiased estimation in any case.The accuracy of formant estimation for both algorithms under various condition is studied quantitatively in this paper. The results show that, the accuracy of HLPC estimation is better or much better than LPC estimation in any case.2|104|9更新时间：2025-12-08
- 摘要：A general resolution for the optimum element locations o（?） weighted thinning array and the grating lobe level of the optimum array are firstly presented. Special attention is then paid to the array weighted by general raised cosine function. The properties of the optimum thinning array with this weighting are analyzed. The closed-form expressions for the efficiency index, grating lobe level, beamwidth and clean region width are also given. As a result, a simple design method of optimum thinning arrays with any desired nearby （mainlobe） sidelobe level and clean region width is obtained. Finally, an application of the thinned arrays is briefly discussed.2|149|24更新时间：2025-12-08
- 摘要：A formula is developed to calculate 3-D radiation field of antennas on the finite truncated cone- cylinder by applying the UTD and differential geometry. These formulas are also applicable to the finite truncated cone and cylinder. Examples are given on the calculations of 3-D radiation patterns of circumferential slots on the finite truncated cone-cylinder. The results of calculations agree well with the experimental ones.2|40|1更新时间：2025-12-08
- 摘要：Optical fiber loss measurements have always been influenced by noise, resulting in precision degradation and even ambiguity. In this paper, an idea of "Relation Function" is presented which gives quantitative relationship between measurement uncertainty, acceptable minimum signal to noise ratio and number of sampling times at each sampling point."Relation Functions" for typical fiber attenuation measurement methods, splice loss measurement methods, fault location and maximum measurable range determination are derived. Verification experimental results are shown.2|33|1更新时间：2025-12-08
- 摘要：In this paper an example is given to illustrate that dichotomizing can’t construct the shortest parsing tree of expression. An algorithm to construct the shortest parsing tree of expression using commutative and associative laws is given and proved. The algorithm is suitable for programming languages like Fortran. It can raise the quality of object code of the program being unable to be vectorized.2|26|0更新时间：2025-12-08
- 摘要：When only equality generating dependencies （egd’s） appear as constraints D and （database） scheme R is lossless with respect to D, the previously known recognition and boundedness results for ctm schemes cover embedding fd’s are applicable. It is also shown that, for any attributes X from a single relation scheme of the database, the known method of computing X-total projections can be still used for ctm schemes when fd’s plus a single jd are constraints.2|15|0更新时间：2025-12-08
- 摘要：Minority generation mechanisms of deep depleted MOS capacitor are discussed in this paper. The method to evaluate spatial distribution of the effective minority generation lifetime is proposed. The sample of low dose （implanted B） is measured. It is shown that the effective generation lifetime is gradually increased from the interface to the interior and the lifetime is a constant in a region deeper than 0.8μm, where the implanted boron does not penetrate.2|21|0更新时间：2025-12-08
- 摘要：In this paper the change of image area of a static object surface due to camerapanning is studied by meams of the concept of the solid angle, thus the distance from the moving camera to the object surface can be calculated using two images. The advantage of the method is that there need no feature point selection and matching for the two images before and after moving. It is suitable for the case of large perspective deformation when the camera is gradually approaching to the object.2|68|4更新时间：2025-12-08
- 摘要：In this paper the external oscillations of scatterer are analysed by ray theory. The necessary condition of external oscillations is the existence of closed geodesic lines on the surface of scatterers. The existence of closed geodesic lines （oscillate loci） is proved. Although there are infinite closed loci on the surface of scatterer, they yield same result in determining SEM poles.2|25|1更新时间：2025-12-08
- 摘要：中国人民解放军测绘学院张宗雪副教授经多年研究,于1986年5月在微电子科技领域提出了两定律。 稳记电路定律:对信号构成的稳定正反馈或门,称稳记细胞能够稳定记忆信号。高电平二（含多）输入稳记细胞能够稳记高电平信号,不能直接记忆低电平信号,低电平二（含多）输2|21|0更新时间：2025-12-08
- 摘要：The printed windows in rectangular waveguides have been investigated by a combined numerical method of the field and network theories to obtain their multi-mode scattering characteristics. The influences of the nonzero metallization thickness and the mounting grooves are taken into account in the method. As the structures are degenerated into the metal windows, the numerical results agree well with those published.2|23|0更新时间：2025-12-08
- 摘要：An arranging model about the access way of ideal IBM token ring LAN has been built. Moreover, the analysis of the model has been compared with other Token Ring LAN.2|29|2更新时间：2025-12-08
- 摘要：This paper deals with the new form of jump signal Flip-flop in characteristic equation, thus the method of designing synchronous and asynchronous sequential circuits is unified. Furthermore, the state transition graph under the action of multiple jump singnals cp,is investigated and its multiple jump excitation equation, by which the multiple jump sequential circuit is easily realized, is derived.2|49|5更新时间：2025-12-08
- 摘要：The developing of power MOS devices is overviewed, including the trends of the application field. A figure of merit for the various planar junction termination techniques has been proposed. The limitation theory of the relation between the frequency and the power output has also been introduced in order to predict the trend of the evolution of the devices.2|384|1更新时间：2025-12-08
- 摘要：A new method using delay line descriminator for demodulating and monitoring FM noise and degeneration loop for improving it is presented. The theoretical analysis and a set of experimental results which shows about 10 dB phase noise reduction are given. This method is simple, reliabl and potential. It can be used on various occasions.2|31|0更新时间：2025-12-08
- 摘要：In this paper, we propose a novel whitening approach for Gaussian colored noise using the linear predictive hidden Markov model which has been widely applied to speech processing.2|325|4更新时间：2025-12-08
- 摘要：Pd, Si and Al were deposited on n-GaAs with concentration 2×1018cm-3 by electron beam evaporation. Non-alloying and low resistivity （ρc≈5×10-6Ωcm2） ohmic contacts were obtained. After high temperature （410℃）, long term annealing, sample surface was not smooth and the specific contact resistivity increased. The thermal stability will be enhanced if a layer of Ti diffusion barrier is added between Al and Si/Pd. However the diffusion barrier can be brought into action only if the reaction Ti and Al is not allowed to consume all the Ti during heat treatment.2|55|1更新时间：2025-12-08
- 摘要：Based on the proposed fuzzy quantization circuit realized with SCMAIC （Semi-Custom Multiple-valued Array IC）, this paper proposes a fuzzy comparison circuit which is suitable to be used in fuzzy relation equation solving. With the comparison circuit used as the basic array element, the fuzzy relation equation solving circuit is realized. The system needn’ t carry out A/D conversion. Based on SCMAIC, it is very convinient to be integrated into one chip to realize fast fuzzy relation equation solving.2|12|0更新时间：2025-12-08
- 摘要：By means of Blahut theorem,the relationship between the linear complexity of a periodic sequence and the Hamming weight of its DFT transformed serquence is explored. For some sequences a, b, we have characterized the linear complexity of the product sequence ab.3|33|3更新时间：2025-12-08
- 摘要：In this paper, the equipments principles and results n measuring characteristic parameter of MCP by UV photo-electronic method are presented. Prospects in application of this method are also discussed.2|31|1更新时间：2025-12-08
- 摘要：Two types of High Tc Oxide Granular Superconductor Current Injection Three-Terminal Device （HOGSCITTD） have been made and their characteristics have been studied in our experiments. The results show the possibility of forming the switching and amplifying devices with these types of device. The experiments also show the granularity and the weak-links in the high Tc Oxide superconductor.4|11|0更新时间：2025-12-08
- 摘要：A new high Q switched-capacitor （SC） filter using a single amplifier is presented. An optimal design for minimizing capacitor spreads of the circuit is obtained. Compared with the circuits given by literature, the capacitor spreads of the proposed circuit have been significantly reduced.2|47|2更新时间：2025-12-08
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