最新刊期
卷 ， 期 1 ， 1988
- 摘要：A new approach for estimating two-dimensional （2-D） sinusoidal parameters is presented. The algorithm is based on the singular value decomposition （SVD） of the signal matrix that is formed by the signal eigenvectors of autocorrelation matrix. The 2-D frequencies of sinusoids can be separately estimated in each dimension. In a large number of empirically based examples, this method has been found typically to provide excellent performances with the distinct advantage of low computational requirement and low signal to noise ratio threshold.2|72|8更新时间：2025-12-08
- 摘要：Recovering scenes depth is important to image analysis. Stereo vision provides a convenient and direct way to obtain 3-D depth of scenes. The key problem in stereo vision is stereo image matching. A feature-based sequential stereo image matching method is discussed. Unlike previous methods the method use five stereo images sequences. A relaxation algorithm is used to get unique match.2|39|8更新时间：2025-12-08
- 摘要：This paper has analysed several important zero subsets of the extended FT of finite length signal. With Hadamard factorization theorem,several theorem are developed to expose the relationship between these zero subsets and FT spectral magnitude or phase. The results for reconstruction of discrete finite length signal from FT spectral magnitude or phase are further extended for that of continuous signal, and both are expressed in a unified form by the zero set of the extended FT. In addition, a new result for reconstruction of mixture phase signal from FT spectral magnitude is obtained.2|46|0更新时间：2025-12-08
- 摘要：A single point target has been dealt with for earlier radars. As the target high-resolution is required for today’ radars, the target can be regarded as a set of sequentia points rather than single point in some applications. In this paper the linear FM sig- nal digital matched filter for nonsingle point target is investigated and its results of rectangular window weighting are compared with that of Hamming window weighting. It shows, due to the effect of point-spread function that the output of the matched-filter could not express the target reflected coefficients correctly. A post-processing algorithm to correct this effect and its simulation results are given.2|35|1更新时间：2025-12-08
- 摘要：The methods to estimate the degradation transfer-function from the given degraded image itself under some assumptions is described.2|38|0更新时间：2025-12-08
- 摘要：Four kinds of topologies of RC active second-order filter with single capacitor and eight types of first-order fundamental RC networks are presented in this paper. Combining these networks with these topologies, 62 types of RC active second-order filter can be composited, 54 types of these circuits have not yet been published. If more complex first-order RC networks are used. More second-order RC filters with single capacitor can be constructed. The experimental results, have proved that the analyses in theory are correct.2|127|3更新时间：2025-12-08
- 摘要：A compatible high quality TV system and its significance in developing the coming generation of TV system in our country are describled. An optimized method for the design of two-dimensional FIR digital filters is proposed. It is simple, convenient, reliable and time saving. The effectiveness of designed filters for compatible improvement of picture quality is verified by simulation experiment.2|19|1更新时间：2025-12-08
- 摘要：A fuzzy automatic control system directly realized by using of mul iple element logic （DYL） circuit is proposed. The principle of the system is to fuzzily quantify the input analogue quantities and to make a fuzzy decision according to human experience in controlling a certain object. The system will transfer the fuzzily quantified control quantities into the output analogue quantities, and then to control the desired objet. The distinguishing feature of the system are as follows: The unnecessity of using A/D and D/A transformations, the simplicity of the system structure, the convenience of regulation and the applicability to on-line and real time control and regulation.2|30|8更新时间：2025-12-08
- 摘要：An efficient method of channel ordering and routing for building block layout is presented in this paper. The concept of T-shaped constraint graph and the idea of channel classfication are introduced. The cycles in the channel precedence constraints are broken by introducing a kind of channels called as predetermined channel based on the routing of 3-side channel. On the base of these concepts, a algorithm for channel ordering and touting is described. The algorithm is implemented in FORTRAN-77 on UNIVAC 1100/10 with satisfactory results.2|18|2更新时间：2025-12-08
- 摘要：An unified method for converting MOS circuit level description into logic level description is presented. The experimental results show that the complexity of the algorithms introduced in this paper is linear.2|34|0更新时间：2025-12-08
- 摘要：The main problems of the optimal parameter extraction for IC bipolar model are analysed. A method of stepped global optimization of DC parameter is provided for GP model. This method includes the formulation of the forward reverse objective function, the step for parameter extraction, the determination of the iniatial values and the program of the parameter global extractions is developed. This paper introduces the successful application of the program to IC bipolar device.2|66|6更新时间：2025-12-08
- 摘要：The paper connects the terminal-based indefinite scattering matrix with the indefinite admittance matrix and normal scattering matrix, extending some results of the later two to the former. The conclusions achieved herein are helpful to circuit design and analysis, especially to microwave circuits. Some demonstrative applications are also discussed.2|34|0更新时间：2025-12-08
- 摘要：This paper derived a series of compact formulas depicting various return ratio matrices of a linear multi-input, multi-output and multi-loop feedback network in terms of the first- and the second-order cofactors and their partial derivatives as well as the third-order cofactors of the elements of the equicofactor matrix. The derivation was based on the useful results obtained by using the matrix signal-flow graph. Also, the computation problems of feedback matrices in the case of the direct transmission matrix being a diagonal matrix is solved.2|30|3更新时间：2025-12-08
- 摘要：In this paper, a frame synchronization multi-acquisition method is presented. The multi-acquisition ptobability expression for a fixed-chreshold is obtained. By means of theoretical analysis and computer simulation, it can be shown that on the basis of correct selection of the number of fault tolerance, the multi-acquisition probability can approach to a maximum value and with the increasing of the number of times of acqusition the maximum probabilty will be also increased, and the corresponding synchronization pattern length will be decreased. Using the multi-acquisiton method presented with the synchronization length given, the frame synchronization can be achieved with probability of one under serious noise level.2|40|1更新时间：2025-12-08
- 摘要：A gyro-peniotron effected in a centrifugal electrostatic focusing system is proposed. The perturbation solution of 3-D model for large-orbit relativistic E-beam under the action of HF field of TEmn or TMmn modes is derived. The dispersion equation and the analytic expression of normalized growth rate are obtained. Numerical analysis is carried out and it is found that the influence of the axial displacement of electron should not be ignored.2|29|1更新时间：2025-12-08
- 摘要：The principle of converting FM noise of the local oscillator into AM noise of the receiver due to the discrimination effect in agile radar is discussed. The phase-shifting discrimination and its effect on the receiver noise in the radar with a fast AFC subsystem are analysed and formulated. The methods to minimize the extra FM noise of LO and the discrimination effect are proposed so that the additional receiver noise can be effectively repressed. The practical results applied to several radars have proved these methods to be successful.2|33|0更新时间：2025-12-08
- 摘要：An overview of the development and the state-of-the-art of various millimeter-wave devices is described. Some of fundamental problems are also discussed. Applications of them are summarized.2|78|5更新时间：2025-12-08
- 摘要：A successive approximate solution about the eigenvalue equations of rectangular waveguide is given. This method is simpler and more exact. The Oth order approximate solution of propagation constant is in conformity with Marcatili’s result. The 1st order is comparatively close to the precise numerical result, the 2nd order is nearly equal to the precise numerical result.2|107|0更新时间：2025-12-08
- 摘要：Some Problems about the implementation of a deductive database system DRDB are dis-cussed. DRDB has been implemented in VAX-11/780 computer.4|12|1更新时间：2025-12-08
- 摘要：The error analysis for precision meaturement of resistivity of silicon wafer with thickness between 0.5 and 1.0mm is described. The calculating method for the uncertainty of precision measurement of the resistivity is presented.2|230|1更新时间：2025-12-08
- 摘要：A graphic method for finding the median is presented. If there are fewer points, by using this method, it is convenient to obtain the median with the least number of comparisons. As a comparison, for a median filtering of the graph through 3×3 window, this method is faster than the histogram method[1].2|102|0更新时间：2025-12-08
- 摘要：Walsh-Hadamard matrices with six different ordering are constructed recursively by using direct product and matrix multiplication. A row with assigned order of any one of these malices may be generated directly by the method introduced by Swick or Peterson without referring any previously generated rows.2|48|2更新时间：2025-12-08
- 摘要：The effect o{fthe factors in measuring the dispersion of a monomode optical fiber by phate-shift method are analyzed theoretically, and a new ideal to improve the minimum measurable signal to noise ratio is presented. Experimentally, the minimum measurable S/N ratio is achieved to lower than 20dB（E） and the measurable dynamic range is enlarged to over 20dB（O）.2|57|0更新时间：2025-12-08
- 摘要：Based on the electric potential-field hybrid integral equation system, a new approach to calculate the parameters of multi-conductor transmission lines is presented. It is a universal analysis method applicable to all the practical TEM and quasi-TEM transmission lines,2|189|2更新时间：2025-12-08
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