最新刊期
卷 ， 期 6 ， 1988
- 摘要：In this paper, the dynamic reliability of antenna reflector accuracy under wind vibration is studied. Based on the assumptions that the wind vibration reactions are mutually independent Gauss stationary processes and the cross points of reaction with boundary are approximately submitted to Poisson processes. The formulae of structural dynamic reliability under wind vibration are set up. The dynamic reliability of antenna reflector accuracy is analysed and corresponding computer program is designed. Finally, the computation results of a large antenna structure in a certain engineering are presented.2|71|3更新时间：2025-12-08
- 摘要：A new type of waveguide discontinuities-capacitive fin-septa windows are investigated by use of the resoance method combined with singular integral equation technique. Two ideal short circuiting planes are inserted at some distances from reference planes of the window so that the configuration forms a closed resonantor. Based on the resonant condition the equivalent parameters of the window are expressed in terms of the resonant distances between the reference planes and the shorting planes. The characteristic equation for the dista- nces with superior convergence is derived by using singular integral equation technique. As example, the equivalent parameters of a capacitive bilateral fin-septa window are computed. When the structure is degenerated into a capacitive metal window with zero thickness, the numerical results show good agreement with available data in the literatures.2|23|1更新时间：2025-12-08
- 摘要：In this paper,the interior of a simply-connected region with arbitrarily complex form is transformed into the interior of a unit circle by Melentiv’s method and a formula is presented for determining the characteristic impedance of a coaxial transmission line consisting of a circular inner conductor and an irregular outer conductor. The validity of the formula is confirmed by numerical results.2|67|2更新时间：2025-12-08
- 摘要：In this paper, a new kind of actve filters of ladder simulation using negative impedance converters （NIC） is given. They have such outstanding merits as stability of circuits, large dynamic range, easiness of regulation. They can be made into high quality active RC filter. It is shown that the conditions for stability and for large dynamic range are consistent and the essential factor affecting the stability of NIC is self locking.2|42|0更新时间：2025-12-08
- 摘要：A canonical biquad structure which consists of single transconductance elements and capacitors is described. This biquad circuit topology is analyzed and various circuits topology and their transfer function, pole frequency, zero frequency and quility factor are given. The gain, frequency and Q of these filters can be controlled, because the value of the transconductance element is controlled with a voltage. As an example, an 8 order 4 section biquad cascaded bandpass filter is designed and simulated with SPICE programm. The result meets the demand for the design.2|55|1更新时间：2025-12-08
- 摘要：An analysis of the amplification mechanism for the optical fiber amplifier by evanescent wave coupling is presented in this paper. Formulae for calculating gain coefficient and interaction length of the amplifier are obtained. The results reported here serve as theoretical basis for designing optical fiber amplifier.2|67|1更新时间：2025-12-08
- 摘要：Ba thin film on the Ni base is studied by means of AES. We have measured the Ⅰ-Ⅴ emission characteristic of oxidized Ba films and the influence of thinckness of Ba film on the work function. The results show that the work function drops to a minimun value at an appropriate amount of oxygen, during the oxidation of the Ba film. It can be explained by the role of dualistic property of oxygen and supports the point of view in the model of dynamical surface emission centers.2|15|0更新时间：2025-12-08
- 摘要：Decompilation method is one of the major clause representations proposed to support database operations in compiler-based Prolog systems. An efficient implementation is presented in this paper, which allows a clause with sophisticated forms as in most of existing Prolog systems. The architectural supports are illustrated as well as the detailed decompilation procedures in Prolog.2|20|0更新时间：2025-12-08
- 摘要：The concept of single value dyadic autocorrelation codes was proposed and studied in detail by the V-Boolean function.2|26|16更新时间：2025-12-08
- 摘要：By means of mode match technique, the equation for obtaining finline equivalent reactance xx, xD is found. The method of numerical solution of that equation and its generality under the condition of meeting the requirement for accuracy in engineering design is discussed. The optimized design of mm-wave finline filter is effected by this new method.2|151|9更新时间：2025-12-08
- 摘要：A Multiresolution simultaneous auto regressive model （MRSAR/MRRISAR） is suggested. The multiresolution rotation-invariant simultaneous auto regressive （MRRISAR） texture classification system is also designed. Many experiments prove that this system has many perfect properties, such as, very strong classification power,wide scope of applicotion, very good property of rotation invariance, and high speed for recognition, etc.2|198|20更新时间：2025-12-08
- 摘要：The stability problem of linear time-variant （LTV） digital filters is discussed in this paper. The sufficient and necessary conditions for the stability of LTV digital filters are giren for the time and frequency domain. The method to test the stability of slowly-varying or periodically time-varying recursive digital filters is obtained.2|105|2更新时间：2025-12-08
- 摘要：The public-key cryptosystem presented in this paper is protected by a matrix conjugate transformation. Its digital signature scheme is very simple with high security and is applicable to small computers directly. There is posibility to be put into practical use.2|36|0更新时间：2025-12-08
- 摘要：In this paper, a new method of design centering to raise yield products of electric circuits is proposed. First, an objective function for choosing fine initial values of the components is established. Fine initial values of the components are chosen by optimizing the objective function.Second, in this paper the method of Monte Carlo analysis is combined with the method for calculating from a Taytor-series approximation both for estimating yield and for choosing new normal vatues of the components. A program MAIN for design centering is given. The results of the examples illustrate that methods proposed are right and efficient.2|13|1更新时间：2025-12-08
- 摘要：In this paper the computation method used for the case of adopting B-spline is geven. Several typical results of simulation by computer are presented and the nice performance and application potentiality of B-spline in data processing are analyzed.2|47|0更新时间：2025-12-08
- 摘要：The conditions and methods for the error-detecting and error-correcting in maximum detectable range are presented when range ambiguties are solved by Chinese Remainder Theorem in multiple PRF pulse doppler radar. If the conditions are satisfied, multiple PRF can be obtained with its precision being the same as a single PRF. The methods suggested are so simple that they can be used in real time processing.2|75|15更新时间：2025-12-08
- 摘要：In this paper the definition of bioelectronics and a survey on the related research areas are proposed firstly. Then some research topics are introduced, especially those which have developed quickly in recent years and in which a direct interaction exists between electronics and life science, not limited to applying engineering to biology and medicine. It is shown that bioelectronics as a new discipline is very important for the future development of science and technology.2|162|0更新时间：2025-12-08
- 摘要：An optimum algorithm is described to search tables by N divisions with vector. It’s more 10 times faster than any traditional one.2|16|1更新时间：2025-12-08
- 摘要：In this paper, by means of treating the E.M. field problem of a double Y-junction circulator as a six-port net-work with symmetric nonreciprocal junction, the impedance matrix of the network is derived. On the basis of the principle of field matching at each port, three impedance eigenvalues of the symmetrical three-port dual Y-junction are obtained. By using the equation of eigenvalue, two circulating conditions are achieved. The normalized curves of the normal junction admittance, the field variables and the magnetic parameters are obtained with the circulating conditions satisfied. Finally, a new design approach for circulator is proposed with some normalized design examples of some classical circulator attac-hed. The forward and reverse frequency response characteristics are calculated.2|104|19更新时间：2025-12-08
- 摘要：In this paper a new idea-transmission matrix of sensitivity for active linear networks and a new operation-circular multiplication of matrix are provided. It has been shown that sensitivity-mat-rix of arbitrary order can be expressed by transmission matrix and its circular multiplication. The analysis in theory and computer simulation indicate that this new method features fewer calculations, easiness in programming, and saving of storage.2|27|1更新时间：2025-12-08
- 摘要：A stable quasi-cascade adaptive ⅡR filter（SQCAF） and a stable parallel adaptive ⅡR tilter（SPAF） are presented in this paper. In the SQCAP and SPAF, the parameters are updated by the gradient projection method so that the system stabilities are guaranteed in adapting. The SQCAF and SPAF have not only the low sensitivties but also a simple method to form the gradient projection with a direct manner so that a simple adapting filtering algorithm can be realized. Therefore, both SQCAF and SPAF are suitable for real time applications. Also, a computer simulation is given.2|49|2更新时间：2025-12-08
- 摘要：A calculation method for long wavelength optical fiber communication receiver with SAGM-APD detector is presented in the paper. At first, the difference of calculation methods for the gain fac-tor（M0） and the excess noise factor F（M0） from traditional APDS which are made up of Si or Ce is studied. Then the influence of the trap of holes at the heterojunction interface and the avalanche buildup time on bandwidth of SAGM-APD is described. Lastly, the relationships between receiver sensitivities in a high rate region and bit rates and between optimum gain factor and bit rates are deduced.2|43|0更新时间：2025-12-08
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