Scheduled System Maintenance:
On Monday, April 27th, IEEE Xplore will undergo scheduled maintenance from 1:00 PM - 3:00 PM ET (17:00 - 19:00 UTC). No interruption in service is anticipated.
By Topic

Systems Engineering and Electronics, Journal of

Issue 1 • Date March 1994

Filter Results

Displaying Results 1 - 12 of 12
  • [Front cover]

    Publication Year: 1994 , Page(s): c1
    Save to Project icon | PDF file iconPDF (655 KB)  
    Freely Available from IEEE
  • Copyright page

    Publication Year: 1994 , Page(s): 1
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (663 KB)  

    The journal of Systems Engineering and Electronics is published in Chinese and in English. The Chinese edition (ISSN 1001-506X, first issue in 1979) comes out monthly with English abstracts, and the English edition (ISSN 1004-4132, first issue in 1990) comes out quarterly. Both are high-tech oriented. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Contents

    Publication Year: 1994 , Page(s): 1
    Save to Project icon | PDF file iconPDF (147 KB)  
    Freely Available from IEEE
  • Application of superresolution techniques to radar imaging

    Publication Year: 1994 , Page(s): 1 - 14
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (6462 KB)  

    Modern spectral estimation techniques (superresolution in technical jargon) have been applied to many fields of signal processing since many years[l], [2]. Application to radar imaging, mainly to ISAR (Inverse Synthetic Aperture Radar) is documented in some recent papers[3] to [6]. Appiications have been attempted also to SAR (Synthetic Aperture Radar)[7], [8]. In these fields the benefit of spectral estimation reveals in a resolution beyond the Rayleigh limits set by compressed pulse and synthetic aperture lengths. Furthermore very low sidelobes of point scatterer response are obtained. In this paper superresolution has been applied both to stepped-frequency ISAR data and to real ERS-1 SAR data; the achieved results are encouraging and suggest a more extensive practical application of the technique. The paper is organised in two parts. In the first we have applied the autoregressive (AR) and the minimum variance (MV)-Capon methods to improve the range resolution of simulated ISAR data. In the second part we have conceived an upgraded version of spectral analysis (SPECAN) processing to obtain a SAR image of better quality. The method has been tested on recorded live data of ERS-1 mission. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Effects on sum and difference patterns by adaptive null

    Publication Year: 1994 , Page(s): 15 - 23
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (859 KB)  

    This paper presents a simple method of forming sum and difference patterns with adaptive nulls. The effects on the sidelobe level and the pointing null of difference pattern by adaptive null are analyzed. The result that the increment value of the envelope of the sidelobe level under the effect of a null is less than 1.6dB is proved. The formula about shift value of the pointing null which is the function of the jammer direction and array parameters is given in the paper. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Experimental studies of adaptive conscious systems

    Publication Year: 1994 , Page(s): 25 - 35
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1514 KB)  

    Human consciousness is the most interesting and mysterious phenomenon in the world, In this paper, the results of the computational studying and simulation of the conscious behaviour, such as the learning of language and image patterns, traditional conditioning, association, imagination and dream, have been presented. Based on these results, an experimental conscious system — CONSCITRON, has been developed. Further discussion on development of adaptive conscious systems is also provided. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A routing algorithm for distributed optimal double loop computer networks

    Publication Year: 1994 , Page(s): 37 - 43
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (807 KB)  

    A routing algorithm for distributed optimal double loop computer networks is proposed and analyzed. In this paper, the routing algorithm rule is described, and the procedures realizing the algorithm are given. The proposed algorithm is shown to be optimal and robust for optimal double loop. In the absence of failures, the algorithm can send a packet along the shortest path to destination; when there are failures, the packet can bypasss failed nodes and links. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The analysis and numerical simulation of dynamical functions of the transpiration cooling control system with surface ablation

    Publication Year: 1994 , Page(s): 44 - 52
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1008 KB)  

    This problem is a nonlinear control system with variable-domain distributed parameter. In this paper, the numerical simulation of the dynamic functions has been carried out by transforming this problem to a fixed-domain initial-boundary value problem, and the numerical results are obtained: (1) The distribution of temperature rises, the ablation amount and velocity of the thermal shield vary with the time; (2) The maximum ablating velocity, the time of the ablation beginning and ending related to the transpiration quantity. This method succeeds in overcoming the difficulty brought up by variable domain. On the other hand, the critical transpiration quantity for the surface to start ablating, the maximum ablating velocity and time of the ablation ending are obtained theoretically. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Probabilistic analysis and multicriteria decision for machine assignment problem with general service times

    Publication Year: 1994 , Page(s): 53 - 61
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (925 KB)  

    In this paper we carried out a probabilistic analysis for a machine repair system with a general service-time distribution by means of generalized Markov renewal processes. Some formulas for the steady-state performance measures, such as the distribution of queue sizes, average queue length, degree of repairman utilization and so on, are then derived. Finally, the machine repair model and a multiple criteria decision-making method are applied to study machine assignment problem with a general service-time distribution to determine the optimum number of machines being serviced by one repairman. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multiple objectives under uncertainty: IRGSD-FD method

    Publication Year: 1994 , Page(s): 62 - 76
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1693 KB)  

    This paper is devoted to study the multiobjective system programming under the assumption that some of the problem parameters are random variables. A method called Interactive Reference Goal Satisfied Degree and Feasible Degree (IRGSD-FD) is developed to solve stochastic multiobjective problems. It is an interactive method providing a so-called “dialogue” between the user and the model, the decision maker having the option conducting the search process for the (α, β) — efficient solutions by modifying the initial conditions according to the partial results obtained. During the iterations, the decision maker can improve upon the reference goal or called aspiration level already attained by one objective function as well as upon the probability of reaching the corresponding objective or called satisfied degree (or both), or / and the probability of satisfying the constraint or called feasible degree already attained by the constraint. Finally, the application of IRGSD-FD method in the resource allocation problem is discussed with a case study for project investment management. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The incompatibility between Lorentz transformations and the inertial frame of reference

    Publication Year: 1994 , Page(s): 77 - 80
    Save to Project icon | PDF file iconPDF (511 KB)  
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Remarks

    Publication Year: 1994 , Page(s): 1
    Save to Project icon | PDF file iconPDF (159 KB)  
    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

Journal of Systems Engineering and Electronics reports the latest developments and achievements in both theoretical and practical aspects of systems engineering, electronics and related research areas.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Professor Rong Shi
Journal of Systems Engineering and Electronics