The need for ATE (automatic testing equipment) and its advantages over manual testing and diagnosis are discussed. The importance of an expert system using rule-based techniques to test and trouble-shoot radio equipme...
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The need for ATE (automatic testing equipment) and its advantages over manual testing and diagnosis are discussed. The importance of an expert system using rule-based techniques to test and trouble-shoot radio equipment is considered. The test system software kernel solves the problems using a computer model of expert human engineering, implementing AI (artificial intelligence) techniques. Automatic diagnostic aids locate faults specifically and rapidly using a fault dictionary (rule knowledge file), a guided probe or a combination of both.< >
The authors use methods of stochastic approximation to convert iterative algorithms for maximizing the Kullback-Liebler information measure (1959) into sequential algorithms. Special attention is given to the case of ...
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The authors use methods of stochastic approximation to convert iterative algorithms for maximizing the Kullback-Liebler information measure (1959) into sequential algorithms. Special attention is given to the case of incomplete data, and a variety of algorithms are presented to deal with situations of that kind. The authors consider the application of these algorithms to the identification of finite-impulse-response (FIR) systems.< >
The design issues and implementation of a fault-tolerant multiprocessor system are addressed. Two design alternatives, termed failsafe and failsafe-redundant, are presented. The modular software presented previously b...
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The design issues and implementation of a fault-tolerant multiprocessor system are addressed. Two design alternatives, termed failsafe and failsafe-redundant, are presented. The modular software presented previously by the authors (1989) for a tri-module redundant (TMR) system is easily transportable to the proposed architecture. The results of a reliability analysis for the two design schemes are presented. The proposed arbitration schemes can be integrated in LSI for improved reliability.< >
Users are building their own environments, using a mix of the optimum hardware and software for their individual needs. By piecing together their own solutions, users are turning to frameworks to integrate this hardwa...
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Users are building their own environments, using a mix of the optimum hardware and software for their individual needs. By piecing together their own solutions, users are turning to frameworks to integrate this hardware/software mix. A framework can provide the functionality to organize, track, manage, and analyze the entire design process, across platforms and tools. The author focuses on how frameworks, and, in particular, open frameworks supplied by third-party vendors, can help users achieve their goal of integration. The function of the framework is to organize, manage, control, and analyze these tools, data, and resources as they relate to the design process. It can do all this graphically, for even the most complex functionality. A discussion is also presented as to where the framework fits.< >
A description is given of the intelligent programmable logic controller (IPLC) software package, which was designed in the inferencing language Prolog. IPLC provides front-end intelligence for the programmable logic c...
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A description is given of the intelligent programmable logic controller (IPLC) software package, which was designed in the inferencing language Prolog. IPLC provides front-end intelligence for the programmable logic controller. IPLC has the ability to analyze, intelligently, plant system knowledge held on a computer so as to make decisions on how to control a process. IPLC is able to generate ladder logic programs for the PLC and synthesize a new control routine when a fault is reported on the process plant.< >
A description is given of the architecture of the TX1, which is the first 32-bit microprocessor of the Toshiba TX series. The TX1 supports 92 instructions including high-level instructions for efficient use of compile...
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A description is given of the architecture of the TX1, which is the first 32-bit microprocessor of the Toshiba TX series. The TX1 supports 92 instructions including high-level instructions for efficient use of compilers and operating systems. The effectiveness of the high-level instructions was evaluated by comparing their execution cycles on the TX1 board computer with their equivalent programs using only basic instructions, and it was found that they could execute about two or four times as fast as the equivalent programs. About 27% performance improvement was achieved by using the high-level instructions in the Dhrystone benchmark program.< >
Beginning with the structure of the telecommunication system, a discussion is presented of the actual and projected telecommunication facilities available in rural Bangladesh. The discussion covers the telegraph servi...
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Beginning with the structure of the telecommunication system, a discussion is presented of the actual and projected telecommunication facilities available in rural Bangladesh. The discussion covers the telegraph service, the rural public call office, the upazila telecommunication system and, nationwide dialing (NWD). The rural telecommunication projects are presented with starting and completion dates.< >
In this paper, a model of homogeneous, asymptotically reliable serial production lines is introduced, analyzed, and applied to performance evaluation of a modular paint shop at an automobile assembly plant. The result...
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In this paper, a model of homogeneous, asymptotically reliable serial production lines is introduced, analyzed, and applied to performance evaluation of a modular paint shop at an automobile assembly plant. The results obtained indicate that the homogeneous, asymptotically reliable production lines are, on one hand, much simpler for analysis than the traditional models discussed in the literature for the last 25 years and, on the other hand, are sufficiently rich to reflect the behavior of real manufacturing systems. The asymptotic theory developed here gives analytical formulae for production rates as a function of system parameters and, therefore, can be used as an inexpensive tool for analysis and design of manufacturing processes in mass production systems eliminating, in certain cases, the necessity of complex and costly computer simulations.
A data model for multimedia applications, called MeSOD (metric spatial object data model), is proposed. This model maps entities in the real world onto metric spaces. The MeSOD is motivated by an electronic book syste...
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A data model for multimedia applications, called MeSOD (metric spatial object data model), is proposed. This model maps entities in the real world onto metric spaces. The MeSOD is motivated by an electronic book system, called the hyperbook system, that enables users to interact with the system using multimedia information. The hyperbook system is introduced and the problems in implementing multimedia communications is indicated. Then the concept and the advantage of the MeSOD are discussed, and an informal definition of the MeSOD is given. The design of the MeSOD's applications development environment, MADE, is discussed.< >
A positioning actuator based on the principles of magnetic attraction and elastic repulsion is presented. The principle of operation of the actuator is simple and resembles that of a caterpillar. Three electromagnets ...
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A positioning actuator based on the principles of magnetic attraction and elastic repulsion is presented. The principle of operation of the actuator is simple and resembles that of a caterpillar. Three electromagnets are arranged in line and placed on a ferromagnetic surface. When energized, the two outer electromagnets, E1 and E2, adhere to the surface, anchoring the assembly. The central electromagnet, E2, affixed to E1 and called a motion electromagnet, attracts, when energized, a yoke affixed to E3, overcoming the resilience of an elastic link that joints E2 and the yoke in such a manner that the gap between them can be completely closed. To stop the assembly, either both the outer electromagnets (open-gap standstill) or all three electromagnets (closed-gap standstill) are energized simultaneously. In both cases, the assembly holds on to the ferromagnetic surface. Functional models of a one degree-of-freedom and three degree-of-freedom motion actuators have been built and investigated experimentally.< >
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