The importance of documentation in the sense of information on the use of computersystems is growing with the number of computersystems, which are used by novices in the field of data processing. In this paper a des...
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The importance of documentation in the sense of information on the use of computersystems is growing with the number of computersystems, which are used by novices in the field of data processing. In this paper a description and systematic organization of concepts related to documentation in this sense is attempted. A phase model relates the documentation procedure to these concepts.
It is well known in a multiprocessor system that the reduction of the system throughput is chiefly attributable to its memory access conflicts. A new method has been proposed which can avoid the memory access conflict...
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It is well known in a multiprocessor system that the reduction of the system throughput is chiefly attributable to its memory access conflicts. A new method has been proposed which can avoid the memory access conflicts by means of realizing a conflict-free data mapping through a new technique of reorganizable memory structure. This paper describes some examples of parallel processing algorithms suitable for the proposed multiprocessor system with reorganizable memory structure.
The authors consider the possibility of using the apparatus of Petri networks for simulating the management of computational processes in multiprocessor structures that implement a set of major operations, in processi...
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The authors consider the possibility of using the apparatus of Petri networks for simulating the management of computational processes in multiprocessor structures that implement a set of major operations, in processing conventional and fuzzy information.
A new breed of computersystems, expert systems, has emerged from artificial intelligence research to solve problems normally requiring the reasoning of human experts. Such systems tackle complexity by drawing support...
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A new breed of computersystems, expert systems, has emerged from artificial intelligence research to solve problems normally requiring the reasoning of human experts. Such systems tackle complexity by drawing support from an expert knowledge base. An important use of such systems is in computer aided design. The development of an expert system requires the collaboration of a specialist and a computer scientist. Problem solving is carried out by searching for sequences that lead to solutions that satisfy a goal.
The article considers a fragment of a computer system with a variable mode of operation. The process of change of mode is an inhomogeneous Markov process. It is shown that, under conditions in which fitting of the cha...
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The article considers a fragment of a computer system with a variable mode of operation. The process of change of mode is an inhomogeneous Markov process. It is shown that, under conditions in which fitting of the characteristics occurs at the instants of mode change, the unconditional expected values (EV) are determined by a system of linear differential equations (SLDE) that can readily be obtained by transforming the SLDE that describe the behavior of the system in each of the modes separately.
Mutual exclusion between process and interrupt-driven execution is normally confined by the designer to passages within the kernel of an operating system and has been implemented traditionally by the judicious use of ...
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Mutual exclusion between process and interrupt-driven execution is normally confined by the designer to passages within the kernel of an operating system and has been implemented traditionally by the judicious use of the interrupt inhibit instruction. This paper illustrates an alternative approach to the problem through the implementation of the conflicting software and hardware-driven kernel primitives as a limited set of concurrent subprocesses sharing a singular kernel domain. Manipulations of kernel data are rendered mutually exclusive through the use of P and V operations on simple semaphores associated with the data objects themselves. The kernel programmer is thereby relieved of real-time considerations in guarding his critical sections and the implementation of the kernel acquires a formalism which can greatly aid its verification, testability and maintainability.
The article considers a computer system consisting of two computers of different classes;the job servicing intensity of the first is greater than that of the second. The system input receives two elementary streams of...
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The article considers a computer system consisting of two computers of different classes;the job servicing intensity of the first is greater than that of the second. The system input receives two elementary streams of requests of differing intensity. Requests are allocated to queues to the servicing devices by an adaptive automaton which alters the strategies of assignment of requests to the queues in accordance with the changing conditions of the system input. The stationary distribution of the state probabilities of the process describing the behavior of the system, as well as the adaptation error probability for the adaptive automaton, are obtained, and the parameters of the latter are optimized (from the condition of minimum adaptation error probability).
The cardinality predicting problems on various set-theoretical operations such as intersection, projection and join, are proposed and their computational complexity is investigated in terms of the number of comparison...
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The cardinality predicting problems on various set-theoretical operations such as intersection, projection and join, are proposed and their computational complexity is investigated in terms of the number of comparisons on two types of the computing model. Those results are all optimal within constant factors. An approximation algorithm for computing the cardinality of join is also presented.
The detailed record of the development of a computer program, including its maintenance, modification and testing histories - in other words, software documentation - is a necessary peripheral in the development, eval...
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The detailed record of the development of a computer program, including its maintenance, modification and testing histories - in other words, software documentation - is a necessary peripheral in the development, evaluation, purchase and ongoing use of custom or prewritten software. The various components of full documentation and their functions and usefulness for both vendor and user are described.
In a multiprocessor system where the number of processors composing the system is increased and the memory utilization is raised by improving the execution rate of each processor, the reduction of system throughput ca...
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In a multiprocessor system where the number of processors composing the system is increased and the memory utilization is raised by improving the execution rate of each processor, the reduction of system throughput caused by the memory access conflicts has to be considered substantially. A discussion is given of conflict-free data mapping by the use of sophisticated address translation between logical and physical addresses. This approach permits the memory structure to reorganize so as to make it adaptive to the parallelism contained in the problems themselves.
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