فهرست مطالب

Journal of Advances in Computer Research
Volume:13 Issue: 2, Spring 2022

  • تاریخ انتشار: 1401/05/02
  • تعداد عناوین: 4
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  • Razieh Asgarnezhad Pages 1-13

    Diagnosis of diabetes is a classification problem that attracts more in recent years. Diabetes mellitus happens when the whole body cannot provide an adequate quantity of insulin to adjust glucose levels. In the low insulin level, food products in glucose are turned into glucose, improving the sugar to a more than average level. All existing works show that many techniques are successful for this disease, Artificial Intelligence. There exist many classification models to aim the prediction of diabetes. We introduce a novel model to investigate the role of pre-processing and data reduction for classification problems in the diagnosis of diabetes. The model has four steps consisting of Pre-processing, Feature sub-selection, Classification, and Performance. In the classification technique, we apply the voting technique with three classifiers. Many experiments were conducted to reveal the performance of the proposed work for the diagnosis of diabetics. The results confirmed the superiority of our model over its counterparts, and the best accuracy, precision, recall, and F1 were achieved at 96.67, 100, 100, and 94.01%, respectively.

    Keywords: Data Mining, Classification, Voting, Data Reduction
  • Sima Sivandi Pages 15-21

    An optimal scheduling reduces the completion time (makespan) of jobs, and finally increase profits in today's competitive environment. Open shop scheduling problem (OSSP) involves a set of activities that should be performed on a limited set of machines. The aim of scheduling in an open shop is to provide a schedule for the execution of the entire operation so that the completion time of all operations is reduced. OSSP has a large solution space and belongs to NP-hard problems. So far, various algorithms are developed for OSSP. In this paper we propose a new optimization algorithm named Bat Algorithm (BA) for solving OSSP which has a relative advantage over other algorithms. Experimental results show that the proposed algorithm has high performance and increases the reliability and efficiency of the system.

    Keywords: Open Shop, Bat Algorithm, Scheduling, Completion Time of Jobs
  • Faraein Aeini, Mojtaba Nasri Panbe Choole, Abdolreza Babaei Pages 23-37

    Due to the increase in the sending of medical, military, financial, etc., the need to use processing and encryption in sending images to ensure the non-abuse transmission is essential. Image encryption has come to the attention of researchers in recent years because of its function in maintaining security and hiding confidential information in images. In this paper, the chaos system was suggested to increase the security of images sent in the network. On the other hand, the proposed method proposed a fast Fourier transform to reduce the processing load using composite images. By combining different parts of the images and encrypting them by chaos and Fourier transform, the original images will not be easily detectable, ensuring the security of the submitted images. The evaluation results showed that in addition to reducing the processing volume and execution time, the security of the composite images was also established by the proposed method.

    Keywords: Image Security, composite images, Fourier transform, chaos system
  • Zahra Rahmani Ghobadi Pages 39-44

    Today , almost everyone in the world is directly or indirectly affected by computer systems. Therefore, there is great need for looking at availability in computer systems. Availability is mandatory requirement for many applications. Since the software availability declines with the execution time, also, software aging is a relevant issue in this field. Software aging is a cumulative process that leads long-running systems to age or fail. Software rejuvenation is used to prevent software aging problems. Software rejuvenation measures include rebooting the system or restarting the software to bring the software to a new stable state or empty the memory . In this paper, we intend to use a combination of time-based and measurement-based rejuvenation. Finally , with a numerical example, we compare the combined rejuvenation method with time-based and measurement- based rejuvenation, the results we achieve show this mechanism ensures software availability.

    Keywords: Software Rejuvenation, Aging, Availability