• Title/Summary/Keyword: Real Time System

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실시간 전문가 시스템의 개발 및 활용에 관한 연구

  • 황하진
    • The Journal of Information Systems
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    • v.5
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    • pp.411-427
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    • 1996
  • As the application of real time expert systems has been expanded, the real time expert systems have become an integral part of the information society. Real time expert systems are viewed as a new paradigm to integrate real time problem solving and expert system technology. However, a substantial amount of work is still required to effectively handle a new and challenging opportunity for successful implementation of real time expert systems. In this article, the basic concepts and characteristics of real time expert systems are discussed. The article also presents, through the literature survey, the summary of real time expert systems applications and a class of tools, providing an enabling real time based expert system technology. Finally, the article discusses a set of requirements which real time expert systems must satisfy.

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CMOS Image Automatic Exposure System With Real-time and Robustness Style for the Journal of Korean Contents (실시간성과 강건성을 갖는 CMOS 자동노출 시스템)

  • Choi, Wonseok;Kim, HeeSu;Kim, Jaehyun;Cho, Youngki;Choi, Sungho;Lee, Yongseon
    • The Journal of the Korea Contents Association
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    • v.20 no.10
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    • pp.1-13
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    • 2020
  • There are many factors that influence the image quality of CMOS camera images, among which the image exposure time is an important factor. If the image exposure time is long, the entire image on the screen becomes brighter. If the exposure time is shorter, the entire image becomes darker. When photographing a still image, real time is not required because the automatic exposure system is given sufficient time to obtain an appropriate exposure time. However, if the surroundings and environment change rapidly like the black box of a driving car, the exposure time should be applied in response to real time. To this end, a robust automatic exposure system for real-time performance and ambient light environment is required. An automatic exposure system that has real-time capability and is robust against the ambient light environment is required. we designed a real-time control sysem capable of parallel operation processing through the design of an embedded system using zynq's logic and ARM core, and developed a real-time CMOS automatic exposure system that is robust to noise and converges to a desired target value within 66 ms through PID control.

Fault detection using heartbeat signal in the real-time distributed systems (실시간 분산 시스템에서 heartbeat 시그널을 이용한 장애 검출)

  • Moon, Wonsik
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.14 no.3
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    • pp.39-44
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    • 2018
  • Communication in real-time distributed system should have high reliability. To develop group communication Protocol with high reliability, potential fault should be known and when fault occurs, it should be detected and a necessary action should be taken. Existing detection method by Ack and Time-out is not proper for real time system due to load to Ack which is not received. Therefore, group communication messages from real-time distributed processing systems should be communicated to all receiving processors or ignored by the message itself. This paper can make be sure of transmission of reliable message and deadline by suggesting and experimenting fault detection technique applicable in the real time distributed system based on ring, and analyzing its results. The experiment showed that the shorter the cycle of the heartbeat signal, the shorter the time to propagate the fault detection, which is the time for other nodes to detect the failure of the node.

Implementation of a Labview Based Time-Frequency Domain Reflectometry Real Time System using the PXI Modules (PXI모듈을 이용한 랩뷰 기반 시간-주파수 영역 반사파 실시간 계측 시스템 구현)

  • Park, Tae-Geun;Kwak, Ki-Seok;Park, Jin-Bae;Yoon, Tae-Sung
    • Proceedings of the KIEE Conference
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    • 2006.04a
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    • pp.336-338
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    • 2006
  • One of the important topics concerning the safety of electrical and electronic system is the reliability of the wiring system. The Time-Frequency Domain Reflectometry(TFDR) is a state-of-the-art system for detection and estimation of the fault on a wiring/cable. The purpose of this paper is to implement a Labview based TFDR Real Time system though the instruments of PCI extensions for Instrumentation(PXI). The TFDR Real Time system consists of the five parts: Reference signal design, signal generation, signal acquisition, algorithm execution, results diplay part. In the signal generation and acquisition parts we adopt the Arbitrary Waveform Generator(AWG) and Digital Storage Oscilloscope(DSO) PXI modules which offer commonality, compatibility and easy integration at low cost. And execution of the PXI modules not only is controlled by the Labview programing but also the total system process is executed by the Labview application software.

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Rapid Identification of Vibrio vulnificus in Seawater by Real-Time Quantitative TaqMan PCR

  • Wang, Hye-Young;Lee, Geon-Hyoung
    • Journal of Microbiology
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    • v.41 no.4
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    • pp.320-326
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    • 2003
  • In order to identify Vibrio vulnificus in the Yellow Sea near Gunsan, Korea during the early and late summers, the efficiency of the real-time quantitative TaqMan PCR was compared to the efficiency of the conventional PCR and Biolog identification system^TM. Primers and a probe were designed from the hemolysin/cytolysin gene sequence of V. vulnificus strains. The number of positive detections by real-time quantitative TaqMan PCR, conventional PCR, and the Biolog identification system from seawater were 53 (36.8%), 36 (25%), and 10 strains (6.9%), respectively, among 144 samples collected from Yellow Sea near Gunsan, Korea. Thus, the detection method of the real-time quantitative TaqMan PCR assay was more effective in terms of accuracy than that of the conventional PCR and Biolog system. Therefore, our results showed that the real-time TaqMan probe and the primer set developed in this study can be applied successfully as a rapid screening tool for the detection of V. vulnificus.

A Real-Time Sound Recognition System with a Decision Logic of Random Forest for Robots (Random Forest를 결정로직으로 활용한 로봇의 실시간 음향인식 시스템 개발)

  • Song, Ju-man;Kim, Changmin;Kim, Minook;Park, Yongjin;Lee, Seoyoung;Son, Jungkwan
    • The Journal of Korea Robotics Society
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    • v.17 no.3
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    • pp.273-281
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    • 2022
  • In this paper, we propose a robot sound recognition system that detects various sound events. The proposed system is designed to detect various sound events in real-time by using a microphone on a robot. To get real-time performance, we use a VGG11 model which includes several convolutional neural networks with real-time normalization scheme. The VGG11 model is trained on augmented DB through 24 kinds of various environments (12 reverberation times and 2 signal to noise ratios). Additionally, based on random forest algorithm, a decision logic is also designed to generate event signals for robot applications. This logic can be used for specific classes of acoustic events with better performance than just using outputs of network model. With some experimental results, the performance of proposed sound recognition system is shown on real-time device for robots.

A Study on the Data Visualization for Real Time Power System Operation (실시간 전력계통 운영을 위한 데이터 시각화에 관한 연구)

  • Chog, Yoon-Sung;Joung, Jinyoung
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.62 no.10
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    • pp.1361-1367
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    • 2013
  • This paper describes and suggests the data visualization for real time power system operation based on energy management system. Because real time power system operation performs analysis of the vast amount of on-line data, the operators need intuitive data visualization to find out useful information in the big data. Especially, in emergency situation, the data visualization is able to assist the operators in handling the crisis quickly and efficiently. Therefore, this paper aims to improve displays of output of real time power system operation by visualizing on-line big data. Through this study, we can develop improved visualization technique for real time power system operation, which has highly readable displays of output and intuitive information.

A Design for the Real-Time Enterprise based Logistics Information System of Postal Service (실시간 기반 우편 물류 정보시스템 모형 설계)

  • Sun, Ji-Ung;Song, Young-Hyo
    • IE interfaces
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    • v.20 no.2
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    • pp.162-176
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    • 2007
  • As facing the rapid advance of information technologies, the postal service is required to have capabilities of real-time logistics characterized by collaboration, ubiquity and intelligence which are necessary to the organizational management. In this study we discuss the design of the next generation information system based on real-time enterprise strategy to achieve real-time integrity and upgrade of postal information system. After briefly addressing the issues on developing information system and current situation, we provide the design direction and the framework of the to-be system. We develop detailed specification of each subsystem and provide an operational scenario. We believe when this framework is put into use, it can contribute to competitive performance by giving the integrity and consistency in implementing information systems of the Korea Postal Service.

Real-Time Web Middleware Framework for Supporting Electronic Commerce (전자상거래를 지원하기 위한 실시간 웹 미들웨어 프레임워크)

  • Yoon, Eun-Young;Yoon, Yong-Ik
    • The Transactions of the Korea Information Processing Society
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    • v.7 no.5S
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    • pp.1666-1675
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    • 2000
  • This paper proposes a RTWM (Real-Time Web Middleware) framework for real-time EC(Electronic Commerce) systems. RTWM system is extended the existing COS( CORBA Object Service) model added to the event monitoring, real-time scheduler, real-time event filtering for supporting real-time concept of EC systems. Especially, this paper is concentrated on providing suitable event filtering function for EC system in order to meed various user time requirements under distributed system environment. It stores time constraint requirements an interesting event information input from users into QoS repository, then processes the data through appropriate RTFA(Real-Time Filtering Agent) module when real-time events occur. From this method, users can get the filtered event result reflected their requirements about real-time filtering. It means this system provides thigh QoS to users. In addition, it results in decreasing network traffic as unnecessary event information is filtered from network.

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Design and Implementation of a Hybrid Equipment Data Acquisition System(HEDAS) for Equipment Engineering System(EES) Framework (EES 프레임워크를 위한 하이브리드 생산설비 데이터 습득 시스템(HEDAS)의 설계 및 구현)

  • Kim, Gyoung-Bae
    • Journal of the Korea Society of Computer and Information
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    • v.17 no.2
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    • pp.167-176
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    • 2012
  • In this paper we design and implement a new Hybrid Equipment Data Acquisition System (HEDAS) for data collection of semiconductor and optoelectronic manufacturing equipments in the equipment engineering system(EES) framework. The amount of the data collected from equipments have increased rapidly in equipment engineering system. The proposed HEDAS efficiently handles a large amount of real-time equipment data generated from EES framework. It also can support the real-time ESS applications as well as non real-time ESS applications. For the real-time EES applications, it performs high-speed real-time processing that uses continuous query and filtering techniques based on memory buffers. The HEDAS can optionally store non real-time equipment data using a HEDAS-based database or a traditional DBMS-based database. In particular, The proposed HEDAS offers the compression indexing based on the timestamp of data and query processing technique saving the cost of disks storage against extremely increasing equipment data. The HEDAS is efficient system to collect huge real-time and non real-time equipment data and transmit the collected equipment data to several EES applications in EES framework.