• Title/Summary/Keyword: Network equipment

Search Result 1,257, Processing Time 0.029 seconds

A Comparative Study of the Technical Characteristics of Variable-Gauge Systems (해외 궤간가변 시스템의 기술적 특성 비교 연구)

  • Na Hui Seung;Jang Seung-Ho;Han Jun-Seok
    • Proceedings of the KSR Conference
    • /
    • 2004.06a
    • /
    • pp.645-651
    • /
    • 2004
  • For the connection of trans-continental railway network, it is critical to conquer the break-of-gauge problem at the borders in different countries. Up to now, the best solution seems to be the employ of the auto-changable gauge equipment. Countries, such as Russia, Japan are developing and commercializing auto-changable gauge equipment to maximize transport efficiency for the trans-continental network. The efforts to search a suitable logistical service are also underway. In this paper, technology and development trend of this equipment in several countries is indicated through inspecting and analyzing the historical and current situation of development, operating mechanism and technical problems. As the basic technology of auto-changeable gauge is not well developed in our country, the purpose of this study is to search an approach to fix the research direction, and find practical ways to international cooperation.

  • PDF

An Effect of Equipment-Loading on the Buckling Characteristics of Single-Layer Latticed Domes (단층 래티스돔의 좌굴특성에 관한 설비하중의 영향)

  • Jung, Hwan-Mok
    • Journal of Korean Society of Steel Construction
    • /
    • v.9 no.3 s.32
    • /
    • pp.323-332
    • /
    • 1997
  • This study is aimed at investigating the buckling characteristics of single layer latticed domes with triangular network pattern under the partially concentrated equipment loading in the cases of both having a geometrical imperfection and not having.

  • PDF

Auto/Cross-Correlated Time Series Modeling of Plasma Equipment Sensor Information (플라즈마 장비 센서정보의 Auto/Cross-Correlated 시계열 모델링)

  • Kim, Ki-Tae;Kim, Byung-Whan
    • Proceedings of the KIEE Conference
    • /
    • 2006.04a
    • /
    • pp.99-101
    • /
    • 2006
  • Auto-Cross Correlated time series (ACTS) model was constructed by using the backpropagation neural network. The performance of ACTS model was evaluated with sensor information collected from a large volume, industrial plasma-enhanced chemical vapor deposition system. A total of 18 sensor information were collected. The effect of inclusion of past and future information were examined. For all but three sensor information with a large data variance demonstrated a prediction error less than 3%. By integrating ACTS model into equipment software, process quality can be more stringently monitored while improving device throughput.

  • PDF

Design of DNP Controller for Robust Control of Auto-Equipment Systems (자동화 설비시스템의 강인제어를 위한 DNP 제어기 설계)

  • ;趙賢燮
    • The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.13 no.2
    • /
    • pp.187-187
    • /
    • 1999
  • in order to perform a elaborate task like as assembly, manufacturing and so forth of components, tracking control on the trajectory of power coming in contact with a target as well as tracking control on the movement course trajectory of end-effector is indispensable. In this paper, to bring under robust and accurate control of auto-equipment systems which disturbance, parameter alteration of system, uncertainty and so forth exist, neural network controller called dynamic neural processor(DNP) is designed. Also, the learning architecture to compute inverse kinematic coordinates transformations in the manipulator of auto-equipment system is developed and the example that DNP can be used is explained. The architecture and learning algorithm of the proposed dynamic neural network, the DNP, are described and computer simulation are provided to demonstrate the effectiveness of the proposed learning method using the DNP.

Method And Mathematical Algorithm For Finding The Quasi-Optimal Purpose Plan

  • Piskunov, Stanislav;Yuriy, Rayisa;Shabelnyk, Tetiana;Kozyr, Anton;Bashynskyi, Kyrylo;Kovalev, Leonid;Piskunov, Mykola
    • International Journal of Computer Science & Network Security
    • /
    • v.21 no.2
    • /
    • pp.88-92
    • /
    • 2021
  • A method and a mathematical algorithm for finding a quasi-optimal assignment plan with rectangular efficiency matrices are proposed. The developed algorithm can significantly reduce the time and computer memory consumption for its implementation in comparison with optimal methods.

Use of unmanned aerial systems for communication and air mobility in Arctic region

  • Gennady V., Chechin;Valentin E., Kolesnichenko;Anton I., Selin
    • Advances in aircraft and spacecraft science
    • /
    • v.9 no.6
    • /
    • pp.525-536
    • /
    • 2022
  • The current state of telecommunications infrastructure in the Arctic does not allow providing a wide range of required services for people, businesses and other categories, which necessitates the use of non-traditional approaches to its organization. The paper proposes an innovative approach to building a combined communication network based on tethered high-altitude platform station (HAPS) located at an altitude of 1-7 km and connected via radio channels with terrestrial and satellite communication networks. Network configuration and composition of telecommunication equipment placed on HAPS and located on the terrestrial and satellite segment of the network was justified. The availability of modern equipment and the distributed structure of such an integrated network will allow, unlike existing networks (Iridium, Gonets, etc.), to organize personal mobile communications, data transmission and broadband Internet up to 100 Mbps access for mobile and fixed subscribers, rapid transmission of information from Internet of Things (IoT) sensors and unmanned aerial vehicles (UAV). A substantiation of the possibility of achieving high network capacity in various paths is presented: inter-platform radio links, subscriber radio links, HAPS feeder lines - terrestrial network gateway, HAPS radio links - satellite retransmitter (SR), etc. The economic efficiency of the proposed solution is assessed.

Fatten Analysis of Trouble Signal on DS for GIS using Neural Network (신경회로망을 이용한 GIS용 단로기의 이상신호 패턴분석)

  • 김종서;이은석;천종철
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.16 no.12S
    • /
    • pp.1310-1315
    • /
    • 2003
  • GIS(Gas Insulated Switchgear) is power equipment with excellent dielectric strength and is economy merit in high confidence and stability. But, because of structural characteristics, this is difficult to monitor externally and provide much loss in the event of an accident. Recently, because equipment of GIS is occurring problem of confidence used for a long time, development of diagnosis technique have been importantly recognized. therefore, measurement and analysis of PD much has been generally used for equipment of GIS. But, in case of measurement of PD at field, real trouble signals is difficult to classify noise. Accordingly, a variety of trouble conditions for DS are simulated, and detected signals are analyzed by the application of electrical and mechanical methods. For this analysis, detected signals are accumulated according to phase-magnitude with the application of induction sensor, and then we analyzed the characteristics. For the simulation experiment, we make DS for 170KV GIS and analyze the characteristics of detected signals with the application of neural network algorithm. last, we have measured DS for GIS at field, and then have analyzed detected signals.

A Study on a Method for Detecting Leak Holes in Respirators Using IoT Sensors

  • Woochang Shin
    • International journal of advanced smart convergence
    • /
    • v.12 no.4
    • /
    • pp.378-385
    • /
    • 2023
  • The importance of wearing respiratory protective equipment has been highlighted even more during the COVID-19 pandemic. Even if the suitability of respiratory protection has been confirmed through testing in a laboratory environment, there remains the potential for leakage points in the respirators due to improper application by the wearer, damage to the equipment, or sudden movements in real working conditions. In this paper, we propose a method to detect the occurrence of leak holes by measuring the pressure changes inside the mask according to the wearer's breathing activity by attaching an IoT sensor to a full-face respirator. We designed 9 experimental scenarios by adjusting the degree of leak holes of the respirator and the breathing cycle time, and acquired respiratory data for the wearer of the respirator accordingly. Additionally, we analyzed the respiratory data to identify the duration and pressure change range for each breath, utilizing this data to train a neural network model for detecting leak holes in the respirator. The experimental results applying the developed neural network model showed a sensitivity of 100%, specificity of 94.29%, and accuracy of 97.53%. We conclude that the effective detection of leak holes can be achieved by incorporating affordable, small-sized IoT sensors into respiratory protective equipment.

A Study Education Model on the Software Defined Network Control System in the Transport Network (전송망의 소프트웨어 정의 네트워크 제어 시스템 교육 모델 연구)

  • Chang, Moon-soo;Kim, Yu-doo
    • Journal of Practical Engineering Education
    • /
    • v.10 no.2
    • /
    • pp.81-87
    • /
    • 2018
  • During the major sections of the network, Software-defined network control technology for the network area corresponding to the transmission network is becoming a change in network-controlled environments utilizing network operation and provisioning across the network industry. Currently development is underway along with the deployment of PTN equipment and configuration for provisioning is being phased out. It is actively introducing establishment of SDN-based control system while constructing provisioning of PTN equipment from actual commercial network. Therefore, in this thesis, we are going to look at the contents and trends of SDN systems in packet-based transmission networks based on PTN and use them in research on OpenDaylight, an open source for configuring SDN. It then Network Operator will study the software defined control techniques for operational education.

A Development of Methodology for NOVEC Gas Fire Extinguishing System (NOVEC 가스 소화 설비 설계방법론 개발)

  • Yun, Jeong-In;Choi, Jae-Hyuk
    • Journal of Advanced Marine Engineering and Technology
    • /
    • v.39 no.3
    • /
    • pp.206-210
    • /
    • 2015
  • The most important thing for NOVEC gas fire extinguishing equipment is to release NOVEC gas, which contained in the extinguishing container, to the safety section by the time appointed. For this matter, it is significant to decide arrangement and size of the proper piping equipment. This study has developed the design methodology of NOVEC gas fire extinguishing equipment in use of pipe network analysis techniques. Based on the design methodology, each design coefficient is chosen. It is found that the calculated result, which is 6.498 seconds, has been counted within the 10 seconds limit, which is fairly satisfied with extinguishing releasing time based on the developed methodology. At that time, the pressure loss is 21.09bar.