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      Magnetic Resonance Imaging Assessment of Fatigue Injury during Exercise

      research-article
      Author(s): 1 , 2 , 3 , 4 , 5 ,
      Publication date (Electronic):
      Journal: Scanning
      Publisher: Hindawi

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          Abstract

          In order to investigate the changes of temporal function metabolism of lumbar and back muscles after exercise, a magnetic resonance imaging- (MRI-) based assessment of fatigue injury during exercise was proposed. A total of 100 healthy adult volunteers were selected, including 48 males and 52 females, aged from 19 to 30 years, with an average age of 24.8 + 2.3 years. They were divided into four groups according to the different time points of 0, 15, 30, and 45 minutes after exercise, with 25 persons in each group. PHILIPS Achieva 3.0 T Tx MRI scanner was used to perform BOLD and T2-mapping before and after exercise in four groups of healthy volunteers. All data were analyzed by statistical software. The results showed that the total CSA of the dorsi extensor muscle group and the CSA value of the dorsi extensor muscle group at different levels at different time points before and after exercise increased slowly in exercise period and decreased rapidly in recovery period. It was verified that BOLD MRI and T2-mapping imaging can indirectly evaluate the trend of CSA water metabolism and blood oxygen level in healthy adults after exercise.

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          Relay vibration protection simulation experimental platform based on signal reconstruction of MATLAB software

          Qian Zhang (2021)
          For conceptual analysis of the principle of relay vibration protection, this article establishes the simulation system model of directional current protection in MATLAB/Simulink environment through the protection algorithm. Various outcomes have been achieved for the proposed approach during the faulty conditions. The outcomes obtained during the fault period reveals that the waveform of three-phase current changes greatly, and the amplitude of three-phase current at power supply side increases sharply. After 0.02s signal acquisition and processing, the action signal acts after 0.07s, and the fault is removed. In case of two-phase short-circuit, two-phase grounding short-circuit and other faults, the fault can be removed smoothly after signal acquisition and processing. In this paper, the directional current protection simulation system based on microcomputer protection model is built, and the changes of voltage, current and action signal are demonstrated through GUI interface, and analyzed and verified.
          Article 0 comments Cited 31 times – based on 0 reviews     Review now
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            Network modelling and computation of quickest path for service-level agreements using bi-objective optimization

            Ashutosh Sharma, Rajiv Kumar, Manar Talib … (2019)
            This article addresses the problem related to the reliability of path after transmitting the given amount of data with the service-level agreement cooperation in the computer communication network. The links have associated with service performance factor parameter during the data transmission, and each node is associated with the requested service performance factor. In this article, first we have considered the single objective to minimize the transmission time of the quickest path problem. An algorithm for quickest path problem has been proposed for results, and furthermore, its time complexity has been shown. The problem has been extended with bi-objective optimization of the quickest path problem, which minimizes the transmission time and hybrid logarithmic reliability. An algorithm is proposed for getting the number of efficient solutions for the quickest path problem using label-correcting algorithm. The algorithms are implemented and tested on different standard benchmark network problems provided with the set of Pareto front of the results.
            Article 0 comments Cited 29 times – based on 0 reviews     Review now
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              Framework for a smart adult education environment

              R Huang, R. HUANG (2015)
              Article 0 comments Cited 24 times – based on 0 reviews     Review now
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                Author and article information

                Contributors
                Lei Zhang:
                ORCID: https://orcid.org/0000-0001-6929-1967
                Journal
                Journal ID (nlm-ta): Scanning
                Journal ID (iso-abbrev): Scanning
                Journal ID (publisher-id): SCANNING
                Title: Scanning
                Publisher: Hindawi
                ISSN (Print): 0161-0457
                ISSN (Electronic): 1932-8745
                Publication date Collection: 2022
                Publication date (Electronic): 16 June 2022
                Volume: 2022
                Electronic Location Identifier: 9971966
                Affiliations
                1School of Sport Economics and Management, Tianjin University of Sport, Tianjin 301617, China
                2School of Sport, Daqing Normal University, Daqing, Heilongjiang 163712, China
                3Daqing Oilfield General Hospital, Daqing, Heilongjiang 163700, China
                4Section of Recruitment and Employment, Harbin Sport University, Harbin, Heilongjiang 150008, China
                5Department of Physical Education, Heilongjiang Institute of Technology, Harbin, Heilongjiang 150050, China
                Author notes

                Academic Editor: Balakrishnan Nagaraj

                Author information
                https://orcid.org/0000-0003-3923-0623
                https://orcid.org/0000-0002-9106-7483
                https://orcid.org/0000-0002-6492-0848
                https://orcid.org/0000-0001-6929-1967
                Article
                DOI: 10.1155/2022/9971966
                PMC ID: 9225872
                PubMed ID: 35822161
                SO-VID: 0f0e570c-c80d-4a56-9dc2-d15d019a4c8b
                Copyright © Copyright © 2022 Zhengguo Ai et al.
                License:

                This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                Date received : 15 May 2022
                Date revision received : 28 May 2022
                Date accepted : 6 June 2022
                Categories
                Subject: Research Article

                Data availability:

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