1. Editorial Expression of Concern to various articles

   Editorial Expression of Concern 28 September 2021 Pages: 1 - 1

2. RETRACTED ARTICLE: The application of twin network target tracking and support tensor machine in the evaluation of orienteering teaching

   • Shenrong Wei

   Original Article 20 August 2021 Pages: 3 - 3

3. RETRACTED ARTICLE: Real-time voice system in local area network based on cloud computing background and service management of online education colleges

   • Ke Su
   • Chae-Kwan Lim

   Original Article 11 August 2021 Pages: 5 - 5

4. RETRACTED ARTICLE: Application of embedded network system and distributed database in children’s psychological education

   • Linheng Song

   Original Article 11 August 2021 Pages: 7 - 7

5. RETRACTED ARTICLE: Vocational education reform based on improved convolutional neural network and speech recognition

   • Rui Yang

   Original Article 11 August 2021 Pages: 9 - 9

6. RETRACTED ARTICLE: Digital forensics system based on dynamic path prediction and the competitiveness of cross-border e-commerce SMEs

   • Chunqiong Wu
   • Bingwen Yan
   • Na Chen

   Original Article 11 August 2021 Pages: 11 - 11

7. RETRACTED ARTICLE: Distinguish between the data of the Internet of Things based on abnormal audio detection and the image of athletes’ human actions

   • Yinkun Li
   • Anzhi Wang

   Original Article 11 August 2021 Pages: 13 - 13

8. RETRACTED ARTICLE: The conversion of traditional arts and crafts to modern art design under the background of 5G mobile communication network

   • Linlin Niu

   Original Article 16 August 2021 Pages: 15 - 15

9. RETRACTED ARTICLE: MapReduce-oriented 5G network and information visualization design

   • Rui Zhao

   Original Article 11 August 2021 Pages: 17 - 17

10. RETRACTED ARTICLE: Edge computing and financial service industry financing risk innovation based on data mining technology

    • Qiaoping Zhou
    • Mengze Zhang
    • Bae Ki-Hyung

    Original Article 11 August 2021 Pages: 19 - 19

11. RETRACTED ARTICLE: Application of heterogeneous execution body scheduling and VR technology for mimic cloud services in urban landscape design

    • Liyuan Zhao

    Original Article 20 August 2021 Pages: 21 - 21

12. RETRACTED ARTICLE: High-performance computing system and artificial language recognition in the visual application of intangible cultural heritage art design

    • Xiaodan Peng

    Original Article 11 August 2021 Pages: 23 - 23

13. RETRACTED ARTICLE: Big data VR system oriented to cloud services in Spanish cultural video simulation application

    • Ao Wang

    Original Article 11 August 2021 Pages: 25 - 25

14. RETRACTED ARTICLE: Research on characteristics of paper-plastic composite film based on intelligent optimization algorithm

    • Wenjun Jiang
    • Ning Zhang

    Original Article 16 August 2021 Pages: 27 - 27

15. RETRACTED ARTICLE: Multimedia digital art design based on double-buffer cooperation and distributed index

    • Chong Lan

    Original Article 10 August 2021 Pages: 29 - 29

16. RETRACTED ARTICLE: High-performance cloud computing–oriented corpus and English teaching speech abnormal classification

    • Zhao Yang

    Original Article 11 August 2021 Pages: 31 - 31

17. RETRACTED ARTICLE: Data encryption system for 5G cloud storage and big data fitness energy metabolism detection

    • Ye Zhao

    Original Article 13 August 2021 Pages: 33 - 33

18. RETRACTED ARTICLE: IoT perception and public transportation network optimization based on big data algorithms

    • Xin Dai
    • Tianshan Ma

    Original Article 16 August 2021 Pages: 35 - 35

19. RETRACTED ARTICLE: Research on multi-objective optimal image recognition and aerobics teaching system based on footprint image

    • Shuanghui Song
    • Liangcai Yao

    Original Article 16 August 2021 Pages: 37 - 37

20. RETRACTED ARTICLE: Application of hardware system of temporal big data in enterprise human resource management in distributed environment

    • Liping Lou

    Original Article 16 August 2021 Pages: 39 - 39

21. RETRACTED ARTICLE: Application of big data platform and embedded intelligent system in teaching assistant work of Jinke resources

    • Yicai Shen
    • Le Niu
    • Le Shen

    Original Article 18 August 2021 Pages: 41 - 41

22. RETRACTED ARTICLE: Big data-based twin network target tracking and local regional economic development

    • Jianfang Yue

    Original Article 19 August 2021 Pages: 43 - 43

23. RETRACTED ARTICLE: Data measurement and aerobics online teaching based on SAR target detection network

    • Xianfang Zhang

    Original Article 16 August 2021 Pages: 45 - 45

24. RETRACTED ARTICLE: Application of deep and robust resource allocation for uncertain CSI in English distance teaching

    • Li Junsheng

    Original Article 17 August 2021 Pages: 47 - 47