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  1. 7421
  2. 7422

    (RE) FAZENDO A MATÉRIA: projeto e seleção* by Matthew Kearnes

    Published 2014-04-01
    “…Essa visão da manufatura em escala atômica – ‘de baixo-para-cima’ – quando associada a possibilidades radicais e especulativas da ‘máquina molecular’, tem se tornado uma abordagem predominante na fabricação de nanoestruturas ‘por projeto’. …”
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  3. 7423
  4. 7424
  5. 7425

    Monthly Water Level Prediction Based on ESMD-VMD-ESN Hybrid Model by LI Ang, ZHANG Kun, SANG Yuting, BI Wan

    Published 2022-01-01
    “…Water level sequence contain complex features of multiple frequency information.To improve the prediction accuracy of the water level sequences,a combined model was developed based on Extreme-point Symmetric Mode Decomposition (ESMD),Variational Mode Decomposition (VMD) and Echo State Network (ESN),namely ESMD-VMD-ESN.And it was applied to forecast water level of the Taipuzha station in the upper reaches of Taipu River.The predictive effect of the “first decomposition-second decomposition-prediction-reconstruction” model was explored by comparing it with a single model ESN and the combination model ESMD-ESN.The results show that ESMD-VMD-ESN has the highest accuracy,followed by ESMD-ESN,and the lowest ESN accuracy.Compared with the ESN,the Willmott's Index of Agreement (WIA) and Pearson Correlation Coefficient (PCC) of ESMD-ESN respectively increased by 51% and 11%,the Mean Absolute Error (MAE) and Root Mean Squard Error (RMSE) of ESMD-ESN respectively decreased by 14% and 45%.ESMD can effectively simplify the water level sequence and reduce the prediction error.Compared with the ESMD-ESN,the WIA and PCC of ESMD-VMD-ESN respectively increased by 5% and 10%,the MAE and RMSE of ESMD-ESN respectively decreased by 52% and 50%.VMD can further simplify the highest frequency component of ESMD and improving the model prediction accuracy.In conclusion,the combined model ESMD-VMD-ESN has well applicability and stability in the monthly water level prediction.…”
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  6. 7426

    A Novel Excavation and Construction Method for an Extra-Long Underwater Tunnel in Soft Soils by Jian Wu, Zhifang Zhou, Wenjun Xia, Haixiao Wang, Zhongqiang Fang

    Published 2021-01-01
    “…In this paper, a novel excavation and construction method is presented for the Taihu tunnel, which is the longest lake-crossing tunnel in China. …”
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  7. 7427
  8. 7428

    O repensar social sem paliativos: retratos da marginalização em discussões de sala de aula by Sheila Pires dos Santos, Marcelo Franco Leão

    Published 2024-12-01
    “…Com a análise dos dados a partir da triangulação com foco no metafenômeno, transcorreu-se este estudo objetivando reflexões para a desconstrução da linearidade entre o ensino de Ciências e a formação para a cidadania, ao pluralizar a sociedade e enfatizar a formação de valores e atitudes cívicas, especialmente em contextos de comunidades de baixa renda. Evidencia-se a urgência em formações continuadas para professores que abordem a ética em contextos político-sociais, além de explicitar a deficiência das políticas públicas e a inserção do ‘estado paralelo’ em comunidades de baixa renda. …”
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  9. 7429

    Inteligência Artificial em Contextos Restritos de Recursos by Osmundo Rocha Claudino, Diego Dermeval, Luiz Rodrigues

    Published 2024-12-01
    “…Assim, este artigo de revisão focaliza implicações do uso da IA no ensino de Ciências, considerando os problemas da baixa proficiência científica e da baixa conectividade, que marcam o contexto educacional brasileiro. …”
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  10. 7430
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  12. 7432

    Africa at a turning point? : growth, aid, and external shocks /

    Published 2008
    Table of Contents:
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  13. 7433
  14. 7434
  15. 7435

    البحث المرئي (Visual Search) تقنية لاسترجاع المعلومات على شبکة الإنترنت: دراسة في آليات البحث والاسترجاع داخل محرکات البحث... by عمرو سعید فهیم

    Published 2023-01-01
    “…وخلصت الدراسة إلى توافر إجمالي معايير (البحث والاسترجاع) بنسبة 68,75% في محرک البحث Bing Visual Search؛ يليه في ذلک کل من محرک البحث Google Image و Yandex بنسبة 65,62%، ثم محرک البحث TinEye بنسبة 59,37%، وأخيرًا محرک البحث Baidu بنسبة 53,12%. وتوصى الدراسة بإجراء مزيد من الدراسات الأکاديمية التي تعالج موضوع البحث المرئي، ومدى إمکانية تصميم، وإنشاء، وتطبيق محرکات بحث عربية لاسترجاع المعلومات المرئية الثابتة على شبکة الإنترنت؛ حيث يُعدَّ هذا المجال من المجالات الحديثة، والخصبة التي لم يتم التطرق إليها.…”
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  16. 7436

    Aplicação da Lei de Stokes: um experimento didático em Fenômenos de Transporte by Antonio Marcos de Oliveira Siqueira, Abderrahmane Khechekhouche, Júlio Cesar Costa Campos, Gabriel Siqueira Silva, Marlons Lino da Cruz

    Published 2022-04-01
    “…O trabalho descreve um experimento com fins acadêmicos para a determinação da massa específica e da viscosidade dinâmica de um fluido por meio do Método de Stokes, um procedimento experimental simples e de baixo custo e que possibilita o processo de ensino/aprendizagem de conceitos diversos da área de Mecânica dos Fluidos, aplicada ao campo da Engenharia. …”
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  17. 7437

    ANÁLISE DO MODELO FUNCIONAL - LUMINÁRIA LED: AVALIAÇÃO HEURÍSTICA E FOCUS GRUPO by Yago Weschenfelder Rodrigues, Maria Lucia Leite Ribeiro Okimoto, Erick Lastra, Caio M. da Silva

    Published 2018-01-01
    “…Na segunda fase aplica-se o focus group com 12 usuários de baixa renda, dividido em dois grupos. Um piloto com 4 usuários (feminino) e um grupo final com 8 usuários (masculino). …”
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  18. 7438
  19. 7439
  20. 7440

    Phenotypic Plasticity in Gut Length in the Planktivorous Filter-Feeding Silver Carp (Hypophthalmichthys molitrix) by Zhixin Ke, Xie Ping, Longgen Guo

    Published 2008-01-01
    “…In the present study, we studied the gut length plasticity of planktivorous filter-feeding silver carp under different food resources in large-net cage experiments in Meiliang Bay of Lake Taihu in 2004 and 2005. There was a significant difference in stocking density between these 2 years. …”
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