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  1. Article ; Online: Tofu Is Not Cheese

    Yong Zhao

    ECNU Review of Education, Vol

    Rethinking Education Amid the COVID-19 Pandemic

    2020  Volume 3

    Keywords Theory and practice of education ; LB5-3640 ; covid19
    Language English
    Publishing date 2020-06-01T00:00:00Z
    Publisher SAGE Publishing
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Learning‐based containment control in the absence of leaders' information

    Yong Zhao / Hanning Fan / Sihai Guan

    Engineering Reports, Vol 6, Iss 1, Pp n/a-n/a (2024)

    2024  

    Abstract: Abstract This article considers the containment control problem of continuous‐time dynamic agents without leaders' state information. The leaders have first‐ and second‐order dynamics, respectively, while first‐order dynamics always govern the followers. ...

    Abstract Abstract This article considers the containment control problem of continuous‐time dynamic agents without leaders' state information. The leaders have first‐ and second‐order dynamics, respectively, while first‐order dynamics always govern the followers. Each agent has inherent nonlinear dynamics and can only measure the output information of its neighbors. The output of each leader is expressed as the product of an unknown coefficient and a position‐like state, while the output of each follower is equal to its position‐like state. To stabilize the position‐like states of the followers to the convex hull spanned by leaders, the unknown coefficients are asymptotically tracked by leveraging reinforcement learning based on the inherent dynamics and the output information. Two distributed learning‐based containment protocols are proposed, respectively. It is proved that if the directed communication topology has a spanning forest and certain conditions in terms of the inherent nonlinear dynamics are satisfied, then the proposed controllers with proper control gains solve the containment control problem asymptotically under arbitrary initial states. An exciting conclusion is that the learning algorithms' convergence rate plays an important role in achieving containment control. Numerical simulations are performed to validate the effectiveness of the obtained theoretical results.
    Keywords containment control ; distributed control ; learning‐based control ; multi‐agent systems ; output feedback ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Electronic computers. Computer science ; QA75.5-76.95
    Subject code 629
    Language English
    Publishing date 2024-01-01T00:00:00Z
    Publisher Wiley
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Failure Process of High-Loess-Filled-Slopes (HLFSs) during Precipitation under Different Mitigation Measures

    Yi Zhu / Jianqi Zhuang / Yong Zhao

    Applied Sciences, Vol 14, Iss 1, p

    2024  Volume 419

    Abstract: The problems of gully and soil erosion caused by large-scale urban construction and agricultural development in China have become more and more serious in recent years. In an effort to solve this problem, a series of gully stabilization and highland ... ...

    Abstract The problems of gully and soil erosion caused by large-scale urban construction and agricultural development in China have become more and more serious in recent years. In an effort to solve this problem, a series of gully stabilization and highland protection projects have been carried out on the Loess Plateau, and this has resulted in a large number of high-loess-filled-slopes (HLFSs). Although these filled slopes uses several different mitigation measures, the HLFSs have been eroded and destroyed under the action of water. In order to study the influence of different mitigation measures on the stability of HLFSs and their failure process, this paper uses a flume test of the effects of various mitigation measures on this failure process. The results show that: (1) the failure processes of slopes with different mitigation measures are obviously different. Slope deformation u with a declining gradient mitigation mainly occurs on the surface of the slope body, and although slope erosion is quite serious, the slope does not fail as a whole. Slopes with a stepwise drainage channel mitigation show little erosion, but material can easily slide along the horizontal drainage channels. (2) The slope deformation process is correlated with changes in pore-water pressure. When local instability occurs, there is always a pre-process of continuously rising pore-water pressure. When a failure occurs, the pore-water pressure of the soil at each position of the slope body suddenly fluctuates under instantaneous excitation. (3) The response of soil pore pressure and the development characteristics of tension cracks affect the deformation of the slopes, which is also the cause of the differences slope instability caused by different mitigation measures. These research results provide reference for the protection of HLFS engineering projects from heavy rains.
    Keywords loess ; high filled slope ; failure process ; mitigation measures ; experimental ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
    Subject code 710
    Language English
    Publishing date 2024-01-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Computer-Aided Optimization of Manifold Design To Improve Turbocharging of Diesel Engines

    Yong Zhao

    ASEAN Journal on Science and Technology for Development, Vol 10, Iss 2, Pp 151-

    2018  Volume 172

    Keywords Technology (General) ; T1-995 ; Science (General) ; Q1-390
    Language English
    Publishing date 2018-07-01T00:00:00Z
    Publisher Universitas Gadjah Mada
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: A study on the content of integrity policies and research integrity management in Chinese universities

    Yuan Cao / Yuwei Jiang / Yong Zhao

    Frontiers in Research Metrics and Analytics, Vol

    2023  Volume 8

    Abstract: BackgroundThis study outlines a comprehensive analysis of the primary characteristics of managing research integrity (RI) in domestic colleges and universities in China. RI education in China consists primarily of soft advocacy, with no hard requirements ...

    Abstract BackgroundThis study outlines a comprehensive analysis of the primary characteristics of managing research integrity (RI) in domestic colleges and universities in China. RI education in China consists primarily of soft advocacy, with no hard requirements or continuous and systematic support. Together with other stakeholders, such as funders and publishers, higher education institutions (e.g., colleges and universities) are one of the vital actors that have a lot of influence on RI promotion and implementation among researchers. However, the literature on the regulation of RI policies in China's universities is limited.MethodsWe investigate the top 50 colleges and universities in the 2021 Best Chinese Universities Ranking. Their guidance and policy documents on RI were collected via their official websites. By integrating the use of scientometrics analysis, including descriptive statistical analysis, inductive content analysis, and quantitative analysis, we examine whether and how these higher education institutions respond to national policies in a timely manner, especially in terms of their frequency of updates, topic clustering analysis, terms clustering analysis, content aggregation. To further understand the composition mechanism and the main working systems of university RI management organizations, we conducted in-depth research on the organizational functions, meeting system, staff composition mechanism, and scientific research misconduct acceptance and investigation mechanisms.ResultsThe regulations on the treatment of RI in China's universities have, in response to the government's call to establish their own management policies and working mechanisms, maintained a zero-tolerance stance on research misconduct. The sampled universities listed the definition and principles of misconduct practices, investigation procedures, and sanctions of research misconduct in their own policy documents. Some of them listed inappropriate research practices All 50 sampled universities have formed relevant organizations ...
    Keywords quantitative study ; research integrity ; academic misconduct policy ; Chinese university ; rules and regulations ; Bibliography. Library science. Information resources ; Z
    Subject code 001
    Language English
    Publishing date 2023-02-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Application of low dose aspirin in pre-eclampsia

    Yu Ren / Yong Zhao / Xiangdong Yang / Chaojun Shen / Hua Luo

    Frontiers in Medicine, Vol

    2023  Volume 10

    Abstract: Aspirin is widely used in the primary and secondary prevention of cardiovascular and cerebrovascular diseases. Low-dose aspirin is also widely used to prevent pre-eclampsia and fetal growth retardation in utero. However, the use of aspirin during ... ...

    Abstract Aspirin is widely used in the primary and secondary prevention of cardiovascular and cerebrovascular diseases. Low-dose aspirin is also widely used to prevent pre-eclampsia and fetal growth retardation in utero. However, the use of aspirin during pregnancy is controversial. Since 1985, when aspirin was reported to be effective in obstetrics, numerous studies have attempted to determine the effect of low-dose aspirin on the morbidity of pre-eclampsia but have remained inconclusive. Guidelines for aspirin in preventing pre-eclampsia are different in different countries and regions. This article summarizes the research progress, mechanism, and application prospect of aspirin in preventing pre-eclampsia, providing a theoretical basis for the rational use of aspirin in pregnancy.
    Keywords aspirin ; pre-eclampsia ; low-dose ; cerebrovascular disease ; guideline ; Medicine (General) ; R5-920
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: New green development indicator of water resources system based on an improved water resources ecological footprint and its application

    Yafeng Yang / Hongrui Wang / Yiyang Li / Li Zhang / Yong Zhao

    Ecological Indicators, Vol 148, Iss , Pp 110115- (2023)

    2023  

    Abstract: The assessment of green development of water resources system is critical for the formulation of high-quality development policies of regional economy and society. Despite the water resources ecological footprint (WEF) model has been proved to be an ... ...

    Abstract The assessment of green development of water resources system is critical for the formulation of high-quality development policies of regional economy and society. Despite the water resources ecological footprint (WEF) model has been proved to be an effective measure in evaluating the sustainable utilization of water resources, there is still lacking a well-established method to weigh the green development of water resources system concerning the economic and social development. In this study, the parameters of the traditional WEF model were calibrated and optimized, and an extended WEF model, which suit for different regions, was constructed; Further, based on WEF, the water resources ecological benefit ratio (WEBR) was proposed, which depict the relationship between the sustainability of water resources and social economy. The integrated framework coupling the above methods had been verified in Beijing-Tianjin-Hebei (BTH) region of China. The results demonstrated that: (1) From 2010 to 2020, the WEF in BTH region all exceeded the water resources ecological carrying capacity (WEC), showing varying degrees of overload in water resources utilization. Water resources ecological pressure index (WEPI) is relatively high, and there is no significant improvement. (2) The slope of BTH's WEBR is weakening, and shows spatial heterogeneity. (3) The coordinated development of WEPI and WEBR is stable, and most cities are within the L-L cluster. This study can provide support for decision-makers and promote the green and high-quality development of region water resources system and economic society.
    Keywords Green development ; Water resources system ; Water resources ecological footprint ; Water resources ecological benefit ratio ; Beijing-Tianjin-Hebei region ; Ecology ; QH540-549.5
    Subject code 910
    Language English
    Publishing date 2023-04-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: COS Attenuates AFB 1 -Induced Liver Injury in Medaka through Inhibition of Histopathological Damage and Oxidative Stress

    Huijun Shi / Lin Chen / Zhaohuan Zhang / Yong Zhao / Jie Ou

    Sustainability, Vol 15, Iss 5418, p

    2023  Volume 5418

    Abstract: Aflatoxin B1 (AFB 1 ) –induced liver damage may be treated with chitosan oligosaccharide (COS), a small-molecular–weight oligosaccharide with excellent bioactivity and antioxidant potential. Hepatotoxicity induced by AFB 1 single acute exposure (ASAE) ... ...

    Abstract Aflatoxin B1 (AFB 1 ) –induced liver damage may be treated with chitosan oligosaccharide (COS), a small-molecular–weight oligosaccharide with excellent bioactivity and antioxidant potential. Hepatotoxicity induced by AFB 1 single acute exposure (ASAE) has been theoretically established but the mechanism of toxicity in aquatic models has been less studied. In this paper, a model of liver injury in Japanese medaka ( Oryzias latipes ) after ASAE for 72 h and a model of liver injury healing after ASAE following a COS intervention for 72 h were developed. The different effects of ASAE and COS interventions for ASAE were analyzed at the phenotypic and genetic levels. The results showed that AFB 1 reduced body weight and hepatopancreatic somatic indices (HSI) in medaka. Moreover, AFB 1 –induced histopathological damage and oxidative stress injury were concentration–dependent but the symptoms of damage were attenuated to some extent by the addition of the intervention drug COS, and the intervention effect of high concentrations of COS was almost identical to silymarin (SIL). Using the RNA–Seq technique, COS reduces the number of differentially expressed genes (DEGs) brought about by AFB 1 . Among the genes associated with tumors, hepatocellular carcinoma and hepatitis aurka , thbs1 , serpine1 , fabp7 , and dusp5 were also validated by Q-PCR with corresponding trends. In conclusion, AFB 1 can cause liver injury in medaka and COS has a therapeutic effect, and these impacted genes have the potential to become therapeutic targets for COS intervention in AFB 1 –induced liver disease.
    Keywords aflatoxin B1 ; chitosan oligosaccharide ; oxidative stress ; histopathological ; differentially expressed genes ; Environmental effects of industries and plants ; TD194-195 ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
    Subject code 610
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: A TDV attention-based BiGRU network for AIS-based vessel trajectory prediction

    Jin Chen / Jixin Zhang / Hao Chen / Yong Zhao / Hongdong Wang

    iScience, Vol 26, Iss 4, Pp 106383- (2023)

    2023  

    Abstract: Summary: Automatic identification system (AIS) is a vessel-based system for the automatic broadcast and reception of vessel information, and it also supports data for trajectory prediction. Since the vessel’s sailing route is flexible and changeable and ... ...

    Abstract Summary: Automatic identification system (AIS) is a vessel-based system for the automatic broadcast and reception of vessel information, and it also supports data for trajectory prediction. Since the vessel’s sailing route is flexible and changeable and the AIS broadcast is unconfirmed, the trajectory varies greatly and the original AIS data contains some noisy trajectory, which leads to low prediction accuracy and stability. Therefore, to solve the above problem, this paper proposes a trajectory prediction method based on bidirectional gate recurrent unit (BiGRU) and trajectory direction vector (TDV) with attention mechanism. This paper firstly proposes a TDV to associate latitude and longitude with the course and speed. Then the paper proposes an attention mechanism to self-adaptively update weight to the TDV in different stages to eliminate unreasonable predicted trajectory points. Finally, this paper combines the TDV attention mechanism and the BiGRU network to train a vessel trajectory prediction model.
    Keywords Computer science ; Artificial intelligence ; Machine learning ; Science ; Q
    Subject code 620
    Language English
    Publishing date 2023-04-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: CFD Computation of Flow Fractional Reserve (FFR) in Coronary Artery Trees Using a Novel Physiologically Based Algorithm (PBA) Under 3D Steady and Pulsatile Flow Conditions

    Nursultan Alzhanov / Eddie Y. K. Ng / Xiaohui Su / Yong Zhao

    Bioengineering, Vol 10, Iss 309, p

    2023  Volume 309

    Abstract: A novel physiologically based algorithm (PBA) for the computation of fractional flow reserve (FFR) in coronary artery trees (CATs) using computational fluid dynamics (CFD) is proposed and developed. The PBA was based on an extension of Murray’s law and ... ...

    Abstract A novel physiologically based algorithm (PBA) for the computation of fractional flow reserve (FFR) in coronary artery trees (CATs) using computational fluid dynamics (CFD) is proposed and developed. The PBA was based on an extension of Murray’s law and additional inlet conditions prescribed iteratively and was implemented in OpenFOAM v1912 for testing and validation. 3D models of CATs were created using CT scans and computational meshes, and the results were compared to invasive coronary angiographic (ICA) data to validate the accuracy and effectiveness of the PBA. The discrepancy between the calculated and experimental FFR was within 2.33–5.26% in the steady-state and transient simulations, respectively, when convergence was reached. The PBA was a reliable and physiologically sound technique compared to a current lumped parameter model (LPM), which is based on empirical scaling correlations and requires nonlinear iterative computing for convergence. The accuracy of the PBA method was further confirmed using an FDA nozzle, which demonstrated good alignment with the CFD-validated values.
    Keywords FFR ; blood flow simulation ; coronal stenosis ; coronary computed tomography angiography (CCTA) ; OpenFOAM ; Technology ; T ; Biology (General) ; QH301-705.5
    Subject code 621
    Language English
    Publishing date 2023-02-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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