LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 2475

Search options

  1. Article ; Online: Research on Intelligent English Education Based on the Short Video Recommendation Algorithm.

    Li, Xiaoyu

    Computational intelligence and neuroscience

    2023  Volume 2023, Page(s) 2317589

    Abstract: In order to solve the problems of English education in the form of a short video, a research method of English intelligent education based on a short video recommendation algorithm was proposed. The recommendation system is a branch of artificial ... ...

    Abstract In order to solve the problems of English education in the form of a short video, a research method of English intelligent education based on a short video recommendation algorithm was proposed. The recommendation system is a branch of artificial intelligence data mining, which improves the efficiency of short videos for English learning. The density ratio of users and video scoring matrix was 1000000/(1030 × 9394) = 10.3%. The dataset was a relatively sparse matrix. The original dataset was randomly divided into the training set and the test set, accounting for 80% and 20%, respectively. Then, the results of the short video recommendation algorithm were elaborated based on time weighting. Finally, the intelligent initial question bank of English intelligent education based on a short video recommendation algorithm was elaborated, which provided a guarantee for the promotion of short videos in English education.
    MeSH term(s) Artificial Intelligence ; Algorithms ; Intelligence ; Learning ; Data Mining
    Language English
    Publishing date 2023-07-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2388208-6
    ISSN 1687-5273 ; 1687-5273
    ISSN (online) 1687-5273
    ISSN 1687-5273
    DOI 10.1155/2023/2317589
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  2. Article ; Online: Analysis of College Students' Psychological Education Management in Public Emergencies Based on Big Data.

    Li, Xiaoyu

    Journal of environmental and public health

    2022  Volume 2022, Page(s) 2654437

    Abstract: In recent years, college students' psychological problems have occurred frequently, and the early warning of college students' psychological crisis has received social attention. Artificial intelligence and big data, as emerging technologies that have ... ...

    Abstract In recent years, college students' psychological problems have occurred frequently, and the early warning of college students' psychological crisis has received social attention. Artificial intelligence and big data, as emerging technologies that have attracted much attention in recent years, have broad application and development space in improving the development of intelligent and refined education in colleges and universities. Applying artificial intelligence and big data to the practice of college students' mental health education plays a very positive role in accurately finding and scientifically solving college students' mental health problems. This paper combs the current application and research of artificial intelligence and big data in college students' mental health education and then clarifies the problems existing in the practical application. Finally, on the basis of in-depth analysis of the characteristics of college students' psychological crisis, the paper designs college students' psychological crisis early warning data collection system from six aspects, including the educational administration system and the access control system. And from the aspects of establishing a multilevel linkage feedback early warning system, building a team of big data technical personnel and mental health education personnel, it puts forward countermeasures for college students' psychological crisis, so as to provide theoretical and methodological support for college mental health management.
    MeSH term(s) Artificial Intelligence ; Big Data ; Emergencies ; Humans ; Students/psychology ; Universities
    Language English
    Publishing date 2022-09-19
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2526611-1
    ISSN 1687-9813 ; 1687-9813
    ISSN (online) 1687-9813
    ISSN 1687-9813
    DOI 10.1155/2022/2654437
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  3. Article ; Online: Factors affecting the protection of data rights in sports events: a configurational analysis.

    Li, Xiaoyu / Guo, Xinyan

    Scientific reports

    2024  Volume 14, Issue 1, Page(s) 5353

    Abstract: The development of algorithms and the spread of digital infrastructure have contributed significantly to the productivity of the digital economy. Data has come to be known as the "oil of the digital economy". At the same time, data has begun to ... ...

    Abstract The development of algorithms and the spread of digital infrastructure have contributed significantly to the productivity of the digital economy. Data has come to be known as the "oil of the digital economy". At the same time, data has begun to participate more deeply in the production activities of the global sports industry chain, and the international discussion on how to protect the rights of sports event data has been increasing. Based on the configurational theory and fuzzy-set qualitative comparative analysis, this study discusses the factors affecting the protection of sports event data rights. The study found three configuration paths for achieving high enterprise data protection effectiveness and two for achieving low enterprise data protection effectiveness. The results of this study provide theoretical support for governments to address the issue of sports event data rights. They will also facilitate the safe use of data in sports, promote the global sports industry and humanitarian action development, and contribute to international sustainable development.
    Language English
    Publishing date 2024-03-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-024-56074-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  4. Article ; Online: Analysis of Blocking Middle Seat Policy of Delta Airline

    Li Xiaoyu

    E3S Web of Conferences, Vol 218, p

    2020  Volume 03005

    Abstract: The main content of the research is about the seat blocking policy of Delta airline and its influences. The idea of the research comes up as airline industry is one of the most influenced industry by covid-19 pandemic and Delta’s action in this severe ... ...

    Abstract The main content of the research is about the seat blocking policy of Delta airline and its influences. The idea of the research comes up as airline industry is one of the most influenced industry by covid-19 pandemic and Delta’s action in this severe situation is worth to analyze. SWOT analysis will be conducted in this research, force field analysis, final account analysis and ratio analysis to study the decision of empty the middle seat. From the research, the author wants to have the conclusion about how the policy is going to affect the delta airline, and whether the policy should be kept or not. The conclusion is that Delta airline should keep on the blocking seat policy because almost the passengers has good impressions on the company.
    Keywords Environmental sciences ; GE1-350
    Language English
    Publishing date 2020-01-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  5. Book ; Online: Formal guarantees for heuristic optimization algorithms used in machine learning

    Li, Xiaoyu

    2022  

    Abstract: Recently, Stochastic Gradient Descent (SGD) and its variants have become the dominant methods in the large-scale optimization of machine learning (ML) problems. A variety of strategies have been proposed for tuning the step sizes, ranging from adaptive ... ...

    Abstract Recently, Stochastic Gradient Descent (SGD) and its variants have become the dominant methods in the large-scale optimization of machine learning (ML) problems. A variety of strategies have been proposed for tuning the step sizes, ranging from adaptive step sizes to heuristic methods to change the step size in each iteration. Also, momentum has been widely employed in ML tasks to accelerate the training process. Yet, there is a gap in our theoretical understanding of them. In this work, we start to close this gap by providing formal guarantees to a few heuristic optimization methods and proposing improved algorithms. First, we analyze a generalized version of the AdaGrad (Delayed AdaGrad) step sizes in both convex and non-convex settings, showing that these step sizes allow the algorithms to automatically adapt to the level of noise of the stochastic gradients. We show for the first time sufficient conditions for Delayed AdaGrad to achieve almost sure convergence of the gradients to zero. Moreover, we present a high probability analysis for Delayed AdaGrad and its momentum variant in the non-convex setting. Second, we analyze SGD with exponential and cosine step sizes, which are empirically successful but lack theoretical support. We provide the very first convergence guarantees for them in the smooth and non-convex setting, with and without the Polyak-{\L}ojasiewicz (PL) condition. We also show their good property of adaptivity to noise under the PL condition. Third, we study the last iterate of momentum methods. We prove the first lower bound in the convex setting for the last iterate of SGD with constant momentum. Moreover, we investigate a class of Follow-The-Regularized-Leader-based momentum algorithms with increasing momentum and shrinking updates. We show that their last iterate has optimal convergence for unconstrained convex stochastic optimization problems.

    Comment: Ph.D. Thesis
    Keywords Computer Science - Machine Learning ; Statistics - Machine Learning
    Subject code 510
    Publishing date 2022-07-31
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  6. Article ; Online: Severe bradycardia induced by postoperative nausea and vomiting: A case report.

    Li, Xiaoyu / Lu, Bo

    Medicine

    2023  Volume 102, Issue 34, Page(s) e34736

    Abstract: Introduction: Postoperative nausea and vomiting is a common complication for patients after anesthesia and surgery, which may result in increased parasympathetic activity, such as diaphoresis, pallor, or bradycardia. However, few cases of fatal ... ...

    Abstract Introduction: Postoperative nausea and vomiting is a common complication for patients after anesthesia and surgery, which may result in increased parasympathetic activity, such as diaphoresis, pallor, or bradycardia. However, few cases of fatal bradycardia induced by postoperative nausea and vomiting have been reported before. Clinicians generally attribute bradycardia to certain anesthetics, instead of postoperative nausea or vomiting.
    Patient concerns: A fifty-year-old female with a history of well-controlled hypertension underwent elective radical mastectomy. When recovering from anesthesia in the post-anesthesia care unit, the patient experienced severe bradycardia accompanied by hypotension and unconsciousness, shortly after nausea and vomiting.
    Interventions: The patient received cardiopulmonary resuscitation immediately.
    Outcomes: Five minutes later, She recovered sinus rhythm and her vital sings tended to be stable. Three hours later, blood tests showed the N-terminal pro-B-type natriuretic peptide 127 pg/mL and cardiac troponin I 0.44 ng/mL, which peaked to 2.65 ng/mL 10 hours after the emergency. Electrocardiography revealed sinus rhythm, ST-segment depression in the inferior and anterior lateral leads, QTc prolongation, and left ventricular high voltage. Her serum cTnI continued to decline to 0.27 ng/mL on the 3rd day after surgery. She was discharged from the hospital on the fifth day and had no sequelae.
    Conclusion: Although postoperative nausea and vomiting occurs frequently, it should be kept in mind as a potential cause to blame for severe bradycardia or even life-threatening situations.
    MeSH term(s) Humans ; Female ; Middle Aged ; Postoperative Nausea and Vomiting/etiology ; Bradycardia/etiology ; Bradycardia/therapy ; Breast Neoplasms ; Mastectomy ; Anesthesia
    Language English
    Publishing date 2023-08-31
    Publishing country United States
    Document type Case Reports ; Journal Article
    ZDB-ID 80184-7
    ISSN 1536-5964 ; 0025-7974
    ISSN (online) 1536-5964
    ISSN 0025-7974
    DOI 10.1097/MD.0000000000034736
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Ua VI Zs.171: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  7. Article ; Online: Facilitate or Diminish? Mechanisms of Perceived Organizational Support on Employee Experience of New Generation Employees.

    Li, Xiaoyu / Yang, Pengcheng

    Psychological reports

    2023  , Page(s) 332941231183621

    Abstract: The new generation of employees has emerged as a major force in the labor market, and their employee experience has become a significant factor in transforming the employment relationship. The objective of this study is to see if perceived organizational ...

    Abstract The new generation of employees has emerged as a major force in the labor market, and their employee experience has become a significant factor in transforming the employment relationship. The objective of this study is to see if perceived organizational support influences the employee experience of the new generation of employees. Also, considering that the underlying mechanisms between the two are unclear, this study explores the mediating role of proactive personality and the moderating role of emotional exhaustion. This study used the Perceived Organizational Support Scale, Employee Experience Scale, Proactive Personality Scale, and Emotional Exhaustion Scale to survey 550 new-generation employees in China. The results showed that: perceived organizational support facilitated the level of employee experience of new generation employees; proactive personality partially mediated the relationship between perceived organizational support and employee experience. In addition, emotional exhaustion moderated the relationship between perceived organizational support and proactive personality. This study reveals the mechanisms of organizational and individual factors on the employee experience of new generation employees, explores the growth path of employee experience of new generation employees, and provides insights into the management practice work of business leaders.
    Language English
    Publishing date 2023-06-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 205658-6
    ISSN 1558-691X ; 0033-2941
    ISSN (online) 1558-691X
    ISSN 0033-2941
    DOI 10.1177/00332941231183621
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.B 668: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  8. Article ; Online: A tripartite evolutionary game analysis of sports data rights protection from the perspective of stakeholder.

    Li, Xiaoyu / Guo, Xinyan

    PloS one

    2023  Volume 18, Issue 11, Page(s) e0292914

    Abstract: The amount of data in the globe is increasing at an exponential rate, and the role of digital technology and data elements in the modern growth of China's sports business is becoming more significant. Disputes over sports data rights have grown in the ... ...

    Abstract The amount of data in the globe is increasing at an exponential rate, and the role of digital technology and data elements in the modern growth of China's sports business is becoming more significant. Disputes over sports data rights have grown in the international arena, with a special focus on how to preserve the sports data rights of key stakeholders. This study begins from the standpoint of stakeholders, constructs a tripartite evolutionary game model of the government, sports enterprises, and the public around the issue of sports data rights protection, investigates the behavioral evolutionary characteristics of each stakeholder and its stabilization strategies, simulates and analyzes the evolutionary stabilization strategies of the stakeholders in various situations using MATLAB, and proposes a compatible institution. According to the findings of this study, the cost of sports data governance, the cost of sports data sharing, the degree of sports data compliance use, the government incentive system, and the government regulation mechanism are the important elements impacting each stakeholder's behavioral decision-making. Based on the foregoing, the study proposes corresponding institutional strategies for governments to respond to the issue of sports data rights, which will be more conducive to the safe use of data for development and humanitarian action, as well as contribute to global sustainable development.
    MeSH term(s) Government ; Sustainable Development ; Biological Evolution ; Motivation ; Health Facilities ; China ; Game Theory
    Language English
    Publishing date 2023-11-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0292914
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  9. Article ; Online: The resilience of ecosystems to drought.

    Zhang, Zhenyu / Li, Xiaoyu

    Global change biology

    2023  Volume 29, Issue 13, Page(s) 3517–3518

    MeSH term(s) Ecosystem ; Droughts ; Forests ; Trees
    Language English
    Publishing date 2023-04-25
    Publishing country England
    Document type Journal Article ; Comment
    ZDB-ID 1281439-8
    ISSN 1365-2486 ; 1354-1013
    ISSN (online) 1365-2486
    ISSN 1354-1013
    DOI 10.1111/gcb.16724
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 6338: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  10. Article ; Online: Microchannel Gas Flow in the Multi-Flow Regime Based on the Lattice Boltzmann Method.

    Li, Xiaoyu / Ning, Zhi / Lü, Ming

    Entropy (Basel, Switzerland)

    2024  Volume 26, Issue 1

    Abstract: In this work, a lattice Boltzmann method (LBM) for studying microchannel gas flow is developed in the multi-flow regime. In the LBM, by comparing previous studies' results on effective viscosity in multi-flow regimes, the values of the rarefaction factor ...

    Abstract In this work, a lattice Boltzmann method (LBM) for studying microchannel gas flow is developed in the multi-flow regime. In the LBM, by comparing previous studies' results on effective viscosity in multi-flow regimes, the values of the rarefaction factor applicable to multi-flow regions were determined, and the relationship between relaxation time and
    Language English
    Publishing date 2024-01-18
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2014734-X
    ISSN 1099-4300 ; 1099-4300
    ISSN (online) 1099-4300
    ISSN 1099-4300
    DOI 10.3390/e26010084
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

To top