LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 132

Search options

  1. Article ; Online: Distributed UUV cluster task allocation algorithm based on deep reinforcement learning

    HAO Guanjie / YAO Yao / CHANG Peng / ZHANG Xiaoshuang

    Zhihui kongzhi yu fangzhen, Vol 45, Iss 3, Pp 25-

    2023  Volume 33

    Abstract: Task allocation is one of the basic and key issues in the research of agent clusters. UUV clusters are limited by underwater detection and communication capabilities in task allocation. UUV individuals can only obtain partial information around them, and ...

    Abstract Task allocation is one of the basic and key issues in the research of agent clusters. UUV clusters are limited by underwater detection and communication capabilities in task allocation. UUV individuals can only obtain partial information around them, and conventional global algorithms cannot be applied well. A task allocation algorithm based on deep reinforcement learning and distributed UUV cluster organizational structure is proposed. The algorithm first realizes the partial task allocation of each UUV individual, and then the information between adjacent individuals is consistent and coordinated, thus realizing the optimal task allocation of UUV cluster. Through the simulation experiment, the algorithm in this paper converges faster than the genetic algorithm, has less traffic and higher task allocation efficiency than the contract network algorithm, and the distributed architecture does not rely on the "command center". The UUV cluster system has higher robustness and higher task allocation reliability.
    Keywords task allocation|deep reinforcement learning|distributed|multi-agent ; Military Science ; U
    Subject code 006
    Language Chinese
    Publishing date 2023-06-01T00:00:00Z
    Publisher Editorial Office of Command Control and Simulation
    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.

  2. Article ; Online: Challenges of mesenchymal stem cells in the clinical treatment of COVID-19.

    Li, Luping / Zhang, Xiaoshuang / Wu, Yawen / Xing, Cencan / Du, Hongwu

    Cell and tissue research

    2024  

    Abstract: The 2019 coronavirus disease (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has brought an enormous public health burden to the global society. The duration of the epidemic, the number of infected people, and the ... ...

    Abstract The 2019 coronavirus disease (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has brought an enormous public health burden to the global society. The duration of the epidemic, the number of infected people, and the widespread of the epidemic are extremely rare in modern society. In the initial stage of infection, people generally show fever, cough, and dyspnea, which can lead to pneumonia, acute respiratory syndrome, kidney failure, and even death in severe cases. The strong infectivity and pathogenicity of SARS-CoV-2 make it more urgent to find an effective treatment. Mesenchymal stem cells (MSCs) are a kind of pluripotent stem cells with the potential for self-renewal and multi-directional differentiation. They are widely used in clinical experiments because of their low immunogenicity and immunomodulatory function. Mesenchymal stem cell-derived exosomes (MSC-Exo) can play a physiological role similar to that of stem cells. Since the COVID-19 pandemic, a series of clinical trials based on MSC therapy have been carried out. The results show that MSCs are safe and can significantly improve patients' respiratory function and prognosis of COVID-19. Here, the effects of MSCs and MSC-Exo in the treatment of COVID-19 are reviewed, and the clinical challenges that may be faced in the future are clarified.
    Language English
    Publishing date 2024-03-21
    Publishing country Germany
    Document type Journal Article ; Review
    ZDB-ID 125067-x
    ISSN 1432-0878 ; 0302-766X
    ISSN (online) 1432-0878
    ISSN 0302-766X
    DOI 10.1007/s00441-024-03881-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Ub I Zs.94: 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.

  3. Article ; Online: Dynamic target search algorithm for AUV based on improved genetic algorithm

    XIE Feng, YAO Yao, ZHANG Xiaoshuang

    Zhihui kongzhi yu fangzhen, Vol 45, Iss 3, Pp 39-

    2023  Volume 45

    Abstract: For the underwater dynamic target searching problem, an AUV dynamic target search algorithm based on improved genetic algorithm is proposed. The Monte Carlo method is used to generate a large number of target motion trajectories as the basis for ... ...

    Abstract For the underwater dynamic target searching problem, an AUV dynamic target search algorithm based on improved genetic algorithm is proposed. The Monte Carlo method is used to generate a large number of target motion trajectories as the basis for calculating the fitness; a novel way to calculate the cumulative detection probability is proposed in combination with the hydroacoustic model

    the population selection adopts a combination of catastrophe idea and elitism method to ensure the non-inferiority and diversity of the population and accelerate the jump out of local extremes; chaotic sequence is used to select the crossover points and variation points to increase the population randomness; adopting dynamic adaptive crossover probability and variation probability reduce empirical dependence and ensure population diversity in the later stage. The simulation experimental results show that the improved genetic algorithm can effectively avoid falling into local extremes and improve the search probability compared with the traditional algorithm and classical genetic algorithm.
    Keywords dynamic target search|improved genetic algorithm|catastrophe idea|chaotic sequence|cumulative detection probability ; Military Science ; U
    Subject code 006
    Language Chinese
    Publishing date 2023-06-01T00:00:00Z
    Publisher Editorial Office of Command Control and Simulation
    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.

  4. Article ; Online: Research on multi granularity underwater situation awareness through virtual physics of artificial intelligence

    YIN Tangwen, SUN Yiyang, ZHANG Xiaoshuang

    Zhihui kongzhi yu fangzhen, Vol 45, Iss 3, Pp 7-

    2023  Volume 16

    Abstract: On the basis of analyzing the development of underwater multi-platform cluster variable granularity situational awareness, this paper studies the system of systems and the synchronization of spatiotemporal evolution for multi granularity underwater ... ...

    Abstract On the basis of analyzing the development of underwater multi-platform cluster variable granularity situational awareness, this paper studies the system of systems and the synchronization of spatiotemporal evolution for multi granularity underwater situation awareness. Virtual physical artificial intelligence theory and method for multi granularity underwater situation awareness are proposed to establish the dynamic virtual physical neural network embedded with interpretation models of context and knowledge. Driven by spatiotemporal data and context information, multi granularity underwater situation awareness and synchronous situation evolution analysis across domains are realized to make collaborative intelligent decisions for underwater offensive and defensive confrontation tasks. Theoretical analysis and numerical results show that multi granularity underwater situation awareness and synchronous situation evolution analysis can enhance information superiority by integrating cluster resources, with optimal involved functional domains and space-time scales. Our approach can provide a theoretical basis and technical reference for the construction and development of underwater all-around attack and defense systems.
    Keywords underwater attack and defense systems|physical neural network|situation awareness|situation evolution ; Military Science ; U
    Subject code 401
    Language Chinese
    Publishing date 2023-06-01T00:00:00Z
    Publisher Editorial Office of Command Control and Simulation
    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. Article ; Online: Controlled synthesis of ACo

    Li, Ping / Wang, Yanhong / Du, Xiaoqiang / Zhang, Xiaoshuang

    Dalton transactions (Cambridge, England : 2003)

    2023  Volume 52, Issue 30, Page(s) 10499–10506

    Abstract: Water electrolysis is relatively an environmentally friendly hydrogen production technology, but due to the slow transfer of four electrons in the anodic oxidation reaction, it needs a theoretical voltage of up to 1.23 V. Therefore, in this experiment, a ...

    Abstract Water electrolysis is relatively an environmentally friendly hydrogen production technology, but due to the slow transfer of four electrons in the anodic oxidation reaction, it needs a theoretical voltage of up to 1.23 V. Therefore, in this experiment, a series of transition metal oxides, ACo
    Language English
    Publishing date 2023-08-01
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d3dt01845h
    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.

  6. Article ; Online: Design of polymetallic sulfide NiS

    Chen, Mingshuai / Wu, Guangping / Du, Xiaoqiang / Zhang, Xiaoshuang

    Dalton transactions (Cambridge, England : 2003)

    2023  Volume 52, Issue 45, Page(s) 16943–16950

    Abstract: The shortage of freshwater resources in the world today has limited the development of water splitting, and our eyes have turned to the abundant seawater. The development of relatively low-toxicity and high-efficiency catalysts is the most important area ...

    Abstract The shortage of freshwater resources in the world today has limited the development of water splitting, and our eyes have turned to the abundant seawater. The development of relatively low-toxicity and high-efficiency catalysts is the most important area in seawater electrolysis. In this paper, the preparation of NiS
    Language English
    Publishing date 2023-11-21
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d3dt03233g
    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.

  7. Article ; Online: The synthesis of W-Ni

    Zhao, Han / Liu, Min / Du, Xiaoqiang / Zhang, Xiaoshuang

    Dalton transactions (Cambridge, England : 2003)

    2023  Volume 52, Issue 25, Page(s) 8811–8817

    Abstract: The development of efficient and stable non-precious-metal-based electrocatalysts is essential for practical water splitting applications. The electrolysis of water for hydrogen production is a green and efficient method, while urea electrolysis can ... ...

    Abstract The development of efficient and stable non-precious-metal-based electrocatalysts is essential for practical water splitting applications. The electrolysis of water for hydrogen production is a green and efficient method, while urea electrolysis can improve energy conversion efficiency. In this paper, W-Ni
    Language English
    Publishing date 2023-06-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d3dt01162c
    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.

  8. Article ; Online: Controlled synthesis of M doped NiVS (M = Co, Ce and Cr) as a robust electrocatalyst for urea electrolysis.

    Wang, Chao / Wang, Qirun / Du, Xiaoqiang / Zhang, Xiaoshuang

    Dalton transactions (Cambridge, England : 2003)

    2023  Volume 52, Issue 37, Page(s) 13161–13168

    Abstract: Urea electrolysis can be used to treat wastewater containing urea and alleviate the energy crisis, so it is one of the best ways to solve environmental and energy problems. This paper reports the synthesis of M doped NiVS (M = Co, Ce and Cr) composites ... ...

    Abstract Urea electrolysis can be used to treat wastewater containing urea and alleviate the energy crisis, so it is one of the best ways to solve environmental and energy problems. This paper reports the synthesis of M doped NiVS (M = Co, Ce and Cr) composites by a simple hydrothermal process for the first time. What is noteworthy is that the Ce-NiVS material as a catalytic electrode requires only 141 mV overpotential for the hydrogen evolution reaction (HER) and 1.291 V potential for the urea oxidation reaction (UOR) at a current density of 10 mA cm
    Language English
    Publishing date 2023-09-26
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d3dt02586a
    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: Controlled synthesis of Cr

    Li, Xinyu / Wang, Yanhong / Du, Xiaoqiang / Zhang, Xiaoshuang

    Dalton transactions (Cambridge, England : 2003)

    2023  Volume 52, Issue 6, Page(s) 1797–1805

    Abstract: Urea splitting is a highly promising technology for hydrogen production to cope with the fossil energy crisis, which requires the development of catalysts with high electrocatalytic activity. In this article, ... ...

    Abstract Urea splitting is a highly promising technology for hydrogen production to cope with the fossil energy crisis, which requires the development of catalysts with high electrocatalytic activity. In this article, Cr
    Language English
    Publishing date 2023-02-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472887-4
    ISSN 1477-9234 ; 1364-5447 ; 0300-9246 ; 1477-9226
    ISSN (online) 1477-9234 ; 1364-5447
    ISSN 0300-9246 ; 1477-9226
    DOI 10.1039/d2dt04163d
    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.

  10. Article ; Online: Advances in mesenchymal stromal cells and nanomaterials for diabetic wound healing.

    Hou, Liangxuan / Zhang, Xiaoshuang / Du, Hongwu

    Diabetes/metabolism research and reviews

    2023  Volume 39, Issue 4, Page(s) e3638

    Abstract: The delayed healing of diabetic wounds (DBW) will not only afflict patients, but also lead to amputation and even death in serious cases, which will create many negative effects on society and the country. Mesenchymal stromal cells (MSCs) have attracted ... ...

    Abstract The delayed healing of diabetic wounds (DBW) will not only afflict patients, but also lead to amputation and even death in serious cases, which will create many negative effects on society and the country. Mesenchymal stromal cells (MSCs) have attracted extensive attention for their applications in chronic wound healing due to their excellent cytokine secretion ability and regulation of inflammation. Mesenchymal stromal cells can be used alone or wrapped with carrier/matrix and applied to enhance healing in the wound area. In this review, the etiology of the slow healing of DBW and the mechanism by which MSCs promote the healing of DBW were explored. In addition, we summarised the current research progress on the use of stromal cell-loaded biomaterials for wound healing in diabetic animal models. At the end of the article, we pointed out the challenges and improvement strategies for stromal cell therapy applied to DBW in future clinical practice.
    MeSH term(s) Animals ; Wound Healing/physiology ; Mesenchymal Stem Cells ; Diabetes Mellitus/therapy ; Nanostructures ; Mesenchymal Stem Cell Transplantation
    Language English
    Publishing date 2023-04-08
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 1470192-3
    ISSN 1520-7560 ; 1520-7552
    ISSN (online) 1520-7560
    ISSN 1520-7552
    DOI 10.1002/dmrr.3638
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.A 2119: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    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.

To top