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  1. Book ; Online: Virtual environments for grid computing

    Wang, Lizhe

    2009  

    Abstract: This book therefore proposes a new philosophy of Grid usage: provide virtual computing environments for Grid users. The new methodology could solve the problems currently encountered by Grid computing. It supports desired computing environments for users, ...

    Abstract This book therefore proposes a new philosophy of Grid usage: provide virtual computing environments for Grid users. The new methodology could solve the problems currently encountered by Grid computing. It supports desired computing environments for users, which provide customized hardware/software configuration, QoS assurance and manageable functionality. This philosophy also liberates resource providers from the various onerous tasks of resource management
    Keywords Technology (General)
    Size 1 electronic resource (VII, 161 p. p.)
    Publisher KIT Scientific Publishing
    Publishing place Verlagsort nicht ermittelbar
    Document type Book ; Online
    Note ENGLISH ; Open Access
    HBZ-ID HT020196789
    ISBN 9783866443105 ; 3866443102
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Article: Modal Response Improvement of Periodic Lattice Materials with a Shear Modulus-Based FE Homogenized Model.

    Luo, Tianheng / Wang, Lizhe / Liu, Fuyuan / Chen, Min / Li, Ji

    Materials (Basel, Switzerland)

    2024  Volume 17, Issue 6

    Abstract: Lattice materials are widely used in industries due to their designable capabilities of specific stiffness and energy absorption. However, evaluating the mechanical response of macroscopic lattice structures can be computationally expensive. ... ...

    Abstract Lattice materials are widely used in industries due to their designable capabilities of specific stiffness and energy absorption. However, evaluating the mechanical response of macroscopic lattice structures can be computationally expensive. Homogenization-based multi-scale analysis offers an efficient approach to address this issue. To achieve a simpler, while precise, homogenization, the authors proposed an equidistant segmentation (ES) method for the measurement of the effective shear modulus. In this method, the periodic boundary conditions (PBCs) are approximated by constraining the lateral displacement of nodes between parallel layers of periodic cells. The validations were applied to three typical lattice topologies: body-centered cubic (BCC) lattices, gyroid-, and primitive-triply periodic minimal surface (TPMS) lattices, to predict and compare their anti-vibration capacities. The results demonstrated the rationality and the promising precision of the multi-scale-based equivalent modal analysis through the proposed method and that it eliminated the geometric limitation of lattices with diverse frameworks. Overall, a higher anti-vibration capacity of TPMS was observed. In the study, the authors examined the influence of the relative densities on the balance between the anti-vibration capacity and loading capacity (per unit mass) of the TPMS topologies. Specifically, the unit mass of the TPMS with lower relative densities was able to resist higher frequencies, and the structures were dominated by the anti-vibration capacity. In contrast, a higher relative density is better when emphasizing the loading capacity. These findings may provide notable references to the designers and inform the selection of lattice materials for various industrial applications.
    Language English
    Publishing date 2024-03-12
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma17061314
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Detecting the interaction between urban elements evolution with population dynamics model.

    Jin, Min / Wang, Lizhe / Ge, Fudong / Yan, Jining

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 12367

    Abstract: Exploring the evolution of urban elements can improve understanding of the developmental process of city and drive such development into a better direction. However, the non-linearity and complexity of changes in urban elements have brought great ... ...

    Abstract Exploring the evolution of urban elements can improve understanding of the developmental process of city and drive such development into a better direction. However, the non-linearity and complexity of changes in urban elements have brought great challenges to understanding this process. In this paper, we propose a cross-diffusion partial differential equation based on ecological dynamics to simulate the evolutionary process of urban elements from the microscopic viewpoint. The interaction between urban elements is simulated by constructing a non-linear and spatiotemporal change equation, and the main influence between elements is evaluated by the key parameters in the discussed equation. Our model is first experimented to time-series data on population density and housing prices to analyzes the interaction of these two elements in the evolution process. We then extend the model to label data, land cover data, to obtain a quantitative expression of the interaction between different land types in the process of urban land cover change.
    Language English
    Publishing date 2023-07-31
    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/s41598-023-38979-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Cyber-physical oil spill monitoring and detection for offshore petroleum risk management service.

    Wang, Yuewei / Chen, Xiaodao / Wang, Lizhe

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 4586

    Abstract: Petroleum industry has started to embrace the advanced petroleum cyber-physical system (CPS) technologies. Offshore petroleum CPS is particularly hard to build, mainly due to the difficulty in detecting and preventing offshore oil leaking. During the oil ...

    Abstract Petroleum industry has started to embrace the advanced petroleum cyber-physical system (CPS) technologies. Offshore petroleum CPS is particularly hard to build, mainly due to the difficulty in detecting and preventing offshore oil leaking. During the oil exploration and transportation process, the remote multi-sensing technology is typically employed for emerging service. It can be utilized for leak detection by enabling the underwater modeling of an offshore petroleum CPS. However, such a technology suffers from insufficient remote sensing resources and expensive computational overhead. In this work, a cross-entropy based leak detection technique is proposed to detect the oil leak, which facilitates the understanding of the oil leak induced marine pollution. Furthermore, a hierarchical parallel approach is proposed on the super computer Tianhe-2 to improve the efficiency of the proposed leak detection technique. Experimental results on Penglai oil spill events demonstrate that the proposed method can effectively identify the sources of oil spilling with accuracy up to [Formula: see text].
    Language English
    Publishing date 2023-03-20
    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/s41598-023-30311-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Blind identification of active landslides in urban areas: a new set of comprehensive criteria

    Wang, Xianmin / Guo, Haonan / Ding, Ziyang / Wang, Lizhe

    Environ Sci Pollut Res. 2023 Jan., v. 30, no. 2 p.3088-3111

    2023  

    Abstract: More than 70% of catastrophic landslides were previously unknown and brought tremendous losses to human life and property in urban regions; therefore, there is an urgent need for early identification of active landslides to eliminate landslide risk at ... ...

    Abstract More than 70% of catastrophic landslides were previously unknown and brought tremendous losses to human life and property in urban regions; therefore, there is an urgent need for early identification of active landslides to eliminate landslide risk at the early stage. However, early identification of landslides has always been a worldwide challenge due to high concealment, steep topography, inaccessible location, and sudden onset. This work suggests a new set of comprehensive criteria for the early identification of landslides by integrating surface deformation, geological, topographic, geomorphological, and disaster-failure features. This set of criteria is universally applicable with no use of the prior knowledge of landslide locations (blind identification) and is successfully validated by a field survey. This work selects the Xuecheng region, a hard-hit area of landslides, as the study area and employs multisource data (seismic, geological, topographic, meteorological, SAR, and optical remote sensing data) and time-series InSAR technology to identify active landslides and reveal their deformation rules. Some new viewpoints are suggested. (1) The new comprehensive criteria synthesize the surface deformation, disaster-controlling, and disaster-inducing characteristics and achieve relatively high accuracy by field validation. (2) Forty-seven active landslides are identified in Xuecheng with no use of the prior knowledge of landslides. The soft rocks or soft-hard interbeddings, tectonic movement, fluvial undercutting and eroding, precipitation, earthquakes, and human engineering activity control or induce the development of these active landslides. (3) Two giant landslides that significantly threaten human lives and properties and exhibit different movement modes are selected to highlight the deformation rules of active landslides under the coupled action of poor lithologic condition, tectonic movement, river erosion, precipitation, and human engineering activity. The suggested new criteria can be applied to other landslide hard-hit urban regions and contribute to the timely and effective prevention and control of catastrophic landslides, reduction of enormous disaster losses, and rational management of the environment.
    Keywords deformation ; environmental management ; geophysics ; humans ; landslides ; risk ; rivers ; surveys ; tectonics ; time series analysis ; topography
    Language English
    Dates of publication 2023-01
    Size p. 3088-3111.
    Publishing place Springer Berlin Heidelberg
    Document type Article ; Online
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-022-22418-w
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 5915: Show issues

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  6. Article ; Online: Spectral-spatial-sparse unmixing with superpixel-oriented graph Laplacian

    Li, Zhi / Feng, Ruyi / Wang, Lizhe / Zeng, Tieyong

    International Journal of Remote Sensing. 2023 Apr. 18, v. 44, no. 8 p.2573-2589

    2023  

    Abstract: Sparse unmixing has made great progress in hyperspectral unmixing recently. To improve the unmixing accuracy, spatial information has been widely added to the unmixing model. However, due to the complexity of ground material mixing, the performance of ... ...

    Abstract Sparse unmixing has made great progress in hyperspectral unmixing recently. To improve the unmixing accuracy, spatial information has been widely added to the unmixing model. However, due to the complexity of ground material mixing, the performance of the same model in different situations is unsatisfying. Dataset with a uniform blocky area and sharp boundaries, superpixel-based unmixing methods cluster similar pixels together and effectively exploit spatial correlation and work well, and the same to homogeneous mixed pixels, which usually have the same endmembers and abundance usually. However, if the dataset is mixed randomly and irregularly, the above idea failed. To deal with different mixed situations comprehensively and efficiently, a new method, named spectral-spatial-sparse unmixing with superpixel-oriented graph Laplacian (SGLapS³U), is proposed in this paper. For datasets with patched uniform distribution, the superpixel-oriented graph Laplacian can better investigate the spatial correlation of pixels within each patch. For datasets with irregular mixing situation, a spectral-spatial weighting factor is utilized to explore the spatial continuity of the images, while also guaranteeing the sparsity of the results. The experimental results on different datasets demonstrate the superiority of the proposed algorithm.
    Keywords algorithms ; data collection ; models ; spatial data ; sparse unmixing ; superpixel ; graph Laplacian ; spectral-spatial weighting
    Language English
    Dates of publication 2023-0418
    Size p. 2573-2589.
    Publishing place Taylor & Francis
    Document type Article ; Online
    ZDB-ID 1497529-4
    ISSN 1366-5901 ; 0143-1161
    ISSN (online) 1366-5901
    ISSN 0143-1161
    DOI 10.1080/01431161.2023.2204198
    Database NAL-Catalogue (AGRICOLA)

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  7. Article: Mechanical Characterization of Multifunctional Metal-Coated Polymer Lattice Structures.

    Wang, Lizhe / He, Liu / Liu, Fuyuan / Yuan, Hang / Li, Ji / Chen, Min

    Materials (Basel, Switzerland)

    2024  Volume 17, Issue 3

    Abstract: Metal-coated lattice structures hold significant promise for customizing mechanical properties in diverse industrial applications, including the mechanical arms of unmanned aerial vehicles. However, their intricate geometries pose computational ... ...

    Abstract Metal-coated lattice structures hold significant promise for customizing mechanical properties in diverse industrial applications, including the mechanical arms of unmanned aerial vehicles. However, their intricate geometries pose computational challenges, resulting in time-intensive and costly numerical evaluations. This study introduces a parameterization-based multiscale method to analyze body-centered cubic lattice structures with metal coatings. We establish the validity and precision of our proposed method with a comparative analysis of numerical results at the Representative Volume Element (RVE) scale and experimental findings, specifically addressing both elastic tensile and bending stiffness. Furthermore, we showcase the method's accuracy in interpreting the bending stiffness of coated lattice structures using a homogenized material-based solid model, underscoring its effectiveness in predicting the elastic properties of such structures. In exploring the mechanical characterization of coated lattice structures, we unveil positive correlations between elastic tensile stiffness and both coating thickness and strut diameter. Additionally, the metal coating significantly enhances the structural elastic bending stiffness multiple times over. The diverse failure patterns observed in coated lattices under tensile and bending loads primarily stem from varied loading-induced stress states rather than external factors. This work not only mitigates computational challenges but also successfully bridges the gap between mesoscale RVE mechanical properties and those at the global structural scale.
    Language English
    Publishing date 2024-02-03
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma17030741
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Penetrating remote sensing: Next-generation remote sensing for transparent earth.

    Wang, Lizhe / Zuo, Boxin / Le, Yuan / Chen, Yifu / Li, Jun

    Innovation (Cambridge (Mass.))

    2023  Volume 4, Issue 6, Page(s) 100519

    Language English
    Publishing date 2023-09-29
    Publishing country United States
    Document type Journal Article ; Review
    ISSN 2666-6758
    ISSN (online) 2666-6758
    DOI 10.1016/j.xinn.2023.100519
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Stress-field driven conformal lattice design using circle packing algorithm.

    Liu, Fuyuan / Chen, Min / Wang, Lizhe / Luo, Tianheng / Chen, Geng

    Heliyon

    2023  Volume 9, Issue 3, Page(s) e14448

    Abstract: Reliable extreme lightweight is the pursuit in many high-end manufacturing areas. Aided by additive manufacturing (AM), lattice material has become a promising candidate for lightweight optimization. Configuration of lattice units at the material level ... ...

    Abstract Reliable extreme lightweight is the pursuit in many high-end manufacturing areas. Aided by additive manufacturing (AM), lattice material has become a promising candidate for lightweight optimization. Configuration of lattice units at the material level and the distribution of lattice units at the structure level are the two main research directions recently. This paper proposes a generative strategy for lattice infilling optimization using organic strut-based lattices. A sphere packing algorithm driven by von Mises stress fields determines the lattice distribution density. Two typical configurations, Voronoi polygons and Delaunay triangles, are adopted to constitute the frames, respectively. Based on finite element analysis, a simplified truss model is utilized to evaluate the lattice distribution in terms of mechanical properties. Optimization parameters, including node number, mapping gradient, and the range of varying circle size, are investigated through the genetic algorithm (GA). Multiple feasible solutions are obtained for further solidification modelling. To avoid the stress concentration, the organic strut-based lattice units are created by the iso-surface modelling method. The effectiveness of the proposed generative approach is illustrated through a classical 3-point bending beam. The stiffness of the optimized structure, verified through experimental testing, has increased 80% over the one using the traditional uniform body center cubic (BCC) lattice distribution.
    Language English
    Publishing date 2023-03-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2023.e14448
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Characteristics and Outcomes of Chinese Children With Advanced Stage Anaplastic Large Cell Lymphoma: A Single-Center Experience.

    Zhang, Yu-Tong / Wang, Li-Zhe / Chang, Jian

    Frontiers in oncology

    2022  Volume 12, Page(s) 832752

    Abstract: Purpose: To evaluate the clinical characteristics and treatment outcomes of Chinese children with advanced stage anaplastic large cell lymphoma (ALCL) who were treated with the low-intensity APO regimen.: Methods: Clinical data from children newly ... ...

    Abstract Purpose: To evaluate the clinical characteristics and treatment outcomes of Chinese children with advanced stage anaplastic large cell lymphoma (ALCL) who were treated with the low-intensity APO regimen.
    Methods: Clinical data from children newly diagnosed with advanced stage ALCL and treated with the APO regimen were reviewed.
    Results: Altogether 22 eligible patients with advanced stage ALCL were recruited in this study. 18 (81%) patients achieved complete response (CR) after the initial induction, and 4 experienced relapse. Among patients with relapsed or refractory ALCL, CR was achieved in 3 (50%) who received the BFM95 R3/R4 regimen. Besides, 2 patients received the targeted therapy with crizotinib and were still alive. The 5-year OS and EFS rates were 82 ± 8.7% and 68.2 ± 9.4%%, respectively. According to our results, the elevated LDH level and bone marrow involvement were identified as the poor prognostic factors for EFS (p=0.035 and 0.048, respectively). During APO treatment, only 23% patients experienced grade 3-4 hematologic toxicity.
    Conclusions: In this study, bone marrow involvement and elevated serum LDH levels were identified as the poor prognostic factors for EFS. In resource-limited regions, patients with advanced stage ALCL can also achieve comparable outcomes to those in high-income regions, and the BFM95 R3/R4 regimen can take the role of salvage treatment for patients with relapsed or refractory disease. Nonetheless, new therapeutic strategy is still needed.
    Language English
    Publishing date 2022-02-15
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2649216-7
    ISSN 2234-943X
    ISSN 2234-943X
    DOI 10.3389/fonc.2022.832752
    Database MEDical Literature Analysis and Retrieval System OnLINE

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