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  • SAGE Publications  (7)
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  • SAGE Publications  (7)
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  • 1
    Online Resource
    Online Resource
    HiCoACR: A reconfiguration decision-making model for reconfigurable security protocol based on hierarchically collaborative ant colony
    SAGE Publications ; 2020
    In:  International Journal of Distributed Sensor Networks Vol. 16, No. 3 ( 2020-03), p. 155014771989956-
    Details
    In: International Journal of Distributed Sensor Networks, SAGE Publications, Vol. 16, No. 3 ( 2020-03), p. 155014771989956-
    Abstract: Reconfigurable security protocols, with dynamic protocol configuration and flexible resource allocation, have become a state-of-the-art technology to guarantee the security of space-ground integrated network. However, reconfiguration decision-making for reconfigurable security protocols remains a major challenge in order to adapt to diverse secure service requirements and deploy higher security level but more complicated security strategies in nodes with limited resources and computing abilities. To handle this problem commendably, a hierarchically collaborative ant colony–based reconfiguration decision-making model called HiCoACR is proposed. This model, inspired by the ideas of hierarchical reinforcement learning and population collaboration, decomposes the reconfiguration decision-making problem into two sub-problems by introducing a two-level hierarchy ant colony consisting of the Explorer and the Worker. The Explorer controls directions of protocol reconfiguration and generates abstract scheduling sub-goals which are conveyed from the Worker. While the Worker schedules most suitable cryptogram resources for each sub-goal received and produces the optimal reconfiguration solution which is verified and re-optimized by a Lévy process–based stochastic gradient descent algorithm. Both the Explorer and the Worker adopt a modified version of ant colony algorithm to fulfill its targets, where a hierarchical pheromone is defined to reinforce positive behaviors of each ant colony. Experiment results suggest that HiCoACR outperforms baseline algorithms and possesses well model transferability.
    Type of Medium: Online Resource
    ISSN: 1550-1477 , 1550-1477
    URL: Article
    DOI: 10.1177/1550147719899563
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
    detail.hit.zdb_id: 2192922-1
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  • 2
    Online Resource
    Online Resource
    Increased signal intensity, not volume variation of infrapatellar fat pad in knee osteoarthritis: A cross-sectional study based on high-resolution magnetic resonance imaging
    SAGE Publications ; 2022
    In:  Journal of Orthopaedic Surgery Vol. 30, No. 1 ( 2022-01), p. 102255362210922-
    Details
    In: Journal of Orthopaedic Surgery, SAGE Publications, Vol. 30, No. 1 ( 2022-01), p. 102255362210922-
    Abstract: Infrapatellar fat pad (IPFP) is regarded as an essential knee tissue involved in osteoarthritis (OA) for its potential structural-related or metabolism-related function. This cross-sectional study aims to identify which part is more related to OA. Methods Patients with knee OA ( n = 53) and healthy controls ( n = 54) were prospectively recruited. Based on high-resolution magnetic resonance imaging with a slice thickness of only 0.35 mm, IPFP structural-related parameters (volume and maximal area), metabolism-related parameter (signal), degeneration indicators, and patellar maltracking indicators (patellar translation, patellofemoral angle, and Insall-Salvati ratio) were measured. IPFP volume (maximal area, and signal) was compared between healthy controls and OA patients. The level of significance for all comparisons was set as .05. Results OA patients had higher IPFP signal (672.9 ± 136.9 vs 567.3 ± 63.6, p = .009), but no significant difference in IPFP volume or maximal area compared with healthy controls. In healthy controls, IPFP signal was positively associated with age ( β = 1.481; 95% CI: 0.286–2.676; p = .018); IPFP maximal area was positively related to Insall-Salvati ratio ( β = 0.001; 95% CI: 0.0003–0.0017; p = .039), but not associated with patellar translation and patellofemoral angle. In OA patients, IPFP signal was positively associated with cartilage loss ( β = 0.005; 95% CI: 0.003–0.007; p = .013); no correlation between knee pain and IPFP volume or maximal area was observed. Conclusions The metabolism-related function of IPFP, which can be reflected by the IPFP signal, might play a more critical role in OA progression than its structural function.
    Type of Medium: Online Resource
    ISSN: 1022-5536 , 2309-4990
    URL: Article
    DOI: 10.1177/10225536221092215
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2022
    detail.hit.zdb_id: 2128854-9
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  • 3
    Online Resource
    Online Resource
    Healing Carbon Fiber/Polymer Interface by Resistive Heating
    SAGE Publications ; 2014
    In:  Polymers and Polymer Composites Vol. 22, No. 3 ( 2014-03), p. 337-340
    Details
    In: Polymers and Polymer Composites, SAGE Publications, Vol. 22, No. 3 ( 2014-03), p. 337-340
    Abstract: Interface is the key region which determines, to a great extent, the set of properties of all heterogeneous systems, including composite materials. We reported interface healing of carbon fiber reinforced thermoplastic composite material via resistive heating. The carbon fiber, T700 carbon fiber, with a resistivity of 1.66 × 10 3 Ω·cm was used as the heating element while the matrix is polyarylether sulfone with cardo. Micro-droplet experiment was used to study the interface strength before and after heating to determine the healing efficiency. The measurement shows (experimental results show) that resistive heating is an efficient way to heal cracks near interface.
    Type of Medium: Online Resource
    ISSN: 0967-3911 , 1478-2391
    URL: Article
    DOI: 10.1177/096739111402200317
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2014
    detail.hit.zdb_id: 2099644-5
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  • 4
    Online Resource
    Online Resource
    Preparation and tribological properties of a kind of lubricant containing cerium borate nanoparticles as additives
    SAGE Publications ; 2020
    In:  Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology Vol. 234, No. 11 ( 2020-11), p. 1789-1797
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, SAGE Publications, Vol. 234, No. 11 ( 2020-11), p. 1789-1797
    Abstract: Oil-soluble compounds containing boron as lubricating additives were restricted by the hydrolysis of borate ester. In order to overcome this problem, cerium borate nanoparticles modified with oleic acid (O-CeB) as a potential substitute for conventional lubricant additive were studied in detail. The microstructures of the prepared nanoparticles were characterized. Tribological properties of cerium borate nanoparticles used as additive in base oil were evaluated, and the worn surface of the steel ball was investigated. The results show that O-CeB possesses better anti-wear ability at relatively higher concentration; in particular, it shows better friction-reducing ability under all these studied concentrations. Under higher load, its anti-wear property and friction-reducing property are better than that of Vanlube 289 in the base oil. Based on these results of interferometric surface profilometer and X-ray photoelectron spectroscopy, it can be deduced that a continuous resistance film containing depositions and the tribochemical reaction products was formed during the sliding process.
    Type of Medium: Online Resource
    ISSN: 1350-6501 , 2041-305X
    URL: Article
    DOI: 10.1177/1350650119887041
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
    detail.hit.zdb_id: 2032767-5
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  • 5
    Online Resource
    Online Resource
    Effects of Perioperative Fascia Iliaca Compartment Block on Postoperative Pain and Hip Function in Elderly Patients With Hip Fracture
    SAGE Publications ; 2022
    In:  Geriatric Orthopaedic Surgery & Rehabilitation Vol. 13 ( 2022-01), p. 215145932210928-
    Details
    In: Geriatric Orthopaedic Surgery & Rehabilitation, SAGE Publications, Vol. 13 ( 2022-01), p. 215145932210928-
    Abstract: Pain management is a challenging issue in elderly patients with hip fracture. Despite the accepted clinical outcomes following hip surgery, pain and prolonged recovery time are the most difficult consequences associated with the rehabilitation process. The purpose of this study was to evaluate pain relief and functional improvement associated with the Fascia Iliaca Compartment Block (FICB) during the perioperative period of elderly patients with hip fracture. Patients and methods This study included 120 elderly patients with hip fracture, who were admitted to our institution between January 2019 and December 2020. The participants were subsequently randomly divided into the routine analgesia (RA) and fascia iliaca compartment block (FICB) groups. Inter-group differences were compared via VAS scores at rest and during movement, Harris hip scores (HHS), presence of complications, adverse events after surgery, and length of hospital stay. Results The FICB group VAS scores at rest at 6 hour, 1 and 3 days, and 1 week after surgery were significantly lower than the RA group ( P 〈 .05). Moreover, the FICB group VAS scores with movement were markedly lower at 6 hour, 1 and 3 days, as well as 1 and 2 weeks after surgery ( P 〈 .05). The HHS of the FICB and RA groups were (53.41±8.63) and (40.02±9.61), respectively, on the seventh day after surgery, and the difference was statistically significant ( P 〈 .05). The incidence of postoperative complications and adverse events in the FICB group were not statistically different from the RA group. The average hospital stay of the FICB group was 2.12 days shorter than the RA group, but the difference did not reach statistical significance ( P = .13). Conclusion FICB provides superior analgesic effect both at rest and with movement, along with rapid short-term recovery of hip function following surgery in elderly patients with hip fracture, without increasing postoperative complications or adverse events.
    Type of Medium: Online Resource
    ISSN: 2151-4593 , 2151-4593
    URL: Article
    DOI: 10.1177/21514593221092883
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2022
    detail.hit.zdb_id: 2589094-3
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  • 6
    Online Resource
    Online Resource
    A quality-of-service-aware dynamic evolution model for space–ground integrated network
    SAGE Publications ; 2017
    In:  International Journal of Distributed Sensor Networks Vol. 13, No. 8 ( 2017-08), p. 155014771772864-
    Details
    In: International Journal of Distributed Sensor Networks, SAGE Publications, Vol. 13, No. 8 ( 2017-08), p. 155014771772864-
    Abstract: Space–ground integrated network, a strategic, driving, and irreplaceable infrastructure, guarantees the development of economic and national security. However, its natures of limited resources, frequent handovers, and intermittently connected links significantly reduce the quality of service. To address this issue, a quality-of-service-aware dynamic evolution model is proposed based on complex network theory. On one hand, a quality-of-service-aware strategy is adopted in the model. During evolution phases of growth and handovers, links are established or deleted according to the quality-of-service-aware preferential attachment following the rule of better quality of service getting richer and worse quality of service getting poor or to die. On the other hand, dynamic handover of nodes and intermittent connection of links are taken into account and introduced into the model. Meanwhile, node heterogeneity is analyzed and heterogeneous nodes are endowed with discriminate interactions. Theoretical analysis and simulations are utilized to explore the degree distribution and its characteristics. Results reveal that this model is a scale-free model with drift power-law distribution, fat-tail and small-world effect, and drift character of degree distribution results from dynamic handover. Furthermore, this model exerts well fault tolerance and attack resistance compared to signal-strength-based strategy. In addition, node heterogeneity and quality-of-service-aware strategy improve the attack resistance and overall quality of service of space–ground integrated network.
    Type of Medium: Online Resource
    ISSN: 1550-1477 , 1550-1477
    URL: Article
    DOI: 10.1177/1550147717728649
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2017
    detail.hit.zdb_id: 2192922-1
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  • 7
    Online Resource
    Online Resource
    Analytical and experimental study on the axial stiffness of multiple corrugated diaphragm coupling based on the corrugated circular plate theory
    SAGE Publications ; 2021
    In:  Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science Vol. 235, No. 22 ( 2021-11), p. 6611-6620
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, SAGE Publications, Vol. 235, No. 22 ( 2021-11), p. 6611-6620
    Abstract: Compared to traditional couplings, the multiple corrugated diaphragm (MCD) coupling has the advantages of high torque diameter and weight ratios, and high compensation capability. Due to the irregularity of the MCD, it is difficult to analyze and study it through traditional methods. In this paper, an analytical method for calculating the axial stiffness of MCDs is derived based on the mechanical theory of corrugated circular plates, and the results of the analytical method, finite element method, and stiffness tests are compared. The results indicate that the analytical solution of the MCD axial stiffness is consistent with the finite element analysis and experimental results. This proves the feasibility of analyzing the MCDs using the theory of corrugated annular plates. This study provides a theoretical basis for the design of MCD coupling and can guide the rapid design of MCD coupling.
    Type of Medium: Online Resource
    ISSN: 0954-4062 , 2041-2983
    URL: Article
    DOI: 10.1177/09544062211014536
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2024890-8
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