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  • SAGE Publications  (3)
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  • SAGE Publications  (3)
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  • 1
    Online Resource
    Online Resource
    Adaptive backstepping control for a hypersonic vehicle with uncertain parameters and actuator faults
    SAGE Publications ; 2013
    In:  Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering Vol. 227, No. 1 ( 2013-01), p. 51-61
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, SAGE Publications, Vol. 227, No. 1 ( 2013-01), p. 51-61
    Abstract: For a hypersonic vehicle with redundant elevators, an adaptive backstepping fault-tolerant control scheme is designed for its longitudinal motion model. In the backstepping design, the dynamic surface control strategy is adopted to eliminate the explosion of complexity in calculating the derivatives of virtual control inputs by introducing two first-order filters. An appropriate controller structure is proposed and the matching conditions are derived for adaptive fault compensation for the vehicle with redundant elevators subject to uncertain actuator faults. The adaptation laws are designed to update parameter estimates to implement the adaptive controller. The closed-loop stability under the proposed adaptive actuator fault compensation scheme is analyzed. Both analytical and simulation results are given to verify the effectiveness of the design and demonstrate the desired performance for altitude and velocity control.
    Type of Medium: Online Resource
    ISSN: 0959-6518 , 2041-3041
    URL: Article
    DOI: 10.1177/0959651812450134
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2013
    detail.hit.zdb_id: 2024903-2
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Comparison of the effects of Valsalva maneuver, EMLA cream, and the combination of both in relieving pain of needle insertion on totally implantable access port: A randomized controlled study
    SAGE Publications ; 2023
    In:  The Journal of Vascular Access
    Details
    In: The Journal of Vascular Access, SAGE Publications
    Abstract: Totally implantable access port (TIAP) is a subcutaneously implanted, long-term infusion device that is widely used in oncology patients. However, multiple needle insertions into TIAP may lead to pain, anxiety, and dread in patients. This study aimed to compare the effectiveness of Valsalva maneuver, eutectic mixture of local anesthetics (EMLA) cream, and the combination of both in relieving pain of cannulations on TIAP. Methods: This was a prospective randomized controlled study. We included 223 patients treated with antineoplastic drugs and randomized them into four groups: EMLA Group (Group E), control Group (Group C), Valsalva maneuver Group (Group V), and EMLA cream combing with Valsalva maneuver Group (Group EV). Each group was given the corresponding intervention before non-coring needle insertion. The data on pain scores and overall comfort were collected by numerical pain rating scale (NPRS) and visual analog scale (VAS). Results: Group E and Group EV experienced the least amount of pain scores in needle insertion, which was significantly lower than Group V and Group C ( p  〈  0.05). Meanwhile, Group E and Group EV obtained the highest comfort level, which was significantly higher than group C ( p  〈  0.05). Fifteen patients developed localized skin erythema after the application of medical Vaseline or EMLA cream and subsided within half an hour after rubbing. Conclusion: EMLA cream is a safe and effective way to alleviate pain during non-coring needle insertion in TIAP and enhance the overall comfort of patients. We recommend applying EMLA cream 1 h before needle insertion of TIAP, especially in patients having needle phobia or high pain scores from previous non-coring needle insertion.
    Type of Medium: Online Resource
    ISSN: 1129-7298 , 1724-6032
    URL: Article
    DOI: 10.1177/11297298231169155
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2079292-X
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  • 3
    Online Resource
    Online Resource
    Study on color ink diffusion in fabrics and color reproduction of digital inkjet printing
    SAGE Publications ; 2022
    In:  Textile Research Journal Vol. 92, No. 19-20 ( 2022-10), p. 3733-3749
    Details
    In: Textile Research Journal, SAGE Publications, Vol. 92, No. 19-20 ( 2022-10), p. 3733-3749
    Abstract: The accuracy of color reproduction of digital printed fabric is affected by fabric structural characteristics and treatment, and the adjustment of color management is required for reducing the color difference. To study the mechanism of color presenting, the interaction of ink droplets diffusing on polyester knitted fabric with different structures and treatment was investigated. The result showed that the smaller the porosity, the larger the diffusion area. Besides that, the pretreatment alleviated the edge blurring of color blocks on fabric, and the diffusion area of hydrophilic finished fabric was larger due to the hydrophilic film. In terms of color presenting, the smaller the porosity, the smaller the K/ S and C* values are, and the pretreatment could have a better effect on color presenting, while the color appeared more pastel on the finished fabric. Due to errors in the process of color transfer, the adjustment of color management in fabric digital inkjet printing was also studied. The manuscript correction method and the ink volume control method were proposed for color management in comparison with the original color management. Through the analysis of color differences, the optimized methods were able to provide an improved color reproduction effect, in which the ink volume control method had the best reproduction effect among the three. The improved color reproduction effect of the ink volume control method on finished fabric was also verified, and the difference of effects between finished fabric and ordinary fabric was explained with the diffusion law of ink droplets.
    Type of Medium: Online Resource
    ISSN: 0040-5175 , 1746-7748
    URL: Article
    DOI: 10.1177/00405175221094046
    RVK:
    ZS 0001
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2022
    detail.hit.zdb_id: 2209596-2
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