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  • SAGE Publications  (11)
  • 1
    Online Resource
    Online Resource
    Modelling and experimental evaluation of a variable stiffness MR suspension with self-powering capability
    SAGE Publications ; 2021
    In:  Journal of Intelligent Material Systems and Structures Vol. 32, No. 13 ( 2021-08), p. 1473-1483
    Details
    In: Journal of Intelligent Material Systems and Structures, SAGE Publications, Vol. 32, No. 13 ( 2021-08), p. 1473-1483
    Abstract: This paper presents the modelling and experimental evaluation of a semi-active vehicle suspension installed with a self-powered MR damper which is able to perform variable stiffness. Its variable stiffness feature as well as the self-powering capability was evaluated and verified using a hydraulic Instron test system. The testing results show that the stiffness of the damper is dependent on the current which can be generated by the self-powering component. A mathematic model was established to describe the dynamic properties of the MR damper and its power-generating capability. Finally, the self-powered MR suspension was installed on a quarter car test rig for its vibration isolation evaluation. A controller based on the short-time Fourier transform (STFT) was developed for the stiffness control. The evaluation result illustrates that the proposed MR damper can reduce the acceleration and displacement of the sprung mass by 16.8% and 21.4% respectively, compared with the passive system.
    Type of Medium: Online Resource
    ISSN: 1045-389X , 1530-8138
    URL: Article
    DOI: 10.1177/1045389X20986994
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2088313-4
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  • 2
    Online Resource
    Online Resource
    Influence of hot water dip on fruit quality, phenolic compounds and antioxidant capacity of Satsuma mandarin during storage
    SAGE Publications ; 2013
    In:  Food Science and Technology International Vol. 19, No. 6 ( 2013-12), p. 511-521
    Details
    In: Food Science and Technology International, SAGE Publications, Vol. 19, No. 6 ( 2013-12), p. 511-521
    Abstract: The influence of hot water dips (50, 52 and 54 ℃ for 3 min) on fruit quality, phenolic compounds and antioxidant capacity of Satsuma mandarin during 60 days’ storage at 10 ℃ was investigated. Hot water dips did not affect fruit quality attributes as well as ascorbic acid content, and 50 ℃ treatment significantly reduced fruit weight loss. Significant increases of flavonoids were found in all hot water treated fruit from after treatments till 15 days of storage, whereas phenolic acids were not greatly affected. Hot water dipping at 50 ℃ significantly increased total phenolics and antioxidant capacity of Satsuma mandarin immediately after treatment and maintained similar levels with control during storage, while 52 and 54 ℃ treatments showed relatively lower levels. The results suggested that hot water dipping at 50 ℃ for 3 min can be a promising way to retain functional quality of storing Satsuma mandarin.
    Type of Medium: Online Resource
    ISSN: 1082-0132 , 1532-1738
    URL: Article
    DOI: 10.1177/1082013212457669
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2013
    detail.hit.zdb_id: 2081257-7
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  • 3
    Online Resource
    Online Resource
    Long Noncoding RNA KCNMB2-AS1 Stabilized by N 6 -Methyladenosine Modification Promotes Cervical Cancer Growth Through Acting as a Competing Endogenous RNA
    SAGE Publications ; 2020
    In:  Cell Transplantation Vol. 29 ( 2020-01-01), p. 096368972096438-
    Details
    In: Cell Transplantation, SAGE Publications, Vol. 29 ( 2020-01-01), p. 096368972096438-
    Abstract: Long noncoding RNA (lncRNA) is emerging as an essential regulator in the development and progression of cancer, including cervical cancer (CC). In this study, we found a CC-related lncRNA, KCNMB2-AS1, which was significantly overexpressed in CC and linked to poor outcomes. Depletion of KCNMB2-AS1 remarkably inhibited CC cell proliferation and induced apoptosis. In vivo xenograft models revealed that knockdown of KCNMB2-AS1 evidently delayed tumor growth. Mechanistically, KCNMB2-AS1 was predominantly located in the cytoplasm and served as a competing endogenous RNA to abundantly sponge miR-130b-5p and miR-4294, resulting in the upregulation of IGF2BP3, a well-documented oncogene in CC. Moreover, IGF2BP3 was able to bind KCNMB2-AS1 by three N 6 -methyladenosine (m 6 A) modification sites on KCNMB2-AS1, in which IGF2BP3 acted as an m 6 A “reader” and stabilized KCNMB2-AS1. Thus, KCNMB2-AS1 and IGF2BP3 formed a positive regulatory circuit that enlarged the tumorigenic effect of KCNMB2-AS1 in CC. Together, our data clearly suggest that KCNMB2-AS1 is a novel oncogenic m 6 A-modified lncRNA in CC, targeting KCNMB2-AS1 and its related molecules implicate the therapeutic possibility for CC patients.
    Type of Medium: Online Resource
    ISSN: 0963-6897 , 1555-3892
    URL: Article
    DOI: 10.1177/0963689720964382
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
    detail.hit.zdb_id: 2020466-8
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  • 4
    Online Resource
    Online Resource
    Innovative variable stiffness and variable damping magnetorheological actuation system for robotic arm positioning
    SAGE Publications ; 2023
    In:  Journal of Intelligent Material Systems and Structures Vol. 34, No. 2 ( 2023-01), p. 123-137
    Details
    In: Journal of Intelligent Material Systems and Structures, SAGE Publications, Vol. 34, No. 2 ( 2023-01), p. 123-137
    Abstract: Overshoot and long settling time are two common problems of the positioning control for robotic arms. To solve the positioning control problems, an innovative variable stiffness and variable damping (VSVD) magnetorheological (MR) actuation system for robotic arms was designed, prototyped and evaluated in this paper. The system can reduce the overshoot and settling time of the robotic arm with less energy consumption by controlling the stiffness and damping of its VSVD unit. A robotic arm with the VSVD actuation system was developed and prototyped. In order to evaluate the performance of the system, a step route and a customised route were designed for the robotic arm system to trace. Under these two routes, the positioning control performances of the VSVD robotic arm were evaluated numerically and experimentally with the control modes of uncontrolled, VD, VS and VSVD, respectively. Both the numerical and experimental results demonstrated that the VSVD control mode works best in general with less overshoot, settling time and energy consumption, indicating that the proposed VSVD actuation system can serve as a good candidate to solve the positioning control problems of robotic arms.
    Type of Medium: Online Resource
    ISSN: 1045-389X , 1530-8138
    URL: Article
    DOI: 10.1177/1045389X221099453
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2088313-4
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  • 5
    Online Resource
    Online Resource
    Analysis of Network Security Data Using Wavelet Transforms
    SAGE Publications ; 2014
    In:  Journal of Algorithms & Computational Technology Vol. 8, No. 1 ( 2014-03), p. 59-70
    Details
    In: Journal of Algorithms & Computational Technology, SAGE Publications, Vol. 8, No. 1 ( 2014-03), p. 59-70
    Abstract: Data Analysis of Network Security is very important in intrusion detection and computer forensics. A lot of data mining methods to research it have been found, such as content-based queries and similarity searches to manage and use such data. Fast and accurate retrievals for content-based queries are crucial for such numerous data streams to be useful. In this paper, we apply wavelet transforms into network security to analyze and mine time-serial data streams for the detection of anomalous network security events. We first proposes a wavelet based data analysis framework for network security traffic, and signalize the data stream of network security (DSNS), then after de-noise of DSNS, we use wavelet based transforms to analyze the DSNS and get anomalous events for intrusion detection in computer network security. Experimental results show that, by using wavelet transform, we can decrease the noise signal and keep the useful signals of network security data streams to retrieve anomalous events effectively.
    Type of Medium: Online Resource
    ISSN: 1748-3026 , 1748-3026
    URL: Article
    DOI: 10.1260/1748-3018.8.1.59
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2014
    detail.hit.zdb_id: 2478205-1
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  • 6
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    An active seat suspension design for vibration control of heavy-duty vehicles
    SAGE Publications ; 2016
    In:  Journal of Low Frequency Noise, Vibration and Active Control Vol. 35, No. 4 ( 2016-12), p. 264-278
    Details
    In: Journal of Low Frequency Noise, Vibration and Active Control, SAGE Publications, Vol. 35, No. 4 ( 2016-12), p. 264-278
    Abstract: This paper presents the design, fabrication and testing of an innovative active seat suspension system for heavy-duty vehicles. Rather than using conventional linear actuators, such as hydraulic cylinders or linear motors, which need to be well maintained and are always expensive when high force outputs are required, the proposed seat suspension system directly applies a rotary motor in order to provide the required active actuation, without changing the basic structure of the existing off-the-shelf seat suspension. A gear reducer is also applied to amplify the output torque of the motor so that a high output torque can be achieved using a low rated power motor. A static output feedback [Formula: see text] controller with friction compensation is designed to actively reduce seat vibration. Experiments are carried out to test the fabricated suspension prototype. The experimental results show that this type of seat suspension can achieve greater ride comfort in the frequency range of 2–6 Hz than a passive seat suspension. The newly designed active seat suspension is much more cost effective and can be suitable for heavy-duty vehicles.
    Type of Medium: Online Resource
    ISSN: 1461-3484 , 2048-4046
    URL: Article
    DOI: 10.1177/0263092316676389
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2016
    detail.hit.zdb_id: 2025887-2
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  • 7
    Online Resource
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    Experimental testing and modelling of a rotary variable stiffness and damping shock absorber using magnetorheological technology
    SAGE Publications ; 2019
    In:  Journal of Intelligent Material Systems and Structures Vol. 30, No. 10 ( 2019-06), p. 1453-1465
    Details
    In: Journal of Intelligent Material Systems and Structures, SAGE Publications, Vol. 30, No. 10 ( 2019-06), p. 1453-1465
    Abstract: This article presents a novel rotary shock absorber which combines the abilities of variable stiffness and variable damping by assembling a set of two magnetorheological damping units, one of which being placed in series with a rubber spring. This allows the damping and stiffness to be controlled independently by the internal damping and the external damping units, respectively. A test bench was established to verify the variable stiffness and damping functionality. The experimental results for variable damping test, variable stiffness test and co-working test are presented. At the amplitude of 10° and the frequency 0.5 Hz, increases of 141.6% and 618.1% are obtained for damping and stiffness separately if the corresponding current increased from 0 to 1 A and from 0 to 2 A, respectively. A mathematical model is then developed and verified to predict the changing of the damping and stiffness. The test results and the simulated model confirm the feasibility of the shock absorber with the ability of varying damping and stiffness simultaneously.
    Type of Medium: Online Resource
    ISSN: 1045-389X , 1530-8138
    URL: Article
    DOI: 10.1177/1045389X19835955
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 2088313-4
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  • 8
    Online Resource
    Online Resource
    A magnetorheological elastomer rail damper for wideband attenuation of rail noise and vibration
    SAGE Publications ; 2020
    In:  Journal of Intelligent Material Systems and Structures Vol. 31, No. 2 ( 2020-01), p. 220-228
    Details
    In: Journal of Intelligent Material Systems and Structures, SAGE Publications, Vol. 31, No. 2 ( 2020-01), p. 220-228
    Abstract: The noise and vibration effects of rails can have a significant impact on the environment surrounding the railways. Rail dampers are elements that are attached to the sides of the rail and can improve the track decay rate of rail and then enhance the rails’ ability to attenuate noises and vibrations. However, in practical applications, the most efficient rail damper design still cannot adjust its own parameters to adapt to different requirements because their stiffness and damping are fixed after designed. In this work, a tunable magnetorheological elastomer rail damper that works on the principle of a dynamic vibration absorber has been designed, analysed, characterised, and experimentally tested for the suppression of railway noise and vibration. The new rail damper incorporates variable stiffness magnetorheological elastomer layers, whose stiffness can be controlled by an externally applied magnetic field, to realise adaptive characteristics. Experimental characterisations of the magnetorheological elastomer rail damper were performed with an electromagnetic shaker. Subsequently, theoretical predictions of the track decay rate of a UIC-60 rail with different rail dampers and without rail damper were conducted; simulation results verified that magnetorheological elastomer rail dampers can improve the track decay rate of rail over a wider frequency range compared to conventional rail dampers and thus the performance of the magnetorheological elastomer rail damper outperforms other conventional rail dampers on rail noise reduction.
    Type of Medium: Online Resource
    ISSN: 1045-389X , 1530-8138
    URL: Article
    DOI: 10.1177/1045389X19873406
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
    detail.hit.zdb_id: 2088313-4
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  • 9
    Online Resource
    Online Resource
    The variable resonance magnetorheological pendulum tuned mass damper: Mathematical modelling and seismic experimental studies
    SAGE Publications ; 2020
    In:  Journal of Intelligent Material Systems and Structures Vol. 31, No. 2 ( 2020-01), p. 263-276
    Details
    In: Journal of Intelligent Material Systems and Structures, SAGE Publications, Vol. 31, No. 2 ( 2020-01), p. 263-276
    Abstract: Tuned mass damper technologies are progressively advancing through innovative application of smart materials, facilitating more versatile infrastructure protection. During seismic events, primarily encountered surrounding fault lines, high-rise buildings and other civil structures can suffer catastrophic failures if not adequately protected. Where traditional passive structural protection may mitigate such damage, adaptive systems which provide controllable vibration attenuation across a wide range of excitation frequencies have seen growth in use, overcoming the challenges resulting from unpredictable seismic spectrums. As a robust solution to this problem, this article presents and analyses a variable resonance magnetorheological-fluid-based pendulum tuned mass damper which employs a rotary magnetorheological damper in a controllable differential transmission to add stiffness to a swinging pendulum mass. The device is mathematically modelled based on magnetic field analysis, the Bingham plastic shear-stress model for magnetorheological fluids, and planetary gearbox kinematic and torque relationships, with the model then being validated against experimental data. The passive and semi-active-controlled performance of the device in seismic vibration suppression is then experimentally investigated using a scale five-storey building. In tests conducted with the 1985 Mexico City record, the semi-active device outperformed the (optimal) passive-on tuning, at best reducing peak displacement by 15.47% and acceleration by 28.28%, with similar improvement seen against the passive-off case for the 1940 El Centro record.
    Type of Medium: Online Resource
    ISSN: 1045-389X , 1530-8138
    URL: Article
    DOI: 10.1177/1045389X19888799
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
    detail.hit.zdb_id: 2088313-4
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  • 10
    Online Resource
    Online Resource
    Integrated active and semi-active control for seat suspension of a heavy duty vehicle
    SAGE Publications ; 2018
    In:  Journal of Intelligent Material Systems and Structures Vol. 29, No. 1 ( 2018-01), p. 91-100
    Details
    In: Journal of Intelligent Material Systems and Structures, SAGE Publications, Vol. 29, No. 1 ( 2018-01), p. 91-100
    Abstract: In this article, an integrated active and semi-active seat suspension for heavy duty vehicles is proposed, and its prototype is built; an integrated control algorithm applied measurable variables (suspension relative displacement and seat acceleration) is designed for the proposed seat prototype. In this seat prototype, an active actuator with low maximum force output (70 N), which is insufficient for an active seat suspension to control the resonance vibration, is applied together with a rotary magnetorheological damper. The magnetorheological damper can suppress the high vibration energy in resonance frequency, and then a small active force can further improve the seat suspension performance greatly. The suspension’s dynamic property is tested with a MTS system, and its model is identified based on the testing data. A modified on–off controller is applied for the rotary magnetorheological damper. A [Formula: see text] controller with the compensation of a disturbance observer is used for the active actuator. Considering the energy saving, the control strategy is designed as that only when the magnetorheological damper is in the off state (0 A current), the active actuator will have active force output, or the active actuator is off. Both simulation and experiment are implemented to verify the proposed seat suspension and controller. In the sinusoidal excitations experiment, the acceleration transmissibility of integrated control seat has lowest value in resonance frequency and frequencies above the resonance, when compared with power on (0.7 A current), power off (0 A current) and semi-active control seat. In the random vibration experiment, the root mean square acceleration of integrated control seat suspension has 47.7%, 33.1% and 26.5% reductions when compared with above-mentioned three kinds of seat suspension. The power spectral density comparison indicates that the integrated seat suspension will have good performance in practical application. The integrated active and semi-active seat suspension can fill energy consumption gap between active and semi-active control seat suspension.
    Type of Medium: Online Resource
    ISSN: 1045-389X , 1530-8138
    URL: Article
    DOI: 10.1177/1045389X17721032
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2018
    detail.hit.zdb_id: 2088313-4
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