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  • SAGE Publications  (8)
  • Chen, Lei  (8)
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  • SAGE Publications  (8)
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  • 1
    Online Resource
    Online Resource
    Endovascular Treatment of the Extracranial Carotid Pseudoaneurysms Resulting From Stab Penetrating Injury Using Overlapping Bare Stents
    SAGE Publications ; 2014
    In:  Vascular and Endovascular Surgery Vol. 48, No. 4 ( 2014-05), p. 337-341
    Details
    In: Vascular and Endovascular Surgery, SAGE Publications, Vol. 48, No. 4 ( 2014-05), p. 337-341
    Abstract: Injury pertaining to the common carotid artery may result in complete or partial arterial transection, pseudoaneurysms, or arteriovenous connections. Endovascular treatment option of the pseudoaneurysm has already been established with favorable success rate and minimal morbidity. Our purpose is to report one 18-year-old male patient having 2 traumatic pseudoaneurysms as a result of penetrating stab injury in the extracranial common carotid. The patient was successfully treated using 2 overlapping bare-metal stents. The 2 common carotid pseudoaneurysms had different degree inflow angles defined as the space between the lines indicating the direction of blood flow from the parent artery and through the aneurysmal neck to the dome. Computed tomography angiography was utilized to follow the evolution of the pseudoaneurysms until total occlusion was demonstrated. The treatment modality used in this report represents an alternative approach of the endovascular treatment for the extracranial carotid pseudoaneurysm.
    Type of Medium: Online Resource
    ISSN: 1538-5744 , 1938-9116
    URL: Article
    DOI: 10.1177/1538574413518613
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2014
    detail.hit.zdb_id: 2095223-5
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  • 2
    Online Resource
    Online Resource
    Multivariate Gaussian process regression for nonlinear modelling with colored noise
    SAGE Publications ; 2019
    In:  Transactions of the Institute of Measurement and Control Vol. 41, No. 8 ( 2019-05), p. 2268-2279
    Details
    In: Transactions of the Institute of Measurement and Control, SAGE Publications, Vol. 41, No. 8 ( 2019-05), p. 2268-2279
    Abstract: Nonlinearity of process systems along with colored noises is common in chemical processes. A multivariate (multiple inputs and multiple outputs) Gaussian process regression (MGPR) modelling approach, which can model multivariate nonlinear processes, is developed in this paper. The developed GPR model considers the Gaussian colored noise, rather than the traditional Gaussian white noise. The colored noise is described by the moving average (MA) model and the autoregressive (AR) model, respectively, with unknown parameters so that a MA-GPR model and an AR-GPR model are developed. These two colored noise based models are further extended to the MGPR model to generate the MA-MGPR model and the AR-MGPR model. The covariance functions of the MA-MGPR model or the AR-MGPR model are formulated with consideration of the autocorrelation of noises. Moreover, all parameters are estimated by using a unidimensional updated particle swarm optimization (PSO) algorithm, simultaneously. Numerical examples as well as a three-level drawing model of Carbon fiber production process are used to demonstrate the effectiveness of the proposed modelling approaches.
    Type of Medium: Online Resource
    ISSN: 0142-3312 , 1477-0369
    URL: Article
    DOI: 10.1177/0142331218798429
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 2025882-3
    SSG: 3,2
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  • 3
    Online Resource
    Online Resource
    Epoxy nanocomposites with carbon nanotubes and montmorillonite: Mechanical properties and electrical insulation
    SAGE Publications ; 2016
    In:  Journal of Composite Materials Vol. 50, No. 24 ( 2016-10), p. 3363-3372
    Details
    In: Journal of Composite Materials, SAGE Publications, Vol. 50, No. 24 ( 2016-10), p. 3363-3372
    Abstract: Multiwalled carbon nanotubes have been widely used as mechanical reinforcement fillers for polymers during the past few decades. However, high electrical conductivity of raw multiwalled carbon nanotubes hampers their application in some fields demanding not only good mechanical properties and/or high thermal conductivity but also electrical insulation. In this research, carboxyl functionalized multiwalled carbon nanotubes and organically modified montmorillonite were introduced to prepare epoxy nanocomposites with anhydride as curing agent. The obtained epoxy nanocomposites possessed improved impact toughness, and the electrical insulation was maintained. Compared to the volume resistivity of the raw multiwalled carbon nanotubes (0.6 wt%)/epoxy nanocomposites, the volume resistivity of the organically modified montmorillonite/carboxyl functionalized multiwalled carbon nanotubes (0.6 wt%)/epoxy nanocomposites increased more than four order of magnitude. These excellent properties were attributed to the synergistic effect of carboxyl functionalized multiwalled carbon nanotubes and organically modified montmorillonite on toughening epoxy, as well as the suppression of electron transport by multiwalled carbon nanotubes surface modification and the organically modified montmorillonite layer in the multiwalled carbon nanotubes conductive network. The effects of adding nanofillers on the dielectric constant and dielectric loss values of epoxy nanocomposites were also studied. This work has demonstrated the feasibility of using multiwalled carbon nanotubes as mechanical reinforcement fillers, while simultaneously giving electrical insulation in the polymer nanocomposites.
    Type of Medium: Online Resource
    ISSN: 0021-9983 , 1530-793X
    URL: Article
    DOI: 10.1177/0021998315620000
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2016
    detail.hit.zdb_id: 160490-9
    detail.hit.zdb_id: 2081924-9
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  • 4
    Online Resource
    Online Resource
    Research on normal ice adhesion strength in icing wind tunnel
    SAGE Publications ; 2023
    In:  Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, SAGE Publications
    Abstract: Aircraft icing seriously jeopardizes flight safety. The design of aircraft anti-icing/de-icing systems requires a thorough understanding of the adhesion between the ice and the substrate. In this research, an experimental device that can be housed within a wing is designed and constructed. Simulation analysis of the interfacial stresses is performed, which reveals that increasing the load and the interface size led to a deterioration in the uniformity of stresses at the interface. In addition, the ice layer does not undergo cohesive damage during the tests. The normal ice adhesion strength is evaluated in an icing wind tunnel using the methodology outlined in this paper. Glaze ice exhibits an increase in normal adhesion strength at lower temperatures, whereas the trend is reversed for rime ice. The minimum adhesion strength occurs near the medium volume diameter (MVD) of 30 µm. Furthermore, the normal strength is significantly enhanced by increase in wind speed and surface roughness, as well as by surface painting. The adhesion strength of aluminum substrates to ice is greater compared to titanium and stainless steel. Compared to shear adhesion strength, normal adhesion strength is less sensitive to various influencing factors. The proposed experimental framework provides precise measurement of normal adhesion strength of impact ice in the icing wind tunnel.
    Type of Medium: Online Resource
    ISSN: 0954-4100 , 2041-3025
    URL: Article
    DOI: 10.1177/09544100231189803
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2032759-6
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  • 5
    Online Resource
    Online Resource
    State feedback spool position control with integral compensation for servo proportional valve
    SAGE Publications ; 2023
    In:  Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
    Details
    In: Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, SAGE Publications
    Abstract: In recent years, servo proportional valves have been widely used in the industry owing to the advantages of high stability and low cost. However, the nonlinearity and parameter uncertainty present in the servo proportional valves make it difficult to control the spool position. This paper proposes a state feedback control with integral compensation for the spool displacement control of the servo proportional valve, which aims to solve the problem that state feedback is difficult to overcome system nonlinearity and parameter uncertainty. The key to this control method is the addition of an outer loop negative feedback and an integral element. At the same time, the control method can realize pole configuration, convenient control parameter adjustment, low hardware requirements, and easy engineering application. Experimental and simulation results show that the integral element can compensate for the system’s nonlinearities and uncertain parameters, and eliminate the steady-state error of displacement tracking. The state feedback with integral compensation can improve the frequency response of the servo proportional valve compared to traditional PID control.
    Type of Medium: Online Resource
    ISSN: 0954-4062 , 2041-2983
    URL: Article
    DOI: 10.1177/09544062231158943
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2024890-8
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  • 6
    Online Resource
    Online Resource
    Synthesis and characterization of ternary copolyimides derived from aromatic dianhydride and aromatic diisocyanates
    SAGE Publications ; 2014
    In:  High Performance Polymers Vol. 26, No. 5 ( 2014-08), p. 598-608
    Details
    In: High Performance Polymers, SAGE Publications, Vol. 26, No. 5 ( 2014-08), p. 598-608
    Abstract: A series of polyimide (PI) copolymers were synthesized via a one-step polycondensation procedure from benzophenone-3,3′,4,4′-tetracarboxylic acid dianhydride, toluene diisocyanate (TDI), and 4,4′-methylene bis(phenyl isocyanate) (MDI) with various mole ratios of TDI and MDI ranging from 70:30 to 100:0. The inherent viscosities of the resulting PIs were in the range of 0.51–0.80 dL g −1 . The prepared PIs showed good solubility in common organic as well as in less polar solvents. All copolymers afforded tough and flexible films that had good thermal stability with glass transition temperature of 308–325°C and the temperatures of 5% weight loss in air and nitrogen being 420 and 460°C, respectively. The resultant PI films with thickness about 15 μm exhibited high transparency ( 〉 88%) in visible region (400–700 nm). Also, the cured PI films possessed good mechanical properties with tensile strength of 60.52–69.31 MPa and tensile modulus of 0.98–1.30 GPa.
    Type of Medium: Online Resource
    ISSN: 0954-0083 , 1361-6412
    URL: Article
    DOI: 10.1177/0954008314524462
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2014
    detail.hit.zdb_id: 1483713-4
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  • 7
    Online Resource
    Online Resource
    Sensing with Mobile Wireless Sensor Networks
    SAGE Publications ; 2014
    In:  International Journal of Distributed Sensor Networks Vol. 10, No. 12 ( 2014-12-01), p. 936830-
    Details
    In: International Journal of Distributed Sensor Networks, SAGE Publications, Vol. 10, No. 12 ( 2014-12-01), p. 936830-
    Type of Medium: Online Resource
    ISSN: 1550-1477 , 1550-1477
    URL: Article
    DOI: 10.1155/2014/936830
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2014
    detail.hit.zdb_id: 2192922-1
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  • 8
    Online Resource
    Online Resource
    Efficacy of Drug-Eluting Beads Transarterial Chemoembolization Plus Camrelizumab Compared With Conventional Transarterial Chemoembolization Plus Camrelizumab for Unresectable Hepatocellular Carcinoma
    SAGE Publications ; 2022
    In:  Cancer Control Vol. 29 ( 2022-01), p. 107327482210768-
    Details
    In: Cancer Control, SAGE Publications, Vol. 29 ( 2022-01), p. 107327482210768-
    Abstract: The purpose of this study was to compare the efficacy and safety of drug-eluting beads transarterial chemoembolization plus camrelizumab (D-TACE-C) with conventional transarterial chemoembolization plus camrelizumab (C-TACE-C) in the treatment of patients with unresectable hepatocellular carcinoma (HCC). Materials and Methods This was a retrospective study that evaluated the consecutive medical records of patients with unresectable HCC who had undergone D-TACE-C or C-TACE-C from April 2020 to August 2021. Efficacy of treatment was evaluated using tumor response, progression-free survival (PFS) and survival rates. The adverse events were recorded. Results A total of 54 patients were included in this study, including 27 patients who had received D-TACE-C treatment, and 27 patients who had received C-TACE-C treatment. The median PFS and DCR in the D-TACE-C group were significantly longer than those for the C-TACE-C group (PFS: 10 vs. 3 months, P=.017; DCR: 70.4% vs. 40.7%, P = .028). Cox regression analysis showed that D-TACE-C was the only protective factor for PFS. The 6-month and 12-month survival rates in D-TACE-C group and C-TACE-C group were 85.2% versus 79.4% (P = .646) and 65.2% versus 65.1% (P = .903), respectively. Reactive cutaneous capillary endothelial proliferation was the most common adverse event associated with the treatment. There was no significant difference in the adverse events related to TACE and camrelizumab between the two groups. No treatment-related deaths occurred in this study. Conclusions D-TACE-C is a safe and well-tolerated treatment, and may produce better PFS and tumor response in patients with unresectable HCC than C-TACE-C.
    Type of Medium: Online Resource
    ISSN: 1073-2748 , 1526-2359
    URL: Article
    DOI: 10.1177/10732748221076806
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2022
    detail.hit.zdb_id: 2004182-2
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