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  • SAGE Publications  (54)
  • 1
    Online Resource
    Online Resource
    SAGE Publications ; 2019
    In:  Advances in Mechanical Engineering Vol. 11, No. 1 ( 2019-01), p. 168781401880610-
    In: Advances in Mechanical Engineering, SAGE Publications, Vol. 11, No. 1 ( 2019-01), p. 168781401880610-
    Abstract: The quality of heavy-duty machine tool foundations can drastically affect the operating life and working precision of the tool, and the high cost of manufacture has drawn a lot of attention. This article summarized the research status of the relevant literature on the characteristics, vibration isolation, foundation optimization, and quality inspection of heavy-duty machine tool-foundation system, induced the influencing laws of the influencing factors of the system, reviewed the highlights and achievements in the research of heavy machine tool-foundation system at present, and put forward some problems and development directions existing in the research of heavy machine tool-foundation system. It lays a foundation for realizing the judgment of the concrete foundation quality and improving the processing precision and the maintenance of the heavy machine tool.
    Type of Medium: Online Resource
    ISSN: 1687-8140 , 1687-8140
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 2501620-9
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  • 2
    Online Resource
    Online Resource
    SAGE Publications ; 2021
    In:  Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering Vol. 235, No. 6 ( 2021-07), p. 735-750
    In: Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, SAGE Publications, Vol. 235, No. 6 ( 2021-07), p. 735-750
    Abstract: In this study, the problem of finite-time stability and boundedness for parabolic singular distributed parameter systems in the sense of [Formula: see text] norm is investigated. First, two new results on [Formula: see text] norm-based finite-time stability and finite-time boundedness for above-mentioned systems, inspired by the light of partial differential equations theory and Lyapunov functional method, are presented. Then, some sufficient conditions of [Formula: see text] norm-based finite-time stability and boundedness are established by virtue of differential inequalities and linear matrix inequalities. Furthermore, the distributed state feedback controllers are constructed to guarantee the [Formula: see text] norm-based finite-time stable and bounded of the closed-loop singular distributed parameter systems. Finally, numerical simulations on a specific numerical example and the building temperature control system equipped with air conditioning are given to demonstrate the validity of the proposed methods.
    Type of Medium: Online Resource
    ISSN: 0959-6518 , 2041-3041
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2024903-2
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  • 3
    Online Resource
    Online Resource
    SAGE Publications ; 2022
    In:  Journal of Vibration and Control Vol. 28, No. 11-12 ( 2022-06), p. 1324-1340
    In: Journal of Vibration and Control, SAGE Publications, Vol. 28, No. 11-12 ( 2022-06), p. 1324-1340
    Abstract: In this article, an adaptive boundary iterative learning vibration control is developed for a class of the rigid–flexible manipulator system under distributed disturbances and input constraints. With the help of the virtual work principle, the dynamics of the rigid–flexible manipulator are modeled and described by coupled ordinary differential equations and partial differential equations. Based on the original infinite dimension system model, three compounded adaptive boundary iterative learning vibration control laws are constructed with disturbance observers and adaptive vibration laws, aiming to track the desired joint angular positions and achieve vibration suppression simultaneously. Three disturbance observers are proposed to determine the upper bounded approximation of the unknown external disturbances. Hyperbolic tangent and saturation functions are incorporated into adaptive vibration laws to handle input constraints. It is proved by Lyapunov–Krasovskii-like composite energy functions that elastic vibrations and tracking errors can asymptotically converge to zero along the iteration axis. Finally, the efficacy of the developed adaptive boundary iterative learning vibration control approach is illustrated by the simulation results under distributed disturbances and input constraints.
    Type of Medium: Online Resource
    ISSN: 1077-5463 , 1741-2986
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2022
    detail.hit.zdb_id: 2070247-4
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  • 4
    Online Resource
    Online Resource
    SAGE Publications ; 2018
    In:  Technology in Cancer Research & Treatment Vol. 17 ( 2018-01), p. 153303461875678-
    In: Technology in Cancer Research & Treatment, SAGE Publications, Vol. 17 ( 2018-01), p. 153303461875678-
    Type of Medium: Online Resource
    ISSN: 1533-0338 , 1533-0338
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2018
    detail.hit.zdb_id: 2146365-7
    detail.hit.zdb_id: 2220436-2
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  • 5
    Online Resource
    Online Resource
    SAGE Publications ; 2017
    In:  Integrative Cancer Therapies Vol. 16, No. 4 ( 2017-12), p. 556-562
    In: Integrative Cancer Therapies, SAGE Publications, Vol. 16, No. 4 ( 2017-12), p. 556-562
    Abstract: Most of the present anticancer drugs are highly cytotoxic and focus mainly on killing tumor cells rather than slowing the progress of cancer metastasis. Evidence has been reported that bridges the mechanisms of inflammation and tumor invasion. Therefore, we evaluated the potency in cancer metastasis chemoprevention of compounds and a coumarin extracted from Murraya exotica, which is known for its anti-inflammation bioactivity. By carrying out experiments in vitro, we found the root extracts more efficient than the leaf extracts in restraining cell migration of MDA-MB-231 cells, while leaf extracts presented slightly stronger inhibition of tumor cell adhesion at low concentrations. In addition, compared to root extracts, a novel coumarin identified previously from root extracts showed equal inhibition on cancer cell adhesion and less inhibition on cell migration. All extracts used in this study presented low cytotoxicity in vitro. Through comparison of the contents of leaf and root extracts from M exotica, several compounds are considered promising against cancer metastasis. This study evaluates the worth of further development of M exotica to find its effect on cancer metastasis chemoprevention.
    Type of Medium: Online Resource
    ISSN: 1534-7354 , 1552-695X
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2017
    detail.hit.zdb_id: 2101248-9
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  • 6
    In: Journal of Orthopaedic Surgery, SAGE Publications, Vol. 25, No. 2 ( 2017-05), p. 230949901771393-
    Type of Medium: Online Resource
    ISSN: 2309-4990 , 2309-4990
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2017
    detail.hit.zdb_id: 2128854-9
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  • 7
    In: International Journal of Social Psychiatry, SAGE Publications, Vol. 67, No. 6 ( 2021-09), p. 622-631
    Abstract: Self-stigma exerts a range of adversities for persons with severe mental illness (SMI), however, little is known about the association between peer contact, social support and self-stigma. Aims: This study aimed to explore the mediating role of social support on the relationship between peer contact and self-stigma among persons with SMI in Hong Kong. Methods: A total of 159 persons with SMI (schizophrenia and mood disorder) in community service centres participated in the study through completing a survey on self-stigma, social functioning, social support, perception of peer contact and mass media. Logistic regression was utilised to explore the influencing factors of self-stigma among the participants. Results: The results showed that 81.1% of participants reported moderate to severe levels of self-stigma. Self-stigma was significantly associated with diverse factors (e.g. social functioning). Importantly, positive peer contact was significantly associated with lower self-stigma of persons with SMI. Social support acted as a mediator between peer contact and self-stigma. Conclusion: The results of this study suggest that contact-based interventions, such as enhancing positive peer-to-peer contact, should be conducted for reducing self-stigma among persons with SMI.
    Type of Medium: Online Resource
    ISSN: 0020-7640 , 1741-2854
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2021
    detail.hit.zdb_id: 2066492-8
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  • 8
    In: Therapeutic Advances in Respiratory Disease, SAGE Publications, Vol. 13 ( 2019-01), p. 175346661988812-
    Abstract: Sepsis and septic shock are common in noninvasive ventilation (NIV) patients. However, studies on the association between sepsis and NIV failure are lacking. Methods: A prospective multi-center observational study was performed in 16 Chinese intensive care units (ICUs). Patients who used NIV due to hypoxemic respiratory failure were enrolled. Sepsis and septic shock were diagnosed according to the guideline of sepsis-3. Results: A total of 519 patients were enrolled. Sepsis developed in 365 patients (70%) and septic shock developed in 79 patients (15%). However, 75 patients (14%) had no sepsis. NIV failure was 23%, 38%, and 61% in patients, with no sepsis, sepsis, and septic shock, respectively. Multivariate analysis found that sepsis [odds ratio (OR) = 1.95, 95% confidence interval (CI): 1.06–3.61] and septic shock (OR = 2.47, 95% CI: 1.12–5.45) were independently associated with NIV failure. In sepsis and septic shock population, the NIV failure was 13%, 31%, 37%, 53%, and 67% in patients with sequential organ failure assessment (SOFA) scores of ⩽2, 3–4, 5–6, 7–8, and ⩾9, respectively. Patients with nonpulmonary induced sepsis had similar NIV failure rate compared with those with pulmonary induced sepsis, but had higher proportion of septic shock (37% versus 10%, p ⩽ 0.01) and lower ICU mortality (10% versus 22%, p ⩽ 0.01). Conclusions: Sepsis was associated with NIV failure in patients with hypoxemic respiratory failure, and the association was stronger in septic shock patients. NIV failure increased with the increase of organ dysfunction caused by sepsis. The reviews of this paper are available via the supplemental material section.
    Type of Medium: Online Resource
    ISSN: 1753-4666 , 1753-4666
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2019
    detail.hit.zdb_id: 2387506-9
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  • 9
    Online Resource
    Online Resource
    SAGE Publications ; 2016
    In:  Journal of Dental Research Vol. 95, No. 4 ( 2016-04), p. 380-387
    In: Journal of Dental Research, SAGE Publications, Vol. 95, No. 4 ( 2016-04), p. 380-387
    Abstract: Self-assembled nanolayering structures have been reported in resin-dentin interfaces created by adhesives that contain 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP). These structures have been hypothesized to contribute to bond durability. The objective of the present study was to determine the extent of nanolayering in resin-dentin interfaces after application of commercialized 10-MDP-containing self-etch and universal adhesives to human dentin. Seven commercialized adhesives were examined: Adhese Universal (Ivoclar-Vivadent), All-Bond Universal (Bisco, Inc.), Clearfil SE Bond 2, Clearfil S3 Bond Plus, Clearfil Universal Bond (all from Kuraray Noritake Dental Inc.), G-Premio Bond (GC Corp.), and Scotchbond Universal (3M ESPE). Each adhesive was applied in the self-etch mode on midcoronal dentin according to the respective manufacturer’s instructions. Bonded specimens ( n = 6) were covered with flowable resin composite, processed for transmission electron microscopy, and examined at 30 random sites without staining. Thin-film glancing angle X-ray diffraction (XRD) was used to detect the characteristic peaks exhibited by nanolayering ( n = 4). The control consisted of 15%wt, 10%wt, and 5%wt 10-MDP (DM Healthcare Products, Inc.) dissolved in a mixed solvent (ethanol and water weight ratio 9:8, with photoinitiators). Experimental primers were applied to dentin for 20 s, covered with hydrophobic resin layer, and examined in the same manner. Profuse nanolayering with highly ordered periodicity (~3.7 nm wide) was observed adjacent to partially dissolved apatite crystallites in dentin treated with the 15% 10-MDP primer. Three peaks in the 2θ range of 2.40° (3.68 nm), 4.78° (1.85 nm), and 7.18° (1.23 nm) were identified from thin-film XRD. Reduction in the extent of nanolayering was observed in the 10% and 5% 10-MDP experimental primer-dentin interface along with lower intensity XRD peaks. Nanolayering and characteristic XRD peaks were rarely observed in specimens prepared from the commercialized adhesives. The sparsity of nanolayering in resin-dentin interfaces created by commercialized adhesives challenges its clinical effectiveness as a mechanism for improving bond longevity in dentin bonding.
    Type of Medium: Online Resource
    ISSN: 0022-0345 , 1544-0591
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2016
    detail.hit.zdb_id: 2057074-0
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  • 10
    In: Therapeutic Advances in Respiratory Disease, SAGE Publications, Vol. 14 ( 2020-01), p. 175346662097737-
    Abstract: Various prediction indices based on the single time point observation have been proposed in chronic obstructive pulmonary disease (COPD), but little was known about disease trajectory as a predictor of future exacerbations. Our study explored the association between disease trajectory and future exacerbations, and validated the predictive value of the modified and simplified short-term clinically important deterioration (CID). Methods: This study was a multicenter, prospective observational study. Patients with COPD were recruited into our study and followed up for 18 months. The modified CID (CID-C) was defined as a decrease of 100 mL in forced expiratory volume in 1 second (FEV1), or suffering exacerbations, or increase of 2 units in COPD Assessment Test (CAT) during the first 6 months follow-up. Simplified CID was defined when excluding CAT from the CID-C model. Results: A total of 127 patients were enrolled in our final analysis. Compared with patients without exacerbations during the period of the 6th to the 18th month, patients with exacerbations were more likely to have frequent short-term exacerbations in the first 6 months (2.14 versus 0.21, p  〈  0.001). The short-term exacerbations were the best predictor for future exacerbations [odds ratio (OR): 13.25; 95% confidence interval: 5.62–34.67; p  〈  0.001], followed by the history of exacerbation before study entry, short-term changes in FEV1 and CAT. CID-C and Simplified CID were both significantly associated with exacerbations (OR: 7.14 and 9.74, both p  〈  0.001). The receiver operating characteristic curves showed that the Simplified CID had slightly better predictive capacity for future exacerbation than CID-C (0.754 versus 0.695, p = 0.02). Conclusion: Disease trajectory, including both the CID-C and the Simplified CID had significant predictive value for future exacerbations. The reviews of this paper are available via the supplemental material section.
    Type of Medium: Online Resource
    ISSN: 1753-4666 , 1753-4666
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2020
    detail.hit.zdb_id: 2387506-9
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