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  1. Article: Structural performance of detachable precast concrete column-column joint.

    Zhan, H / Ye, M / Jiang, J / Gao, Y / Zheng, C W / Duan, S C

    Heliyon

    2024  Volume 10, Issue 5, Page(s) e27308

    Abstract: A novel type of detachable precast concrete column-column joint (DPC) is proposed in this study to solve the problems in current column-column dry connections including complex load path, uncertainty of structural stiffness of beam-column joints and ... ...

    Abstract A novel type of detachable precast concrete column-column joint (DPC) is proposed in this study to solve the problems in current column-column dry connections including complex load path, uncertainty of structural stiffness of beam-column joints and inconvenience for disassembly. The dry connection technology is applied by composing of steel plate and concrete. Finite element models of DPC were created to study its structural performance including hysteresis curve, skeleton curve, ductility, and energy dissipation capacity. The benchmark models are firstly established and validated against the test data and after that a small-scale parametric study is prepared. The effect of axial pressure ratio and eccentricity distance size on the seismic performance of DPC was studied. Results indict that the optimal value of axial pressure ratio ranges from 0.5 to 0.7. With increase of the axial pressure ratio, the ductility coefficient shows a decreasing trend in general. The eccentricity has little effect on the energy dissipation capacity of the joint.
    Language English
    Publishing date 2024-03-05
    Publishing country England
    Document type Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2024.e27308
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Propagation Route and Speed of Swell in the Indian Ocean

    Zheng, C. W. / Li, C. Y. / Pan, J.

    Journal of geophysical research. 2018 Jan., v. 123, no. 1

    2018  

    Abstract: The characteristics of swell propagation play an important role in the forecasting of ocean waves as well as on research on global climate change, wave energy development, and disaster prevention and reduction. To reveal the propagation routes, terminal ... ...

    Abstract The characteristics of swell propagation play an important role in the forecasting of ocean waves as well as on research on global climate change, wave energy development, and disaster prevention and reduction. To reveal the propagation routes, terminal targets and speeds of swells that originate from the southern Indian Ocean westerly (SIOW), an intraseasonal swell index (SI) was defined based on the 45 year (September 1957 to August 2002) ERA‐40 wave reanalysis data product from the European Center for Medium‐Range Weather Forecasts (ECMWF). The results show that the main body of the SIOW‐related swells typically spread to the waters off Sri Lanka and Christmas Island, while the branches spread to the Arabian Sea and other waters. The propagation speeds of swells originated in the SIOW were fastest in May and August, followed by November, and were slowest in February. Swells usually required 4–6 days to propagate from the western part of the SIOW to the waters off Sri Lanka and Christmas Island, whereas swells usually required 2–4 days to propagate from the eastern part of the SIOW to the waters off Christmas Island.
    Keywords climate change ; disaster preparedness ; geophysics ; research ; water power ; Arabian Sea ; Indian Ocean ; Sri Lanka
    Language English
    Dates of publication 2018-01
    Size p. 8-21.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 161667-5
    ISSN 2169-9291 ; 2169-9275 ; 0148-0227 ; 0196-2256
    ISSN (online) 2169-9291
    ISSN 2169-9275 ; 0148-0227 ; 0196-2256
    DOI 10.1002/2016JC012585
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 2004/712: Show issues
    Z 2004/710: Show issues

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  3. Article: Propagation characteristic and intraseasonal oscillation of the swell energy of the Indian Ocean

    Zheng, C.W / C.Y. Li

    Applied energy. 2017 July 01, v. 197

    2017  

    Abstract: The propagation characteristics of swell energy are important for applications such as swell wave power generation, ocean wave forecasting, disaster prevention and reduction, etc. However, the study on the propagation of swell energy is still relatively ... ...

    Abstract The propagation characteristics of swell energy are important for applications such as swell wave power generation, ocean wave forecasting, disaster prevention and reduction, etc. However, the study on the propagation of swell energy is still relatively rare. This study proposed a new method to exhibit the exact propagation route and speed and intraseasonal oscillation of swell energy. The Indian Ocean is selected as a case study, using the 45-year (1957.09–2002.08) European Centre for Medium-Range Weather Forecasts (ECMWF) Reanalysis (ERA-40) wave reanalysis dataset. The main results are as follows. (1) empirical orthogonal function (EOF) analysis and 6-hourly zonal averages of swell wave power density (WPD) show that the Indian Ocean swell energy has an obvious but fluctuating northeastward propagation. (2) The swell energy of the southwest Indian Ocean generally spreads to two regions: the main body propagates in a NE–NNE direction to Sri Lankan waters, while a small branch propagates to Christmas Island waters. (3) Swell energy in the west of the southern Indian Ocean westerly (SIOW), in Sri Lankan waters, and in Christmas Island waters share a common period of quasi-weekly oscillation. Swell energy takes ∼6days to propagate from the west of the SIOW to Sri Lankan and Christmas Island waters. Swell energy propagates faster during June–September than in other months.
    Keywords case studies ; data collection ; disaster preparedness ; energy ; intraseasonal oscillation ; oceans ; power generation ; water power ; water waves ; weather forecasting ; Indian Ocean
    Language English
    Dates of publication 2017-0701
    Size p. 342-353.
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 2000772-3
    ISSN 0306-2619
    ISSN 0306-2619
    DOI 10.1016/j.apenergy.2017.04.052
    Database NAL-Catalogue (AGRICOLA)

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  4. Article: Influence of eggshell ultrastructural organization on hatchability.

    Liao, B / Qiao, H G / Zhao, X Y / Bao, M / Liu, L / Zheng, C W / Li, C F / Ning, Z H

    Poultry science

    2013  Volume 92, Issue 8, Page(s) 2236–2239

    Abstract: Eggshell quality is associated with hatchability, and ultrastructural organization is an important eggshell quality parameter. To the determine the relationship of shell ultrastructural properties with hatchability, we measured the effect of eggshell ... ...

    Abstract Eggshell quality is associated with hatchability, and ultrastructural organization is an important eggshell quality parameter. To the determine the relationship of shell ultrastructural properties with hatchability, we measured the effect of eggshell thickness, mammillary layer thickness, and the average size of mammillary cones on hatchability. Eggs with thick shells and thick mammillary layers had the highest incidence of hatching. As such, hatchability correlated positively with both eggshell thickness (r = 0.30; P < 0.05) and mammillary layer thickness (r = 0.28; P < 0.05). In addition, the correlation between the average size of mammillary cones and hatchability was not statistically significant. However, a significant positive correlation was observed between the average size of mammillary cones and mammillary layer thickness. It can be concluded that eggshell thickness and mammillary layer thickness affect hatchability.
    MeSH term(s) Animals ; Chickens/physiology ; Egg Shell/ultrastructure ; Female ; Microscopy, Electron, Scanning
    Language English
    Publishing date 2013-07-15
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 242586-5
    ISSN 1525-3171 ; 0032-5791
    ISSN (online) 1525-3171
    ISSN 0032-5791
    DOI 10.3382/ps.2012-02728
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 853: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
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  5. Article: Influence of eggshell ultrastructural organization on hatchability

    Liao, B. / Qiao, H. G. / Zhao, X. Y. / Bao, M. / Liu, L. / Zheng, C. W. / Li, C. F. / Ning, Z. H.

    Poultry science

    2013  Volume 92, Issue 8, Page(s) 2236

    Language English
    Document type Article
    ZDB-ID 242586-5
    ISSN 0032-5791
    Database Current Contents Nutrition, Environment, Agriculture

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    In stock of ZB MED Bonn / Germany

    Z 860: Show issues

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  6. Article: [Trial vaginal delivery for women with previous cesarean section].

    Zheng, C W / Hong, W / Lin, F G

    Zhonghua fu chan ke za zhi

    1994  Volume 29, Issue 8, Page(s) 456–7, 508

    Abstract: A retrospective analysis was made on 85 cases of trial labor after previous cesarean section (CS) and compared with 100 primiparous vaginal deliveries (as control) during the last 10 years. Oxytocin infusion has been used in 61 trial cases to induce and/ ... ...

    Abstract A retrospective analysis was made on 85 cases of trial labor after previous cesarean section (CS) and compared with 100 primiparous vaginal deliveries (as control) during the last 10 years. Oxytocin infusion has been used in 61 trial cases to induce and/or to accelerate labor, and valium, procaine and atropine administered during the labor process in 23 of them. 65 of the 85 cases (76.5%) successfully delivered through the vagina (VD group), while 20 cases (23.5%) had repeat CS following failure in trial labor (CS group), and 3 women had reatened uterine rupture. There was 1 neonatal death in the VD trial labor group. No obvious difference in the Apgar scores of newborns was found between the CS group and the controls, and the duration of the labor process was much shorter in the VD trial group than that in the primiparae (7.51 +/- 2.44 hrs vs. 9.10 +/- 3.75 hrs) (P < 0.01). This study indicated that following a previous uneventful transverse lower segment cesarean section, trial labor should be encouraged under supervision.
    MeSH term(s) Adult ; Cesarean Section ; Female ; Humans ; Pregnancy ; Retrospective Studies ; Trial of Labor ; Vaginal Birth after Cesarean
    Language Chinese
    Publishing date 1994-08
    Publishing country China
    Document type English Abstract ; Journal Article
    ZDB-ID 604570-4
    ISSN 0529-567X
    ISSN 0529-567X
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1619: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)
    Zs.MO 324: Show issues

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