Internal and external wall surface temperatures (Tws) in April, August and December in Kunming, a city in low latitude plateau, were investigated. Results showed that the Tws in April were of the highest among the thr...Internal and external wall surface temperatures (Tws) in April, August and December in Kunming, a city in low latitude plateau, were investigated. Results showed that the Tws in April were of the highest among the three, followed by August and December. The Tws differences among walls with different orientation were higher in April and December when the weather tends to be sunny, and lower in August with more cloudy days in the time. In April and August, Tws of E-wall was the highest, followed by S- and N-wall. But in December Tws of S-wall might be sometimes higher than E one. Diurnal range of internal Tws was usually smaller than that of the external, with also a time lag for the occurrence of its maximum and minimum. The results can serve as a basis for further research on building microclimate and urban architecture designs. It also gives suggestions for similar studies in other areas.展开更多
A complete case of a deep excavation was explored. According to the practical working conditions, a 3D non-linear finite element procedure is used to simulate a deep excavation supported by the composite soil nailed w...A complete case of a deep excavation was explored. According to the practical working conditions, a 3D non-linear finite element procedure is used to simulate a deep excavation supported by the composite soil nailed wall with bored piles in soft soil. The modified cam clay model is employed as the constitutive relationship of the soil in the numerical simulation. Results from the numerical analysis are fitted well with the field data, which indicate that the research approach used is reliable. Based on the field data and numerical results of the deep excavation supported by four different patterns of the composite soil nailed wall, the significant corner effect is founded in the 3D deep excavation. If bored piles or soil anchors are considered in the composite soil nailed wall, they are beneficial to decreasing deformations and internal forces of bored piles, cement mixing piles, soil anchors, soil nailings and soil around the deep excavation. Besides, the effects due to bored piles are more significant than those deduced from soil anchors. All mentioned above prove that the composite soil nailed wall with bored piles is feasible in the deep excavation.展开更多
Background:Most papers examining the lateral abdominal muscles(LAMs)and low back pain(LBP)are cross-sectional,with groups of participants being divided into a control and an LBP group.We hypothesized that morphologica...Background:Most papers examining the lateral abdominal muscles(LAMs)and low back pain(LBP)are cross-sectional,with groups of participants being divided into a control and an LBP group.We hypothesized that morphological measurements of the LAMs in adolescent soccer players may predict future LBP incidence.The aim of this study was to examine the associations between the morphology of LAMs and LBP incidence rate among adolescent soccer players.Methods:Ninety-seven adolescent male soccer players with no LBP at baseline were recruited into the prospective cohort study.The thickness of the LAMs was measured at baseline by ultrasound imaging in a supine rest position.Nine cases of LBP occurred during the follow-up 6-month observation.Results:An obliquus internus(OI)asymmetry was related to increasing LBP risk(odds ratio=19.99;95%CI:2.4-167.9).Spearman correlation also showed a linear relationship between OI asymmetry value and duration of LBP(R=0.75,p=0.02).An OI side-to-side difference greater than 1.25 mm suggests possible LBP incidence in the 6-month observation among adolescent soccer players.Conclusion:The morphological changes of the OI may be related to LBP’s incidence in adolescent soccer players.The presence of OI asymmetry increases the odds of LBP by at least 2.4 times.Hypertrophy of the OI on one side of the body may contribute to trunk muscle imbalance.展开更多
基金Key project from the Natural Science Foundation of China (59836250)
文摘Internal and external wall surface temperatures (Tws) in April, August and December in Kunming, a city in low latitude plateau, were investigated. Results showed that the Tws in April were of the highest among the three, followed by August and December. The Tws differences among walls with different orientation were higher in April and December when the weather tends to be sunny, and lower in August with more cloudy days in the time. In April and August, Tws of E-wall was the highest, followed by S- and N-wall. But in December Tws of S-wall might be sometimes higher than E one. Diurnal range of internal Tws was usually smaller than that of the external, with also a time lag for the occurrence of its maximum and minimum. The results can serve as a basis for further research on building microclimate and urban architecture designs. It also gives suggestions for similar studies in other areas.
基金Foundation item： Project（2009-K3-2） supported by the Ministry of Housing and Urban-Rural Development of China
文摘A complete case of a deep excavation was explored. According to the practical working conditions, a 3D non-linear finite element procedure is used to simulate a deep excavation supported by the composite soil nailed wall with bored piles in soft soil. The modified cam clay model is employed as the constitutive relationship of the soil in the numerical simulation. Results from the numerical analysis are fitted well with the field data, which indicate that the research approach used is reliable. Based on the field data and numerical results of the deep excavation supported by four different patterns of the composite soil nailed wall, the significant corner effect is founded in the 3D deep excavation. If bored piles or soil anchors are considered in the composite soil nailed wall, they are beneficial to decreasing deformations and internal forces of bored piles, cement mixing piles, soil anchors, soil nailings and soil around the deep excavation. Besides, the effects due to bored piles are more significant than those deduced from soil anchors. All mentioned above prove that the composite soil nailed wall with bored piles is feasible in the deep excavation.
文摘Background:Most papers examining the lateral abdominal muscles(LAMs)and low back pain(LBP)are cross-sectional,with groups of participants being divided into a control and an LBP group.We hypothesized that morphological measurements of the LAMs in adolescent soccer players may predict future LBP incidence.The aim of this study was to examine the associations between the morphology of LAMs and LBP incidence rate among adolescent soccer players.Methods:Ninety-seven adolescent male soccer players with no LBP at baseline were recruited into the prospective cohort study.The thickness of the LAMs was measured at baseline by ultrasound imaging in a supine rest position.Nine cases of LBP occurred during the follow-up 6-month observation.Results:An obliquus internus(OI)asymmetry was related to increasing LBP risk(odds ratio=19.99;95%CI:2.4-167.9).Spearman correlation also showed a linear relationship between OI asymmetry value and duration of LBP(R=0.75,p=0.02).An OI side-to-side difference greater than 1.25 mm suggests possible LBP incidence in the 6-month observation among adolescent soccer players.Conclusion:The morphological changes of the OI may be related to LBP’s incidence in adolescent soccer players.The presence of OI asymmetry increases the odds of LBP by at least 2.4 times.Hypertrophy of the OI on one side of the body may contribute to trunk muscle imbalance.
