The Experts below are selected from a list of 10581 Experts worldwide ranked by ideXlab platform
Zhanyou Lou - One of the best experts on this subject based on the ideXlab platform.
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Numerical Analysis of the Soil Deformation Caused by Tunneling under Vehicle Loads in the Coastal Reclamation Area
Hindawi Limited, 2015Co-Authors: Baoping Zou, Jianxiu Wang, Qian Tian, Wei Guo, Jianhui Yang, Zhanyou LouAbstract:Prediction of tunneling induced soil deformation is an important issue in the design of tunnels constructed in the densely populated urban areas. In this paper, commercial FEM software 3D ABAQUS is adopted to simulate the behavior of soil caused by tunneling under vehicle loads in the coastal reclamation area. A field case study was also carried out to verify the accuracy of the proposed model. A good agreement was achieved. It is also found from the studies that the areas affected by soil deformation can be classified into four zones: the key disturbed zone, the secondary disturbed zone, the general disturbed zone, and minor-disturbed zone. The maximum soil deformation occurs on side of the longitudinal medial axis of the tunnel. The shape of the settlement Curve is almost the same as that of the Normal Distribution Curve. The soil deformation in the action zone of vehicle load is greater than that of the nonaction zone of vehicle load
Lou Zhanyou - One of the best experts on this subject based on the ideXlab platform.
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Numerical analysis of the soil deformation caused by tunneling under vehicle loads in the coastal reclamation area
'Hindawi Limited', 2015Co-Authors: Zou Baoping, Wang Jianxiu, Tian Qian, Guo Wei, Yang Jianhui, Yi Jue, Lou ZhanyouAbstract:Prediction of tunneling induced soil deformation is an important issue in the design of tunnels constructed in the densely populated urban areas. In this paper, commercial FEM software 3D ABAQUS is adopted to simulate the behavior of soil caused by tunneling under vehicle loads in the coastal reclamation area. A field case study was also carried out to verify the accuracy of the proposed model. A good agreement was achieved. It is also found from the studies that the areas affected by soil deformation can be classified into four zones: the key disturbed zone, the secondary disturbed zone, the general disturbed zone, and minor-disturbed zone. The maximum soil deformation occurs on side of the longitudinal medial axis of the tunnel. The shape of the settlement Curve is almost the same as that of the Normal Distribution Curve. The soil deformation in the action zone of vehicle load is greater than that of the nonaction zone of vehicle load.Published versio
Jinchuan Huang - One of the best experts on this subject based on the ideXlab platform.
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management implications to water resources constraint force on socio economic system in rapid urbanization a case study of the hexi corridor nw china
Water Resources Management, 2007Co-Authors: Chuanglin Fang, Chao Bao, Jinchuan HuangAbstract:As water has become the shortest resources in arid, semi-arid and rapid urbanization areas when the water resources utilization has approached or exceeded its threshold, water resources system slows down the socio-economic growth rate and destroys the projected targets to eradicate poverty and realize sustainable development. We put forward the concept of Water Resources Constraint Force (WRCF) and constructed a conceptual framework on it. Conceptual models on the interactions and feedbacks between water resources and socio-economic systems in water scarce regions or river basins indicate that, if the socio-economic system always aims at sustainable development, WRCF will vary with a Normal Distribution Curve. Rational water resources management plays an important role on this optimistic variation law. Specifically, Water Demand Management (WDM) and Integrated Water Resources Management (IWRM) are considered as an important perspective and approach to alleviate WRCF. A case study in the Hexi Corridor of NW China indicates that, water resources management has great impact on WRCF both in Zhangye and Wuwei Region, and also the river basins where they are located. The drastic transformation of water resources management pattern and the experimental project – Building Water-saving Society in Zhangye Region alleviated the WRCF to some extent. However, from a water resources management view, WRCF in Zhangye Region still belongs to the severe constraint type. It will soon step into the very severe constraint type. In order to shorten the periods from the very severe constraint type finally to the slight constraint type, WDM and IWRM in the Hei River Basin should be improved as soon as possible. However, in the Shiyang River Basin, WRCF belongs to the very severe constraint type at present due to poor water resources management in the past. Though the socio-economic system adapted itself and alleviated the WRCF to some extent, the Shiyang River Basin had to transform the water supply management pattern to WDM, and seek IWRM in recent years. It is concluded that WDM and IWRM is a natural selection to alleviate the WRCF on the socio-economic system and realize sustainable development.
G. Arumaikkannu - One of the best experts on this subject based on the ideXlab platform.
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modelling for randomly oriented multi material additive manufacturing component and its fabrication
Materials & Design, 2014Co-Authors: M Sugavaneswaran, G. ArumaikkannuAbstract:Abstract Additive Manufacturing (AM) is one of the advanced manufacturing processes, which was initially used only for visualization purpose as Rapid Prototype (RP) components. In later stages due to the advancement of materials processing in AM technology it is also used to manufacture tools and functional parts. In material science field AM is very much useful in the development of multi material component such as functionally gradient materials, heterogeneous material structures and porous material structures. These structures have tremendous applications in the field of aeronautical, automobile and medical industries. But some of the traditional techniques, which are used for fabrication of these structures, have difficulties such as uniform & random Distribution, size and shape control and maximum percentage of secondary materials to the primary materials. In this work a novel methodology is introduced for the fabrication of randomly oriented multi material (ROMM) using Polyjet 3D Printing (3DP) machine, which takes into account for the Distribution of plastic reinforcement in matrix elastomer as modelled using Computer Aided Design (CAD) software. CATIA VB SCRIPT has been used for ROMM CAD modelling. Stress–strain behaviour of Polyjet 3DP component (with pure elastomer and with randomly oriented plastic reinforced elastomer) is carried out in Universal Testing Machine (UTM). It has been found that ROMM with plastic reinforcement provides significantly improved stiffness compared to pure elastomer component. In addition, the stiffness is consistent among different ROMM Polyjet 3DP components, which were taken at three different orientations (Horizontal, Inclined and Vertical) from the ROMM rectangular plate domain. It shows that reinforcement is uniformly distributed. Normal Distribution Curve and volumetric analysis is carried out in ROMM to verify uniform and random Distribution of plastic reinforcement in elastomer. Based on the experimental results, this modelling and manufacturing technique can be used for the spatial orientation of reinforcement in the ROMM component and its fabrication with better stiffness for form & fit and functional parts applications.
Gongjen Liu - One of the best experts on this subject based on the ideXlab platform.
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seasonal variation of chlorophyll a concentration primary production and environmental conditions in the subtropical east china sea
Deep-sea Research Part Ii-topical Studies in Oceanography, 2003Co-Authors: Gwoching Gong, Yunho Wen, Bowen Wang, Gongjen LiuAbstract:Abstract Chlorophyll a concentration, primary production, and environmental conditions over the entire shelf of the subtropical East China Sea (ECS) were studied extensively during four seasonal cruises between December 1997 and October 1998. Nutrient concentrations in the northwestern half of the shelf were enriched all year-round, but primary production showed high seasonal variations. Intensive primary production was mostly observed in summer at about 939 mg C m−2 d−1. On average, the value in summer was about 3 times higher than that in other seasons. Annual primary production was 155 g C m−2 y−1. In the southeastern half of the shelf, on the other hand, nutrient concentrations were seasonally variable, but primary production showed only slight seasonal variations with a mean value of 395 mg C m−2 d−1. Annual primary production was 144 g C m−2 y−1. The annual variations in shelf-averaged primary production can be well described with a Normal Distribution Curve. For the entire shelf of the ECS, annual primary production was 145 g C m−2 y−1. The rate of primary production was regulated by seawater temperature from winter to early spring. The rate of primary production was, in turn, regulated by the availability of nutrients, especially phosphate, from summer to autumn. In addition, turbidity might also play a role in the regulation of primary production in the waters of the inner shelf.
