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Xiong De-qi

Bio: Xiong De-qi is an academic researcher from Dalian Maritime University. The author has contributed to research in topics: Plume & Land cover. The author has an hindex of 3, co-authored 8 publications receiving 75 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, the authors developed a quantitative risk assessment (QRA) model to evaluate the risk of ship being involved in ship collisions which takes into account the frequency and consequence of all possible accident scenarios.

76 citations

Journal ArticleDOI
TL;DR: In this paper, the potential for conflict between the fishing industry and the hydrocarbon concentration fields is described by means of numerical modeling techniques, and the results from these modelling works are then combined with the modeling of the far-field transport and dilution of the underwater plume, and also the modelling of the spreading and transport of larvae from spawning areas.

8 citations

01 Jan 2009
TL;DR: The growth condition and micro-morphology were studied to reveal the inhibition of NiO nanoparticles to Chlorella sp.by contrast with Ni2+.
Abstract: The growth condition and micro-morphology were studied to reveal the inhibition of NiO nanoparticles to Chlorella sp.by contrast with Ni2+.The EC50 value of NiO nanoparticles to Chlorella sp.at 96 h was 31.4 mg/L by the probability unit method,but the EC50 value of Ni2+ was 1.73 mg/l in the same condition.The cell micro-morphology of Chlorella sp.inhibited by NiO and Ni2+ were observered by Scanning Electron Microscopy(SEM) and Transimission Electron Microscopy(TEM).It showed that the cell of Chlorella sp.inhibited by Ni2+ was shrinked,distored and the cell organ was destroyed.However,the one inhibited by NiO partly showed a phenomenon of the cell languishment.The result showed that Ni2+ was far more toxic than NiO nanoparticles.

5 citations

Proceedings ArticleDOI
14 Oct 2010
TL;DR: In this paper, the authors investigated changes in the nature of and the extent of the land use/cover in a less studied part of Africa, a small section of western coastal Guinea using topographic map and ETM+ image processing, interpretation and GIS overlay method.
Abstract: Research findings into recent changes in the natural environment and land use/cover change in many parts of Africa have been well documented. This research had the aim of investigating such changes in a less studied part of Africa, a small section of western coastal Guinea. Topographic map and ETM+ image processing, interpretation and GIS overlay method were used to make comparisons over time. Quantifiable and significant changes in the nature of and the extent of the land use/cover were found to have occurred. The results of this research also showed a steep growth in the cities and urban areas of this region. Similar research of other parts of Guinea may yield comparable findings. In such a case this may well encourage the Guinea government in cooperation with both the scientific community and local communities to set up urgent and practical policies for the management of land use/cover in this region.

3 citations

Journal Article
TL;DR: In this paper, a marine oil spill transport and fate numerical modeling method under complex modes of leakage such as multi-source leakage and moving leakage was developed based on the particle tracking theory, and the transport and weathering processes of marine oil spills including transport, diffusion, evaporation,dissolution,emulsification,dispersion under wind and ocean current actions were simulated.
Abstract: To evaluate the risks of marine oil spill and its damage to ecological environment,and thereby work out corresponding countermeasures,a marine oil spill transport and fate numerical modeling method under complex modes of leakage such as multi-source leakage and moving leakage was developed based on the particle tracking theory,and the transport and weathering processes of marine oil spill including transport,diffusion,evaporation,dissolution,emulsification,dispersion under wind and ocean current actions were simulated.Two oil spill accidents happened in Dalian Bay in succession were selected as cases study,and results show that the simulated temporal-spatial distributions of surface oil slicks are in good agreement with the observed data.

2 citations


Cited by
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Journal ArticleDOI
Pu Li1, Qinhong Cai1, Weiyun Lin1, Bing Chen1, Baiyu Zhang1 
TL;DR: The emerging challenges in cold and harsh environments are reviewed with recommendations due to increasing risk of oil spills in the northern regions from the expansion of the Arctic Passage.

220 citations

Journal ArticleDOI
TL;DR: The results indicate that the toxicity and bioavailability of NiO nanoparticles to marine algae are reduced by aggregation and reduction ofNiO, indicating that marine algae have the potential for usage in nano-pollution bio-remediation in aquatic system.

202 citations

Journal ArticleDOI
TL;DR: Detailed literature on probabilistic risk analysis on ship-ship collision was collected and reviewed focusing on the stakeholders which may benefit from the research and the methodologies and criteria adopted for collision risk, to potentially contribute to developing better risk models and therefore better maritime transportation systems.

144 citations

Journal ArticleDOI
TL;DR: A comparison between seven popular AIS data-based collision candidate methods is performed, and the results indicate that the proposed method outperforms the other methods regarding its robustness towards the choice of parameter settings.

101 citations

Journal ArticleDOI
TL;DR: Investigation of how far the current ship risk models for ship-ship collision, ship-structure collision, and groundings are applicable for risk assessment of Marine Autonomous Surface Ships finds none of them are suitable to be directly used for risk Assessment of MASS.

91 citations