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RISS 인기검색어
- 검색키워드
- 저자 : Chen Deming (검색결과 4 건)
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The Strategical Research on the Cooperation between Ports and Shipping lines
Chen Deming 한국항해항만학회 2004 한국항해항만학회 학술대회논문집 Vol.5 No.-
In the light of necessary analysis on the cooperation and development between ports and shipping line, and the characteristic of cooperation between international ports and shipping lines, the article analyses the operating strategies in actual shipping lines benefits to the cooperation between ports and shipping lines. After all-round analysis on the cooperation and development between ports and shipping lines, the author presents the running model of ports and shipping lines in Far East, which is the integration of operation between ports and shipping lines (namely integration of logistics service network). Finally, the article points out that strengthening constantly the cooperation between ports and the fields of shipping, and boosting actively the cooperation and development model between ports and shipping lines, which benefits both to the interests of ports and shipping lines themselves and to stable and healthy growth of ports and shipping lines market in Asia, also is a inevitable choice of ports and shipping lines seeking how to develop in new international competition situation. With the world economy growing stably and going into integration quickly, it gives a favorable chance for the development of the world shipping market. In Asia, especially in Far East, it has become a competitive and developmental center of world shipping market. Under these circumstances, that how to keep the shipping predominance and boost the market developing with steady steps in Far East region, is a great invent which concerned to the ports and shipping companies of China, Japan and Korea. In recent years, our three countries all make the big steps on ports construction in order to accelerate its competitive capabilities in shipping market. As the developing strategic of cooperation between the ports and shipping lines is to give full enthusiasm to shipping companies in investing docks, storages and establishments, so all these could be beneficial to each side, and also make ports become very important node of logistics. Since the nineties of the twentieth century, the developing situation of the international shipping market has been taken a great change as the world and regions economy growing. This change is also made strong influence upon the world ports which make progress from feeder net of the shipping lines, transport technique and ports function. The ports get direct impact from shipping companies on their location, layout and ports operation equipments. In order to develop under such competitive condition, the ports should play more attention to ships calling economically and efficiently. For raising competitive ability, the main ports in cooperation with the shipping lines that specially attracting liners investing heavily in terminals with preferential portage and knight service have uninterrupted reinforced. At present, the cooperation between the ports and shipping lines have become a trend of developing for international liner market and port hub competitively as the strategical significance of the cooperation between the ports and liners concerned by shipping industry.
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Endovascular Repair of Blunt Popliteal Arterial Injuries
Shan Zhong,Xiquan Zhang,Zhong Chen,Peng Dong,Yequan Sun,Wei Zhu,Xiaolin Pan,Deming Qi 대한영상의학회 2016 Korean Journal of Radiology Vol.17 No.5
Objective: To evaluate the feasibility and effectiveness of endovascular repair for blunt popliteal arterial injuries. Materials and Methods: A retrospective analysis of seven patients with clinical suspicion of popliteal arterial injuries that were confirmed by arteriography was performed from September 2009 to July 2014. Clinical data included demographics, mechanism of injury, type of injury, location of injury, concomitant injuries, time of endovascular procedures, time interval from trauma to blood flow restoration, instrument utilized, and follow-up. All patients were male (mean age of 35.9 ± 10.3 years). The type of lesion involved intimal injury (n = 1), partial transection (n = 2), complete transection (n = 2), arteriovenous fistula (n = 1), and pseudoaneurysm (n = 1). All patients underwent endovascular repair of blunt popliteal arterial injuries. Results: Technical success rate was 100%. Intimal injury was treated with a bare-metal stent. Pseudoaneurysm and popliteal artery transections were treated with bare-metal stents. Arteriovenous fistula was treated with bare-metal stent and coils. No perioperative death and procedure-related complication occurred. The average follow-up was 20.9 ± 2.3 months (range 18–24 months). One patient underwent intra-arterial thrombolysis due to stent thrombosis at 18 months after the procedure. All limbs were salvaged. Stent migration, deformation, or fracture was not found during the follow-up. Conclusion: Endovascular repair seems to be a viable approach for patients with blunt popliteal arterial injuries, especially on an emergency basis. Endovascular repair may be effective in the short-term. Further studies are required to evaluate the long-term efficacy of endovascular repair.
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Xing’an Zhao,Biao Huang,Tairan Chen,Guoyu Wang,Deming Gao,Jing Zhao 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.2
We used computational modeling to investigate the cavitation performance of an aviation fuel pump, and optimize structural parameters using the surrogate-based method. In the numerical simulation, a rotation-curvature correction was adapted to the k-ε turbulence model, and a four-component surrogate fuel was selected to reproduce the physical properties of the China RP-3 kerosene. Then the performance of the aviation fuel pump was predicted. In the optimization, based on the series of the numerical results, Surrogate-based analysis and optimization (SBAO) was used to optimize the structural parameters of the fuel pump (the variation of the outlet blade angle for the inducer △β b1 and the variation of the inlet blade angle for the impeller △β b2 ). The results show that the prediction of cavitation performance agrees well with the experimental data. The results show that cavitation areas are mainly distributed in the inlet of the inducer. The volume of cavities grows with the decreasing NPSHa. The head of the fuel pump has a sudden head-drop when NPSHa ≤ 5.64 m. Furthermore, the surrogate-based approach is available in structural optimization of the fuel pump. The cavitation performance of the optimized pump improved about 22 % with a little drop of head coefficient when △β b1 = 4.33° and △β b2 = 3.24°. The numerical approach employed in this paper can accurately predict the cavitating flow of the high rotating speed fuel pump and the surrogate-based method is available in the structural optimization for a better cavitation performance.
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