The Experts below are selected from a list of 117 Experts worldwide ranked by ideXlab platform
Feifeng Zheng - One of the best experts on this subject based on the ideXlab platform.
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A branch-and-price framework for the general double-cycling problem with internal-reshuffles
2015 IEEE 12th International Conference on Networking Sensing and Control, 2015Co-Authors: Shijin Wang, Feifeng ZhengAbstract:Double-cycling problem is motivated in quay crane scheduling practice at container ports, where a quay crane is enabled to simultaneously unload and load one container in a cycle. As container vessels are generally equipped with Hatch Covers, which induce precedence constraints. Regarding the impact of Hatch Covers, this paper proposes models and algorithm for the general double-cycling problem with internal-reshuffles, where reshuffle containers are allowed to move directly from one stack to another. As there is no exact solution to double-cycling problem with internal reshuffles, we present a branch-and-price framework to optimally solve it.
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ICNSC - A branch-and-price framework for the general double-cycling problem with internal-reshuffles
2015 IEEE 12th International Conference on Networking Sensing and Control, 2015Co-Authors: Shijin Wang, Feifeng ZhengAbstract:Double-cycling problem is motivated in quay crane scheduling practice at container ports, where a quay crane is enabled to simultaneously unload and load one container in a cycle. As container vessels are generally equipped with Hatch Covers, which induce precedence constraints. Regarding the impact of Hatch Covers, this paper proposes models and algorithm for the general double-cycling problem with internal-reshuffles, where reshuffle containers are allowed to move directly from one stack to another. As there is no exact solution to double-cycling problem with internal reshuffles, we present a branch-and-price framework to optimally solve it.
D.a. Taylor - One of the best experts on this subject based on the ideXlab platform.
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Chapter 10 – Deck machinery and hull equipment
Introduction to Marine Engineering, 1996Co-Authors: D.a. TaylorAbstract:Publisher Summary This chapter discusses the various deck machinery used by a ship and several hull equipment found inside the machinery space. These include deck machinery such as mooring equipment, anchor handling equipment, cargo handling equipment, and Hatch Covers. Other items include lifeboats and liferafts, emergency equipment, watertight doors, stabilizers, and bow thrusters. The operations of mooring, cargo handling, and anchor handling all involve controlled pulls or lifts using chain cables, wire, or hemp ropes. The drive force and control arrangements adopted will influence the operations. Several methods are currently in use, and these are examined in this chapter. And then it considers the associated equipment. Three forms of power are currently in use: steam, hydraulic, and electric. The chapter describes each one of them together with its advantages and disadvantages for particular duties or locations. Finally, the last section of the chapter explores the different kinds of safety equipments. These are emergency equipment for power generation and pumping, survival equipment such as lifeboats and liferafts, and the sound signal equipment in the form of the whistle.
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Deck machinery and hull equipment
Introduction to Marine Engineering, 1990Co-Authors: D.a. TaylorAbstract:This chapter discusses the various deck machinery used by a ship and several hull equipment found inside the machinery space. These include deck machinery such as mooring equipment, anchor handling equipment, cargo handling equipment, and Hatch Covers. Other items include lifeboats and liferafts, emergency equipment, watertight doors, stabilizers, and bow thrusters. The operations of mooring, cargo handling, and anchor handling all involve controlled pulls or lifts using chain cables, wire, or hemp ropes. The drive force and control arrangements adopted will influence the operations. Several methods are currently in use, and these are examined in this chapter. And then it considers the associated equipment. Three forms of power are currently in use: steam, hydraulic, and electric. The chapter describes each one of them together with its advantages and disadvantages for particular duties or locations. Finally, the last section of the chapter explores the different kinds of safety equipments. These are emergency equipment for power generation and pumping, survival equipment such as lifeboats and liferafts, and the sound signal equipment in the form of the whistle.
Y F Alobaid - One of the best experts on this subject based on the ideXlab platform.
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automated analysis of topside platform Hatch Covers subject to drill collar impact
Computers & Structures, 1996Co-Authors: Y F AlobaidAbstract:An automated procedure based on available empirical formulae for penetration and perforation in steel objects is developed. A computer program is written in FORTRAN 77 to solve these empirical formulae using various material properties and dropped heights. Results obtained from these formulae are compared with those obtained from the finite element program OBAID. Flow chart and partial program listings together with the output are given for those who wish to carry out in-depth study. This paper is the beginning of the vast Kuwaiti program of research work on the safety analysis of oil rigs against impact and explosion.
Shijin Wang - One of the best experts on this subject based on the ideXlab platform.
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A branch-and-price framework for the general double-cycling problem with internal-reshuffles
2015 IEEE 12th International Conference on Networking Sensing and Control, 2015Co-Authors: Shijin Wang, Feifeng ZhengAbstract:Double-cycling problem is motivated in quay crane scheduling practice at container ports, where a quay crane is enabled to simultaneously unload and load one container in a cycle. As container vessels are generally equipped with Hatch Covers, which induce precedence constraints. Regarding the impact of Hatch Covers, this paper proposes models and algorithm for the general double-cycling problem with internal-reshuffles, where reshuffle containers are allowed to move directly from one stack to another. As there is no exact solution to double-cycling problem with internal reshuffles, we present a branch-and-price framework to optimally solve it.
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ICNSC - A branch-and-price framework for the general double-cycling problem with internal-reshuffles
2015 IEEE 12th International Conference on Networking Sensing and Control, 2015Co-Authors: Shijin Wang, Feifeng ZhengAbstract:Double-cycling problem is motivated in quay crane scheduling practice at container ports, where a quay crane is enabled to simultaneously unload and load one container in a cycle. As container vessels are generally equipped with Hatch Covers, which induce precedence constraints. Regarding the impact of Hatch Covers, this paper proposes models and algorithm for the general double-cycling problem with internal-reshuffles, where reshuffle containers are allowed to move directly from one stack to another. As there is no exact solution to double-cycling problem with internal reshuffles, we present a branch-and-price framework to optimally solve it.
Tatsuya Hayashi - One of the best experts on this subject based on the ideXlab platform.
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green sea loads on Hatch Covers of bulk carrier
Journal of the Society of Naval Architects of Japan, 2001Co-Authors: Yoshitaka Ogawa, Makiko Minami, Katsuji Tanizawa, Atsushi Kumano, Ryoju Matsunami, Tatsuya HayashiAbstract:A series of model tests in waves were conducted to measure the green sea loads that act on deck and Hatch Covers due to shipping water. A model of bulk carrier was used. The tests were carried out in irregular waves of which significant height is 10.6 meters and peak period is 14 seconds. In order to discuss the effects of wave heading and ship forward speed on the green sea loads, the model tests were made in several combinations of wave heading and ship speed conditions. It was confirmed that the deck wetness and green sea loads will be reduced considerably if the wave heading is altered to the quarter or beam seas or the ship speed is reduced.In order to assess the experimental results quantitatively, green sea loads were estimated by the practical estimation methods that were developed by the one of authors. Having compared with measured results, it was found that the estimated results were in good agreement with measured ones. It is concluded that the experimental results were rational.Comparison of green sea loads between measured results and present rules, ICLL66 and IACS UR-S21, was made. Although it is difficult to directly correlate measured values with the rules, mean values tend to be larger than the ones of ICLL66. It is also found that the green sea loads defined in IACS UR-S21 is ranked to somewhere between 1/10 and 1/3 significant values in relation to the measured results.
