Suchergebnisse

The ocean engineering equipment industry is the foundation for the implementation of maritime strategy. China's national departments at all levels have developed relevant ocean engineering equipment industry policies to promote the rapid development of the industry. By using 56 industrial policies issued between 2010 and 2020 as the research sample, we conducted an in-depth assessment of the external structural characteristics and structure of the main cooperation network for such policies using descriptive statistics and social network analysis. Based on a symmetric analysis method, the two-dimensional matrix of cooperation breadth and cooperation depth, together with the measurement of the issuing subject's centrality, was used to analyze the evolution of the subject's role in the network. The research shows that the development of China's ocean engineering equipment industry policies can be divided into three stages, and there are the following problems during the development of policies: (1) some policies and regulations are imperfect; (2) the network of cooperation among joint issuers is limited; and (3) some policies are issued by multiple government departments, but there is a lack of specialized and unified management from an absolute core department. Based on the above problems, we present some suggestions for policy optimization at the end of this paper.

Contract no. 03-7-038-739 (1F). ; Consultants: Adrian F. Richards and Hudson Matlock. ; Mode of access: Internet.

On the modelling of coupled hydro-mechanical behaviour of interfaces for offshore foundations / B. Cerfontaine and F. Collin -- Innovative redundant and reconfigurable propulsion systems : fast prototyping through simplified simulation and design procedures / Benedetto Allotta, Luca Pugi, Marco Pagliai and Libero Paolucci -- Technologies to improve ship efficiency and reduce harmful emissions / Salma Sherbaz, Wenyang Duan and Jawad Khan

The relationship between the level of atmospheric CO₂ and the impacts of climate change are uncertain, but a safe concentration may be surpassed this century. Therefore, it is necessary to develop technologies that can accelerate CO₂ removal from the atmosphere. This paper explores the engineering challenges of a technology that manipulates the carbonate system in seawater by the addition of calcium oxide powder (CaO; lime), resulting in a net sequestration of atmospheric CO₂ into the ocean (ocean liming; OL). Every tonne of CO₂ sequestered requires between 1.4 and 1.7 tonnes of limestone to be crushed, calcined, and distributed. Approximately 1 tonne of CO₂ would be created from this activity, of which >80% is a high purity gas (pCO₂ >98%) amenable to geological storage. It is estimated that the thermal and electrical energy requirements for OL would be 0.6 to 5.6 GJ and 0.1 to 1.2 GJ per net tonne of CO₂ captured respectively. A preliminary economic assessment suggests that OL could cost approximately US$72-159 per tonne of CO₂. The additional CO₂ burden of OL makes it a poor alternative to point source mitigation. However, it may provide a means to mitigate some diffuse emissions and reduce atmospheric concentrations.

Trends in Maritime Technology and Engineering comprises the papers presented at the 6th International Conference on Maritime Technology and Engineering (MARTECH 2022) that was held in Lisbon, Portugal, from 24-26 May 2022. The Conference has evolved from the series of biennial national conferences in Portugal, which have become an international event, and which reflect the internationalization of the maritime sector and its activities. MARTECH 2022 is the sixth of this new series of biennial conferences. The book covers all aspects of maritime activity, including in Volume 1: Structures, Hydrodynamics, Machinery, Control and Design. In Volume 2: Maritime Transportation and Ports, Maritime Traffic, Safety, Environmental Conditions, Renewable Energy, Oil & Gas, and Fisheries and Aquaculture. Trends in Maritime Technology and Engineering aims at academics and professionals in the above mentioned fields.

Science for an ocean nation : update of the Ocean Research Priorities Plan / Subcommittee on Ocean Science and Technology -- Executive Order 13547 : stewardship of the ocean, our coasts, and the Great Lakes / The White House Ofice of the Press Secretary