搜索结果: 1-8 共查到“mineral resources”相关记录8条 . 查询时间(0.079 秒)
Preface: Front edge of submarine mineral resources research in Japan (Part 2)
Japan ubmarine mineral resources
font style='font-size:12px;'>
2017/4/10
As we mentioned in the preface of the last special issue
(Suzuki et al., 2015), greater interests in submarine resources
have been generated recently because many people
have realized their high po...
RESEARCH ON MINERAL RESOURCES PLANNING AND MANAGEMENT INFORMATION SYSTEM BASED-ON GIS TECHNOLOGY
Mineral Resources Planning and Management GIS Function Design Database Design Secondary Development
font style='font-size:12px;'>
2016/3/17
Mineral resources are important non-renewable resource, its reserves are limited. However, with the social development and population growth, the depletion of mineral resources is increasing rapidly, ...
《Lithology and Mineral Resources》（图）
Lithology and Mineral Resources formation of sedimentary rocks ores
font style='font-size:12px;'>
2013/10/9
Lithology and Mineral Resources (Litologiya i poleznye iskopaemye) reviews a wide range of problems related to the formation of sedimentary rocks and ores. Special attention is devoted to comparison o...
Lithuanian mineral resources and their usage:today,future,and problems
mineral resources today future problems
font style='font-size:12px;'>
2009/10/21
Mineral resources have been, are now, and will be one of the main factors of the economic and social progress of our societies. The 20th century was the century of practically global industrialization...
Some problems of sustainable management of mineral resources in Poland
mineral resources Poland environmental-spatial planning sustainable mining
font style='font-size:12px;'>
2009/10/21
Management under the framework of sustainable development requires a change in the attitude to ongoing activities, as well as a new value hierarchy in which, instead of direct profit, improvement of t...
Developing the Mineral Resources of the Seabed
Mineral Resources Seabed economic well-being
font style='font-size:12px;'>
2008/12/17
The world’s oceans have played a vital role in the development of
virtually every nation. They provide the transportation network that
binds us together through trade; they yield much of the food th...
Valuable mineral resources are widely distributed throughout the seabed. autonomous underwater vehicles (AUVs) are preferable to remotely-operated vehicles (ROVs) when probing for such mineral resources as the extensive exploration area makes it difficult to maintain contact with operators. AUVs depend on batteries, so their power consumption should be reduced to extend exploration time. Power for conventional marine instrument systems is incorporated in their waterproof sealing. External intermittent control of this power source until termination of exploration is challenging due to limitations imposed by the underwater environment. Thus, the AUV must have a power control system that can improve performance and maximize use of battery capacity. The authors developed such a power control system with a three-step algorithm. It automatically detects underwater operational states and can limit power, effectively decreasing power consumption by about 15%.
surface piercing propeller boundary element method hydrodynamic characteristics
font style='font-size:12px;'>
2011/9/13
Demand for high-speed marine vehicles (HSMVs) is high among both commercial and naval users. It is the duty of the marine vessel’s designer to provide a hull and propulsion system that diminishes drag...
Department of Geology and Mineral Resources Engineering
Department of Geology and Mineral Resources Engineering 地质资源
font style='font-size:12px;'>
2008/1/2
Natural events show us how small we really are. When geological processes are at their most active we can easily see the value of geologic expertise, useful in predicting earthquakes, volcanic eruptio...