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湖南益阳地区水产养殖业常见问题及发展对策探讨
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作者 付乃革 任文杰 《当代水产》 2025年第7期67-67,69,共2页
水产养殖业是湖南益阳地区农业经济的重要支柱,淡水养殖规模与特色品种产量均位居全省前列。但在产业快速扩张过程中,生态、种质、技术等方面的问题逐渐显现,制约了水产养殖业的可持续发展。本文综合分析了该地区水产养殖业的发展现状,... 水产养殖业是湖南益阳地区农业经济的重要支柱,淡水养殖规模与特色品种产量均位居全省前列。但在产业快速扩张过程中,生态、种质、技术等方面的问题逐渐显现,制约了水产养殖业的可持续发展。本文综合分析了该地区水产养殖业的发展现状,分析了其发展中面临的主要问题,并提出了针对性对策,以期为区域水产养殖业高质量发展提供决策依据。 展开更多
关键词 技术问题 种质问题 湖南益阳 生态问题 可持续发展
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Interaction due to various sources in saturated porous media with incompressible fluid
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作者 Rajneesh Kumar Ibrahim A.Abbas 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第5期1232-1242,共11页
The disturbance due to mechanical and thermal sources in saturated porous media with incompressible fluid for two-dimensional axi-symmetric problem is investigated.The Laplace and Hankel transforms techniques are used... The disturbance due to mechanical and thermal sources in saturated porous media with incompressible fluid for two-dimensional axi-symmetric problem is investigated.The Laplace and Hankel transforms techniques are used to investigate the problem.The concentrated source and source over circular region have been taken to show the utility of the approach.The transformed components of displacement,stress and pore pressure are obtained.Numerical inversion techniques are used to obtain the resulting quantities in the physical domain and the effect of porosity is shown on the resulting quantities.All the field quantities are found to be sensitive towards the porosity parameters.It is observed that porosity parameters have both increasing and decreasing effect on the numerical values of the physical quantities.Also the values of the physical quantities are affected by the different boundaries.A special case of interest is also deduced. 展开更多
关键词 axi-symmetry incompressible porous medium pore pressure Laplace transform Hankel transform concentrated source and source over circular region
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