Hydro Energy Magazines & Journals
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Key water utility trends for 2020
Smart water metering and water resiliency, as well as low-power, wide-area network (LPWAN) technologies are top trends that will shape the water utility industry in 2020. ...
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Aquaculture Europe Volume 40 No 2 - Content Table
Recent developments and future perspectives of using marine microalgae in fish ...
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Yeni Enerji
Domestic and international editorials, news, reviews and opinion/viewpoint articles on worldwide developments, theories and approaches in the renewable energy technologies field. Scientific technical articles on renewable energy sources and technologies such as solar power systems and solar batteries, wind power, geothermal, biomasses, ocean tides, hydrogen, hydroelectric, wood (pellet), fuel ...
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Renewable Energy Focus Magazine
With technological advances, economic pressures and environmental imperatives driving rapid growth in renewable energy, the pressure on scientists and industry to develop and adopt new methods for generating energy has never been so ...
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International Journal on Hydropower & Dams
The International Journal on Hydropower & Dams is a bi-monthly publication, read in 180 countries, dealing with all technical, environmental, social and economic aspects of hydro plants and multipurpose water resources development projects. It combines business news with state-of-the-art technology. Each issue has a regional focus, and special technical themes of interest to engineers in all ...
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'Shortest path' ray tracing for most general 2D/3D anisotropic media
This paper presents a simple method for seismic ray tracing in a general anisotropic medium, which may include complex structures and compound materials, such as water, isotropic and anisotropic rocks, fine-layers and parallel small cracked blocks. The anisotropy may be defined by up to 21 density-normalized elastic moduli which vary with spatial position. The method presented is a direct ...
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Numerical study of seismic scattering and waveguide excitation in faulted coal seams
Finite-difference P-SV simulations of seismic scattering characteristics of faulted coal-seam models have been undertaken for near-surface P- and S-wave sources in an attempt to understand the efficiency of body-wave to channel-wave mode conversion and how it depends on the elastic parameters of the structure. The synthetic seismograms clearly show the groups of channel waves generated at the ...
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Wavenumber sampling strategies for 2.5-D frequency-domain seismic wave modelling in general anisotropic media
The computational efficiency of 2.5-D seismic wave modelling in the frequency domain depends largely on the wavenumber sampling strategy used. This involves determining the wavenumber range and the number of the sampling points, and overcoming the singularities in the wavenumber spectrum when taking the inverse Fourier transform to yield the frequency-domain wave solution. In this paper, we ...
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KW Korrespondenz Wasserwirtschaft
The KW– Korrespondenz Wasserwirtschaft is the organ of the DWA for general water management issues: hydrology, water resources management, surface water and soil, hydraulic engineering, hydro power, surface water ecology, ground water, hydromechanics and flood protection. Added to this are cross-cutting issues such as law, economics, education and international cooperation. In addition to ...
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International Water Power & Dam Construction
Launched in 1949, International Water Power & Dam Construction has over 60 years experience of providing independent, technical and business analysis for the water power and dam construction industry. With an unrivalled reputation for reliable and quality editorial reports, it’s a must for anyone working in this dynamic industry. IWP&DC provides in-depth independent coverage of all ...
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Analytic expressions for the velocity sensitivity to the elastic moduli for the most general anisotropic media
For non-linear kinematic inversion of elastic anisotropy parameters and related investigations of the sensitivity of seismic data, the derivatives of the wavespeed (phase velocity and group velocity) with respect to the individual elastic moduli are required. This paper presents two analytic methods, called the eigenvalue and eigenvector methods, to compute the derivatives of the wavespeeds for ...
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Marine Biology
The Editors of Marine Biology invite and will consider for publication original contributions to the following fields of research: Plankton research: Studies on the biology, physiology, biochemistry and genetics of plankton organisms both under laboratory and field conditions. Biological and biochemical oceanography. Environment-organism and organism-organism interrelationships. Experimental ...
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Extrapolation of vector (elastic) displacements by displacement potential field continuation
Extrapolating recorded elastic displacement data from the surface downwards is the first step of a two-step elastic migration scheme. The second step is the image formation condition. Although an elastic (vector) reverse time migration can extrapolate elastic displacement data downwards, the subsurface reflections and the loss of energy due to the use of the two-way wave equations are ...
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International Journal of Renewable Energy Technology (IJRET)
IJRET seeks to promote and disseminate knowledge of all the various topics and technologies of different renewable energy ...
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On the computation of the Fréchet derivatives for seismic waveform inversion in 3D general anisotropic, heterogeneous media
We present a perturbation method and a matrix method for formulating the explicit Fréchet derivatives for seismic body-wave waveform inversion in 3D general anisotropic, heterogeneous media. Theoretically, the two methods yield the same explicit formula valid for any class of anisotropy and are completely equivalent if the model parameterization in the inversion is the same as that used in the ...
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On the computation of elastic wave group velocities for a general anisotropic medium
This paper deals exclusively with the computation of the group velocities for the three wave modes (qP, qS1, qS2) in a general anisotropic medium, which may involve up to 21 density-normalized elastic moduli. We tackled the shear-wave singularity problem through two independent approaches: (1) an eigenvalue method, and (2) an eigenvector method. In the former, we derive analytic formulae and ...
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