The characteristics of the axial flow within the core of a concentrated line vortex are investigated using molecular tagging velocimetry (MTV). A well-defined array of isolated vortices of alternating sign is generated in the wake of a NACA-0012 airfoil pitching sinusoidally at small amplitude and high reduced frequencies. The circulation and peak vorticity of the vortices are varied by the cho...

We consider a Bayesian approach to the problem of inferring parameters of the SONAR environment given only the gathered sidescan image. A simpliied model of the process is developed along with suitable prior distributions on the parameters, and a sampling technique is utilised to estimate the parameters most likely given the data. As an example, we apply this technique to estimation of a step-g...

The flow regime and biogeochemical cycles are greatly affected by river damming drought, especially in ephemeral rivers. However, the combined effects have been rarely considered. This study, taking Dagu River Jiaodong Peninsula of North China as an example, investigated dynamic changes water cycle related to drought using stable isotopes for period 2018–2019. results indicated that significant...

Understanding how natural variation in flow regimes influences stream ecosystem structure and function is critical to the development of effective management policies. Spatial among streams reasonably well understood for mesic regions, but a more robust characterization arid regions needed, especially support biological monitoring assessment programs. In this paper, we used long-term (41 years)...

The migration and entrapment of dense nonaqueous phase liquids (DNAPLs) in aquifer formations is typically believed to be controlled by physical heterogeneities. This belief is based upon the assumption that permeability and capillary properties are determined by the soil texture. Capillarity and relative permeability, however, will also depend on porous medium wettability characteristics. This...

The gradually varied surface was introduced and studied in digital and discrete spaces by Chen. The basic idea of introducing gradually varied surfaces is to employ a purely discrete interpolation algorithm to fit a discrete surface when the desired surface is not required to be “smooth.” In this paper, we generalize the concept of gradually varied surfaces. A digital surface is defined as a ma...