Based on the three dimensional potential theory, numerical studies were carried out to investigate the hydrodynamics of a single-acting trapezoidal pendulum wave energy converter in regular waves by using time domain analysis. The nonlinear viscous damping was also taken into account, and the influence of power take-off damping on the motion responses and output performances were analyzed. Comparisons of experimental and numerical results were performed as part of the validation process.
Linearized potential wave theory is applied to calculate the wave exciting loads on a CALM buoy in water of finite depth. The solution is based on the domain decomposition method and the unknown constants in the velocity potentials are determined by matched eigenfunction expansions. A comparison of the analytical solution with published experimental results on a vertical truncated cylinder is performed as part of the validation process. The effects of the disk on the wave exciting forces are discussed.
This experiment was to develop a new kind of chewable tablet with white ginseng and blueberry. Firstly,get ginseng extracts from selective white ginseng by ultrasonic and freeze drying, and get blueberry juice powder from blueberries by squeezing and spray drying. Secondly, these two kinds of powder were pressed into tablets with starch, xylitol, etc as the auxiliary materials, and 40% alcohol as wetting agents. The optimum process conditions and formula were determined by single factor and orthogonal tests. The results show that the content of ginseng extracts, blueberry juice powder, starch, and 40% of ethanol should be 15%, 35%, 20%, 40% respectively in the best formula.
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