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Scimitar syndrome (SS) is a rare entity with an incidence of approximately 1–3 in 200 000 people. It is typically characterized by complete or partial anomalous pulmonary venous drainage from the right lung into the systemic venous circulation, most commonly the inferior vena cava (IVC). For the first time, we report the diagnosis of SS in a fetus in utero using four‐dimensional (4D) spatiotemporal image correlation combined with high‐definition live flow rendering mode (STIC‐HD live flow). [ABSTRACT FROM AUTHOR]

In this paper, the influence on performance of radial straight blade hydraulic turbine is studied with radial meridional flow channel and mixed-flow meridional flow channel. Firstly, the theoretical models are suggested for radial straight blade hydraulic turbine. Secondly, runners are designed based on two different types of meridional flow channels. Finally, the numerical simulation is carried out for different schemes, while the performance and flow field are analyzed and compared. Results show that the two different schemes adapt to ultra-small discharge and head with large fluctuation. Moreover, the best numerical predicted efficiency is 81.4% for radial straight blade hydraulic turbine with the mixed-flow meridional flow channel, which is 1.8% more than the radial meridional flow channel. Meanwhile, with a larger conveyance capacity, the optimal efficiency is verified for the hydraulic turbine with mixed-flow meridional channel, and it can meet the needs of hydraulic energy recovery with ultra-small discharge. The conclusions serve as a reference in the design of hydraulic energy recovery turbine. [ABSTRACT FROM AUTHOR]

To meet the demands of white noise waves with different and higher energy spectral density, a new white noise wave generation method was proposed and a corresponding wave-making system controlled by a rotary valve was developed. The theoretical model of the new method was established, and the hydraulic transmission function of the wave-making system was solved. After the control parameters of the white noise waves in the wave-making system were obtained, the experiment tests were carried out to generate the white noise waves, and its energy spectral density was analyzed by Fourier analysis. The results show that white noise waves with different amplitudes have different energy spectral densities. And the energy spectral density of the generated waves is approximately a constant. Therefore, the present white noise wave generation method is feasible in marine engineering tests, and the wave with variable amplitude and higher energy spectral density can be generated. [ABSTRACT FROM AUTHOR]