Yifan Zhang

Study on the porpoising performance of high-speed vessels: Experimental, 3D numerical, and 2.5D numerical approach

Yifan Zhang, Shan Ma, Wenbo Shao, Yunxing Zhang et autres

cn (code pays fourni par la source)

Monolithic electric field control of a grating coupler for finely tuning wavelength, efficiency, and bandwidth

Yifan Zhang, Yongyong Zhuang, Liu Yang, Xin Liu et autres

-On-Insulator (PIN-PMN-PTOI) based apodized grating coupler through finite-difference time-domain (FDTD) simulations. By leveraging the ultrahigh electro-optic coefficient of PIN-PMN-PT single crystal, we demonstrate precise control over the effective refractive index, thereby fine-tuning the central wavelength, enhancing coupling efficiency (CE) and 3-dB bandwidth. …

hk, tw, bd, cn, de, dk (code pays fourni par la source)

An unsteady Cartesian grid based two-dimensional plus time method for simulating motion responses of high-speed vessels

Yifan Zhang, Yunxing Zhang, Shan Ma, Wenbo Shao et autres

Currently, the hydrodynamic simulation strategies for high-speed vessels exhibit a wide diversity. Direct three-dimensional (3D) Computational Fluid Dynamics simulation would be the most suitable choice if not for its time-consuming nature. To save computational resources and accelerate calculation speed, research works that …

cn (code pays fourni par la source)

Convective heat transfer characteristics from a linearly tapered cylinder at a subcritical Reynolds number

Yifan Zhang, Luyi Lu

Abstract This study conducted a numerical investigation of the flow past a linearly tapered cylinder in the subcritical flow regime. This study concentrated on the influence of this geometric perturbation on the flow and heat transfer characteristics by comparing them with those …

cn (code pays fourni par la source)

Spatiotemporal variability in the diffuse attenuation coefficient of sea ice

Zhantang Xu, Zhen Shi, Fulin Sun, Yu Xin Zhang et autres

The diffuse attenuation coefficient (Kd) is known to be closely related to the light transmittance of sea ice, which plays a critical role in the energy balance and biological processes of the upper ocean. However, the commercial instruments cannot easily measure Kd …

us, cn (code pays fourni par la source)

Numerical study on vortex-induced vibration of four circular cylinders at low Reynolds number

Yanqing Han, Yunxing Zhang, Yifan Zhang

Vortex-Induced Vibration (VIV) of multiple cylinders has received increasing attention in the ocean engineering field in recent years. In this paper, a two-dimensional numerical model for studying VIV of multiple cylinders is developed. Based on a fixed Cartesian grid with local mesh …

cn (code pays fourni par la source)

Exploring the Value of Combining Glucocorticoids with RAS Blockers and Modified Huangqi Chifeng Decoction in the Treatment of Moderate Proteinuria in IgA Nephropathy: A Propensity-Score Matching Study

Hangyu Duan, Qi Zhang, Yue Shi, Yu Zhang et autres

Abstract Objective: Utilizing propensity-score matching (PSM) to investigate the efficacy of combining glucocorticoids with Renin-Angiotensin System (RAS) blockers and Modified Huangqi Chifeng Decoction (MHCD) in treating moderate proteinuria in IgA nephropathy. Methods: Patients diagnosed with focal proliferative IgA nephropathy through renal biopsy …

cn (code pays fourni par la source)

Electromagnetically induced transparency-like effect in a lithium niobate resonator via electronic control

Liu Yang, Yongyong Zhuang, Yifan Zhang, Yaojing Zhang et autres

In this study, we theoretically proposed a method to achieve an electromagnetically induced transparency (EIT)-like effect in a whispering gallery mode resonator (WGMR) and experimentally validated the method in a lithium niobate (LN) device. Benefitting from the electro-optic and inverse piezoelectric effects …

cn, de (code pays fourni par la source)

A Cartesian grid-based two-dimensional plus time method for simulating ship bow waves

Yifan Zhang, Yunxing Zhang, Shan Ma, Wenbo Shao et autres

Numerical modeling of ship bow waves is still hard work, partly due to their multiscale features. Direct three-dimensional (3D) computational fluid dynamics simulation could be an appropriate choice to investigate the problem. However, limited by computational resources, small scale phenomena such as …

cn, fr (code pays fourni par la source)