High-speed trains serving in a crosswind region are bearing more significant safety risks. Based on the three-dimensional (3D) Unsteady Reynolds-Averaged Navier–Stokes (URANS) turbulence model, Computational Fluid Dynamics (CFD) computational work was conducted present study to predict transient aerodynamic load of train. The then employed as input dynamic system perform analysis running safety...

The aim of this research work is to evaluate the effects of coolant including nano- powder material for the cooling purpose in milling process and comparing the results with the conventional coolant. Generation heat and weak heat transfer reduces the tool life and also deteriorate surface roughness during milling operation. To overcome this problem, it is necessary to use coolant for cooling as...

PURPOSE To evaluate changes over time of the anterior capsule opening size after phacoemulsification, based on haptic number and composition of three acrylic intraocular lenses (IOLs). METHODS Fifty-five patients (70 eyes) were included. All underwent phacoemulsification followed by implantation of either an acrylic IOL with two-haptic (one-piece, 26 eyes; three-piece, 22 eyes), or four-hapti...

The carbody shaking phenomenon (CSP) can greatly reduce the ride comfort of high-speed trains. To investigate abnormal vibration feature and causes CSP, extensive field measurements numerical simulations were conducted. A three-dimensional rigid-flexible coupled dynamic model a vehicle is constructed to reproduce CSP reveal key influence factors, in which finite element updated based on experim...

We introduce a generalized cake-cutting problem in which we seek to divide multiple cakes so that two players may get their most-preferred piece selections: a choice of one piece from each cake, allowing for the possibility of linked preferences over the cakes. For two players, we show that disjoint envy-free piece selections may not exist for two cakes cut into two pieces each, and they may no...