The study on the mechanical response of deep rock under hydromechanical couplings condition can guide safe excavation and stability evaluation tunnel engineering. effects monotonic loading cyclic properties granite 5 MPa pore water pressure 10 confining were studied by laboratory tests. Before peak stress, permeability was significantly higher than that loading, increased sharply after stress. ...

To realize parameter feedback optimization of tunnel construction in water-rich areas, a analysis method for parameters under fluid–solid coupling conditions was established based on an intelligent algorithm. Firstly, the numerical calculation model and solved using model. In orthogonal design analysis, displacement surrounding rock pore water pressure distribution different mass combinations w...

abstract   background: the pathophysiology of carpal tunnel syndrome is associated with increased intracarpal canal pressure. recently, palmaris longus has been introduced as an independent risk factor for the development of carpal tunnel syndrome. the purpose of this study was to assess the association of carpal tunnel syndrome with the presence of palmaris longus tendon and functional superfi...

Objective: The aim of this study is to describe the use of the PSSD (Pressure specified sensory Device) for the diagnosis of carpal tunnel syndrome. Methods: The PSSD is a tool that incorporates a pressure transducer with two prongs, linked to a computer capable of measuring the cutaneous pressure thresholds. The patients were divided in two groups: Group 1patients neither with superior limb ne...

A new approach based on a Generalized Regression Neural Network (GRNN) has been proposed to predict the planform surface pressure field on a wing-tail combination in low subsonic flow. Extensive wind tunnel results were used for training the network and verification of the values predicted by this approach. GRNN has been trained by the aforementioned experimental data and subsequently was used ...

surface-piercing propellers (spps) have been widely used in high speed craft due to some desirable features such as high efficiency, omission of resistance of equipment attached to the propeller and proper functioning of cavitation. unlike the submerged propellers, theoretical methods have no significant application on simulation of sppsbecause of problems related to modeling of these propeller...

INTRODUCTION Estimating groundwater inflow into a tunnel before and during the excavation process is an important task to ensure the safety and schedule during the underground construction process. CASE DESCRIPTION Here we report a case of the forecasting and prevention of water inrush at the Jinping II Hydropower Station diversion tunnel groups during the excavation process. The diversion tu...

The simplified Bernoulli relationship appears to be quite accurate for predicting gradients across discrete valvular obstructions. Controversy exists about how accurately it predicts the severity of disease in longer segment obstructions. In this study we constructed a pulsatile model of subvalvular pulmonary stensosis in vitro to study nine custom-made subvalvular tunnels 2, 4, and 7 mm in len...

Wind tunnel is a test facility used to simulate the flight conditions. It allows us to make a reusable prototype and test it in the tunnel in low cost. Hypersonic wind tunnels operate at hypersonic speeds ie, with a mach number greater than 6. For doing experiments, it is necessary to maintain a constant pressure in the settling chamber of the tunnel so that we get the desired mach number and m...