PURPOSE To design a proton MR spectroscopy ((1) H-MRS) localization sequence that combines the signal-to-noise-ratio (SNR) benefits of point resolved spectroscopy (PRESS) with the high pulse bandwidths, low chemical shift displacements (CSD), low specific absorption rates (SAR), short echo times (TE), and superior radiofrequency transmit field (B1+) immunity of stimulated echo acquisition mode ...

lectrical and electromagnetic methods are a natural addition to the toolbox of a development and production geophysicist because formation resistivity is a strong function of the reservoir fluid saturation and temperature. Unfortunately, the high degree of cultural noise in developed oil fields has limited the use of surface electrical techniques, and the preponderance of steel well casings has...

Laboratory measurements of the effects of steam injection on the electrical conductivity of sands can aid in the interpretation of electrical surveys used to monitor subsurface steam-injection projects. The effect of variations in injected steam quality was measured in the experiments presented here. The injection of low-quality steam, boiled from a 0.01 mol/L NaCl solution, into clean sand sat...

This study investigates a multistream phone recognition system, which consists of 21 parrallel sub-systems, each covers two critical bands, and fused by a multi-layer perceptron (MLP) system. Within each band, speech information is encoded by the frequency-domain linear prediction (FDLP) feature, which characterizes the temporal modulation of subband envelope. Two experiments are conducted to d...

The effect of clay content on the electrical response of steamflooded geologic material is studied using a combination of laboratory experiments and numerical simulations. The presence of clay can increase the conductivity of a steam zone by providing a surface conduction path that is enhanced strongly by temperature increases. Clay also increases the residual water saturation in a steam zone, ...

Steam generator (SG) tubing in nuclear plant offers a barrier between the radioactive material and steam. Effective NDT of the SG tubing is mandatory to ensure the safe operation of nuclear power plants. Multi-frequency eddy current (EC) NDT is being exercised in the nuclear industry. Detection and subsequent crack profiling from the acquired EC signals is a challenging task once dealt with sub...

Most electric power is produced by steam turbines. This is because the steam cycle is well suited to the conversion of heat to work and steam turbines can be built in a wide range of capacities up to about 1500 MW. Steam turbines are basically very simple having fixed blades to accelerate the steam and moving blades to absorb the resulting kinetic energy. The moving blades are mounted on a rota...

The low frequency noise from heat recovery steam generator (HRSG) makes dominant contribution to the noise on the boundary of plant, which generation mechanism is investigated in this presentation. The non-stationary flow field and aeroacoustic noise is studied with hybrid numerical simulation, which is comprised of CFD method based on Large Eddy Simulation (LES) and acoustic analogy by using F...