When a sandstone reservoir enters the ultra-high water cut stage, oil phase changes from continuous to discontinuous, which results in difficulties further development and utilization of reservoir. It is important clarify flow law distribution state discontinuous phases guide remaining production. This study selected samples reservoirs, accurately obtained information digital core, constructed ...

This paper describes a statistical signal-processing method for exploiting narrowband bistatic RF measurements to detect and track moving people (hereafter referred to as "dismounts"). In our approach, RF measurements are made by a constellation of narrowband radar units, arranged around a surveillance region. There are several benefits of narrowband radar in this application, which we describe...

In this paper, based on MSC Simufact.Forming v16.0 simulation software, the process parameters in multi-pass spinning production of deep cylinders with a large diameter–thickness ratio are optimized, and ten-pass cylinder diameter 500 mm, thickness 2 mm depth 700 is realized. By controlling four mandrel speed, feed rate, wheel fillet radius angle attack, influence force wall deviation formed wo...

In this note we examine fluid violent kinematics in a plunging breaker. The motion is computed the frame of potential flow theory. basically generated by forcing rectangular tank, starting from rest. When sufficient level energy injected fluid, free surface has highly nonlinear behavior, here vicinity main tip crest, sharp corner (cusp) appears along barrel. appearance critical jet described an...

five cases of giant cell tumor of the lower end of radius are reported. three of the patients were women and two were men, the youngest of the patients was 18 years old and oldest 37 years. en bloc resection followed by reconstructive procedures were performed in three of the cases with good results.

This paper investigates the effect of rotor-stator spacing and operating conditions on compressor performance interaction mechanism. We focus between rotor wake stator’s flow field through several unsteady numerical simulations aiming at a transonic stage in equal radius path with two-axial three conditions. The simulation results indicate that time-averaged efficiency almost declined by 0.6 po...

(1) MICHAEL LENNARD 1923-1986 In his Obituary to Michael Lennard printed in our August number Donald Ratcliffe referred to his love of art and literature. He was a brilliant parodist and we reprint below with kind permission two excerpts from a contribution he made as a student to the 'Black Bag'. The theme was 'hernia' and readers will recognise echoes of Browning's 'Home thoughts from abroad'...

We will never have enough data, so we must do the best with what we acquire. Systematic reviews and meta-analyses of clinical trials represent one approach to maximizing the usefulness of clinical data. The Cochrane Collaboration thrives on the analyses of the results of tens of thousands of controlled trials in its database. The Collaboration bears the name of the British epidemiologist Archib...