Service-oriented coordination mechanism is adopted during the process of constructing IADS (Intelligent autonomous decentralized system) and thus an SMGIAC (SoftMan group intelligent autonomous coordination) model is proposed. Services community integrated with GP (Global planning), role-based service discovering/binding strategy is applied to constructing the service-oriented tuple space to pr...

The nonconstant concrete flow due to the alternating pumping of twin cylinder hydraulic pump will cause vibration trucks. Furthermore, discontinuous caused by inadequate suction and air doping exacerbate vibration. In order study effect on dynamic response vibrational stability whole vehicle, multi-fluid models with concrete-lubrication gas for straight elbow pipes are established, respectively...

The present study focuses on finding an economic design of nozzles used in water discharge lines. An analytical solution is reached for computing the pipe-nozzle diameter ratio achieving minimum pipe cost using derivative method. derived equation shows that at a particular ratio, CP minimum. However, this evident from worked illustrative example. On comparison basis between and conventional one...

A new monitoring approach for detecting, locating, and quantifying structurally weak reaches of steel-lined pressure tunnels and shafts is presented. These reaches arise from local deterioration of the backfill concrete and the rock mass surrounding the liner. The change of wave speed generated by the weakening of the radial-liner supports creates reflection boundaries for the incident pressure...

Pipe flow problems are important in transportation of wastewater, oil lines and supply water. In this study, a non-Newtonian fluid model is discussed numerical CFD solution presented for geometry. The effects on velocity, pressure, dynamic viscosity cell Reynolds number different parameters inside the pipe. Power Law function considered analyses.

The in situ spraying method is widely used because of its advantages as a trenchless pipeline repair technology, including fast construction speed and close bonding between the lining layer reinforced concrete pipe. However, current research on high-performance spray materials, bearing capacity pipelines before after repair, failure modes two interfaces insufficient. Through laboratory tests de...

On 6 July 2004, two parallel-running gas pipelines (18-inch and 24-inch diameters), in the main transmission network of SNGPL (a gas company in Pakistan) were ruptured. The ruptures occurred in the early hours of the morning about 8 miles downstream of the compressor station AC-4. The ruptures were indicated by the increased gas flow at the outlet of AC-4 [1], first at about 0648 hours and then...