An optical fiber transducer able to work in high temperature environments is experimentally demonstrated in the laboratory. It is based on a permanent long period grating (LPG) written using a new technique based on a thermo-mechanical approach. Device precision was experimentally checked by means of repetitive thermal cycles between 25 and 950 °C. In addition device stability was assured by ma...

Wireless sensor network (WSN) enhanced the process of monitoring many environmental phenomena such as the air pollution monitoring issue in proposed this paper. In this paper, a WSN based microcontroller equipped with gas sensors have been actively used for air quality monitoring. The design included several units mainly: Arduino Microcontroller, MQ-2 Gas Sensors, and the current regulator circ...

A computer based model has been developed by HSE for quantified risk assessment of above ground LPG installaty ions, initially for vessels up to 300 te. A representative set of events and their associated frequencies has been used to predict individual and societal risk levels. Sensitivity studies indicate that the BLEVE event frequency and, to a lesser extent, fireball mass have most significa...

Thermal performance of three different types of liquefied petroleum gas (LPG) domestic cooking burners, i.e. a conventional radial flow, a vertical flow and a swirling flow were analyzed by means of Particle Image Velocimetry (PIV). PI V diagnostics can explain the burners’ performance from their corresponding flow fields at an impingement area. With the difference of flow patterns, larger atta...

In this paper, the control scheme of a Liquefied Petroleum Gas (LPG)–diesel dual-fuel engine with electronic control is illustrated, the external characteristics and load characteristics of the LPG– diesel dual-fuel engine and the diesel engine are compared and analyzed. The experimental results show that, compared with diesel, the output performance of dual fuel is not reduced, while smoke emi...

The ultimate objective in planning is to construct plans for execution. However, when a plan is executed in a real environment it can encounter differences between the expected and actual context of execution. These differences can manifest as divergences between the expected and observed states of the world, or as a change in the goals to be achieved by the plan. In both cases, the old plan mu...

Planning as heuristic search is a powerful approach to solving domain independent planning problems. In recent years, various successful heuristics and planners like FF, LPG, FAST DOWNWARD or SGPLAN have been proposed in this context. However, as heuristics only estimate the distance to goal states, a general problem of heuristic search is the existence of plateaus in the search space topology ...

With this has come the development of a cohort of patients, presenting with non-specific symptoms associated with overexposure to LPG. This is commonly referred to as ‘Gas Geyser Syndrome’, but this has also beenused to describe cases of carbon monoxide (CO) exposure [2]. What further confounds the diagnosis, is the fact that the spectrum of symptoms closely mimics that of the exposure to other...

An optical fibre transducer able to work in high temperatures environments is experimentally demonstrated in the laboratory. It is based on a permanent Long period gratings (PLPG) written using a thermo-mechanical technique. The fabrication technique, the experimental works, their results and the conclusions are presented and discussed in this paper.

In this paper, an approach of principal component analysis (PCA) with local pixel grouping (LPG) is used to de-noising the noisy historical document image. This technique ensures the preservation of historic document image local structure. This is due to block matching based LPG which carries out classification to allow only the sample blocks with similar contents used in the calculation for PC...