The influence of pipeline thickness and radius on guided wave attenuation in water-filled steel pipelines: Theoretical analysis and experimental measurement

2019 ◽  
Vol 145 (1) ◽  
pp. 361-371 ◽  
Author(s):  
Zhao Li ◽  
Liwen Jing ◽  
Wenjie Wang ◽  
Pedro Lee ◽  
Ross Murch
Keyword(s):  
Theoretical Analysis ◽  
Experimental Measurement ◽  
Wave Attenuation ◽  
Guided Wave

Efficient Transport Bindings for Web Service Messages

2011 ◽  
pp. 83-109
Author(s):  
Christian Werner ◽  
Carsten Buschmann ◽  
Tobias Jäcker ◽  
Stefan Fischer
Keyword(s):  
Theoretical Analysis ◽  
Web Service ◽  
Mobile Communication ◽  
Experimental Measurement ◽  
User Interaction ◽  
Low Latency ◽  
Ip Multicast ◽  
Measurement Results ◽  
Efficient Communication ◽  
Latency Analysis

Although Web service technology is being used in more and more distributed systems, its areas of application are inherently limited by high latencies and high amounts of protocol overhead. For messaging in environments with user interaction, like Web platforms for business or multimedia applications, the response time of the whole system needs to be kept in tight boundaries. In other scenarios comprising mobile communication and battery-powered devices, bandwidth-efficient communication is imperative. In this chapter we address both of these issues. First we conduct a detailed latency analysis of different transport mechanisms for SOAP and then we thoroughly investigate their protocol overhead. For both aspects we present a theoretical analysis as well as experimental measurement results. We then will introduce a new transport binding called PURE that significantly reduces the protocol overhead while featuring low latency. Furthermore it enables interesting additional features such as point-to-multipoint communication via IP multicast and broadcast.

Wet oxidation kinetics of AlAs at elevated temperatures

2003 ◽  
Vol 18 (5) ◽  
pp. 1027-1030 ◽  
Author(s):  
Sun-Chien Ko ◽  
Sanboh Lee ◽  
Hai-Lin Wang ◽  
Y. T. Chou
Keyword(s):  
Boundary Layer ◽  
Theoretical Analysis ◽  
Experimental Measurement ◽  
Oxidation Kinetics ◽  
Elevated Temperatures ◽  
Thickness Effect ◽  
Wet Oxidation ◽  
Alas Layer ◽  
Boundary Layer Diffusion ◽  
Kinetics Of

Wet oxidation in the AlAs layer sandwiched between two GaAs plates was investigated for the temperature range of 400 to 480 °C. The oxidation rate increased with increasing thickness of the AlAs layer. Theoretical analysis based on the boundary layer diffusion was performed to account for the thickness effect. The theory is in excellent agreement with the experimental measurement.

Method to Detect Bolting Devices Based on Ultrasonic Guided Wave

2012 ◽  
Vol 226-228 ◽  
pp. 1906-1909
Author(s):  
Min Hui Xu ◽  
Qiao Qian Lan ◽  
Wei Jian Jin
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Theoretical Analysis ◽  
Guided Waves ◽  
Test System ◽  
Guided Wave ◽  
Effective Length ◽  
Engineering Practice ◽  
Ultrasonic Guided Wave

Bolting devices is very popular in industrial application, this paper presents a new solution aimed at the problem faced in detecting the construction quality. The solution is based on the engineering practice, and we introduce Ultrasonic Guided Wave NDT technology in the detecting process. Under laboratory conditions, Longitudinal Guided Waves are used in detecting the bolting devices, the experimental results are consistent with the theoretical analysis. At the same time, finite element method is applied into the Numerical Simulation of the propagation of Longitudinal Guided Waves in bolts, thus a test system utilized in detecting the effective length and defects of bolts developed.

Guided Waves in Pitch-Catch Configuration: A Theoretical Framework to Steer Toward Experimental Tests

2020 ◽  
Author(s):  
Francesco Cordella ◽  
Mauro Cappelli ◽  
Francesco Bertoncini
Keyword(s):  
Theoretical Analysis ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Guided Waves ◽  
Oil And Gas ◽  
Theoretical Background ◽  
Guided Wave ◽  
Nuclear Industry ◽  
Discharge Pipe

Abstract Guided waves testing allows a long-range screening in pipes of different types and represents an effective and powerful non-destructing technique for defect detections using a limited number of points of measures. This kind of testing hence represents an appealing technique not only for the Oil and Gas industries but also for the Nuclear Industry, in particular regarding the Structural Health Monitoring of Nuclear Power Plants components. Another point of strength of this technique is that it can be applied in different configurations as the pulse-echo (the same probe is used both for transmission and signal receiving) or the pitch-catch (two symmetric probes are used one for the signal transmission and the second one for the signal receiving). In this way, the guided wave testing with magnetostrictive sensors can be reliably used for the short and long-term monitoring of Nuclear Power Plants components. The objective of this paper is to establish a strong theoretical background to pave the way for a robust experimental investigation. In particular, after the characterization through a general theoretical analysis, the focus is on a real steam discharge pipe with a high mechanical complexity used for many years in a research facility and now dismissed. The experimental method applied is the pitch-catch configuration of two magnetostrictive sensors. Preliminary experimental results conducted on a real complex steam discharge pipe are consistent with the theoretical analysis.

Torsional guided wave attenuation in piping from coating, temperature, and large-area corrosion

2012 ◽  
Vol 47 ◽  
pp. 163-170 ◽  
Author(s):  
Adam C. Cobb ◽  
Hegeon Kwun ◽  
Leonardo Caseres ◽  
George Janega
Keyword(s):  
Wave Attenuation ◽  
Guided Wave ◽  
Large Area ◽  
Coating Temperature
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