scholarly journals Experimental Research Testbeds for Large-Scale WSNs: A Survey from the Architectural Perspective

2015 ◽  
Vol 11 (3) ◽  
pp. 630210 ◽  
Author(s):  
Hiecheol Kim ◽  
Won-Kee Hong ◽  
Joonhyuk Yoo ◽  
Seong-eun Yoo
Keyword(s):  
Experimental Research ◽  
Large Scale ◽  
Architectural Perspective

Development and Calibration of a Large-scale Rainfall Simulator for the Urban Flood Experimental Research

2017 ◽  
Vol 17 (6) ◽  
pp. 433-441
Author(s):  
Tae Sung Cheong ◽  
◽  
Hyeonseok Choi ◽  
Teakjo Ko ◽  
◽  
...  
Keyword(s):  
Experimental Research ◽  
Large Scale ◽  
Rainfall Simulator ◽  
Urban Flood

Experimental Research on Self-Alignment Design Principle of a Large-Scale Precise Machine Bed

2010 ◽  
Vol 102-104 ◽  
pp. 306-310
Author(s):  
Zhan Hui Yan ◽  
Yi Cao ◽  
Jun Yi Yu
Keyword(s):  
Experimental Research ◽  
Machine Tools ◽  
Thermal Deformation ◽  
Large Scale ◽  
Design Principle ◽  
Simulation Experiment ◽  
Good Precision ◽  
Key Points ◽  
Machined Parts ◽  
Precise Machine

In order to eliminate thermal deformation of large-scale precise machine tools caused by ambient temperature change, self-alignment design principle and key points are proposed for a large-scale precise machine tools, Self-alignment simulation experiment, machined parts experiment and compared results for self-alignment rail grinder and other similar products are analysed, the present analysis show that self-alignment rail grinder has many advangtages of good precision, straightness stability.

Experimental Research of Shrinkage in Thick Concrete Elements

2015 ◽  
Vol 1106 ◽  
pp. 122-127
Author(s):  
Jan L. Vítek ◽  
David Čítek ◽  
Petr Tej
Keyword(s):  
Numerical Analysis ◽  
Experimental Research ◽  
Large Scale ◽  
Concrete Structures ◽  
Heat Of Hydration ◽  
Experimental Results ◽  
Thick Wall ◽  
Floor Slab ◽  
Scale Models ◽  
Concrete Elements

At the construction of complex concrete structures of the laser centre, the client required verification of casting procedures on large scale models. Models of the thick floor slab and of the thick wall were built in the scale 1:1, where the temperatures induced by heat of hydration and shrinkage strains were measured. The results of the experiments showed that the measured strains were larger than those expected on the basis of prediction according to European codes. Experimental results were compared with the results of numerical analysis.

scholarly journals The Analysis of the Possibility of Feeding a Liquid Catalyst to a Coal Dust Channel

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8521
Author(s):  
Zdzisław Bielecki ◽  
Marek Ochowiak ◽  
Sylwia Włodarczak ◽  
Andżelika Krupińska ◽  
Magdalena Matuszak ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Experimental Research ◽  
Lower Energy ◽  
Power Plants ◽  
Large Scale ◽  
Coal Dust ◽  
Exhaust Gases ◽  
Flow Parameters ◽  
Channel Outlet

This article presents the concept of a method of improving the dynamics of combustion in boilers operating in power plants, cogeneration plants, and heating plants by introducing a catalyst that is fed with a carrier in the form of droplets. Thanks to the proposed method, a greater degree of fuel burnout can be obtained, which, in turn, results in lower energy consumption in the case of producing the same amount of power. The parameters of the emitted exhaust gases and ash are also improved. The method described in the article involves the adding of a catalyst to the dust pipe of the boiler, which improves the combustion parameters. The catalyst was implemented using a sprayer/nebulizer. In order to obtain the correct flow parameters, the sprayer was modeled using CFD calculations. The calculations include trajectories, velocities and concentrations with regards to various flow parameters. Particular attention should be paid to the model of the evaporation of moving droplets. The results of these calculations enable the parameters that guarantee that the catalyst reaches the dust channel outlet in the desired form to be assessed. The analysis is an introduction to experimental research that is carried out on a medium and large scale.

scholarly journals Experimental Study on Echo Characteristics of Multistatic Large-Scale Underwater Complex Target

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Zhu Ling-Guo ◽  
Zhao An-Bang ◽  
Liu Wen-zhang ◽  
Han Jing ◽  
Wang Shu-tao ◽  
...  
Keyword(s):  
Experimental Study ◽  
Experimental Research ◽  
Large Scale ◽  
Acoustic Scattering ◽  
Strong Reflection ◽  
Important Sign ◽  
Measurement And Evaluation ◽  
Complex Target ◽  
Scaled Models

Target acoustic scattering is the primary characteristic of target echo stealth performance, and it is an important sign of the viability of large-scale complex targets underwater. In a test band, owing to the superposition of scattered waves and the elastic echo produced by shells, liquid tanks, partition plates, ribs, etc., a target exhibits an extremely complex echo phenomenon. Accurate measurement and evaluation of the acoustic scattering characteristics of underwater complex targets can be achieved via experimental research on the echo characteristics of large-scale scaled models. In this study, the contribution and regularity of the strong reflection source of underwater complex targets in various azimuths, structures, and locations were analyzed quantitatively as a basis for in-depth research and understanding of the echo characteristics of underwater complex targets.

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