14,634 research outputs found
Experimental Study of Noise Reduction and Improved Cooling Fan Performance in a PDP TV
No full textThe present experimenral study addresses fan system noise reduction and improvement in cooling performance in a plasma display panel(PDP) television (TV), The broadband noisr in a PDP TV is closely related to system losses. The system losses, mainly due to rear case of the TV near the fan, are reducced by increasing the number of vent holes in the case, preventing secindary leajage flow between the fan and the case and modifying the reat case shape. The discrete noise is mainly related with the inflow conditions therefore, the removal of structures that distort inflow results in a discrete noise reduction. Additionally, the fan rotationg speed is reduced because of the increased flow rate and reduced flow fluctuaion, shich is obtained from the reduction of system loss(resistance). 7.3dB(A) noisr reduction and a 10% increase in flow rate are achieved. rhe manin concepts behind realizing noise reduction are prevention of recirculation flow around rhe fan and reduction of sysrem loss.. The author wish to acknowledge the financial wupport of LG Electronics, Inc., and useful discussions with Dr, Suk Kwan Kim at LG-PRC
Edge preserving vector quantization using self-organizing map based on adaptive learning
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Author Correction: Evaluation of skin cancer resection guide using hyper‑realistic in‑vitro phantom fabricated by 3D printing
No full textThe original version of this Article contained an error in the spelling of the author Taehun Kim which was incorrectly given as Teahun Kim. The original Article has been corrected
Experimental analysis of CO/H-2 syngas with NOx and SOx reactions in pressurized oxy-fuel combustion
No full textA pressurized oxy-fuel combustion system is a technology for carbon capture and storage with a low efficiency penalty. In this study, the characteristics of combustion, heat transfer, and NOx/SOx emissions at various pressures were investigated using a lab-scale pressurized oxy-fuel combustion system. A gaseous fuel, composed of CO and H-2 , and pure oxygen were considered. The internal flue gas recirculation was induced by the inner wall to control the high oxy-flame temperature. The total heat recovery rate determined using the water jacket is 3% higher at 10 barg compared with atmospheric conditions, although the combustion temperature is lower. The heat flow rate increased by a higher H2O fraction in flue gas because the emissivity of H2O is higher than that of CO2. Under the condition of low H2O in flue gas, NOx and SOx simultaneously decreased, by approximately 50% and 63% at 10 barg, respectively. The concentrations of NOx and SOx with a higher H2O contents condition in flue gas decreased by 87% and 93% respectively at 10 barg, compared with atmospheric conditions. The effects of H radicals and the H2O fraction on the NOx and SOx oxidation and decrease were identified. (C) 2020 Elsevier Ltd. All rights reserved.11Nsciescopu
Development of a human arm-liked robotic surgical system with force measurement for laparoscopic surgery
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Performance comparison of composite signal detectors in additive and signal-dependent noise
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