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Your search keyword '"Luo, Wu"' showing total 12 results
Start Over Author "Luo, Wu" Journal advanced materials research
12 results on '"Luo, Wu"'

1. The Comparison Investigation of OMA Methods on Time Domain

Author

Jia Wei Xiang, Luo Wu, and Dong Di Chen

Subjects
Engineering, Cantilever, Computer simulation, business.industry, General Engineering, Signal, Operational Modal Analysis, symbols.namesake, Modal, Electronic engineering, Euler's formula, symbols, Time domain, Eigensystem realization algorithm, business, Algorithm
Abstract

Operational modal analysis (OMA) is an effective method to identify structural modal parameters from response signal under operational condition. Aiming at the evaluation of different time domain OMA methods in structural modal parameters identification, both numerical simulation and experimental investigation of cantilever beam have been applied to different methods, such as Sparse Time Domain (STD) method, Least Square Complex Exponential (LSCE) method and Eigensystem Realization Algorithm (ERA), etc. The comparison results indicated that ERA is the best one, LSCE method follows and STD method is worst.

Published
2011

2. Application of Software DYNAFORM to the Tube Forming Process with Multi-Stages

Author

Jia Wei Xiang and Luo Wu

Subjects
Hydroforming, Engineering drawing, Engineering, Tube forming, Computer simulation, business.industry, Operating procedures, General Engineering, Process (computing), Mechanical engineering, Tube bending, Software, Key (cryptography), business
Abstract

This paper introduces the software DYNAFORM which is specially used in the numerical simulation analysis of tube forming. The key components of this powerful software and the basic operating procedures are also introduced. One example of tube bending and hydroforming is simulated using this software. Based on the analyzing result, it shows that the simulation is simply and practically.

Published
2011

11. Synthesis on Spiropyran/ SrAl2O4:Eu2+,Dy3+ Photochromic Phosphor and its Solvent Effects

Author

Yu, Sheng Fei and Luo, Wu Sheng

Abstract

6-nitro-1,3',3'-trimethyl-indoline spiropyrans (SP) was synthesized, which is a photochromic compound. SP/SAO-ED composite phosphor was prepared with an organic ligand SP coated on the surface of SrAl2O4:Eu2+,Dy3+ (SAO-ED) phosphor by the interfacial coordination chemistry method. The effect of the solvent on the properties of SP/SAO-ED phosphor was investigated, and the effects of the solvent effect on the UV maximum absorption wavelength and fading kinetics of SP and SP/SAO-ED were also studied. Results showed that SP/SAO-ED composite phosphor has higher photochromic and photoluminescent properties when the prepared parameter is chloroform as solvent. The UV maximum absorption wavelength of open-loop SP and SP/SAO-ED is decreasing with the increasing of the solvent polarity, which is the negative color effect. The fading reaction kinetic equations meets with the first order reaction, and the rate constant is decreasing with the increasing of the solvent polarity.

Published
2013
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12. Preparation and Luminescence Characteristics of Li2Y4-XEux(WO4)7 Red–Emitting Phosphor

Author

Ru, Jing Jing, Guo, Juan, Luo, Wu Kui, Ye, Nan, and Xiao, Yan Chun

Abstract

A series of novel red light-emitting phosphors Li2Y4-xEux(WO4)7 were synthesized by solid-state reaction. The phosphors were characterized by XRD and luminescence spectra. The results show that the phosphors can be excited by near-UV light of 395nm effectively. The relative intensity of the sample reaches a maximum when x is 2.8. The main emission line is 5D0→7F2 transition of Eu3+ at 615nm, and they can be used for white LED.

Published
2012
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