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Wu C.-C.,Feng Chia University | Yin Y.,East China Institute of Technology | Cheng S.-R.,Cheng Shiu University
Computers and Industrial Engineering | Year: 2011

Scheduling with learning effects has received growing attention nowadays. A well-known learning model is called "sum-of processing-times-based learning" in which the actual processing time of a job is a non-increasing function of the jobs already processed. However, the actual processing time of a given job drops to zero precipitously when the normal job processing times are large. Motivated by this observation, we propose a truncation learning model where the actual job processing time is a function which depends not only on the processing times of the jobs already processed but also on a control parameter. The use of the truncated function is to model the phenomenon that the learning of a human activity is limited. Under the proposed learning model, we show that some single-machine scheduling problems can be solved in polynomial time. In addition, we further provide the worst-case error bounds for the problems to minimize the maximum lateness and total weighted completion time. © 2010 Published by Elsevier Ltd. All rights reserved. Source


Luo F.,East China Institute of Technology | Batten S.R.,Monash University
Dalton Transactions | Year: 2010

A distinct method, lanthanide(iii)-doped pathway is for the first time utilized to replace lanthanide(iii) MOFs for the access of MOF-based luminescent sensing of metal ions. The research results revealed that this strategy is highly effective and displays several outstanding features. © 2010 The Royal Society of Chemistry. Source


Liu Y.,East China Institute of Technology
RSC Advances | Year: 2014

Composites of titanium dioxide-reduced graphene oxide (TiO2-RGO) have been prepared via an efficient and facile hydrothermal reaction of graphene oxide and Ti(OH)4 in a ethanol-water solvent. The structure and composition of the composites have been characterized by X-ray diffraction, Scanning electron microscopy, Brunauer-Emmett-Teller specific area analysis, X-ray photoelectron spectroscopy and ultraviolet-visible diffuse reflectance spectroscopy. The results showed that the TiO2-RGO composites exhibited a layered structure with well-dispersed anatase TiO2 on the surface of the reduced graphene oxide. Compared with the pure TiO2 nanoparticles, the composites had larger surface area, and extended the photoresponse range to the visible light region. The photocatalytic activity of the composites was much higher than that of TiO2 in the photodegradation of methyl orange (MO) under visible light irradiation. This journal is © the Partner Organisations 2014. Source


Yin Y.,East China Institute of Technology | Cheng S.-R.,Cheng Shiu University | Wu C.-C.,Feng Chia University
Information Sciences | Year: 2012

We consider a scheduling environment with two agents and a linear non-increasing deterioration. By the linear non-increasing deterioration we mean that the actual processing time of a job belonging to the two agents is defined as a non-increasing linear function of its starting time. Two agents compete to perform their respective jobs on a common single machine and each agent has his own criterion to be optimized. The goal is to schedule the jobs such that the combined schedule performs well with respect to the measures of both agents. Three different objective functions are considered for one agent, including the maximum earliness cost, total earliness cost and total weighted earliness cost, while keeping the maximum earliness cost of the other agent below or at a fixed level U. We propose the optimal (nondominated) properties and present the complexity results for the problems addressed here. © 2011 Elsevier Inc. All rights reserved. Source


Jiang S.,East China Institute of Technology | Song S.,East China Institute of Technology
Applied Catalysis B: Environmental | Year: 2013

The catalytic performance of the supported Co3O4 on CNTs (Co3O4/CNTs) in the catalytic combustion of toluene was improved by tuning the surface structures of CNTs. The study results showed that the surface defect structures of CNTs could not only enhance the ability of Co3O4 to develop reduction/oxidation cycles, but also increase the proportion of the adsorbed oxygen species to the surface lattice oxygen ones. Thus, the defects of CNTs could improve the catalytic activity of Co3O4/CNTs and lower the complete conversion temperature of toluene. Moreover, the CO2 selectivity increased along with increasing the COOH amount of the CNTs. Therefore, by tuning the defect density and COOH amount, the conversion of toluene was completed at 257°C and the selectivity to CO2 achieved to ~100% on Co3O4/CNTs-120 catalyst, which is much better than Co3O4/Beta, Co3O4/ZSM-5 or Co3O4/SBA-15. Furthermore, compared with Pd/Beta and Pd/SBA-15 catalysts, Co3O4/CNTs showed a similar or even better catalytic performance, indicating the great potential application of Co3O4/CNT catalysts for the catalytic combustion of toluene. © 2013. Source

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