During the past few years, many researchers have demonstrated the importance of the age-related changes in spontaneous electroencephalography. However, very little research on of the event-related responses of oscilla...During the past few years, many researchers have demonstrated the importance of the age-related changes in spontaneous electroencephalography. However, very little research on of the event-related responses of oscillations connections has been used to examine the changes during normal aging. The aim of the present study was to investigate age-related changes of task-related brain oscillations, which include spectral power and omega-complexity. We hypothesized that the power and omega-complexity of the brain are affected by age-related changes, which could be observed in this study. The samples included young and healthy elderly groups. Compared to young participants, elderly participants were found to have increased power in anterior area and decreased power in posterior area, and have shown a decreased power in the alpha-1 (7 - 10 Hz) and alpha-2 (10 - 13 Hz) bands and an increased power in the delta (1 - 4 Hz) band. Elderly participants were found to have increased omega-complexity in the anterior and posterior brain areas, and have shown an increased omega-complexity in the alpha-2, beta-1 (13 - 18 Hz), and beta-2 (18 - 30 Hz) bands. The findings in this study suggest that power and omega-complexity changes in task-specific neural activity may potentially be used to assess age-related decline in the brain.展开更多
This research aims at developing a new fuzzy activity finish time estimation model for project scheduling management.With the application of the fuzzy quality function deployment (FQFD) and fuzzy analytic hierarchy pr...This research aims at developing a new fuzzy activity finish time estimation model for project scheduling management.With the application of the fuzzy quality function deployment (FQFD) and fuzzy analytic hierarchy process (FAHP) methods,the degree of fuzziness for every project activity is calculated in accordance with considerations of project uncertainties.These uncertainties are measured by the risk level of such project-related characteristics as time limit,activity start time,budget,manpower,technological difficulty,and facility requirements.In this paper,rather than applying the de-fuzzification technique to obtain the crisp activity duration for project scheduling,the fuzzy finish time estimation method for every activity is proposed based on the degree of fuzziness.The corresponding fuzzy activity duration time plot is also developed in a new fuzzy Gantt chart.The proposed model can provide a reasonable fuzzy finish time estimation for every activity,while most scheduling methods only provide the finish time of the entire project.Compared to existing models,this time estimation model and its corresponding Gantt chart are predicted to have higher reliability and practical application in project management and scheduling.展开更多
文摘During the past few years, many researchers have demonstrated the importance of the age-related changes in spontaneous electroencephalography. However, very little research on of the event-related responses of oscillations connections has been used to examine the changes during normal aging. The aim of the present study was to investigate age-related changes of task-related brain oscillations, which include spectral power and omega-complexity. We hypothesized that the power and omega-complexity of the brain are affected by age-related changes, which could be observed in this study. The samples included young and healthy elderly groups. Compared to young participants, elderly participants were found to have increased power in anterior area and decreased power in posterior area, and have shown a decreased power in the alpha-1 (7 - 10 Hz) and alpha-2 (10 - 13 Hz) bands and an increased power in the delta (1 - 4 Hz) band. Elderly participants were found to have increased omega-complexity in the anterior and posterior brain areas, and have shown an increased omega-complexity in the alpha-2, beta-1 (13 - 18 Hz), and beta-2 (18 - 30 Hz) bands. The findings in this study suggest that power and omega-complexity changes in task-specific neural activity may potentially be used to assess age-related decline in the brain.
文摘This research aims at developing a new fuzzy activity finish time estimation model for project scheduling management.With the application of the fuzzy quality function deployment (FQFD) and fuzzy analytic hierarchy process (FAHP) methods,the degree of fuzziness for every project activity is calculated in accordance with considerations of project uncertainties.These uncertainties are measured by the risk level of such project-related characteristics as time limit,activity start time,budget,manpower,technological difficulty,and facility requirements.In this paper,rather than applying the de-fuzzification technique to obtain the crisp activity duration for project scheduling,the fuzzy finish time estimation method for every activity is proposed based on the degree of fuzziness.The corresponding fuzzy activity duration time plot is also developed in a new fuzzy Gantt chart.The proposed model can provide a reasonable fuzzy finish time estimation for every activity,while most scheduling methods only provide the finish time of the entire project.Compared to existing models,this time estimation model and its corresponding Gantt chart are predicted to have higher reliability and practical application in project management and scheduling.
