In the context of an aging population, the promotion of time banking as a new model of voluntary service can help alleviate the ever–increasing pressures for elderly care and services in China. The development of tim...In the context of an aging population, the promotion of time banking as a new model of voluntary service can help alleviate the ever–increasing pressures for elderly care and services in China. The development of time banking in China has successively undergone the stage of traditional practice, the stage of infancy and exploration, as well as the stage of accelerated growth. Meanwhile, this process has also witnessed the formation of many localized innovations. To further the localization and innovation of time banking, this paper analyzes its basis in traditional culture, summarizes its process of practice and explores new directions of future innovation. Based on the summary of existing problems, this paper proposes to enhance the recognition of time banking among the public, facilitate localized innovation of time banking, promote its informatization, and involve the participation of young people, particularly college students.展开更多
针对支持IABA(Interference-Aware Bus Arbiter)总线的多核共享缓存能耗问题,提出了一种基于bank-column缓存划分的多核共享缓存能耗优化方法.该方法在保证硬实时任务能够在截止期前完成的前提下,通过优化bank-column缓存划分来减少共...针对支持IABA(Interference-Aware Bus Arbiter)总线的多核共享缓存能耗问题,提出了一种基于bank-column缓存划分的多核共享缓存能耗优化方法.该方法在保证硬实时任务能够在截止期前完成的前提下,通过优化bank-column缓存划分来减少共享缓存能耗.实验结果表明,在保证硬实时任务能够在截止期前完成的前提下,提出的优化方法能够减少共享缓存能耗,与优化路-组缓存划分相比,35nm制造工艺时至少能够减少约10%的共享缓存能耗.展开更多
Introduction:Older adults are prone to high levels of depression due to their deteriorating physical functions and shrinking social networks after retirement.Volunteering as an important social activity is essential f...Introduction:Older adults are prone to high levels of depression due to their deteriorating physical functions and shrinking social networks after retirement.Volunteering as an important social activity is essential for alleviating depression by building social network.This paper aims to examine the effect of volunteering on depression among older adults by using China Longitudinal Aging Social Survey(CLASS 2018)data.Methods:This study uses descriptive analysis and chi-square tests to show differences in demographic factors of older adults’volun-teerism participation,followed by bivariate correlation analysis to examine the correlation between the vital vari-ables.Afterward,stratified linear regression analysis is used to research the significant level and impact between volunteering and degree of expertise,frequency,and variety of participation.Results:8,459 older adults are included in study.The research reveals that older adults who are younger,live in urban areas,are married,or have a higher degree of education tend to have fewer depressive symptoms.Meanwhile,participation in volun-teering(OR=0.90,95%CI:0.8,1.1,p<0.001),as well as that demands specialized skills(OR=0.51,95%CI:0.30,0.2,p<0.001),more frequency of participation(OR=1.85,95%CI:1.53,2.18,p<0.001),and a wider variety of activities(OR=0.21,95%CI:0.12,0.29,p<0.001),all have a positive influence on depression levels.Discussion/Conclusion:Older adults who participate in voluntary services have lower depression symptoms and should be encouraged to use their professional skills and increase participation frequency and variety in this process.This article suggests that governments should help older adults participate in voluntary services by time bank which will further strengthen social ties,rebuild social networks and alleviate depression symptoms of older adults.展开更多
This paper proposes a wavelet based receiver structure for frequency-flat time-varying Rayleigh channels, consisting of a receiver front-end followed by a Maximum A-Posteriori (MAP) detector. Discretization of the rec...This paper proposes a wavelet based receiver structure for frequency-flat time-varying Rayleigh channels, consisting of a receiver front-end followed by a Maximum A-Posteriori (MAP) detector. Discretization of the received continuous time signal using filter banks is an essential stage in the front-end part, where the Fast Haar Transform (FHT) is used to reduce complexity. Analysis of our receiver over slow-fading channels shows that it is optimal for certain modulation schemes. By comparison with literature, it is shown that over such channels our receiver can achieve optimal performance for Time-Orthogonal modulation. Computed and Monte-Carlo simulated performance results over fast time-varying Rayleigh fading channels show that with Minimum Shift Keying (MSK), our receiver using four basis functions (filters) lowers the error floor by more than one order of magnitude with respect to other techniques of comparable complexity. Orthogonal Frequency Shift Keying (FSK) can achieve the same performance as Time-Orthogonal modulation for the slow-fading case, but suffers some degradation over fast-fading channels where it exhibits an error floor. Compared to MSK, however, Orthogonal FSK provides better performance.展开更多
文摘In the context of an aging population, the promotion of time banking as a new model of voluntary service can help alleviate the ever–increasing pressures for elderly care and services in China. The development of time banking in China has successively undergone the stage of traditional practice, the stage of infancy and exploration, as well as the stage of accelerated growth. Meanwhile, this process has also witnessed the formation of many localized innovations. To further the localization and innovation of time banking, this paper analyzes its basis in traditional culture, summarizes its process of practice and explores new directions of future innovation. Based on the summary of existing problems, this paper proposes to enhance the recognition of time banking among the public, facilitate localized innovation of time banking, promote its informatization, and involve the participation of young people, particularly college students.
文摘针对支持IABA(Interference-Aware Bus Arbiter)总线的多核共享缓存能耗问题,提出了一种基于bank-column缓存划分的多核共享缓存能耗优化方法.该方法在保证硬实时任务能够在截止期前完成的前提下,通过优化bank-column缓存划分来减少共享缓存能耗.实验结果表明,在保证硬实时任务能够在截止期前完成的前提下,提出的优化方法能够减少共享缓存能耗,与优化路-组缓存划分相比,35nm制造工艺时至少能够减少约10%的共享缓存能耗.
基金supported the China National Social Science Fund Item[20ZDA076].
文摘Introduction:Older adults are prone to high levels of depression due to their deteriorating physical functions and shrinking social networks after retirement.Volunteering as an important social activity is essential for alleviating depression by building social network.This paper aims to examine the effect of volunteering on depression among older adults by using China Longitudinal Aging Social Survey(CLASS 2018)data.Methods:This study uses descriptive analysis and chi-square tests to show differences in demographic factors of older adults’volun-teerism participation,followed by bivariate correlation analysis to examine the correlation between the vital vari-ables.Afterward,stratified linear regression analysis is used to research the significant level and impact between volunteering and degree of expertise,frequency,and variety of participation.Results:8,459 older adults are included in study.The research reveals that older adults who are younger,live in urban areas,are married,or have a higher degree of education tend to have fewer depressive symptoms.Meanwhile,participation in volun-teering(OR=0.90,95%CI:0.8,1.1,p<0.001),as well as that demands specialized skills(OR=0.51,95%CI:0.30,0.2,p<0.001),more frequency of participation(OR=1.85,95%CI:1.53,2.18,p<0.001),and a wider variety of activities(OR=0.21,95%CI:0.12,0.29,p<0.001),all have a positive influence on depression levels.Discussion/Conclusion:Older adults who participate in voluntary services have lower depression symptoms and should be encouraged to use their professional skills and increase participation frequency and variety in this process.This article suggests that governments should help older adults participate in voluntary services by time bank which will further strengthen social ties,rebuild social networks and alleviate depression symptoms of older adults.
文摘This paper proposes a wavelet based receiver structure for frequency-flat time-varying Rayleigh channels, consisting of a receiver front-end followed by a Maximum A-Posteriori (MAP) detector. Discretization of the received continuous time signal using filter banks is an essential stage in the front-end part, where the Fast Haar Transform (FHT) is used to reduce complexity. Analysis of our receiver over slow-fading channels shows that it is optimal for certain modulation schemes. By comparison with literature, it is shown that over such channels our receiver can achieve optimal performance for Time-Orthogonal modulation. Computed and Monte-Carlo simulated performance results over fast time-varying Rayleigh fading channels show that with Minimum Shift Keying (MSK), our receiver using four basis functions (filters) lowers the error floor by more than one order of magnitude with respect to other techniques of comparable complexity. Orthogonal Frequency Shift Keying (FSK) can achieve the same performance as Time-Orthogonal modulation for the slow-fading case, but suffers some degradation over fast-fading channels where it exhibits an error floor. Compared to MSK, however, Orthogonal FSK provides better performance.
