There are many reservoirs in China,and serious reservoir sedimentation affects reservoir function and reservoir safety.It is of great significance for restoring the reservoir capacity,improving the efficiency of the r...There are many reservoirs in China,and serious reservoir sedimentation affects reservoir function and reservoir safety.It is of great significance for restoring the reservoir capacity,improving the efficiency of the reservoir and prolonging the service life of the reservoir to carry out the research on reservoir sedimentation control and storage capacity recovery technology,in the case of fewer and fewer good dam sites suitable for the construction of the reservoir and the increasing accumulation of reservoir sedimentation.In this paper,influence factor of the storage loss,sedimentation control and reservoir capacity recovery technology in China are briefly reviewed.It is necessary to carry out research work on reservoir sedimentation investigation and reservoir siltation mechanism and control measures.展开更多
This paper is a first pioneering attempt to apply the concept of resilience to the analysis of the public finance systems of local governments, a concept already used and ＂abused＂ in various disciplines and fields o...This paper is a first pioneering attempt to apply the concept of resilience to the analysis of the public finance systems of local governments, a concept already used and ＂abused＂ in various disciplines and fields of science. In particular, it proposes an attempt to estimate the recovery capacity of Italian Municipalities in a crucial period of our country＇s financial history, between 1992 and 2000, or between the currency crisis and the introduction of the Euro. However, the analysis also involved the subsequent trends, in order to demonstrate that the current vulnerability of the municipal public finance system, in particular of the Municipalities of Southern Italy, depends not only on the economic cycle but also on the continuous and incessant changes in the financing mechanisms of local governments established by the central government. The analysis showed a lower financial resilience of the Municipalities of the Mezzogiorno （island and continental） compared to those of the Center-North. The determinants of this phenomenon were found, for one part, through the analysis of the financial data of the Italian Municipalities - as presented by the SVIMEZ in its annual reports on the economy of the Mezzogiomo - and, for another part, through the critical synthesis of significant economic events which occurred during the period examined.展开更多
Oscillating field stimulation(OFS)with regular alterations in the polarity of electric current is a unique,experimental approach to stimulate,support,and potentially guide the outgrowth of both sensory and motor nerve...Oscillating field stimulation(OFS)with regular alterations in the polarity of electric current is a unique,experimental approach to stimulate,support,and potentially guide the outgrowth of both sensory and motor nerve fibers after spinal cord injury(SCI).In previous experiments,we demonstrated the beneficial effects of OFS in a 4-week survival period after SCI.In this study,we observed the major behavioral,morphological,and protein changes in rats after 15 minutes of T9 spinal compression with a 40 g force,followed by long-lasting OFS(50μA),over a 8-week survival period.Three groups of rats were analyzed:rats after T9 spinal compression(SCI group);SCI rats subjected to implantation of active oscillating field stimulator(OFS+SCI group);and SCI rats subjected to nonfunctional OFS(nOFS+SCI group).Histopathological analysis of spinal tissue indicated a strong impact of epidural OFS on the reduction of tissue and myelin loss after SCI in the segments adjacent to the lesion site.Quantitative fluorescent analysis of the most affected areas of spinal cord tissue revealed a higher number of spared axons and oligodendrocytes of rats in the OFS+SCI group,compared with rats in the SCI and nOFS+SCI groups.The protein levels of neurofilaments(NF-l),growth-associated protein-43(marker for newly sprouted axons),and myelin basic protein in rats were signifiantly increased in the OFS+SCI group than in the nOFS+SCI and SCI groups.This suggests a supporting role of the OFS in axonal and myelin regeneration after SCI.Moreover,rats in the OFS+SCI group showed great improvements in sensory and motor functions than did rats in the nOFS+SCI and SCI groups.All these findings suggest that long-lasting OFS applied immediately after SCI can provide a good microenviroment for recovery of damaged spinal tissue by triggering regenreative processes in the acute phase of injury.展开更多
Concentrating Solar Power(CSP)plants offer a promising way to generate low-emission energy.However,these plants face challenges such as reduced sunlight during winter and cloudy days,despite being located in high sola...Concentrating Solar Power(CSP)plants offer a promising way to generate low-emission energy.However,these plants face challenges such as reduced sunlight during winter and cloudy days,despite being located in high solar radiation areas.Furthermore,their dispatch capacities and yields can be affected by high electricity consumption,particularly at night.The present work aims to develop an off-design model that evaluates the hourly and annual performances of a parabolic trough power plant(PTPP)equipped with a waste heat recovery system.The study aims to compare the performances of this new layout with those of the conventional Andasol 1 plant,with the aim of assessing the improvements achieved in the new design.Based on the results,it can be concluded that the new layout has increased the annual generated power to almost 183 GWh(an increase of about 7.60% is achieved compared to the Andasol 1 layout that generates 169 GWh annually).Additionally,the proposed installation has achieved an efficiency of 20.55%,which represents a 7.87% increase compared to the previous design(19.05%).The Levelized Cost of Electricity(LCOE)of the new layout has been reduced by more than 5.8% compared to the Andasol 1 plant.Specifically,it has decreased from 13.11 to 12.35 c/kWh.This reduction in LCOE highlights the improved cost-effectiveness of the newlayout,making it amore economically viable option for generating electricity compared to the conventional Andasol 1 plant.展开更多
基金Supported by National Key R&D Plan(2017YFC0405201,2018YFC0407404)Achievements Transformation Project of China Institute of Water Resources and Hydropower Research(SE10003A012017)
文摘There are many reservoirs in China,and serious reservoir sedimentation affects reservoir function and reservoir safety.It is of great significance for restoring the reservoir capacity,improving the efficiency of the reservoir and prolonging the service life of the reservoir to carry out the research on reservoir sedimentation control and storage capacity recovery technology,in the case of fewer and fewer good dam sites suitable for the construction of the reservoir and the increasing accumulation of reservoir sedimentation.In this paper,influence factor of the storage loss,sedimentation control and reservoir capacity recovery technology in China are briefly reviewed.It is necessary to carry out research work on reservoir sedimentation investigation and reservoir siltation mechanism and control measures.
文摘This paper is a first pioneering attempt to apply the concept of resilience to the analysis of the public finance systems of local governments, a concept already used and ＂abused＂ in various disciplines and fields of science. In particular, it proposes an attempt to estimate the recovery capacity of Italian Municipalities in a crucial period of our country＇s financial history, between 1992 and 2000, or between the currency crisis and the introduction of the Euro. However, the analysis also involved the subsequent trends, in order to demonstrate that the current vulnerability of the municipal public finance system, in particular of the Municipalities of Southern Italy, depends not only on the economic cycle but also on the continuous and incessant changes in the financing mechanisms of local governments established by the central government. The analysis showed a lower financial resilience of the Municipalities of the Mezzogiorno （island and continental） compared to those of the Center-North. The determinants of this phenomenon were found, for one part, through the analysis of the financial data of the Italian Municipalities - as presented by the SVIMEZ in its annual reports on the economy of the Mezzogiomo - and, for another part, through the critical synthesis of significant economic events which occurred during the period examined.
基金supported by grants of the Scientific Grant Agency of the Slovak Academy of Sciences:2/0098/20(JG)2/0145/21(NL)+3 种基金the Slovak Research and Development Agency:APVV19-0324(to NL)APVV-18-0163(MB)the Operational Programme Integrated Infrastructure for the project:Long-term strategic research of prevention, intervention and mechanisms of obesity and its comorbidities, IMTS:313011V344co-financed by the European Regional Development Fund”(JG)
文摘Oscillating field stimulation(OFS)with regular alterations in the polarity of electric current is a unique,experimental approach to stimulate,support,and potentially guide the outgrowth of both sensory and motor nerve fibers after spinal cord injury(SCI).In previous experiments,we demonstrated the beneficial effects of OFS in a 4-week survival period after SCI.In this study,we observed the major behavioral,morphological,and protein changes in rats after 15 minutes of T9 spinal compression with a 40 g force,followed by long-lasting OFS(50μA),over a 8-week survival period.Three groups of rats were analyzed:rats after T9 spinal compression(SCI group);SCI rats subjected to implantation of active oscillating field stimulator(OFS+SCI group);and SCI rats subjected to nonfunctional OFS(nOFS+SCI group).Histopathological analysis of spinal tissue indicated a strong impact of epidural OFS on the reduction of tissue and myelin loss after SCI in the segments adjacent to the lesion site.Quantitative fluorescent analysis of the most affected areas of spinal cord tissue revealed a higher number of spared axons and oligodendrocytes of rats in the OFS+SCI group,compared with rats in the SCI and nOFS+SCI groups.The protein levels of neurofilaments(NF-l),growth-associated protein-43(marker for newly sprouted axons),and myelin basic protein in rats were signifiantly increased in the OFS+SCI group than in the nOFS+SCI and SCI groups.This suggests a supporting role of the OFS in axonal and myelin regeneration after SCI.Moreover,rats in the OFS+SCI group showed great improvements in sensory and motor functions than did rats in the nOFS+SCI and SCI groups.All these findings suggest that long-lasting OFS applied immediately after SCI can provide a good microenviroment for recovery of damaged spinal tissue by triggering regenreative processes in the acute phase of injury.
文摘Concentrating Solar Power(CSP)plants offer a promising way to generate low-emission energy.However,these plants face challenges such as reduced sunlight during winter and cloudy days,despite being located in high solar radiation areas.Furthermore,their dispatch capacities and yields can be affected by high electricity consumption,particularly at night.The present work aims to develop an off-design model that evaluates the hourly and annual performances of a parabolic trough power plant(PTPP)equipped with a waste heat recovery system.The study aims to compare the performances of this new layout with those of the conventional Andasol 1 plant,with the aim of assessing the improvements achieved in the new design.Based on the results,it can be concluded that the new layout has increased the annual generated power to almost 183 GWh(an increase of about 7.60% is achieved compared to the Andasol 1 layout that generates 169 GWh annually).Additionally,the proposed installation has achieved an efficiency of 20.55%,which represents a 7.87% increase compared to the previous design(19.05%).The Levelized Cost of Electricity(LCOE)of the new layout has been reduced by more than 5.8% compared to the Andasol 1 plant.Specifically,it has decreased from 13.11 to 12.35 c/kWh.This reduction in LCOE highlights the improved cost-effectiveness of the newlayout,making it amore economically viable option for generating electricity compared to the conventional Andasol 1 plant.
