Renewable generation is rapidly increasing and transforming power systems toward“new-type power systems”.The integration of renewable energy resources necessitates a shift from conventional grid-following converters...Renewable generation is rapidly increasing and transforming power systems toward“new-type power systems”.The integration of renewable energy resources necessitates a shift from conventional grid-following converters(GFLs)to advanced grid-forming controls.Although grid-forming converters(GFMs)provide grid support and enhance system stability under weak grid conditions,their deployment requires more robust hardware,complex control algorithms and system operation constraints,resulting in planning and operational trade-offs between system stability and cost efficiency.This paper studies the underexplored question of how many GFMs are needed from a techno-economic perspective.The holistic analysis integrates long-term planning,short-term operational strategies and dynamic stability considerations,thereby supporting large-scale renewable integration while ensuring system security and economic benefits.展开更多
Objective:To investigate the efficacy of drug retention enema combined with deep hyperthermia in the treatment of radiation proctitis in patients with cervical cancer.Methods:A randomized controlled study was conducte...Objective:To investigate the efficacy of drug retention enema combined with deep hyperthermia in the treatment of radiation proctitis in patients with cervical cancer.Methods:A randomized controlled study was conducted,selecting 60 patients with radiation proctitis after cervical cancer,who were randomly divided into a control group and an experimental group of 30 cases each using the random number table method.Both groups of patients received conventional treatment.On this basis,the control group received drug retention enema.The experimental group was treated with deep hyperthermia in addition to the control group.Both groups were treated continuously for 1 month.Compare the clinical symptoms,quality of life,inflammatory markers,and effective treatment rate of the two groups after treatment.Results:Compared with the control group,the improvement in clinical symptoms after treatment in the experimental group was significantly better than that in the former(P<0.05);The quality of life score was significantly higher than that of the control group(P<0.05),and the inflammatory markers were significantly lower than those of the control group(P<0.05);the effective treatment rate was significantly higher than that of the control group(P<0.05).Conclusion:Drug retention enema combined with deep hyperthermia has a good therapeutic effect on radiation proctitis in cervical cancer patients undergoing radiotherapy,which can alleviate patient symptoms,improve quality of life,inhibit inflammatory response,and increase the effective treatment rate.展开更多
The Indonesian Throughflow(ITF), which connects the tropical Pacific and Indian oceans, plays important roles in the inter-ocean water exchange and regional or even global climate variability. The Makassar Strait is t...The Indonesian Throughflow(ITF), which connects the tropical Pacific and Indian oceans, plays important roles in the inter-ocean water exchange and regional or even global climate variability. The Makassar Strait is the main inflow passage of the ITF, carrying about 77% of the total ITF volume transport. In this study, we analyze the simulated ITF in the Makassar Strait in the Simple Ocean Data Assimilation version 3(SODA3) datasets. A total of nine ensemble members of the SODA3 datasets, of which are driven by different surface forcings and bulk formulas, and with or without data assimilation, are used in this study. The annual mean water transports(i.e.,volume, heat and freshwater) are related to the combination of surface forcing and bulk formula, as well as whether data assimilation is employed. The phases of the seasonal and interannual variability in water transports cross the Makassar Strait, are basically consistent with each other among the SODA3 ensemble members. The interannual variability in Makassar Strait volume and heat transports are significantly correlated with El Ni?oSouthern Oscillation(ENSO) at time lags of-6 to 7 months. There is no statistically significant correlation between the freshwater transport and the ENSO. The Makassar Strait water transports are not significantly correlated with the Indian Ocean Dipole(IOD), which may attribute to model deficiency in simulating the propagation of semiannual Kelvin waves from the Indian Ocean to the Makassar Strait.展开更多
Based on in-situ observations in the East China Sea(ECS)during October 2021,we investigated a cross-shelf penetrating front(PF)in the inner shelf and explored its potential biogeochemical-ecological effects from a mul...Based on in-situ observations in the East China Sea(ECS)during October 2021,we investigated a cross-shelf penetrating front(PF)in the inner shelf and explored its potential biogeochemical-ecological effects from a multidisciplinary perspective.The results show that a pronounced tongue-shaped PF was present at the southeast of the Hangzhou Bay,with salinity of 29−32 and a seaward horizontal penetration scale of~200 km.It mainly occurred in the upper layers,and a spatial separation existed between this PF and the bottom salinity front in the northern coastal region off Zhejiang.In contrast,the salinity fronts at surface and bottom were well matched in the southern coastal area.Compared to the surface-to-bottom consistent coastal front in the southern region off Zhejiang,a stronger thermocline and halocline were sustained in the northern PF-dominated region,and suitable conditions could be achieved for phytoplankton growth and accumulation.The in-situ observed high-chlorophyll a(Chl a)zone in a seaward tongue shape was further an important indicator or signal for PF occurrence,and it was responsible for the decoupling of nutrient distributions and PF.The southern coastal front off Zhejiang might largely restrict the seaward transport of nutrients,and the dynamic environment under weak stratification in this region was disadvantageous for the growth of phytoplankton;thus the Chl a content was maintained at a relatively low level near the southern coastal region.Our results demonstrate that the PF combined with the coastal front may play an important role in shaping/regulating hydrodynamics,nutrient distributions and the Chl a regime over the inner ECS shelf.展开更多
基金supported in part by the Carbon Neutrality and Energy System Transformation project and in part by EPSRC under Grant EP/Y025946/1.
文摘Renewable generation is rapidly increasing and transforming power systems toward“new-type power systems”.The integration of renewable energy resources necessitates a shift from conventional grid-following converters(GFLs)to advanced grid-forming controls.Although grid-forming converters(GFMs)provide grid support and enhance system stability under weak grid conditions,their deployment requires more robust hardware,complex control algorithms and system operation constraints,resulting in planning and operational trade-offs between system stability and cost efficiency.This paper studies the underexplored question of how many GFMs are needed from a techno-economic perspective.The holistic analysis integrates long-term planning,short-term operational strategies and dynamic stability considerations,thereby supporting large-scale renewable integration while ensuring system security and economic benefits.
基金Exploration of Radiotherapy Combined with Hyperthermia and Other Modalities to Reduce Radiation Enteritis in Gynecological Cancer Patients(Project No.2341ZF137).
文摘Objective:To investigate the efficacy of drug retention enema combined with deep hyperthermia in the treatment of radiation proctitis in patients with cervical cancer.Methods:A randomized controlled study was conducted,selecting 60 patients with radiation proctitis after cervical cancer,who were randomly divided into a control group and an experimental group of 30 cases each using the random number table method.Both groups of patients received conventional treatment.On this basis,the control group received drug retention enema.The experimental group was treated with deep hyperthermia in addition to the control group.Both groups were treated continuously for 1 month.Compare the clinical symptoms,quality of life,inflammatory markers,and effective treatment rate of the two groups after treatment.Results:Compared with the control group,the improvement in clinical symptoms after treatment in the experimental group was significantly better than that in the former(P<0.05);The quality of life score was significantly higher than that of the control group(P<0.05),and the inflammatory markers were significantly lower than those of the control group(P<0.05);the effective treatment rate was significantly higher than that of the control group(P<0.05).Conclusion:Drug retention enema combined with deep hyperthermia has a good therapeutic effect on radiation proctitis in cervical cancer patients undergoing radiotherapy,which can alleviate patient symptoms,improve quality of life,inhibit inflammatory response,and increase the effective treatment rate.
基金The Fund of Laoshan Laboratory under contract No. LSKJ202202700the National Natural Science Foundation of China under contract Nos 42076023, 42076024 and 41876027the Global Change and Air-Sea Interaction Ⅱ Project under contract No.GASI-01-AIP-STwin。
文摘The Indonesian Throughflow(ITF), which connects the tropical Pacific and Indian oceans, plays important roles in the inter-ocean water exchange and regional or even global climate variability. The Makassar Strait is the main inflow passage of the ITF, carrying about 77% of the total ITF volume transport. In this study, we analyze the simulated ITF in the Makassar Strait in the Simple Ocean Data Assimilation version 3(SODA3) datasets. A total of nine ensemble members of the SODA3 datasets, of which are driven by different surface forcings and bulk formulas, and with or without data assimilation, are used in this study. The annual mean water transports(i.e.,volume, heat and freshwater) are related to the combination of surface forcing and bulk formula, as well as whether data assimilation is employed. The phases of the seasonal and interannual variability in water transports cross the Makassar Strait, are basically consistent with each other among the SODA3 ensemble members. The interannual variability in Makassar Strait volume and heat transports are significantly correlated with El Ni?oSouthern Oscillation(ENSO) at time lags of-6 to 7 months. There is no statistically significant correlation between the freshwater transport and the ENSO. The Makassar Strait water transports are not significantly correlated with the Indian Ocean Dipole(IOD), which may attribute to model deficiency in simulating the propagation of semiannual Kelvin waves from the Indian Ocean to the Makassar Strait.
基金The National Natural Science Foundation of China under contract Nos U23A2033 and 41876085the Basic Scientific Fund of the National Public Research Institutes of China under contract No.2020S03.
文摘Based on in-situ observations in the East China Sea(ECS)during October 2021,we investigated a cross-shelf penetrating front(PF)in the inner shelf and explored its potential biogeochemical-ecological effects from a multidisciplinary perspective.The results show that a pronounced tongue-shaped PF was present at the southeast of the Hangzhou Bay,with salinity of 29−32 and a seaward horizontal penetration scale of~200 km.It mainly occurred in the upper layers,and a spatial separation existed between this PF and the bottom salinity front in the northern coastal region off Zhejiang.In contrast,the salinity fronts at surface and bottom were well matched in the southern coastal area.Compared to the surface-to-bottom consistent coastal front in the southern region off Zhejiang,a stronger thermocline and halocline were sustained in the northern PF-dominated region,and suitable conditions could be achieved for phytoplankton growth and accumulation.The in-situ observed high-chlorophyll a(Chl a)zone in a seaward tongue shape was further an important indicator or signal for PF occurrence,and it was responsible for the decoupling of nutrient distributions and PF.The southern coastal front off Zhejiang might largely restrict the seaward transport of nutrients,and the dynamic environment under weak stratification in this region was disadvantageous for the growth of phytoplankton;thus the Chl a content was maintained at a relatively low level near the southern coastal region.Our results demonstrate that the PF combined with the coastal front may play an important role in shaping/regulating hydrodynamics,nutrient distributions and the Chl a regime over the inner ECS shelf.
基金supported by the National Natural Science Foundation of China (Nos.52274295,52104291,51874079)the Natural Science Foundation of Hebei Province,China (Nos.E2022501028,E2022501029,E2021501029,A2021501007,E2018501091,E2020501001,E2022501030)+4 种基金the Hebei Province Key Research and Development Plan Project,China (No.19211302D)Performance Subsidy Fund for Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province,China (No.22567627H)the Fundamental Research Funds for the Central Universities,China (Nos.N2223009,N2223010,N2123035,N2023040)the Science and Technology Project of Hebei Education Department,China (No.ZD2022158)the Central Guided Local Science and Technology Development Fund Project of Hebei Province,China (No.226Z4401G).
