[Objective] The purpose of this study is to determine the effects of com-bined use of boron and manganese fertilizers on the nutritional quality and physio-logical indices of Brassica campestris. [Method] In the nutri...[Objective] The purpose of this study is to determine the effects of com-bined use of boron and manganese fertilizers on the nutritional quality and physio-logical indices of Brassica campestris. [Method] In the nutrient solutions for growing B. campestris by hydroponics, boric acid and manganese sulfate were added at 0.5, 2.5, and 7.5 mg/L respectively. Another treatment without boron and manganese was prepared as the control. Quality and physiological indices of B. campestris in the 10 treatments were measured. [Result] Boron and manganese shared obvious in-teraction in improving the quality and physiological indices of B. campestris. To cul-tivate B. campestris with high quality and strong resistance, the optimum concentra-tions of boron and manganese in the nutrient solution should be 2.5 mg/L boric acid and 2.5-7.5 mg/L manganese sulfate. [Conclusion] The findings wil provide refer-ence for studying effects of trace elements on nutrient composition of vegetables.展开更多
目的了解我国中老年高血糖、血脂异常、高血压人群健康体检服务利用现状并分析其影响因素,为优化“三高共管”策略和卫生服务体系改革提供依据。方法依托中国健康与养老追踪调查(China health and retirement longitudinal study,CHARLS...目的了解我国中老年高血糖、血脂异常、高血压人群健康体检服务利用现状并分析其影响因素,为优化“三高共管”策略和卫生服务体系改革提供依据。方法依托中国健康与养老追踪调查(China health and retirement longitudinal study,CHARLS)于2020年开展的第五轮调查数据,共筛选中老年高血糖、血脂异常、高血压患者8227人作为研究对象,基于安德森模型框架,采用χ2检验和多因素Logistic回归分析影响我国中老年高血糖、血脂异常、高血压人群健康体检服务利用的主要因素。结果研究对象体检服务利用率为54.13%。多因素Logistic回归分析结果显示年龄(≥65岁:OR=2.024,95%CI=1.831~2.236,P<0.001)、受教育程度(高中及以上:OR=1.303,95%CI=1.123~1.511,P<0.001)、个人收入(有:OR=1.440,95%CI=1.285~1.614,P<0.001)、养老保险类别(企业职工养老保险:OR=0.655,95%CI=0.516~0.833,P<0.001;城镇居民/城乡居民养老保险:OR=0.633,95%CI=0.493~0.813,P<0.001;新型农村居民社会养老保险:OR=0.602,95%CI=0.466~0.778,P<0.001;其他养老保险:OR=0.549,95%CI=0.390~0.772,P<0.001;无养老保险:OR=0.473,95%CI=0.361~0.619,P<0.001)、医保类别(新农合、其他医保、无医保:OR=0.834,95%CI=0.726~0.959,P=0.011)、抑郁症状(是:OR=0.885,95%CI=0.804~0.975,P=0.014)、慢性病患病数量(2种:OR=1.158,95%CI=1.004~1.337,P=0.045;3种:OR=1.273,95%CI=1.099~1.475,P=0.001;≥4种:OR=1.282,95%CI=1.117~1.472,P<0.001)、社交情况(有:OR=1.396,95%CI=1.274~1.530,P<0.001)、住院服务利用(利用/需求:OR=1.207,95%CI:1.080~1.348,P<0.001)、饮酒(是:OR=1.127,95%CI=1.019~1.246,P=0.020)及吸烟(是:OR=0.761,95%CI=0.681~0.849,P<0.001)是影响我国中老年高血糖、血脂异常、高血压人群健康体检服务利用的主要因素。结论我国中老年高血糖、血脂异常、高血压人群体检服务利用率有待提高,建议将45~64岁人群纳入弹性体检补贴范围,推动体检费用医保报销,减轻贫困人群经费负担;深化医防融合机制,创新技术赋能,简化体检流程;加强慢性病防控政策及健康宣教,提升居民健康素养水平和健康管理依从性;针对低收入、低教育水平、有抑郁症状等人群,制定定向干预方案,实现慢性病防控关口前移,促进健康老龄化。展开更多
With the intensification of the energy crisis and the worsening greenhouse effect,the development of sustainable integrated energy systems(IES)has become a crucial direction for energy transition.In this context,this ...With the intensification of the energy crisis and the worsening greenhouse effect,the development of sustainable integrated energy systems(IES)has become a crucial direction for energy transition.In this context,this paper proposes a low-carbon economic dispatch strategy under the green hydrogen certificate trading(GHCT)and the ladder-type carbon emission trading(CET)mechanism,enabling the coordinated utilization of green and blue hydrogen.Specifically,a proton exchange membrane electrolyzer(PEME)model that accounts for dynamic efficiency characteristics,and a steam methane reforming(SMR)model incorporating waste heat recovery,are developed.Based on these models,a hydrogen production–storage–utilization framework is established to enable the coordinated deployment of green and blue hydrogen.Furthermore,the gas turbine(GT)unit are retrofitted using oxygenenriched combustion carbon capture(OCC)technology,wherein the oxygen produced by PEME is employed to create an oxygen-enriched combustion environment.This approach reduces energy waste and facilitates low-carbon power generation.In addition,the GHCT mechanism is integrated into the system alongside the ladder-type CET mechanism,and their complementary effects are investigated.A comprehensive optimization model is then formulated to simultaneously achieve carbon reduction and economic efficiency across the system.Case study results show that the proposed strategy reduces wind curtailment by 7.77%,carbon emissions by 65.98%,and total cost by 12.57%.This study offers theoretical reference for the low-carbon,economic,and efficient operation of future energy systems.展开更多
基金Supported by a grant from Ministry of Science and Technology for the Project of Science and Technology Talents Serving in Enterprise(2009GJC50042)~~
文摘[Objective] The purpose of this study is to determine the effects of com-bined use of boron and manganese fertilizers on the nutritional quality and physio-logical indices of Brassica campestris. [Method] In the nutrient solutions for growing B. campestris by hydroponics, boric acid and manganese sulfate were added at 0.5, 2.5, and 7.5 mg/L respectively. Another treatment without boron and manganese was prepared as the control. Quality and physiological indices of B. campestris in the 10 treatments were measured. [Result] Boron and manganese shared obvious in-teraction in improving the quality and physiological indices of B. campestris. To cul-tivate B. campestris with high quality and strong resistance, the optimum concentra-tions of boron and manganese in the nutrient solution should be 2.5 mg/L boric acid and 2.5-7.5 mg/L manganese sulfate. [Conclusion] The findings wil provide refer-ence for studying effects of trace elements on nutrient composition of vegetables.
文摘目的了解我国中老年高血糖、血脂异常、高血压人群健康体检服务利用现状并分析其影响因素,为优化“三高共管”策略和卫生服务体系改革提供依据。方法依托中国健康与养老追踪调查(China health and retirement longitudinal study,CHARLS)于2020年开展的第五轮调查数据,共筛选中老年高血糖、血脂异常、高血压患者8227人作为研究对象,基于安德森模型框架,采用χ2检验和多因素Logistic回归分析影响我国中老年高血糖、血脂异常、高血压人群健康体检服务利用的主要因素。结果研究对象体检服务利用率为54.13%。多因素Logistic回归分析结果显示年龄(≥65岁:OR=2.024,95%CI=1.831~2.236,P<0.001)、受教育程度(高中及以上:OR=1.303,95%CI=1.123~1.511,P<0.001)、个人收入(有:OR=1.440,95%CI=1.285~1.614,P<0.001)、养老保险类别(企业职工养老保险:OR=0.655,95%CI=0.516~0.833,P<0.001;城镇居民/城乡居民养老保险:OR=0.633,95%CI=0.493~0.813,P<0.001;新型农村居民社会养老保险:OR=0.602,95%CI=0.466~0.778,P<0.001;其他养老保险:OR=0.549,95%CI=0.390~0.772,P<0.001;无养老保险:OR=0.473,95%CI=0.361~0.619,P<0.001)、医保类别(新农合、其他医保、无医保:OR=0.834,95%CI=0.726~0.959,P=0.011)、抑郁症状(是:OR=0.885,95%CI=0.804~0.975,P=0.014)、慢性病患病数量(2种:OR=1.158,95%CI=1.004~1.337,P=0.045;3种:OR=1.273,95%CI=1.099~1.475,P=0.001;≥4种:OR=1.282,95%CI=1.117~1.472,P<0.001)、社交情况(有:OR=1.396,95%CI=1.274~1.530,P<0.001)、住院服务利用(利用/需求:OR=1.207,95%CI:1.080~1.348,P<0.001)、饮酒(是:OR=1.127,95%CI=1.019~1.246,P=0.020)及吸烟(是:OR=0.761,95%CI=0.681~0.849,P<0.001)是影响我国中老年高血糖、血脂异常、高血压人群健康体检服务利用的主要因素。结论我国中老年高血糖、血脂异常、高血压人群体检服务利用率有待提高,建议将45~64岁人群纳入弹性体检补贴范围,推动体检费用医保报销,减轻贫困人群经费负担;深化医防融合机制,创新技术赋能,简化体检流程;加强慢性病防控政策及健康宣教,提升居民健康素养水平和健康管理依从性;针对低收入、低教育水平、有抑郁症状等人群,制定定向干预方案,实现慢性病防控关口前移,促进健康老龄化。
基金supported by National Natural Science Foundation of China(52477101)Natural Science Foundation of Jiangsu Province(BK20210932).
文摘With the intensification of the energy crisis and the worsening greenhouse effect,the development of sustainable integrated energy systems(IES)has become a crucial direction for energy transition.In this context,this paper proposes a low-carbon economic dispatch strategy under the green hydrogen certificate trading(GHCT)and the ladder-type carbon emission trading(CET)mechanism,enabling the coordinated utilization of green and blue hydrogen.Specifically,a proton exchange membrane electrolyzer(PEME)model that accounts for dynamic efficiency characteristics,and a steam methane reforming(SMR)model incorporating waste heat recovery,are developed.Based on these models,a hydrogen production–storage–utilization framework is established to enable the coordinated deployment of green and blue hydrogen.Furthermore,the gas turbine(GT)unit are retrofitted using oxygenenriched combustion carbon capture(OCC)technology,wherein the oxygen produced by PEME is employed to create an oxygen-enriched combustion environment.This approach reduces energy waste and facilitates low-carbon power generation.In addition,the GHCT mechanism is integrated into the system alongside the ladder-type CET mechanism,and their complementary effects are investigated.A comprehensive optimization model is then formulated to simultaneously achieve carbon reduction and economic efficiency across the system.Case study results show that the proposed strategy reduces wind curtailment by 7.77%,carbon emissions by 65.98%,and total cost by 12.57%.This study offers theoretical reference for the low-carbon,economic,and efficient operation of future energy systems.
