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中国县域尺度碳收支的时空演变研究 被引量:9
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作者 戴林琳 封昌炜 +1 位作者 周子杰 金丹 《生态经济》 北大核心 2023年第11期31-39,59,共10页
县域作为经济社会发展的基本单元,对于科学评估我国碳源与碳汇状况以及指导碳中和策略落实具有重要意义。以2680个县域单元为样本统计并核算2000—2017年碳源和碳汇数据,综合运用标准差椭圆、重心分析、空间自相关分析、碳平衡模型等来... 县域作为经济社会发展的基本单元,对于科学评估我国碳源与碳汇状况以及指导碳中和策略落实具有重要意义。以2680个县域单元为样本统计并核算2000—2017年碳源和碳汇数据,综合运用标准差椭圆、重心分析、空间自相关分析、碳平衡模型等来测度与解析县域碳收支的时空演变特征。研究发现:(1)2017年全国碳源增长为2000年的3倍,碳汇仅增加约1%。(2)碳源和碳汇占比均与地区面积有关,西部地区最高、东北地区最低;碳源重心由东向西转移,碳汇重心由东南向西北转移,即西南部碳源的影响在逐渐增加,西部碳汇的作用在增强;碳汇与碳源均呈现空间聚集分布特征。(3)东北地区、西部地区、中部地区和东部地区碳失衡状况日益严重,其中东北地区和西部地区的碳平衡情况相对较好。 展开更多
关键词 县域 碳汇 碳源 碳收支 时空演变
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Efficacy and advantages of modified Traditional Chinese Medicine treatments based on"kidney reinforcing"for chronic aplastic ane-mia:a randomized controlled clinical trial 被引量:12
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作者 Wu Dijiong Shen Yiping +13 位作者 Ye Baodong Fang Bingmu Lin Shengyun Chen Zhilu Jiang Huifang feng changwei He Lüyuan Gao Yanting Liu Yonglin Liu Yonghua Zhu Jiajia Wu Liqiang Shao Keding Zhou Yuhong 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2016年第4期434-443,共10页
OBJECTIVE:To compare the efficacy of modified treatments based on "kidney reinforcing" in the management of chronic aplastic anemia(CAA),and explore their advantages and specialties.METHODS:One hundred and e... OBJECTIVE:To compare the efficacy of modified treatments based on "kidney reinforcing" in the management of chronic aplastic anemia(CAA),and explore their advantages and specialties.METHODS:One hundred and eleven patients with CAA were randomly divided into three groups:kidney reinforcing alone(KA),"kidney reinforcing and Qi tonifying"(KQ),and "kidney reinforcing and blood circulation invigorating"(KC).Normal and positive control groups were also formed.All patients were treated for 6 months(two courses).Hemograms,Traditional Chinese Medicine(TCM) syndrome scores,and therapeutic effects were assessed,and changes in T-lymphocyte subsets,regulatory T cells and cytokines were detected.RESULTS:The KQ and KC groups had lower TCM syndrome scores than the positive control group after 6 months(P < 0.05).The KQ group had a higher overall efficacy than the positive control group after 3 months(P < 0.05),while platelet counts increased in the KC group after 6 months(P < 0.05).CD3+ T-lymphocyte ratios decreased only in the KQ group,while CD3 + CD4 + CD8-Tlymphocytes increased only in the KC group after 6 months(P <0.05).Levels of interferon-γ,tumor necrosis fac-tor-α,interleukin(IL)-2 and IL-6 decreased and levels of IL-4 and IL-10 increased in all treated groups after 6 months.Levels of IL-6 in the KQ and KC groups were lower than those in the positive control group(P < 0.05).CONCLUSION:Treatments based on kidney reinforcing have a rebalancing effect on cytotoxic and T helper cells,and regulate expression of interferon-γ,IL-2,IL-6 and IL-4.KQ may be more effective in treating CAA,and KC may have an advantage in platelet recovery. 展开更多
关键词 Anemia aplastic Reinforcing Qi strengthening kidney Reinforcing kidney nourish ing blood Randomized controlled trial
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电厂继电保护常见故障及现场处理对策 被引量:1
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作者 冯昌伟 《大众用电》 2021年第7期60-61,共2页
电厂继电保护可以保障电力系统运行的安全性和稳定性。近年来,人们生产生活的各个行业都需要利用电能资源,并且对电能资源的需求量在不断增加,对供电系统运行质量提出了更高的要求,因此不仅要提高电能输送的质量,也要确保系统运行的安... 电厂继电保护可以保障电力系统运行的安全性和稳定性。近年来,人们生产生活的各个行业都需要利用电能资源,并且对电能资源的需求量在不断增加,对供电系统运行质量提出了更高的要求,因此不仅要提高电能输送的质量,也要确保系统运行的安全性。继电保护是电厂运行中的重要环节之一,其故障发生率相对较高,会影响电力系统运行的安全性,严重时甚至会造成安全事故。因此,有必要研究继电保护的常见故障及处理措施。基于此,文章主要分析了电厂继电保护系统的常见故障,并提出了相应的处理对策,以供相关人员参考。 展开更多
关键词 继电保护 电能资源 电力系统运行 供电系统 故障发生率 电能输送 处理对策 常见故障
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