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从 “经济学总公式” 到 “经济循环恒等式”——一个国内大循环分析的新框架 被引量:2
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作者 章政 《求索》 CSSCI 北大核心 2021年第4期47-56,共10页
在重点梳理西方经济理论体系主要矛盾的基础上,打破经济学总公式(GDP)单一核算的思维模式,把国内生产总值拆分成四种消费循环,以价值恒等式(生产增加值=最终消费)原理为依据,从建立增加值和最终消费之间的动态过程分析入手,可以计算增... 在重点梳理西方经济理论体系主要矛盾的基础上,打破经济学总公式(GDP)单一核算的思维模式,把国内生产总值拆分成四种消费循环,以价值恒等式(生产增加值=最终消费)原理为依据,从建立增加值和最终消费之间的动态过程分析入手,可以计算增加值与四种消费循环之间的投入产出效果,提出价值贡献率和流量贡献率两个重要概念,并以此为基础归纳出分析我国经济大循环结构的初步理论框架。 展开更多
关键词 大循环动态分析 价值贡献率 流量贡献率 价值恒等式
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Effects of electroacupuncture pretreatment on motor function and cerebral blood flow in MCAO model rats
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作者 TAO Miaomiao DENG Yunyi +3 位作者 CHENG Aifang ZHANG Yingjie XU Mingshu YANG Yanping 《Journal of Acupuncture and Tuina Science》 CSCD 2022年第3期165-173,共9页
Objective:To observe the effects of electroacupuncture(EA)pretreatment on motor function,cerebral blood flow,cerebral infarction volume,and vascular endothelial growth factor(VEGF)level in middle cerebral artery occlu... Objective:To observe the effects of electroacupuncture(EA)pretreatment on motor function,cerebral blood flow,cerebral infarction volume,and vascular endothelial growth factor(VEGF)level in middle cerebral artery occlusion(MCAO)model rats.Methods:Twenty-four male Sprague-Dawley rats were randomly divided into a normal group,a model group,and an EA group,with eight rats in each group.The middle cerebral artery ischemia-reperfusion model was established by the suture-occluded method in the model group and the EA group,while not in the normal group.The EA group was pretreated with EA at bilateral Fengchi(GB20)before model preparation,once a day for 30 min each time for a total of 7 d.The changes in the CatWalk gait parameters,modified Bederson neurological deficit score,cerebral blood flow,cerebral infarction volume after ischemia,and VEGF level in the brain tissue of rats in each group were observed.Results:Compared with the normal group,the modified Bederson neurological deficit score in the model group and the EA group increased after modeling(P<0.05),and the CatWalk gait parameters(one-leg stance duration,gait cadence,and gait cycle)were all changed(P<0.05).Compared with the model group,the modified Bederson neurological deficit score in the EA group decreased(P<0.05),and the CatWalk gait parameters improved(P<0.05).Immediately after ischemia,the cerebral blood flow in the normal group was greater than that in the model group and the EA group(P<0.05);after reperfusion,the cerebral blood flow in the EA group was greater than that in the model group(P<0.05).Compared with the normal group,the cerebral infarction volume in the model group and the EA group increased(P<0.05).Compared with the model group,the cerebral infarction volume in the EA group decreased(P<0.05).The expression level of VEGF-positive cells in the rat brain tissue in the model group was higher than that in the normal group(P<0.05),and was higher in the EA group than in the model group(P<0.05).Conclusion:EA pretreatment improves the limb motor function in MCAO model rats,alleviates the symptoms of neurological deficits,promotes the recovery of cerebral blood flow,reduces the cerebral infarction area after MCAO modeling,and increases the VEGF expression in the brain tissue. 展开更多
关键词 Acupuncture Therapy ELECTROACUPUNCTURE Cerebral Infarction INFARCTION Middle Cerebral Artery Cerebrovascular Circulation Gait Analysis Vascular Endothelial Growth Factor Rats
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