An Empirical Analysis of the Contribution of Fiscal Expenditure to the Economic Growth

由于受国际金融危机的影响,各国政府都在不同程度上扩大了其支出水平,推动经济的发展与复苏。文章首先建立政府支出对经济增长贡献率关系的理论模型,然后基于我国的相关数据,运用联立方程组模型,进行实证分析。实证结果表明,政府支出对经济增长不仅有直接的拉动作用,而且还会通过消费、投资的促进作用间接地拉动经济增长,同时还对政府支出对经济增长的贡献率进行了估计。Due to the international financial crisis,each governments try to expand its expenditure level to promote economic development and recovery.In this paper,the author builds up a theortical model of the contribution of fiscal expenditure to the economic growth,and model conclusions are tested by using simultaneous-equation model based on the data of our country.And then the research reveals that fiscal expenditure not only has a direct role in stimulating the economic growth,but also has an indirect role in promoting economic growth through the consumption and investment,meanwhile,the contribution rate of the fiscal expenditure to economic growth has been estimated

利用表面增强拉曼光谱快速鉴别卷烟生产中烟用香精香料

烟用香精香料的配方是卷烟工业中的核心技术,也是构建不同特色卷烟产品的关键之一。然而,现有的香精香料质量评价手段主要是人工嗅香和测定某些特定的物性指标,如折光指数、相对密度、酸值、挥发份总量等。在实验室科研中还有使用色谱-质谱联用等方法。但是上述手段仍存在较多问题,比如受主观意识影响,操作繁琐,前处理耗时长,费用高,灵敏度低等。基于此,本文开发了一种利用表面增强拉曼光谱技术结合主成分分析算法来快速鉴别实际生产中不同种类、不同掺兑样的烟用香精香料的方法。本文利用该方法成功获取不同种类、同一种类不同生产批次及烟用香精香料不同掺兑量样品的增强拉曼谱图。经主成分分析表明不同种类以及不同掺兑量样品的散点分布在不同区域,直接区分度高;同一种类不同生产批次的香精香料谱图类似,在散点图中较为集中;说明不同生产批次的样品以及不同掺兑量的样品都可以与其他种类的香精香料标准样品进行有效区分。本文利用表面增强拉曼光谱结合主成分分析算法对烟用香精香料进行检测的方法操作简易,检测快捷,成本低廉,结果便于分析识别,适用于烟用香精香料实际生产中的质量控制。国家自然科学基金(No.21522508)浙江中烟工业有限责任公司科技项目(No.ZJZY2016C002

基于CUMS模型探究抑郁症对细菌感染的影响及作用

目的抑郁症是一种常见的精神疾病，对患者的身体健康有着深远的影响。抑郁症与较高的细菌感染风险相关；然而，这是否是一种因果关系，以及抑郁症如何影响感染仍不清楚。因此，本研究旨在通过构建慢性不可预测轻度应激（CUMS）模型，探究抑郁表型在小鼠细菌感染中的作用。方法小鼠经CUMS诱导4周，通过行为学测试评估抑郁表型。随后，小鼠腹腔注射肺炎克雷伯菌模拟细菌感染，感染后48 h收集血清和腹腔组织。苏木精-伊红染色（ HE）观察组织病理学改变，酶联免疫吸附试验（ELISA）检测炎性因子水平。此外，对感染前收集的小鼠粪便样本进行肠道菌群16S rDNA基因测序分析，并检测未感染小鼠结肠组织中NF-κB/NLRP3信号通路的表达水平。结果行为学测试结果显示，与对照组相比，CUMS小鼠体质量显著降低（P<0.000 1， t=5.426），蔗糖偏好率显著降低（P<0.001， t=4.937），游泳静止时间显著增加（P<0.001， t=16.37），旷场中央区域停留时间显著减少（P<0.01， t=3.575）。生存分析显示，与对照组小鼠相比，感染后CUMS小鼠的生存率显著降低（P<0.05）。HE染色结果显示，CUMS小鼠肝脏（P<0.05， t=4.025）、肾脏（P<0.05， t=2.828）、肠系膜（P<0.01， t=5.367）组织损伤程度明显加重。ELISA结果显示，炎症因子IL-6（P<0.01， t=3.365）、IL-1β（P<0.01， t=4.061）、TNF-α（P<0.01， t=4.460）和LPS（P<0.000 1， t=27.24）水平升高。16S rDNA测序结果显示，CUMS小鼠肠道菌群结构发生改变，与对照组小鼠明显不同，表现出菌群失调。与对照组相比，CUMS小鼠结肠组织中NF-κB（P<0.01， t=6.825）和NLRP3（P<0.001， t=9.561）的表达水平升高。结论CUMS小鼠发生更严重的细菌感染。CUMS诱导的抑郁表型可能因为破坏肠道菌群组成和激活NF-κB/NLRP3信号通路，增加了小鼠对细菌感染的易感性

Influence of symmetric benzene-polycarboxylate acids on the structures of silver-aminopyrimidyl derivative system

通讯作者地址: Huang, RB (通讯作者), Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 地址: 1. Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, Xiamen 361005, Peoples R China 2. Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China 电子邮件地址: [email protected] novel coordination polymers, [Ag(BTC)(1/3)(ADMP)](n) (1), [Ag(BDC)(1/2)(ADMP)](n) (2) (2-amino-4,6-dimethylpyrimidine = ADMP; H3BTC = 1,3,5-benzenetricarboxylic acid; H2BDC = 1,4-benzenedicarboxylic acid), have been synthesized under the ammoniacal conditions and structurally characterized. In complex 1, H3BTC ligand showing a new coordination mode links silver atoms to generate a two-dimensional (2-D) honeycomb-like structure, which is further linked through ADMP ligands to produce a complicated three-dimensional (3-D) framework. Complex 2 features a 2-D infinite layer framework consisting of binuclear silver clusters, which is further stacked via intermolecular C-methyl-H center dot center dot center dot pi it short contacts and Van der Waals interactions to form a 3-D supramolecular architecture. (C) 2009 Elsevier B.V. All rights reserved.National Natural Science Foundation of China 20721001 MSTC 2007CB81530

A Journey into the City. Migrant Workers' Relation with the Urban Space and Struggle for Existence in Xu Zechen's Early Jingpiao Fiction

In contemporary China, rural-urban migrants constitute a new urban subject with entirely new identity-related issues. This study aims at demonstrating how literature can be a valid field in investigating such evolving subjectivities, through an analysis of Xu Zechen’s early novellas depicting migrants’ vicissitudes in Beijing. Combining a close reading of the texts and a review of the main social problems characterising rural-urban migration in China, this paper focuses on the representation of the identity crisis within the migrant self in Xu’s stories, taking into account the network of meanings employed by the writer to signify the objective and subjective tension between the city and the countryside