Studies on the Active Oxygen Species for the Oxidative Coupling of Methane over La2O3 and Nd2O3 Catalysts Promoted by SrF2

在甲烷氧化偶联反应中，关于催化剂表面参与活化甲烷的活性氧物种及其本质至今仍存有争议。本论文以20mol%SrF2/La2O3和50mol%SrF2/Nd2O3催化剂为研究对象，采用O2-TPD、脉冲实验、原位Raman、原位IR和EPR等表征技术对催化剂表面的甲烷氧化偶联反应的活性氧物种进行深入的研究，并采用18O2同位素交换实验进行确证。20mol%SrF2/La2O3催化剂的脉冲实验结果表明，晶格氧不直接参与甲烷氧化偶联反应，气相氧的存在是催化剂获得高活性的基本要素。间隔脉冲氧与甲烷的实验进一步证实了晶格氧不直接参与甲烷氧化偶联反应。原位IR光谱表征结果表明，20mol%SrF2/La2O...The nature of active oxygen species participated in the oxidative coupling of methane was still controversial. The purpose of this thesis was that the active oxygen species for the oxidative coupling of methane over 20%SrF2/La2O3 and 50% SrF2/Nd2O3 catalysts were studied, using by O2-TPD, pulse reaction, in situ Raman, in situ IR and EPR. And the 18O2 isotopic exchange experiment was also performe...学位：理学博士院系专业：化学化工学院化学系_物理化学(含化学物理)学号：B20022502

国际税法视角下常设机构利润归属方法探析

在国际税收中,跨国企业的跨国营业所得面临着双重征税,对此,居住国和来源国达成了常设机构原则,但各国常设机构利润归属方法的不统一产生了双重征税和不征税问题。为此,OECd于2006年发布《常设机构利润归属报告》,统一采用OECd授权方法来归属常设机构的利润。我国应借鉴该《报告》,规定一个类似OECd授权方法的利润归属方法,加强对内部交易的利润归属管理,明确规定针对常设机构的特别纳税调整

Operator Incentives by Monetary Rewards in State-Owned Listed Companies——Theoretical Analysis and Empirical Study Based on Ultimate Owner and Managerial power

本文基于契约理论和委托代理理论，结合最终控制人性质与管理当局权力理论，对我国国有上市公司经营者的货币薪酬激励进行了研究。薪酬激励被视为解决委托代理问题的主要途径之一，但是由于我国国有上市公司代理链条的独特性——经济代理关系与行政代理关系并存，造成国有上市公司经营者薪酬激励具有不同于其他所有权性质上市公司薪酬激励的独特之处。近年来对于管理当局权力的研究发现，管理当局权力在薪酬决定和执行中可能会成为代理问题的一部分。因此，本文尝试对我国国有上市公司经营者的货币薪酬激励的决定因素进行研究，探寻最终控制人性质与管理当局权力对此所产生的影响，以期为我国国有上市公司激励机制的发展与完善提供相关的实证研究证...Based on the contracting theory, the agency theory and combined with ultimate owner and managerial power theory, this dissertation researches on monetary rewards incentive in state-owned listed companies. Compensation incentive is considered as one of ways to solve principal-agent problem, but the peculiarity of agent chain of state-owned companies in our country----there are both economic agent r...学位：管理学博士院系专业：管理学院会计系_会计学学号：1752006015311

国际司法机构的扩散与国际贸易争端解决方式的协调

随着国际争端解决机构的迅速增加,经济贸易争端的当事方可在享有并行管辖权的司法机构间进行选择,这鼓励了挑选法院和挑选规则现象。一方面,国际公法领域争端解决机构的扩散是一个积极的法律发展方向,反映了政府在跨国关系上强化国际法规则的意愿。另一方面,任由“挑选法院“与“挑选规则“行为发展泛滥有损国际经济法体系的稳定性、确定性和公信力。因此,如何对“挑选法院“和“挑选规则“行为进行规制、确定最优的争端解决方式已成为国际经济法面临的一项重大课题

Synthesis and Characterization of (+)-α-Phenylethanammonium Phosphotungstate and Its Catalytic Performance for Asymmetric Epoxidation

以Keggin型12-磷钨酸和(+)-α-苯乙胺为原料,通过水热法合成了具有Keggin结构的(+)-α-苯乙胺磷钨酸盐(C8H12-N)3PW12O40.通过红外光谱、核磁共振波谱、紫外光谱、元素分析和热重分析等技术对合成产物进行了结构、组成和热稳定性的表征和考察,证实了合成产物为(+)-α-苯乙胺磷钨酸盐.以顺丙烯磷酸-α-苯乙胺盐环氧化合成(1R,2S)-环氧丙基磷酸-α-苯乙胺盐为探针反应,考察了(C8H12N)3PW12O40催化不对称环氧化性能.结果表明,在催化剂用量为2.00%和反应温度为50℃时,产物环氧丙基磷酸苯乙胺盐的收率为64%,(1R,2S)-环氧丙基磷酸苯乙胺盐的对映选择性ee值为10.8%.A(+)-α-phenylethanammonium phosphotungstate(C8H12N)3PW12O40 was synthesized by a mild hydrothermal technique and its structure was characterized by infrared spectroscopy,nuclear magnetic resonance,ultraviolet spectroscopy,elemental analysis,and thermogravimetry.A probe reaction of the epoxidation of(±)-α-phenylethanammonium-cis-1-propenylphosphonate into α-phenylethanammonium-cis-1,2-epoxypropyl phosphonate was carried out to investigate the catalytic performance of(C8H12N)3P-W12O40.A yield of 64% of epoxide and ee of 10.8% of α-phenylethanammonium-cis-(1R,2S)-epoxypropyl phosphonate were obtained with 2% catalyst at temperature 50 ℃.河南省杰出人才创新基金(0221001200

Statistical Data Items,Dissemination Channels and User Perceiving Quality

通过实施统计用户满意度调查,测量统计用户对于政府统计部门所生产各类统计数据项目的综合质量感知,及其在主要发布渠道的具体质量感知状况。基于调查数据的分析结果表明:各类统计数据项目的综合用户质量感知水平存在较为明显的差异,用户质量感知与其使用频率之间保持了一定的正相关关系;而各类统计项目在不同发布渠道的具体质量表现也不尽相同。据此可以有效确立统计数据质量管理工作的重点环节。The paper aims at measuring user perception both for compositive statistical data quality,and concrete elements performance in several data dissemination channels.The analysis outcome,for the data obtained from a user satisfaction survey,indicates that user perceiving quality for kinds of statistical data items have considerable differences,and there's a positive correlation between user perception and their use frequency.In addition,the differences of concrete quality level in several data dissemination channels appear for kinds of statistical data items.Based on relevant discoveries,the emphases of statistical data quality management can be established effectually

台湾航空业发展及两岸航空业合作前景分析

航空运输是五大现代运输方式之一,航空运输业对于经济和社会发展起到关键的基础支撑作用。台湾地区作为外向型小型岛屿经济体,航空运输在其经济发展和对外联系中发挥了重要的客流和物流承载功能。近十几年来,受岛内需求萎缩和其它运输行业竞争的影响,台湾航空业面临日益严峻的营运压力,亟需寻找新的出路,而两岸“三通“的基本实现为其提供了空前的发展机遇。本文通过考察台湾民用航空运输业的发展现况,分析其市场竞争格局,探讨两岸航空业合作的发展前景

Research Category and Primary Paradigm of Macro-level Statistical Data Quality Assessment

不断推进宏观统计数据质量评估研究的体系化和规范化,是该领域学术价值存续和揭示有效信息的必由出路。本文旨在解决其中的两方面关键问题:一是界定宏观统计数据质量评估的研究范畴,藉此明晰数据质量评估研究的概念结构、方法原理、理论基础和功能边界;二是探讨检验各种宏观统计数据质量评估方法的适用性的可行方法,以确保评估研究可以给出较为可靠的结论,进而明确宏观统计数据质量评估研究的基本范式,探讨研究中应遵循的一系列操作规则。It is the systematism and normalization of macro-level statistical data quality assessment research that ensure science value and information impression in the research realm.The paper aims at solving two problems:one is ascertaining the research category of macro-level statistical data quality assessment,depending on which the concept structure,method principle,theory basis and function limit of existing researches can be revealed,and the other is probing into feasible test methods for applicability of the data quality assessment methods,in order to ensure credibility of conclusion of the assessment researches.Furthermore,a primary research paradigm of data quality assessment has been declared,and a series of operation rules discussed

开放式基金“赎回困惑”:基于行为金融学的成因分析

行为金融学以投资者的有限理性作为前提假设,在解释金融市场的异常现象上比传统金融学更有说服力。与国外基金业相比,我国开放式基金存在“赎回困惑”现象:即随着基金业绩增长,赎回率不降反升;相反有些业绩比较差甚至亏损的基金的净赎回率却相对较低。文章从行为金融学的角度出发,分析我国开放式基金的“赎回困惑”现象及其成因

Preparation and Performance of Nanosized La_2O_3

采用热分解法、溶胶-凝胶法和沉淀法制备了纳米氧化镧,并对其进行Xrd、bET、TEM、CO2-TPd和O2-TPd表征.结果表明,由不同制备方法获得的纳米氧化镧都为六方晶相结构,但由沉淀法制得的纳米氧化镧的颗粒最小(30~50nM),由溶胶-凝胶法制得的纳米氧化镧的比表面积最大(20.8M2.g-1),因而这两种方法获得的纳米氧化镧具有较好的吸附氧能力.La2O3 were prepared by decomposition,sol-gel and precipitation methods,respectively,and the properties of the La2O3 were determined by XRD,BET,TEM,CO2-TPD and O2-TPD.The results showed that all of the samples were hexagonal La2O3,smaller size(30--50 nm) and larger specific surface area(20.8 m2·g-1) were obtained by precipitation and sol-gel methods,respectively,which would be favorable to absorb O2.国家自然科学基金资助项目(20433030;20423002);福建省教育厅资助项目(JA09050