Modulating Synthesis, structures and properties of gold-silver clusters

金属纳米团簇由于其特殊的尺寸，因此被视作是原子和块状金属之间的桥梁。与金属纳米颗粒相比，金属纳米团簇在催化、分子放光、电子学和生物学等方面都具有很好的性质和应用。近年来通过合成方法的不断探究和改进，科学家们成功合成了一系列金属纳米团簇，并且通过X-射线单晶衍射仪对其单晶结构进行了精确的表征。 本论文主要通过尝试引入不同的有机配体和无机配体，通过调控合成的比例以及方法，合成了一系列金银混合纳米团簇，并探索总结一些控制合成金属纳米团簇尤其是高核的金属纳米团簇的规律和方法。具体内容如下： 一、 硝酸根对高核金银纳米团簇的控制合成 基于我们课题组先前纯金的纳米团簇的直接还原合成，通过引入硝酸根以...Metal nanoclusters are considered as a bridge between small molecules and bulk metal. Compared with metal nanoparticles, metal nanoclusters have potential applications in catalysis, molecular sensing, electronics and biology. Through continuous exploration and improvement of synthetic methods, scientists have synthesized many metal nanoclusters, and determined their crystal structures by single cr...学位：理学硕士院系专业：化学化工学院_物理化学学号：2052014115158

[[alternative]]A Finite Time Horizon Inventory Model with Deterioration and Time-Value of Money under the Conditions of Permissible Delay in Payments

計畫編號：NSC90-2218-E032-010研究期間：200108~200207研究經費：366,000[[sponsorship]]行政院國家科學委員

[[alternative]]An Inventory Model for Deteriorating Items with Stock-Dependent Demand and Time-Value of Money when Credit Period is Provided

計畫編號：NSC91-2213-E032-026研究期間：200208~200307研究經費：278,000[[sponsorship]]行政院國家科學委員

应收账款保理的经济学

保理公司是专门负责应收账款管理的金融机构。如果保理商选择购买一个企业的应收账款，它将按应收账款发票面值的一定折扣预先支付给企业一定的资金。[ 一些情况下，企业可以将应收账款质押给保理商而得到预付款]近来有些文献试图检验企业保理决策背后的动机：Mian & Mian 提供了一个综合的实证检验，给出了多方面的解释（强调了垄断性附属机构的形成）。但由于缺乏观测数据，他们的检验只为企业保理决策变量提供了微弱的证据。Sopranzetti (1997b)提出应收账款出售会减弱投资不足问题；Smith 和Schnucker (1994)从产业组织的角度，对保理提出了新的理解，他们更关注产业的垂直集成和交易成本，研究发现：当卖方对客户的专业投资分散、卖方监控成本高时，企业会倾向于将应收账款保理，从而优化他们的信用管理。如果Smith 和Schnucker (1994)是正确的，保理是用来改善信用风险管理，那么，为什么企业只能将最高质量的应收账款保理？[ 除了前面提到的文献，Papadimitriou et al（1994）对保理的历史、保理行业、保理同商业贷款的区别进行了综合的论述。他们也阐述了环境以及基于社区的保理商如何有助于减少不发达社区的信贷配给。考虑到更广义的资产出售，Hite el al（1987）声称企业选择出售固定资产的主要原因是为了提高运营效率。John和Ofek（1994）发现，尽管出售资产的企业在经营效率方面得到了改进，但这种改进(如果有的话)大多数来源于对此关注的增加。Lang et al（1994）得出了相反的证明，他们认为企业出售资产并不是单独由于经营效率的改进，而是由于资产出售可以获得最低廉的融资来源。其他的文献，例如Shliefer 和Brown et al （1994）认为企业在财务危机时出售资产是为了获得流动资金。]译者单位：山东大学经济研究中心（250100

Preparation and characteration of composite microspheres with multi-sensitive properties

本文结合Fe3O4、N-异丙基丙烯酰胺(NIPAm)和壳聚糖的特性，制备了具有磁敏、温敏和pH敏感性能的多敏性复合微球，并进一步考察了牛血清蛋白(BSA)在复合微球中的吸附效果。 (1)用共沉淀法制备了Fe3O4磁性纳米粒子，并对其用油酸进行表面改性，继而采用沉淀聚合法制备了壳聚糖磁性微球。考察沉淀剂浓度、乳化剂种类、Fe3O4的改性等条件对制备微球的影响。研究结果表明，在适宜条件下，可以制得平均粒径为150nm、单分散性好且磁性明显的壳聚糖磁性微球。 (2)在壳聚糖磁性微球的基础上通过乳液聚合法制备了多重敏感的的Fe3O4-壳聚糖-NIPAm复合微球。通过考察制备过程中多个因素对合成微球...Multi-sensitive composite microspheres were fabricated via emulsion polymerizationof Fe3O4, chitosan and N-isopropylacrylamide (NIPAm), then the adsorption of Bovine Serum Albumin (BSA) was studied. (1) The Fe3O4 nanoparticles were prepared by co-precipitation method and modified by oleic acid. Chitosan magnetic microspheres were then prepared by precipitation polymerization method. The results d...学位：工学硕士院系专业：化学化工学院化学工程与生物工程系_工业催化学号：1922005130177

Geographical Location and the CEO Compensation: Empirical Evidence from Chinese Listed Companies

笔者以我国五大国家级中心城市和六大国家区域中心城市作为地理位置的替代变量,研究了地理位置与公司高管薪酬之间的关系。地理位置对高管薪酬的影响主要通过两个途径:一个途径是企业总部、中介机构、各类人才在中心城市的集聚,促进了高管人力资本的积累,从而提高了位于中心城市的企业的高管薪酬;另一个途径是在公司高管薪酬制定的过程中,会以周围企业的高管薪酬作为参照点,这使得高管薪酬受到本地区其他企业的影响。研究发现,在控制人均GDP、CPI指数等变量的情况下,注册地为中心城市的上市公司,其CEO薪酬要高于其他地区的CEO薪酬,且距离中心城市越近的上市公司,CEO薪酬越高;一个地区上一年的平均高管薪酬,以及该地区领导企业的高管薪酬,均对其他上市公司的高管薪酬有显著影响。本文的发现在一定程度上证实了在中国,地理位置是公司高管薪酬的一个重要影响因素。本文的研究结论,对上市公司制定合理的高管薪酬有重要的参考意义。Using five national level central cities and six regional level central cities as the proxy for geo- graphical central city, we explore the relationship of geographical location and the CEO compensation. Geo- graphical location has impact on the CEO compensation through two ways. The first is the spatial clustering of firms, agencies and talents in big central cities which results in high CEO compensation. The other is that near- by firms＇ CEO compensation would act as the reference point to that of this firm, which makes CEO compensa- tion influenced by other companies in the region. This paper finds that the compensation of CEOs whose compa- nies locate in the central cities is statistically significantly higher than that of CEOs whose companies are not when controlling the common variables such as per GDP, CPI index etc. The study also find the shorter of the distance between the headquarter and the central city, the higher the CEO compensation. Further research shows that both the average CEO compensation in a specific province last year and last year＇s top three highest CEO compensation of state owned enterprises in a specific province have strong influences on the next year＇s CEO compensation. In sum, this research systematically proves that geographic location is an important factor deter- mines CEO compensation in China. This study provides a reference proof to the CEO compensation policy of lis- ted company.国家自然科学基金重点项目“公司财务政策选择与动态演化研究”(项目编号:71232005)；国家自然科学基金面上项目“社会制度、法律制度和公司治理”(项目编号:71172053)；国家自然科学基金青年项目“媒体监督、报道偏差与公司财务行为调整”(项目编号:71202062)；福建省软科学重点项目“创造性破坏视角下企业科技创新与福建经济增长的关系研究”(项目编号:2013R0092)；厦门大学校长基金“共识与分歧:舆论监督、轰动报道对公司治理作用的影响研究”(项目编号:20720140015)

The Functions of Distance Learning

[[abstract]]Basically, there are two types of college students on university campuses: one is the traditional students who graduated from high schools and then entered to a college directly; the other one is the untraditional students who entered into job markets first after graduating from a high school and then decided to go back to universities to receive further education. Some of these untraditional students might quit their jobs when they decide to go back to schools. Some of them, however, still hold a full-time position at work when they become students again. The number of untraditional students is continuously growing in university campuses (Schuetze and Slowey, 2002). Ely (1997) proposed that maintaining a balanced life from work, family and school is not an easy task for these untraditional college students. To help these students alleviate their time management problems among work, family and school, some innovative instructional pedagogies are developed. One of the pedagogies is to deliver courses through synchronized or unsynchronized internet courses. Under such a teaching environment, students would watch pre-recorded course contents on the internet. All of the other class activities, such as participation, examinations, class discussion, homework assignment, etc., are also conducted on the internet, i.e., without face to face interactions between the instructor and students. Although it is hard to monitor and control students’ learning process, Webster and Hackley (1997) found no differences in teaching effectiveness between courses conducted in classrooms and in technology-mediated distance learning environment. Nevertheless, Akhras (2012) suggested that the objective of learning should not be limited to obtaining knowledge only. An ideal learning process should be able to help learners understand who they are and enhance their motivation to learn. To this respect, frequent face to face interactions with instructors and with other classmates would be an important component in a learning process. Since limited or no face to face interaction is presented in internet teaching environments, delivering courses throuhg the internet probably would not induce self-learning or arouse students’ motivation to learn. As a result, internet teaching might not achieve what most people think it would achieve, i.e., a substitute for face to face classroom teachings.[[sponsorship]]Pixel Associazione Culturale[[conferencetype]]國際[[conferencedate]]20130613~20130614[[booktype]]電子版[[iscallforpapers]]Y[[conferencelocation]]Florence, Ital

媒体报道偏差的经济学分析

与社会对媒体客观、中立报道的预期不同,在现实世界中,媒体报道往往是有偏的。通过影响受众的信息结构和信念分布,媒体报道偏差能够影响社会微观经济主体的决策与行为,进而在宏观层面上影响社会资源的配置效率和社会福利水平。本文从媒体报道偏差的动因、媒体报道偏差程度的计量、媒体报道偏差的经济后果以及如何缓解媒体报道偏差四个纬度,系统归纳、梳理和评价了有关媒体报道偏差领域的最新文献,并在此基础上指出国内关于媒体报道偏差领域未来需要研究及可能进一步拓展的方向。国家自然科学基金项目(71202062;71172053); 教育部博士点基金项目(20120121120008); 福建省社会科学规划项目(2012C026

中国式“压力型”财政激励的财源增长效应——基于取消农业税改革的实证研究

在经济社会转型期，地方政府面临着“压力型体制”下复杂多样的压力来源，积极汲取财政收入成为地方政府应对压力的主要途经，从而形成典型的中国式“压力型”财政激励。文章以取消农业税改革作为地方政府财政压力变化的准自然实验，利用强度双重差分法实证检验财政压力变化的财源增长效应。文章研究发现，在同一地区内，取消农业税改革后财政压力更大的县，其第二产业尤其是工业产值实现了更快增长。但这一结果并未出现在同一地区中农业税占比更大的县，说明地方政府的财源建设行为更多来自财政压力的激励而非税收结构变化的激励。这种财政压力的工业增长效应更多发生于．Y-业基础薄弱和财政自给率高的地区，且放松环境规制成为地方政府实现工业增长效应的重要手段。作者感谢国家自然科学基金面上项目（71573218、71673229）、福建省自然科学基金计划资助项目（2017J01134）、中央高校基本科研业务费专项资金（20720161013）的资