an empirical study on factors affecting the adoption of online shopping

随着中国互联网的蓬勃发展，网络逐渐成为一种新的购物渠道。但对什么因素驱使消费者采用网络购物渠道，网络购物者具有哪些行为特征等，国内还缺乏相关的研究。因此，对影响消费者网络购物行为的关键因素进行研究具有重要的理论意义和实践指导意义。本文以技术接受模型为基础，引入感知风险、人口统计因素、购物导向和网络经验4类变量，建立消费者网络购物的理论模型，并以结构方程建模(SEM，StructuralEquationModeling)验证模型假设，识别出影响消费者网络购物的关键因素。分析结果显示：感知网络购物容易使用、感知网络购物有用、收入、体验型购物导向和网络经验是影响消费者网络购物行为的关键因素，而感知风...The interaction of consumers and marketers within the Web environment, particularly online retailing is a growing area of importance with the flourishing development of the internet in China. But researches on which factors drive consumers to shop online and are still limited in China. So，it is particularly meaningful to investigate the factors influencing online shopping behavior from both theore...学位：管理学硕士院系专业：管理学院企业管理系_企业管理(含财务管理、市场营销、人力资源管理)学号：20031402

Empirical Study of Factors which Cause High M2/GDP in China

M2/GDP通常用来衡量一个国家的经济货币化水平。近年来,我国的M2/GDP畸高并逐年上升,M2/GDP水平不仅大于发达国家,还远远高于类似的发展中国家。文章在综合前人的研究结果的基础上,通过建立多元线性回归模型对我国M2/GDP过高的影响因素进行实证的分析。实证分析表明,我国M2/GDP畸高的原因是:金融市场不完善,总储蓄率高居不下,广义货币流通速度急剧下降以及国家债务负担沉重。在此基础上,文章将提出遏制M2/GDP风险的建议与措施,并对实证研究的贡献与不足之处进行总结。M_2/GDP is commonly used to analyze the level of an country's monetarization level.Recently,the M_2/GDP of China has reached an unusually high point,which is not only higher than developed counties,but also higher than developing countries in the similar seedtime.The article would try to build a multiple linear regression model to analyze the factors which cause the high M_2/GDP in China.The empirical study reveals the factors that cause the unusually high M_2/GDP are: undeveloped financial market,high deposit ratio,low velocity of money circulation and heavy national debt.On the basis of above analysis,the article would propose practical countermeasure and suggestions to keep M_2/GDP in limits,and finally summarize the innovations and limitations of the empirical study

An Empirical Study on Influencing Factors of High M2/GDP in China

通过建立多元线性回归模型对我国M2/GDP过高的影响因素进行实证分析,结果表明,金融市场不完善、总储蓄率高居不下、广义货币流通速度急剧下降以及国家债务负担沉重是我国M2/GDP畸高的主要原因。应从加快金融市场的改革与监管、鼓励金融创新、发展资本市场、维持适度的债务规模以及鼓励公众使用其他投资方式等方面遏制M2/GDP过高所带来的风险。Through establishing multi linear regression model,this thesis makes empirical analysis on the influencing factors of high M2/GDP in China.Empirical evidences reveal that the main causes of unusual high M2/GDP in China are: undeveloped financial market,high deposit ratio,low velocity of circulation of broad money and heavy national debt.To limit the risk of too high M2/GDP,effects should be made in several aspects: speed up reform and supervision of financial market,encourage financial innovation,develop capital market,keep moderate debt level,and encourage publics to use other ways of investment etc

基于切向超滤技术的胶体有机碳和无机氮分离及物源初探

利用切向超滤技术对九龙江口天然水体中胶体相(1 kDa～0. 45μm)、真溶解相(<1 kDa)和\"溶解相\"(<0. 45μm)的溶解有机碳和无机氮进行了分离与提取,初步探讨了水环境因子对其理化特性的影响机制,进而探讨了它们的来源和转化.结果表明,切向超滤过程的膜空白和质量平衡符合技术要求;溶解有机碳、亚硝酸盐氮、氨氮、硝酸盐氮和无机氮存在形式以真溶液相(<1 kDa)为主,其在胶体相中的质量浓度分别为0. 207～0. 810 mg/dm3、0. 001～1. 870μg/dm3、ND～2. 08μg/dm3、0. 62～79. 30μg/dm3和1. 07～81. 10μg/dm3;胶体态溶解有机碳(COC)含量主要受陆源输入控制.国家海洋局海洋公益性行业科研专项资助项目(201505034-4);;福建省科学技术厅公益专项资助项目(2015R1003-12

Impact of substrate salinity on caloric value,energy accumulation and its distribution in various organs of Bruguiera gymnorrhiza seedlings.

研究了人工培养条件下基质盐度对红树植物木榄 (Bruguieragymnorrhiza)幼苗的热值、干物质及能量积累的影响 .结果表明 ,木榄幼苗干物质和能量的积累存在低盐促进和高盐抑制的现象 ,其最大值出现于盐度10mg·g-1处 ;随基质盐度的提高 ,木榄幼苗的干物质和能量积累倾向于叶片及细根等光合作用场所和养分吸收器官 ,木榄幼苗各器官干重热值及去灰分热值有不同的变化规律 ,其中叶片热值的变化规律能较好地反映木榄幼苗抗盐性的变化情况 .本文从能量学角度探讨了红树植物的抗盐生理生态The study with artificial culture showed that the accumulation of dry matter and energy in Bruguiera gymnorrhiza seedlings was promoted by low substrate salinity,but inhibited by high substrate salinity,which peaked at 10mg·g -1 substrate salinity.With the increase of substrate salinity, the dry matter and the energy tended to be allocated to the micro roots and leaves, which are nutrient absorbing organ and photosynthetic organ, respectively.With the increase of substrate salinity, the changes in caloric values were differed in various organs of B. gymnorrhiza seedlings,and those in leaves could reflect the changes in the salt resistance of the seedlings.国家自然科学基金资助项目!(39670 1 35

Effect of Exogenous Nitric Oxide Donor Sodium Nitroprusside on Stomatal Movement in Leaves of Mangrove Plant Aegiceras corniculatum

探索一种用材简单、操作方便、真实性强的观察红树植物桐花树叶片气孔的制片技术,并利用该技术研究不同浓度、不同处理时间的一氧化氮(nO)供体硝普钠(SOdIuM nITrOPruSSIdE,SnP)对桐花树气孔开闭的影响,探讨了nO调控的气孔运动与外源CA2+的关系以及nO与H2O2在调节气孔运动过程中的关系。结果表明:在搅碎法、指甲油印迹法、牛皮胶印迹法三种观察气孔方法中,牛皮胶印迹法是观察气孔开度变化的最佳方法。nO能够诱导桐花树气孔快速关闭,且表现出明显的时间效应与浓度效应。nO导致的气孔关闭与CA2+的参与有密切关系,nO与H2O2存在明显的协同效应,可以促进气孔关闭。The aim of the present paper was to find out a simple and easy-to-go method to observe the stomatal movement of a mangrove plant Aegiceras corniculatum.The new method was used to study the following areas, inculing the effect of exogenous nitric oxide (NO) on the leaf stomatal movement under different concentrations and different treated time, the effect of Ca2+ in the regulation of stomatal movement induced by exogenous NO, the interactional effect between NO and H2O2 in the regulationb of stomatal movement.The results suggested that the oxhide pastern print was the best way to observe stomatal movement of A.corniculatum compared with the blender method and the nail enamel print method.The stomatal closure induced by NO was associated with Ca2+ in dose dependent manner.It was also proved that a rapid stomatal closure could be co-induced by NO and H2O2 in A.corniculatum guard cells.国家自然科学基金项目(30770192;30670317);厦门大学“新世纪优秀人才支持计划”项目(X07115);湖北民族学院博士启动基金项

哌啶阳离子功能化侧链型阴离子交换膜的制备

燃料电池因其能量转化率高、污染小等特点,成为当前的研究热点.然而,作为关键部件的阴离子交换膜仍然存在离子电导率低、耐碱性能差等缺点,这限制了燃料电池的发展.利用威廉姆森成醚反应在聚醚酮主链接枝哌啶鎓盐,成功制备了侧链型阴离子交换膜.设计的哌啶鎓盐通过长柔性亚甲基与主链相连,使膜内形成有利于高效离子传输的微相分离结构,PEKCQA-1.0膜在80℃的电导率高达72.7mS/cm.此外,哌啶阳离子基团离主链较远,减弱了对主链的吸电子作用;同时,环型结构的哌啶阳离子具有一定的空间位阻,减少了OH~-对阳离子基团的攻击,使膜表现出优异的耐碱性能.PEK-CQA-0.8膜在60℃下1mol/L KOH水溶液中浸泡360h后,离子电导率仅下降了8.8%,有望应用于碱性燃料电池.国家自然科学基金面上项目(21376194,21576226

EFFECT OF ELECTRON DONOR AND ACCEPTOR ON CAPACITIES OF AMMONIA-RESITANT FROM AZOTBACTER VINELANDII

电子供体连二亚硫酸钠、甲基紫精及电子受体亚甲蓝均能强烈抑制棕色固氮菌表达固氮活性 ,并引起该菌的抗氨阻遏能力减弱。适当提高氧压 ,能提高菌体的固氮活性近1 5 % ,但过高的氧分压反而抑制菌体的固氮活性。此外 ,提高氢分压能降低棕色固氮菌菌体内的还原电位 ,从而达到提高菌体抗氨阻遏能力的效果。Electronic donors dithionite as well as m et hyl viologen and it receptor methylene blue strongly inhibited activity of nitro gen fixation that Azotobacter vinelandii expressed,which ca used capacity of ammonia-resistant weaken greatly.About 15% of total activity f rom the whole cell were risen by increasing suitable oxygen atmosphere.Opposite, t he activity was inhibited by increasing over concentration of O 2 further.The r eduction potential in the inside environment from Azotobacter vinelan dii whole cell shifted to negative by increasing hydrogen pressure,whi ch resulted in its capacity of ammonia-resistant rose.福建省自然科学基金资助项目 (No . 960 0 6

Effect of rich organic matter on Paraprionospio pinnata (Polychaeta:Spionidae) on Futian tidal flat in Shenzhen Bay

根据1999年1月至2002年10月在深圳湾福田潮滩A、D、E三个断面获得的大型底栖动物奇异稚齿虫(Paraprionospiopinnata)和有机质数据,分析了深圳湾福田潮滩奇异稚齿虫对有机质含量的效应特征。结果表明,深圳湾福田潮滩奇异稚齿虫有明显的季节变化,即3、4月密度高,形成全年的高峰期,9、10月密度低,形成全年低谷期。奇异稚齿虫密度随着有机质含量的增加逐渐降低,前者密度和生物量大小是:A>D>E,而有机质大小也是:AD>E.The distribution of organic matter content is also A<D<E.There is negative correlation between density of P.pinnata and organic matter content.The higher organic matter is,the lower density and biomass of P.pinnata are

纤维蛋白原在Pt电极上的界面电化学研究

应用电化学方法和电化学原位红外反射光谱(electrochemical in-situ FTIR)等研究了纤维蛋白原在Pt电极上的界面电化学行为.结果表明:纤维蛋白原在Pt电极上的吸附使电极的析氢与氧脱附过程减弱,影响程度随扫速的增加而增强;同样纤维蛋白原的吸附会降低亚铁氰化钾-铁氰化钾电对的氧化还原反应可逆性和电流;在-0.1~0.6V(vs.SCE)扫描范围内没有出现纤维蛋白原的特征"氧化还原"峰.电化学原位红外反射光谱测试表明纤维蛋白原在0.3~0.5V(vs.SCE)间发生化学反应,有新的产物生成