A Study of Cross-border Renminbi Reflux in Qianhai District

随着中国经济的快速发展，人民币作为中国的法定货币在国际贸易结算中的使用程度越来越高，同时，2008年“次贷危机”后，美元从不断贬值到近来升值强劲，美元汇率波动剧烈，汇率大战的风险不断提升，凸显了美元作为单一的国际货币的风险，因此，人民币国际化既是中国的国际竞争需要，也是中国国力达到一定水平的必然结果。在人民币国际化进程中，香港作为我国的特别行政区，具有得天独厚的优势建立人民币离岸市场。目前，香港人民币离岸市场遇到的主要问题之一即为人民币的回流渠道问题，为此本文以深圳前海深港合作区的跨境人民币回流问题作为研究对象，探索合理的人民币回流机制。 本文在回顾其他学者关于货币跨境回流机制的研究的基础上...With the rapid development of economy, the total amount of imports and exports keeps rising for the last two decades.The extent of Renminbialso keeps rising in International trade settlement.Since the "subprime crisis" in 2008, the US Dollar’s value decreased a lot until just one year ago when it raised in a very fast way. The exchange rate of American dollar changed so fast that it caused great d...学位：工程管理硕士院系专业：管理学院_工商管理硕士(工商管理硕士)学号：X200815607

文昌鱼中一个2A肽介导的多基因表达载体构建

2A肽(P2A)介导的多基因表达载体具有高裂解活性且上、下游基因等摩尔表达等优点,已广泛应用于动物转基因研究.文昌鱼(amphioxus)作为一种新兴的模式动物,尚无应用这种表达载体的报道,为此在pXT7转录系统基础上构建一个P2A介导的多基因表达载体.将体外转录的P2A介导的mRNA注入文昌鱼卵细胞并受精后,经激光共聚焦显微镜和蛋白质免疫印迹(Western blot)检测表明,该mRNA在文昌鱼胚胎中能够高效地翻译和剪切,并且在信号肽的作用下eGFP蛋白定位于细胞核中,而mCherry蛋白定位于细胞膜上,上、下游蛋白间的剪切效率达到91%;进而构建了由文昌鱼热激蛋白基因启动子(BbHsp70)启动,并由P2A介导的多基因表达载体,实验证明其在热诱导和上、下游蛋白剪切方面均达到了预期效果.国家自然科学基金(31372188,31471986,31672246

Taxonomic and Molecular Phylogenetic Studies of Amphioxus: A Review and Prospective Evaluation

文昌鱼是最接近脊椎动物直接祖先的现生动物,在脊椎动物起源与演化研究中占有极其重要的位置。近年来,对文昌鱼的研究已引起越来越多的科学家的兴趣,然而作为生命科学研究的重要基础,这类动物的分类学研究相对滞后。依据已有的中国文昌鱼资源调查资料,中国沿海文昌鱼的分布应当十分广泛,即只要有适合文昌鱼栖息的沙滩,均有文昌鱼分布的可能。根据目前的分类学研究成果和动物命名法中的优先权原则,建议将产于青岛等地的文昌鱼种名Brnachiostoma belcheri tsingtauense订正为B.japonicus,南方的文昌鱼保留其原种名B.belcheri。由此,目前分布在中国沿海的鳃口文昌鱼属(Branchiostoma)至少有2种,侧殖文昌鱼属(Epigonichthys)有1～3种,漂浮文昌鱼(Amphioxides pelagicus)1种。DNA分子标记技术在文昌鱼分类学研究中将会发挥更大的作用。Amphioxus, as the closest living animal of the last common ancestor of all vertebrates, occupies an extremely important phylogenetic position in the evolution of vertebrates and has attracted the interest of scientists from various research fields in recent years. However, despite their importance for the life sciences, taxonomic studies of amphioxus are relatively limited. In present review, we summarize current progress in both field investigations and taxonomic research of Chinese amphioxus. Based on the investigation data, we assume that amphioxus is distributed in all habitable sandy beaches along the Chinese coast from south to north. According to the rule of priority and recent taxonomic studies on amphioxus, we also propose that the original subspecies Brnachiostoma belcheri tsingtauense together with the population in most Japanese waters is an independent species and its name should be revised to B. japonicus. Consequently, there are at least two species of genus Brnachiostoma and 1-3 of Epigonichthys and one of Amphioxides in the China Sea. Finally, the application of DNA molecular markers in systematic studies of cephalochordate is evaluated.国家自然科学基金资助项目(30470938;30570208);; 福建省自然科学基金资助项目(D0510002);; 厦门市科技计划项目(3502Z20042015

MEMS-based Micro Inertial Measurement Unit

【中文文摘】叙述了基于MEMS技术的微型惯性测量组合(MIMU)在国内外的发展状况及其应用,简要阐述了MIMU的基本原理和结构并对其优缺点进行了分析,同时也对其发展作了总结与展望。 【英文文摘】This paper describes the development and application of MIMU based on MEMS in and out of the country and investigates its fundamental principle and structure.The advantage and disadvantage of MIMU are analyzed,and at the same time the prospect of MIMU is also discussed

Design of self-test electrode for tunneling-based gyroscope with vibrating cantilever

在微机电系统内建立自检系统是提高系统运行可靠性、安全性的重要手段之一。陀螺仪中的Coriolis力和其他惯性力存在一定的差别,即使在恒定的角速度输入下,Coriolis力也是一种动态变化的力。通过一对平板电极,其中,一个平板电极的边缘按照一定的函数变化,当陀螺仪的悬臂梁振动时,其平板间的静电力的变化能很好地模拟陀螺仪中的Coriolis力,有限元分析结果也表明:应用该方法完全能实现陀螺的自检和测试。One of important way to improve the reliability and safety of MEMS is to use a built-in self-test.There are some differences between Coriolis force and other inertial force in gyroscope.The Coriolis force is dynamic,although the angular rate is constant.A pair of plate electrodes is used,the boundary of one of them changes according to a special function.When the gyroscope's cantilever oscillates,the electrostatic force between the two plate electrodes can perfectly simulate the Coriolis force in qyrosoope.The result of finite element analysis(FEA) also indicates this design can be used to realize the aim of self-testing in the gyroscope.国家自然科学基金资助项目(50275127);; 福建省自然科学基金资助项目(A0110003);; 福建省科技计划重点资助项目(2002H022

木麻黄基干林带后的风速变化规律和空间分布

以木麻黄基干林后沿风速为研究对象,从2006年11月到2007年3月在东山岛调查了不同发育阶段的木麻黄基干林后有效防护距离内的风速。结果表明:基干林带后风速总体上呈上升趋势,但在5h-10h有所下降,10h后风速一直上升,直到25h处接近于空旷地;空间分布呈平滑的上升曲面,局部有凸起和下凹区域,等值线分布疏密相间,局部区域弯曲不直。国家“十一五”科技支撑计划项目(2006BAD03A14-01);; 福建省重大科技专项(2006NZ0001-2

Seasonal and spatial variation of phytoplankton and relationship with water-quality factors in Futian Mangroves of Shenzhen

在探讨深圳福田红树林区浮游植物群落结构及种群数量变化规律的基础上,对红树林区不同水质环境中浮游植物时空变化进行了研究,初步分析主要水质因子与浮游植物密度时空变化的相关关系。分析表明,福田红树林区浮游植物有5门28属51种(含未知9种),以硅藻门种类为主,优势种为微小小环藻(Cyclotella caspia)和诺氏海链藻(Thalassiosira nordenskildi)等,蓝藻、绿藻能发展成为优势类群,优势种为小颤藻(Oscillatoria minima)和小球藻(Chlorella vulgaris)等。浮游植物种类组成季节变化明显,空间变化显著。浮游植物密度空间变化明显,季节差异不大。各季度的浮游植物密度较高,达到106cells·L-1的级别。由于接纳生活污水、工业废水、养殖废水等陆源污水,5个站位的主要水质因子受污水排放影响明显,站位受陆源污水影响的顺序依次为:Ⅳ>Ⅱ>Ⅴ>Ⅰ>Ⅲ,污水排放进入红树林区的水域水质显著区别于完全海水水域。陆源污水输入对浮游植物密度时空变化造成显著影响,浮游植物密度与总氮浓度、盐度相关性较好,与总氮成显著负相关,与盐度成显著正相关。Phytoplankton community were studied at 5 sites in Futian Mangrove Reserves of Shenzhen from Oct. 2005 to Sep. 2006. The species composition, densities and distribution of phytoplankton, in seasonal and spatial scale, were studied. Main water-quality factors were preliminary examined for their relations to phytoplankton densities. As result a total of 51 taxa (including 1 variety and 9 unidentified taxa) belonging to 28 genera in 5 phyta were identified. It showed that diatoms, such as Cyclotella caspia and Thalassiosira nordenski?ldi dominated in 4 seasons in most sites. Among the others, species of Cyanobacteria and Chlorophyta, such as Oscillatoria minima and Chlorella vulgaris, only dominated at a few sites. In contrast to a remarkable seasonal and spatial variation of species compositions, the phytoplankton densities changes little in season though they alternated with sites in spatial. Phytoplankton density was high reaching 106 cells?L-1 in 4 seasons. Water qualities changed with seasons in 5 sites due to the influence of domestic and industrial wastewater. The sites contaminated by the sewage are in sequence of Ⅳ >Ⅱ >Ⅴ >Ⅰ >Ⅲ, the pollution made water quality quite different with that of seawater in the open sea. Correlations of phytoplankton density with total nitrogen and salinity were found. It showed that the phytoplankton density changed positively with salinity but negatively with the total nitrogen.中国近海海洋综合调查与评价项目908-01-ST06和908-02-03-0

Mass Cultivation of Feed Organism for Amphioxus in Laboratory

运用实验生态学方法研究了海产动物重要饵料生物———叉鞭金藻(Dicrateriasp.)在室内大量培养的条件和方法。结果表明,营养盐浓度对叉鞭金藻的生长没有明显影响,以1倍浓度的F/2培养基最佳;水温21~27℃的范围都适合叉鞭金藻的培养,27℃下的生长速度和种群最终密度都高于其他温度;在实际应用中,接种密度以10×104~30×104个mL为最佳;在收获方式上,一次性培养与半连续培养的最终收获量没有显著差别,但半连续培养较一次性培养更有利于操作和减轻工作量。We have studied the condition and method for indoor mass cultivation of Dicrateria sp.,which is an important species for marine animal feeding.The results showed that concentration of nutrition salts did not obviously affect it's growth,and 1×F/2 medium would be the optimum.A range from 21 to 27 ℃was fit for the cultivation,but the growth rate and final population density at 27 ℃would be higher than those at other temperatures. Practically,an optimum inoculating density should be set between 10×10~4 and 30×10~4/mL Though hardly any difference has been shown between total harvest amounts of batch and semicontinuous cultivation,the latter is still better for simplifying manipulation and reducing workload.国家自然科学基金(30470938);; 福建省自然科学基金(D0510002);; 厦门市科技计划项

不同生长发育阶段木麻黄海岸林的防风效应

为探讨海岸木麻黄林分的风速变化规律和空间分布,从2006年11月到2007年3月在福建东山岛测定了不同发育阶段木麻黄林分内外多点的风速。应用等值线图法进行分析,结果表明:木麻黄林分各测点风速呈开口向上的抛物线,从空旷地到林分内10h之间风速呈下降趋势,在10h之后风速呈增长趋势;空间分布呈向上的V形曲面,其中有部分凸出和下凹区域;等值线分布疏密相间,有部分闭合区域。国家“十一五”科技支撑计划项目(2006BAD03A14-01);; 福建省重大科技专项(2006NZ0001-2

闽南沿海木麻黄基干林带的防风效应

为深入认识沿海木麻黄基干林带内外风速变化规律和空间分布,从2006年11月到2007年3月在东山岛木麻黄基干林带内外多个测点进行了风速测定。结果表明:基干林带风速变化规律为:林内下降和林外上升的开口向上的抛物线状;风速空间分布为林带内下凹、林带后上升的平滑曲面,中间出现一些小的凸出或下凹的斑快。基干林带内等值线比较平直均匀,林带后比较弯曲且分布不均匀。国家“十一五”科技支撑计划项目(2006BAD03A14-01);; 福建省重大科技专项(2006NZ0001-2