A Study on the Transmitting Mechanism of Financial Risks between Chinese A-share Market and Other Major Asian Stock Markets

随着经济全球化和亚洲一体化进程的深入，中国与亚洲各个国家和地区的合作取得重大突破，中国在亚洲金融市场的话语权不断提高，承担的责任也越来越大，面临来自亚洲的系统性风险越来越不容忽视。深入研究中国A股与亚洲其他主要股市金融风险的传导机制，对中国的经济发展与金融安全以及跨境资产配置都具有非常重要的理论与现实意义。 为了揭示中国A股与亚洲其他主要股市的风险传导机制，本文从风险传导的“外在”和“内在”两个视角进行研究。在“风险传导的外在表现”方面，本文从整体和局部两个层面进行分析。整体层面上，本文采用线性和非线性Granger因果关系检验分析了中国A股与亚洲整体股市的均值溢出效应和波动溢出效应；局部层...In recent years, China has made a breakthrough in the cooperation with Asian neighbors. As China has greater influence on the Asian financial markets, China faces more systemic financial risks from Asia. A careful study on the transmitting mechanism of financial risks between Chinese A-share market and other major Asian stock markets is of great theoretical and practical significance to China's ec...学位：经济学硕士院系专业：经济学院_国民经济学学号：1542013115201

The evaluation of disaster loss in coastal zone under different sea level rise scene simulation: A Case Study of the Yangtze River Delta Region

在全球气候变化背景下导致的海平面上升、极端气候事件等现象的日趋严重，引发了多种海洋和海岸带灾害加剧，使得我国沿海城市成为各类海洋灾害的频发区，各类海洋灾害导致的经济损失也呈现递增趋势。如何准确评估海平面上升导致的海岸带地区灾害损失，是海岸带地区制定防灾减灾和可持续发展战略的基础。本研究以长三角地区为研究区域，采用双嵌套网格风暴潮-天文潮耦合数值预报模型（NestedCoupledTide-surgePredictionModel，简称NCTSM模型）、地理信息系统（GeographicInformationSystem，简称GIS）、夜间遥感技术和数理统计分析方法相结合，进行我国海岸带在不同海...Sea level rise and extreme weather events, which are caused by global climate change, has been aggravating coastal disasters, such as storm surge, coast erosion, salt water intrusion, land submergence, flooding, and pollution. And making China’s coastal cities face an increasing trend of marine disaster loss. Therefore, by precisely analyzing the coastal disaster loss induced by sea level rise, wo...学位：理学硕士院系专业：环境与生态学院_环境管理学号：2262011115142

Study of Manganese-Based Phosphate Cathode Materials for Sodium Ion Batteries

现代社会日益增长的能源需求及化石燃料的逐渐枯竭，使锂离子电池作为一种高效的能量存储转化装置，得到了迅速的发展。近年来，钠离子电池也逐渐成为了新一代能量存储装置的研究热点，与前者相比，钠离子电池具有钠源储量丰富、价格低廉，因而在制造和使用的过程中具有价格优势。因此，钠离子电池的出现有望加快可充电二次电池在大规模能量存储领域的应用。与锂相比，钠的工作电压高出0.3V，因此钠离子电池的工作电压及能量密度通常要低于相应的锂离子电池。发展高比容量钠离子电池电极材料将是钠离子电池研究领域的重要课题。在众多钠离子电池正极材料中，聚阴离子型正极材料因具有高工作电压、良好的循环稳定性及热稳定性等特点而被广泛研究...Concerned about the possible exhaustion of fossil fuels and the ever-growing demands of energy, lithium ion batteries (LIBs) is playing an important role as a highly-efficient energy-storage device in our society either nowadays or in future . In parallel with the development of LIBs, the Sodium-ion batteries (SIBs) have gradually become the limelight on the stage of renewable energy storage in th...学位：理学硕士院系专业：化学化工学院_物理化学(含化学物理)学号：2052011115158

Convexification of Nonconvex Functions

众所周知,由于上世纪70年代新的数学分支"凸分析"的出现,打破了分析数学中"线性"和"非线性"这样一个经典的却又是极不对称的分划格局,使得过去相当一部分非线性的内容(即"凸"内容),能够象线性分析那样优美地得到高度统一的处理.一切理论和应用的非线性数学问题都朝着"凸"靠近,早已经构成数学和应用数学的主流思想.本文主要针对下列三类重要的"非凸问题"用"凸化"的思想方法展开研究：(1)非凸函数的优化和扰动优化的存在性；(2)(非凸函数的)广义导数(次微分)用其局部凸化函数的次微分逼近问题；(3)度量空间(可以看作为Banach空间中的子集)上度量凸函数的基本性质与其凸化函数的关系.更多地借助局部凸...As we all know, a new branch of mathematics "convex analysis"emerged in the 1970s, it breaks the classic but very asymmetrical pattern in which mathematical analysis is divided into "linear analysis" and "nonlinear analysis" , and it makes the nonlinear analysis (that is "convex" analysis), like linear analysis, be dealt with beautifully and uniformly. It is already the mainstream of thinking ab...学位：理学博士院系专业：数学科学学院数学与应用数学系_基础数学学号：1702005140299

度量凸函数和渐近非扩张算子半群的公共不动点

证明了度量凸函数的一个类似凸分析中Brondsted-Rockafellar定理的结论,并刻画了下半连续度量凸函数的结构;证明了完备一致凸双曲度量空间上渐近非扩张算子半群公共不动点的存在性和该半群的弱星紧性.国家自然科学基金(11471270);;中央高校基本业务费专项(20720160010);;福建省教育厅中青年教师教育科研项目(JAT160371

Nitrogen Abatement Cost Functions in Jiulong River Basin

流域、湖库和近岸水体的富营养化是世界各国面临的严重水环境问题之一。我国超过50%的流域、湖库和近岸海洋面临着富营养化问题。营养盐污染引起的重大环境、经济损害及其高昂的削减成本,使得流域营养盐削减成本函数以及以此为基础的成本最低的营养盐削减最优方案成为学术界和管理界关注的热点领域。建立了中小尺度流域5种营养盐削减措施成本函数的研究方法和模型,并将建立的方法应用到九龙江北溪流域,建立了不同子流域、不同营养盐削减方式的成本函数。研究发现,不同营养盐削减措施的成本相差较大,减少化肥使用量是成本最低的营养盐削减方式,其次是建设湿地;经济发展水平、农业种植业结构是影响各子流域营养盐削减成本的重要因素,经济发达、农业经济租金较高的子流域的削减成本要高于经济发展水平低、农业租金低的子流域;在选取营养盐削减措施时,除了考虑成本之外,还必须考虑各种削减措施的规模限制。Nutrient enrichment that leads to eutrophication is one of the major environmental problems in the world.More than half of rivers,lakes and coastal water-bodies are confronting the challenge of eutrophication.The study of nutrients abatement cost functions in river basins has become the focus field in academic and management communities because of increasingly serious environmental and economic damage resulted from nutrient pollution.This paper developed the methodologies for establishing abatement cost functions of different nutrients abatement measures in small and middle river basins.These cost functions of different abatement measures in different sub-basins are established in Jiulong River Basin employing the developed models.The results demonstrate that the abatement costs vary significantly among abatement measures.The abatement cost of reducing nitrogen fertilizer use is the lowest.Meanwhile,the abatement costs in the developed sub-basins with higher agriculture economic rents are higher than that of less-developed river basins.Besides the abatement costs,the scale limit of each abatement measure should be considered when choosing suitable nutrients abatement measures.福建省自然科学基金项目(2010J01360

MESHJOIN*:An Algorithm Supporting Streaming Updates in a Real-time Data Warehouse

提出了一种新的实时数据仓库环境下的数据流更新算法——MESHJOIn*算法。算法的特性有:(1)关系r采用了分块和散列的组织形式,尽可能避免对当前连接无效元组的读取,减少连接操作所涉及元组的数量,从而提高连接算法的效率;(2)采用了多线程并发连接技术,并根据工程学原理,实现了连接操作和关系r读取操作的最佳调度,保证了连接算法效率的最大化;(3)根据当前系统的服务率和数据流元组的到达率之间的关系,合理调度实时元组和准实时元组的执行,保证了系统对实时元组的处理要求。实验结果表明,MESHJOIn*算法可以取得比MESHJOIn算法更好的性能。A new algorithm called MESHJOIN* is proposed to support streaming updates under real-time data warehouse environment.It has the following distinct features:(1) Relation R is organized in blocks and hashes so as to avoid the reading of unusable tuples for the current join operation as much as possible,through which the amount of tuples involved in a join is much reduced,thus enhancing the efficiency of the join operation;(2) Multi-thread parallel execution technology is adopted here,and the order of read operation and join operation is optimized according to engineering theory so as to maximize the efficiency of join algorithm;(3) Reasonable scheduling of real-time tuples and near-real-time tuples is achieved according to the relationship between the current system service rate and the tuples arriving rate,so that the requirement for the processing of real-time tuples is satisfied.Experimental results show that MESHJOIN* can achieve much better performance than MESHJOIN.国家自然科学基金No.50604012---

Computational Identification of Alternative Splicing in Next-Generation Sequencing Data

随着测序技术的发展,下一代测序技术(nEX-T gEnErATIOn SEQuEnCIng)给生物信息学领域研究带来了新的机遇和挑战.由于选择性剪切(AlTErnATIVE SPlICIng,AS)在真核生物基因表达和蛋白质多样性方面的重要性,识别选择性剪切位点一直都是研究的重点.下一代测序技术的出现,使得选择性剪切研究的计算方法不断地变化.介绍了选择性剪切过去和目前研究的状况,然后总结了基于rnA-SEQ数据的选择性剪切研究方法、软件以及数据库,并利用了rnA-SEQ数据比较了相关软件,最后讨论了选择性剪切中计算方法的发展方向和前景.With the development of sequencing technology,Next-Generation Sequencing brought opportunities and challenges to the bioinformatics.As the importance of alternative splicing in gene expression and protein diversity in eukaryotes,alternative splicing identification has been the focus of bioinformatics research.The computation methods for alternative splicing need to be improved since the appearance of Next-Generation Sequencing.We introduce the past and current research of AS firstly;then conclude and compare the research methods,software and databases of AS based on RNA-seq data;finally try to discuss the development and prospect of the computational methods on AS.国家自然科学基金(No.61001016;No61102136);福建省自然科学基金(No.2011J05158);厦门大学基础创新科研基金(中央高校基本科研业务费专项资金)(No.2011121049

MESHJOIN*: An Algorithm Supporting Streaming Updates in a Real-time Data Warehouse

的方法和基于模式图的方法,并详细介绍了各种方法的原理以及各自的优缺点;最后展望了未来的研究方向.The National Natural Science Foundation of China under Grant No.50604012 (国家自然科学基金

In situ dynamic tracking of heterogeneous nanocatalytic processes by shell-isolated nanoparticle-enhanced Raman spectroscopy

原位监测纳米催化反应过程对深入认识反应机理、设计高效催化剂具有重要意义。作为一种具有超高灵敏度的表面分析技术，表面增强拉曼光谱（SERS）是可提供反应过程中催化剂表面吸附物种的丰富信息。然而，仅有Au、Ag、Cu等少数金属在形成特定纳米结构时才能提供较强的拉曼增强，且它们会对催化剂的性质及反应过程产生严重干扰。这就极大地限制了SERS在实际多相催化体系中的应用。鉴于此，该论文发展了一种利用壳层隔绝纳米粒子增强拉曼光谱原位监测纳米催化过程的方法。通过将纳米催化剂组装于壳层隔绝纳米粒子表面，形成SHIENRS卫星结构，利用内核Au纳米粒子增强催化剂表面的拉曼信号，SiO2壳层隔绝Au对催化剂及反应的影响，从而直接获得了纳米催化剂表面物种的真实信息。利用这种SHINERS卫星策略，他们实现了CO氧化反应的原位监测，直接观测到了反应条件下催化剂表面吸附物种。并结合DFT计算，对反应机理进行了阐述。该研究表明SHINERS卫星策略可作为原位跟踪催化反应过程的有效方法，为纳米催化的原位研究提供了一种新的思路。 同时，我校也将在今年12月5-9日举办表面增强拉曼光谱国际会议(International Conference on SERS)，讨论SERS领域的最新进展。会议期间，SERS领域的先驱与权威Richard P. Van Duyne、Martin Moskovits、Andreas Otto以及相关学科的顶级学者Peter G. Bruce、Stefan A. Maier等将作大会报告（会议官方网站http://sers2017.xmu.edu.cn/）。【Abstract】Surface molecular information acquired in situ from a catalytic process can greatly promote the rational design of highly efficient catalysts by revealing structure-activity relationships and reaction mechanisms. Raman spectroscopy can provide this rich structural information, but normal Raman is not sensitive enough to detect trace active species adsorbed on the surface of catalysts. Here we develop a general method for in situ monitoring of heterogeneous catalytic processes through shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) satellite nanocomposites (Au-core silica-shell nanocatalyst-satellite structures), which are stable and have extremely high surface Raman sensitivity. By combining operando SHINERS with density functional theory calculations, we identify the working mechanisms for CO oxidation over PtFe and Pd nanocatalysts, which are typical low- and high-temperature catalysts, respectively. Active species, such as surface oxides, superoxide/peroxide species and Pd–C/Pt–C bonds are directly observed during the reactions. We demonstrate that in situ SHINERS can provide a deep understanding of the fundamental concepts of catalysis.This work was supported by the NSFC (21522508, 21427813, 21373167, 21521004, 21573178 and 21673187), Natural Science Foundation of Guangdong Province (2016A030308012), the Fundamental Research Funds for the Central Universities (20720150039 and 20720160046), ‘111’Project (B16029), and the Thousand Youth Talents Plan of China。 研究工作得到国家自然科学基金优秀青年基金、谱学分析创新研究群体和青年千人计划等资助