Preparation of Europium-Containing Silicon Oxynitride Phosphor doped by Magnesium with High Quantum Efficiency

利用聚合物先驱体转化法可以成功制备物化性能稳定、相结构简单的含铕硅基氮氧化物荧光粉，但其量子效率不佳，导致发光强度不够高。适量镁掺杂可以显著提高稀土掺杂碱土金属硅基氮氧化物以及铈掺杂硅基氮氧化物荧光粉的发光性能，但在聚合物先驱体转化法中掺镁对含铕硅基氮氧化物荧光粉的影响尚不清楚，因此有必要探索通过掺镁制备结构简单且具有高量子效率的含铕纯硅基氮氧化物荧光粉。本论文探讨采用聚合物先驱体转化法，以聚碳硅烷、乙酰丙酮铕和乙酰丙酮镁为原料来制备高量子效率的掺镁含铕硅基氮氧化物荧光粉。结合元素分析、XRD、SEM及荧光光谱，系统地探究了烧结方法、终烧温度和投料比对荧光粉的组成、相结构、形貌及荧光性能的影响...The europium (Eu)-doped silicon oxynitride phosphor with stable physicochemical properties and simple phase structure has been successfully synthesized via a novel polymer-derived method. However, the photoluminescence properties (quantum efficiency) of those phosphors need to be further improved. It has been found that doping with appropriate amount of magnesium (Mg) ion could highly enhance the ...学位：工程硕士院系专业：材料学院_工程硕士(材料工程)学号：2072014115011

Outlier detection based on random forest

摘要: 提出一种基于随机森林方法的异常样本 (outliers)检测方法。仿真实验表明 ,与其他 2种基于 距离的异常样本检测技术相比 ,这种方法可以更好地提高模型的准确率 ,且具有较强的鲁棒性 ,在处 理大规模数据集时还能显著地减少计算时间。Abstract: It intr oduces an outliers detecti on method based on random forest . Compared with the other t wo common outliers detecti on methods based on distance, the p roposed method can i mp r ove the performance and robustness of the model and can als o reduce the computati on ti me

Hepatitis B virus X protein and endoplasmic reticulum stress

乙型肝炎病毒(hepatitis B virus,HBV)感染与持续性肝损伤和原发性肝细胞癌(hepatocellular carcinoma,HCC)关系密切.我国是HBV感染的高流行区,给人群带来的健康威胁和损害是关注的热点问题.HBV感染是HCC的主要病原学因素之一,但其诱导肿瘤形成潜在的分子机制依然存在争议.其中HBV的X蛋白(HBV X protein,HBx)在HBV致肝细胞损伤、诱导肝细胞恶性转化、与环境因素暴露协同诱导肝致癌作用等过程中所起的作用都是研究的焦点.HBx作为多功能调控蛋白调控大量细胞信号转导通路,包括内质网(endoplasmic reticulum,ER)应激反应,值得关注的是近几年已有文献报道HBx表达对肝细胞ER应激的诱导作用,但对调控的分子机制的认识还不明确.因此,本文综述了HBx影响肝细胞ER应激的研究进展,为HBV感染诱导肝损伤和疾病的分子机制提供线索.Persistent hepatitis B virus(HBV) infection is closely related to chronic hepatitis,cirrhosis and liver cancer.China is a country with a high prevalence of HBV infection,where the infection rate is up to 60%-70%,bringing great threat and harm to public health.What's worse is that HBV infection is the main etiology factor of primary hepatocellular carcinoma(HCC).However,the underlying mechanisms of virus-induced tumor formation remain controversial.Numerous studies indicate that HBV X protein(HBx) plays a prominent role in HBV-induced liver cell damage,hepatitis,liver fibrosis and malignant transformation,and is related to liver cancer induced by environmental exposure factors.As a multifunctional regulatory protein,HBx regulates a variety of cell signal transduction pathways,including the endoplasmic reticulum(ER) stress response.ER stress refers to the dysfunction of the ER,and misfolded or unfolded proteins gather in the ER.It is noteworthy that the expression of HBx can induce or effect ER stress,although the molecular mechanism remains unclear.This review summarizes the role of HBx in ER stress pathways,providing clues for the liver injury induced by HBV infection.国家自然科学基金资助项目,Nos.81172705,81472997,81573181 973;; 计划前期研究专项基金资助项目,No.2014CB560710;; 福建省自然科学基金资助项目,Nos.2014J01372,2015J01344~

论银行内部建立评估及监督机构的必要性

美国次贷危机给全球金融机构提出了新的挑战,探索回避信用风险、市场风险、操作风险新课题,最大限度地控制不良贷款的是金融业重要任务之一,本文仅从抵押贷款评估源头入手,分析评估机构目前现状,银行内部管理存在的弊端,以

Partial Regularity for Weak Solutions of Nonlinear Elliptic SYstems with Dini Continuous Coefficients

本文我们研究在自然增长条件下，具有Dini连续性系数的非线性椭圆方程组弱解（其梯度指标为m=2及1<m<2）的正则性问题。对于部分正则性证明的经典方法是“凝固系数法”，即通过“凝固系数”的到常系数方程组再把解跟由“凝固系数”后得到的长系数方程组所构成的Dirichlet问题的解进行比较，得到重要的衰减估计并进行标准迭代，从而推出部分正则性结果。其中需要用到复杂而繁琐的反Holder不等式或Grotowski引理，而且得到的Holder指标不是最优的。即：Holder正则性指标低于已知系数函数的Holder连续性条件中的指标。本文采用部分正则性研究的新的方法A-调和逼近方法，来研究具...In this paper, we consider regularity of weak solutions of the nonlinear elliptic systems of divergence form with Dini continuous coefficients under the controllable growth condition and natural growth condition. In most direct proof of partial regularity, one uses the method of "freezens the coefficients" toobtain the disired result. Precisely, by "freezens the coefficients",we obtain an ell...学位：理学硕士院系专业：数学科学学院数学与应用数学系_应用数学学号：X200517002

A Study on Local Government Behavior and Regional Effect of Monetary Policy in China—Concurrent Discussion of Region Dividing

传统货币政策效应的研究隐含了货币政策执行效果对于整个经济是一致的假设，忽视了货币政策效应的地区差异性影响。我国幅员辽阔，由于不同区域自然禀赋、国家政策、产业结构等诸多因素不同导致区域间经济发展极不平衡。然而我国宏观调控政策的制定更多的是以经济较发达地区的经济运行为参照系。这样，统一的宏观调控政策措施在一定程度上加剧了我国区域经济发展的不平衡，因此，研究货币政策效应的区域差异性，对于优化和改善货币政策的制定，促进区域经济的协调可持续发展具有重要的现实意义。 本文应用向量自回归模型和广义脉冲响应函数对我国各省市的研究表明，我国存在明显的货币政策区域效应，并且发现传统的区域划分方法是不合适的，从理...The conventional study on the effect of monetary policy implies that the effect of the monetary policy is consistent within the whole economy, and it ignores the difference in areas. In such a large country, our regional economic development is imbalance because of many reasons. However, our policymaking is aiming at the developed areas, and this will strengthen the imbalance of the economic growt...学位：经济学硕士院系专业：经济学院金融系_金融学(含保险学)学号：1562009115174

The comparative study on four-character idioms’ definition of Chong Bian and Xian Han

本文基于成语的重要性和海峡两岸合编词典计划开启这两个缘由，选取了大陆和台湾的权威性综合性语文词典《重编国语辞典修订本》和《现代汉语词典》，对其共有的530个四字成语的释义进行对比研究。释义对比主要围绕意义成分的覆盖情况、释义特征词的选用、语源的标注、词例的选用四个方面进行。通过对比，发掘出两部词典在处理成语释义时的差异，进而分析差异产生的原因，并对海峡两岸合编综合性语文词典提供建议。 两部词典的四字成语释义的差异主要有：在释义的意义成分方面，《重编》多收录成语的非常用义即典故说明、本义和字面义，《现汉》则大多只收录常用义，对参照释义的处理也有不同之处。在释义特征词的选用上，《重编》倾向于选用...Based on the idiom’s importance and the Cross-Strait’s plan of cooperating to compile dictionary, this paper selects the Mainland and Taiwan’s authoritative and comprehensive Chinese dictionary Chong Bian and Xian Han to comparative and analysis their 530 four-character idioms’ definitions. The definitions contrast mainly include the coverage of meaning components, the selection of definition feat...学位：文学硕士院系专业：人文学院_语言学及应用语言学学号：1022011115224

Load Balancing Algorithm for Path Planning Based on Shared Memory

为满足前端对路径规划高并发服务需求,本文设计后台采用集群路径规划服务器来实现并行处理,以达到对前置Fast CGI服务器请求进行分流的目的。由此,本文提出基于共享内存的路径规划负载均衡算法,可根据不同路径规划服务器的性能差异,设置相应的加权系数,并按照加权调度算法,将任务交由合适的路径规划服务器来处理,以均衡所有路径规划服务器之间的负载能力,减少服务延迟,从而提高了路径规划服务的稳定性、扩展性、高可用性和执行的效率。To meet the front end on the path planning for high concurrency service needs,this paper designs background using cluster path planning server to realize parallel processing,in order to achieve the diversion for the prepositive Fast CGI server requests.Thus,this paper presents the load balancing algorithm for path planning based on shared memory,which can set the corresponding weighting coefficient based on the differences in the performance of different path planning server,and according to the weighted scheduling algorithm,the task to be processed by the appropriate path planning server.The result shows that this way can not only balance between all path planning server load capabilities,but reduce the server delay,so as to improve the stability of path planning service,expansion,high usability and execution efficiency

Comparative Study of Articles in Chinese Textbooks in Primary and Secondary Schools between China Mainland and Taiwan

中国大陆与台湾中小学语文课程教学在“课程性质与理念“、“课程目标“、“学段划分“、“学段目标“、“语文知识与能力培养“等方面有基本相同的追求与规定,但二者的理念、风格、技术路线及具体的处理方法,仍有着相当大的差异。文章对比分析了两地各两套语文教材课文的基本构成、作者的国别地区和时代以及文体,发现大陆的课文篇数、篇幅多于、长于台湾课文;大陆教材重收录外国作家作品,台湾教材重收录本地作家作品;相同文体内部课文差异大。而选文的差异是两地课文的词种、词频、独用词性质存在差异的原因。Chinese courses in primary and secondary schools in China mainland and Taiwan have approximately same pursuits and provisions in course nature and concept, course objectives, division of school segment, segment's objectives, language knowledge and capacity building, but there are considerable differences in concept, style, technology roadmap, and specific processing method.This paper compares the basic structures, authors' nationalities and eras, articles' styles in two editions of teaching materials in both mainland and Taiwan.It shows that the mainland's article's quantity and scope are bigger than Taiwan's, and mainland's teaching materials focus on foreign authors' works while Taiwan's on local authors' works.Even in the same article style, there exists a big difference.All these differences lead to the differences of word species, word frequency, and single word's property between mainland and Taiwan's teaching materials.“国家语言资源监测与研究教育教材语言中心”2013年资助课