OFDMを用いるヘリコプタ衛星通信システムの遮断回避に関する研究

電気通信大学201

Preliminary Studies on Asymmetric Synthesis of Chiral Metal Complexes and Application of Redox-driven Chiroptical Switch

手性金属配合物在不对称催化、手性识别、手性功能材料和器件以及手性起源等领域引起了人们的极大兴趣。其中，手性光学开关研究在近年来获得越来越多的关注。因此手性金属配合物的不对称合成(包括绝对不对称合成和立体选择性合成)以及氧化还原手性开关的研究具有基础研究意义和潜在重要应用价值。 本论文以含有手性金属中心的Co(III)和Ru(II)配合物作为研究对象，开展手性金属配合物的不对称合成与氧化还原手性开关应用的初探。主要研究内容包括以下几方面： 1.通过绝对不对称合成获取对映纯度较高的手性cis-[CoBr(NH3)(en)2]Br2作为手性晶种，再以手性晶种诱导定向合成手性cis-[CoBr(N...Chiral metal complexes have received considerable attentions in the fields of asymmetric catalysis, chiral discrimination, chiral functional materials and devices, origin of chirality and so on. Specially, more and more attention has been paid on the chiroptical switch research in recent years. Therefore, the asymmetric synthesis or chiralselective synthesis of chiral metal complexes and their red...学位：理学硕士院系专业：化学化工学院化学系_无机化学学号：2052008115162

SDS effect on formation kinetics and microstructure of methane hydrate

表面活性剂是促进水合物生成的有效手段之一。在高压反应釜中研究了十二烷基硫酸钠(SDS)对水合物生成过程的动力学影响，利用XRD和拉曼光谱探究了SDS存在条件下水合物的微观结构。宏观结果表明SDS缩短了诱导时间，加快了水合物生长速率。微观结果表明SDS没有影响s I型水合物的晶型结构，晶面间距与理想s I型水合物及纯水甲烷对比误差在千分之几。水合物中甲烷在大笼小笼中的拉曼位移分别为2904和2915 cm-1，SDS没有改变大笼小笼结构。大笼绝对占有率(?L)接近饱和时，SDS可以进一步提高小笼绝对占有率(?S)，从微观角度证明了SDS可以减少水合数，提高储气率

Sdudy on Electroless Deposition of Platinum on Titanium Substrates in Alkaline Bath

钛基镀铂已经被广泛应用在航空航天、耐蚀性材料、电解工业、船舶的阴极保护等领域。但对其工艺方面的研究以电镀铂为主，化学镀很少。然而化学镀本身不存在电镀中由于工件几何形状复杂而造成电力线分布不均、均镀能力和深镀能力不足等问题，所以对钛基的化学镀铂研究是必要的。本文在前人工作的基础上，提出把一种碱性化学镀铂浴应用在钛平板和多孔钛板基材的化学镀铂上。通过大量试验对钛基材的镀前处理、化学镀浴各组分的浓度比例、化学镀诱发过程以及镀后的热处理等方面进行了研究，最终在钛基材上获得了结合力良好的镀层，提出了最佳的施镀工艺条件，从而优化了钛基化学镀铂的实际操作过程。 本论文分为四章： 第一章，介绍了钛基镀铂材...The platinum-plated titanium is already widely applied in aviation, corrosion-resistance material, electrolytic industry, ship negative electrode protection and so on. However, the technology about platinum plating on titanium gives first place to electroplating, and reports about electroless plating are very few. However, there many disadvantages which don’t exist in electroless plating in electr...学位：理学硕士院系专业：化学化工学院化学系_物理化学(含化学物理)学号：20042506

Study on Determination of Potassium, Sodium, Magnesium, Calcium and Ammonium in Corns by Ion Chromatography

玉米中所含的许多矿物质都是人体重要的营养物质。如钠、钾可以调节细胞和血液的容量;钾还参与蛋白质、碳水化合物的代谢,帮助活化国家自然科学基金资助项目(No.20527005

Research on the rapid inactivation of typical algae blooms by hydroxyl radical

以典型水华藻铜绿微囊藻、针杆藻和四尾栅藻为研究对象,利用大气压强电离放电高效生成的羟基自由基(·OH)对3种藻进行杀灭.采用荧光染色、流式细胞仪; 和光合活性等生物学方法,确定·OH杀灭的阈值浓度和时间,并观察细胞形态变化.结果表明,当混合藻中铜绿微囊藻、针杆藻和四尾栅藻的初始藻密度分别为1; 9.5*10~4、21.8*10~4和4.90*10~4cells/mL时,; ·OH杀灭的阈值浓度为1.07mg/L,致死时间为4.5s;形态观察结果表明,处理后各种藻的形态是完整的,无内溶质溢出.因此,采用·OH可实现高; 效快速杀灭水华藻,有效保障饮用水安全.Algae blooming in water sources breaks out increasingly and seriously; threatened the water supply safety. Bench scale tests were conducted to; study the effects of ·OH generated from strong ionization discharge and; high pressure water jet cavitation on cell density, cell integrity and; photosynthetic capacity of 3kinds of typical freshwater algae. Algae; species including Microcystis aeruginosa, Synedra sp., and Scenedesmus; quadricuauda were respectively prepared at concentrations of 19.5*10~4,; 21.8*10~4 and 4.90*10~4 cells/mL, and the cell integrity was assessed by; flow cytometry. Results suggested that the ·OH lethal threshold of the; algae was 1.07mg/L within the exposure time of 4.5s. The cell; morphological observation results showed that all the cells were; integral and no cytoplasm composition spilled. Hence, large-scale; production of ·OH is a novel method to inactive typical algae species; efficiently and to protect drinking water safety simultaneously.国家科技支撑计划资助项目; 国家重大科研仪器研制项

Test Method Study on Printed Circuit Board Cleanness

对离子色谱法检测印刷电路板清洁度的IPC(电子电路互连和包装标准)方法做出了进一步改进,提出了水浴加热联合氮吹样品的前处理方法,有效的去除了异丙醇对测量的干扰,而且对样品进行了浓缩;对样品中的有机酸进行了有效的分离和检测。结果表明,该前处理方法干扰小,可以使检测结果更准确,检测限为3 ng/mL(以Cl–计)。The IPC’s test method on cleanness of printed circuit board were improved.Water bath-heater combined with nitrogen-blow was proposed as a disposal method of sample.Interference of isopropanol on measure was removed effectively,and the sample was concentrated.Weak organic acids in the sample were separated effectively and examined successfully.The results show that this disposal method could make the result more exact,and its interference is small.The detection limit is 3 ng/mL(Cl–).国家自然科学基金资助项目(20527005

公共服务水平与经济发展水平相适应机制建设的本土探索——厦门市的案例研究

本文是厦门市社会科学调研课题资助项目——“厦门建立公共服务水平与经济发展水平相适应机制的研究“课题报告(全文5万余字)的摘要。该研究报告对公共服务与经济发展二者之间的相关性及其影响程度进行理论分析与实证检验;利用“公共服务——经济发展动态均衡模型“,对“十二五“时期厦门市公共服务与经济发展的相关性做出预测;尝试构建公共服务水平与经济发展水平相适应的机制;从建设服务型政府、确立最优公共服务水平、明确公共服务合理支出以及保障公共服务有效供给等方面提出了关于厦门市公共服务水平与经济发展水平协调发展的对策思考。2011年度厦门市社会科学调研课题资助项目;厦门大学“985工程”-公共管理重点学科;厦门大学“211工程”三期-“公共政策与政府治理”建设项

A Journey into the City. Migrant Workers' Relation with the Urban Space and Struggle for Existence in Xu Zechen's Early Jingpiao Fiction

In contemporary China, rural-urban migrants constitute a new urban subject with entirely new identity-related issues. This study aims at demonstrating how literature can be a valid field in investigating such evolving subjectivities, through an analysis of Xu Zechen’s early novellas depicting migrants’ vicissitudes in Beijing. Combining a close reading of the texts and a review of the main social problems characterising rural-urban migration in China, this paper focuses on the representation of the identity crisis within the migrant self in Xu’s stories, taking into account the network of meanings employed by the writer to signify the objective and subjective tension between the city and the countryside