Study on the History and Practical Effect of Education Donation of the Hometown of Overseas in Quanzhou

泉州市素有“海滨邹鲁”之称，是我国华侨华人重要的祖籍地之一，为我国重点侨乡。华侨华人延续了我国捐资兴学的传统美德，从清末开始就推动着侨乡教育的发展。改革开放之后，侨乡当地经济实力提升，促发了当地企业或个人捐资兴学力量的形成。汇集一起的两股捐资兴学力量对侨乡地区教育发展起着重要的促进作用，推动了区域教育现代化的发展。因此，通过对泉州捐资兴学活动的历史考察与现实作用分析，可以探析当代侨乡捐资兴学的重要特征，求解困扰侨乡捐资兴学发展的难题。 论文共分为五章。第一章为导论，主要说明选题的意义、研究的现状及相关概念的界定；第二章是对清末至改革开放前泉州捐资兴学的历史追溯；第三章是对改革开放以来泉州捐资...Quanzhou is one of the famous hometown of overseas in China and is called “Hai bin zou lu”．The overseas carry forward the traditional education donation virtue and promote the development of education donation in the hometown from the late Qing Dynasty．After the reform and opening，the strength of the education donation of the local enterprise and people come into being because of the economy devel...学位：教育学硕士院系专业：教育研究院_教育史学号：2572006115276

リモートセンシングと生物・地球物理学的モデルを用いた永久凍土地帯からのメタン発生量の推定

学位の種別: 課程博士審査委員会委員 : (主査)東京大学准教授 竹内 渉, 東京大学教授 柴崎 亮介, 東京大学准教授 沖 一雄, 東京大学准教授 今須 良一, 奈良女子大学教授 林田 佐智子University of Tokyo(東京大学

The Implementation and Application of Tax Data Visualization Based on the GIS

摘要 近年来，国家税务总局积极推行征管改革和科技兴税的工作方针，信息化建设取得了明显成效。在前几年信息化应用的基础上，各省、市系统均积累了数年的涉税数据，为快速适应税务征管改革和科技兴税的工作方针，提高信息管税的能力，急需加强各省市税务信息的分析和监控能力，建立良好的数据处理分析系统和监控分析系统，而这也为税务信息资源的可视化提出了要求。GIS（GIS，GeographicInformationSystem）是将客观环境中存在的信息资源数字化、抽象化和直观化的一种管理分析平台技术，业已展现出的强大而广泛的功能正被人们投向多领域应用。本文基于GIS技术平台对税务数据可视化进行了探讨研究。 数...Abstract In recent years, due to the working policy proposed by the State Administration of Taxation, informatization has obtained apparent achievement. Based on the informatization application in recent years, the tax systems had accumulated several years of tax-related data. In order to quickly adapt to the working policy of administration reform, which promotes tax policy and improves in...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201023054

New MFL detection method based on differential peak extraction using dual sensors

为了提高管道、储罐漏磁检测的准确度、灵敏度,同时抑制噪声干扰,提出了一种双传感器差分峰值侦测的漏磁检测新方法。首先,对实际漏磁检测过程存在的背景噪声进行分析,研究了检测器振动、磁隙变化、磁轭泄漏等噪声源的共模特性;其次,利用缺陷漏磁场的分布特点构造了一种新型的差分侦测结构,该结构既可对噪声进行共模抑制,又可实现缺陷特征信号的差模提取;再次,依托磁偶极子模型,对所提方法的机理进行了分析,并讨论实现该方法所需要的约束条件及其检测灵敏度特性;最后,开展了仿真和物理实验,实验结果表明,该方法的噪声仅为传统X分量检测的5%,Y分量检测的26%,且检测敏感度提高了2倍。该方法为优化漏磁检测器结构、提高检测的可靠性及灵敏性提供了一个新的思路。In order to improve the accuracy and sensitivity of pipeline and storage tank magnetic flux leakage( MFL) detection,as well as suppress noise interference,a new MFL detection method based on differential peak extraction using dual sensors is proposed. Firstly,the background noise in actual MFL detection process is analyzed and the common mode characteristics of the noise sources,such as sensor vibration,magnet gap change,magnet yoke leakage and etc. are studied. Next,a new differential detection structure is built based on the distribution characteristics of the defect magnetic flux leakage,which can restrain the common-mode noise and realize the differential extraction of the defect feature signal. Then,based on the magnetic dipole model the mechanism of the proposed method is analyzed,the restraint conditions required for realizing the new method and the detection sensitivity characteristic of the method are discussed. Finally,simulation and experiment study were conducted,and the results show that the noise with the new method is only 5%of the one with traditional X-component detection,and 26% with traditional Y-component detection. Moreover,the detection sensitivity is improved twice. The proposed method provides a new strategy for optimizing the MFL detection sensor structure,and improving the detection reliability and sensitivity.国家自然科学基金(51177141);; 航空基金(2012ZD68003)项目资

合作:数字参考服务的社会选择

基于用户需求的数字参考服务必然采用社会合作形式。本文着重探讨图书馆发展数字参考服务的合作策略

Novel MFL method for pipeline crack no blind spot detection using composite excitation

管道是石油和天然气工业的重要组成部分,而轴向裂纹是管道安全运营的重要隐患。传统的漏磁检测技术(MFL)对管道中轴向裂纹的检测灵敏度不高,从而形成检测盲区。本文提出了一种利用复合激励的MFL检测新方法,可实现对轴向和周向缺陷的同步检测。首先,利用U型磁轭对管壁进行交直流复合磁化;直流磁化场直接作用于周向裂纹并形成有效的MFL检测信号,而交流磁化场则在管壁内形成垂直于磁化方向的均匀涡流场;当该涡流场受到轴向裂纹干扰时,将形成二次感生磁场的扰动,因此,新方法通过对管壁表面的漏磁场及二次感生磁场检测,同时获得周向和轴向两个方向的探测能力;最后开展仿真和实验,并分析了新方法中作用于轴向和周向裂纹的磁化场、涡流场和二次感生磁场的分布。结果表明,新方法只需通过一次扫描,即可以获得缺陷的轴向和周向特征,实现了对裂纹的无盲点检测。Pipelines are the critical components in oil and gas industry,axial cracks caused by stress corrosion and fatigue damage are the hidden danger of pipeline safe operation. The conventional magnetic flux leakage( MFL) detection technique is inadequate for accurately detecting the narrow axial crack in pipeline and forms detection blind region. In this paper,a new MFL detection method capable of simultaneously detecting both axial and circumferential defects is proposed utilizing DC-AC composite excitation. Firstly,the measured pipe wall is magnetized by DC-AC compound magnetic field using a U-shaped yoke. The DC magnetic field is directly acted on the circumferential crack and generates effective MFL detection signal. The AC magnetic field generates a uniform eddy current field perpendicular to the magnetization direction inside the pipe wall. When the eddy current field is disturbed by the axial crack,a secondary induced magnetic field is generated. Through detecting the surface magnetic flux leakage and secondary induced magnetic field,the new method can obtain the axial and circumferential crack detection capability simultaneously. Both simulations and experiments were conducted,the distributions of the magnetizing field,eddy current field and secondary induced magnetic field acting on the axial and circumferential cracks were analyzed. The results show that the proposed new method can detect both axial and circumferential cracks effectively with one pass scanning,the pipeline crack no blind spot detection is achieved.国家自然科学基金(51177141,51677158);; 航空基金(2012ZD68003)项目资

New NDT method for ferromagnetic materials based on differential permeability

利用微分磁导率变化特性,提出了一种可对材料的宏观缺陷进行快速扫查的无损检测新方法。首先,将铁磁性材料置于偏置磁化场环境下,缺陷将导致内部磁通的畸; 变;其次,磁通畸变进一步体现在材料表面微分磁导率分布的差异性;再次,通过特殊设计的微分磁导率检测探头,对材料表面微分磁导率的分布进行扫查;最后,; 由磁导率分布差异获得材料内部的不连续性信息,从而实现对缺陷的无损检测。开展了系列验证实验,结果表明,相对于传统的漏磁检测方法,新方法具有磁化强度; 低、磁通泄漏少、检测信号稳定的特点。新方法正、反面缺陷探测信号存在差异,在缺陷深度识别方面亦存在优势。A new non-destructive testing method is proposed to fast scan and detect; the macroscopic defects of materials using the variation characteristics; of the differential permeability of ferromagnetic materials. Firstly,the; ferromagnetic material,such as steel plate,is placed under the bias; magnetic field,and the defects in the material will inevitably lead to; the distortion of its internal magnetic flux. Secondly,the magnetic flux; distortion is further reflected in the difference of the differential; permeability distribution on the surface of the tested material.; Thirdly,using a specially designed probe,the distribution of; differential permeability on the surface of tested material is rapidly; scanned. Finally,from the difference of the differential permeability; distribution,the discontinuity information in the material can be; obtained,so as to realize the nondestructive testing of macroscopic; defects. Series of experiments were carried out,and the results show; that,compared with traditional magnetic flux leakage method,the new; method has the advantages of low magnetic intensity,less flux leakage; and stable detection signals. Moreover,the detection signals for the; front-side and back-side defects have obviously different distribution; characteristics,and the method also has obvious advantages in the field; of defect depth identification.国家自然科学基金; 福建省科技计划重大专

几种典型羟基化多溴联苯醚和多溴联苯的合成、纯化及鉴定

通过耦合、氧化和溴化等基本有机化学反应,合成并纯化了几种典型羟基多溴联苯醚和多溴联苯.通过C18半制备高效液相色谱柱对反应粗成品进行分离与纯化,以气相色谱-质谱和氢谱核磁共振对产物进行结构鉴定与表征.结果表明,合成制备的产物与目标物一致,纯度达99%以上.国家自然科学基金(21277124;21477115)资

学术图书馆的组织边界与社会网络构建

数字时代，图书馆普遍存在的物理边界、社会边界和心理边界日益复杂化。人际关系网络分析表明，随着技术影响的增强，来自行政官僚阶层的纵向的强信号可能导致图书馆边界日益模糊，却依然占据主导单位；来自个体的弱关系网络已经趋于活跃，导致图书馆边界的多元化，发挥着辅助的作用。厦门大学图书馆的实践证明，在图书馆组织的外部边界应该开放的同时，其组织内部也应该是互相开放的的；跨边界沟通与合作可以提高组织效率，再生产社会资源，促进图书馆的创新和发展

Density Functional Theory Calculations of the Influence of Weak Hydrogen Bonding Interactions on the Raman Spectra of Thiourea in Aqueous Solution

将拉曼光谱和密度泛函理论(dfT)计算结合能够把拉曼谱峰和分子结构及分子间氢键作用之间的变化联系起来,反映分子周围的结构信息.本文通过理论计算水分子和硫脲形成复合物的拉曼光谱,并结合实验报道的拉曼光谱,探究硫脲基频对分子局域结构的依赖性.通过轨道分析,发现水分子的氢键作用可以引起硫脲的前线轨道对易,这将影响到硫脲的拉曼光谱性质.最后计算也表明在中性水溶液中由于大的正gIbbS自由能变,硫脲不易发生异构转变.Raman spectroscopy combined with density functional theory(DFT) calculations provides information at the molecular level to understand weak intermolecular interactions relevant to molecular structures.In this work, the influence of the fundamental properties of thiourea on the Raman spectra of thioureawater complexes was investigated using DFT calculations.The results showed that hydrogen bond interactions can change the order of the frontier orbitals and directly influence the Raman spectra of thiourea.In addition,the keto-enol tautomerization of thiourea cannot occur in neutral aqueous solution because of the large positive Gibbs free energy change.国家自然科学基金(21373172;21321062)资助项目~