《无机材料合成》课程的教学探讨

无机材料合成是材料科学的专业基础课。文章结合笔者实际教学过程的经验和对该课程的教学方面的思考,从教学内容、教学目的、教学方式、教学效果等几个方面对《无机材料合成》课程教学进行初步探讨。在课程教学过程中实现内容上经典与新颖性相结合,教学方式上传授与启发相结合、传统工具和现代化多媒体工具相结合,教学思想上精确系统性与人文渗透相结合,目的是使学生系统地了解课程涉及的知识,同时提高专业素质、科学修养以及科研兴趣

Contrarian and Momentum Effect in Chinese Stock Market

有效市场假说认为，所有可获得的信息都已在价格中充分体现，投资者不可能通过分析已有信息获得超额收益。各类金融异象表明有效市场假说或许并不成立。大多数金融异象在发现后都会引起投资者的广泛关注，进而逐渐消失，但目前依然没有证据表明动量效应和反转效应已经消失或正在消失，故而引起了大量研究者的兴趣。目前，针对美国等成熟市场的研究表明动量效应主要存在于3-12个月的观察期和持有期，而反转效应则存在于1年以上。 我国股票市场成立二十余年，规模和效率都发生了翻天覆地的变化，在我国经济发展中起到举足轻重的作用。对我国股市的规律变化进行全面的研究，得出清晰可信的结论是十分必要的，不仅能促进投资者理性操作，促进市...Efficient Market Hypothesis (EMH) implies that all information about the security market can be reflected in the stock price promptly. Investors cannot get excess returns based on the public information. All kinds of financial anomalies show that the stock market doesn’t work as EMH. Most financial anomalies cased widely attention of investors, and then gradually disappeared. But there isn’t any e...学位：金融硕士院系专业：经济学院_金融学(含保险学)学号：1562011115199

Design and Implementation of Guarantee Business Online Acceptance Platform

随着经济全球化程度的不断加深，国际资本流通趋势越来越明显，中国自从加入世贸组织后，与世界经济联系日益紧密，担保行业作为一个新兴行业，开始进入中国资本流通领域，中国的担保行业面临着规模小、行业法规不完善、监管力度不到位、担保成本高、风险大等不利因素，如何设计一个担保业务在线受理平台来有效规范担保行业的秩序，降低担保行业的成本和金融风险，简化担保业务的流程，提升担保业务的效率，成为亟待解决的问题。 论文通过深入研究担保业务的流程，结合担保行业的风险特点和法律法规，应用软件工程和面向对象思想，在MicrosoftVisualStudio2003、MicrosoftSQL2000、Eclipse、W...With the deepen of economic globalization degree, the trend of international capital circulation is more and more obvious, since China's accession to the WTO,the relation between World and China is becoming more and more closer,guarantee industry as an emerging industry, begin to enter China's capital circulation field, China's guarantee industry is faced with small size, industry, imperfect laws ...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201123053

CaCu_3Ti_(4+x)O_(12+2x)陶瓷的电学性能

采用传统的固相合成方法在1100℃,保温3 h制备了不同Ti含量的CaCu3Ti4+xO12+2x陶瓷(x=-0.5,-0.2,0,0.2,0.5)。通过XRD分析了CCTO的相组成;在-20~100℃温度范围内、500 Hz~1 MHz的频率范围测量了CaCu3Ti4+xO12+2x陶瓷的介电特性和阻抗特性。Ti的化学计量变化明显的影响了CCTO陶瓷的电学性能,系统对比发现Ti的含量偏离CaCu3Ti4O12的化学计量比,会显著的降低CCTO陶瓷的介电常数,同时增加介电损耗

Preparation and Electrical Properties of CaCu_3Ti_4O_(12) Thin Ceramic Sheets via Water-based Tape Casting

片式CACu3TI4O12陶瓷由于其巨介电效应,用于制备多层陶瓷片式电容具有重大意义。通过水基流延法并在不同的烧结温度下制备的片式CACu3TI4O12陶瓷具有优异的介电性能。其中在1080℃下烧结的样品在保持巨电容率(98605)的同时,降低了介电损耗,其值只有0.028,远低于其他报道的损耗值。同时,测试了CCTO陶瓷薄片的复阻抗图谱,讨论了CCTO陶瓷的特殊的电学性能。实验结果表明,通过流延成型制备的CCTO陶瓷薄片在保持巨电容率的同时具有很低的介电损耗,这为CCTO陶瓷在微电子工业上的应用提供了可能性。Thin ceramic sheet of CaCu3Ti4O12 has a great significance for preparation of multiplayer ceramic chip capacitors.In this work, a simple plan was made to achieve CaCu3Ti4O12 thin ceramic sheets with excellent dielectric properties.Thin ceramic sheets of CaCu3Ti4O12 were prepared via water-based tape casting at various sintering temperatures.The CaCu3Ti4O12 samples sintered at 1080℃ exhibit a great performance on dielectric properties with high permittivity(εr=98605) and low dielectric loss(tanδ=0.028) which are better than those of samples prepared by conventional dry pressing.Meanwhile, the complex impedance spectra were measured to explain the mechanism of special electrical behaviors of CaCu3Ti4O12 ceramics.These testing results indicate that the CaCu3Ti4O12 ceramics via tape casting exhibits a better performance of giant permittivity and lower dielectric loss than other reports, which provides a possibility for the application of the CaCu3Ti4O12 in modern micro-electronics technology.FundamentalResearchFundsfortheCentralUniversities(2010121052); NationalNaturalScienceFundofChina(51202204

Synthesis of plate-like SrTiO3 particles

Conference Name:2010 International Conference on Optical, Electronic and Electrical Materials, OEEM2010. Conference Address: Kunming, China. Time:August 1, 2010 - August 4, 2010.National Science Foundation of China; Trans Tech PublicationsMicro-scale plake-like SrTO3 particles were synthesized by two routes of topochemical conversion. One is by growing on Sr3Ti 2O7 (S3T2) core particles in molten salt condition, and the other is from the layer-structured SrBi4Ti4O 15 (SBT) precursor in a KCl medium. The effects of the morphology and size of the precursor to platelet SrTiO3 crystals were studied. X-ray diffraction analysis revealed that the crystallographic {010} plane of SBT was converted into the pseudo-cubic {001} plane of SrTiO3. The polycrystalline SrTiO3 particles from BST precursor exhibited a plate-like shape with 10-15μm in length and a high aspect ratio, and were more suitable for preparing textured ceramics by templated grain growth process than the platelets from the S3T2 precursors. ? (2011) Trans Tech Publications

我国无居民海岛开发利用现状研究

我国无居民海岛开发利用最早起源于新石器时代,距今已有超过6000年的历史。无居民海岛在自然资源、领海基点、国防以及科学研究等方面都具备重要的价值,但其开发与利用的现状却不容乐观。尽管国家出台了一系列政策用以规范无居民海岛的开发利用,但总体上偏远区域无居民海岛开发无人问津,部分区域无居民海岛无序与无度开发利用的现象长期存在。因此,文章旨在通过文献综述,梳理我国无居民海岛使用的现状。主要内容包括:国内外无居民海岛开发利用主要研究现状,包含环境承载力、使用权属以及价值评估等方面;我国无居民海岛开发与保护的法律、政策支撑;我国无居民海岛开发利用的实践情况等。从而为无居民海岛的深入研究提供基础性资料,服务于无居民海岛的开发利用与综合管理。福建省海岛与海岸带管理技术研究重点实验室开放基金“我国无居民海岛开发利用现状研究”;;福建省公益类科研院所专项(2015R1006-9

福建省流动人口门诊需求行为及影响因素分析

目的通过对福建省流动人口的门诊医疗需求、门诊医疗服务利用现状及其影响因素的分析,为提高流动人口的健康水平,促进基本公共卫生服务均等化提供参考依据。方法基于2017年全国流动人口动态监测调查数据福建省资料,利用STATA 12.0软件进行统计分析。结果 2016年5—2017年5月,福建省6 999名流动人口调查对象患病后的就诊率为61.92%(2 492/4 025),选择在本地个体诊所就诊的比例最大、为23.85%(960/4 025);相对于家庭月收入≤5 000元的人群,5 001～10 000元(P=0.011)和> 10 000元(P=0.009)的人群患病后就诊的可能性更大;新型农村合作医疗保险的参加情况为是否就诊(P <0.001)和就诊地点选择(P=0.004)的双重影响因素,而参加城镇医疗保险的流动人口可能存在过度利用的情况(P=0.030)。结论流动人口门诊医疗服务利用不充分,家庭月收入、医疗保险的参加以及受教育程度是门诊服务利用的重要制约因素。厦门大学繁荣哲学社会科学项目成果(0220–Y07200);;\n厦门市2017年流动人口动态检测项目(K8218001

一种新型无酶电流型葡萄糖生物传感器

采用电聚合过氧化聚吡咯(Ox-PPy)于铅笔芯电极(PGE),并将酞菁钴(CoPc)对其修饰,制作了一种新型无酶电流型葡萄糖生物传感器。实验结果表明:在优化条件下,传感器的灵敏度为6.42μA/(mmol/L),线性范围0～10 mmol/L,线性相关度R=0.992 9,响应时间小于10 s,最低检测限为70.1μmol/L.该传感器具有较高的灵敏度,较好的稳定性和一定的抗干扰能力

Preparation and dielectric properties of CaCu3Ti 4O12-(NaBi)05Cu3Ti 4O12 composites

Conference Name:2011 International Symposium on Advanced Packaging Materials, APM 2011. Conference Address: Xiamen, China. Time:October 25, 2011 - October 28, 2011.The composites of CaCu3Ti4O12-x(NaBi) 0.5Cu3Ti4O12, i.e. CCTO-xNBCTO, were prepared for x value from 0 to 0.1. Ultrahigh dielectric constant, ψ =7×105, and dielectric loss, tanδ = 0.48, of the composites with x=0.05 were obtained. The relations between crystal structures with XRD spectra and dielectric properties with LCR measurement were investigated, in which. An internal barrier layer capacitance effect is used to explain the mechanism of such dielectric behavior. The frequency dependence of the dielectric constant of CCTO-NBCTO composites were measured from 20Hz to 1MHz, showing that the loss tangent apparently decreased with the increase of frequency. The temperature dependence of both the dielectric constant and loss tangent of the samples were also obtained. It was found that the dielectric properties was almost independent of temperature in the range from -20°C to 80°C, however, the loss tangent were increased dramatically with a further increase in temperature, above 80°C. ? 2011 IEEE