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

国内外道路声屏障的研究与发展

【中文文摘】道路声屏障是控制交通噪声、保护城市居住环境的重要设施。本文作者通过对国内外道路声屏障的研究与发展的分析，为我国道路声屏障的研究、应用与开发提供一些可资借鉴的方法。河南省科技攻关项目!98114021

镓在抗菌方面的研究进展

抗生素发现\"黄金时代\"的结束以及日趋严重的抗生素耐药性问题给我们留下一个戏剧性的、缺乏新型药物来防治耐药病原体感染的难题。这使得从现有非抗生素药物中筛查抗菌活性药物成为一种新尝试。近期研究表明:美国食品药品监督管理局(FDA)批准的、本来用于治疗高血钙的药物硝酸镓具有良好的抗菌活性。不同于其他抗生素,镓的药理性质依靠化学拟态,它可以在目标酶分子中取代铁,从而干扰、扰乱细菌含铁蛋白的功能及细菌代谢,无论是在体外实验还是在体内实验中,镓对多种病原体,包括多重耐药病原体都表现出杀菌活性。因此一些含镓制剂有望被开发成有潜力的非传统抗菌药物,帮助治疗多重耐药细菌感染。国家自然科学基金(No.81673242、No.81473251、No.31741006、No.31370166和No.81301474);;福建省自然科学基金(No.2014J01139和No.2015J01345);;厦门大学校长基金(No.20720160060

药品零差价政策对公立医院财务运行的影响及对策

本文对厦门市公立医院2012(医改前)~2015年经济运行各项指标的变化以及药品零差价销售损失的补偿情况进行分析与探讨。结果显示:改革后公立医院收入结构逐步趋向合理且稳步增长,药占比控制初见成效,患者均次药品费用下降明显;但仍存在收入结构有待进一步优化,价格补偿不到位且财政补助欠灵活等问题需要完善。厦门市社科学会2016年十个重点调研课题专项基金项

Raman and AFM Characterization of Au and Cu Nanorod and Nanowire Arrays

通过电化学氧化法制备具有不同孔径氧化铝模板 ,利用交流电镀的方法在模板中沉积金属 ,再用酸溶解模板可以得到相应尺度的金属纳米线或纳米棒的阵列 .本文利用原子力显微镜和表面增强拉曼技术分别表征了金和铜两种金属纳米线阵列 .研究结果表明 ,作为探针分子的硫氰(SCN )在金属纳米线上的碳氮三键的振动频率随纳米线直径的增大而蓝移 .这一现象可能是因为尺寸效应对纳米线的费米能级造成影响 ,使不同直径的金属纳米线电子结构存在微小的差别 .Recently metal nanowires (nanorods) have aroused tremendous interest because of their novel properties and potential applications in wide fields [1] . Many two?dimensional nanowire arrays of semiconductors and metals with different diameter and length have been made by using template synthesis method. To characterize the novel optical, electronic and magnetic properties of these materials, UV?Vis and fluorescence spectroscopies are two of the most wildly used methods [2, 3] . Raman spectroscopy has, however, only been applied to the characterizing of semiconductor nanowires and carbon nanotubes [4,5] . Important and meaningful information can be obtained in these cases, as some forbidden Raman modes in the bulk materials become Raman active [4, 5] . Raman spectroscopy is apparently not suitable to study metal nanowires since it can only detect the mechanical vibration bands located in the extremely low frequency region. Consequently, an alternative way has to be established to study the metal nano?wires (?rods) with Raman spectroscopy. In the present work, we have taken the probe molecule strategy and used surface?enhanced Raman spectroscopy (SERS) to characterize metal nanorods (nanowires). It is well known that for a molecule which interacts strongly with a surface, its vibrational band frequency and shape are very sensitive to the electronic property, the chemical environment and the morphology of the surface. Hence Raman spectroscopy has long been used to analyze the atomic structures and the electronic properties of the surface indirectly through assessing carefully the spectral changes of the adsorbate known as a probe molecule. On that account, it is of great interest to diagnose the electronic structures of the metal nanorods with the vibrational spectrum of a probe molecule. We have examined the changes in the electronic properties of the nanorods through analyzing the spectral changes of the probe molecule. For this purpose a typical SERS molecule of SCN - was employed. The nanorod arrays of Au and Cu with different diameter from about 15 nm to 130 nm were fabricated electrochemically by means of the anodic aluminum oxide (AAO) templates. To partially expose metal nanowires with various lengths, the AAO template was chemically etched off to a certain extent by an aqueous solution of phosphoric acid or sodium hydroxide as shown in Fig. 1. After the template was etched off, the nanowires can be characterized by TEM, see Fig. 2. The tapping mode AFM image was obtained on a scanning probe microscope (Nanoscope IIIa). SERS measurements were performed on a confocal microprobe Raman system (LabRam I).作者联系地址：厦门大学固体表面物理化学国家重点实验室!化学系福建厦门361005,厦门大学固体表面物理化学国家重点实验室!化学系福建厦门361005,南京师范大学化学系!江苏南京,210097,厦门大学固体表面物理化学国家重点实验室!化学系福建厦门361005,厦门大学固体表面物理化学国家重点实验室!Author's Address: State Key Lab.for Phys.Chem.of Solid Surf.,Xiamen Univ.,Xiamen 361005, China; 1 Dept. of Chem., Nanjing Norm

Influence of reinforcing bar corrosion on shear behavior of RC beams

制度:新 ; 報告番号:甲2929号 ; 学位の種類:博士(工学) ; 授与年月日:2009/10/15 ; 早大学位記番号:新516

Influence of spatial distribution of bond deterioration insteel bar on shear performance of RC beams

为了分析钢筋黏结退化区段的空间分布对钢筋混凝土(RC)结构承载机制和破坏形态的影响,对10根模拟完全黏结失效的RC梁进行实验研究.从荷载挠度关系; 曲线、箍筋屈服举动、裂缝进展情况以及构件破坏形态出发,利用桁架和拱理论分析了纵向受拉钢筋不同区段的黏结退化及不同锚固形式箍筋的黏结退化对RC梁抗; 剪性能的影响.研究结果表明:纵向受拉钢筋的端部区域黏结失效比跨中区域黏结失效更为危险,破坏模式呈脆性,且承载能力有较大幅度的下降;端部黏结失效导; 致的上述影响在剪跨比较大梁中尤为明显;箍筋形式对梁的最终承载力影响不大,但相对于开口型箍筋,闭合型箍筋对斜裂缝开口进展有更好的限制作用.An experimental investigation was carried out for the effects of spatial; distribution of bond degradation on the shear performance andfailure; mode of reinforced concrete (RC) beams. 10 RC beams specimens were; castand three-point loading tests were carried out. The specimens were; fabricated with spatially bond degradation using artificial method. Test; results indicate that it is more dangerous for RC beams with the bond; deterioration area near the supporting position than in the vicinity of; middle portions; compared with the open-type stirrup, the closed-type; stirrup has a better restriction on the progress of inclined crack; for; specimens with different shear span to effective depth ratio, the; spatial distribution of longitudinal bar bond degradation has different; effects on the shear strength of RC beams.福建省自然科学基金资助项

聚氨酯防腐涂料的改性及其性能研究进展

在众多的材料防腐策略中,简单、有效、性价比高的方法就是通过防腐涂料来进行防护。聚氨酯涂料由于其优异的防腐性能被广泛应用于材料的腐蚀防护。随着应用领域和服役环境日益苛刻,需要对聚氨酯涂料进行改性来进一步提高它的防腐性能。本文根据改性剂的不同对聚氨酯防腐涂料的改性方法进行分类和总结,主要可分为三大类:有机化合物改性、纳米材料改性和复合改性;并重点归纳和评述了其研究现状;最后展望了其未来的发展趋势