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作为全国五大淡水湖之一的巢湖素为世人所关注,特别是其成因及名称来源,更是历代史地学者研究和争鸣的议题."陷巢州长庐州"的传说在江淮民间衍流千年,并进入多种文艺作品和史志典籍,近些年来又频传湖滨湖底发现商陶周皿秦砖汉瓦和古城遗址,"陷巢州"话题再度成为媒体"新闻热点".本文就巢湖名称及"陷巢州"传说作了系统而缜密的考证、疏误与辨正,对搞清巢湖来历,勘核地域文史,都具有较高的学术意义和资料价值. 相似文献
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清代民法为任何一个对法制史有所涉猎的人所熟悉,但人们大都是从清代官方的表达中对它加以了解的.美国学者黄宗智在<清代法律、社会与文化:民法的表达与实践>一书中,从几个方面论证了清代法律制度的实际运作与清代官方表达之间有很大的差异,即实践与表达的背离.这使读者们不得不努力追忆以往所读过的清代官方表达与前人著说,与黄先生的观点做一番对照,以探求历史的真迹. 相似文献
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电影<黄金时代>是美国历史上最优秀的影片之一.它曾荣获第十九届奥斯卡最佳影片、最佳改编剧本、最佳导演、最佳男主角、最佳男配角、最佳剪辑、最佳音乐、特别奖等八项大奖.该片由美国高德温影业公司于1946年发行,雷德.马奇、达纳.安德鲁斯和哈罗特.拉塞主演,威廉·惠勒执导.威廉·惠勒是美国早期大导演,曾三次荣获奥斯卡最佳导演奖,其作品有<忠勇之家>、<宾虚>、<罗马假日>、<咆哮山庄>等名片. 相似文献
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赵学勉 《中学语文园地(初中版)》2008,(4):7-8
<鸿门宴>在塑造人物形象方面所采用的一个相当高明的方法,那就是通过对比、映衬、烘托的手法来表现人物性格.除了人物之间,比如,主帅与主帅,谋士与谋士,大将与大将,内奸与内奸的对比、映衬外,在主帅与谋士的关系上也形成鲜明的对比.同是很重要的谋士,在足智多谋、睿智机敏方面,范增和张良难分伯仲,甚至范增更显得老奸巨猾.但为什么项羽与范增配合不好,而刘邦与张良却配合得天衣无缝?要回答这个问题,应从每组人各自的身份、地位、性格和谋划的方式几方面来考虑.…… 相似文献
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近现代群育观念的复兴及其启示 总被引：1，自引：0，他引：1
近代以降,严复、梁启超等人"群"观念的提出,旨在唤起国人的"合群"意识,以达到保国保种的目的.孙中山、蔡元培等人的教育主张奠定了民国时期群育列入教育方针的基础,梅贻琦、罗輈重、潘光旦等人的教育主张丰富了群育思想.当前,德育含义太泛,实际上是弱化了德育,如何在新的时代背景下,将中国传统观念中的"群"和中国近代提出的群育思想继承发扬,值得反思. 相似文献
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刘奕云 《咸阳师范学院学报》2008,23(1):43-45
春秋时期,宋、齐、楚鹿上会盟之地望,历有鹿城、鹿邑、阜南、太和四说.本文通过近年平舆县新发现汉汝南郡封泥"原蔍侯相"、"原蔍长印",及阜南县阮城出土的楚玺"专室之玺"等文物,结合历史文献,认为春秋"鹿上"本名为"蔍上",东汉置原蔍县、侯国,其地在今阜南县阮城. 相似文献
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新时期大学辅导员工作之我见 总被引：1，自引：0，他引：1
新的历史时期,高校学生辅导员工作面临的形势和任务发生了深刻变化.辅导员工作要顺应时代的发展、形势的变化,做到与时俱进,应着力解决四个方面的问题:更新观念,掌握本领,当好朋友,作好表率,只有这样才能切实担负起教书育人的伟大使命. 相似文献
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舒畅 《安阳师范学院学报》2005,(4):150-151
音乐作为人类文化的一个种类,必然与文化的各个方面紧密联系.各民族的音乐是在自然环境、社会环境、宗教、语言的关联中得以产生和发展的. 相似文献
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Particle image velocimetry （PIV） experimental results of wake flow structure of a NACA0012 airfoil with small attack angle mounted above water surface are introduced.The experiment was carried out in a small-scale wind-wave tunnel.The diameter of wind-wave tunnel test section is 1.7 m （long） × 0.4 m （width） × 0.4 m （height）.The flow fields around the airfoil were measured under four diffierent conditions by varying the distance between the airfoil and the water surface.The attack angle of the airfoil was kept 10- during the experiment.For each experimental condition,the time series of particle images was captured to calculate continuous evolution of the velocity fields.The velocity fields were ensemble averaged to get the statistic parameters such as mean velocity and vorticity.Typical instantaneous velocity fields for each case are introduced to show the basic flow structure of wind surface flow separation.The aerodynamic loads acting on the airfoil are analyzed qualitatively according to the mean vorticity distribution in the flow field based on the theory of vorticity aerodynamics.The results indicate that the flow structures and drag/lift force of the airfoil alter remarkably with the changing distance between the airfoil and water surface. 相似文献
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Amorphous InGaZnO (a-IGZO) film is deposited on the glass substrate by radio-frequency sputtering and the influence of annealing
on wet etch of a-IGZO films were investigated. The results show that etch rate of IGZO films decrease with the increase of
annealing temperature. Etching taper angle is less than 60° and critical dimension (CD) loss is less than 1 μm in over-etching
time of 30 s. The fact implies that IGZO films etching with oxalic acid may be a good wet etching way for the thin-film transistor
(TFT) array process. 相似文献
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MBE growth of ZnSxSe1−x thin films on ITO coated glass substrates were carried out using ZnS and Se sources with the substrate temperature ranging
from 270°C to 330°C. The XRD σ/2σ spectra resulted from these films indicated that the as-grown polycrystalline ZnSxSe1−x thin films had a preferred orientation along the (111) planes. The evaluated crystal sizes as deduced from the FWHM of the
XRD layer peaks showed strong growth temperature dependence, with the optimized temperature being about 290 °C. Both AFM and
TEM measurements of these thin films also indicated a similar growth temperature dependence. High quality ZnSxSe1−x thin film grown at the optimized temperature had the smoothest surface with lowest RMS value of 1.2 nm and TEM cross-sectional
micrograph showing a well defined columnar structure.
Project supported by the National Science Council of PRC (No. 59910161981) and RGC grant from the Hong Kong Government under
Grant (No. NS-FC/HKUST 35) 相似文献
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Amorphous InGaZnO (a-IGZO) film is deposited on the glass substrate by radio-frequency sputtering and the influence of annealing on wet etch of a-IGZO films were investigated.The results show that etch rate of IGZO films decrease with the increase of annealing temperature.Etching taper angle is less than 60 and critical dimension (CD) loss is less than 1 μm in over-etching time of 30 s.The fact implies that IGZO films etching with oxalic acid may be a good wet etching way for the thin-film transistor (TFT) ... 相似文献
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In this work, the charge dynamics characteristics of injection, transport and decay in porous and non-porous polytetrafluoroethylene (PTFE) film electrets were investigated by means of corona charging, isothermal and thermal stimulating surface-potential decay measurements. The results showed that the initial surface potential, whether positively or negatively charging, is much higher in non-porous PTFE than in porous PTFE. For porous film the value of initial surface potentials increases with increase of film thickness. Higher charging temperature can remarkably improve charge stability. The charge dynamics are correlated to materials microstructure according to their scanning electron micrographs.For non-porous PTFE films, polarizability change of C-F bonds is the main origin of electret charges; but for porous PTFE film a large number of bulk and interface type traps are expected because of the greater area of interface and higher crystallinity. 相似文献
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INTRODUCTION Monocrystalline SBN (Strontium barium nio-bium, SrxBa1?xNb2O6, denoted SBNx?100, where 0.25≤x≤0.75) solid solution, is currently being inves-tigated as potential material for many micro-device applications, such as piezoelectric infrared detectors, piezoelectric, electro-optic modulators, and holo-graphic storage (Koch et al., 1998), because SBN has one of the largest known linear electro-optic coeffi-cients (r33=1300 pm/V for SBN75), two orders of magnitude larger th… 相似文献
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A type of azobenzene-containing block copolymer polymethyl methacrylate-b-poly (n-butylmethacrylate-co-6-(4-(phenylazo) benzoate) hexyl methacrylate) (PMMA-b-(PnBMA-co-PAzoMA)) was synthesized by the atom transfer radical polymerization (ATRP). Macroinitiator polymethyl methacrylate (PMMA) was prepared by ATRP and used to initiate the copolymerization of monomer n-butyl methacrylate (nBMA) and azobenzene-based methacrylate monomer (AzoMA). Herein, three block copolymers with different molecular weights and block volume fractions were obtained and spin-coated on a silicon substrate or quartz plate before annealing at 180 °C for 14 h. The surface morphologies in these annealed copolymer films were observed by atomic force microscopy (AFM). Bicontinuous stripe or island patterns with different sizes were formed dependent on the film thickness. These ordered patterns are considered to be formed arising from the dewetting process of the surface layer in the copolymer film. Photoisomerization of azobenzene units in the copolymer films changed the dewetting behaviors of the surface layer of the thin film. Therefore, some copolymer annealed films showed a reversible morphology conversion between bicontinuous stripe and island structure when exposed to UV light and upon being stored in the dark. It was found that the composition of the block copolymer had obvious influences on the photoinduced morphology conversion behaviors in these copolymer thin films. When the volumes of PnBMA and PAzoMA phases in the block copolymer were large enough, the surface morphology could be modulated by UV light irradiation and storage in the dark. This work proposes a new possibility for photoinduced control and design of the dewetting processes of thin films using a linear block copolymer. 相似文献
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张殿龙 《雁北师范学院学报》2008,24(6)
以烯丙醇聚醚与七甲基三硅氧烷为原料,用氯铂酸作催化剂,成功合成三硅氧烷聚醚改性表面活性剂．用红外光谱对其结构进行了表征,并测试其表面活性与流变性能．结果表明,三硅氧烷聚醚改性物的CMC（临界胶束浓度）为84．0mg／L,此时表面张力为20．9mN／m． 相似文献
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INTRODUCTION Polytetrafluoroethylene (PTFE) is one of themost important high insulating organic polymerelectret material which have been applied in manyfields such as sensors, generators and motors,dose-meters, and air filters at high temperature,biofunctional materials etc., especially since theexcellent charge storage stability and highquasi-static and dynamic piezoelectric coefficientsin porous PTFE film are reported (Xia et al., 1999;Schw?diauer et al.… 相似文献
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Aluminum nitride （AlN） thin films with high c-axis orientation have been prepared on a glass substrate with an Al bottom electrode by radio frequency （RF） reactive magnetron sputtering. Based on the analysis of Berg＇s hysteresis model, the improved sputtering system is realized without a hysteresis effect. A new control method for rapidly depositing highly c-axis oriented AlN thin films is proposed. The N2 concentration could be controlled by observing the changes in cathode voltage, to realize the optimum processing condition where the target could be fixed stably in the transition region, and both stoichiometric film composition and a high deposition rate could be obtained. Under a 500 W RF power of a target with a 6 cm diameter, a substrate temperature of 450 ℃, a target-substrate distance of 60 mm and a N2 concentration of 25%, AlN thin film with preferential （002） orientation was deposited at 2.3 μm/h which is a much higher rate than previously achieved. Through X-ray diffraction （XRD） analysis, the full width at half maximum （FWHM） of AlN （002） was shown to be about 0.28°, which shows the good crystallinity and crystal orientation of AlN thin film. With other parameters held constant, any increase or decrease in N2 concentration results in an increase in the FWHM of AlN. 相似文献