Studies of The Preface to the Collection of Huajian School since the 20th century

有词以来的第一篇词论《花间集序》已逐渐成为学者关注的热点,并于新世纪引发了一场争论。20世纪以来对《花间集序》的研究大致可以分为三个时期:20世纪90年代前的沉寂期、90年代至2000年的酝酿期以及新世纪以来的争鸣期。在未来研究中,可立足于欧阳炯、赵崇祚的生平考证以及《花间集序》版本流传、文字训诂等方面作进一步深入研究。As the first ci-poem,The Preface to the Collection of Huajian School gradually becomes a hotspot of scholars and initiates a debate in the new century.Since the 20th century,the study of The Preface to the Collection of Huajian School can be divided into three stages: the depressed period before 1990,the ferment period in 1990s,and the contention period since the new century.In the future research,we can base on Ouyang Jiong′s and Zhao Chongzuo′s biographical verification,the spreading of the Preface′s various editions and commentary content for further study

论行政资源功能与持续性的实现

行政资源是行政系统生存、发展的基础。本文着重研究行政资源的功能和持续性的实现。文章分析了行政资源的三个功能，并从结构性、现实性两个角度分析行政资源持续性的实

同轴旋转圆台环隙流动机制及实验研究

同轴旋转圆台环隙内流体的流动是基于经典的两同轴旋转圆柱环隙内泰勒库特流的一种扩展研究。通过流动显示实验和PIV粒子图像测速技术对圆台环隙的内部流场进行可视化和定量化的研究,分析涡运动的周期性规律,探究圆台环隙内雷诺应力分布和水位高度对流场的影响。研究表明,随着时间的发展,涡列周期性明显且整体在下移,当脉冲数为100脉冲/s时,环隙内形成均匀分布的正反交替的涡;当脉冲数为200~500脉冲/s时,存在快慢交替的分裂周期;在3种水位高度下也都存在明显周期性分裂,只是周期时间和涡的个数不同;平均流场存在上凸型外向流和下凹型内向流2种流态,流态的差异是离心力与静压力双重作用的强弱变化所致;雷诺应力分布中,径向正应力占主导,并主要集中在环隙中部。国家自然科学基金(11072206);;福建省自然科学基金(2012J01023)~

鲁米诺电致化学发光机理的研究

The electrochemiluminescence (ECL) of the luminol in aqueous alkaline solu tion has been studied using cyclic voltammetry, potential step tecdrique and time resolved UV/Vis spectroscopy. The results of the electrochemical experimens showed that the ECL of the luminol can carry out in the potential region of oxygen adsorption also and lead us suggest a new light-endtting pathway for the bonol on which the reaction between some of the luminol radical Anons and the adsorbed superokide radical sndtaneously gener ated in the anodic oxidation process yields excited 3-drinophthalate, the light emitting species. The results of the time resolved spectroscopic experiments manifested that the formation of the polymeric film produced by the luminol radical anions is one of important faetors decreasing the ECL of the luminol

ECAP制备纯Cu的热处理工艺与力学性能

Cu经过等径角挤压(ECAP)变形后,屈服强度达到了约400 MPa,然而加工硬化能力不足导致其在小应变阶段就开始颈缩(≤2%) 。研究发现,可以通过部分再结晶退火调控变形Cu的室温准静态拉伸性能。在275 ℃退火10 min后,其准静态拉伸强度和塑性得到了良好的匹配:在保持屈服强度为330 MPa的前提下,均匀伸长率达5%

Experimental Investigation with PIV on Characteristics of Shedding Vortices in Wake of Flapping Wings

通过色流实验和粒子成像测速技术（particle image velocimetry,PIV）对扑翼近场尾流脱落涡的结构轨迹和能量进行了定性及定量研究.结果表明：因展向流动充分性的不同,存在两种牛角型涡系结构;上下扑时翅翼交替产生顺时针和逆时针脱落涡,两涡运动轨迹呈近似弧形对称,对称轴的仰角略大于攻角;脱落涡的涡心涡量在上下扑极点达到最大值,环量最大值出现在到达极点前的1/5~2/5周期之间;产生脱落涡的半周期内,涡的平均环量都随减缩频率的增大而增大,减缩频率较低时,下扑平均环量大于上扑平均环量,减缩频率较高时则相反;振幅对涡能量影响明显,减缩频率为2~2.5时,振幅±40°时的涡平均环量约是振幅±30°时的两倍,减缩频率越大振幅影响越明显.Qualitative and quantitative studies on the vortices structure, motion path and energy in the near-f ield wake of flapping wings were conducted through dye-flow tests and particle image velocimetry （ PIV） in tank. Results indicate that two kinds of horn-shaped vortices structures exist during f lapping under insuf f icient or suf iicient spanwise flow. Ant iclock-wise and clockwise vortices arise alternately during downward and upward flapping, whose traces are approximately symmet-rical. The elevation angle of symmetry-axis is slight ly larger than the attack angle of flapping wings. The vort icity of vortex core reaches its maximum at the top or bottom point, while the maximum circulat ion occurs at 1/5 ~ 2/5 period before the top or bottom point. The average circulations of both vortices during half period of producing them ascend with the increase of reduced frequency. At small reduced frequency, the average circulat ion during downward f lapping is larger than that dur-ing upward flapping. Contrary result is observed in case of large reduced frequency. Flapping amplitude signif icant ly inf lu-ence the vortex intensities, e.g. when reduced frequency is 2-2.5, the average circulat ion of vortices with an amplitude of ±40° is about twice that of amplitude of ±30°,and the influence grows with the increase of reduced frequency

虚拟现实技术在制造业中的应用

本文简要介绍虚拟现实技术和虚拟制造技术的发展、概念和应用;提出我国虚拟现实技术和虚拟制造技术的主要研究方向和应用重点;结合实际情况,展望福建省虚拟现实技术和虚拟制造技术的发展前景

掺铁碳化硅陶瓷的制备及其吸波性能

将羰基铁和液态聚碳硅烷(LPCS)反应生成的铁(Fe)溶胶与固态聚碳硅烷(PCS)混合,合成出不同Fe质量分数的PCS先驱体,然后经氧化交联和高温热解制备了不同Fe质量分数的磁性碳化硅陶瓷(Fe/SiC),系统地研究了Fe元素的引入对SiC陶瓷的组成、结构、磁性能和介电性能的影响规律。研究发现,当Fe质量分数小于8.94%时,在热解过程中,Fe元素可以显著促进SiCxOy的分解,生成β-SiC,且随着Fe质量分数的增加,β-SiC的结晶峰越来越强;但随着Fe质量分数继续增加,达11.78%时,则主要生成Fe3Si;Fe/Si C陶瓷均呈铁磁性,其饱和磁化强度随着Fe质量分数的增加而呈指数形式增加;当Fe质量分数为4.19%时Fe/SiC陶瓷在12.4 GHz具有最小的反射损耗,为-9.4 dB,同时低于-5 dB的带宽为2.4 GHz,Fe质量分数为8.94%时,低于-5 dB的带宽则为3.7 GHz,可用作良好的微波吸收材料。国家自然科学基金(51603175);;中央高校基本科研业务费(20720150082)资助项目~

The Influence of Magnesium Concentration for the Survival Rate of Bufo melanostictus Tadpoles in the Acidity Water and Alkaline Water

[目的]研究野外黑眶蟾蜍(Bufo melanostictus)蝌蚪的生存状况。[方法]研究分别在碱性水(p H 7.5~8.0)以及酸性水(p H 5.5~6.0)2种模拟环境条件下,通过急性毒性试验方法以不同的浓度梯度Mg~(2+)对黑眶蟾蜍蝌蚪进行24和48 h的胁迫试验。[结果]在相同浓度梯度和相同观察时间下,黑眶蟾蜍蝌蚪在碱性水中的存活率低于酸性水;不同p H的水环境与Mg~(2+)的协同作用显著影响黑眶蟾蜍蝌蚪的48 h存活率(F7,32=3.373,P<0.05);黑眶蟾蜍蝌蚪在酸性水环境下适宜生存的Mg~(2+)浓度范围为1 418.41~1 590.54 mg/L,半致死浓度(LC_(50))为2 357.32 mg/L,安全浓度为521.51 mg/L;在碱性水环境下适宜生存的Mg~(2+)浓度范围为1 264.91~1 418.41 mg/L,LC_(50)为1 879.81 mg/L,安全浓度为533.99 mg/L。[结论]该研究可为今后黑眶蟾蜍的保护提供理论依据。[Objective]The aim was to study the survival status of Bufo melanostictus tadpoles in the field.[Method]The regular acute toxicity test was carried out that Bufo melanostictus tadpoles were breed in the alkaline water( p H 7.5-8.0) and acidity water( p H 5.5-6.0)with different Mg~(2+) concentration gradient for 24 and 48 h.[Result]The results showed that the survival rate of Bufo melanostictus tadpoles in the alkaline water was lower than the acidity water in the same condition.Synergistic effects of different p H and Mg~(2+) concentration had a significant effect on the survival rate of Bufo melanostictus tadpoles in the 48 h toxicity experiment( F7,32= 3.373,P < 0.05).In the acidity water environment,48 h toxicity experiment results showed that the optimal Mg~(2+) concentration was 1 418.41-1 590.54 mg / L,the median lethal concentration( LC_(50)) was 2 357.32 mg/L and the safe concentration was 521.51 mg/L.By contract,these three indexes in the alkaline water environment were 1 264.91-1 418.41,1 879.81 and 533.99 mg / L,respectively.[Conclusion] The study can provide theoretical basis for protection of Bufo melanostictus.国家自然科学基金项目(31271124);; 广东省自然科学基金项目(s2013010016062

Preparation and in vitro evaluation of chitosan microspheres containing matrine

目的:以壳聚糖为囊材制备苦参碱结肠靶向给药微球及评价其体外释药情况。方法:用乳化化学交联法制备微球,以微球的粒径分布百分数、载药量及包封率为优化指标对影响微球制备的主要因素用正交试验设计优化制备条件;并对最佳制备工艺制得的微球进行3种不同递质(人工胃液、人工肠液及大鼠结肠液)中的体外释放度评价。结果:制得的苦参碱壳聚糖微球在电镜下,球形表面圆整,粒径分布适宜,微球平均粒径为(68.3±2.7)μm,平均载药量为(16.0±0.5)%,平均包封率为(66.3±4.2)%。苦参碱壳聚糖微球在人工胃液中2h不释药;在人工肠液中4h内释放不到1%,96h释药不到10%;在含大鼠结肠内容物的磷酸盐缓冲液(pH6.8)中4h释放10%左右,36h释药近50%,此后释药趋于缓慢,96h释药近80%。结论:苦参碱壳聚糖微球几乎不在上消化道释药,而是在结肠靶向释药。OBJECTIVE To preparate the chitosan microspheres containing matrine for the colon-specific drug delivery and evaluate its release in vitro.METHODS The chitosan microspheres containing matrine were prepared by emulsion-chemical crosslink technique.The better preparation procedure with respect to particles size distribution,embedding rate and drug loading were optimized by the orthogonal experimental design.In-vitro drug release were carried out in the artificial gastric,artificial intestinal and the phosphate buffered saline(pH(6.8)) containing rat colon contents.RESULTS The chitosan microspheres containing matrine was shown to have good spherical geometry,a smooth surface and suitable size distribution under scanning electron micrographs.Average diameter of microspheres was((68.3)±(2.7))μm,drug loading was((16.0)±(0.5))%,embedding rate ((66.3)±(4.2))%.Little release and a little release of matrine from the microspheres were observed in the artificial gastric juice and in the artificial intestinal juice,respectively.However,the release of matrine was markedly increased in the phosphate buffered saline(pH(6.8)) containing rat colon contents,which was near to 10%,50% and 80% at 4 h,36 h and 96 h,respectively.CONCLUSION These findings suggest that the chitosan microspheres containing matrine may be useful a dosage form for colon-specific drug delivery.甘肃省自然科学基金(编号ZS0001-A23-073-Y