论巴洛克绘画的光影变化

不同于文艺复兴时期绘画中光线均衡地洒在每个人物身上,巴洛克绘画是用光线控制着画面,并使光线飘动在画幅的各处,形成各种光斑的组合,产生了动态式的光影模式。主要呈现出四种基本类型:第一种,动态激荡的交错、超自然的光线热情而奔放,以鲁本斯为代表;第二种是现实世界多变的光影类型,以委拉斯贵兹、伦勃朗、荷兰画派为代表;第三种类型是古典趣味的动态式光影方式,以普桑等为代表;第四种类型是以拉图尔为代表的神奇的烛光模式。这四种光影类型构成了丰富多彩的巴洛克绘画的光影模式,对于巴洛克艺术的动态感、戏剧感和视错效果起到了重要作用,对后世影响巨大。     

轻稀土—茜素红S络合物极谱吸附波的研究

本文报道了轻稀土(La、Ce、Pr、Nd)——茜素红S络合物极谱吸附波。在含有1.0×10~(-5)mol/L茜素红S.0.075 mol/L磺基水杨酸钠的三乙醇胺-盐酸缓冲溶液(pH7.9)中,在JP-2型示波极谱上可获得灵敏的轻稀土络合物单扫极谱吸附波,峰电位为—0.80V(VS.SCE)。用二次导数档可测定9.0×10~(-9)-1.0×10~(-6)Mol/L的轻稀土。本文对极谱吸附波的性质和电极反应的机理进行了探讨。在汞电极上用拟单纯形法和连续变化法测定了诱导吸附型体的组成为LaL_2(L_2)_(ads).并测定了稀土球墨铸铁中轻稀土的含量。     

基于激光散透比的牛乳脂肪测试技术研究

依据光散射原理,建立了利用散透比测量牛乳脂肪质量含量的理论模型,提出了牛乳脂肪质量含量的快速高准确度测量方法。实验结果表明,本方法能准确、快速的测量牛乳脂肪质量含量。     

Application of C5—C13 light hydrocarbons in depositional environment diagnosis

Based on the geological background and Gammacerane/C31H（S ＋ R） ratios, source rock depositional environments of the studied oil samples （194） from 13 oilfields were classified into three groups according to salinity： saline-lacustrine facies, fresh to brackish lacustrine facies （including limnetic facies）, and semi-saline to saline facies （including marine facies of the Tarim Basin）. C5-C13 compound groups in the crude oils were separated by GC, and about 286 compounds were qualitatively analyzed. The geochemical application of the C6- C13 compound groups and their ratios between each group with individual carbon number was investigated. Our studies show that （1） C6-C13 compound groups and their ratios in the crude oils could serve as new reliable parameters for oil-oil correlation because the C6- C13 light fractions are the major oil component, especially in light oil or condensate, in which they account for almost 90% of the whole oil; （2） the compound groups of C7 light hydrocarbons in oils derived from different depositional environments with different salinity have different characteristics; （3） C6-C13 compound groups and ratios may be affected by other factors such as maturity, but they are mainly controlled by salinity of depositional waters.     

BCP增透膜对顶发射器件发光性能的影响

制作了基于有机材料2,9-二甲基-4,7-二苯基-9,10-菲咯啉(BCP)作增透膜的硅基顶发射有机电致发光器件,探讨了BCP增透膜对于器件亮度、效率等光学参数的改善以及对于器件光谱的影响,并结合微腔理论和转移矩阵理论进行了计算,验证了理论与实验结果的一致性.     

半空心自冲铆接工艺在车身轻量化中的应用

介绍了自冲铆接技术的概念、类型、工艺原理以及在汽车车身制造中的应用,对自冲铆接和点焊的工艺连接做了比较,指出了自冲铆接技术的应用前景.     

Boosting charge collection efficiency via large-area free-standing Ag/ZnO core-shell nanowire array electrodes

Hybrid nanostructures, comprising of a metal core and a semiconductor shell layer, show great potential for a new generation of low-cost solar cells due to their unique electronic and optical properties. However, experimental results have fallen far short of the ultra-high efficiency(i.e. beyond Shockley-Queisser limit) predicted by theoretical simulations. This limits the commercial application of these materials. Here, a non-transparent organic solar cell with an array of Ag/ZnO nanowires has been experimentally fabricated to increase the internal quantum efficiency(IQE) by a factor of 2.5 compared to a planar counterpart. This result indicates a significant enhancement of charge collection efficiency due to the ultrafast Ag nanowire channels. This hybrid nanostructure can also serve as a perfect back reflector for semi-transparent solar cells, which can result in enhanced light absorption by a factor of 1.8 compared to the reference samples. The enhanced charge collection and light absorption can make these Ag/ZnO nanostructures available for the application of modern optoelectronic devices.     

环境中的光污染及其危害

光污染是现代社会经济发展、科学技术进步伴随产生的环境问题。光污染现象在许多大城市里部已经出现了。光污染已经影响到人们的正常生活,在不同程度上对人们的身体造成伤害。目前,专家们对于环境中的光污染,已经做了许多研究,发表了许多文章,写了许多书。但是政府和公众对光污染危害的认识还十分不足,光污染的防护治理工作还没有引起人们的足够重视。建立光污染防护和治理的法律法规,制定光污染防护和治理措施,开展光污染的防护和治理工作,势在必行。此外,本文指出目前文献中光污染定义的缺陷,提出光污染的新定义。特别提出相机拍照闪光次数过多,对人体健康的危害及防护问题。     

类星体3C 273 X射线波段周期特性分析

收集了Ariel V ssI、GINGA、EXOSAT及RXTEX卫星在X射线波段（2-10keV）的观测数据点1059个,获得了类星体3C273从1976年至2008年的历史光变曲线。利用Jurkevich方法及DCF方法计算并分析了类星体3C273的光变周期,结果表明,3C273在X射线波段的光变周期为14.45±0.15年。此外,针对这一光变周期结果,用双黑洞模型对其中心黑洞质量进行了估算和讨论。     

不同密度板栗林分产量分化机理

通过对江苏省宜兴市茗岭乡４种不同密度的（４ｍ×３ｍ、３ｍ×２．５ｍ、３ｍ×２ｍ、２ｍ×１．５ｍ）８年生板栗密植园树体生长发育、光能分布规律、光合生产能力、栗实产量和品质特征的系统分析,研究了板栗密植园的产量分化机理。结果表明：栽植密度显著影响板栗树冠内的光能分布和利用水平,制约树冠叶群的光合生产能力,从而进一步影响树体生长发育状况,最终表现出栗实产量的差异。但栽植密度对栗实品质无显著的影响。