“童年阴影”诗学的跨媒介生成研究

“童年阴影”动画片具有另类、猎奇的审美特点,在形象、配乐和故事层面引发儿童观众的恐惧。80后、90后观众时隔多年,把这些作品从电视荧屏分享到弹幕视频网站,并以网络青年亚文化的反叛态度、解构语言对童年视觉经验进行重构,消解童年恐惧,青年的现实生存焦虑得到短暂缓释。在这一过程中,“童年阴影”诗学的丰富内涵得以生成。从视觉污染角度看,一些“童年阴影”动画片的视听形式,由于不符合儿童审美心理和认知水平,造成负面身心困扰。避免儿童动画片视觉污染的产生,既需要发挥生产、传播、监管等环节的作用,也需要观众培养一双明澈而有教养的眼睛。

身体的崇高与悲壮——胡悌麟、贾涤非现实主义油画《杨靖宇将军》的情感动员

胡悌麟、贾涤非于1984年合作的油画《杨靖宇将军》在改革开放初期东北油画发展进程中具有划时代的意义。作品融合了胡悌麟高度站位的主题性创作思想和贾涤非情绪外放的现代派造型表现力度,传递出悲壮、崇高的情感震撼力,并且在写实主义主导的东北主题性油画创作传统中开拓了语言形式的新局面,为此后具有鲜明表现性特质的东北地域美术风格的确立开启了前奏。文章结合抗联史料、创作者回忆与过程草图,通过对胡悌麟、贾涤非二人创作《杨靖宇将军》的过程进行回顾,旨在揭示作品悲壮、崇高的艺术表现力是如何逐步推敲、实现的。

命运、艺术情境及时代身份的潜在与显现——贾涤非壁画《松江万古流》图像考

1990年起,油画家贾涤非在吉林省内受邀参与创作了多件公共壁画。其中,因历史原因时隔多年对《松江万古流》进行了重绘,曲折的经历和作品本身的艺术高度使该主题成为中国当代壁画领域的独特研究样本。文章依循图像志——图像解释学路径,借助贾涤非多年来油画创作主线与壁画创作支线的呼应关系,寻找两幅《松江万古流》在其不同创作阶段的标志性意义,并试图进一步探究二者图像差异背后贾涤非潜在的创作思考演化。

Single-atom Fe with Fe_(1)N_(3) structure showing superior performances for both hydrogenation and transfer hydrogenation of nitrobenzene

The design of non-noble metal heterogeneous catalyst with superior performance for selective hydrogenation or transfer hydrogenation of nitroarenes to amines is significant but challenging.Herein,a single-atom Fe supported by nitrogen-doped carbon(Fe_(1)/N-C)catalyst is reported.The Fe_(1)/N-C sample shows superior performances for the selective hydrogenation and transfer hydrogenation of nitrobenzene to aniline at different temperatures.Density functional theory(DFT)calculations show that the superior catalytic activity for the selective hydrogenation at lower temperatures could be attributed to the effective activation of the reactant and intermediates by the Fe_(1)/N-C.Moreover,the excellent performance of Fe_(1)/N-C for the selective transfer hydrogenation could be attributed to that the reaction energy barrier for dehydrogenation of isopropanol can be overcome by elevated temperatures.

Coordination structure dominated performance of single-atomic Pt catalyst for anti-Markovnikov hydroboration of alkenes

The rational design of efficient single-atomic(SA)catalysts is essential and highly desirable but impeded by the lack of sufficient acknowledge between structure and property.To this end,it is critical to clarify the effect of the coordination structure of active metal centers on the catalytic activities for the design of such catalysts.Here,we report that different coordination structures of SA Pt catalysts can dramatically influence their activities for anti-Markovnikov hydroboration of alkenes.Compared with the other two coordination structures(Pt-N4 and Pt-O2),the SA Pt species coordinated with three O atoms(Pt-O3)display the highest turnover number value of 3288 for the hydroboration reaction to access the important alkylboronic esters.Density functional theory calculations reveal that a superior catalytic activity can be expected for alkene hydroboration over the three O coordinated Pt species due to the lowest reaction energy(ΔG)limiting step from the reaction phase diagram.

Recycling synthesis of single-atom Zn-nitrogen-carbon catalyst for electrocatalytic reduction of O_(2)to H_(2)O_(2)

Portable electrochemical synthesis of H_(2)O_(2),which is widely used for disinfection,sterilization,and waste treatment,has attracted increasing attention.However,low atomic utilization efficiency and by-product disposal during the synthesis of electrocatalysts are inevitable.Based on the advantages of single-atom catalysts(SACs)towards H_(2)O_(2)synthesis via a 2e−transfer oxygen reduction reaction,this work presents the synthesis of ZnNC SACs as excellent oxygen reduction catalysts with high atomic use efficiency and almost no generated waste by using formamide and metal powder as precursors.The ZnNC SACs exhibit H_(2)O_(2)selectivity exceeding 80%when working continuously for 10,000 s.The synthetic strategy described in this paper is intended to be used as a supplement to the synthesis of metal-nitrogen-carbon SACs with high atomic utilization efficiency and low waste generation for environmental and chemical applications.

国内网群事件传播峰值特性研究 以两类典型事件为例

网络群体性事件是近年随互联网在社会生活中渗透而逐渐出现的,是网络舆情具体体现。百度指数则是一个反映网群事件传播热度趋势的在线工具。本研究依靠百度指数中对网群事件的传播分析,以峰值为切入点,探寻其背后的传播过程,进而分析峰值特性,主要体现在传播平台、形式及信息流动方向三个领域。最后,研究将对当今网络舆情的管理控制提出几点总结性的建议。