摘要：Transformation thermodynamics as a major extension of transformation optics has recently received considerable attention. In this paper, we present two-dimeusional （2D） and three-dimensional （3D） diamond-shaped transient thermal cloaks with non-singular homogeneous material parameters. The absence of singularity in the parameters results from the fact that the linear coordinate transformation is performed by expanding a line segment rather than a point into a region, while the mechanism behind the homogeneity is the homogeneous stretching and compression along orthogonal directions during the transformation. Although the derived parameters remain anisotropic, we further show that this can be circumvented by considering a layered structure composed of only four types of isotropic materials based on the effective medium theory. Numerical simulation results confirm the good performance of the proposed cloaks.

摘要：A coordination polymer{[Cd(H_(2)dpa)(bpy)]·3H_(2)O}_(n)(Cd-CP)was designed and hydrothermal synthesized based on 4-(2,4-dicarboxyphenoxy)phthalic acid(H_(4)dpa),2,2'-bipyridine(bpy)and Cd(NO_(3))_(2)·4H_(2)*** structure was characterized by single-crystal X-ray diffraction,powder X-ray diffraction,elemental analysis,and infrared ***-CP belongs to the monoclinic crystal system with the P2_1/c space group and performs in a 1D double-chain *** adjacent double chains further form a 3D supramolecular network structure through hydrogen *** analysis shows that Cd-CP has good thermal *** analysis showed that Cd-CP had good choosing selectively and was sensitive to metal ions(Fe^(3+)and Zn^(2+)),2,4,6-trinitrophenylhydrazine(TRI),and pyrimethanil(Pth).Interestingly,when Cd-CP was used for fluorescence detection of metal ions,it was found to have a fluorescence quenching effect on Fe^(3+)but had an obvious enhancement effect on Zn^(2+).Therefore,we designed an“on-off-on”logic *** addition,the mechanism of fluorescence sensing has been deeply ***:2258625.

摘要：我国民间城市形象片的崛起,是近年来具有鲜明时代特征的文艺创作现象。就叙事主题意涵而言,民间城市形象片表现出创作者对网感化叙事、想象力叙事与陌生化叙事的大胆追求,以充满创意的赛博朋克之城、动画卡通之城、数字游戏之城共同描绘出具有后现代特征的城市图景。就视听创意手段而言,以鸟瞰视角为代表的城市视觉疆域的变形延展,以速度仪式为核心的城市视觉节奏的持续提升,以及以音响修辞为主旨的城市听觉形态的独特表达,建构起当代城市影像全新的视听体验、审美感知与价值认同。就传播形态特征而言,民间城市形象片在传者与受众、共性与个性、真实与虚拟、生产与消费等多元维度出现边界消融,城市影像成为人与网络媒介共生建构的产物,表现出诸多社交性媒介话语特征。

摘要：人工智能(AI)作为新一轮科技革命的核心驱动力,正在深刻重塑各个产业的面貌。特别是生成式AI的迅猛发展,为创意产业工作者带来了前所未有的变革。基于任务技术匹配理论和AI二重性,本文探究了人智协同对不同层次创作者的差异化作用及其内在机制,旨在从微观视角剖析贯穿历次科技革命的工作极化现象是否以及如何在本轮技术革命的创意产业中重演。通过混合方法质化研究、网络数据研究和情景实验研究,本文发现,人智协同可以通过创意新颖性和创作生产率提升创作绩效;高层次创作者在创意新颖性上提升更大,低层次创作者则在创作生产率上受益更多;相较于中层创作者,人智协同对高、低层次创作者的绩效提升更为显著,即个体层存在极化现象。本文不仅揭示了AI对创意产业工作者的极化影响,丰富了工作极化现象的微观过程研究,拓展了任务技术匹配理论在AI技术场景中的适用性,还为创意产业工作者如何适应新质生产力的发展提供了理论指导,为开发更符合不同层次创作者需求的AI应用提供了思路。

摘要：帝王狩猎图银盘作为萨珊王朝宫廷仪式的奢侈器具和帝国外交的政策工具,承载着帝国的艺术审美风尚、历史文化传统、宗教信仰习俗和君权神授观念等。本文从美术考古学角度出发,依据图像学分析以及图像与文本的互涉来探究帝王狩猎图银盘的制作意图和社会背景;通过梳理银盘图像的构成和缘起发展,对图像的设计表象和象征隐喻展开分析,进而从帝王故事、宗教权力和外交贸易的多元角度解读帝王狩猎图银盘在构建和传播萨珊帝国形象的强大与荣耀以及服务于帝国的外交与宣传方面的重要意义。

摘要：We report a novel benzoxazole derivative,1,4-bis(benzo[d]oxazol-2-yl)naphthalene(BBON),exhibiting exceptional multifunctional properties for advanced optoelectronic *** crystals demonstrate remarkable multidirectional bending and twisting at room temperature and retain elasticity under extreme conditions,such as exposure to liquid nitrogen,showcasing their *** crystals can be crafted into complex mesh and lantern shapes,highlighting their versatility for flexible and wearable *** high pressure,BBON exhibits significant piezochromic shifts,with the emission wavelength shifting from 477 to 545 nm upon pressure *** crystals,with a high quantum yield of 72.26%,exhibit excellent optical waveguide performance:0.38 dB/cm when straight and 0.56 dB/cm when *** properties make them ideal for smart sensors and flexible electronic ***-crystal analyses reveal that molecular stacking and intermolecular interactions are crucial to their elastic and piezochromic properties,providing insights for the design of future responsive materials.

摘要：玫瑰树碱(ellipticine)是一种来源于天然产物的细胞毒生物碱,具有抗肿瘤作用和抗艾滋病毒活性。自1959年首次被分离后,众多合成化学家设计并完成了玫瑰树碱的全合成路线。本文根据起始原料的不同对玫瑰树碱及衍生物的合成方法进行了综述,同时探讨了该类化合物的抗肿瘤活性作用机制,还对玫瑰树碱的抗肿瘤的构效关系进行了总结。

摘要：卡斯·吉尔伯特是美国建筑史上一位具有深远影响的建筑师,被誉为美国伟大的传统主义建筑师,摩天大楼的先驱者。他以建筑艺术性为纽带融合了欧洲古典建筑的深厚底蕴、鲍扎艺术的庄严比例以及现代建筑的创新技术,形成了对19至20世纪美国式建筑困境的独特解答。本文以卡斯·吉尔伯特为研究对象,深入探讨了在20世纪社会变革与技术进步的大背景下,建筑师如何在现代建筑趋势与传统建筑遗产之间实现和谐共生的问题。文章着重剖析了吉尔伯特在传统建筑设计中的艺术传承与现代功能范畴下的艺术创新,以及对于新旧关系的辩证思考。或将为我国传统主义建筑的发展和地域性建筑设计研究提供新的视角与启示。

摘要：流道非均匀设计是改善质子交换膜燃料电池(PEMFC)内部物理场不均匀分布的最主要方式之一。已有研究设计思路主要是基于对PEMFC工作原理的定性理解确定设计方向,再在此设计方向上进行参数优化,而未能把所得结果反馈用于修正设计思路。对此提出了一种结果反馈再寻优的设计思路,首先对PEMFC结构参数进行参数分析,再对计算结果中物质输运过程进行定量分析,从而反馈确定结构设计方向。采用上述思路对单通道PEMFC流道宽度、单电池子流道高度进行了非均匀设计。结果表明:相比于对照组,采用非均匀设计的PEMFC净功率密度提升幅度为4%~6%,且PEMFC内物理场分布均匀性较好。该研究能够指导PEMFC流道结构不均匀设计方向,助力高性能、长寿命PEMFC设计。

摘要：Conjugated polymers exhibit exceptional adaptability in flexible thin-film transistors,owing to their inherent flexibility and high charge ***,achieving conjugated polymers that demonstrate both high mobility and stability under mechanical stress,such as bending or stretching,remains a significant *** this study,we synthesized an ethylene-bridged conjugated polymer,PDPPVIDT,derived from methyl-side diketopyrrolopyrrole(DPP)and indacenodithiophene(IDT)aldehydes,using an environmentally friendly Knoevenagel condensation reaction under mild conditions,resulting in a moderate yield with promising *** characterization techniques revealed enhanced backbone planarity with stableπ-πstacking,while thin films of PDPPVIDT displayed a nearamorphous nature due to the conformational isomerism of the ethylene *** structure enables simultaneous charge transport and ***,flexible organic thinfilm transistor(OTFT)devices based on PDPPVIDT demonstrated excellent hole mobility(μh)reaching up to 1.70 cm^(2) V^(−1) s^(−1),along with high mechanical bending *** work underscores the potential of vinyl-bridged donor-acceptor conjugated polymers,highlighting the industrial adaptability of their production process and offering new insights for the design and synthesis of future flexible electronic materials.