摘要：UGC平台连接着内容创作者和消费者,双边用户间存在的同侧和跨侧网络效应吸引着他们进入一个或多个平台,从而形成不同的部分多归属结构。基于Hotelling模型,通过构建UGC平台的竞争模型,研究了双方均单归属(SS)、仅消费者边部分多归属(MS)和仅内容创作者部分多归属(SM)3种部分多归属结构下同侧和跨侧网络效应影响下的平台广告投放与内容创作补贴决策,以及其对市场份额和平台利润的影响。研究发现:当消费者边单归属(SS或SM)时,平台的广告投放随同侧网络效应单调递减;当消费者边多归属(MS)时,平台的内容创作补贴和消费者规模会随同侧网络效应单调递增,而同侧网络效应对平台的广告投放水平的影响是非单调的,其受到消费者对广告厌恶水平的影响。当消费者边多归属(MS)时,随着消费者边的跨侧网络效应的增加,平台会采取提高广告投放水平和内容创作者补贴,即从消费者处获得更多的广告收入以补贴内容创作者的策略;而随着内容创作者边的跨侧网络效应的增加,平台会降低广告水平并提高内容创作者补贴,即采取同时向两边用户让利的策略。当内容创作者边多归属(SM)时,随着消费者边的跨侧网络效应的增加,平台会同时向两边用户让利;而随着内容创作者边的跨侧网络效应的增加,平台会降低广告投放和内容创作者补贴水平,即降低对内容创作者的补贴而让消费者观看更少的广告。当某一边用户选择多归属时,该边用户的规模会随跨侧网络效应的提升而增长。通过对不同情形下均衡结果的横向比较,还发现双边用户中存在多归属的前提是较强的跨侧网络效应,而内容创作者多归属时,平台更容易对内容创作者提供补贴。

摘要：为研究全渠道供应链中广告合作及定价策略问题,考虑由单一制造商和单一零售商组成的包括线下、纯线上以及BOPS渠道的全渠道供应链系统。基于消费者渠道偏好差异及市场需求划分,构建3种不同渠道组合下的全渠道供应链广告合作与定价决策模型,对比非合作广告策略研究广告合作对全渠道供应链的影响。研究表明:同时存在线下、纯线上和BOPS的全渠道系统中,BOPS渠道佣金水平越高,制造商和零售商的定价越高;广告合作策略在很大范围内会促进制造商和零售商提高广告投放水平,增加市场需求;全渠道模式下广告合作并不总是能提升零售商的利润。

摘要：light olefins are important platform feedstocks in the petrochemical industry,and the ongoing global economic development has driven sustained growth in demand for these *** dehydrogenation of alkanes,derived from shale gas,serves as an alternative olefins production ***,the target of realizing carbon neutrality promotes the comprehensive utilization of greenhouse *** integrated process of light alkanes dehydrogenation and carbon dioxide reduction(CO_(2)-ODH)can produce light olefins and realize resource utilization of CO_(2),which has gained wide *** the introduction of CO_(2),coke deposition and metal reduction encountered in alkanes dehydrogenation reactions can be effectively ***_(2)-assisted alkanes dehydrogenation can also reduce the risk of potential explosion hazard associated with O_(2)-oxidative dehydrogenation *** investigations into various metal-based catalysts including mono-and bi-metallic alloys and oxides have displayed promising performances due to their unique *** paper provides the comprehensive review and critical analysis of advancements in the CO_(2)-assisted oxidative dehydrogenation of light alkanes(C2-C4)on metal-based catalysts developed in recent ***,it offers a comparative summary of the structural properties,catalytic activities,and reaction mechanisms over various active sites,providing valuable insights for the future design of dehydrogenation catalysts.

摘要：乡土中的食品包装深刻地体现出一种人与设计、人与传统、人与自然之间的亲密综合关系,在食品包装设计过程中融入设计伦理,意在让人们从伦理学的角度去思考这种综合关系,自上而下将伦理关怀导入设计实践,从而为今后的乡土食品包装建立清晰的设计伦理意识。

摘要：膨胀珍珠岩颗粒与有机胶合体系复配改性后,经过模压静置加压、保压脱模、热反应固化成型得到有机胶合阻燃热固复合保温板。研究了膨胀珍珠岩颗粒密度、模压比以及用胶量对热固复合保温板力学性能和导热性能的影响,并进行微观分析。结果表明:复配改性阻燃胶合体系能够有效胶结膨胀珍珠岩颗粒,制备的热固复合保温板密度低,抗压强度可达0.31 MPa,导热系数仅为0.054 W/(m·K),且具备A级不燃性能,应用于建筑外墙外保温前景可观。

摘要：网络广告既具有短期效应也具有长期效应。为研究不同效应下的网络广告投放策略对广告收益的影响,构建考虑长期效应与短期效应的双寡头企业网络广告投放决策模型,并分析双寡头企业在分别采用长期广告策略与短期广告策略下企业的最优广告收益。研究结果表明:当有一方企业采用短期广告投放策略时,另一方可采用长期广告投放策略来实现收益最大化;当一方企业采用长期广告投放策略时,另一方可采用多期短期广告投放策略,并缩短每期的广告投放间隔以增加广告曝光次数;品牌偏好及单位时间内广告的点击量均影响市场总收益的变化。研究结论对企业在竞争市场中选择最优网络广告投放策略具有一定的参考作用。

摘要：双曲面斜交网格筒由两方向斜柱交叉编织构成,在一个方向斜柱全长贯通(称为主斜柱),另一个方向斜柱在节点处断开(称为次斜柱),二者相交处采用相贯焊接连接。以中国动漫博物馆工程双曲面斜交网格筒柱为研究对象,基于节点破坏不先于双曲面斜交网格筒破坏的设计原则,设计制作相贯节点模型,对双曲面斜交网格筒中采用的圆管相贯节点的破坏模式和承载力进行试验研究,对比分析未加强节点和主管内设置一字形加劲板加强节点的承载性能,结果表明,设置一字形加劲板对节点承载力有加强作用,但制作工艺复杂,综合经济效益不佳。通过有限元软件ANSYS建立圆管相关节点试件模型对试验进行模拟分析,验证了有限元模型的可靠性。分别建立圆管相贯节点和双曲面斜交网格筒的有限元模型,研究次主斜柱的壁厚比对圆管相贯节点承载性能和双曲面斜交网格筒稳定性能的影响,结果表明,通过合理设置次主斜柱壁厚比(0.46~0.70),可以避免次斜柱的屈服破坏和节点的过早破坏。

摘要：Solar-driven photoelectrochemical(PEC) water splitting is a promising technology for sustainable hydrogen production, which relies on the development of efficient and stable photoanodes for water oxidation reaction. The thickness and microstructure of semiconductor films are generally crucial to their PEC properties. Herein, three-dimensional(3D) interconnected nanoporous Ta3N5 film photoanodes with controlled thickness were successfully fabricated via galvanostatic anodization and NH3 nitridation. The porous Ta3N5 nanoarchitectures(NAs) of 900 nm in thickness showed the highest PEC performance due to the optimal lightharvesting and charge separation. Compared with the holeinduced photocorrosion, the electrochemical oxidation at high anodic potentials resulted in severer performance degradation of Ta3N5. Although the surface oxide layer on deteriorated Ta3N5 photoanodes could be removed by NH3 re-treatment,the PEC performance was only partially recovered. As an alternative, anchoring a dual-layer Co(OH)x/Co OOH co-catalyst shell on the porous Ta3N5 NAs demonstrated substantially enhanced PEC performance and stability. Overall, this work provides reference to controllably fabricate 3D nanoporous Ta3N5-based photoanodes for efficient and stable PEC water splitting via optimizing the light absorption, hole extraction,charge separation and utilization.

摘要：A series of sphere-rod shape amphiphiles were designed and synthesized by connecting the rod-like oligofluorenes with different lengths （OF,） to the different positions of the spherical [60]fullerene （C60） through a rigid linkage. The conjugates were characterized by IH-NMR, 13C-NMR, FTIR, EA and MALDI-TOF mass spectrometry. The optical and electronic properties of the conjugates were studied by UV-Vis absorption spectroscopy, fluorescence spectrometry, and cyclic voltammetry. The results from UV-Vis absorption spectroscopy and cyclic voltammetry indicated that the energy profiles of C60 and OFn remained unchanged when different lengths of OFn were attached to C60. The electron affinities of the OFn-C60 conjugates were close to that of C60, while slight electronic interaction was found between the two individual chromophores （C60 and OFn） in their ground states. The fluorescence spectra exhibited a complete fluorescence quenching in the toluene solution, suggesting an effective energy transfer from OFn to C60. It presents a systematic study on the self- assembly, structure-property relationship, and potential technical applications of the conjugates.

摘要：A new series of benzamide derivatives as glucokinase activators （GKAs） were designed and synthesized, and their activation for glucokinase were evaluated by the preliminary glucokinase activity assay. The structure-activity relationship （SAR） is discussed. The result shows that compound 12d and 12h have potent activity reference drug RO-28-1675.