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Theoretical Study on Dehydrogenation Reaction of Dihydrogen Bonded Phenol-Borane-Trimethylamine in excited state

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Theoretical Study on Dehydrogenation Reaction of Dihydrogen ...

Multiband metamaterial emitters for infrared and laser compatible stealth with thermal management based on dissipative dielectrics

第六届全国计算原子与分子物理学术会议

作者： Yonggang Yang yufang liu College of Physics and Materials Science Henan Normal University

＜正＞Time dependent density functional theory（TDDFT）and transition state theory（TST）have been performed to study the dehydrogenation process of dihydrogen bonded phenol-borane-trimethylamine（phenol-BTMA）in excited *** potential curve of phenol-BTMA in the ground state,which does not have the energy decreasing tendency with bond length shortening of O-H···H1-B,confirms that the dehydrogenation process does not occur in the ground *** analysis of geometric structure and infrared

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Photonics Research 2023年第2期11卷 290-298页

作者： KUN YU WEI ZHANG MENGDAN QIAN PENG SHEN yufang liu Henan Key Laboratory of Infrared Materials&Spectrum Measures and Applications School of PhysicsHenan Normal UniversityXinxiang 453007China

The modulation of thermal radiation in the infrared region is a highly anticipated method to achieve infrared sensing and camouflage. Here, a multiband metamaterial emitter based on the Al∕SiO_(2)∕Al nanosandwich structure is proposed to provide new ideas for effective infrared and laser-compatible camouflage. By virtue of the intrinsic absorption and magnetic resonance property of lossy materials, the thermal radiation in the infrared region can be rationally modulated. The fabricated samples generally present low emissivity(ε_(3–5μm)= 0.21,ε_(8–14μm)= 0.19) in the atmospheric windows to evade infrared detection as well as high emissivity(ε_(5–8μm)= 0.43) in the undetected band for energy dissipation. Additionally, the laser camouflage is also realized by introducing a strong absorption at 10.6 μm through the nonlocalized plasmon resonance of the SiO_(2)***, the fabricated emitter shows promising prospects in thermal management due to the good radiative cooling property that is comparable to the metallic Al material. This work demonstrates a multiband emitter based on the metasurface structure with compatible infrared-laser camouflage as well as radiative cooling properties, which is expected to pave new routes for the design of thermal radiation devices.

关键词： emitter laser thermal

Study on Rural Ecotourism Development in Yingshan Area of Chengyu Urban Agglomeration

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Journal of Tourism and Hospitality Management 2021年第3期9卷 165-172页

作者： liu yufang WANG Zhihua WANG Aizhong SONG Shuang Chongqing University of Arts and Sciences ChongqingChina

Chengdu-Chongqing urban agglomeration covers a large number of rural *** areas have unique topographic conditions,diverse landscape types,and beautiful natural environment,but the economic conditions are underdeveloped;the ecological environment is fragile and the tourism carrying capacity is *** the same time,they are facing the problems of lack of tourism facilities and low management level of scenic *** Yingshan area as an example,this paper evaluates the rural tourism development conditions from the aspects of location conditions,complementarity of tourism resources,highlights of tourism resources,tourist source conditions,and ecological environment,and makes a detailed plan for the functional zoning and tourism products of rural tourism *** research shows that in order to realize the sustainable development of rural tourism resources,Chengdu Chongqing urban agglomeration should take the global tourism concept as the scientific guidance,ecological protection as the premise,agricultural resources as the basis,and culture as the soul,carry out rational,orderly,and scientific rural ecotourism development,and create high-quality rural ecotourism products.

关键词： Chengdu Chongqing urban agglomeration ecotourism rural tourism resources Yingshan area

Tuning exciton dynamics by the dielectric confinement effect in quasi-two-dimensional perovskites

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Photonics Research 2024年第3期12卷 563-570页

作者： MINGHUAN CUI CHAOCHAO QIN YUANZHI JIANG SHICHEN ZHANG CHANGJIU SUN MINGJIAN YUAN YONGGANG YANG yufang liu Henan Key Laboratory of Infrared Materials&Spectrum Measures and Applications Henan Normal UniversityXinxiang 453007China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China Institute of Physics Henan Academy of SciencesZhengzhou 450046China

The dielectric confinement effect plays an essential role in optoelectronic *** studies on the relationship between the dielectric confinement and the photoelectric properties are ***,three organic spacers with different dielectric constants are employed to tune the exciton dynamics of quasi-two-dimensional(quasi-2D)Ruddlesden–Popper perovskite *** transient absorption spectroscopy reveals that the small dielectric constant ligand enables a weak dynamic disorder and a large modulation depth of the coherent phonons,resulting in a more complete energy transfer and the inhibition of a trap-mediated nonradiative ***,the increase in the bulk-ligand dielectric constant reduces the corresponding exciton binding energy and then suppresses the Auger recombination,which is beneficial for high-luminance lightemitting *** work emphasizes the importance of dielectric confinement for regulating the exciton dynamics of layered perovskites.

关键词： dielectric perovskite quasi

11世纪拜占庭历史书写转型探析——以邹伊和塞奥多拉的“紫衣女性”形象为例

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世界历史 2018年第6期 135-150,160页

作者：刘宇方天津师范大学欧洲文明研究院

11世纪拜占庭的历史书写经历了重要转型。一方面,它强调以人为本的叙事理念,确立了以统治者为叙事核心的写作方式,并开始大量运用插叙与倒叙的写作技巧,从而突破了传统编年史体例贬低人的叙述价值的局限,打破了传统编年史严格遵循事件... 详细信息

11世纪拜占庭的历史书写经历了重要转型。一方面,它强调以人为本的叙事理念,确立了以统治者为叙事核心的写作方式,并开始大量运用插叙与倒叙的写作技巧,从而突破了传统编年史体例贬低人的叙述价值的局限,打破了传统编年史严格遵循事件发展顺序的纪年叙述标准。另一方面,它创造出包含刻画人物外貌、性格和心理活动三个层次的写作模式,形成了由外及内、形象的视觉效果与抽象的情绪思维活动相结合的系统化写作特点,从而能层层深入地刻画出富有生活气息、复杂又完整的人物形象,弥补了以往历史书写程式化的写作缺陷。在这一转型中,被史家成功塑造出的邹伊和塞奥多拉的"紫衣女性"形象尤为全面地涵盖了转型的内容与特征。总体而言,取得绝对主导权的基督教文化在创造性地吸收和融合古典文化后所产生的新书写范式即是此阶段历史书写转型的本质。古典元素与基督教元素的有机结合,以及由此带来的人在思想境界上的升华,促使拜占庭文化最终发展至最高阶的成熟形态。

关键词：拜占庭史历史书写邹伊紫衣女性塞奥多拉

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北京与国际城市的比较研究

城市发展研究 2008年第2期15卷 104-110页

作者：刘玉芳 100021 北京工业大学经济与管理学院北京

21世纪初,北京提出建设国际化国际上大都市的战略目标,到2010年基本建立起国际化大都市的框架。为了评价北京国际化程度,论文选取了人口、经济、公共交通、航空运力和国际组织等几个主要指标,选择了国际上公认的国际城市纽约、东京、伦... 详细信息

21世纪初,北京提出建设国际化国际上大都市的战略目标,到2010年基本建立起国际化大都市的框架。为了评价北京国际化程度,论文选取了人口、经济、公共交通、航空运力和国际组织等几个主要指标,选择了国际上公认的国际城市纽约、东京、伦敦、巴黎、新加坡和香港等与北京进行比较,量化北京与国际城市的距离,提出加快国际化步伐的具体措施。

关键词：国际城市北京国际化大都市指标比较

Cationized Melamine-formaldehyde Resin for Improving the Wet Strength of Paper

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Paper And Biomaterials 2016年第1期1卷 56-62页

作者： HuaShan Wang LuMing Yang yufang liu KaiWen Mou YiZe Li RuiTao Cha Tianjin University of Science and Technology Tianjin 300457 China Beijing Engineering Research Center for BioNanotechnology and CAS Key Lab for Biological Effects of Nanomaterials and Nanosafety National Center for NanoScience and Technology Beijing 100190 China

In this work, melamine-formaldehyde resin was cationized by adding modifiers so that the fibers closely bonded to improve their usability and the wet strength of paper was greatly improved. Triethanolamine and dimethylamine were added to modify the melamine-formaldehyde resin,*** mechanism of the cationized resin was explored and the possible chemical reactions were deduced. It was concluded that,with the use of triethanolamine,the most optimum product was obtained by hydroxymethylation for 30 min with a temperature of 85℃ and p H of 9. 0 where n( melamine) ∶ n( formaldehyde) ∶ n( methanol) ∶ n( triethanolamine) was 100 ∶ 330 ∶ 450 ∶ 15. With the combined use of dimethylamine and methanol,the optimal product was acquired by condensation for 30 min at a temperature of 50℃ and p H of 2. 0 at melamine, formaldehyde, methanol, and dimethylamine molar ratio of100∶ 330∶ 350∶ 20. With the only use of dimethylamine,the optimal product was obtained by condensation at melamine,formaldehyde,dimethylamine molar ratio of 100∶ 330∶ 10. The wet tensile strength of fruit-bagging paper was improved by adding cationized melamine-formaldehyde resin. The zeta potential,charge density,and conductivity of the melamine-formaldehyde resin were also studied.

关键词： cationized melamine-formaldehyde resin wet tensile strength fruit-bagging paper triethanolamine dimethylamine

Theoretical Investigation of wave packet dynamics of Li2 with Femtosecond-Resolved Photoelectron Spectra

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Theoretical Investigation of wave packet dynamics of Li2 wit...

MAPK4 facilitates angiogenesis by inhibiting the ERK pathway in non-small cell lung cancer

第十五届全国原子与分子物理学术会议

作者： yufang liu,Ruiqinong liu,Junxia Ding, Henan Normal University,Xinxiang 453007,China

Time-dependent wave packet method is performed to calculate the time-resolved photoelectron spectra(TRPES) of the Li *** phenomena of PES corresponding to different

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Cancer Innovation 2024年第3期3卷 33-48页

作者： Jing Chen Jing Yang yufang liu Xu Zhao Juanjuan Zhao Lin Tang Mengmeng Guo Ya Zhou Chao Chen Dongmei Li Zhenke Wen Guiyou Liang Lin Xu Special Key Laboratory of Gene Detection&Therapy of Guizhou Province ZunyiGuizhouChina Department of Immunology Zunyi Medical UniversityZunyiGuizhouChina Department of Medical Physics Zunyi Medical UniversityZunyiGuizhouChina Institute of Biomedical Soochow UniversitySuzhouJiangsuChina Department of Cardiovascular Surgery Affiliated Hospital of Guizhou Medical UniversityGuiyangGuizhouChina

Background:Angiogenesis plays an important role in the occurrence and development of non-small cell lung cancer(NSCLC).The atypical mitogen-activated protein kinase 4(MAPK4)has been shown to be involved in the pathogenesis of various ***,the potential role of MAPK4 in the tumor angiogenesis of NSCLC remains ***:Adult male C57BL/6 wild-type mice were randomly divided into the control group and p-siMAPK4 intervention group,*** cell proliferation was analyzed with flow cytometry and immunofluorescence *** vascular density in tumor mass was analyzed by immuno-fluorescence *** expressions of MAPK4 and related signaling molecules were detected by western blot analysis and immunofluorescence staining,and so ***:We found that the expression of MAPK4,which was dominantly expressed in local endothelial cells(ECs),was correlated with tumor angiogenesis of ***,MAPK4 silencing inhibited the proliferation and migration abilities of human umbilical vein ECs(HUVECs).QKHZC-2020-4Y156,QKH-JC-2018-1428,QKH-RC-2019-5612;Collaborative Innovation Center of Chinese Ministry of Education,Grant/Award Number:2020-39;Program for Science and Technology Joint Fund Project in Zunyi Science and Technology Bureau and Zunyi Medical University,Grant/Award Numbers:ZSKH-RPT-2020-6,ZSKH-HZ-2021-193;Graduate Research Fund of Zunyi Medical University,Grant/Award Number:2023-ZYK-171 Global gene analysis showed that MAPK4 silencing altered the expression of multiple genes related to cell cycle and angiogenesis pathways,and that MAPK4 silencing increased transduction of the extracellular regulated protein kinases 1/2(ERK1/2)pathway but not Akt and c-Jun n-terminal kinase *** analysis showed that MAPK4 silencing inhibited the proliferation and migration abilities of HUVECs cultured in tumor cell supernatant,which was accompanied with increased transduction of the ERK1/2 *** data analysis suggested that the

关键词： angiogenesis endothelial cell MAPK4 NSCLC p-ERK1/2