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Triplet-triplet annihilation upconversion materials as electrophoretic inks

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Chinese Chemical Letters 2024年第3期35卷 439-442页

作者： Qiaoyu Zhang Guiwen Luo Jinping chen Tianjun Yu Rui Hu Guoqiang Yang Yi Zeng Yi Li Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Key Laboratory of Photochemistry Institute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Luminescent materials that can be reversibly switched by electric field stimulation are attractive since the potential application for optoelectronic *** we report a triplet-triplet annihilation upconversion(TTA-UC)system with electrophoretic response which is developed as the electrophoretic *** TTA-UC system consists of an ionic derivative of 9,10-diphenyl anthracene(DPA)as the annihilator and Pt(II)octaethylporphyrin(PtOEP)as the *** applying an electric field,migration and enrichment of positively charged DPA derivatives towards the cathode results in a 20%enhancement of TTA-UC.A quasi-solid film for electrically writing is made using the electrophoretic TTA system as the ink and a platinum electrode as a *** prototype of TTA-UC ink demonstrates unique luminescence functions upon electrically writing and erasing,providing a promising strategy to develop electronic devices for display,information storage and encryption.

关键词： Triplet-triplet annihilation Photon upconversion Electrophoresis Electrophoretic ink Luminescence display

Comparison of Combustion Characteristics of Tars Produced with Tobacco Stem Biomass Gasification

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Journal of Renewable Materials 2024年第1期12卷 119-129页

作者： Bo chen Mingjun Wang Bo Liu chunping Lu Guohai Jia Yong Chao Chao Zhong School of Mechanical Engineering Hunan Institute of EngineeringXiangtan411104China School of Automotive Engineering Xiangtan Institute of TechnologyXiangtan411100China School of Electrical and Information Engineering Hunan Institute of EngineeringXiangtan411104China China Metallurgic Jingcheng(Xiangtan)Heavy Industry Equipment Co. Ltd.Xiangtan411100China Hunan Shuanghuan Fiber Molding Machinery Co. Ltd.Xiangtan411100China

In order to study the combustion characteristics of tar in biomass gasifier inner wall and gasification gas,“tobacco stem semi-tar inside furnace”,“tobacco stem tar inside furnace”and“tobacco stem tar out-of-furnace”were subjected to thermogravimetric experiments,and the combustion characteristics and kinetic characteristics were *** result shows that“tobacco stem semi-tar inside furnace”has the highest value and“tobacco stem tar out-of-furnace”is has the lowest value on ignition characteristics,combustion characteristics and combustible stability;“tobacco stem semi-tar inside furnace”has the lowest value and“tobacco stem tar outside furnace”has the highest value on burnout characteristics;“tobacco stem tar outside furnace”has the highest value and“tobacco stem tar inside furnace”has the lowest value on integrated combustion characteristics.

关键词： Tobacco stem tar gasifier combustion characteristics

Inhibition of EGFR attenuates EGF-induced activation of retinal pigment epithelium cell via EGFR/AKT signaling pathway

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International Journal of Ophthalmology(English edition) 2024年第6期17卷 1018-1027页

作者： Yu-Sheng Zhu Si-Rui Zhou Hui-Hui Zhang Tong Wang Xiao-Dong chen Faculty of Life Sciences and Medicine Northwest UniversityXi’an 710069Shaanxi ProvinceChina First Affiliated Hospital of Northwest University Northwest UniversityXi’an 710069Shaanxi ProvinceChina Department of Ophthalmology Xi’an No.1 HospitalXi’an 710002Shaanxi ProvinceChina Shaanxi Institute of Ophthalmology Shaanxi Provincial Key Lab of OphthalmologyClinical Research Center for Ophthalmology Diseases of Shaanxi ProvinceXi’an 710002Shaanxi ProvinceChina

AIM:To explore the effect of epidermal growth factor receptor(EGFR)inhibition by erlotinib and EGFR siRNA on epidermal growth factor(EGF)-induced activation of retinal pigment epithelium(RPE)***:Human RPE cell line(ARPE-19 cells)was activated by 100 ng/mL *** and EGFR siRNA were used to intervene EGF *** viability,proliferation,and migration were detected by methyl thiazolyl tetrazolium(MTT)assay,bromodeoxyuridine(BrdU)staining assay and wound healing assay,***/protein kinase B(AKT)pathway proteins and N-cadherin,α-smooth muscle actin(α-SMA),and vimentin were tested by Western blot *** was also determined by immunofluorescence ***:EGF treatment for 24h induced a significant increase of ARPE-19 cells’viability,proliferation and migration,phosphorylation of EGFR/AKT proteins,and decreased total EGFR *** suppressed ARPE-19 cells’viability,proliferation and migration through down regulating total EGFR and AKT protein *** also inhibited EGF-induced an increase of proliferative and migrative ability in ARPE-19 cells and clearly suppressed EGF-induced EGFR/AKT proteins phosphorylation and decreased expression of N-cadherin,α-SMA,and vimentin ***,EGFR inhibition by EGFR siRNA significantly affected EGF-induced an increase of cell proliferation,viability,and migration,phosphorylation of EGFR/AKT proteins,and up-regulation of N-cadherin,α-SMA,and vimentin ***:Erlotinib and EGFR-knockdown suppress EGF-induced cell viability,proliferation,and migration via EGFR/AKT pathway in RPE *** inhibition may be a possible therapeutic approach for proliferative vitreoretinopathy(PVR).

关键词： erlotinib epidermal growth factor receptor protein kinase B epithelial-mesenchymal transition retinal pigment epithelium cell

Simulation Study on the Heat Transfer Characteristics of a Spray-Cooled Single-Pipe Cooling Tower

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Fluid Dynamics & Materials Processing 2024年第9期20卷 2109-2126页

作者： Kaiyong Hu Zhaoyi chen Yunqing Hu Huan Sun Zhili Sun Tonghua Zou Jinghong Ning Tianjin Key Lab of Refrigeration Technology Department of Refrigeration and Low Temperature EngineeringTianjin University of CommerceTianjin300134China Jiangsu Yongzhiyu Technology Development Co. Ltd.Xuzhou221700China Shandong Onar Refrigeration Technology Co. Ltd.Binzhou256600China

The current study focuses on spray cooling applied to the heat exchange components of a cooling *** optimization of such processes is attempted by assessing different spray flow rates and droplet *** simplicity,the heat exchanger of the cooling tower is modeled as a horizontal round tube and a cooling tower spray cooling model is developed accordingly using a computational fluid dynamics(CFD)*** study examines the influence of varying spray flow rates and droplet sizes on the heat flow intensity between the liquid layer on the surface of the cylindrical tube and the surrounding air,taking into account the number of *** is observed that on increasing the spray flow strength,the heat flow intensity and extent of the liquid film in the system are enhanced ***,the magnitude of droplet size significantly impacts heat transfer.A larger droplet size decreases evaporation in the air and enhances the deposition of droplets on the round *** facilitates the creation of the liquid film and enhances the passage of heat between the liquid film and *** the number of nozzles,while maintaining a constant spray flow rate,results in a decrease in the flow rate of each individual *** decrease is not favorable in terms of heat transfer.

关键词： Spray cooling droplet sizes number of nozzles CFD

Tool-tip vibration prediction based on a novel convolutional enhanced transformer

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International Journal of Mechanical System Dynamics 2024年第1期4卷 34-47页

作者： Adeel Shehzad Xiaoting Rui Yuanyuan Ding Yu Chang Jianshu Zhang Hanjing Lu Yiheng chen Institute of Launch Dynamics Nanjing University of Science&TechnologyNanjingChina Automotive Engineering Centre University of Engineering&TechnologyLahorePakistan School of Science Nanjing University of Science and TechnologyNanjingChina College of Engineering Peking UniversityBeijingChina

Superior surface finish remains a fundamental criterion in precision machining operations,and tool-tip vibration is an important factor that significantly influences the quality of the machined ***-based models heavily rely on assumptions for model simplification when applied to complex high-end ***,these assumptions may come at the cost of compromising the model's *** contrast,data-driven techniques have emerged as an attractive alternative for tasks such as prediction and complex system *** exploit the advantages of data-driven models,this study introduces a novel convolutional enhanced transformer model for tool-tip vibration prediction,referred to as *** effectiveness of this model is demonstrated through its successful application in ultra-precision fly-cutting(UPFC)*** distinct variants of the model,namely,guided and nonguided CeT-TV,were developed and rigorously tested on a data set custom-tailored for UPFC *** results reveal that the guided CeT-TV model exhibits outstanding performance,characterized by the lowest mean absolute error and root mean square error ***,the model demonstrates excellent agreement between the predicted values and the actual measurements,thus underlining its efficiency and potential for predicting the tool-tip vibration in the context of UPFC.

关键词： tool-tip vibration ultraprecision fly cutting data-driven modeling transformer

Plant Chemical Defenses against Insect Herbivores—Using theWild Tobacco as a Model

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Phyton-International Journal of Experimental Botany 2024年第4期93卷 641-659页

作者： Guangwei Sun Xuanhao Zhang Yi Liu Liguang Chai Daisong Liu Zhenguo chen Shiyou Lü Hubei Provincial Tobacco Research Institute Wuhan430030China Shiyan Branch of Hubei Tobacco Company Shiyan442000China State Key Laboratory of Biocatalysis and Enzyme Engineering School of Life SciencesHubei UniversityWuhan430062China

The Nicotiana genus, commonly known as tobacco, holds significant importance as a crucial economic crop. Confrontedwith an abundance of herbivorous insects that pose a substantial threat to yield, tobacco has developed adiverse and sophisticated array of mechanisms, establishing itself as a model of plant ecological defense. Thisreview provides a concise overview of the current understanding of tobacco’s defense strategies against *** defenses, exemplified by its well-known tactic of secreting the alkaloid nicotine, serve as a potent toxinagainst a broad spectrum of herbivorous pests. Moreover, in response to herbivore attacks, tobacco enhancesthe discharge of volatile compounds, harnessing an indirect strategy that attracts the predators of the *** delicate balance between defense and growth leads to the initiation of most defense strategies only after aherbivore attack. Among plant hormones, notably jasmonic acid (JA), play central roles in coordinating thesedefense processes. JA signaling interacts with other plant hormone signaling pathways to facilitate the extensivetranscriptional and metabolic adjustments in plants following herbivore assault. By shedding light on these ecologicaldefense strategies, this review emphasizes not only tobacco’s remarkable adaptability in its natural habitatbut also offers insights beneficial for enhancing the resilience of current crops.

关键词： Tobacco herbivore chemical defense jasmonic acid regulation

MULTIPLE INTERSECTIONS OF SPACE-TIME ANISOTROPIC GAUSSIAN FIELDS

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Acta Mathematica Scientia 2024年第1期44卷 275-294页

作者：陈振龙苑伟杰 School of Statistics and Mathematics Zhejiang Gongshang UniversityHangzhou310018China

Let X={X(t)∈R^(d),t∈R^(N)}be a centered space-time anisotropic Gaussian field with indices H=(H_(1),…,H_(N))∈(0,1)~N,where the components X_(i)(i=1,…,d)of X are independent,and the canonical metric√(E(X_(i)(t)-X_(i)(s))^(2))^(1/2)(i=1,…,d)is commensurate with■for s=(s_(1),…,s_(N)),t=(t_(1),…,t_(N))∈R~N,α_(i)∈(0,1],and with the continuous functionγ(·)satisfying certain ***,the upper and lower bounds of the hitting probabilities of X can be derived from the corresponding generalized Hausdorff measure and capacity,which are based on the kernel functions depending explicitly onγ(·).Furthermore,the multiple intersections of the sample paths of two independent centered space-time anisotropic Gaussian fields with different distributions are *** results extend the corresponding results for anisotropic Gaussian fields to a large class of space-time anisotropic Gaussian fields.

关键词： anisotropic Gaussian field multiple intersections Hausdorff measure capacity

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舰船非接触水下爆炸系统的混合不确定度量化

中国舰船研究 2024年第3期19卷 115-126页

作者：梁霄杨伊伊陈江涛王瑞利山东科技大学数学与系统科学学院山东青岛266590 中国空气动力研究与发展中心四川绵阳621000 北京应用物理与计算数学研究所北京100094

[目的]舰船非接触水下爆炸建模与仿真(M&S)中同时存在品目繁多的认知不确定度和偶然不确定度,在M&S过程中引入的不确定度导致系统响应量(SRQ)的数值模拟结果与试验真值间产生较大偏差,影响M&S的性能。而使用非接触水下爆炸不确定度量化(... 详细信息

[目的]舰船非接触水下爆炸建模与仿真(M&S)中同时存在品目繁多的认知不确定度和偶然不确定度,在M&S过程中引入的不确定度导致系统响应量(SRQ)的数值模拟结果与试验真值间产生较大偏差,影响M&S的性能。而使用非接触水下爆炸不确定度量化(UQ)方法能提高M&S的可靠性和可信度。[方法]首先,针对无物理意义、通过试验直接标定的唯象参数,使用D-S证据理论(DSTE)融合不同学科专家(SME)的建议,得到唯象参数赋值区间和基本信度分配(BBA)函数。鉴于SME的个人工程经验和知识结构的局限性,采用多证据、多周期性融合方法,提高认知不确定度量化的客观性。其次,使用蒙特卡罗法研究非接触水下爆炸中高维输入偶然不确定度的传播。最后,当偶然不确定度和认知不确定度同时存在时,将唯象参数作为外层,不确定的物理量作为内层,使用双层循环法执行非接触水下爆炸的混合不确定度量化。[结果]结果表明,改进后的DSTE方法缩小了认知不确定度的取值范围,对SME初始意见改动较大,计算所得认知不确定度的BBA更精确、客观性更强。双层循环法可计算得到舰船非接触水下爆炸SRQ的可信置信区间和BBA,结果与常识吻合。[结论]研究结果可用于指导舰船防护设计和提高水下兵器爆炸毁伤能力。

关键词：混合不确定度量化非接触水下爆炸 D-S证据理论认知不确定度双层循环

Research and test of the measurement sensing device for the downforce of no-till planter row unit gauge wheels

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International Journal of Agricultural and Biological Engineering 2024年第2期17卷 250-259页

作者： Jiajie Shang Liyi Liu Ruifeng Zhang Hongcheng Li Shouyin Hou Hongxin Liu Haitao chen College of Engineering Northeast Agricultural UniversityHarbin 150036China College of Mechanical and Electrical Engineering Suqian UniversitySuqian 223800JiangsuChina

To effectively obtain the downforce of the gauge wheels in real time,mechanical models of the interaction among the ground,gauge wheels,gauge wheel arms,and depth adjustment lever were constructed.A measuring method was proposed for monitoring the downforce through a two-dimensional radial sensing device,and a corresponding prototype was *** simulation analysis of the sensing device with ANSYS,a 45°angle was determined to exist between the strain gauge axis and the sensing device axis,and the Wheatstone bridging circuit of R1+R3−R5−R7(R stands for resistance strain gauge,different figures represent the strain gauge number)and R2+R4−R6−R8 was *** to performance and calibration tests for the sensing device,the maximum interaction effect between the X and Y axes was 2.52%,and the output signal was stable and *** standard error of the slope of the fitting equation of the downforce calculation model is *** to the field test,the average downforce of the gauge wheels was 1148,1017,843,and 713 N,at different sowing speeds of 6,8,10,and 12 km/h,*** coefficients of variation were 0.40,0.41,0.62,and 0.71,*** results indicate that the downforce fluctuation of the gauge wheels became more severe with increasing planting *** the strain simulation analysis and field test verified that the measurement method is accurate and reliable,the performance of the sensing device is stable,the measurement method and sensing device meet the application requirements and lay a foundation for the research of accurate and stable control of downforce of no-till planter.

关键词： no-till planter gauge wheel downforce two-dimensional radial force sensing device strain analysis measurement mode and method