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Effect of mesopore spatial distribution of HZSM-5 catalyst on zinc state and product distribution in 1-hexene aromatization

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Chinese Journal of Chemical Engineering 2024年第3期67卷 16-26页

作者： chenhao wei Di Gao Guohao Zhang Liang Zhao Jinsen Gao Chunming Xu The State Key Lab of Heavy Oil Processing China University of Petroleum(Beijing)Beijing 102249China SINOPEC Research Institute of Petroleum Processing Co. Ltd.Beijing 100083China

1-hexene aromatization is a promising technology to convert excess olefin in fluid catalytic cracking(FCC)gasoline to high-value benzene(B),toluene(T),and ***,the increasing market demand of xylene has put forward higher requirements for new generation of *** increasing xylene yield in 1-hexene aromatization,the effect of mesopore structure and spatial distribution on product distribution and Zn loading was *** with different mesopore spatial distribution were prepared by post-treatment of parent HZSM-5 zeolite,including NaOH treatment,tetra-propylammonium hydroxide(TPAOH)treatment,and *** was found the evenly distributed mesopore mainly prolongs the catalyst lifetime by enhancing diffusion properties but reduces the aromatics selectivity,as a result of damage of micropores close to the catalyst *** the selectivity of high-value xylene can be highly promoted when the mesopore is mainly distributed interior the ***,the state of loaded Zn was also affected by mesopores spatial *** the optimized catalyst,the xylene selectivity was enhanced by 12.4%compared with conventional Zn-loaded parent HZSM-5 catalyst at conversion over 99%.It was attributed to the synergy effect of mesopores spatial distribution and optimized acid *** work reveals the role of mesopores in different spatial positions of 1-hexene aromatization catalysts in the reaction process and the influence on metal distribution,as well as their synergistic effect two on the improvement of xylene selectivity,which can improve our understanding of catalyst pore structure and be helpful for the rational design of high-efficient catalyst.

关键词： 1-Hexene aromatization Alkali treatment Xylene selectivity Mesopores Zinc state

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Effect of mesopore spatial distribution of HZSM-5 catalyst on zinc state and product distribution in 1-hexene aromatization

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中国化学工程学报（英文版） 2024年第3期 16页

作者： chenhao wei Di Gao Guohao Zhang Liang Zhao Jinsen Gao Chunming Xu

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LINC00488/miR-376a-3p/AGO2调控甲状腺乳头状癌细胞的凋亡

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生物技术 2024年第4期34卷 482-488页

作者：吴天思刘轩魏晨浩管佳琪保定市第二医院肿瘤外科河北保定071000 保定市第二医院肛肠外科河北保定071000 承德医学院研究生院外科学河北承德067000

[目的]探讨乏氧条件下长链非编码RNA LINC00488通过miR-376a-3p/AGO2调控甲状腺乳头状癌细胞凋亡的潜在机制。[方法]乏氧处理后,高通量测序和过表达筛选影响乏氧条件下甲状腺乳头状癌细胞B-CPAP凋亡水平的长链非编码RNA。过表达或敲低LI... 详细信息

[目的]探讨乏氧条件下长链非编码RNA LINC00488通过miR-376a-3p/AGO2调控甲状腺乳头状癌细胞凋亡的潜在机制。[方法]乏氧处理后,高通量测序和过表达筛选影响乏氧条件下甲状腺乳头状癌细胞B-CPAP凋亡水平的长链非编码RNA。过表达或敲低LINC00488、miR-376a-3p、AGO2后检测B-CPAP的凋亡水平。[结果]乏氧条件下,LINC00488的表达水平显著上升。敲低LINC00488后乏氧条件下B-CPAP细胞的凋亡水平显著上升[(24.59±3.55 vs 65.69±8.99)%,P<0.05]。过表达miR-376a-3p后乏氧条件下B-CPAP细胞的凋亡水平显著上升[(25.56±3.86 vs 69.04±9.52)%,P<0.05]。此外,LINC00488和miR-376a-3p存在碱基间的相互作用。敲低AGO2后乏氧条件下B-CPAP细胞的凋亡水平显著上升[(26.91±3.77 vs 60.72±8.45)%,P<0.05]。同时,miR-376a-3p靶向结合AGO2 mRNA的3′端非翻译区。过表达miR-376a-3p后乏氧条件下B-CPAP细胞中AGO2的mRNA和蛋白水平均下降(0.84±0.18 vs 0.11±0.01,P<0.05);敲低miR-376a-3p后乏氧条件下B-CPAP细胞中AGO2的mRNA和蛋白水平均上升(0.84±0.18 vs 1.43±0.23,P<0.05)。[结论]乏氧条件下,长链非编码RNA LINC00488结合miR-376a-3p后抑制了miR-376a-3p调节下游基因AGO2表达的能力,从而抑制了甲状腺乳头状癌细胞的凋亡。

关键词： LINC00488 miR-376a-3p AGO2 甲状腺乳头状癌凋亡乏氧非编码RNA 甲状腺癌

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Missing Value Imputation for Radar-Derived Time-Series Tracks of Aerial Targets Based on Improved Self-Attention-Based Network

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Computers, Materials & Continua 2024年第3期78卷 3349-3376页

作者： Zihao Song Yan Zhou wei Cheng Futai Liang chenhao Zhang Department of Early Warning Intelligence Early Warning AcademyWuhan430019China

The frequent missing values in radar-derived time-series tracks of aerial targets(RTT-AT)lead to significant challenges in subsequent data-driven ***,the majority of imputation research focuses on random missing(RM)that differs significantly from common missing patterns of *** method for solving the RM may experience performance degradation or failure when applied to RTT-AT *** autoregressive deep learning methods are prone to error accumulation and long-term dependency *** this paper,a non-autoregressive imputation model that addresses the issue of missing value imputation for two common missing patterns in RTT-AT is *** model consists of two probabilistic sparse diagonal masking self-attention(PSDMSA)units and a weight fusion *** learns missing values by combining the representations outputted by the two units,aiming to minimize the difference between the missing values and their actual *** PSDMSA units effectively capture temporal dependencies and attribute correlations between time steps,improving imputation *** weight fusion unit automatically updates the weights of the output representations from the two units to obtain a more accurate final *** experimental results indicate that,despite varying missing rates in the two missing patterns,our model consistently outperforms other methods in imputation performance and exhibits a low frequency of deviations in estimates for specific missing *** to the state-of-the-art autoregressive deep learning imputation model Bidirectional Recurrent Imputation for Time Series(BRITS),our proposed model reduces mean absolute error(MAE)by 31%~50%.Additionally,the model attains a training speed that is 4 to 8 times faster when compared to both BRITS and a standard Transformer model when trained on the same ***,the findings from the ablation experiments demonstrate that the PSDMSA,the weight fusion unit,cascade network design

关键词： Missing value imputation time-series tracks probabilistic sparsity diagonal masking self-attention weight fusion

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Generative deep-learning-embedded asynchronous structured light for three-dimensional imaging

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Advanced Photonics 2024年第4期6卷 45-58页

作者： Lei Lu chenhao Bu Zhilong Su Banglei Guan Qifeng Yu wei Pan Qinghui Zhang Henan University of Technology College of Information Science and Engineering Shanghai University Shanghai Institute of Applied Mathematics and Mechanics School of Mechanics and Engineering ScienceShanghai Key Laboratory of Mechanics in Energy Engineering Shaoxing Research Institute of Shanghai University National University of Defense Technology College of Aerospace Science and Engineering OPT Machine Vision Tech Co. Ltd. Department of Research and Development

Three-dimensional(3D) imaging with structured light is crucial in diverse scenarios, ranging from intelligent manufacturing and medicine to entertainment. However, current structured light methods rely on projector–camera synchronization, limiting the use of affordable imaging devices and their consumer applications. In this work, we introduce an asynchronous structured light imaging approach based on generative deep neural networks to relax the synchronization constraint, accomplishing the challenges of fringe pattern aliasing, without relying on any a priori constraint of the projection system. To overcome this need, we propose a generative deep neural network with U-Net-like encoder–decoder architecture to learn the underlying fringe features directly by exploring the intrinsic prior principles in the fringe pattern aliasing. We train within an adversarial learning framework and supervise the network training via a statisticsinformed loss function. We demonstrate that by evaluating the performance on fields of intensity, phase, and 3D reconstruction. It is shown that the trained network can separate aliased fringe patterns for producing comparable results with the synchronous one: the absolute error is no greater than 8 μm, and the standard deviation does not exceed 3 μm. Evaluation results on multiple objects and pattern types show it could be generalized for any asynchronous structured light scene.

关键词： asynchrony deep learning fringe pattern projection generative neural networks structured light three-dimensional imaging

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Optimizing the power conversion processes in diluted donor/acceptor heterojunctions towards 19.4%efficiency all-polymer solar cells

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Journal of Energy Chemistry 2024年第9期96卷 345-350页

作者： Liang Wang Chen Chen Zirui Gan chenhao Liu Chuanhang Guo weiyi Xia wei Sun Jingchao Cheng Yuandong Sun Jing Zhou Zexin Chen Dan Liu wei Li Tao Wang School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070HubeiChina School of Materials and Microelectronics Wuhan University of TechnologyWuhan 430070HubeiChina

All polymer solar cells(all-PSCs)promise mechanically-flexible and morphologically-stable organic photovoltaics and have aroused increased interests very ***,due to their disorderly conformation structures within the photoactive film,inefficient charge generation and carrier transport are observed which lead to inferior photovoltaic performance compared to smaller molecular acceptor-based ***,by diluting PM6 with a cutting-edge polymeric acceptor PY-IT and diluting PY-IT with PM6 or D18,donor-dominating or acceptor-dominating heterojunctions were *** X-ray and multiple spectrometer techniques reveal that the diluted heterojunctions receive increased structural order,translating to enhanced carrier mobility,improved exciton diffusion length,and suppressed non-radiative recombination loss during the power *** the results,the corresponding PM6+1%PY-IT/PY-IT+1%D18 and PM6+1%PY-IT/PY-IT+1%PM6 devices fabricated by layer-by-layer deposition received superior power conversion efficiency(PCE)of 19.4%and 18.8%respectively,along with enhanced operational lifetimes in air,outperforming the PCE of 17.5%in the PM6/PY-IT reference device.

关键词： All-polymer solar cells Power conversion efficiency Structural order Charge generation

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井下巷道纳米吸能安全防撞装置的设计与试验研究

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煤矿机械 2024年第3期45卷 25-27页

作者：史雅娜卫琛浩冯锋李盟洁党文龙张辰阳赵越李茂庆陕西煤业化工技术研究院有限责任公司西安710100

针对煤矿井下巷道跑车失速事故,提出一种纳米吸能安全防撞装置,利用有限元模拟分析软件,研究了失速车辆撞击装置的最大撞击力和装置的防撞效果,同时进行了2种工况下的实车碰撞试验验证。结果表明,纳米吸能安全防撞装置多级柔性碰撞缓冲... 详细信息

针对煤矿井下巷道跑车失速事故,提出一种纳米吸能安全防撞装置,利用有限元模拟分析软件,研究了失速车辆撞击装置的最大撞击力和装置的防撞效果,同时进行了2种工况下的实车碰撞试验验证。结果表明,纳米吸能安全防撞装置多级柔性碰撞缓冲吸收能量,快速将失控车辆导入正轨,且无骑跨翻越行为,驾驶室乘员的纵横加速度明显降低。该装置具有阻挡、导向和缓冲功能,对提高井下巷道运输安全具有重要意义。

关键词：煤矿安全巷道纳米吸能材料实车碰撞试验

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Comparison of 1 Versus 2 Doses of Quadrivalent Influenza Vaccine in 3-8-Year-Old Children with Different Immunological States—Jiangsu Province,China,2021

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China CDC weekly 2024年第19期6卷 424-430,I0002-I0004页

作者： Qian Liu Pengfei Jin Jingxin Li Xiaoqin Chen chenhao Wang Qingbin Lu wei Jiang Shixuan Zhang Lairun Jin Hongxin Pan Xue Guo Fengcai Zhu School of Public Health Southeast UniversityNanjing CityJiangsu ProvinceChina Jiangsu Provincial Medical Innovation Center National Health Commission Key Laboratory of Enteric Pathogenic MicrobiologyJiangsu Provincial Center for Disease Control and PreventionNanjing CityJiangsu ProvinceChina Donghai County Center for Disease Control and Prevention Donghai CityJiangsu ProvinceChina Changchun Institute of Biological Products Co. Ltd.Changchun CityJilin ProvinceChina Department of Laboratorial Science and Technology&Vaccine Research Center School of Public HealthPeking UniversityBeijingChina Key Laboratory of Epidemiology of Major Diseases(Peking University) Ministry of EducationBeijingChina

Summary What is already known about this topic?The quadrivalent influenza vaccine(QIV)provides protection against a broader range of influenza strains by including strains of influenza A/H1N1,A/H3N2,B/Yamagata,and B/*** is added by this report?This study aimed to assess the immunogenicity and safety of administering a single dose compared to two doses of QIV in children,taking into consideration their previous influenza vaccination history.

关键词： ent doses Jiangsu

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基于HTML的红色文化网站设计开发

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无线互联科技 2021年第11期18卷 64-65页

作者：卫辰浩西安翻译学院工程技术学院陕西西安710100

红色文化是新中国建立以来所特有的历史文化,它是新中国建立并走上富强之路的一段历史缩影。我们不仅仅要了解并学习这段文化,同时也要用我们自己的方式将这段文化传承下去,利用网站技术将其保存从而达到我们的目的。文章基于HTML对红... 详细信息

红色文化是新中国建立以来所特有的历史文化,它是新中国建立并走上富强之路的一段历史缩影。我们不仅仅要了解并学习这段文化,同时也要用我们自己的方式将这段文化传承下去,利用网站技术将其保存从而达到我们的目的。文章基于HTML对红色文化网站进行了设计开发,以期对红色文化的传承做出贡献。

关键词：红色文化网站开发 HTML

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碳酸铈煅烧试验研究

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稀有金属 2015年第12期39卷 1148-1152页

作者：朱军张建芳李波李志仁卫琛浩赵霞西安建筑科技大学冶金工程学院陕西西安710055

氧化铈作为一种重要的工业＂维生素＂被广泛应用于玻璃、陶瓷、发光材料、汽车尾气净化和金属铈生产等各个领域。针对传统稀土碳酸盐采用平推窑煅烧存在不连续、物料加热不均、反应速度慢、能耗高的问题,对碳酸铈的煅烧机制进行了试验研... 详细信息

氧化铈作为一种重要的工业＂维生素＂被广泛应用于玻璃、陶瓷、发光材料、汽车尾气净化和金属铈生产等各个领域。针对传统稀土碳酸盐采用平推窑煅烧存在不连续、物料加热不均、反应速度慢、能耗高的问题,对碳酸铈的煅烧机制进行了试验研究,为新型高效连续煅烧设备热工计算提供重要参考。以一定水分的稀土碳酸铈为原料,通过热重分析试验得到碳酸铈原料的热分解过程机制。试验发现：90~110℃为物料的自由水蒸发脱除过程,在140~220℃物料结晶水发生脱除,440℃左右发生物料脱碳的分解反应。根据上述试验结果进行了物料的煅烧试验,并对原料的含水率及产品粒度进行了试验分析,得出碳酸铈含有18.5%自由水和12.2%的结晶水;煅烧后产品的粒径分布范围在1~100μm之间,大多数颗粒粒径集中分布在10~100μm,少部分颗粒的粒径低于10μm;最后对煅烧产品进行X射线衍射（XRD）分析,得出产品为Ce O2,说明800℃下,60 min可以完成物料中的自由水、结晶水和二氧化碳脱除。

关键词：碳酸铈煅烧脱除氧化铈

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