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Pd single-atom catalysts derived from strong metal-support interaction for selective hydrogenation of acetylene

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Nano Research 2022年第12期15卷 10037-10043页

作者： yalin guo Yangyang Li Xiaorui Du Lin Li Qike Jiang Botao Qiao CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China University of Chinese Academy of Sciences Beijing100049China Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou510640China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China

Selective hydrogenation of acetylene in excess ethylene is an important reaction in both fundamental study and practical ***-based catalysts with high intrinsic activity are commonly employed,but usually suffer from low *** single-atom catalysts(SACs)usually exhibit outstanding ethylene selectivity due to the weakπ-bonding ethylene ***,the preparation of high-loading and stable Pd SACs is still confronted with a great *** this work,we report a simple strategy to fabricate Pd SACs by means of reducing conventional supported Pd catalysts at suitable temperatures to selectively encapsulate the co-existed Pd nanoparticles(NPs)/*** is based on our new finding that single atoms only manifest strong metal-support interaction(SMSI)at higher reduction temperature than that of NPs/*** derived Pd SACs(Pd1/CeO2 and Pd1/a-Fe2O3)were applied to acetylene selective hydrogenation,exhibiting much improved ethylene selectivity and high *** work offers a promising way to develop stable Pd SACs easily.

关键词： selective hydrogenation of acetylene Pd single-atom catalysts(SACs) weakπ-bonding ethylene adsorption strong metal-support interaction(SMSI)

Transformer-Based Deep Learning Network for Tooth Segmentation on Panoramic Radiographs

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Journal of Systems Science & Complexity 2023年第1期36卷 257-272页

作者： SHENG Chen WANG Lin HUANG Zhenhuan WANG Tian guo yalin HOU Wenjie XU Laiqing WANG Jiazhu YAN Xue Medical School of Chinese PLA Beijing 100853China Department of Stomatology the first Medical CentreChinese PLA General HospitalBeijing 100853China Department of Stomatology the First Medical CentreChinese PLA General HospitalBeijing 100853China Beihang University Beijing 100191China

Panoramic radiographs can assist dentist to quickly evaluate patients’overall oral health *** accurate detection and localization of tooth tissue on panoramic radiographs is the first step to identify pathology,and also plays a key role in an automatic diagnosis ***,the evaluation of panoramic radiographs depends on the clinical experience and knowledge of dentist,while the interpretation of panoramic radiographs might lead ***,it is of great significance to use artificial intelligence to segment teeth on panoramic *** this study,SWin-Unet,the transformer-based Ushaped encoder-decoder architecture with skip-connections,is introduced to perform panoramic radiograph *** well evaluate the tooth segmentation performance of SWin-Unet,the PLAGH-BH dataset is introduced for the research *** performance is evaluated by F1 score,mean intersection and Union(IoU)and Acc,Compared with U-Net,Link-Net and FPN baselines,SWin-Unet performs much better in PLAGH-BH tooth segmentation *** results indicate that SWin-Unet is more feasible on panoramic radiograph segmentation,and is valuable for the potential clinical application.

关键词： Deep convolutional neural network panoramic radiograph SWin-Unet Tooth segmentation

Direct synthesis of a disinfectant with fresh scent of green plants by semi-hydrogenation of alkynol on Pd single-atom catalysts

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Nano Research 2024年第5期17卷 3872-3878页

作者： Yan Jiang Xuetong Yu Yuxia Ji Xunzhu Jiang yalin guo Tianbo Li Liang Gao Rui Lang Yanxiong Fang Botao Qiao Jinxiang Dong School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116024China Guangdong Provincial Key Laboratory of Plant Resources Biorefinery Guangzhou 510006China School of Chemical Engineering and Technology China University of Mining and TechnologyXuzhou 221116China

Alcohol-based disinfectants have protected people in the coronavirus disease 2019(COVID-19)pandemic,but olfactory stimuli of ethanol may evoke unpleasant memories associated with stressful situations in the devastating infectious *** smell of ethanol in household cleaning and disinfectant products can be covered up by the fragrance additives,and 3-hexenol is especially appreciated for the characteristic,strong odor of green *** production of 3-hexenol relies on the selective hydrogenation of 3-hexyn-1-ol,where Lindlar catalyst is normally used for the superior *** achieving such catalytic transformation in ethanol solution seems as a direct way to produce a disinfectant with green aroma,a popular consumer product in the post-COVID era,severe leaching of toxic Pb hinders Lindlar catalyst as a promising *** find that the Fe_(2)O_(3) supported Pd single-atom catalyst is highly selective to fulfill semi-hydrogenation of 3-hexyn-1-ol in 75%ethanol,and the aforementioned household product is readily generated after filtrating the stable,solid catalyst out of reaction ***-atom catalysts have been frequently utilized for fine-chemical synthesis,while in this work they make stunning debut in practical manufacture of daily used products.

关键词： single-atom catalysis hydrogenation fragrance household product coronavirus disease 2019(COVID-19)

Analysis of Fracture of Pre⁃sintered Zirconia Material in Neck Milling

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International Journal of Plant Engineering and Management 2022年第3期27卷 158-176页

作者： WEI Chen JING Jianlong DING Chen QIAN Dongdong guo yalin Department of Prosthodontics Stomatological Hospital of Nanjing UniversityNanjing 210093China

With the continuous improvement of the accuracy requirements of clinical base or base tooth and denture,the design of denture neck edge is becoming thinner and thinner,and the presintering zirconia dioxide billet for denture making evacuation and low strength material mechanical characteristics make the certain probability of denture neck edge fragmentation and peeling in the cutting *** on this phenomenon,the abnormal wear is the main reason,and a method of high frequency ultrasonic time cleaning to reduce the fracture of the denture neck in actual cutting is proposed.

关键词： zirconium dioxide cutting neck edge fracture tool abnormal wear high frequency cleaning

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交通隧道工程碳排放核算及研究进展分析

现代隧道技术 2023年第1期60卷 1-10页

作者：郭春郭亚林陈政西南交通大学交通隧道工程教育部重点实验室成都610031 西南交通大学土木工程学院成都610031

为应对日趋严重的全球气候变暖问题,中国政府提出了“双碳”目标。交通隧道生产活动排放的温室气体是土木工程领域碳排放的主要来源之一,其节能减排工作开展的成效是按时按质完成“双碳”目标的关键。通过统计调研近10年来的相关文献,... 详细信息

为应对日趋严重的全球气候变暖问题,中国政府提出了“双碳”目标。交通隧道生产活动排放的温室气体是土木工程领域碳排放的主要来源之一,其节能减排工作开展的成效是按时按质完成“双碳”目标的关键。通过统计调研近10年来的相关文献,总结目前交通隧道碳排放计算分析的研究现状。结果表明,目前国内外常基于生命周期评价开展隧道生命周期的碳排放研究,同时选用排放系数法进行计算;多数文献主要围绕公路隧道、盾构隧道施工期的碳排放开展计算和减排分析,并且一般将隧道施工期碳排放划分为材料生产、材料运输和现场施工3个阶段。对隧道施工碳排放的影响因素、预测公式等方面的研究进展进行综合性叙述,可为后续研究提供参考。

关键词：交通隧道生命周期评价碳排放计算方法清单分析

基于WOA-DELM的成都地铁建设阶段温室气体预测

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隧道建设（中英文） 2022年第12期42卷 2048-2063页

作者：陈政郭亚林郭春西南交通大学交通隧道工程教育部重点实验室四川成都610031

为解决成都地铁设计和修建过程中碳排放计量问题,以成都地铁18号线6车站7区间为研究对象,采用机器学习算法对成都地铁建设阶段碳排放进行预测研究。基于生命周期评价(life cycle assessment,LCA)框架对地铁车站和盾构区间建筑材料生产... 详细信息

为解决成都地铁设计和修建过程中碳排放计量问题,以成都地铁18号线6车站7区间为研究对象,采用机器学习算法对成都地铁建设阶段碳排放进行预测研究。基于生命周期评价(life cycle assessment,LCA)框架对地铁车站和盾构区间建筑材料生产阶段、建筑材料运输阶段和现场施工阶段温室气体排放量进行计算,建立基于鲸鱼优化算法(whale optimization algorithm,WOA)的深度极限学习机(deep extreme learning machine,DELM)地铁碳排放预测模型,并与基于风驱动优化(wind driven optimizer,WDO)、灰狼优化(grey wolf optimizer,GWO)、粒子群优化(particle swarm optimizer,PSO)、人工蜂群优化(artificial bee colony,ABC)、多元宇宙优化(multi-verse optimizer,MVO)、原子搜索优化(atom search optimizer,ASO)的深度极限学习机(DELM)和未优化的BP(back propagation neural network)、KELM(kernel extreme learning machine)、DELM算法预测结果进行对比分析。研究得到:1)WOA-DELM算法预测结果相关一致性为0.757,略高于其他算法;2)根据WOA-DELM算法对地铁碳排放主要输入指标进行敏感性分析,得到地铁车站碳排放预测的关键影响因素为车站长度和轨面埋深,对应指标碳排放相对变化率分别为30.1%和23.1%。

关键词：地铁生命周期评价碳排放深度极限学习机预测模型

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激光参数对碳纤维复合材料质量烧蚀率的影响

复合材料学报 2006年第5期23卷 84-88页

作者：郭亚林梁国正丘哲明邓杰西北工业大学理学院应用化学系西安710072 西安航天复合材料研究所西安710025

为了研究激光参数对碳纤维增强有机硅改性环氧树脂复合材料质量烧蚀率的影响规律,选用不同激光参数、采用高强度CO2激光器对该复合材料进行了激光辐照试验。分别分析了入射激光的辐照时间、强度和光斑直径对碳纤维增强有机硅改性环氧树... 详细信息

为了研究激光参数对碳纤维增强有机硅改性环氧树脂复合材料质量烧蚀率的影响规律,选用不同激光参数、采用高强度CO2激光器对该复合材料进行了激光辐照试验。分别分析了入射激光的辐照时间、强度和光斑直径对碳纤维增强有机硅改性环氧树脂复合材料质量烧蚀率的影响规律。研究结果表明:激光辐照时间对该复合材料的质量烧蚀率的影响不大,而该复合材料的质量烧蚀率随入射激光强度和光斑直径的增大而增大。

关键词：激光参数碳纤维有机硅改性环氧树脂复合材料质量烧蚀率辐照时间激光强度光斑直径

真菌固态载体预处理对不灭菌玉米秸秆降解的影响

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农业机械学报 2016年第5期47卷 197-202页

作者：郭建斌郭亚琳赵倩吴树彪董仁杰中国农业大学工学院北京100083

采用云芝变色栓菌（Trametes versicolor）、色精木霉菌（Trichoderma chromospermum）、深绿木霉菌（Trichoderma atroviride）和云芝变色栓菌分别与色精木霉菌、深绿木霉菌的混合菌对干黄玉米秸秆进行真菌预处理。结果显示,真菌预处... 详细信息

采用云芝变色栓菌（Trametes versicolor）、色精木霉菌（Trichoderma chromospermum）、深绿木霉菌（Trichoderma atroviride）和云芝变色栓菌分别与色精木霉菌、深绿木霉菌的混合菌对干黄玉米秸秆进行真菌预处理。结果显示,真菌预处理不灭菌秸秆30 d后,木质纤维素的降解率几乎可以忽略,在不灭菌的环境中,接入的真菌对秸秆本身附着的微生物群落不能形成竞争优势,造成较低的木质素降解率。而云芝变色栓菌、色精木霉菌、深绿木霉菌以及云芝变色栓菌分别与色精木霉菌、深绿木霉菌的混合菌对灭菌秸秆预处理30 d后,木质素的降解率分别为34.0%、38.1%、38.1%、39.1%及40.3%。为降低秸秆的灭菌成本,将真菌预处理30 d后的灭菌秸秆作为真菌固态载体与不灭菌秸秆按照1∶9、1∶4及1∶1的干质量比混合培养30 d,结果显示,采用云芝变色栓菌分别与色精木霉菌和深绿木霉菌的混合菌固态载体预处理不灭菌秸秆,木质素降解率可达到30%~40%。因而,真菌固态载体可以较好地适应非灭菌环境并对秸秆中的木质素进行有效降解,是一种有效降低过程成本的预处理手段。

关键词：玉米秸秆木质素真菌预处理载体灭菌

Pd1/CeO2 single-atom catalyst for alkoxycarbonylation of aryl iodides

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Science China Materials 2020年第6期63卷 959-964页

作者： Fang Chen Tianbo Li Xiaoli Pan yalin guo Bing H an Fei Liu Botao Qiao Aiqin W ang Tao Zhang CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China Dalian National Laboratory for Clean Energy Dalian 116023China

Heterogenization of the homogeneous catalysis has been studied for almost 50 ***-atom catalysis has the advantages of both homo-and heterogeneous *** has been proposed,and subsequently experimentally verified that single-atom catalysis is able to bridge homo-and heterogeneous catalysis,thus providing a new avenue to realize the heterogenization of homogeneous *** of aryl halides is an effective method for the direct synthesis of carboxylic acid derivatives,and is commonly catalyzed by Pd-based homogeneous complexes with N/P-containing ligands and organic/inorganic ***,we firstly reported that Pd1/CeO2 single-atom catalyst showed good performance in the alkoxycarbonylation of aryl iodides *** base-free and ligand-free conditions,Pd1/CeO2 single-atom catalyst can transfer different aryl iodides to corresponding *** catalyst can be easily recovered and reused four times without significant loss of reactivity.

关键词： single-atom catalyst alkoxycarbonylation Pd1/CeO2 heterogenization base-free