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Density functional theory(DFT) studies of vanadium-titanium based selective catalytic reduction(SCR) catalysts

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Journal of Environmental Sciences 2020年第4期32卷 119-137页

作者： Ziwei Zhao erwei li Yu Qin Xiaolong liu Yang Zou Heng Wu Tingyu Zhu National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China State Key Laboratory of Solid Waste Reuse for Building Materials Beijing Building Materials Academy of Science ResearchBeijing 100041China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

Based on density functional theory(DFT)and basic structure models,the chemical reactions on the surface of vanadium-titanium based selective catalytic reduction(SCR)denitrification catalysts were *** structural models(non-periodic and periodic structural models)are the basis of density functional calculations.A periodic structure model was more appropriate to represent the catalyst surface,and its theoretical calculation results were more comparable with the experimental results than a nonperiodic *** is generally believed that the SCR mechanism where NH3 and NO react to produce N2 and H2 O follows an Eley-Rideal type ***2 NO was found to be an important intermediate in the SCR reaction,with multiple production ***,the effects of H2 O,SO2 and metal on SCR catalysts were also summarized.

关键词： Selective catalytic reduction(SCR) Structure model Vanadium-titanium based catalyst Density functional theory(DFT) Adsorption

Computer Animated Movie Havoc in Heaven

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China Today 1996年第9期45卷 61-62页

作者： $$$$ li erwei

ＣｏｍｐｕｔｅｒＡｎｉｍａｔｅｄＭｏｖｉｅＨａｖｏｃｉｎＨｅａｖｅｎＢｙＬＩＥＲＷＥＩＨＡＶＯＣＩＮＨｅａｖｅｎ，ａｍｏｖｉｅｃｏｍｂｉｎｉｎｇｏｎ－ｔｈｅ－ｓｐｏｔｆｉｌｍｉｎｇａｎｄｃｏｍｐｕｔｅｒｄｉｇｉｔａｌ... 详细信息

ＣｏｍｐｕｔｅｒＡｎｉｍａｔｅｄＭｏｖｉｅＨａｖｏｃｉｎＨｅａｖｅｎＢｙＬＩＥＲＷＥＩＨＡＶＯＣＩＮＨｅａｖｅｎ，ａｍｏｖｉｅｃｏｍｂｉｎｉｎｇｏｎ－ｔｈｅ－ｓｐｏｔｆｉｌｍｉｎｇａｎｄｃｏｍｐｕｔｅｒｄｉｇｉｔａｌａｎｉｍａｔｉｏｎ，ｈａｓｓｔａｒ...

关键词： Computer Animated Movie Havoc in Heaven

Quantitative characterization of filamentous fungal promoters on a single-cell resolution to discover cryptic natural products

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Science China(life Sciences) 2023年第4期66卷 848-860页

作者： Peng-lin Wei Jie Fan Jingwen Yu Zihui Ma Xian Guo Nancy PKeller erwei li Chunbo Lou Wen-Bing Yin State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China Savaid Medical School University of Chinese Academy of SciencesBeijing 100049China Department of Medical Microbiology and Immunology University of Wisconsin-MadisonMadisonWI 53706USA CAS Key Laboratory of Quantitative Engineering Biology Shenzhen Institute of Synthetic BiologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

Characterization of filamentous fungal regulatory elements remains challenging because of time-consuming transformation technologies and limited quantitative *** we established a method for quantitative assessment of filamentous fungal promoters based on flow cytometry detection of the superfolder green fluorescent protein at single-cell *** this quantitative method,we acquired a library of 93 native promoter elements from Aspergillus nidulans in a high-throughput *** strengths of identified promoters covered a 37-fold range by flow cytometry.P_(zipA) and P_(sltA)were identified as the strongest promoters,which were 2.9-and 1.5-fold higher than that of the commonly used constitutive promoter P_(gpdA).Thus,we applied P_(zipA)and P_(sltA)to activate the silent nonribosomal peptide synthetase gene Afpes1 from Aspergillus fumigatus in its native host and the heterologous host *** metabolic products of Afpes1 were identified as new cyclic tetrapeptide derivatives,namely,fumiganins A and *** method provides an innovative strategy for natural product discovery in fungi.

关键词： fungal promoter quantitative characterization single-cell resolution cryptic natural product activation of silent gene cluster

Uncovering the mysterious identity of Taisui——an old Chinese folk legend

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Science China(life Sciences) 2020年第12期63卷 1942-1945页

作者： erwei li Jinwei Ren Qian Chen Hanxing Zhang Bin lin Hui Zhang Shumin Zhang Xiaoling Zhang Lei Cai Xingzhong liu State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China Department of Microbiology College of Life SciencesNankai UniversityTianjin 300071China Key Laboratory of Plant Molecular Physiology Institute of BotanyChinese Academy of SciencesBeijing 100093China State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China

Dear Editor,Taisui(太岁) has attracted great attention in China because it has been described in ancient Chinese texts as an entity possessing mysterious properties. In Chinese mythology and folklore, Jupiter is the God of the "Sui"(year) and is worshiped in Daoism. Jupiter appears at the same location in the sky approximately every 12 years(Jupiter’s orbit is11.86 years). However, since each cycle of Jupiter lasts for exactly 11.86 years and one Chinese year cycle comprises exactly 12 years, after approximately 84.7 years, Jupiter travels one cycle more than the number of cycles assumed by the ancient Chinese, which is called Taisui. According to the belief of the ancient Chinese, people are alerted when Taisui is digging in the ground, foretelling the destruction of houses or occurrence of natural disasters, such as floods and earthquakes(Zhao et al., 2018).

关键词： Jupiter floods cycle

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《寻枪》也寻理想

电影艺术 2002年第2期 35-42页

作者：姜文李尔葳本刊特约记者

2001年有一部新导演拍摄的小成本电影引起了媒体超乎寻常的关注.关注的主要原因是:姜文是这部电影的主演兼监制.

关键词：电影《寻枪》主演导演姜文拍摄理想

3RHUR/PUS+PP混联机器人构型与性能分析

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农业机械学报 2021年第6期52卷 386-396页

作者：田昕赵铁石王唱李二伟盛煜燕山大学河北省并联机器人与机电系统实验室秦皇岛066004 燕山大学先进锻压成形技术与科学教育部重点实验室秦皇岛066004

为提升串并混联机器人大行程刚度与综合性能,提出一种带随动滑筒的3RHUR/PUS三自由度并联头串联XY双导轨的混联五自由度机器人构型。根据非线性约束方程组给出其位置正反解,并基于螺旋理论建立了串并混联的正逆运动学映射关系,基于建立... 详细信息

为提升串并混联机器人大行程刚度与综合性能,提出一种带随动滑筒的3RHUR/PUS三自由度并联头串联XY双导轨的混联五自由度机器人构型。根据非线性约束方程组给出其位置正反解,并基于螺旋理论建立了串并混联的正逆运动学映射关系,基于建立的混联机器人的柔度模型讨论了其方向刚度;综合考虑机器人的转动能力、力传递性能、速度和刚度性能,在利用线性加权法对机器人进行多目标优化的基础上,提出最优拉丁超立方采样(Optimal Latin hypercube sampling,OptLHS)与插值相结合的优化算法,从而缩短了优化计算所需时间,得到了机器人最优尺寸参数。

关键词：串并混联机器人五自由度运动学刚度多目标优化

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非惯性系折叠式并联稳定平台机构建模及分析

机械工程学报 2013年第17期49卷 101-109页

作者：刘晓赵铁石李二伟苑飞虎边辉燕山大学河北省并联机器人与机电系统实验室秦皇岛066004 燕山大学先进锻压成形技术与科学教育部重点实验室秦皇岛066004

以折叠式6自由度并联机构为例,提出一种非惯性系舰载稳定平台机构建模及分析方法。该方法通过分析舰船及稳定平台在惯性系中的运动,导出动平台位姿、速度及加速度由惯性系到非惯性系的合成变换公式,并给出了伴随变换矩阵;基于并联机构... 详细信息

以折叠式6自由度并联机构为例,提出一种非惯性系舰载稳定平台机构建模及分析方法。该方法通过分析舰船及稳定平台在惯性系中的运动,导出动平台位姿、速度及加速度由惯性系到非惯性系的合成变换公式,并给出了伴随变换矩阵;基于并联机构影响系数法建立并联式稳定平台输入运动与非惯性系及动平台广义运动之间的映射,获得表征这种映射关系的非惯性系一、二阶影响系数矩阵;以此为基础,给出了稳定平台各质点虚位移之间的关系式,并利用虚功原理建立稳定平台在非惯性系下的动力学模型。通过数值算例考察稳定平台在非惯性系中位姿、速度及加速度的变化规律,并分析非惯性系运动对系统的影响程度。提出的合成变换及映射关系不仅适用于机构学建模及分析,还可进一步用于非惯性系下稳定平台优化设计与控制。

关键词：非惯性系折叠式机构机器人伴随变换雅可比矩阵