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Chinese Chemical Letters 2022年第11期33卷 4886-4890页

作者： Yingjie Yu Aiyao Liu jingrui He Chengting Wang Haibo Mei Jianlin han Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China

A visible-light-mediated reaction of indole derivatives employing arylsulfonyl chlorides as sulfonyl surrogates has been developed,which proceeds via the sequence of reduction of sulfonyl chloride,sulfonylation,and intramolecular cyclization.This mild protocol transforms a diverse array of indole tethered alkenes and simple sulfonyl chlorides into highly valuable functionalized tetrahydrocarbazoles in good yields.This reaction is also suitable for gram-scale synthesis,which provides an efficient and green access to multi-substituted tetrahydrocarbazoles.

关键词： Visible-light-irradiation Sulfonylation Tetrahydrocarbazoles Indoles Tandem radical reaction Sulfonyl chlorides

盐胁迫对15个草地早熟禾品种种子萌发的影响

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种子 2023年第2期42卷 102-107页

作者：张佳玲王丽宏孙鑫博郭站枫韩晶蕊秦玉娇李会彬河北省作物生长调控实验室/河北农业大学农学院河北保定071000

为评价不同草地早熟禾品种种子的耐盐性强弱,筛选耐盐性较好的品种,采用培养皿纸上发芽法,分析比较不同浓度盐溶液对15个草地早熟禾品种种子萌发的影响。结果表明,15个草地早熟禾品种种子的相对发芽率、相对胚芽长、相对胚根长、相对发... 详细信息

为评价不同草地早熟禾品种种子的耐盐性强弱,筛选耐盐性较好的品种,采用培养皿纸上发芽法,分析比较不同浓度盐溶液对15个草地早熟禾品种种子萌发的影响。结果表明,15个草地早熟禾品种种子的相对发芽率、相对胚芽长、相对胚根长、相对发芽指数、相对活力指数均受到盐胁迫的抑制,呈随盐浓度增加而下降的趋势。除“黄马夹”相对发芽势在0.3%盐溶液下有所提高外,其余品种的相对发芽势均明显低于对照,且盐浓度越高,相对发芽势越低。经隶属函数法评价得出各品种种子萌发耐盐性依次为:“纯绿”>“百思特”>“黄马夹”>“绿夏”>“公园”>“瑞银”>“新哥莱德”>“如意”>“蓝莓”>“布鲁克”>“标致”>“光影”>“优美”>“赛威”>“水晶”。

关键词：草地早熟禾盐胁迫种子萌发

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煤炭地下气化开发利用现状与发展趋势

中国煤炭 2024年第2期50卷 13-23页

作者：陈井瑞杨瑞召韩枫涛许超孙梦迪张昊中国矿业大学〈北京〉地球科学与测绘工程学院北京市海淀区100083

煤炭地下气化(UCG)作为一种可以将固体煤转化为气体燃料的技术,将煤炭在地下进行气化反应,可以缓解由于在地上燃烧煤炭而产生的大气污染,助力碳减排社会效益,对于实现低碳发展具有重要作用。以建立“清洁、低碳、安全、高效”的能源获... 详细信息

煤炭地下气化(UCG)作为一种可以将固体煤转化为气体燃料的技术,将煤炭在地下进行气化反应,可以缓解由于在地上燃烧煤炭而产生的大气污染,助力碳减排社会效益,对于实现低碳发展具有重要作用。以建立“清洁、低碳、安全、高效”的能源获取方式为出发点,介绍了我国煤炭地下气化的研究历程、发展目标和政策方针,对我国发布的关于煤炭资源利用和煤炭地下气化技术的相关政策进行了分析解读。分别从经济、环境、社会效益3个维度对煤炭地下气化的开发利用价值进行分析,指出煤炭地下气化技术的开发利用可以为我国煤炭行业带来一定的效益。同时,在推动煤炭地下气化技术的发展过程中,还要注重环境保护和管理措施,确保技术实施的安全性和可持续性。基于PESTEL模型从政治、经济、社会、技术、环境、法律5个方面对煤炭地下气化技术的开发进行全面、系统的分析,并阐述了我国煤炭地下气化技术发展的不利因素。最后根据PESTEL模型分析结果,从技术、政策和环境3个方面对我国煤炭地下气化的发展提出了相应的解决方案和政策性建议。结果表明,煤炭地下气化技术具有潜在的经济和环境优势,需加强国内高校、企业与能源公司的协同合作,扩大国际合作范围,并制定和执行环境保护措施,以推动煤炭地下气化技术的发展,实现可持续能源开发和环境保护的双赢。

关键词：煤炭地下气化煤炭开发利用 PESTEL模型 “双碳”目标

Impacts of hydrogen annealing on the carrier lifetimes in p-type 4H-SiC after thermal oxidation

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Chinese Physics B 2023年第6期32卷 60-65页

作者：张锐军洪荣墩韩景瑞丁雄杰李锡光蔡加法陈厦平傅德颐林鼎渠张明昆吴少雄张宇宁吴正云张峰 Department of physics Xiamen universityXiamen 361005China Guangdong Tianyu Semiconductor Co. LtdDongguan 523808China

Thermal oxidation and hydrogen annealing were applied on a 100μm thick Al-doped p-type 4H-Si C epitaxial wafer to modulate the minority carrier lifetime,which was investigated by microwave photoconductive decay(μ-PCD).The minority carrier lifetime decreased after each thermal oxidation.On the contrary,with the hydrogen annealing time increasing to3 hours,the minority carrier lifetime increased from 1.1μs(as-grown)to 3.14μs and then saturated after the annealing time reached 4 hours.The increase of surface roughness from 0.236 nm to 0.316 nm may also be one of the reasons for limiting the further improvement of the minority carrier lifetimes.Moreover,the whole wafer mappings of minority carrier lifetimes before and after hydrogen annealing were measured and discussed.The average minority carrier lifetime was up to 1.94μs and non-uniformity of carrier lifetime reached 38%after 4-hour hydrogen annealing.The increasing minority carrier lifetimes could be attributed to the double mechanisms of excess carbon atoms diffusion caused by selective etching of Si atoms and passivation of deep-level defects by hydrogen atoms.

关键词： 4H-SiC carrier lifetime hydrogen annealing

iNet:visual analysis of irregular transition in multivariate dynamic networks

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Frontiers of Computer Science 2022年第2期16卷 124-139页

作者： Dongming han Jiacheng PAN Rusheng PAN Dawei ZHOU Nan CAO jingrui HE Mingliang XU Wei CHEN State Key Lab of CAD&CG Zhejiang UniversityHangzhou 310058China Department of Computer Science and Engineering Arizona State UniversityArizona 85287America Tong Ji Intelligent Big Data Visualisation Lab(iDVx Lab) TongJi UniversityShanghai 200082China Department of Computer Science and Technology Zhengzhou UniversityZhengzhou 450001China

Multivariate dynamic networks indicate networks whose topology structure and vertex attributes are evolving along time.They are common in multimedia applications.Anomaly detection is one of the essential tasks in analyzing these networks though it is not well addressed.In this paper,we combine a rare category detection method and visualization techniques to help users to identify and analyze anomalies in multivariate dynamic networks.We conclude features of rare categories and two types of anomalies of rare categories.Then we present a novel rare category detection method,called DIRAD,to detect rare category candidates with anomalies.We develop a prototype system called iNet,which integrates two major visualization components,including a glyph-based rare category identifier,which helps users to identify rare categories among detected substructures,a major view,which assists users to analyze and interpret the anomalies of rare categories in network topology and vertex attributes.Evaluations,including an algorithm performance evaluation,a case study,and a user study,are conducted to test the effectiveness of proposed methods.

关键词： multivariate dynamic networks rare categories anomaly detection visual analysis

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稠油热采注蒸汽管道爆裂原因分析及对策

石油规划设计 1996年第6期7卷 5-6页

作者：宋祥林韩景瑞胜利石油管理局

针对胜利油田稠油热采注蒸汽管道运行参数高，起停频繁，腐蚀严重，爆裂突然等特点，详细分析了稠油热采注蒸汽管道爆裂原因，主要是由高氧化与腐蚀，氢脆腐蚀造成注蒸汽管道爆裂，针对稠油热采注蒸汽管道爆裂原因。

关键词：稠油油田热采注蒸汽管道腐蚀金相分析

Fluorine-containing drugs approved by the FDA in 2021

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Chinese Chemical Letters 2023年第1期34卷 29-38页

作者： jingrui He Ziyi Li Gagan Dhawan Wei Zhang Alexander E.Sorochinsky Greg Butler Vadim A.Soloshonok Jianlin han Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China Department of Biomedical Science Acharya Narendra Dev CollegeUniversity of DelhiNew Delhi 110019India Department of Chemistry University of Massachusetts BostonBostonMA 02125United States V.P.Kukhar Institute of Bioorganic Chemistry and Petrochemistry The National Academy of Sciences of UkraineKyiv 02094Ukraine Oakwood Chemical Inc.EstillSC 29918United States Department of Organic Chemistry I Faculty of ChemistryUniversity of the Basque Country UPV/EHU20018 San SebastiánSpain IKERBASQUE Basque Foundation for SciencePlaza Bizkaia48013 BilbaoSpain

Nine new fluorine-containing drugs have been approved by the US Food and Drug Administration(FDA)in 2021,which are presented in this review article.These small molecular drugs feature aromatic fluorine,trifluoromethyl and chlorodifluoro groups.The therapeutic areas of these fluorine-containing drugs include multiple myeloma,lymphoma,HIV,chronic heart failure,chronic myeloid leukemia,(ANCA)-associated vasculitis,migraines,von Hippel-Lindau disease,and non-small cell lung cancer.The brief biological activities and the synthetic methods have been discussed in this review for each of these nine drugs.

关键词： Fluorine-containing compounds Blockbuster drugs Pharmaceuticals Anti-cancer Drug design and development Asymmetric synthesis

玉米过氧化物酶和酯酶同工酶与杂种产量的关系

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作物学报 1989年第3期15卷 193-201页

作者：戴景瑞罗美中韩雅姗北京农业大学

以10个玉米自交系以及由它们组成的45个杂交种为材料,进行酶谱分析与单株粒重的测定。结果发现,玉米杂种 F_1的过氧化物酶同工酶 Px_4和酯酶同工酶 E_3的酶谱完全决定于其双亲。双亲酶谱相同,F_1与双亲一样;双亲酶谱不同,F_1出现双亲的... 详细信息

以10个玉米自交系以及由它们组成的45个杂交种为材料,进行酶谱分析与单株粒重的测定。结果发现,玉米杂种 F_1的过氧化物酶同工酶 Px_4和酯酶同工酶 E_3的酶谱完全决定于其双亲。双亲酶谱相同,F_1与双亲一样;双亲酶谱不同,F_1出现双亲的互补酶谱。这两种酶的酶谱有差别的双亲杂交,能够产生高产的组合;这两种酶的酶谱没有差异的双亲杂交,也能产生高产的组合。因而表明,这两种同工酶不能用来预测玉米单株粒重的大小。对用同工酶预测杂种产量的可行性问题进行了讨论。

关键词：玉米杂交种过氧化物酶同功酶

LEO Mega Constellations:Review of Development,Impact,Surveillance,and Governance

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Space(Science & Technology) 2022年第1期2022卷 472-488页

作者： jingrui Zhang Yifan Cai Chenbao Xue Zhirun Xue han Cai School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China

The rapid development of Low Earth Orbit(LEO)mega constellations has significantly contributed to several aspects of human scientific progress,such as communication,navigation,and remote sensing.However,unrestrained deployment of constellations has also strained orbital resources and increased spacecraft congestion in LEO,which seriously affects the safety of in-orbit operations of many space assets.For the long-term and sustainable development of space activities in LEO regions,space environment stability must be maintained using more rational surveillance and governance mechanisms.This review contributes to the research gap and facilitates the development of LEO mega constellations.First,the current development of typical LEO mega constellations is reviewed,followed by the analysis of the impact of LEO mega constellations in terms of astronomical observation,spacecraft safety in orbit,and space environment evolution.Then,two main solutions to conduct the challenges raised by LEO mage constellations are elaborated:one is to ensure the safety operation of spacecraft using space surveillance infrastructures and space situational awareness technologies,and the other is to accelerate the deorbit of constellation satellites at the end of life based on postmission disposal and active removal methods.Finally,the future development and potential research directions of LEO mega constellations are prospected.

关键词： Impact restrained maintained

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科研智能化新趋势下知识服务的挑战与机遇

情报杂志 2022年第6期41卷 173-181,107页

作者：孙蒙鸽黄雨馨韩涛张婧睿中国科学院文献情报中心北京100190 中国科学院大学经济与管理学院图书情报与档案管理系北京100190 南京农业大学信息管理学院南京210095

[研究目的]当今数据驱动型研究时代,世界科技正呈现新的发展态势和特征。AI模型、系统的强有力发展,为科学研究带来新面貌,兴起了科研智能化的发展态势,同时也为当前知识服务的智能化升级带来契机。[研究方法]从科技情报服务视角,阐述... 详细信息

[研究目的]当今数据驱动型研究时代,世界科技正呈现新的发展态势和特征。AI模型、系统的强有力发展,为科学研究带来新面貌,兴起了科研智能化的发展态势,同时也为当前知识服务的智能化升级带来契机。[研究方法]从科技情报服务视角,阐述了科研智能化的发展现状及内涵特征,解析了其中的实现过程及特点,列举了嵌入科研智能化范式的知识服务变革方向,探讨了未来科研生态的两大问题,以期得到相关研究领域研究者与应用者的共同关注。[研究结论]为把握时代机遇,知识服务机构需要借助科研数据基础设施及科研数据推理平台,转型升级为知识内容方案的提供者和一线科研人员提供更智能、更强有力的支撑,加速知识发现过程,推动我国在世界科技发展中抢占先机。

关键词：科研智能化智能科学家数据智能人机融合科研数据融合知识服务