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Desymmetrized pillar[8]arenes:High-yield synthesis,functionalization,and host-guest chemistry

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Chinese Chemical Letters 2025年第1期36卷 288-292页

作者： Jie Yang Xin-Yue Lou Dihua dai Jingwei Shi Ying-Wei Yang College of Chemistry Jilin UniversityChangchun 130012China School of Life Sciences Jilin UniversityChangchun 130012China Department of Laboratory Medicine Center China-Japan Union Hospital of Jilin UniversityChangchun 130033China

The preparation,functionalization,and investigations in host-guest properties of high-level pillararene macrocycles have long been a big challenge because of the lack of efficient synthetic ***,a novel type of pillararene derivative,namely desymmetrized pillar[8]arene(DP[8]A),has been successfully synthesized via a facile two-step strategy with high *** with its pillar[8]arene counterpart,DP[8]A is composed of four alkoxy-substituted benzene units and four bare benzene *** crystal analysis has been performed in order to unveil the molecular conformation and packing mode of DP[8]A,which indicated that DP[8]A possesses a unique chair-like structure and much smaller steric *** functional theory(DFT)calculations and electrostatic potential map suggested the inhomogeneous electronic distribution in the DP[8]A ***-soluble carboxylate-modified DP[8]A,that is,CDP[8]A,was also prepared to investigate the host-guest properties in aqueous solution with methyl viologen(MV),where the binding constant and morphologies of the formed host-guest complexes have been *** all,this new version of eight-membered pillararene derivative might potentially serve as a powerful macrocycle candidate for further applications in supramolecular chemistry.

关键词： Host-guest interaction Macrocycle chemistry Pillararenes Supramolecular chemistry Synthetic macrocycles

Bioenergy recovery and carbon emissions benefits of short-term bio-thermophilic pretreatment on low organic sewage sludge anaerobic digestion:A pilot-scale study

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Journal of Environmental Sciences 2025年第2期148卷 321-335页

作者： Hui Wang Xiang Fu Haozhe Huang Danni Shen Dongdong Fan Liming Zhu Xiaohu dai Bin Dong College of Environmental Science and Engineering Tongji UniversityShanghai 200092China Yangtze Eco-Environment Engineering Research Center China Three Gorges CorporationBeijing 100038China Yangtze River Eco-Environmental Engineering Research Center Shanghai InvestigationDesign and Research Institute Co.LTDShanghai 200092China China Construction Third Engineering Bureau First Engineering Co. Ltd.Wuhan 430000China

Sewage sludge in cities of Yangzi River Belt,China,generally exhibits a lower organic content and higher silt contentdue to leakage of drainage system,which caused low bioenergy recovery and carbon emission benefits in conventional anaerobic digestion(CAD).Therefore,this paper is on a pilot scale,a bio-thermophilic pretreatment anaerobic digestion(BTPAD)for low organic sludge(volatile solids(VS)of 4%)was operated with a long-term continuous flow of 200 *** VS degradation rate and CH_(4) yield of BTPAD increased by 19.93%and 53.33%,respectively,compared to those of *** analysis of organic compositions in sludge revealed that BTPAD mainly improved the hydrolysis of proteins in *** analysis of microbial community proportions by high-throughput sequencing revealed that the short-term bio-thermophilic pretreatment was enriched in Clostridiales,Coprothermobacter and Gelria,was capable of hydrolyzing acidified proteins,and provided more volatile fatty acid(VFA)for the subsequent *** combined with fluorescence quantitative polymerase chain reaction(PCR)analysis showed that the number of bacteria with high methanogenic capacity in BTPAD was much higher than that in CAD during the medium temperature digestion stage,indicating that short-term bio-thermophilic pretreatment could provide better methanogenic conditions for ***,the greenhouse gas emission footprint analysis showed that short-term bio-thermophilic pretreatment could reduce the carbon emission of sludge anaerobic digestion system by 19.18%.

关键词： Sludge Anaerobic digestion Bio-thermophilic pretreatment Pilot scale Molecular microbiology Carbon emissions

A smart finger patch with coupled magnetoelastic and resistive bending sensors

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Journal of Semiconductors 2025年第1期46卷 194-203页

作者： Ziyi dai Mingrui Wang Yu Wang Zechuan Yu Yan Li Weidong Qin Kai Qian School of Integrated Circuits Shandong UniversityJinan 250100China Department of Mechanical Engineering University of AucklandAuckland 1010New Zealand Department of Urology Qilu Hospital of Shandong UniversityJinan 250100China Shenzhen Research Institute of Shandong University Shenzhen 518000China Department of Critical Care Medicine Qilu hospital of Shandong universityJinan 250100China

In the era of Metaverse and virtual reality(VR)/augmented reality(AR),capturing finger motion and force interactions is crucial for immersive human-machine *** study introduces a flexible electronic skin for the index finger,addressing coupled perception of both state and process in dynamic tactile *** device integrates resistive and giant magnetoelastic sensors,enabling detection of surface pressure and finger joint *** e-skin identifies three phases of finger action:bending state,dynamic normal force and tangential force(sweeping).The system comprises resistive carbon nanotubes(CNT)/polydimethylsiloxane(PDMS)films for bending sensing and magnetoelastic sensors(NdFeB particles,EcoFlex,and flexible coils)for pressure *** inward bending resistive sensor,based on self-assembled microstructures,exhibits directional specificity with a response time under 120 ms and bending sensitivity from 0°to 120°.The magnetoelastic sensors demonstrate specific responses to frequency and deformation magnitude,as well as sensitivity to surface roughness during sliding and material *** system’s capability is demonstrated through tactile-based bread type and condition recognition,achieving 92%*** intelligent patch shows broad potential in enhancing interactions across various fields,from VR/AR interfaces and medical diagnostics to smart manufacturing and industrial automation.

关键词： human machine interface flexible sensor wearable sensor giant magnetoelastic effect inward bending sensor

Crop root system architecture in drought response

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Journal of Genetics and Genomics 2025年第1期52卷 4-13页

作者： Yanjun Zhang Xi Wu Xingrong Wang Mingqiu dai Yunling Peng College of Agronomy Gansu Agricultural UniversityLanzhouGansu 730070China State Key Laboratory of Aridland Crop Science Gansu Agricultural UniversityLanzhouGansu 730070China Crop Research Institute Gansu Academy of Agricultural SciencesLanzhouGansu 730070China Key Laboratory of Crop Gene Resources and Germplasm Innovation in Northwest Cold and Arid Regions Ministry of Agriculture and Rural AffairsLanzhouGansu 730070China National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhanHubei 430070China Hubei Hongshan Laboratory WuhanHubei 430070China

Drought is a natural disaster that profoundly impacts on global agricultural production,significantly reduces crop yields,and thereby poses a severe threat to worldwide food *** the challenge of effectively improving crop drought resistance(DR)to mitigate yield loss under drought conditions is a global *** optimal root system architecture(RSA)plays a pivotal role in enhancing the capacity of crops to efficiently uptake water and nutrients,which consequently strengthens their resilience against environmental *** this review,we discuss the compositions and roles of crop RSA and summarize the most recent developments in augmenting drought tolerance in crops by manipulating RSA-related *** on the current research,we propose the potential optimal RSA configuration that could be helpful in enhancing crop ***,we discuss the existing challenges and future directions for breeding crops with enhanced DR capabilities through genetic improvements targeting RSA.

关键词： Crop Drought resistance Root system architecture Genetic improvement

1MJ/0.5MW传导冷却高温超导储能-限流磁体的传热分析

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低温与超导 2015年第6期43卷 46-49,60页

作者：丁立晴张京业辛昭昭张润理戴少涛王玉平西安高压电器研究院有限责任公司西安710075 中国科学院电工研究所北京100080

超导储能-限流系统(SMES-FCL Superconducting magnetic energy storage-Fault current limiting)是集储能与限流为一体的新型超导电力装置。文中介绍了一种用于1MJ/0.5MW高温超导储能—限流系统的传导冷却型磁体,给出了其导冷结构的组... 详细信息

超导储能-限流系统(SMES-FCL Superconducting magnetic energy storage-Fault current limiting)是集储能与限流为一体的新型超导电力装置。文中介绍了一种用于1MJ/0.5MW高温超导储能—限流系统的传导冷却型磁体,给出了其导冷结构的组成,分析了磁体内部热量(主要包括线圈的交流损耗和导冷结构的涡流损耗)的产生。并采用有限元分析软件,计算得到了稳定运行的冷头温度和磁体温度分布情况。

关键词：传导冷却高温超导磁体热分析

电阻型超导限流器研发现状及所面临的技术瓶颈

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低温与超导 2016年第7期44卷 1-5,9页

作者：刘路昕张京业戴少涛滕玉平赵连岐朱志芹许熙中国科学院大学北京100049 中国科学院电工研究所北京100190 江苏中天科技股份有限公司南通226463

我国短路电流超标问题日益严重,对新型限流技术的需求迫切。电阻型超导限流器因其结构简单、自动触发、限流效果明显、技术上相对容易实现等独特的优势,在高电压等级的输电网具有广阔的应用前景,成为目前国内外新型限流技术研究的热点... 详细信息

我国短路电流超标问题日益严重,对新型限流技术的需求迫切。电阻型超导限流器因其结构简单、自动触发、限流效果明显、技术上相对容易实现等独特的优势,在高电压等级的输电网具有广阔的应用前景,成为目前国内外新型限流技术研究的热点。主要介绍了电阻型超导限流器的发展背景、基本原理及国内外研究现状,并总结了电阻型限流器所面临的技术瓶颈与难题。

关键词：短路电流超导电阻型限流器

10kA高温超导直流电缆在线监控系统及其试验研究

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低温物理学报 2015年第5期37卷 418-422页

作者：朱志芹戴少涛张京业滕玉平郭文勇赵连岐中国科学院电工研究所中国科学院应用超导重点实验室江苏中天科技股份有限公司

10kA高温超导直流输电电缆于2012年9月26日投入示范运行,用于给电解铝车间供电10000A.本文介绍了10kA高温超导电缆在线监控系统的设计及其实现,10kA超导电缆并网运行前临界电流试验及数据分析,10kA超导电缆并网运行后各个参数的监测.通... 详细信息

10kA高温超导直流输电电缆于2012年9月26日投入示范运行,用于给电解铝车间供电10000A.本文介绍了10kA高温超导电缆在线监控系统的设计及其实现,10kA超导电缆并网运行前临界电流试验及数据分析,10kA超导电缆并网运行后各个参数的监测.通过精确测量超导电缆进出口温度计算10kA超导电缆系统的损耗,分析了超导电缆运行电流对超导电缆系统损耗的影响.

关键词：高温超导电缆在线监控临界电流损耗

1MJ超导储能-限流磁体暂态脉冲过程的传热规律研究

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低温与超导 2015年第12期43卷 1-5,30页

作者：丁立晴张京业辛昭昭张润理王玉平李侠戴少涛西安高压电器研究院有限责任公司西安710075 中国科学院电工研究所北京100080

超导储能-限流磁体的运行需承受短时大电流冲击的极端条件,如此快速变化的电流和磁场会诱发磁体快速产生大量的损耗,这些损耗最终以热的形式释放出来。由于制冷机传导冷却速率低,热的传导远远滞后于生热率,势必造成磁体的局部温升,甚至... 详细信息

超导储能-限流磁体的运行需承受短时大电流冲击的极端条件,如此快速变化的电流和磁场会诱发磁体快速产生大量的损耗,这些损耗最终以热的形式释放出来。由于制冷机传导冷却速率低,热的传导远远滞后于生热率,势必造成磁体的局部温升,甚至危及磁体安全。文中针对以上暂态脉冲过程,建立了暂态热仿真的微观模型,在时间和空间上揭示了磁体内部的传热规律。在此基础上,研究了极端运行工况下的超导带材温升情况及其临界电流的衰减程度,为磁体设计提供了理论依据。

关键词：传导冷却高温超导磁体暂态脉冲传热规律

Quantitative principles of dynamic interaction between rock support and surrounding rock in rockburst roadways

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International Journal of Mining Science and Technology 2025年第1期35卷 41-55页

作者： Lianpeng dai Dingjie Feng Yishan Pan Aiwen Wang Ying Ma Yonghui Xiao Jianzhuo Zhang Institute of Disaster Rock Mechanics Liaoning UniversityShenyang 110036China School of Environmental Sciences Liaoning UniversityShenyang 110036China CCTEG Tiandi Science&Technology Co. Ltd.Beijing 100013China School of Physics Liaoning UniversityShenyang 110036China School of Mechanics and Engineering Liaoning Technical UniversityFuxin 123000China

Rockbursts, which mainly affect mining roadways, are dynamic disasters arising from the surrounding rock under high stress. Understanding the interaction between supports and the surrounding rock is necessary for effective rockburst control. In this study, the squeezing behavior of the surrounding rock is analyzed in rockburst roadways, and a mechanical model of rockbursts is established considering the dynamic support stress, thus deriving formulas and providing characteristic curves for describing the interaction between the support and surrounding rock. Design principles and parameters of supports for rockburst control are proposed. The results show that only when the geostress magnitude exceeds a critical value can it drive the formation of rockburst conditions. The main factors influencing the convergence response and rockburst occurrence around roadways are geostress, rock brittleness, uniaxial compressive strength, and roadway excavation size. Roadway support devices can play a role in controlling rockburst by suppressing the squeezing evolution of the surrounding rock towards instability points of rockburst. Further, the higher the strength and the longer the impact stroke of support devices with constant resistance, the more easily multiple balance points can be formed with the surrounding rock to control rockburst occurrence. Supports with long impact stroke allow adaptation to varying geostress levels around the roadway, aiding in rockburst control. The results offer a quantitative method for designing support systems for rockburst-prone roadways. The design criterion of supports is determined by the intersection between the convergence curve of the surrounding rock and the squeezing deformation curve of the support devices.

关键词： Deep roadway Rockburst Dynamic interaction Rock support Surrounding rock Rockburst control