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Challenges and prospects for room temperature solid-state sodiumsulfur batteries

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Nano Research 2024年第3期17卷 1402-1426页

作者： Yashuang qiu Jing Xu Research Center of Grid Energy Storage and Battery Application School of Electrical and Information EngineeringZhengzhou UniversityZhengzhou 450001China

Room temperature sodium-sulfur(Na-S)batteries,known for their high energy density and low cost,are one of the most promising next-generation energy storage ***,the polysulfide shuttling and uncontrollable Na dendrite growth as well as safety issues caused by the use of organic liquid electrolytes in Na-S cells,have severely hindered their ***-state electrolytes instead of liquid electrolytes are considered to be the most direct and effective solution to solve the above ***,its practical application is still greatly challenged due to the poor interfacial compatibility between the all-solid-state electrolytes and the anode/cathode,ionic conductivity,and the shuttle effect caused by the presence of liquid phase in the quasi-solid-state *** paper presents a comprehensive review of solid-state Na-S batteries from the perspective of regulating interfacial compatibility and improving ionic conductivity as well as suppressing polysulfide *** to different components,solid-state electrolytes were divided into five categories:solid inorganic electrolytes,solid polymer electrolytes,polymer/inorganic solid hybrid electrolytes,gel polymer electrolytes,and liquid–solid inorganic hybrid ***,the prospect of developing high performance solid-state electrolytes to improve the cycling stability of room temperature Na-S cells is envisaged.

关键词： sodium-sulfur batteries solid-state electrolytes ionic conductivity polysulfide shuttling interfacial compatibility

Electrochemical conversion of organic compounds and inorganic small molecules

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Science China Chemistry 2024年第10期67卷 3223-3246页

作者： Weimei Zeng Youai qiu Department of Chemistry Nankai University

Electrochemical synthesis presents a facile and sustainable strategy to produce valuable molecules. This review summarizes the most recent advances in electrosynthesizing value-added compounds with inorganic small molecules. While “small molecules”refers to a broad spectrum of chemicals, we mainly focus on the electrochemical conversion of CO2, H2O/D2O, NH3and SO2until March 2024. This review intends to compare the results and display general trends throughout the field, with an emphasis on the substrate scope and mechanical aspect. Furthermore, we propose several techniques and protocols that can enable a more fundamental understanding of the electrochemical reaction involving inorganic small molecules and help drive this methodology toward commercialization.

关键词： electrochemical synthesis inorganic small molecule organic synthesis carbon dioxide water

Enhanced service stability and thermoelectric performance in Cu_(2)−δSebased composites

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Science China Materials 2024年第7期67卷 2369-2370页

作者： Pengfei qiu Xun Shi State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China

Thermoelectric(TE)materials can directly convert the industrial waste heat into useful electricity based on the Seebeck effect,providing a promising way to tackle the environmental pollution and global energy crisis[1].In the past several decades,many new high-performance TE materials have been discovered to enrich the TE *** them,Cu_(2)−δSe-based TE materials,which are in line with the“phonon-liquid electron-crystal”concept,have sparked widespread interest due to the high TE figure-of-merit(ZT)and the combination of elements that are nontoxic and earth-abundant[2].In 2012,Liu et al.[3]reported a ZT of 1.5 at 1000 K in the stoichiometric Cu_(2)*** alloying S at the Se-site,the ZT was enhanced to around 2.0 at 1000 K[4].Via incorporating carbon nanotubes,the ZT was further enhanced to 2.4 at 1000 K[5].Moreover,Yang et al.[6]and Zhou et al.[7]reported that the ZT of Cu_(2)Se/BiCuSeO composites can reach 2.7–2.8 around 1000 K.

关键词： composites BiCuSeO performance

y-Tuning: an efficient tuning paradigm for large-scale pre-trained models via label representation learning

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Frontiers of Computer Science 2024年第4期18卷 107-116页

作者： Yitao LIU Chenxin AN Xipeng qiu School of Computer Science Fudan UniversityShanghai 200433China

With current success of large-scale pre-trained models(PTMs),how efficiently adapting PTMs to downstream tasks has attracted tremendous attention,especially for PTMs with billions of *** work focuses on designing parameter-efficient tuning paradigms but needs to save and compute the gradient of the whole computational *** this paper,we propose y-Tuning,an efficient yet effective paradigm to adapt frozen large-scale PTMs to specific downstream tasks.y-Tuning learns dense representations for labels y defined in a given task and aligns them to fixed feature *** computing the gradients of text encoder at training phrase,y-Tuning is not only parameterefficient but also *** results show that for DeBERTaxxL with 1.6 billion parameters,y-Tuning achieves performance more than 96%of full fine-tuning on GLUE Benchmark with only 2%tunable parameters and much fewer training costs.

关键词： pre-trained model lightweight fine-tuning paradigms label representation

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针刺“头四关穴”治疗偏头痛的临床研究

辽宁中医杂志 2006年第11期33卷 1484-1485页

作者：刘波邱丽敏大连市中医医院辽宁大连116013

目的:观察针刺“头四关穴”—太阳穴、风池穴治疗偏头痛的疗效及对脑血流、血NO、ET的影响。方法:120例偏头痛患者随机分为治疗组60例,对照组60例,治疗组针刺太阳穴和风池穴,对照组口服尼莫地平。经治30天后,观察临床疗效、TCD及血液生... 详细信息

目的:观察针刺“头四关穴”—太阳穴、风池穴治疗偏头痛的疗效及对脑血流、血NO、ET的影响。方法:120例偏头痛患者随机分为治疗组60例,对照组60例,治疗组针刺太阳穴和风池穴,对照组口服尼莫地平。经治30天后,观察临床疗效、TCD及血液生化指标。结果:治疗组即刻疗效、短期疗效和长期疗效的总有效率分别为94.8%、87.9%和81.0%,均优于对照组(P<0.01)。治疗前后两组TCD检查均有显著改善,而治疗组对大脑后动脉、椎动脉和基底动脉的改善程度尤其显著(P<0.01)。治疗组可显著降低血浆ET、NO水平。结论:针刺“头四关穴”的即刻、短期和长期疗效均很好,可显著改善偏头痛患者的脑血流状态,降低偏头痛患者的血浆ET、NO水平。

关键词：太阳穴风池穴针刺偏头痛疗效观察 TCD NO ET

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大流量气体管道中阀门诱发振动机理研究

低温工程 2016年第4期 50-55页

作者：刘丽张小斌邱利民浙江大学制冷与低温研究所杭州310027 浙江省制冷与低温技术重点实验室杭州310027

以某大型化工厂气体管道阀门小开度工况下的振动管路为例,系统介绍了振动激励源的发现与振动的抑制方法。考虑复杂管系支撑对管系固有频率的影响,采用模态分析得到管系模态频率与模态振型。采用CFD模拟方法,对管道内部气体流场进行模拟... 详细信息

以某大型化工厂气体管道阀门小开度工况下的振动管路为例,系统介绍了振动激励源的发现与振动的抑制方法。考虑复杂管系支撑对管系固有频率的影响,采用模态分析得到管系模态频率与模态振型。采用CFD模拟方法,对管道内部气体流场进行模拟,得到气体压力脉动频率。结果发现,阀后流体脉动是引起管道振动的主要原因。在此基础上,提出了在阀后增设隔板的减振措施,减振效果明显。

关键词：气体管道振动气流脉动模态分析减振

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液氢无损储存系统的最新研究进展

低温工程 2006年第6期 53-57页

作者：史俊茹邱利民浙江大学制冷与低温研究所杭州310027

氢的高效、安全储存和输运是氢能发展的主要瓶颈之一。针对液氢储存中存在的蒸发损失问题,介绍了液氢无损储存的概念,并从被动技术和主动技术两方面分类综述了液氢无损储存系统的研究现状。借鉴其它低温液体的无损储存方案,提出利用低... 详细信息

氢的高效、安全储存和输运是氢能发展的主要瓶颈之一。针对液氢储存中存在的蒸发损失问题,介绍了液氢无损储存的概念,并从被动技术和主动技术两方面分类综述了液氢无损储存系统的研究现状。借鉴其它低温液体的无损储存方案,提出利用低温制冷机对大型液氢储槽内蒸发气体进行集中再冷凝的构想。

关键词：液氢无损储存零蒸发低温制冷机再冷凝

The First Five Years of a Phase Theory for Complex Systems and Networks

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IEEE/CAA Journal of Automatica Sinica 2024年第8期11卷 1728-1743页

作者： Dan Wang Wei Chen Li qiu Division of Decision and Control Systems KTH Royal Institute of TechnologyStockholm 10044Sweden Department of Mechanics and Engineering Science&the State Key Laboratory for Turbulence and Complex Systems Peking UniversityBeijing 100871China Hong Kong University of Science and Technology Hong KongChinaand also with the Southern University of Science and TechnologyShenzhen 518055China

In this paper,we review the development of a phase theory for systems and networks in its first five years,represented by a trilogy:Matrix phases and their properties;The MIMO LTI system phase response,its physical interpretations,the small phase theorem,and the sectored real lemma;The synchronization of a multi-agent network using phase *** the end,we also summarize a list of ongoing research on the phase theory and speculate what will happen in the next five years.

关键词： Consensus and synchronization matrix phases multi-agent systems phase theory sectored real lemma small phase theorem.

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丝网热声板叠的最佳填充率

太阳能学报 2001年第3期22卷 322-326页

作者：邱利民蒋宁陈国邦浙江大学制冷与低温工程研究所杭州310027

自行研制了热声驱动脉管制冷机实验台 ,着重研究了热声机械中热声转换的关键部件丝网板叠的填充率对热声驱动脉管制冷机起振温度、制冷温度和加热功率等的影响 ,并通过实验发现了丝网板叠的最佳填充率。以氮和氦作工质 ,分别获得了 196K... 详细信息

自行研制了热声驱动脉管制冷机实验台 ,着重研究了热声机械中热声转换的关键部件丝网板叠的填充率对热声驱动脉管制冷机起振温度、制冷温度和加热功率等的影响 ,并通过实验发现了丝网板叠的最佳填充率。以氮和氦作工质 ,分别获得了 196K和 138K的无负荷制冷温度 ,达到国际先进水平。

关键词：制冷机填充率热声机械丝网热声板叠太阳能热声驱动脉管