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Mitigating kinetic hindrance of single-crystal Ni-rich cathodes through morphology modulation,nickel reduction,and lithium vacancy generation achieved by terbium doping

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Journal of Energy Chemistry 2024年第10期97卷 566-574,I0012页

作者： Jiyuan Jian Shuang Lin Guokang Han Xianglian Zhan Yinghui Shan Rang Xiao Ziwei Liu Dandan Sun Xin Zhang Qingjie Zhou Geping Yin Hua huo Yulin Ma Pengjian Zuo Xinqun Cheng Chunyu Du State Key Laboratory of Space Power-sources School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina Zibo Torch Energy Co.Ltd Zibo 255051ShandongChina

Single crystallization has proven to be effective in enhancing the capacity and stability of Ni-rich LiNi_(1-x-y)Co_(x)Mn_(y)O_(2)(SNCM)cathode materials,particularly at high cut-off ***,the synthesis of high-quality single-crystal particles remains challenging because of severe particle agglomeration and irregular ***,the limited kinetics of solid-phase Li^(+)diffusion pose a significant concern because of the extended diffusion path in large single-crystal *** address these challenges,we developed a Tb-doped single-crystal LiNi_(0.83)Co_(0.11)Mn_(0.06)O_(2)(SNCM-Tb)cathode material using a straightforward mixed molten salt sintering *** Tb-doped Ni-rich single crystals presented a quasi-spherical morphology,which is markedly different from those reported in previous ***^(4+)oping significantly enhanced the dynamic transport of Li^(+)ions in the layered oxide phase by reducing the Ni valence state and creating Li vacancies.A SNCM-Tb material with 1 at%Tb doping shows a Li^(+)diffusion coefficient up to more than 9 times higher than pristine SNCM in the non-diluted *** situ X-ray diffraction analysis demonstrated a significantly facilitated H1-H2-H3 phase transition in the SNCM-Tb materials,thereby enhancing their rate capacity and structural ***-Tb exhibited a reversible capacity of 186.9 mA h g^(-1)at 5 C,retaining 94.6%capacity after 100 cycles at 0.5 C under a 4,5 V *** study elucidates the Tb^(4+)doping mechanisms and proposes a scalable method for enhancing the performance of single-crystal Ni-rich NCM materials.

关键词： Lithium-ion batteries Ni-rich layered oxides Single crystals Tb^(4+) doping Li^(+) diffusion kinetics

High-performance eight-channel system with fractal superconducting nanowire single-photon detectors

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Chip 2024年第2期3卷 45-52页

作者： Zifan Hao Kai Zou Yun Meng Jun-Yong Yan Fangyuan Li Yongheng huo Chao-Yuan Jin Feng Liu Thomas Descamps Adrian Iovan Val Zwiller Xiaolong Hu School of Precision Instrument and Optoelectronic Engineering Tianjin UniversityTianjin 300072China Key Laboratory of Optoelectronic Information Science and Technology Ministry of EducationTianjin 300072China State Key Laboratory of Modern Optical Instrumentation College of Information Science and Electronic EngineeringZhejiang UniversityHangzhou 300072China Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences University of Science and Technology of ChinaHefei 230026China Department of Applied Physics Royal Institute of Technology(KTH)SE-10691 StockholmSweden

Superconducting nanowire single-photon detectors(SNSPDs)have become a mainstream photon-counting technology that has been widely applied in various *** far,most multi-channel SNSPD systems,either reported in literature or commercially available,are polarization sensitive,that is,the system detection efficiency(SDE)of each channel is dependent on the state of polarization of the to-be-detected ***,we reported an eight-channel system with fractal SNSPDs working in the wavelength range of 930 to 940 nm,which are all featured with low polarization *** a close-cycled Gifford-McMahon cryocooler system with the base temperature of 2.2 K,we installed and compared the performance of two types of devices:(1)SNSPD,composed of a single,continuous nanowire and(2)superconducting nanowire avalanche photodetector(SNAP),composed of 16 cascaded units of two nanowires electrically connected in *** highest SDE among the eight channels reaches 96+^(4)_(-5%),with the polarization sensitivity of 1.02 and a dark-count rate of 13 counts per *** average SDE for eight channels for all states of polarization is estimated to be 90±5%.It is concluded that both the SNSPDs and the SNAPs can reach saturated,high SDE at the wavelength of interest,and the SNSPDs show lower dark-count(false-count)rates,whereas the SNAPs show better properties in the time *** the adoption of this system,we showcased the measurements of the second-order photon-correlation functions of light emission from a singlephoton source based on a semiconductor quantum dot and from a pulsed *** is believed that this work will provide new choices of systems with single-photon detectors combining the merits of high SDE,low polarization sensitivity,and low noise that can be tailored for different applications.

关键词： Superconducting nanowire single-photon detector Superconducting strip photon detector Fractal Quantum optics Photon correlation

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译者行为批评理论的存在主义哲学思辨

外语研究 2024年第3期41卷 6-11,111页

作者：霍红扬州大学外国语学院江苏扬州225009

译者行为批评理论观照“人”的行为,是存在主义哲学思想于翻译研究的映射,是翻译活动的认识论,也是翻译研究的方法论。该理论提出的“翻译内”与“翻译外”分野、“求真—务实”连续统评价模式以及“文本—行为—社会”三位一体的评价系... 详细信息

译者行为批评理论观照“人”的行为,是存在主义哲学思想于翻译研究的映射,是翻译活动的认识论,也是翻译研究的方法论。该理论提出的“翻译内”与“翻译外”分野、“求真—务实”连续统评价模式以及“文本—行为—社会”三位一体的评价系统,既是对人与“文本”“社会”这两种“在世界之中”的不同存在方式的动态交互分析,也是对人与文本和人与社会双重建构翻译终本的译者行为动态分析。研究译者行为是将“人本性”归还翻译研究的哲学探索。

关键词：译者行为批评人本文本存在主义哲学

关注有晶状体眼后房型人工晶状体植入手术的安全性

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中华眼科杂志 2024年第6期60卷 479-483页

作者：叶剑霍妍解放军陆军特色医学中心(大坪医院)眼科重庆400042 华厦渝州眼科医院重庆400042

有晶状体眼后房型人工晶状体植入手术属于眼内屈光手术。随着人工晶状体材质和设计改进,近年该手术在眼科临床得到迅速推广和普及,而手术方式改变和术后并发症引发的安全问题,需要临床给予高度关注。本文从影响手术安全性的关键环节入手... 详细信息

有晶状体眼后房型人工晶状体植入手术属于眼内屈光手术。随着人工晶状体材质和设计改进,近年该手术在眼科临床得到迅速推广和普及,而手术方式改变和术后并发症引发的安全问题,需要临床给予高度关注。本文从影响手术安全性的关键环节入手,基于相关特点、机制及现状,阐明其重要性并指出应对措施,以期为临床开展工作提供指导,不断提高有晶状体眼后房型人工晶状体植入手术的安全性,促进该手术健康发展。

关键词：有晶状体眼人工晶状体植入术晶体植入眼内白内障

Development of a new cerebral ischemia reperfusion model of Mongolian gerbils and standardized evaluation system

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Animal Models and Experimental Medicine 2024年第1期7卷 48-55页

作者： Ying Wu Caijiao Hu Zhihui Li Feiyang Li Jianyi Lv Meng Guo Xin Liu Changlong Li Xueyun huo Zhenwen Chen Lifeng Yang Xiaoyan Du School of Basic Medical Sciences Capital Medical UniversityBeijingChina Laboratory for Clinical Medicine Capital Medical UniversityBeijingChina College of Veterinary Medicine China Agricultural UniversityBeijingChina

Background:The Mongolian gerbil is an excellent laboratory animal for preparing the cerebral ischemia model due to its inherent deficiency in the circle of ***,the low incidence and unpredictability of symptoms are caused by numerous complex variant types of the ***,the lack of an evaluation system for the cer-ebral ischemia/reperfusion(I/R)model of gerbils has shackled the application of this ***:We created a symptom-oriented principle and detailed neurobehavioral scoring *** different time points of reperfusion,we analyzed the alteration in locomotion by rotarod test and grip force score,infarct volume by triphenyltetrazo-lium chloride(TTC)staining,neuron loss using Nissl staining,and histological charac-teristics using hematoxylin-eosin(H&E)***:With a successful model rate of 56%,32 of the 57 gerbils operated by our method harbored typical features of cerebral I/R injury,and the mortality rate in the male gerbils was significantly higher than that in the female *** suc-cessfully prepared I/R gerbils demonstrated a significant reduction in motility and grip strength at 1 day after reperfusion;formed obvious infarction;exhibited typi-cal pathological features,such as tissue edema,neuronal atrophy and death,and vacuolated structures;and were partially recovered with the extension of reperfu-sion ***:This study developed a new method for the unilateral common carotid artery ligation I/R model of gerbil and established a standardized evaluation system for this model,which could provide a new cerebral I/R model of gerbils with more practical applications.

关键词： ischemia/reperfusion Mongolian gerbil standardized model system unilateral carotid occlusion

Heterologous expression facilitates the discovery and characterization of marine microbial natural products

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Engineering Microbiology 2024年第2期4卷 77-90页

作者： Shuang Zhao Ruiying Feng Yuan Gu Liyuan Han Xiaomei Cong Yang Liu Shuo Liu Qiyao Shen Liujie huo Fu Yan State Key Laboratory of Microbial Technology Shandong UniversityQingdao 266237China Helmholtz-Institute for Pharmaceutical Research Saarland Saarland University Campus66123SaarbrückenGermany

Microbial natural products and their derivatives have been developed as a considerable part of clinical drugs and agricultural *** microbial natural products exhibit diverse chemical structures and bioactivities with substantial potential for the development of novel ***,discovering compounds with new skeletons from marine microbes remains *** recent decades,multiple approaches have been de-veloped to discover novel marine microbial natural products,among which heterologous expression has proven to be an effective *** by large DNA cloning and comparative metabolomic technologies,a few novel bioactive natural products from marine microorganisms have been identified by the expression of their biosynthetic gene clusters(BGCs)in heterologous *** expression is advantageous for character-izing gene functions and elucidating the biosynthetic mechanisms of natural *** review provides an overview of recent progress in heterologous expression-guided discovery,biosynthetic mechanism elucidation,and yield optimization of natural products from marine microorganisms and discusses the future directions of the heterologous expression strategy in facilitating novel natural product exploitation.

关键词： Marine natural products Heterologous expression Biosynthetic gene clusters Biosynthetic mechanism

中葡之间:过渡时期中国澳门文学选集中的文化政治

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中国比较文学 2024年第1期134卷 177-194页

作者：霍超群澳门科技大学国际学院中国澳门

在漫长的葡据岁月里,中国澳门逐渐形成了“基督城”和“中国城”两个互相区隔的区域,本文以过渡时期在澳门地区出版的3套文学选集为样本,意在阐明“澳门”乃是一个各方话语竞逐的文学空间。澳葡政府的官方机构中国澳门文化司署牵头推出... 详细信息

在漫长的葡据岁月里,中国澳门逐渐形成了“基督城”和“中国城”两个互相区隔的区域,本文以过渡时期在澳门地区出版的3套文学选集为样本,意在阐明“澳门”乃是一个各方话语竞逐的文学空间。澳葡政府的官方机构中国澳门文化司署牵头推出的“葡语作家丛书”,企图在“澳门文学”中植入葡萄牙民族精神;中国澳门基金会组织本地作家群体选编的“澳门文学‘五选’”,则借“澳门文学的根在中国”的“元叙事”来表达他们的身份认同;中国澳门文学研究界合作推出的《澳门土生文学作品选》试图调和上述矛盾,强调土生文学的跨文化身份,但这一建构并非纯然客观,是最终夺得文化领导权的一方对土生葡人的文学传统的“发明”。考察过渡时期中国澳门文学生成的历史语境及其复数形态,有助于思考区域文学中的跨区域属性。

关键词：过渡时期中国澳门文学文学选集文化政治跨区域

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DEPA数据跨境流动:规制差异与中国因应

国际经贸探索 2024年第3期40卷 107-120页

作者：霍俊先厦门大学台湾研究院法律研究所

当下是全球数字贸易规则构建的关键时期,如何规制数据跨境流动是核心议题。作为数字治理新式代表的DEPA,其规则具有前瞻性、开放性、包容性等特征,对全球数字贸易治理格局产生了重要影响,加入DEPA对中国而言具有一定的战略价值。实践中... 详细信息

当下是全球数字贸易规则构建的关键时期,如何规制数据跨境流动是核心议题。作为数字治理新式代表的DEPA,其规则具有前瞻性、开放性、包容性等特征,对全球数字贸易治理格局产生了重要影响,加入DEPA对中国而言具有一定的战略价值。实践中,包括RCEP和国内法在内的中国对数据跨境流动的规制与DEPA规则存在一定程度上的不协调性。为此,中国应坚守合作包容的理念,从构建多样化管辖、自贸区(港)制度探索、加强共建“一带一路”等三方面探索高标准、高水平的数据跨境流动规则,实现与DEPA规则衔接,完善数字治理“中式模板”,从而为构建全球统一的数据治理格局贡献中国智慧。

关键词： DEPA RCEP 数据跨境流动数据治理数据安全数字贸易规则

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单向应力作用下地下采空区顶板破坏规律特征

有色金属工程 2024年第1期14卷 130-137页

作者：霍健张泉陶治臣陈晓青辽宁科技大学矿业工程学院辽宁鞍山114051 鞍钢基石矿业有限公司辽宁鞍山114051

针对单向应力作用于地下采空区顶板的破坏规律特性问题,基于弹性薄板理论和压力拱理论,利用单轴压力试验机对顶板模型进行了试验,并探究了不同荷载条件下顶板模型的受压过程和变形特性。结果表明:顶板的破坏过程与峰值应力是否超过疲劳... 详细信息

针对单向应力作用于地下采空区顶板的破坏规律特性问题,基于弹性薄板理论和压力拱理论,利用单轴压力试验机对顶板模型进行了试验,并探究了不同荷载条件下顶板模型的受压过程和变形特性。结果表明:顶板的破坏过程与峰值应力是否超过疲劳强度密切相关,超过疲劳强度时会出现加速破坏阶段;顶板的变形过程可以分为三个阶段,分别对应于不同的应力和应变变化规律;顶板的失稳破坏位置与荷载条件有关,周期荷载条件下更容易导致整体垮落塌陷;侧帮支撑作用对顶板的承载能力和稳定性有正面影响,但也会增加应力集中和变形。研究结果对于理解顶板在不同荷载条件下的力学行为和提高顶板的安全性具有重要意义。

关键词：岩石力学地下空区弹性薄板压力拱应力应变