检索结果-南通市图书馆

Mobile-ionic FETs with ultra-scaled amorphous dielectric achieving ferroelectric behaviors and sub-kT/q swing with temperature down to 77 K

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第1期67卷 312-313页

作者： Huan LIU Qiyu YANG Chengji JIN Jiajia CHEN Lulu chou Xiao YU Yan LIU Genquan han Research Center for Intelligent Chips School of Microelectronics Xidian University

The steep subthreshold swing (SS) could be achieved in negative capacitance field-effect transistors (NCFET) to reduce power dissipation in modern electronics. Polycrystalline Hf O2-based ferroelectric materials have attracted great interest due to their better thickness scalability and CMOS process compatibility [1].

关键词：

Bi@C nanosphere anode with Na^(+)-ether-solvent cointercalation behavior to achieve fast sodium storage under extreme low temperatures

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Carbon Energy 2024年第9期6卷 325-337页

作者： Lingli Liu Siqi Li Lei Hu Xin Liang Wei Yang Xulai Yang Kunhong Hu Chaofeng Hou Yongsheng han Shulei chou School of Energy Materials and Chemical EngineeringHefei UniversityHefeiChina LIB Technology Center of Anhui Province Hefei UniversityHefeiChina School of Advanced Manufacturing Engineering Hefei UniversityHefeiChina State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijingChina Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhouChina

The low ion transport is a major obstacle for low-temperature(LT)sodium-ion batteries(SIBs).Herein,a core-shell structure of bismuth(Bi)nanospheres coated with carbon(Bi@C)is constructed by utilizing a novel Bi-based complex(1,4,5,8-naphthalenetetracarboxylic dianhydride as the ligand)as the precursor,which provides an effective template to fabricate Bi-based ***-40℃,the Bi@C anode achieves a high capacity,which is equivalent to 96%of that at 25℃,benefitting from the core-shell nanostructured engineering and Na^(+)-ether-solvent cointercalation *** special Na+-diglyme cointercalation behavior may effectively reduce the activation energy and accelerate the Na+diffusion kinetics,enabling the excellent low-temperature performance of the Bi@C *** expected,the fabricated Na_(3)V_(2)(PO_(4))_(3)//Bi@C full-cell delivers impressive rechargeability in the ether-based electrolyte at-40℃.Density functional theory calculations and electrochemical tests also reveal the fast reaction kinetic mechanism at LT,thanks to a much lower diffusion energy barrier(167 meV)and a lower reaction activation energy(32.2 kJ mol^(-1))of Bi@C anode in comparison with that of bulk *** work provides a rational design of Bi-based electrodes for rechargeable SIBs under extreme conditions.

关键词： bismuth core-shell structure low-temperature conditions sodium-ion batteries

Layered oxide cathodes for sodium-ion batteries:microstructure design,local chemistry and structural unit

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第1期67卷 191-213页

作者： Ling-Yi Kong han-Xiao Liu Yan-Fang Zhu Jia-Yang Li Yu Su Hong-Wei Li Hai-Yan Hu Yi-Feng Liu Ming-Jing Yang Zhuang-Chun Jian Xin-Bei Jia Shu-Lei chou Yao Xiao Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China

Because of the low price and abundant reserves of sodium compared with lithium,the research of sodium-ion batteries(SIBs)in the field of large-scale energy storage has returned to the research *** oxides distinguish themselves from the mains cathode materials of SIBs owing to their advantages such as high specific capacity,simple synthesis route,and environmental ***,the commercial development of the layered oxides is limited by sluggish kinetics,complex phase transition and poor air *** on the research ideas from macro-to micro-scale,this review systematically summarizes the current optimization strategies of sodium-ion layered oxide cathodes(SLOC)from different dimensions:microstructure design,local chemistry regulation and structural unit *** the dimension of microstructure design,the various structures such as the microspheres,nanoplates,nanowires and exposed active facets are prepared to improve the slow kinetics and electrochemical ***,from the view of local chemistry regulation by chemical element substitution,the intrinsic electron/ion properties of SLOC have been enhanced to strengthen the structural ***,the optimization idea of endeavors to regulate the physical and chemical properties of cathode materials essentially is put forward from the dimension of structural unit *** opinions and strategies proposed in this review will provide some inspirations for the design of new SLOC in the future.

关键词： sodium-ion batteries layered oxide cathodes microstructure design local chemistry structural unit

在线全文

学校读者我要写书评

暂无评论

有限相依随机序列的非贝叶斯变点最优监测

应用概率统计 2024年第2期40卷 277-286页

作者：韩东宗福季上海交通大学数学科学学院统计系上海200240 香港科技大学工业工程及决策分析学系中国香港香港科技大学(广州)数据科学与分析系广州510700

本文研究了有限相依样本序列的非贝叶斯变点检测问题.通过引入非负动态随机控制线,我们不仅构造并证明了两个最优控制图,而且还得到了比原定义更容易计算的Lorden测度和Pollak测度的最小值的表达式.

关键词：最优控制图非贝叶斯变点监测相依样本序列

在线全文

学校读者我要写书评

暂无评论

国际法实践中的双重标准及我国的应对

当代法学 2024年第4期38卷 134-149页

作者：韩逸畴华东政法大学国际法学院

双重标准经常在国际关系讨论中被引用,用以表达一个国家对待文明的矛盾态度。欧洲国际法律人在19世纪用“文明标准”捍卫欧洲人对非欧洲社会殖民和控制的权利。彼时,国际法被视为文明与进步的标志和工具。冷战后,西方国家不断强化人权... 详细信息

双重标准经常在国际关系讨论中被引用,用以表达一个国家对待文明的矛盾态度。欧洲国际法律人在19世纪用“文明标准”捍卫欧洲人对非欧洲社会殖民和控制的权利。彼时,国际法被视为文明与进步的标志和工具。冷战后,西方国家不断强化人权、民主和市场经济的概念,弱化国家主权的重要性,并经常在国际议题上采取双重标准的做法,如不断指责我国违反新的文明标准。然而,我国国际法学者对双重标准的研究成果较少。为应对国际法中的双重标准实践,我国应正确认识到“国际法共同体”并不存在一个亘古不变的“文明”,并应反对西方国家肆意解释国际法和实行双重标准的做法。此外,我国应积极促进文明间的对话,不仅承认西方或非西方文明之间的差异,而且承认共同价值观和共同利益,以应对我们今天面临的无数全球性挑战。

关键词：文明标准进步叙事双重标准良好的国际公民负责任大国

Validation of a steel dual-core self-centering brace （DC-SCB） for seismic resistance： from brace member to one-story one-bay braced frame tests

在线全文

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2016年第3期10卷 303-311页

作者： Chung-Che chou Ping-Ting CHUNG tsung-han WU Alexis Rafael Ovalle BEATO Department of Civil Engineering Taiwan University Taipei Taiwan China Director Center for Earthquake Engineering Research (CEER) Taiwan University Taipei Taiwan China

A steel dual-core self-centering brace （DC-SCB） is an innovative structural member that provides both energy dissipation and self-centering properties to structures, reducing maximum and residual drifts of structures in earthquakes. The axial deformation capacity of the DC-SCB is doubled by a parallel arrangement of two inner cores, one outer box and two sets of tensioning elements. This paper presents cyclic test results of a DC-SCB component and a full- scale one-story, one-bay steel frame with a DC-SCB. The DC-SCB that was near 8 m-long was tested to evaluate its cyclic behavior and durability. The DC-SCB performed well under a total of three increasing cyclic loading tests and 60 low- cycle fatigue loading tests without failure. The maximum axial load of the DC-SCB was near 1700 kN at an interstory drift of 2.5%. Moreover, a three-story dual-core self-centering braced frame （DC-SCBF） with a single-diagonal DC-SCB was designed and its first-story, one-bay DC-SCBF subassembly specimen was tested in multiple earthquake-type loadings. The one-story, one-bay subassembly frame specimen performed well up to an interstory drift of 2% with yielding at the column base and local buckling in the steel beam; no damage of the DC-SCB was found after all tests. The maximum residual drift of the DC-SCBF caused by beam local buckling was 0.5% in 2.0% drift cycles.

关键词： dual-core self-centering brace (DC-SCB) braced frame tests residual deformation

基于MaxEnt模型的核桃炭疽病适生性分析

在线全文

学校读者我要写书评

暂无评论

林业科学研究 2024年第3期37卷 68-78页

作者：薄淑文喻红稠韩长志西南林业大学林学院云南昆明650224 云南省森林灾害预警与控制重点实验室云南昆明650224

[目的]根据核桃炭疽病的已知分布情况,对它在中国范围内和云南省范围内的适生区分别进行预测分析,明确核桃炭疽病在我国潜在的分布区范围,有助于生产上采取科学高效的监测和预防措施,降低潜在的生态和经济损失。[方法]利用MaxEnt物种分... 详细信息

[目的]根据核桃炭疽病的已知分布情况,对它在中国范围内和云南省范围内的适生区分别进行预测分析,明确核桃炭疽病在我国潜在的分布区范围,有助于生产上采取科学高效的监测和预防措施,降低潜在的生态和经济损失。[方法]利用MaxEnt物种分布模型,通过筛选生物气候变量和优化模型参数构建表现最佳的模型,进而应用于核桃炭疽病在中国和云南省范围内的适生区的预测。利用ArcGIS软件对预测结果进行可视化处理和面积统计,并利用模型的结果对影响核桃炭疽病的主要环境因素进行分析。[结果]MaxEnt模型预测结果显示:影响核桃炭疽病适生性的主导环境因子主要有年降雨量、最干月份降雨量、温度季节性、最冷季度平均温度、年平均温度、等温性、平均日较差和最暖季度平均降雨量等。核桃炭疽病在中国生态适宜区总面积约为317.12万平方公里,占国土总面积的33.03%,主要分布在我国华中、华东、华南的全部地区以及西南大部分地区和“三北”(西北、华北、东北)少部分地区;核桃炭疽病在云南的适生区主要集中在滇西地区,约为22.64万平方公里,占省总面积的57.44%。[结论]核桃炭疽病在中国有着较为广泛的适生区域,尤以云南省核桃炭疽病发生点数量最多和高度适生区分布区域最广泛,预测适生区与已经获取核桃炭疽病分布点结果相一致,未来应结合当地核桃炭疽病菌的生物学特征和实地分布情况进一步加强核桃炭疽病的预测和防治。

关键词：核桃炭疽病适生性 MaxEnt模型中国云南

Widely-wavelength-tunable brillouin fiber laser with improved optical signal-to-noise ratio based on parity-time symmetric and saturable absorption effect

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

中国光学（中英文） 2024年第5期17卷 1244-1253页

作者： LIU Yi JIANG Kai FANG Xin-yue YOU Ya-jun HE Wen-jun HOU Jia-xin han Xue-feng chou Xiu-jian State Key Laboratory of Dynamic Measurement Technology School of Instrument and ElectronicsNorth University of ChinaTaiyuan 030051China School of Aerospace Engineering North University of ChinaTaiyuan 030051China Shanxi Province Key Laboratory of Quantum Sensing and Precision Measurement North University of ChinaTaiyuan 030051China

A widely-wavelength-tunable Brillouin fiber laser(BFL)with improved optical signal-to-noise ratio(OSNR)based on parity-time(PT)symmetric and saturable absorption(SA)effect is *** novel BFL realizes PT symmetry and SA effect through polarization-maintaining erbium-doped fiber(PM-EDF)Sagnac loop,which is composed of a PM-EDF,a coupler and two polarization controllers(PCs).By using the inherent birefringence characteristic of PM-EDF,two feedback loops in orthogonal polarization state are formed when the Strokes signal in *** of these loops provides gain in the clockwise direction with in the Sagnac loop,while the other loop generates loss in the counterclockwise *** adjusting the PCs to control the polarization state of the PM-EDF,a single-longitudinal-mode(SLM)BFL can be achieved,as the PT symmetry is broken when the SA participating stimulated Brillouin scattering(SBS)gain and loss are well-matched and the gain surpasses the coupling *** to previous BFLs,the proposed BFL has a more streamlined structure and a wider wavelength tunable range,at the same time,it is not being limited by the bandwidth of the erbium-doped fiber amplifier while still maintaining narrow linewidth SLM ***,thanks to SA effect of the PM-EDF,the PT symmetric SBS gain contract is enhanced,resulting in a higher optical signal-to-noise(OSNR).The experimental results show that the laser has a wide tunable range of 1526.088 nm to 1565.498 nm,an improved OSNR of 77 dB,and a fine linewidth as small as 140.5 Hz.

关键词： Brillouin fiber laser widely-wavelength-tunable parity-time symmetric high OSNR narrow linewidth

热电联产型共享储能的技经分析与市场机制研究

在线全文

学校读者我要写书评

暂无评论

全球能源互联网 2024年第2期7卷 190-200页

作者：冶兆年韩恺王永真何继江丑鹏北京理工大学能源与动力工程系北京市海淀区100085 北京理工大学重庆创新中心重庆市渝北区401120 清华大学社会科学学院能源转型与社会发展研究中心北京市海淀区100081 新疆鹏煜能源科技集团有限公司新疆维吾尔自治区哈密市839000

以可再生能源和储能为主体的新型能源系统建设已成为能源转型的发展趋势。针对当前电化学储能面临技术经济性差以及供用能在品质上存在不匹配的问题,基于能量梯级综合利用的理念和共享经济的模式,提出热电联产型共享储能系统的技术与业... 详细信息

以可再生能源和储能为主体的新型能源系统建设已成为能源转型的发展趋势。针对当前电化学储能面临技术经济性差以及供用能在品质上存在不匹配的问题,基于能量梯级综合利用的理念和共享经济的模式,提出热电联产型共享储能系统的技术与业态,探讨该类储能的基本运行原理、技术经济特性和商业模式。以高温固体蓄热、余热锅炉与汽轮机组成的典型热电联产型共享储能系统的案例分析表明,以固体蓄热为储能设备的热电联产型共享储能系统,在现有市场环境下实现系统经济性最优的容量配置和运行调度时,系统内部收益率达到10.6%、投资回收期为8.2 a。同时,研究并揭示了容量租赁比例、辅助服务价格、供热以及储能单位投资对共享储能电站技术经济性能的影响规律。最后,从技术及市场层面对热电联产型共享储能系统存在的等效储能容量、多重收益模式等关键问题进行了讨论。

关键词：共享储能热电联产新型能源系统综合能源商业模式