检索结果-南通市图书馆

Vertical SnS2/Si heterostructure for tunnel diodes

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(Information Sciences) 2020年第2期63卷 189-195页

作者： rundong JIA Qianqian huang ru huang Key Laboratory of Microelectronic Devices and Circuits (MOE) Institute of Microelectronics Peking University

Tunneling FET（TFET） is considered as one of the most promising low-power electronic devices,however, suffers from the low drive current. Heterostructure TFET with low effective tunnel barrier height based on traditional 3D materials can obtain large tunnel current but deteriorated off-state current induced by the lattice mismatch. van der Waals heterostructure TFET based on 2D materials can obtain danglingbond-free interface for suppressed off-state current but face the challenge of controllable and stable doping technology. As the critical building block of the TFET, tunnel diode based on the 2D/3D heterostructure is proposed in this study and experimentally demonstrated. Combination of the pristine interface of 2D materials and matured doping technology in the traditional 3D bulk materials, tunnel diodes based on the 2D/3D heterostructures are expected to realize low leakage current and high on current simultaneously,showing great potential in low-power electronics. The N+SnS2/P+Si heterostructure with effective tunnel barrier of 0.17 eV theoretically is considered for the first time and selected as the optimal material platform for tunnel diodes. The N+SnS2/P+Si tunnel diode demonstrated experimentally shows the high current density of 1 μA/μm2, which is the highest one among the reported tunnel diodes based on the 2D/group IV materials. The tunneling current is also confirmed by low-temperature measurements. This study shows the great potential of the 2D/3D heterostructure for low-power tunneling devices.

关键词： 2D/3D heterostructure SnS2/Si tunnel barrier tunnel diode energy-efficient

An extended chain Ising model and its Glauber dynamics

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2012年第2期21卷 504-508页

作者： Zhao Xing-Yu huang Xin-ru Fan Xiao-Hui huang yi-Neng Physical College and Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters Yili Normal UniversityYining 835000China Physical College and National Laboratory of Solid State Microstructures Nanjing UniversityNanjing 210093China Department of Physics Shihezi UniversityShihezi 832003China

It was first proposed that an extended chain Ising （ECI） model contains the Ising chain model, single spin doublewell potentials and a pure phonon heat bath of a specific energy exchange with the spins. The extension method is easy to apply to high dimensional cases. Then the single spin-flip probability （rate） of the ECI model is deduced based on the Boltzmann principle and general statistical principles of independent events and the model is simplified to an extended chain Glauber-Ising （ECGI） model. Moreover, the relaxation dynamics of the ECGI model were simulated by the Monte Carlo method and a comparison with the predictions of the special chain Clauber-Ising （SCGI） model was presented. It was found that the results of the two models are consistent with each other when the Ising chain length is large enough and temperature is relative low, which is the most valuable case of the model applications. These show that the ECI model will provide a firm physical base for the widely used single spin-flip rate proposed by Glauber and a possible route to obtain the single spin-flip rate of other form and even the multi-spin-flip rate.

关键词： Ising model Glauber dynamics single spin-flip probability

A novel negative quantum capacitance field-effect transistor with molybdenum disulfide integrated gate stack and steep subthreshold swing for ultra-low power applications

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2023年第6期66卷 71-77页

作者： Liang CHEN Huimin WANG Qianqian huang ru huang School of Integrated Circuits Peking University Beijing Advanced Innovation Center for Integrated Circuits

Various steep-slope devices based on novel structures and mechanisms garnered considerable attention for their potential in ultra-low power logic applications. In this work, a novel steep-slope negative quantum capacitance field-effect transistor(NQCFET)with molybdenum disulfide(MoS2)-integrated gate stack was realized by theoretical analysis and experimental evaluation. By combining the MoS+2 equivalent capacitance model calibrated with experimental results, the NQCFET device model is further *** results demonstrated that the optimized MoS2-integrated NQCFET can achieve a subthreshold swing(SS)of sub-60 mV/dec over a current range of 5 decades, with the minimum SS reaching 29 mV/dec,indicating the remarkable potential of MoS2-integrated NQCFETs for ultra-low power applications.

关键词： negative quantum capacitance molybdenum disulfide field-effect transistor subthreshold swing ultra-low power device

同方期刊数据库

退役锂离子电池正极材料有价金属回收研究进展

在线全文

学校读者我要写书评

暂无评论

现代化工 2025年第1期45卷 66-71页

作者：李子庆董琪黄奕陶义杰张家驿王启黄淮学院能源工程学院河南驻马店463000

针对LiNi_(x)Co_(y)Mn_(1-x-y)O_(2)、LiFePO_(4)、LiMn_(2)O_(4)、LiCoO_(2)4大类锂离子电池正极材料中的目标金属的回收研究现状进行了详细阐述。首先是处理流程的难易程度直接关系到回收成本和效率;其次对不同回收工艺中目标金属的... 详细信息

针对LiNi_(x)Co_(y)Mn_(1-x-y)O_(2)、LiFePO_(4)、LiMn_(2)O_(4)、LiCoO_(2)4大类锂离子电池正极材料中的目标金属的回收研究现状进行了详细阐述。首先是处理流程的难易程度直接关系到回收成本和效率;其次对不同回收工艺中目标金属的提取以及对环境的影响等进行了全面分析;最后对比了不同回收工艺的优缺点,发现每种工艺都有其独特的适用场景和局限性。未来要实现退役锂离子电池的高效、环保处理,需要整合各种工艺的优点,创新回收技术。

关键词：锂离子电池正极材料有价金属回收

Urban Hierarchy of Innovation Capability and Inter-city Linkages of Knowledge in Post-reform China

在线全文

学校读者我要写书评

暂无评论

Chinese Geographical Science 2012年第5期22卷 602-616页

作者： LU Lachang huang ru College of Resource Environment and Tourism Capital Normal UniversityBeijing 100048China School of Geographical Science Guangzhou UniversityGuangzhou 510006China

The 2000s has witnessed increasing interests in cities′role of innovation in the era of knowledge-based *** with substantial empirical analysis on the world city hierarchy of innovation,this paper attempts to examine the national urban hierarchy of innovation capability in China,in terms of ranking systems,spatial pattern and inter-city linkages of knowledge during the post-reform period since the late *** on quantitative analysis such as principal component factor analysis and clustering analysis,this paper identifies the five-tier hierarchy of in-novation,which is headed by Beijing and Shanghai,followed by the capital cities of each province and regional centre *** development of China′s urban hierarchy of innovation capability has been driven by such factors as the scale of innovation,scientific scale,innovation potential and innovation *** paper further investigates the inter-city linkages of knowledge measured by the number of co-authored papers among the *** is positioned in the central position of the knowledge diffusion and knowledge cooperation *** knowledge diffusion among high level cities has occurred than that among the low level cities as well as between the low level cities and high level cities,and provincial capital cities and the regional central cities.

关键词： urban hierarchy innovation capability inter-city linkages of knowledge Chinese cities

A novel tunnel FET design through hybrid modulation with optimized subthreshold characteristics and high drive capability

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2020年第2期63卷 245-247页

作者： Yang ZHAO Qianqian huang ru huang Key Laboratory of Microelectronic Devices and Circuits (MOE) Institute of Microelectronics Peking University National Key Laboratory of Science and Technology on Micro/Nano Fabrication Peking University

Dear editor,As CMOS technology scaling down, the reduction of supply voltage and power consumption becomes extremely difficult due to the subthreshold swing(SS) limitation (60 m V/dec) at room *** FET (TFET) with band-to-band tunneling (BTBT) mechanism is regarded as one of the most promising emerging low-power devices due to its sub-60 m V/dec SS and ultra-low off-current

关键词： A novel tunnel FET design through hybrid modulation with optimized subthreshold characteristics and high drive capability FET

Intravitreous injection of conbercept for bullous retinal detachment:A case report

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2022年第26期10卷 9510-9517页

作者： Xiao-Li Xiang yi-Hong Cao Ting-Wang Jiang Zheng-ru huang Department of Ophthalmology The Affiliated Changshu Hospital of Xuzhou Medical UniversityChangshu 215500Jiangsu ProvinceChina Department of Key Laboratory The Affiliated Changshu Hospital of Xuzhou Medical UniversityChangshu 215500Jiangsu ProvinceChina

BACKGROUND Diffuse retinal pigment epitheliopathy(DRPE)associated with bullous retinal detachment is a severe variant of DRPE that is frequently misdiagnosed and often improperly *** SUMMARY A 36-year-old female patient complained of"painless vision decline in the left eye with obscuration for 10 d".Slit-lamp microscopic fundus examination revealed white-yellow subretinal exudates in the posterior pole in both eyes,retinal detachment with shifting subretinal fluid in the left eye,and no retinal *** fluorescein angiography revealed multiple subretinal leakage foci and localized hypofluorescent lesions with patched *** was fluorescence leakage in the retinal vessels in the retinal detachment area and occluded blood vessels in the lower and peripheral *** green angiography revealed multifocal lamellar hyperfluorescence in the middle stage and low fluorescence in the retinal detachment area in the late *** anatomical reduction significantly improved with intravitreal conbercept *** Intravitreal injection of conbercept can anatomically reattach the retina in patients with bullous retinal detachment.

关键词： Bullous retinal detachment Conbercept Diffuse retinal pigment epitheliopathy Bullous central serous chorioretinopathy Case report

Memristive dynamics enabled neuromorphic computing systems

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(Information Sciences) 2023年第10期66卷 5-19页

作者： Bonan YAN Yuchao YANG ru huang Center for Brain Inspired Chips Institute for Artificial Intelligence Peking University Beijing Advanced Innovation Center for Integrated Circuits School of Integrated Circuits Peking University School of Electronic and Computer Engineering Peking University Center for Brain Inspired Intelligence Chinese Institute for Brain Research(CIBR)

The slowing down of transistor scaling and explosive growth for intelligence computing power emerge as the two driving factors for the study of novel devices and materials to pursue highly-efficient computing systems. Memristors, incorporating rich intrinsic dynamics, are a promising candidate for constructing efficient and scalable bio-inspired computing systems. In this progress report, we review the latest advances in novel types of memristors as well as their applications in implementing neuromorphic computing systems. This paper not only covers the memristive dynamics-enabled bionic computing systems but also discusses the memristive sensory systems that integrate sensing and computing. Eventually, device-circuit co-optimization methods are given to emphasize the trend of cross-layer co-design in this fast-evolving *** innovation in memristor devices mainly focuses on specialized computing hardware and yields superior computing and sensing efficiency. At last, we offer our insight into the trend of state-of-the-art research in memristive materials, devices, circuits, and systems.

关键词： memrsitor memristive dynamics artificial synapse artificial neuron neuromorphic computing

Premature thermal decomposition behavior of 3,4-dinitrofurazanfuroxan with certain types of nitrogen-rich compounds

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2023年第8期26卷 102-110页

作者： Jiao huang ru-fang Peng Bo Jin State Key Laboratory of Environment-friendly Energy Materials Southwest University of Science and TechnologyMianyang621010SichuanPR China

3,4-Dinitrofurazanfuroxan(DNTF),as a high-energy-density material,features good thermal stability and wide *** study aimed to elucidate the thermal decomposition mechanism of DNTF combined with nitrogen-rich compounds containing *** thermal stabilities of DNTF and its hybrid systems were investigated using differential thermal analysis/thermogravimetry(TG),vacuum stability test,and accelerating rate calorimetry under isothermal,non-isothermal,and adiabatic conditions,*** showed that the thermal stability and thermal safety of DNTF significantly decreased after combining with nitrogen-rich compounds containing *** results showed that the activation energy of the DNTF hybrid systems was significantly lower than that of *** TGIR was used to monitor the generation of fugitive gases during the thermal decomposition of the DNTF/5-aminotetrazole(5-ATZ)***,the nitrogen-rich molecules containing N-H interacted extensively with DNTF,and this interaction accelerated the thermal degradation of DNTF.

关键词： DNTF NeH rich Nitrogen compounds Advanced thermal decomposition peak